Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Trading Arrangement: Trading Arrangement [Axis] Land Under Development Land Under Development Disclosure [Text Block] The entire disclosure for land under development. Title of 12(b) Security Title of 12(b) Security Document Fiscal Year Focus Document Fiscal Year Focus Adjustment to Compensation, Amount Adjustment to Compensation Amount Financial Instrument Financial Instrument [Axis] North East North East [Member] The Homebuilding reportable segment in the North East geographic area is comprised of operating divisions in New Jersey and Eastern Pennsylvania. Segment Reporting [Abstract] Segment Reporting [Abstract] Common stock, $0.01 par value; 60,000,000 shares authorized; 20,555,330 shares issued as of both March 31, 2026 and December 31, 2025 Common Stock, Value, Issued Interest expense Interest Expense, Operating and Nonoperating Leases Lessee, Finance Leases [Text Block] Total risk of loss Guarantor Obligations, Maximum Exposure, Undiscounted Restatement Determination Date Restatement Determination Date Aggregate investment Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Measurement Frequency Measurement Frequency [Axis] Increase in contract land deposits Increase (Decrease) in Deposits Outstanding Corporate Capital Allocation Charge Corporate capital allocation Corporate Capital Allocation Charge The corporate capital allocation charge is eliminated in consolidation and is based on the segment’s average net assets employed. Reconciliation of Selling General And Administrative Expense from Segments to Consolidated Reconciliation of Selling General And Administrative Expense from Segments to Consolidated [Table Text Block] Reconciliation of Selling General And Administrative Expense from Segments to Consolidated Amendment Flag Amendment Flag Consolidated Entities Consolidated Entities [Axis] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Joint Ventures [Line Items] Joint Ventures [Line Items] Joint ventures. Principal payments on finance lease liabilities Financing cash flows from finance leases Finance Lease, Principal Payments Letters of credit related to lots Letter Of Credit On Lot Purchase Agreements Letter of credit on lot purchase agreements. Mid East Mid East [Member] The Homebuilding reportable segment in the Mid East geographic area is comprised of operating divisions in New York, Ohio, Western Pennsylvania, Indiana and Illinois. Deferred Compensation Liability Deferred Compensation Liability [Member] Deferred compensation liability. Mortgage loans closed Payment for Origination, Loan, Mortgage, Held-for-Sale Leases [Abstract] Leases [Abstract] Consolidated Entities Consolidated Entities [Domain] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Schedule of Corporate Capital Allocation Table Schedule of Corporate Capital Allocation Table [Table Text Block] Schedule of Corporate Capital Allocation Table Entity Address, State or Province Entity Address, State or Province PEO Total Compensation Amount PEO Total Compensation Amount Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Derivative, Notional Amount Derivative, Notional Amount Basic weighted average shares outstanding (in shares) Weighted average number of shares outstanding used to calculate basic EPS (in shares) Weighted Average Number of Shares Outstanding, Basic Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Number of reportable segments Number of Reportable Segments Selling, General, And Administrative Expense, Adjusted Selling, General, And Administrative Expense, Adjusted Selling, General, And Administrative Expense, Adjusted Subsegments Consolidation Items [Axis] Subsegments Consolidation Items [Axis] Contract land deposit reserve adjustment Contract Land Deposit Reserve Adjustment Contract land deposit reserve adjustment. Entity Address, City or Town Entity Address, City or Town ScheduleofSupplementalCashFlowInformationRelatedtoLeases ScheduleofSupplementalCashFlowInformationRelatedtoLeases [Table Text Block] ScheduleofSupplementalCashFlowInformationRelatedtoLeases Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Reissued shares during the period, shares (in shares) Stock Issued During Period Shares Treasury Stock Reissued Upon Exercise Of Stock Option And Other Number of treasury shares reissued during the period to satisfy equity-based compensation obligations exercised by the holders of such rights. Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Mid Atlantic Mid Atlantic [Member] The Homebuilding reportable segment in the Mid Atlantic geographic area is comprised of operating divisions in Maryland, Virginia, West Virginia, Delaware and Washington, D.C. Inventory: Inventory, Net [Abstract] Level 2 Fair Value, Inputs, Level 2 [Member] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Maximum loan borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Lots controlled by NVR Lots Controlled By Company Lots controlled by NVR. Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Assets Segment Reporting, Reconciliation of Asset by Segment to Consolidated [Table Text Block] Mortgage loans sold and principal payments on mortgage loans held for sale Proceeds from Sale, Loan, Mortgage, Held-for-Sale Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Provision Costs Accrued For New Warranty Contracts And Changes In Estimates For Pre Existing Warranties Represents the aggregate increase in the liability for accruals related to standard and extended product warranties issued during the reporting period and changes in estimates for pre-existing warranties. Home Building Segment Home Building Segment [Member] Home Building Segment Less treasury stock at cost – 17,823,503 and 17,755,943 shares as of March 31, 2026 and December 31, 2025, respectively Treasury Stock, Value Recently Adopted Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Increase (decrease) in customer deposits Increase (Decrease) in Contract with Customer, Liability Gain on sale of loans, net Gain (Loss) on Sale of Mortgage Loans Revenue from Contract with Customer Revenue from Contract with Customer [Policy Text Block] Additional funding commitments in the aggregate Aggregate Additional Funding Commitments Aggregate additional funding commitments. Document Period End Date Document Period End Date Net change in assets and liabilities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Senior notes principal amount Debt Instrument, Face Amount Shareholders' Equity Equity [Text Block] Security Exchange Name Security Exchange Name Segment Reporting, Reconciliation of Other Item by Segment to Consolidated Segment Reporting, Reconciliation of Other Item by Segment to Consolidated [Table Text Block] Revenues Segment Reporting, Reconciliation of Revenue by Segment to Consolidated [Table Text Block] Senior notes effective interest rate Debt Instrument, Interest Rate, Effective Percentage Finance leases Finance Lease, Weighted Average Remaining Lease Term Entity Shell Company Entity Shell Company Consolidation Items Consolidation Items [Domain] Weighted-average discount rate: Leases, Weighted Average Discount Rates [Abstract] Leases, Weighted Average Discount Rates Summary of Changes in Product Warranties Reserve Schedule of Product Warranty Liability [Table Text Block] Weighted-average remaining lease term (in years): Leases, Weighted Average Lease Terms [Abstract] Leases, Weighted Average Lease Terms Finance lease right-of-use assets Finance Lease, Right-of-Use Asset, after Accumulated Amortization Earnings per Share Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Earnings Per Share [Abstract] Earnings Per Share [Abstract] Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] $600M Senior Notes Due Two Thousand Thirty $600M Senior Notes Due Two Thousand Thirty [Member] $600M Senior Notes Due Two Thousand Thirty Weighted Average Shares and Share Equivalents Used to Calculate Basic and Diluted Earnings Per Share Schedule of Weighted Average Number of Shares [Table Text Block] Document Fiscal Period Focus Document Fiscal Period Focus Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Total liabilities Liabilities Trading Symbol Trading Symbol Unallocated corporate overhead Unallocated Corporate Overhead Unallocated corporate overhead. Geographical Geographical [Domain] Purchase of property, plant and equipment Payments to Acquire Property, Plant, and Equipment Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Company Selected Measure Name Company Selected Measure Name Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Dilutive securities: Weighted Average Number of Shares Outstanding, Diluted, Adjustment [Abstract] Interest income Interest and Fee Income, Loan, Held-for-Sale, Mortgage Total Inventory Building Inventory Building Inventory Credit Facility Credit Facility [Domain] Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] Diluted weighted average shares outstanding (in shares) Weighted average number of shares and share equivalents outstanding used to calculate diluted EPS (in shares) Weighted Average Number of Shares Outstanding, Diluted Entity Emerging Growth Company Entity Emerging Growth Company Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Borrowing base limitations Line of Credit Facility, Current Borrowing Capacity Operating cash flows from operating leases Operating Lease, Payments Award Timing Predetermined Award Timing Predetermined [Flag] Treasury Stock, Common Treasury Stock, Common [Member] Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Equity-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Effective tax rate Effective Income Tax Rate Reconciliation, Percent Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Stock options and restricted share units (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements All Executive Categories All Executive Categories [Member] Rate Lock Commitments Interest Rate Lock Commitments [Member] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Senior Notes fair value Long-Term Debt, Fair Value Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure [Abstract] Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure [Abstract] Operating lease right-of-use assets Operating Lease, Right-of-Use Asset Consolidation adjustments and other Consolidation Adjustments And Other Consolidation adjustments and other. Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Debt Instrument, Name Debt Instrument, Name [Domain] Contract on Raw Ground with Landowners Raw Ground Contracts Variable Interest Entity Not Primary Beneficiary [Member] Raw ground contracts variable interest entity not primary beneficiary. Segment Disclosures Segment Reporting [Text Block] Expiration Date Trading Arrangement Expiration Date Variable Interest Entities ("VIEs") Variable Interest Entity Disclosure [Text Block] Restricted cash Restricted cash and cash equivalents Restricted Cash and Cash Equivalent Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Common stock, shares authorized (in shares) Common Stock, Shares Authorized Exercise Price Award Exercise Price Fair Value, Recurring Fair Value, Recurring [Member] Corporate and Reconciling Items Corporate Reconciling Items And Eliminations [Member] Corporate reconciling items and eliminations. Segment Reporting [Line Items] Segment Reporting [Line Items] Document Quarterly Report Document Quarterly Report Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Segments Segments [Domain] Debt outstanding Warehouse Agreement Borrowings Receivables Accounts Receivable, after Allowance for Credit Loss Debt Debt Disclosure [Text Block] Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Equity Component Equity Component [Domain] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Mortgage loans held for sale, net Financing Receivable, Held-for-Sale, Not Part of Disposal Group, after Valuation Allowance Adoption Date Trading Arrangement Adoption Date Finance leases Finance Lease, Weighted Average Discount Rate, Percent Senior notes interest rate Debt Instrument, Interest Rate, Stated Percentage Total shareholders' equity Beginning Balance Ending Balance Stockholders' Equity Attributable to Parent Equity, Attributable to Parent ASSETS Assets [Abstract] Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Increase in commitment available Line Of Credit Maximum Incremental Commitment Amount The Maximum Incremental Commitment amount is the sum of all incremental commitments under the repurchase facility. Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Operating lease liabilities Operating Lease, Liability Insider Trading Policies and Procedures [Line Items] Finance Lease, Liability Finance Lease, Liability Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Selling, general and administrative Selling, General and Administrative Expense Additional Senior Notes Due Two Thousand Thirty $300M Senior Notes Due Two Thousand Thirty [Member] $300M Senior Notes Due Two Thousand Thirty Letter of Credit Letter of Credit [Member] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Contract land deposit impairments, net Contract Land Deposit Impairment Recoveries Amount of impairment or subsequent recovery related to contract land deposits. Anti-dilutive securities (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Summary of Antidilutive Securities Excluded from Computation of Earnings Per Share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Entity Central Index Key Entity Central Index Key Additional paid-in capital Additional Paid in Capital, Common Stock All Adjustments to Compensation All Adjustments to Compensation [Member] Segment Reporting, Reconciling Item, Corporate Nonsegment Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] Other, net Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Other Item Operating lease, option to extend Lessee, Operating Lease, Option to Extend Equity [Abstract] Equity [Abstract] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Net Contract Land Deposit Impairment Recoveries Net Contract Land Deposit Impairment Recoveries Net Contract Land Deposit Impairment Recoveries Income Statement [Abstract] Income Statement [Abstract] Shareholders' equity: Equity, Attributable to Parent [Abstract] Document Transition Report Document Transition Report Fair Value, Hierarchy Fair Value Hierarchy and NAV [Axis] Deferred taxes Deferred Income Tax Assets, Net Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Other Commitments [Domain] Other Commitments [Domain] City Area Code City Area Code All Individuals All Individuals [Member] Name Forgone Recovery, Individual Name Number of finished lots expected to be developed from raw parcels of land Number Of Finished Lots Expected To Be Developed From Raw Parcels Of Land Number of finished lots expected to be developed from raw parcels of land. Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Statement [Line Items] Statement [Line Items] Total assets Assets Variable Interest Entities Variable Interest Entity, Not Primary Beneficiary [Member] Operating Segments Operating Segments [Member] Loan, Mortgage, Held-for-Sale, Fair Value Disclosure Loan, Mortgage, Held-for-Sale, Fair Value Disclosure Maximum range of deposits required under the purchase agreements Maximum Percentage Of Deposits Required Under Purchase Agreements Maximum percentage of deposits required under the purchase agreements. Accounts payable and other liabilities Accounts Payable and Other Accrued Liabilities Loss reserve on contract land deposits Allowance for losses on contract land deposits Contract land deposit allowance Loss Reserve On Contract Land Deposits The reserve account established to account for expected but unspecified losses related to contract land deposits. PEO PEO [Member] Refundable deposits and letters of credit Refundable Deposits Portion of deposits and letters of credit made on raw land contracts which may be refundable. Gross liabilities Derivative Asset, Subject to Master Netting Arrangement, Liability Offset Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Proceeds from real estate joint ventures Proceeds from Real Estate and Real Estate Joint Ventures Retained Earnings Retained Earnings [Member] Deferred compensation trust – 106,697 shares of NVR, Inc. common stock as of both March 31, 2026 and December 31, 2025 Common Stock, Shares Held in Employee Trust Revolving Credit Facility Revolving Credit Facility [Member] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Award Timing Disclosures [Line Items] Diluted earnings per share (USD per share) Earnings Per Share, Diluted Entity Current Reporting Status Entity Current Reporting Status Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount Adjustments to reconcile net income to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Property, plant and equipment, net Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Summary of Changes in Shareholders' Equity Schedule of Stockholders Equity [Table Text Block] Investments in and advances to unconsolidated joint ventures Payments to Acquire Interest in Joint Venture Financial Instruments Financial Instruments [Domain] Building materials and other Real Estate Inventory, Construction Materials Other income Other Income Treasury stock issued upon Option exercise and RSU vesting Stock Issued During Period, Value, Stock Options Exercised Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Underlying Securities Award Underlying Securities Amount Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Subsegments [Domain] Subsegments [Domain] Land under development Carrying value of raw parcels of land Inventory, Real Estate, Land and Land Development Costs Subsegments [Axis] Subsegments [Axis] Increase in inventory Increase (Decrease) in Inventories Lots and housing units, covered under sales agreements with customers Lots And Housing Units Covered Under Sales Agreements With Customers Carrying amount as of balance sheet date of lots and capitalized construction costs of homes covered under sales agreements with customers. Operating leases Operating Lease, Weighted Average Discount Rate, Percent Contingent obligations in the form of letters of credit Letters Of Credit Related To Lots Letters of credit related to contract land deposits. Segment Reporting [Table] Segment Reporting [Table] Excess tax benefit recognized Adjustment To Income Tax Expense Income Tax Effect From Share Based Compensation Net Amount of increase (decrease) in income tax expense resulting from a tax benefit (deficiency) associated with a share-based compensation plan other than an employee stock ownership plan (ESOP). Cash flows from investing activities: Cash Provided by (Used in) Investing Activity, Continuing Operation [Abstract] Components of Lease Expense and Other Information related to Leases Lease, Cost [Table Text Block] Cash flows from operating activities: Cash Provided by (Used in) Operating Activity, Continuing Operation [Abstract] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Current Fiscal Year End Date Current Fiscal Year End Date Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Entity File Number Entity File Number Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Senior Notes Due Two Thousand Thirty Senior Notes Due Two Thousand Thirty [Member] Senior Notes Due Two Thousand Thirty Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Senior notes Senior Notes carrying value Senior Notes Common stock, shares issued (in shares) Common Stock, Shares, Issued Measure: Measure [Axis] Joint Ventures Equity Method Investments and Joint Ventures Disclosure [Text Block] Total Risk of Loss Related to Contract Land Deposits Schedule of Variable Interest Entities [Table Text Block] Treasury stock (in shares) Treasury Stock, Common, Shares Mortgage Banking Mortgage Banking Segment [Member] Mortgage Banking Segment Forward Sales Contracts Forward Contracts [Member] Equity Components Equity Components [Axis] Stockholders' Equity [Line Items] Class of Stock [Line Items] Contract cost Capitalized Contract Cost, Net Income taxes paid during the period, net of refunds Income Tax Paid, after Refund Received Entity Interactive Data Current Entity Interactive Data Current Deferred compensation liability Deferred Compensation Liability, Current and Noncurrent Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Total fair value measurement gain/(loss) Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net Entity Small Business Entity Small Business Consolidation adjustments and other Consolidation Entries And Other For Assets Consolidation entries and other for assets. Termination Date Trading Arrangement Termination Date Other Commitments [Axis] Other Commitments [Axis] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Proceeds from Sale of Real Estate Proceeds from Sale of Real Estate Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Product Warranties Product Warranty Disclosure [Text Block] Cash flows from financing activities: Cash Provided by (Used in) Financing Activity, Continuing Operation [Abstract] Document Type Document Type Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value as of Grant Date Award Grant Date Fair Value Mortgages Held for Sale Mortgages Held For Sale [Member] Mortgages held for sale. ROU assets obtained in exchange for lease obligations: Leases, Right Of Use Assets Obtained in Exchange for Lease Obligations [Abstract] Leases, Right Of Use Assets Obtained in Exchange for Lease Obligations Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Arrangement Duration Trading Arrangement Duration Local Phone Number Local Phone Number Consolidation Items Consolidation Items [Axis] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Commitments and contingencies Commitments and Contingencies Revenues Revenues Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] New Accounting Pronouncements or Change in Accounting Principle [Table] Accounting Standards Update and Change in Accounting Principle [Table] Increase in accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Executive Category: Executive Category [Axis] Finance Lease, Right-of-Use Asset, Amortization Finance Lease, Right-of-Use Asset, Amortization LIABILITIES AND SHAREHOLDERS' EQUITY Liabilities and Equity [Abstract] All Award Types Award Type [Domain] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Finance Lease, Interest Expense Finance Lease, Interest Expense Gain (Loss) on sales of loans Gain (Loss) on Sales of Loans, Net Fair Value Fair Value Disclosures [Text Block] Warranty reserve, beginning of period Warranty reserve, end of period Standard and Extended Product Warranty Accrual Variable Interest Entity [Table] Variable Interest Entity [Table] Supplemental disclosures of cash flow information: Supplemental Cash Flow Information [Abstract] Common stock repurchased (in shares) Treasury Stock, Shares, Acquired Deferred Compensation Trust Deferred Compensation Trust [Member] Deferred compensation trust. Operating lease, term Lessee, Operating Lease, Term of Contract PEO Name PEO Name Geographical Geographical [Axis] Proceeds from the sale of ownership interest in unconsolidated joint ventures Proceeds from Divestiture of Interest in Joint Venture Customer deposits Contract liabilities for customer deposits Contract with Customer, Liability Segment Reporting, Other Segment Item, Amount Segment Reporting, Other Segment Item, Amount Other assets Other Assets Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Purchase of common stock for treasury Treasury Stock, Value, Acquired, Cost Method Treasury Stock, Value, Acquired, Cost Method Cash, restricted cash, and cash equivalents, beginning of the period Cash, restricted cash, and cash equivalents, end of the period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Payments Standard and Extended Product Warranty Accrual, Decrease for Payments Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Fair Value, Measurement Frequency Measurement Frequency [Domain] Debt Instrument Debt Instrument [Axis] Equity-based compensation expense Equity-based compensation expense Share-Based Payment Arrangement, Noncash Expense Lease, Cost Lease, Cost Repurchase Agreement Repurchase Agreement [Member] A revolving line of credit facility used by NVR Mortgage to finance the purchase of loans. Subsegments Consolidation Items [Domain] Subsegments Consolidation Items [Domain] Leases Lessee, Operating Leases [Text Block] Long-term Debt, Type Long-Term Debt, Type [Domain] Basic earnings per share (USD per share) Earnings Per Share, Basic Purchase of treasury stock Payments for Repurchase of Common Stock Insider Trading Arrangements [Line Items] Award Type Award Type [Axis] Short-term Lease Payments Short-Term Lease, Cost Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Retained earnings Retained Earnings (Accumulated Deficit) Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Common Stock Common Stock [Member] Operating Lease, Cost Operating Lease, Cost Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Number of joint ventures Number Of Joint Ventures Number of joint ventures. Significant Accounting Policies Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Cover page. Cover [Abstract] Unsold lots and housing units Unsold Lots And Housing Units Carrying amount as of the balance sheet date of lots and capitalized construction costs of homes not covered under sales agreements with customers. Interest income Corporate Interest Income Corporate Interest Income Proceeds from Options exercised APIC, Share-Based Payment Arrangement, Recognition and Exercise Equity Awards Adjustments Equity Awards Adjustments [Member] Total liabilities and shareholders' equity Liabilities and Equity Intangible assets Intangible Asset, Including Goodwill, after Accumulated Amortization Employee Stock Option Share-Based Payment Arrangement, Option [Member] Segments Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Tabular List, Table Tabular List [Table Text Block] Fair Value Measurement Unrealized Gain Loss From Change In Fair Value Measurements Included In Earnings [Table Text Block] Unrealized gain (loss) from change in fair value measurements of derivatives not designated as hedging instruments included in earnings. Contract land deposits, net Contract land deposits, net Deposits Assets Joint Ventures [Table] Joint Ventures [Table] Joint ventures. Name Awards Close in Time to MNPI Disclosures, Individual Name Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] General and administrative General and Administrative Expense Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward] Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward] Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Contract land deposits in cash Contract land deposits Contract Land Deposits The gross amount as of the balance sheet date of deposits paid to secure the right to purchase finished lots. Adjustment to Compensation: Adjustment to Compensation [Axis] Supplemental Cash Flows Information: Leases, Cash Flow Information Abstract [Abstract] Leases, Cash Flow Information Abstract Product Warranties Disclosures [Abstract] Product Warranties Disclosures [Abstract] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Operating cash flows from finance leases Finance Lease, Interest Payment on Liability Interest paid during the period, net of interest capitalized Interest Paid, Excluding Capitalized Interest, Operating Activity Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Corporate Interest Expense Corporate Interest Expense Corporate Interest Expense Credit Facility Credit Facility [Axis] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Credit Agreement Credit Agreement [Member] Arrangement in which aggregate revolving loan commitments can be obtained by NVR for use in working capital and general corporate purposes. The total amount borrowed cannot exceed a specified maximum amount, which is also subject to certain sublimit. Frequency of senior notes payment Debt Instrument, Frequency of Periodic Payment Accounts payable Accounts Payable Name Measure Name Income Taxes Income Tax Disclosure [Text Block] Pay vs Performance Disclosure [Line Items] Net rate lock commitments and forward sales contracts Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value Fair Value Hierarchy Fair Value Hierarchy and NAV [Domain] Debt Instrument [Line Items] Debt Instrument [Line Items] Reconciliation of Cost of Product and Services Sold from Segments to Consolidated Reconciliation of Cost of Product and Services Sold from Segments to Consolidated [Table Text Block] Reconciliation of Cost of Product and Services Sold from Segments to Consolidated Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Additional Paid-In Capital Additional Paid-in Capital [Member] Income before taxes Income (Loss) from Continuing Operations before Income Taxes, Domestic Entity Filer Category Entity Filer Category Accrued expenses and other liabilities Accrued Liabilities Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and Cash Equivalent Company Selected Measure Amount Company Selected Measure Amount Expected production of finished lots Expected Production Of Finished Lots From Joint Ventures Expected production of finished lots from joint ventures. Profit before Taxes Segment Reporting, Reconciliation of Profit (Loss) by Segment to Consolidated [Table Text Block] Equity Method Investments and Joint Ventures [Abstract] Equity Method Investments and Joint Ventures [Abstract] Depreciation and amortization Depreciation, Depletion and Amortization Entity Address, Address Line Two Entity Address, Address Line Two Stock, Class of Stock [Table] Stock, Class of Stock [Table] Finance leases Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Real Estate [Abstract] Real Estate [Abstract] Operating leases Operating Lease, Weighted Average Remaining Lease Term Non-PEO NEO Non-PEO NEO [Member] Entity Address, Address Line One Entity Address, Address Line One Operating leases Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Undesignated Derivative Instruments Schedule Of Undesignated Derivative Instruments In Statement Of Financial Position Fair Value [Table Text Block] Tabular disclosure of the location and fair value amounts of derivative instruments not designated as hedging instruments reported in the statement of financial position. Letters of credit outstanding Line of Credit Facility, Fair Value of Amount Outstanding Income tax expense Income Tax Expense (Benefit) Cost of Product and Service Sold Cost of Product and Service Sold Cost of Product and Service Sold Award Timing Method Award Timing Method [Text Block] Net decrease in cash, restricted cash, and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Net income Net income Net Income (Loss) Attributable to Parent Long-term Debt, Type Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Location, Statement of Financial Position, Balance [Axis] Location, Statement of Financial Position, Balance [Axis] Proceeds from the sale of property, plant and equipment Proceeds from Sale of Property, Plant, and Equipment Statement [Table] Statement [Table] Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member] Restatement Determination Date: Restatement Determination Date [Axis] Proceeds from the exercise of stock options Proceeds from Stock Options Exercised Deferred compensation trust (in shares) Common Stock, Shares Held in Employee Trust, Shares Corporate and Reconciling Items Corporate And Reconciling Items [Member] Corporate And Reconciling Items Contract land deposits in cash under lot purchase Agreements Contract Land Deposits On Lot Purchase Agreements The gross amount as of the balance sheet date of deposits paid to secure the right to purchase finished lots under lot purchase agreements. Decrease (increase) in receivables Increase (Decrease) in Receivables Gross assets Derivative Asset, Subject to Master Netting Arrangement, before Offset South East South East [Member] The Homebuilding reportable segment in the South East geographic area is comprised of operating divisions in North Carolina, South Carolina, Florida and Tennessee. Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block]