NVR (NVR) 10-K 13 Feb 19 2018 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Feb. 11, 2019	Jun. 30, 2018
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	FY
Trading Symbol	NVR
Entity Registrant Name	NVR INC
Entity Central Index Key	906,163
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		3,616,917
Entity Public Float			$ 10,109,057
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Shell Company	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
ASSETS
Cash and cash equivalents	$ 732,248	$ 689,557
Inventory:
Land under development	38,857	34,212
Contract land deposits, net	396,177	370,429
Total assets	3,165,933	2,989,279
LIABILITIES AND SHAREHOLDERS' EQUITY
Total liabilities	1,357,371	1,383,787
Commitments and contingencies
Shareholders' equity:
Common stock, $0.01 par value; 60,000,000 shares authorized; 20,555,330 shares issued as of both December 31, 2017 and December 31, 2016	206	206
Additional paid-in capital	1,820,223	1,644,197
Deferred compensation trust – 108,640 shares of NVR, Inc. common stock as of both December 31, 2017 and December 31, 2016	(16,937)	(17,383)
Deferred compensation liability	16,937	17,383
Retained earnings	7,031,333	6,231,940
Less treasury stock at cost – 16,864,324 and 16,862,327 shares as of December 31, 2017 and December 31, 2016, respectively	(7,043,200)	(6,270,851)
Total shareholders' equity	1,808,562	1,605,492
Total liabilities and shareholders' equity	3,165,933	2,989,279
Homebuilding:
ASSETS
Cash and cash equivalents	688,783	645,087
Restricted cash	16,982	19,438
Receivables	18,641	20,026
Inventory:
Lots and housing units, covered under sales agreements with customers	1,076,904	1,046,094
Unsold lots and housing units	115,631	148,620
Land under development	38,857	34,212
Building materials and other	21,718	17,273
Total Inventory	1,253,110	1,246,199
Contract land deposits, net	396,177	370,429
Property, plant and equipment, net	42,234	43,191
Reorganization value in excess of amounts allocable to identifiable assets, net	41,580	41,580
Deferred tax assets, net	112,333	111,953
Other assets	71,671	86,977
Total assets	2,641,511	2,584,880
LIABILITIES AND SHAREHOLDERS' EQUITY
Accounts payable	244,496	261,973
Accrued expenses and other liabilities	332,871	341,891
Customer deposits	138,246	150,033
Senior notes	597,681	597,066
Total liabilities	1,313,294	1,350,963
Mortgage Banking:
ASSETS
Cash and cash equivalents	23,092	21,707
Restricted cash	3,071	2,256
Mortgage loans held for sale, net	458,324	352,489
Inventory:
Property, plant and equipment, net	6,510	6,327
Reorganization value in excess of amounts allocable to identifiable assets, net	7,347	7,347
Other assets	26,078	14,273
Total assets	524,422	404,399
LIABILITIES AND SHAREHOLDERS' EQUITY
Accounts payable and other liabilities	44,077	32,824
Total liabilities	$ 44,077	$ 32,824

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	60,000,000	60,000,000
Common stock, shares issued	20,555,330	20,555,330
Deferred compensation trust, shares	107,340	108,640
Treasury stock, shares	16,977,499	16,864,324

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Mortgage banking fees	$ 7,163,674	$ 6,305,840	$ 5,822,544
Interest expense	(25,081)	(24,185)	(21,707)
Income before taxes	959,732	846,911	661,697
Income tax expense	(162,535)	(309,390)	(236,435)
Net income	$ 797,197	$ 537,521	$ 425,262
Basic earnings per share (USD per share)	$ 219.58	$ 144	$ 110.53
Diluted earnings per share (USD per share)	$ 194.80	$ 126.77	$ 103.61
Basic weighted average shares outstanding (in Shares)	3,631	3,733	3,847
Diluted weighted average shares outstanding (in Shares)	4,092	4,240	4,104
Homebuilding:
Mortgage banking fees	$ 7,004,304	$ 6,175,521	$ 5,709,223
Other income	11,839	6,536	2,820
Cost of sales	(5,692,127)	(4,990,378)	(4,707,861)
Selling, general and administrative	(428,874)	(392,272)	(382,459)
Operating income	895,142	799,407	621,723
Interest expense	(24,036)	(23,037)	(20,621)
Income before taxes	871,106	776,370	601,102
Mortgage Banking:
Mortgage banking fees	159,370	130,319	113,321
Interest income	11,593	7,850	7,569
Other income	2,546	2,048	1,652
General and administrative	(83,838)	(68,528)	(60,861)
Interest expense	(1,045)	(1,148)	(1,086)
Income before taxes	$ 88,626	$ 70,541	$ 60,595

Consolidated Statements of Shar

Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock	Deferred Compensation Trust	Deferred Compensation Liability
Beginning Balance at Dec. 31, 2015	$ 1,239,165	$ 206	$ 1,447,795	$ 5,270,114	$ (5,478,950)	$ (17,333)	$ 17,333
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	425,262			425,262
Deferred compensation activity						(42)	42
Purchase of common stock for treasury	(455,351)				(455,351)
Equity-based compensation	43,598		43,598
Tax benefit from equity benefit plan activity	13,661		13,661
Proceeds from stock options exercised	38,106		38,106
Treasury stock issued upon option exercise and restricted share vesting			(27,332)		27,332
Ending Balance at Dec. 31, 2016	1,304,441	206	1,515,828	5,695,376	(5,906,969)	(17,375)	17,375
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	537,521			537,521
Deferred compensation activity						(8)	8
Purchase of common stock for treasury	(422,166)				(422,166)
Equity-based compensation	44,562		44,562
Proceeds from stock options exercised	140,525		140,525
Treasury stock issued upon option exercise and restricted share vesting			(58,284)		58,284
Ending Balance at Dec. 31, 2017	1,605,492	206	1,644,197	6,231,940	(6,270,851)	(17,383)	17,383
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative-effect adjustment from adoption of ASU 2016-09, net of tax	609		1,566	(957)
Net income	797,197			797,197
Deferred compensation activity						446	(446)
Purchase of common stock for treasury	(846,134)				(846,134)
Equity-based compensation	75,701		75,701
Proceeds from stock options exercised	174,110		174,110
Treasury stock issued upon option exercise and restricted share vesting			(73,785)		73,785
Ending Balance at Dec. 31, 2018	1,808,562	$ 206	$ 1,820,223	7,031,333	$ (7,043,200)	$ (16,937)	$ 16,937
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative-effect adjustment from adoption of ASU 2016-09, net of tax	$ 2,196			$ 2,196

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities:
Net income	$ 797,197	$ 537,521	$ 425,262
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	20,168	22,667	22,269
Equity-based compensation expense	75,701	44,562	43,598
Contract land deposit impairments (recoveries), net	11,760	1,238	(4,269)
Gain on sale of loans, net	(122,755)	(99,132)	(85,535)
Deferred tax expense (benefit)	914	61,290	(10,024)
Mortgage loans closed	(4,828,615)	(4,077,372)	(3,660,269)
Mortgage loans sold and principal payments on mortgage loans held for sale	4,845,999	4,182,220	3,710,250
Distribution of earnings from unconsolidated joint ventures	4,596	4,788	10,016
Net change in assets and liabilities:
Increase in inventory	(6,911)	(154,099)	(85,194)
Decrease (increase) in contract land deposits	(30,863)	8,177	(32,280)
Increase in receivables	(1,008)	(348)	(8,779)
Increase in accounts payable and accrued expenses	(30,713)	10,789	58,532
Increase in customer deposits	(11,787)	27,797	11,271
Other, net	(557)	256	(1,860)
Net cash provided by operating activities	723,126	570,354	392,988
Cash flows from investing activities:
Investments in and advances to unconsolidated joint ventures	(284)	(3,800)	(653)
Distribution of capital from unconsolidated joint ventures	10,515	8,029	11,672
Purchase of property, plant and equipment	(19,665)	(20,269)	(22,369)
Proceeds from the sale of property, plant and equipment	1,257	847	1,000
Net cash used in investing activities	(8,177)	(15,193)	(10,350)
Cash flows from financing activities:
Purchase of treasury stock	(846,134)	(422,166)	(455,351)
Distributions to partner in consolidated variable interest entity	(234)	0	(150)
Proceeds from the exercise of stock options	174,110	140,525	38,106
Net cash used in financing activities	(672,258)	(281,641)	(417,395)
Net increase (decrease) in cash and cash equivalents	42,691	273,520	(34,757)
Cash and cash equivalents, beginning of the year	689,557	416,037	450,794
Cash and cash equivalents, end of the year	732,248	689,557	416,037
Supplemental disclosures of cash flow information:
Interest paid during the year, net of interest capitalized	24,178	23,251	20,922
Income taxes paid during the year, net of refunds	$ 181,166	$ 260,232	$ 218,984

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Principles of Consolidation The accompanying consolidated financial statements include the accounts of NVR, Inc. and its subsidiaries (“NVR” or the “Company”) and certain other entities in which the Company is deemed to be the primary beneficiary (see Notes 3 and 4 herein for additional information). All significant intercompany transactions have been eliminated in consolidation. Use of Estimates in the Preparation of Financial Statements The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting periods. Management continually evaluates the estimates used to prepare the consolidated financial statements and updates those estimates as necessary. In general, the Company’s estimates are based on historical experience, on information from third party professionals, and other various assumptions that are believed to be reasonable under the facts and circumstances. Actual results could differ materially from those estimates made by management. Cash and Cash Equivalents Cash and cash equivalents include short-term investments with original maturities of three months or less. Homebuilding restricted cash was attributable to customer deposits for certain home sales. Mortgage banking restricted cash included amounts collected from customers for loans in process and closed mortgage loans held for sale. At December 31, 2018 and 2017 , $320 and $1,069 , respectively, of cash related to a consolidated variable interest entity is included in homebuilding “Other assets” on the accompanying consolidated balance sheet. Homebuilding Inventory The carrying value of inventory is stated at the lower of cost or market value. Cost of lots and completed and uncompleted housing units represent the accumulated actual cost of the units. Field construction supervisors’ salaries and related direct overhead expenses are included in inventory costs. Interest costs are not capitalized into inventory, with the exception of land under development and joint venture investments, as applicable (see below). Upon settlement, the cost of the unit is expensed on a specific identification basis. Cost of building materials is determined on a first-in, first-out basis. Sold inventory is evaluated for impairment based on the contractual sales price compared to the total estimated cost to construct. Unsold inventory is evaluated for impairment by analyzing recent comparable sales prices within the applicable community compared to the costs incurred to date plus the expected costs to complete. Any calculated impairments are recorded immediately. Contract Land Deposits The Company purchases finished lots under fixed price lot purchase agreements (“Lot Purchase Agreements”) that require deposits that may be forfeited if NVR fails to perform under the contract. The deposits are in the form of cash or letters of credit in varying amounts and represent a percentage of the aggregate purchase price of the finished lots. NVR maintains an allowance for losses on contract land deposits that reflects the Company’s judgment of the present loss exposure in the existing contract land deposit portfolio at the end of the reporting period. To analyze contract land deposit impairments, NVR conducts a loss contingency analysis each quarter. In addition to considering market and economic conditions, NVR assesses contract land deposit impairments on a community-by-community basis pursuant to the purchase contract terms, analyzing, as applicable, current sales absorption levels, recent sales’ direct profit, the dollar differential between the contractual purchase price and the current market price for lots, a developer’s financial stability, a developer’s financial ability or willingness to reduce lot prices to current market prices, if necessary, and the contract’s default status by either the Company or the developer along with an analysis of the expected outcome of any such default. NVR’s analysis is focused on whether the Company can sell houses at an acceptable margin and sales pace in a particular community in the current market with which the Company is faced. Because the Company does not own the finished lots on which the Company has placed a contract land deposit, if the above analysis leads to a determination that the Company cannot sell homes at an acceptable margin and sales pace at the current contractual lot price, the Company then determines whether it will elect to default under the contract, forfeit the deposit and terminate the contract, or whether the Company will attempt to restructure the lot purchase contract, which may require it to forfeit the deposit to obtain contract concessions from a developer. The Company also assesses whether impairment is present due to collectability issues resulting from a developer’s non-performance because of financial or other conditions. For the years ended December 31, 2018 and 2017 , the Company incurred net pre-tax charges of $5,115 and $1,238 , respectively, related to the impairment of contract land deposits. For the year ended December 31, 2016 , the Company recognized net pre-tax recoveries of $4,269 of contract land deposits previously determined to be unrecoverable. The contract land deposit assets on the accompanying consolidated balance sheets are shown net of the allowance for losses of $29,216 and $29,999 at December 31, 2018 and 2017 , respectively. Land Under Development On a limited basis, NVR directly acquires raw parcels of land already zoned for its intended use to develop into finished lots. Land under development includes the land acquisition costs, direct improvement costs, capitalized interest, where applicable, and real estate taxes. Land under development, including the land under development held by the Company’s unconsolidated joint ventures and the related joint venture investments, is reviewed for potential write-downs when impairment indicators are present. In addition to considering market and economic conditions, the Company assesses land under development impairments on a community-by-community basis, analyzing, as applicable, current sales absorption levels, recent sales’ direct profit, and the dollar differential between the projected fully-developed cost of the lots and the current market price for lots. If indicators of impairment are present for a community, NVR performs an analysis to determine if the undiscounted cash flows estimated to be generated by those assets are less than their carrying amounts, and if so, impairment charges are required to be recorded in an amount by which the carrying amount of the assets exceeds the fair value of such assets. The Company’s determination of fair value is primarily based on discounting the estimated future cash flows at a rate commensurate with the inherent risks associated with the assets and related estimated cash flow streams. See Notes 4 and 5 for further discussion of land under development and joint venture investments, respectively. Property, Plant, and Equipment Property, plant, and equipment are carried at cost less accumulated depreciation and amortization. Depreciation is based on the estimated useful lives of the assets using the straight-line method. Model home furniture and fixtures are generally depreciated over a two -year period, office facilities and other equipment are depreciated over a period of three to ten years and production facilities are depreciated over periods of five to forty years. Intangible Assets On December 31, 2012, the Company acquired substantially all of the assets of Heartland Homes, Inc., which resulted in the Company recording finite-lived intangible assets and goodwill. The Company completed its annual assessment for impairment of goodwill and management determined that there was no impairment. As of December 31, 2018 and 2017 , finite-lived intangible assets, net of accumulated amortization, totaled $621 and $776 , respectively. The remaining finite-lived intangible assets will be amortized on a straight-line basis over 4 years. As of both December 31, 2018 and 2017 , the goodwill value was $441 . Finite-lived intangible assets and goodwill are included in homebuilding "Other assets" in the accompanying consolidated balance sheets. Warranty/Product Liability Reserves The Company establishes warranty and product liability reserves to provide for estimated future expenses as a result of construction and product defects, product recalls and litigation incidental to NVR’s homebuilding business. Liability estimates are determined based on management’s judgment considering such factors as historical experience, the likely current cost of corrective action, manufacturers’ and subcontractors’ participation in sharing the cost of corrective action, consultations with third party experts such as engineers, and discussions with the Company’s General Counsel and outside counsel retained to handle specific product liability cases. Mortgage Repurchase Reserve, Mortgage Loans Held for Sale and Derivatives and Hedging Activities NVR originates several different loan products to its customers to finance the purchase of a home through its wholly-owned mortgage subsidiary, NVR Mortgage Finance, Inc. (“NVRM”). NVRM sells all of the loans it originates into the secondary market on a servicing released basis, typically within 30 days from closing. All of the loans that NVRM originates are underwritten to the standards and specifications of the ultimate investor. Those underwriting standards are typically equal to or more stringent than the underwriting standards required by Fannie Mae (“FNMA”), Freddie Mac ("FHLMC"), the Department of Veterans Affairs (“VA”) and the Federal Housing Administration (“FHA”). Insofar as NVRM underwrites its originated loans to those standards, NVRM bears no increased concentration of credit risk from the issuance of loans, except in certain limited instances where early payment default occurs. NVRM employs a quality control department to ensure that its underwriting controls are effectively operating, and further assesses the underwriting function as part of its assessment of internal controls over financial reporting. NVRM maintains a reserve for losses on mortgage loans originated that reflects NVR’s judgment of the present loss exposure in the loans that NVRM has originated and sold. The reserve is calculated based on an analysis of historical experience and exposure (see Note 15 herein for further information). Mortgage loans held for sale are recorded at fair value when closed, and thereafter are carried at the lower of cost or fair value, net of deferred origination costs, until sold. In the normal course of business, NVRM enters into contractual commitments to extend credit to buyers of single-family homes with fixed expiration dates. The commitments become effective when the borrowers “lock-in” a specified interest rate within time frames established by NVRM. All mortgagors are evaluated for credit worthiness prior to the extension of the commitment. Market risk arises if interest rates move adversely between the time of the “lock-in” of rates by the borrower and the sale date of the loan to a broker/dealer. To mitigate the effect of the interest rate risk inherent in providing rate lock commitments to borrowers, NVRM enters into optional or mandatory delivery forward sale contracts to sell whole loans and mortgage-backed securities to broker/dealers. The forward sale contracts lock-in an interest rate and price for the sale of loans similar to the specific rate lock commitments. NVRM does not engage in speculative or trading derivative activities. Both the rate lock commitments to borrowers and the forward sale contracts to broker/dealers are undesignated derivatives, and, accordingly, are marked to fair value through earnings. At December 31, 2018 , there were contractual commitments to extend credit to borrowers aggregating $682,152 , and open forward delivery sale contracts aggregating $1,089,923 , which hedge both the rate lock loan commitments and closed loans held for sale (see Note 14 herein for a description of the Company’s fair value accounting). Earnings per Share The following weighted average shares and share equivalents were used to calculate basic and diluted earnings per share for the years ended December 31, 2018 , 2017 and 2016 : Year Ended December 31, 2018 2017 2016 Weighted average number of shares outstanding used to calculate basic EPS 3,631 3,733 3,847 Dilutive securities: Stock options and restricted share units 461 507 257 Weighted average number of shares and share equivalents outstanding used to calculate diluted EPS 4,092 4,240 4,104 The assumed proceeds used in the treasury method for calculating NVR’s diluted earnings per share includes the amount the employee must pay upon exercise and the amount of compensation cost attributed to future services not yet recognized. The following stock options issued under equity incentive plans were outstanding during the years ended December 31, 2018 , 2017 and 2016 , but were not included in the computation of diluted earnings per share because the effect would have been anti-dilutive. Year Ended December 31, 2018 2017 2016 Anti-dilutive securities 370 15 87 Revenues – Homebuilding Operations NVR builds single-family detached homes, townhomes and condominium buildings, which generally are constructed on a pre-sold basis. Revenue is recognized on the settlement date at the contract sales price,when control is transferred to our customers. Mortgage Banking Fees Mortgage banking fees include income earned by NVRM for originating mortgage loans, servicing mortgage loans held on an interim basis, title fees, gains and losses on the sale of mortgage loans and mortgage servicing and other activities incidental to mortgage banking. Mortgage banking fees are generally recognized after the loan has been sold to an unaffiliated, third party investor. Income Taxes Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax basis. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on the deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. See Note 11 herein for discussion of the impact on the Company's deferred tax asset resulting from the enactment of the Tax Cuts and Jobs Act in December 2017. ASC 740-10, Income Taxes , provides that a tax benefit from an uncertain tax position may be recognized when it is more-likely-than-not (defined as a likelihood of more than 50%) that the position will be sustained upon examination, including resolution of any related appeals or litigation processes, based on the technical merits. If a tax position does not meet the more-likely-than-not recognition threshold, despite the Company’s belief that its filing position is supportable, the benefit of that tax position is not recognized in the statements of income. The Company recognizes interest related to unrecognized tax benefits as a component of income tax expense. Based on its historical experience in dealing with various taxing authorities, the Company has found that it is the administrative practice of the taxing authorities to not seek penalties from the Company for the tax positions it has taken on its returns related to its unrecognized tax benefits. Therefore, the Company does not accrue penalties for the positions in which it has an unrecognized tax benefit. However, if such penalties were to be accrued, they would be recorded as a component of income tax expense. The Company recognizes unrecognized tax benefits in the period that the uncertainty is eliminated by either affirmative agreement of the uncertain tax position by the applicable taxing authority, by expiration of the applicable statute of limitation, or by determination in accordance with certain states’ administrative practices that the uncertain tax position has been effectively settled (see Note 11 herein for further information). Financial Instruments Except as otherwise noted herein, NVR believes that the carrying value approximates the fair value of its financial instruments (see Note 14 herein for further information). Equity-Based Compensation The Company recognizes equity-based compensation expense within its income statement for all share-based payment arrangements, which includes non-qualified stock options to purchase shares of NVR common stock ("Options") and restricted share units ("RSUs"). Compensation expense is based on the grant-date fair value of the Options and RSUs granted, and is recognized on a straight-line basis over the requisite service period for the entire award (from the date of grant through the period of the last separately vesting portion of the grant). Options and RSUs which are subject to a performance condition are treated as a separate award from the “service-only” Options and RSUs, and compensation expense is recognized when it becomes probable that the stated performance target will be achieved. The Company calculates the fair value of its Options, which are non-publicly traded, using the Black-Scholes option-pricing model. The grant date fair value of the RSUs is the closing price of the Company’s common stock on the day immediately preceding the date of grant. The reversal of compensation expense previously recognized for grants forfeited is recorded in the period in which the forfeiture occurs. The Company’s equity-based compensation plans are accounted for as equity-classified awards (see Note 12 herein for further discussion of equity-based compensation plans). Comprehensive Income For the years ended December 31, 2018 , 2017 and 2016 , comprehensive income equaled net income; therefore, a separate statement of comprehensive income is not included in the accompanying consolidated financial statements. Reclassifications Certain prior period amounts have been reclassified to conform to the current year's presentation. Recent Accounting Pronouncements Recently Adopted Accounting Pronouncements Revenue from Contracts with Customers On January 1, 2018, the Company adopted Accounting Standards Update ("ASU") 2014-09, Revenue from Contracts with Customers (Topic 606) , using the modified retrospective method applied to those contracts which were not completed as of January 1, 2018. Revenue Recognition Consistent with the Company’s previous revenue recognition practice, homebuilding revenue is recognized on the settlement date at the contract sales price, when control is transferred to our customers. Mortgage banking revenue recognition continues to be governed by Accounting Standards Codification ("ASC") Topic 815 - Derivatives and Hedging and ASC Topic 825 - Financial Instruments, and is not subject to Topic 606. See Note 2 for disclosure of revenue by reporting segment. The Company’s contract liabilities, consisting of deposits received from customers (“Handmoney”) on homes not settled, were $138,246 and $150,033 as of December 31, 2018 and 2017 , respectively. For the year ended December 31, 2018 , the Company recognized in revenue substantially all of the $150,033 in Handmoney held as of December 31, 2017 . The Company’s prepaid sales compensation totaled approximately $17,000 and $19,500 , as of December 31, 2018 and December 31, 2017 , respectively. These amounts are included in homebuilding “Other assets” on the accompanying consolidated balance sheets. Deferred Revenue Topic 606 no longer requires sellers of real estate to consider the initial and continuing involvement criteria in ASC 360-20, but instead only conclude on the collectibility of the transaction price. On January 1, 2018, the Company recorded a cumulative-effect adjustment, net of tax, of $2,196 to recognize deferred profit on home settlements for which the Company had previously determined that there was significant continuing involvement and believed to be fully collectible. Revenue recognized in 2018 would not have been materially different under prior GAAP. Practical Expedients and Exemption At contract inception, the performance obligation to complete and settle the home with a customer has an expected duration of less than one year. As a result, the Company does not disclose the value of unsatisfied performance obligations for contracts. No other adjustments were made as a result of the adoption of Topic 606. Other recently adopted accounting pronouncements The Company adopted ASU 2016-15, Classification of Certain Cash Receipts and Cash Payments, effective January 1, 2018. In connection with the adoption of ASU 2016-15, the Company made the election to classify distributions received from unconsolidated joint ventures using the cumulative earnings approach. This election was applied retrospectively, which reclassified a portion of distributions received from the Company's unconsolidated joint ventures between operating and investing activities on the prior year consolidated statement of cash flows. The adoption of this standard did not have a material effect on the Company's consolidated statements of cash flows and related disclosures. The Company adopted ASU 2016-18, Statement of Cash Flows (Topic 230), Restricted Cash, effective January 1, 2018. The amendments in the standard require that the statement of cash flows explain the change during the period in the total of cash, cash equivalents and restricted cash or restricted cash equivalents. As a result, the Company's beginning-of-period and end-of-period cash balances presented in the consolidated statements of cash flows were retrospectively adjusted to include restricted cash with cash and cash equivalents. The beginning-of-period and end-of-period cash, restricted cash, and cash equivalent balances presented on the accompanying consolidated statements of cash flows include cash related to a consolidated joint venture, which is included in homebuilding "Other assets" on the Company's consolidated balance sheets. The cash related to this consolidated joint venture as of December 31, 2018 , 2017 and 2016 was $320 , $1,069 and $1,214 , respectively. The adoption of this standard did not have a material effect on the Company's consolidated statements of cash flows and related disclosures. Recently Issued Accounting Pronouncements In February 2016, FASB issued ASU 2016-02, Leases (Topic 842) , which requires lessees to recognize most leases on-balance sheet with a liability equal to the present value of lease payments over the lease term and a right-of-use asset for the right to use the underlying asset over the lease term. Lessees will recognize expenses on their income statements in a manner similar to current GAAP. The standard also requires additional disclosures of key information about leasing arrangements. The standard was effective for the Company as of January 1, 2019. Based on its current portfolio of leases, the Company expects that the adoption of this standard will result in the recognition of less than $100,000 of right-of-use assets and corresponding liabilities on its balance sheet, predominately related to real estate leases. Additionally, in July 2018 the FASB issued ASU 2018-11, Leases (Topic 842): Targeted Improvements , which provides companies with relief from the costs of implementing certain aspects of the new lease standard. The ASU amends Topic 842 so that entities may elect not to restate their comparative periods during transition. Previously, the new lease standard required that an entity apply the new rules beginning with the earliest comparative period of financial statements presented (the modified retrospective approach). The Company has elected to use the transition relief provided under Topic 842 upon adoption of the standard effective January 1, 2019. In June 2016, FASB issued ASU 2016-13, Financial Instruments – Credit Losses (Topic 326) , which significantly changes the way impairment of financial assets is recognized. The standard will require immediate recognition of estimated credit losses expected to occur over the remaining life of many financial assets, which will generally result in earlier recognition of allowances for credit losses on loans and other financial instruments. The standard’s provisions will be applied as a cumulative-effect adjustment to beginning retained earnings as of the effective date. The standard is effective for the Company as of January 1, 2020. The Company does not believe that the adoption of this standard will have a material effect on its consolidated financial statements and related disclosures. In January 2017, FASB issued ASU 2017-04, Intangibles – Goodwill and Other (Topic 350), Simplifying the Test for Goodwill Impairment . The standard’s objective is to simplify the subsequent measurement of goodwill by eliminating the second step from the goodwill impairment test. Under the amendments in the standard, an entity would perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. If the carrying amount of a reporting unit exceeds its fair value, an impairment charge would then be recognized, not to exceed the amount of goodwill allocated to that reporting unit. The standard is effective for the Company on January 1, 2020, and early adoption is permitted. The Company does not believe that the adoption of this standard will have a material effect on its consolidated financial statements and related disclosures.

Segment Information, Nature of

Segment Information, Nature of Operations, and Certain Concentrations	12 Months Ended
	Dec. 31, 2018
Segment Reporting [Abstract]
Segment Information, Nature of Operations, and Certain Concentrations	Segment Information, Nature of Operations, and Certain Concentrations NVR’s homebuilding operations primarily construct and sell single-family detached homes, townhomes and condominium buildings under three trade names: Ryan Homes, NVHomes and Heartland Homes. The Ryan Homes product is marketed primarily to first-time and first-time move-up buyers. Ryan Homes operates in thirty-two metropolitan areas located in Maryland, Virginia, Washington, D.C., West Virginia, Pennsylvania, New York, North Carolina, South Carolina, Florida, Ohio, New Jersey, Delaware, Indiana, Illinois and Tennessee. The NVHomes and Heartland Homes products are marketed primarily to move-up and luxury buyers. NVHomes operates in Delaware and the Washington, D.C., Baltimore, MD and Philadelphia, PA metropolitan areas. Heartland Homes operates in the Pittsburgh, PA metropolitan area. NVR derived approximately 30% and 10% of its 2018 homebuilding revenues from the Washington, D.C. and Baltimore, MD metropolitan areas, respectively. NVR’s mortgage banking segment is a regional mortgage banking operation. Substantially all of the mortgage banking segment’s loan closing activity is for NVR’s homebuilding customers. NVR’s mortgage banking business generates revenues primarily from origination fees, gains on sales of loans, and title fees. A substantial portion of the Company’s mortgage operations is conducted in the Washington, D.C. and Baltimore, MD metropolitan areas. The following disclosure includes four homebuilding reportable segments that aggregate geographically the Company’s homebuilding operating segments, and the mortgage banking operations presented as a single reportable segment. The homebuilding reportable segments are comprised of operating divisions in the following geographic areas: Mid Atlantic: Maryland, Virginia, West Virginia, Delaware and Washington, D.C. North East: New Jersey and Eastern Pennsylvania Mid East: New York, Ohio, Western Pennsylvania, Indiana and Illinois South East: North Carolina, South Carolina, Florida and Tennessee Homebuilding profit before tax includes all revenues and income generated from the sale of homes, less the cost of homes sold, selling, general and administrative expenses, and a corporate capital allocation charge. The corporate capital allocation charge is eliminated in consolidation and is based on the segment’s average net assets employed. The corporate capital allocation charged to the operating segment allows the Chief Operating Decision Maker (“CODM”) to determine whether the operating segment’s results are providing the desired rate of return after covering the Company’s cost of capital. In addition, certain assets including goodwill and intangible assets, and consolidation adjustments as discussed further below, are not allocated to the operating segments as those assets are neither included in the operating segment’s corporate capital allocation charge, nor in the CODM’s evaluation of the operating segment’s performance. The Company records charges on contract land deposits when it is determined that it is probable that recovery of the deposit is impaired. For segment reporting purposes, impairments on contract land deposits are charged to the operating segment upon the termination of a Lot Purchase Agreement with the developer, or the restructuring of a Lot Purchase Agreement resulting in the forfeiture of the deposit. Mortgage banking profit before tax consists of revenues generated from mortgage financing, title insurance and closing services, less the costs of such services and general and administrative costs. Mortgage banking operations are not charged a corporate capital allocation charge. In addition to the corporate capital allocation and contract land deposit impairments discussed above, the other reconciling items between segment profit and consolidated profit before tax include unallocated corporate overhead (including all management incentive compensation), equity-based compensation expense, consolidation adjustments and external corporate interest expense. NVR’s overhead functions, such as accounting, treasury and human resources are centrally performed and the costs are not allocated to the Company’s operating segments. Consolidation adjustments consist of such items necessary to convert the reportable segments’ results, which are predominantly maintained on a cash basis, to a full accrual basis for external financial statement presentation purposes, and are not allocated to the Company’s operating segments. External corporate interest expense primarily consists of interest charges on the Company’s 3.95% Senior Notes due 2022 (the “Senior Notes”) and is not charged to the operating segments because the charges are included in the corporate capital allocation discussed above. Following are tables presenting segment revenues, profit before taxes, assets, interest income, interest expense, depreciation and amortization and expenditures for property and equipment, with reconciliations to the amounts reported for the consolidated enterprise, where applicable: Year Ended December 31, 2018 2017 2016 Revenues: Homebuilding Mid Atlantic $ 3,893,358 $ 3,543,687 $ 3,319,776 Homebuilding North East 580,726 517,141 462,385 Homebuilding Mid East 1,455,834 1,250,165 1,192,472 Homebuilding South East 1,074,386 864,528 734,590 Mortgage Banking 159,370 130,319 113,321 Consolidated revenues $ 7,163,674 $ 6,305,840 $ 5,822,544 Year Ended December 31, 2018 2017 2016 Profit before taxes: Homebuilding Mid Atlantic $ 462,178 $ 398,494 $ 301,173 Homebuilding North East 69,789 60,218 21,947 Homebuilding Mid East 175,134 149,639 121,166 Homebuilding South East 118,296 95,826 71,098 Mortgage Banking 93,462 73,959 63,711 Total segment profit 918,859 778,136 579,095 Reconciling items: Contract land deposit reserve adjustment (1) 783 1,307 10,933 Equity-based compensation expense (2) (75,701 ) (44,562 ) (43,598 ) Corporate capital allocation (3) 213,903 198,384 189,992 Unallocated corporate overhead (89,973 ) (89,514 ) (89,376 ) Consolidation adjustments and other 15,829 26,143 35,204 Corporate interest expense (23,968 ) (22,983 ) (20,553 ) Reconciling items sub-total 40,873 68,775 82,602 Consolidated profit before taxes $ 959,732 $ 846,911 $ 661,697 (1) This item represents changes to the contract land deposit impairment reserve, which are not allocated to the reportable segments. (2) The increase in equity-based compensation expense for the year ended December 31, 2018 was primarily attributable to the issuance of Options and RSUs in the second quarter of 2018. See Note 12 for additional discussion of equity-based compensation. (3) This item represents the elimination of the corporate capital allocation charge included in the respective homebuilding reportable segments. The corporate capital allocation charge is based on the segment’s monthly average asset balance, and was as follows for the years presented: Year Ended December 31, 2018 2017 2016 Corporate capital allocation charge: Homebuilding Mid Atlantic $ 123,855 $ 123,028 $ 119,758 Homebuilding North East 17,893 16,115 18,132 Homebuilding Mid East 35,803 29,663 28,303 Homebuilding South East 36,352 29,578 23,799 Total corporate capital allocation charge $ 213,903 $ 198,384 $ 189,992 As of December 31, 2018 2017 Assets: Homebuilding Mid Atlantic $ 1,018,953 $ 1,079,225 Homebuilding North East 144,412 143,008 Homebuilding Mid East 290,815 263,019 Homebuilding South East 332,468 277,705 Mortgage Banking 517,075 397,052 Total segment assets 2,303,723 2,160,009 Reconciling items: Cash and cash equivalents 688,783 645,087 Deferred taxes 112,333 111,953 Intangible assets and goodwill 49,989 50,144 Contract land deposit reserve (29,216 ) (29,999 ) Consolidation adjustments and other 40,321 52,085 Reconciling items sub-total 862,210 829,270 Consolidated assets $ 3,165,933 $ 2,989,279 Year Ended December 31, 2018 2017 2016 Interest income: Mortgage Banking $ 11,593 $ 7,850 $ 7,569 Total segment interest income 11,593 7,850 7,569 Other unallocated interest income 8,588 4,554 1,111 Consolidated interest income $ 20,181 $ 12,404 $ 8,680 Year Ended December 31, 2018 2017 2016 Interest expense: Homebuilding Mid Atlantic $ 123,908 $ 123,075 $ 119,808 Homebuilding North East 17,897 16,117 18,141 Homebuilding Mid East 35,804 29,663 28,307 Homebuilding South East 36,362 29,583 23,804 Mortgage Banking 1,045 1,148 1,086 Total segment interest expense 215,016 199,586 191,146 Corporate capital allocation (3) (213,903 ) (198,384 ) (189,992 ) Senior Notes and other interest 23,968 22,983 20,553 Consolidated interest expense $ 25,081 $ 24,185 $ 21,707 Year Ended December 31, 2018 2017 2016 Depreciation and amortization: Homebuilding Mid Atlantic $ 7,753 $ 8,095 $ 8,089 Homebuilding North East 1,600 2,034 2,053 Homebuilding Mid East 3,481 3,590 3,748 Homebuilding South East 2,523 2,531 2,276 Mortgage Banking 1,489 1,297 1,117 Total segment depreciation and amortization 16,846 17,547 17,283 Unallocated corporate 3,322 5,120 4,986 Consolidated depreciation and amortization $ 20,168 $ 22,667 $ 22,269 Year Ended December 31, 2018 2017 2016 Expenditures for property and equipment: Homebuilding Mid Atlantic $ 6,657 $ 9,257 $ 8,838 Homebuilding North East 1,074 1,299 3,423 Homebuilding Mid East 4,302 3,117 4,027 Homebuilding South East 2,732 3,313 3,594 Mortgage Banking 1,677 2,723 726 Total segment expenditures for property and equipment 16,442 19,709 20,608 Unallocated corporate 3,223 560 1,761 Consolidated expenditures for property and equipment $ 19,665 $ 20,269 $ 22,369

Variable Interest Entities

Variable Interest Entities	12 Months Ended
	Dec. 31, 2018
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure [Abstract]
Variable Interest Entities	Variable Interest Entities Lot Purchase Agreements NVR generally does not engage in the land development business. Instead, the Company typically acquires finished building lots at market prices from various development entities under Lot Purchase Agreements. The Lot Purchase Agreements require deposits that may be forfeited if NVR fails to perform under the Lot Purchase Agreements. The deposits required under the Lot Purchase Agreements are in the form of cash or letters of credit in varying amounts, and typically range up to 10% of the aggregate purchase price of the finished lots. NVR believes this lot acquisition strategy reduces the financial requirements and risks associated with direct land ownership and land development. NVR may, at its option, choose for any reason and at any time not to perform under these Lot Purchase Agreements by delivering notice of its intent not to acquire the finished lots under contract. NVR’s sole legal obligation and economic loss for failure to perform under these Lot Purchase Agreements is limited to the amount of the deposit pursuant to the liquidated damage provisions contained within the Lot Purchase Agreements. In other words, if NVR does not perform under a Lot Purchase Agreement, NVR loses only its deposit. None of the creditors of any of the development entities with which NVR enters Lot Purchase Agreements have recourse to the general credit of NVR. NVR generally does not have any specific performance obligations to purchase a certain number or any of the lots, nor does NVR guarantee completion of the development by the developer or guarantee any of the developers’ financial or other liabilities. NVR is not involved in the design or creation of the development entities from which the Company purchases lots under Lot Purchase Agreements. The developer’s equity holders have the power to direct 100% of the operating activities of the development entity. NVR has no voting rights in any of the development entities. The sole purpose of the development entity’s activities is to generate positive cash flow returns for the equity holders. Further, NVR does not share in any of the profit or loss generated by the project’s development. The profits and losses are passed directly to the developer’s equity holders. The deposit placed by NVR pursuant to the Lot Purchase Agreement is deemed to be a variable interest in the respective development entities. Those development entities are deemed to be variable interest entities (“VIE”). Therefore, the development entities with which NVR enters into Lot Purchase Agreements, including the joint venture limited liability corporations, discussed below, are evaluated for possible consolidation by NVR. An enterprise must consolidate a VIE when that enterprise has a controlling financial interest in the VIE. An enterprise is deemed to have a controlling financial interest if it has i) the power to direct the activities of a VIE that most significantly impact the entity’s economic performance, and ii) the obligation to absorb losses of the VIE that could be significant to the VIE or the rights to receive benefits from the VIE that could be significant to the VIE. NVR believes the activities that most significantly impact a development entity’s economic performance are the operating activities of the entity. Unless and until a development entity completes finished building lots through the development process to be able to sell, the process of which the development entity’s equity investors bear the full risk, the entity does not earn any revenues. The operating development activities are managed solely by the development entity’s equity investors. The development entities with which NVR contracts to buy finished lots typically select the respective projects, obtain the necessary zoning approvals, obtain the financing required with no support or guarantees from NVR, select who will purchase the finished lots and at what price, and manage the completion of the infrastructure improvements, all for the purpose of generating a cash flow return to the development entity’s equity holders and all independent of NVR. The Company possesses no more than limited protective legal rights through the Lot Purchase Agreement in the specific finished lots that it is purchasing, and NVR possesses no participative rights in the development entities. Accordingly, NVR does not have the power to direct the activities of a developer that most significantly impact the developer’s economic performance. For this reason, NVR has concluded that it is not the primary beneficiary of the development entities with which the Company enters into Lot Purchase Agreements, and therefore NVR does not consolidate any of these VIEs. As of December 31, 2018 , NVR controlled approximately 95,750 lots under Lot Purchase Agreements with third parties through deposits in cash and letters of credit totaling approximately $420,900 and $3,800 , respectively. As noted above, NVR’s sole legal obligation and economic loss for failure to perform under these Lot Purchase Agreements is limited to the amount of the deposit pursuant to the liquidated damage provisions contained in the Lot Purchase Agreements and, in very limited circumstances, specific performance obligations. In addition, NVR has certain properties under contract with land owners that are expected to yield approximately 7,500 lots, which are not included in the number of total lots controlled. Some of these properties may require rezoning or other approvals to achieve the expected yield. These properties are controlled with deposits in cash and letters of credit totaling approximately $4,500 and $150 , respectively, as of December 31, 2018 , of which approximately $1,700 is refundable if NVR does not perform under the contract. NVR generally expects to assign the raw land contracts to a land developer and simultaneously enter into a Lot Purchase Agreement with the assignee if the project is determined to be feasible. NVR’s total risk of loss related to contract land deposits as of December 31, 2018 and 2017 was as follows: December 31, 2018 2017 Contract land deposits $ 425,393 $ 400,428 Loss reserve on contract land deposits (29,216 ) (29,999 ) Contract land deposits, net 396,177 370,429 Contingent obligations in the form of letters of credit 3,923 1,996 Contingent specific performance obligations (1) 1,505 1,505 Total risk of loss $ 401,605 $ 373,930 (1) As of both December 31, 2018 and 2017 , the Company was committed to purchase 10 finished lots under specific performance obligations.

Joint Ventures

Joint Ventures	12 Months Ended
	Dec. 31, 2018
Equity Method Investments and Joint Ventures [Abstract]
Joint Ventures	Joint Ventures On a limited basis, NVR obtains finished lots using joint venture limited liability corporations (“JVs”). The JVs are typically structured such that NVR is a non-controlling member and is at risk only for the amount the Company has invested, or committed to invest, in addition to any deposits placed under Lot Purchase Agreements with the joint venture. NVR is not a borrower, guarantor or obligor on any debt of the JVs, as applicable. The Company enters into a standard Lot Purchase Agreement to purchase lots from these JVs, and as a result has a variable interest in these JVs. During 2018 , the Company recognized an impairment of approximately $7,400 , including approximately $760 of capitalized interest, related to one of these JVs. The charge was recorded to homebuilding "Cost of sales" on the accompanying consolidated statements of income. None of the other JVs had any indicators of impairment during 2018. At December 31, 2018 , the Company had an aggregate investment totaling approximately $29,400 in six JVs that are expected to produce approximately 6,800 finished lots, of which approximately 3,450 lots were controlled by the Company and the remaining approximately 3,350 lots were either under contract with unrelated parties or not currently under contract. In addition, NVR had additional funding commitments in the aggregate totaling $5,000 to three of the JVs at December 31, 2018 . The Company has determined that it is not the primary beneficiary of five of the JVs because NVR and the other JV partner either share power or the other JV partner has the controlling financial interest. The aggregate investment in unconsolidated JVs was approximately $29,400 and $45,200 at December 31, 2018 and 2017 , respectively, and is reported in the “Other assets” line item on the accompanying consolidated balance sheets. For the remaining JV, NVR has concluded that it is the primary beneficiary because the Company has the controlling financial interest in the JV. The condensed balance sheets of the consolidated JV at December 31, 2018 and 2017 were as follows: December 31, 2018 2017 Assets: Cash $ 320 $ 1,069 Other assets — 37 Total assets $ 320 $ 1,106 Liabilities and equity: Accrued expenses $ 282 $ 487 Equity 38 619 Total liabilities and equity $ 320 $ 1,106 At December 31, 2017 , the Company had an aggregate investment totaling approximately $45,500 in six JVs that were expected to produce approximately 7,300 finished lots, of which approximately 3,900 lots were controlled by the Company and the remaining approximately 3,400 lots were either under contract with unrelated parties or not currently under contract. In addition, at December 31, 2017 , NVR had additional funding commitments in the aggregate totaling $5,300 to three of the JVs. With the Company's adoption of ASU 2016-15 effective January 1, 2018, the Company made the election to classify distributions received from unconsolidated JVs using the cumulative earnings approach. As a result, distributions received up to the amount of cumulative earnings recognized by the Company are reported as distributions of earnings and those in excess of that amount are reported as a distribution of capital. These distributions are classified within the accompanying consolidated statements of cash flows as cash flows from operating activities and investing activities, respectively. See Note 1 for additional discussion regarding the Company's adoption of ASU 2016-15.

Land Under Development

Land Under Development	12 Months Ended
	Dec. 31, 2018
Real Estate [Abstract]
Land Under Development	Land Under Development On a limited basis, NVR directly acquires raw land parcels already zoned for its intended use to develop into finished lots. Land under development includes the land acquisition costs, direct improvement costs, capitalized interest where applicable, and real estate taxes. As of December 31, 2018 , NVR directly owned three separate raw parcels of land with a carrying value of $38,857 that it intends to develop into approximately 500 finished lots primarily for use in its homebuilding operations. The Company also has additional funding commitments of approximately $7,300 under a joint development agreement related to one parcel, a portion of which the Company expects will be offset by development credits of approximately $4,600 . None of the raw parcels had any indicators of impairment as of December 31, 2018 . As of December 31, 2017 , NVR directly owned four separate raw parcels of land with a carrying value of $34,212 , which were expected to produce approximately 500 finished lots.

Capitalized Interest

Capitalized Interest	12 Months Ended
	Dec. 31, 2018
Capitalized Interest Costs, Including Allowance for Funds Used During Construction [Abstract]
Capitalized Interest	Capitalized Interest The Company capitalizes interest costs to land under development during the active development of finished lots. In addition, the Company capitalizes interest costs to its joint venture investments while the investments are considered qualified assets pursuant to ASC 835-20, Interest . Capitalized interest is transferred to sold or unsold inventory as the development of finished lots is completed, then charged to cost of sales upon the Company’s settlement of homes and the respective lots. Interest incurred in excess of the interest capitalizable based on the level of qualified assets is expensed in the period incurred. NVR’s interest costs incurred, capitalized, expensed and charged to cost of sales during the years ended December 31, 2018 , 2017 and 2016 was as follows: December 31, 2018 2017 2016 Interest capitalized, beginning of year $ 5,583 $ 5,106 $ 4,434 Interest incurred 26,277 26,384 25,951 Interest charged to interest expense (25,081 ) (24,185 ) (21,707 ) Interest charged to cost of sales (2,625 ) (1,722 ) (3,572 ) Interest capitalized, end of year $ 4,154 $ 5,583 $ 5,106

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2018
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions During the year ended December 31, 2018 , NVR entered into Lot Purchase Agreements to purchase finished building lots for a total purchase price of approximately $121,700 with Elm Street Development, Inc. (“Elm Street”), which is controlled by one of the Company’s directors, William Moran. The independent members of the Company’s Board of Directors approved these transactions. During 2018 , 2017 and 2016 , NVR purchased developed lots at market prices from Elm Street for approximately $36,100 , $37,100 and $44,500 , respectively. The Company also continues to control a parcel of raw land expected to yield approximately 2,300 finished lots through a JV entered into with Elm Street during 2009. NVR did not make any investments in the JV in 2018 . During 2017, NVR and Elm Street each made an additional investment of $2,900 in the JV. Further, during 2016 , the Company paid Elm Street $143 to manage the development of a property that the Company purchased from Elm Street in 2010. No management fees were paid to Elm Street in 2018 or 2017 related to this property.

Property, Plant and Equipment (

Property, Plant and Equipment ("PP&E")	12 Months Ended
	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment ("PP&E")	Property, Plant and Equipment (“PP&E”) December 31, 2018 2017 Homebuilding: Office facilities and other $ 37,789 $ 35,219 Model home furniture and fixtures 31,593 33,901 Production facilities 64,667 61,348 Gross Homebuilding PP&E 134,049 130,468 Less: accumulated depreciation (91,815 ) (87,277 ) Net Homebuilding PP&E $ 42,234 $ 43,191 Mortgage Banking: Office facilities and other $ 13,724 $ 14,069 Less: accumulated depreciation (7,214 ) (7,742 ) Net Mortgage Banking PP&E $ 6,510 $ 6,327

Debt

Debt	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Debt	Debt Senior Notes On September 10, 2012 , NVR completed an offering for $600,000 of Senior Notes under a shelf registration statement filed on September 5, 2012 with the Securities and Exchange Commission. The Senior Notes were issued at a discount to yield 3.97% and have been reflected net of the unamortized discount in the accompanying consolidated balance sheet. The offering of the Senior Notes resulted in aggregate net proceeds of approximately $593,900 , after deducting underwriting discounts and other offering expenses. The Senior Notes mature on September 15, 2022 and bear interest at 3.95% , payable semi-annually in arrears on March 15 and September 15 . The Senior Notes have been reflected net of unamortized debt issuance costs of $1,886 and $2,395 as of December 31, 2018 and 2017 , respectively. The Senior Notes are senior unsecured obligations and rank equally in right of payment with any of NVR’s existing and future unsecured senior indebtedness, will rank senior in right of payment to any of NVR’s future indebtedness that is by its terms expressly subordinated to the Senior Notes and will be effectively subordinated to any of NVR’s existing and future secured indebtedness to the extent of the value of the collateral securing such indebtedness. The indenture governing the Senior Notes has, among other items, and subject to certain exceptions, covenants that restrict the Company’s ability to create, incur, assume or guarantee secured debt, enter into sale and leaseback transactions and conditions related to mergers and/or the sale of assets. Credit Agreement On July 15, 2016, NVR entered into an unsecured Credit Agreement (the “Credit Agreement”) with Bank of America, N.A., as Administrative Agent, Swing Line Lender and L/C Issuer, Merrill Lynch, Pierce, Fenner & Smith Incorporated as Sole Lead Arranger and Sole Book Runner, and the other lenders party thereto, which provides for aggregate revolving loan commitments of $200,000 (the “Facility”). Proceeds of the borrowings under the Facility will be used for working capital and general corporate purposes. Under the Credit Agreement, the Company may request increases of up to $300,000 to the Facility in the form of revolving loan commitments or term loans to the extent that new or existing lenders agree to provide additional revolving loan or term loan commitments. The Credit Agreement provides for a $100,000 sublimit for the issuance of letters of credit of which approximately $9,000 was outstanding at December 31, 2018 , and a $25,000 sublimit for a swing line commitment. Borrowings under the Credit Agreement generally bear interest for Base Rate Loans at a Base Rate equal to the highest of (i) a Federal Funds Rate plus one-half of one percent, (ii) Bank of America’s publicly announced “prime rate,” and (iii) the Eurodollar Rate plus one percent, plus the Applicable Rate which is based on the Company’s debt rating, or for Eurodollar Rate Loans, at the Eurodollar Rate equal to LIBOR plus the Applicable Rate. The Credit Agreement contains various representations and affirmative and negative covenants that are generally customary for credit facilities of this type. Such covenants include, among others, the following financial maintenance covenants: (i) minimum consolidated tangible net worth, (ii) minimum interest coverage ratio or minimum liquidity and (iii) a maximum leverage ratio. The negative covenants include, among others, certain limitations on liens, investments and fundamental changes. The Credit Agreement termination date is July 15, 2021 . The Company was in compliance with all covenants under the Credit Agreement at December 31, 2018 . There was no debt outstanding under the Facility at December 31, 2018 . Repurchase Agreement On July 25, 2018, NVRM entered into the Tenth Amendment (the “Amendment”) to its Amended and Restated Master Repurchase Agreement dated August 2, 2011 with U.S. Bank National Association (as amended by the Amendment and nine earlier amendments, the “Repurchase Agreement”). The purpose of the Repurchase Agreement is to finance the origination of mortgage loans by NVRM. The Repurchase Agreement provides for loan purchases up to $150,000 , subject to certain sub limits. Advances under the Repurchase Agreement carry a Pricing Rate based on the LIBOR Rate plus the LIBOR Margin, as determined under the Repurchase Agreement, provided that the Pricing Rate shall not be less than 1.95% . The Pricing Rate at December 31, 2018 was 4.513% . There are several restrictions on purchased loans, including that they cannot be sold to others, they cannot be pledged to anyone other than the agent, and they cannot support any other borrowing or repurchase agreement. Amounts outstanding under the Repurchase Agreement are collateralized by the Company’s mortgage loans held for sale. At December 31, 2018 , there were no borrowing base limitations reducing the amount available under the Repurchase Agreement. As of both December 31, 2018 and 2017 , there was no debt outstanding under the Repurchase Agreement. The Repurchase Agreement expires on July 24, 2019 . The Repurchase Agreement contains various affirmative and negative covenants. The negative covenants include, among others, certain limitations on transactions involving acquisitions, mergers, the incurrence of debt, sale of assets and creation of liens upon any of its Mortgage Notes. Additional covenants include (i) a tangible net worth requirement, (ii) a minimum liquidity requirement, (iii) a minimum net income requirement, and (iv) a maximum leverage ratio requirement. The Company was in compliance with all covenants under the Repurchase Agreement at December 31, 2018 .

Common Stock

Common Stock	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
Common Stock	Common Stock There were approximately 3,578 and 3,691 common shares outstanding at December 31, 2018 and 2017 , respectively. The Company made the following share repurchases during the years indicated: Year Ended December 31, 2018 2017 2016 Aggregate purchase price $ 846,134 $ 422,166 $ 455,351 Number of shares repurchased 301 167 280 The Company issues shares from the treasury account for all equity plan activity. The Company issued 188 , 165 and 83 such shares during 2018 , 2017 and 2016 , respectively.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The provision for income taxes consists of the following: Year Ended December 31, 2018 2017 2016 Current: Federal $ 126,358 $ 211,641 $ 209,454 State 37,038 37,006 38,095 Deferred: Federal 138 60,785 (9,230 ) State (999 ) (42 ) (1,884 ) Income tax expense $ 162,535 $ 309,390 $ 236,435 Deferred income taxes on NVR’s consolidated balance sheets were comprised of the following: December 31, 2018 2017 Deferred tax assets: Other accrued expenses and contract land deposit reserve $ 51,316 $ 49,063 Deferred compensation 4,693 4,743 Equity-based compensation expense 40,744 36,799 Inventory 9,242 9,393 Unrecognized tax benefit 13,587 14,351 Other 5,113 9,681 Total deferred tax assets 124,695 124,030 Less: Deferred tax liabilities 6,091 4,511 Net deferred tax asset $ 118,604 $ 119,519 Deferred tax assets arise principally as a result of various accruals required for financial reporting purposes and equity-based compensation expense, which are not currently deductible for tax return purposes. Management believes that the Company will have sufficient future taxable income to make it more likely than not that the net deferred tax assets will be realized. Federal taxable income is estimated to be approximately $636,849 for the year ended December 31, 2018 , and was $621,587 for the year ended December 31, 2017 . A reconciliation of income taxes computed at the federal statutory rate ( 21% in 2018 and 35% in 2017 and 2016) to income tax expense is as follows: Year Ended December 31, 2018 2017 2016 Income taxes computed at the federal statutory rate $ 201,544 $ 296,419 $ 231,595 State income taxes, net of federal income tax benefit (1) 42,944 30,046 23,738 Excess tax benefits from equity-based compensation (2) (77,478 ) (58,681 ) — Remeasurement of net deferred tax assets due to enactment of Tax Cut and Jobs Act (3) (497 ) 62,702 — Other, net (4) (3,978 ) (21,096 ) (18,898 ) Income tax expense $ 162,535 $ 309,390 $ 236,435 (1) Excludes state excess tax benefits from equity-based compensation included in the line below. (2) ASU 2016-09 adopted January 1, 2017. Excess tax benefits related to equity-based compensation of $13,661 in 2016 were recorded to shareholders' equity. (3) The enactment of the Tax Cuts and Jobs Act in December 2017 required a remeasurement of the Company's net deferred tax assets and resulted in additional income tax expense of $62,702 . (4) Primarily attributable to tax benefits from certain energy credits for the year ended December 31, 2018. For the years ended December 31, 2017 and 2016, this was primarily attributable to tax benefits from the domestic production activities deduction. The domestic production activities deduction was eliminated effective January 1, 2018, following the enactment of the Tax Cuts and Jobs Act in December 2017. The Company’s effective tax rate in 2018 , 2017 and 2016 was 16.94% , 36.53% and 35.73% , respectively. The Company files a consolidated U.S. federal income tax return, as well as state and local tax returns in all jurisdictions where the Company maintains operations. With few exceptions, the Company is no longer subject to income tax examinations by tax authorities for years prior to 2015 . A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows: Year Ended December 31, 2018 2017 Balance at beginning of year $ 45,337 $ 46,110 Additions based on tax positions related to the current year 4,340 4,793 Reductions for tax positions of prior years (6,259 ) (5,566 ) Settlements — — Balance at end of year $ 43,418 $ 45,337 If recognized, the total amount of unrecognized tax benefits that would affect the effective tax rate (net of the federal tax benefit) is $34,300 as of December 31, 2018 . The Company recognizes interest related to unrecognized tax benefits as a component of income tax expense. For the years ended December 31, 2018 , 2017 , and 2016, the Company recognized a net reversal of accrued interest on unrecognized tax benefits in the amount of $1,384 , $1,065 and $1,582 , respectively. As of December 31, 2018 and 2017 , the Company had a total of $17,191 and $18,575 , respectively, of accrued interest on unrecognized tax benefits which are included in “Accrued expenses and other liabilities” on the accompanying consolidated balance sheets. Based on its historical experience in dealing with various taxing authorities, the Company has found that it is the administrative practice of these authorities to not seek penalties from the Company for the tax positions it has taken on its returns, related to its unrecognized tax benefits. Therefore, the Company does not accrue penalties for the positions in which it has an unrecognized tax benefit. However, if such penalties were to be accrued, they would be recorded as a component of income tax expense. The Company believes that within the next 12 months, it is reasonably possible that the unrecognized tax benefits as of December 31, 2018 will be reduced by approximately $11,570 due to statute expiration and effectively settled positions in various state jurisdictions.

Equity-Based Compensation, Prof

Equity-Based Compensation, Profit Sharing and Deferred Compensation Plans	12 Months Ended
	Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Equity-Based Compensation, Profit Sharing and Deferred Compensation Plans	Equity-Based Compensation, Profit Sharing and Deferred Compensation Plans Equity-Based Compensation Plans NVR’s equity-based compensation plans provide for the granting of Options and RSUs to key management employees, including executive officers and members of our Board of Directors ("Directors"), of the Company. The exercise price of Options granted is equal to the closing price of the Company’s common stock on the New York Stock Exchange (the “NYSE”) on the day prior to the date of grant. Options are granted for a ten -year term and typically vest in separate tranches over periods of 3 to 6 years. RSUs generally vest in separate tranches over periods of 2 to 6 years. Grants are generally divided such that vesting for 50% of the grant is contingent solely on continued employment or service as a Director, while vesting for the remaining 50% of the grant is contingent upon both continued employment or service as a Director and the achievement of a performance metric based on the Company’s return on capital performance relative to a peer group during a three year period specified on the date of Option grant. The following table provides a summary of each of the Company’s equity-based compensation plans for any plan with grants outstanding at December 31, 2018 : Equity-Based Compensation Plans Shares Authorized Options/RSUs Outstanding Shares Available to Issue 2000 Broadly-Based Stock Option Plan 2,000 63 — 2010 Equity Incentive Plan (1) 700 160 26 2014 Equity Incentive Plan (2) 950 701 102 2018 Equity Incentive Plan (3) 275 146 129 (1) During 2010, the Company’s shareholders approved the 2010 Equity Incentive Plan (the “2010 Plan”). The 2010 Plan authorizes the Company to issue Options and RSUs to key management employees, including executive officers and Directors. Of the 700 aggregate shares available to issue, up to 240 may be granted in the form of RSUs. There were 139 Options and 21 RSUs outstanding as of December 31, 2018 . Of the 26 shares available to be issued under the 2010 Plan, 22 may be granted as RSUs. (2) During 2014, the Company’s shareholders approved the 2014 Equity Incentive Plan (the “2014 Plan”). The 2014 Plan authorizes the Company to issue Options to key management employees, including executive officers and Directors. (3) The Company’s shareholders approved the 2018 Equity Incentive Plan (the "2018 Plan") at the Company’s Annual Meeting of Shareholders held on May 2, 2018. The 2018 Plan authorizes the Company to issue up to an aggregate of 275 shares of the Company’s common stock in the form of Options and RSUs to key management employees, including executive officers and Directors. Of the 275 aggregate shares available to issue, all may be granted in the form of Options and up to 40 may be granted in the form of RSUs. During 2018 , the Company issued 345 Options and 16 RSUs under the 2010 Plan, the 2014 Plan, and the 2018 Plan as follows: 2010 Plan 2014 Plan 2018 Plan Options Granted Options (4) 6 93 73 Performance-based Options (5) — 100 73 Total Options Granted 6 193 146 RSUs Granted RSUs (6) 8 — — Performance-based RSUs (7) 8 — — Total RSUs Granted 16 — — (4) Of the 172 service-only Options granted, 34 will generally vest over two years in 50% increments on December 31, 2020 and 2021; the remaining 138 Options will generally vest over four years in 25% increments on December 31, 2020, 2021, 2022, and 2023. Vesting for the Options is contingent solely upon continued employment or continued service as a Director. (5) Of the 173 performance-based Options granted, 34 will vest over two years in 50% increments on December 31, 2020 and 2021; the remaining 139 performance-based Options will generally vest over four years in 25% increments on December 31, 2020, 2021, 2022, and 2023. Vesting for the performance-based Options is contingent upon both continued employment or continued service as a Director and the Company's return on capital performance during 2018 through 2020. (6) The service-only RSUs granted will vest over two years in 50% increments on December 31, 2022 and 2023. Vesting for the RSUs is contingent solely upon continued employment. (7) The performance-based RSUs granted will vest over two years in 50% increments on December 31, 2022 and 2023. Vesting for the performance-based RSUs is contingent upon both continued employment and the Company's return on capital performance during 2018 through 2020. The following table provides additional information relative to NVR’s equity-based compensation plans for the year ended December 31, 2018 : Shares Weighted Avg. Per Share Exercise Price Weighted Avg. Remaining Contract Life (years) Aggregate Intrinsic Value Stock Options Outstanding at December 31, 2017 916 $ 1,119.92 Granted 345 3,013.61 Exercised (182 ) 954.49 Forfeited (30 ) 1,283.48 Outstanding at December 31, 2018 1,049 $ 1,766.87 6.5 $ 703,087 Exercisable at December 31, 2018 466 $ 1,032.44 4.6 $ 655,141 RSUs Outstanding at December 31, 2017 10 Granted 16 Vested (5 ) Forfeited — Outstanding at December 31, 2018 21 $ 50,719 Vested, but not issued at December 31, 2018 5 $ 11,532 To estimate the grant-date fair value of its Options, the Company uses the Black-Scholes option-pricing model (the “Pricing Model”). The Pricing Model estimates the per share fair value of an option on its date of grant based on the following factors: the option’s exercise price; the price of the underlying stock on the date of grant; the estimated dividend yield; a risk-free interest rate; the estimated option term; and the expected volatility. For the risk-free interest rate, the Company uses U.S. Treasury STRIPS which mature at approximately the same time as the option’s expected holding term. For expected volatility, NVR has concluded that its historical volatility over the option’s expected holding term provides the most reasonable basis for this estimate. The fair value of the Options granted during 2018 , 2017 and 2016 was estimated on the grant date using the Pricing Model, based on the following assumptions: 2018 2017 2016 Estimated option life (years) 5.06 5.26 5.27 Risk free interest rate (range) 2.19%-3.13% 1.53%-2.38% 0.86%-2.21% Expected volatility (range) 16.57%-20.05% 15.09%-17.95% 15.91%-23.49% Expected dividend rate — % — % — % Weighted average grant-date fair value per share of options granted $ 687.81 $ 494.17 $ 320.21 The weighted-average grant date fair value per share of $3,015.83 for the RSUs was the closing price of the Company’s common stock on the day immediately preceding the date of grant. Compensation cost for Options and RSUs is recognized on a straight-line basis over the requisite service period for the entire award (from the date of grant through the period of the last separately vesting portion of the grant). For the recognition of equity-based compensation, the Options and RSUs which are subject to a performance condition are treated as a separate award from the “service-only” Options and RSUs, and compensation expense is recognized when it becomes probable that the stated performance target will be achieved. The Company currently believes that it is probable that the stated performance condition will be satisfied at the target level and is recognizing compensation expense related to such Options and RSUs accordingly. Compensation cost is recognized within the income statement in the same expense line as the cash compensation paid to the respective employees. In connection with the adoption of ASU 2016-09 on January 1, 2017, the Company made the election to recognize forfeitures of equity-based awards as a reduction to compensation costs in the period in which they occur. For the year ended December 31, 2016, the Company estimated forfeitures based on its historical forfeiture rate. In 2018 , 2017 and 2016 , the Company recognized $75,701 , $44,562 , and $43,598 in equity-based compensation costs, respectively, and approximately $17,200 , $17,100 , and $17,000 in tax benefit related to equity-based compensation costs, respectively. As of December 31, 2018 , the total unrecognized compensation cost for all outstanding Options and RSUs equaled approximately $302,000 . The unrecognized compensation cost will be recognized over each grant’s applicable vesting period with the latest vesting date being December 31, 2024. The weighted-average period over which the unrecognized compensation will be recorded is equal to approximately 2.6 years. The Company settles Option exercises and vesting of RSUs by issuing shares of treasury stock. Shares are relieved from the treasury account based on the weighted average cost of treasury shares acquired. During the years ended December 31, 2018 , 2017 and 2016 , the Company issued 188 , 165 and 83 shares, respectively, from the treasury account for Option exercises and vesting of RSUs. Information with respect to the vested RSUs and exercised Options is as follows: Year Ended December 31, 2018 2017 2016 Aggregate exercise proceeds $ 174,110 $ 140,525 $ 38,106 Aggregate intrinsic value on exercise dates $ 355,318 $ 206,890 $ 96,600 Profit Sharing Plans NVR has a trustee-administered, profit sharing retirement plan (the “Profit Sharing Plan”) and an Employee Stock Ownership Plan (“ESOP”) covering substantially all employees. The Profit Sharing Plan and the ESOP provide for annual discretionary contributions in amounts as determined by the NVR Board of Directors. The combined plan contribution for the years ended December 31, 2018 , 2017 and 2016 was approximately $19,500 , $18,400 and $16,700 , respectively. The ESOP purchased approximately 7 and 6 shares of NVR common stock in the open market for the 2018 and 2017 plan year contributions, respectively, using cash contributions provided by the Company. As of December 31, 2018 , all shares held by the ESOP had been allocated to participants’ accounts. The 2018 plan year contribution was funded and fully allocated to participants in February 2019 . Deferred Compensation Plans The Company has two deferred compensation plans (“Deferred Comp Plans”). The specific purpose of the Deferred Comp Plans is to i) establish a vehicle whereby named executive officers may defer the receipt of salary and bonus that otherwise would be nondeductible for Company tax purposes into a period where the Company would realize a tax deduction for the amounts paid, and ii) to enable certain employees who are subject to the Company’s stock holding requirements to acquire shares of the Company’s common stock on a pre-tax basis in order to more quickly meet, and maintain compliance with those stock holding requirements. Amounts deferred into the Deferred Comp Plans are invested in NVR common stock, held in a rabbi trust account, and are paid out in a fixed number of shares upon expiration of the deferral period. The rabbi trust account held 107 and 109 shares of NVR common stock as of December 31, 2018 and 2017 , respectively. Shares held by the Deferred Comp Plans are treated as outstanding shares in the Company’s earnings per share calculation for each of the years ended December 31, 2018 , 2017 and 2016 .

Commitments and Contingent Liab

Commitments and Contingent Liabilities	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingent Liabilities	Commitments and Contingent Liabilities NVR is committed under multiple non-cancelable operating leases involving office space, model homes, production facilities, automobiles and equipment. Future minimum lease payments under these operating leases as of December 31, 2018 are as follows: Year Ending December 31, 2019 $ 31,564 2020 22,210 2021 17,331 2022 13,667 2023 10,324 Thereafter 12,607 107,703 Sublease income (25 ) $ 107,678 Total rent expense incurred under operating leases was approximately $52,900 , $49,400 and $45,800 for the years ended December 31, 2018 , 2017 and 2016 , respectively. The Company generally does not engage in the land development business. Instead, the Company typically acquires finished building lots at market prices from various development entities under Lot Purchase Agreements. The Lot Purchase Agreements require deposits that may be forfeited if the Company fails to perform under the agreement. The deposits required under the Lot Purchase Agreements are in the form of cash or letters of credit in varying amounts, and typically range up to 10% of the aggregate purchase price of the finished lots. At December 31, 2018 , assuming that contractual development milestones are met and the Company exercises its option, the Company expects to place additional forfeitable deposits with land developers under existing Lot Purchase Agreements of approximately $193,600 . The Company also has one specific performance contract pursuant to which the Company is committed to purchase 10 finished lots at an aggregate purchase price of approximately $1,505 . Additionally, as of December 31, 2018 , we had funding commitments totaling approximately $7,300 under a joint development agreement related to our land under development, a portion of which we expect will be offset by development credits of approximately $4,600 . During the ordinary course of operating the homebuilding and mortgage banking businesses, the Company is required to enter into bond or letter of credit arrangements with local municipalities, government agencies, or land developers to collateralize its obligations under various contracts. The Company had approximately $37,600 of contingent obligations under such agreements, including approximately $9,000 for letters of credit issued under the Credit Agreement as of December 31, 2018 . The Company believes it will fulfill its obligations under the related contracts and does not anticipate any material losses under these bonds or letters of credit. The following table reflects the changes in the Company’s warranty reserve (see Note 1 herein for further discussion of warranty/product liability reserves): Year Ended December 31, 2018 2017 2016 Warranty reserve, beginning of year $ 94,513 $ 93,895 $ 87,407 Provision 62,553 44,652 50,787 Payments (53,366 ) (44,034 ) (44,299 ) Warranty reserve, end of year $ 103,700 $ 94,513 $ 93,895 The Company and its subsidiaries are also involved in various other litigation arising in the ordinary course of business. In the opinion of management, and based on advice of legal counsel, this litigation is not expected to have a material adverse effect on the financial position, results of operations or cash flows of the Company. Legal costs incurred in connection with outstanding litigation are expensed as incurred.

Fair Value

Fair Value	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value	Fair Value GAAP assigns a fair value hierarchy to the inputs used to measure fair value. Level 1 inputs are quoted prices in active markets for identical assets and liabilities. Level 2 inputs are inputs other than quoted market prices that are observable for the asset or liability, either directly or indirectly. Level 3 inputs are unobservable inputs. Financial Instruments The estimated fair values of NVR’s Senior Notes as of December 31, 2018 and 2017 were $594,000 and $630,000 , respectively. The estimated fair value is based on recent market prices of similar transactions, which is classified as Level 2 within the fair value hierarchy. The carrying values at December 31, 2018 and 2017 were $597,681 and $597,066 , respectively. Except as otherwise noted below, NVR believes that insignificant differences exist between the carrying value and the fair value of its financial instruments, which consists primarily of cash equivalents, due to their short term nature. Derivative Instruments and Mortgage Loans Held for Sale In the normal course of business, NVRM, enters into contractual commitments to extend credit to buyers of single-family homes with fixed expiration dates. The commitments become effective when the borrowers “lock-in” a specified interest rate within time frames established by NVRM. All mortgagors are evaluated for credit worthiness prior to the extension of the commitment. Market risk arises if interest rates move adversely between the time of the “lock-in” of rates by the borrower and the sale date of the loan to a broker/dealer. To mitigate the effect of the interest rate risk inherent in providing rate lock commitments to borrowers, NVRM enters into optional or mandatory delivery forward sales contracts to sell whole loans and mortgage-backed securities to broker/dealers. The forward sales contracts lock-in an interest rate and price for the sale of loans similar to the specific rate lock commitments. NVRM does not engage in speculative or trading derivative activities. Both the rate lock commitments to borrowers and the forward sale contracts to broker/dealers are undesignated derivatives and, accordingly, are marked to fair value through earnings. At December 31, 2018 , there were contractual commitments to extend credit to borrowers aggregating $682,152 and open forward delivery contracts aggregating $1,089,923 , which hedge both the rate lock loan commitments and closed loans held for sale. The fair value of the Company’s rate lock commitments to borrowers and the related input levels includes, as applicable: i) the assumed gain/loss of the expected resultant loan sale (Level 2); ii) the effects of interest rate movements between the date of the rate lock and the balance sheet date (Level 2); and iii) the value of the servicing rights associated with the loan (Level 2). The assumed gain/loss considers the excess servicing to be received or buydown fees to be paid upon securitization of the loan. The excess servicing and buydown fees are calculated pursuant to contractual terms with investors. To calculate the effects of interest rate movements, NVRM utilizes applicable published mortgage-backed security prices, and multiplies the price movement between the rate lock date and the balance sheet date by the notional loan commitment amount. NVRM sells all of its loans on a servicing released basis, and receives a servicing released premium upon sale. Thus, the value of the servicing rights is included in the fair value measurement and is based upon contractual terms with investors and varies depending on the loan type. NVRM assumes a fallout rate when measuring the fair value of rate lock commitments. Fallout is defined as locked loan commitments for which NVRM does not close a mortgage loan and is based on historical experience. The fair value of NVRM’s forward sales contracts to broker/dealers solely considers the market price movement of the same type of security between the trade date and the balance sheet date (Level 2). The market price changes are multiplied by the notional amount of the forward sales contracts to measure the fair value. Mortgage loans held for sale are recorded at fair value when closed, and thereafter are carried at the lower of cost or fair value, net of deferred origination costs, until sold. Fair value is measured using Level 2 inputs. As of December 31, 2018 , the fair value of loans held for sale of $458,324 included on the accompanying consolidated balance sheet has been increased by $10,880 from the aggregate principal balance of $447,444 . As of December 31, 2017 , the fair value of loans held for sale of $352,489 were increased by $1,931 from the aggregate principal balance of $350,558 . The fair value measurement of NVRM's undesignated derivative instruments was as follows: As of December 31, 2018 2017 Rate lock commitments: Gross assets $ 13,831 $ 5,400 Gross liabilities 345 1,832 Net rate lock commitments $ 13,486 $ 3,568 Forward sales contracts: Gross assets $ 64 $ 992 Gross liabilities 10,121 667 Net forward sales contracts $ (10,057 ) $ 325 As of December 31, 2018 , the net rate lock commitments are reported in mortgage banking "Other assets" and the net forward sales contracts are reported in mortgage banking "Accrued expenses and other liabilities" on the accompanying consolidated balance sheets. As of December 31, 2017 , both the net rate lock commitments and the net forward sales contracts are reported in mortgage banking "Other assets." The fair value measurement as of December 31, 2018 was as follows: Notional or Principal Amount Assumed Gain/(Loss) From Loan Sale Interest Rate Movement Effect Servicing Rights Value Security Price Change Total Fair Value Measurement Gain/(Loss) Rate lock commitments $ 682,152 $ 1,360 $ 4,630 $ 7,496 $ — $ 13,486 Forward sales contracts $ 1,089,923 — — — (10,057 ) (10,057 ) Mortgages held for sale $ 447,444 1,267 3,637 5,976 — 10,880 Total fair value measurement $ 2,627 $ 8,267 $ 13,472 $ (10,057 ) $ 14,309 The total fair value measurement as of December 31, 2017 was $5,824 . For the years ended December 31, 2018 , and 2017 , NVRM recorded a fair value adjustment to income of $8,485 and $1,638 , respectively. For the year ended December 31, 2016 , NVRM recorded a fair value adjustment to expense of $3,147 . Unrealized gains/losses from the change in the fair value measurements are included in earnings as a component of mortgage banking fees in the accompanying consolidated statements of income. The fair value measurement will be impacted in the future by the change in the value of the servicing rights, interest rate movements, security price fluctuations, and the volume and product mix of NVRM’s closed loans and locked loan commitments.

Mortgage Repurchase Reserve

Mortgage Repurchase Reserve	12 Months Ended
	Dec. 31, 2018
Mortgage Repurchase Reserve [Abstract]
Mortgage Repurchase Reserve	Mortgage Repurchase Reserve During the years ended December 31, 2018 , 2017 and 2016 , the Company recognized pre-tax charges for loan losses related to mortgage loans sold of approximately $3,200 , $2,900 and $2,000 , respectively. Included in the Mortgage Banking segment’s “Accounts payable and other liabilities” line item on the accompanying consolidated balance sheets is a mortgage repurchase reserve equal to approximately $15,600 and $14,000 at December 31, 2018 and 2017 , respectively.

Quarterly Results (unaudited)

Quarterly Results (unaudited)	12 Months Ended
	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Quarterly Results (unaudited)	Quarterly Results (unaudited) The following table sets forth unaudited selected financial data and operating information on a quarterly basis for the years ended December 31, 2018 and 2017 . Year Ended December 31, 2018 4th Quarter 3rd Quarter 2nd Quarter 1st Quarter Revenues – homebuilding operations $ 1,954,403 $ 1,809,345 $ 1,750,463 $ 1,490,093 Gross profit – homebuilding operations $ 363,668 $ 336,696 $ 333,666 $ 278,147 Mortgage banking fees $ 40,145 $ 43,062 $ 36,842 $ 39,321 Net income $ 232,158 $ 195,816 $ 203,174 $ 166,049 Diluted earnings per share $ 58.57 $ 48.28 $ 49.05 $ 39.34 New orders (units) 3,841 4,302 4,964 5,174 Settlements (units) 5,186 4,754 4,611 3,896 Backlog, end of period (units) 8,365 9,710 10,162 9,809 Loans closed $ 1,356,430 $ 1,249,199 $ 1,214,101 $ 1,009,673 Year Ended December 31, 2017 4th Quarter 3rd Quarter 2nd Quarter 1st Quarter Revenues – homebuilding operations $ 1,781,494 $ 1,633,726 $ 1,512,714 $ 1,247,587 Gross profit – homebuilding operations $ 343,187 $ 325,755 $ 294,631 $ 221,570 Mortgage banking fees $ 34,842 $ 34,194 $ 31,778 $ 29,505 Net income $ 124,619 $ 162,102 $ 147,877 $ 102,923 Diluted earnings per share $ 28.88 $ 38.02 $ 35.19 $ 25.12 New orders (units) 4,306 4,200 4,678 4,424 Settlements (units) 4,630 4,158 3,917 3,256 Backlog, end of period (units) 8,531 8,855 8,813 8,052 Loans closed $ 1,229,695 $ 1,115,494 $ 1,041,613 $ 843,341

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2018
Significant Accounting Policies [Line Items]
Principles of Consolidation	Principles of Consolidation The accompanying consolidated financial statements include the accounts of NVR, Inc. and its subsidiaries (“NVR” or the “Company”) and certain other entities in which the Company is deemed to be the primary beneficiary (see Notes 3 and 4 herein for additional information). All significant intercompany transactions have been eliminated in consolidation.
Use of Estimates in the Preparation of Financial Statements	Use of Estimates in the Preparation of Financial Statements The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting periods. Management continually evaluates the estimates used to prepare the consolidated financial statements and updates those estimates as necessary. In general, the Company’s estimates are based on historical experience, on information from third party professionals, and other various assumptions that are believed to be reasonable under the facts and circumstances. Actual results could differ materially from those estimates made by management.
Cash and Cash Equivalents	Cash and Cash Equivalents Cash and cash equivalents include short-term investments with original maturities of three months or less. Homebuilding restricted cash was attributable to customer deposits for certain home sales. Mortgage banking restricted cash included amounts collected from customers for loans in process and closed mortgage loans held for sale.
Homebuilding Inventory	Homebuilding Inventory The carrying value of inventory is stated at the lower of cost or market value. Cost of lots and completed and uncompleted housing units represent the accumulated actual cost of the units. Field construction supervisors’ salaries and related direct overhead expenses are included in inventory costs. Interest costs are not capitalized into inventory, with the exception of land under development and joint venture investments, as applicable (see below). Upon settlement, the cost of the unit is expensed on a specific identification basis. Cost of building materials is determined on a first-in, first-out basis. Sold inventory is evaluated for impairment based on the contractual sales price compared to the total estimated cost to construct. Unsold inventory is evaluated for impairment by analyzing recent comparable sales prices within the applicable community compared to the costs incurred to date plus the expected costs to complete. Any calculated impairments are recorded immediately.
Contract Land Deposits	Contract Land Deposits The Company purchases finished lots under fixed price lot purchase agreements (“Lot Purchase Agreements”) that require deposits that may be forfeited if NVR fails to perform under the contract. The deposits are in the form of cash or letters of credit in varying amounts and represent a percentage of the aggregate purchase price of the finished lots. NVR maintains an allowance for losses on contract land deposits that reflects the Company’s judgment of the present loss exposure in the existing contract land deposit portfolio at the end of the reporting period. To analyze contract land deposit impairments, NVR conducts a loss contingency analysis each quarter. In addition to considering market and economic conditions, NVR assesses contract land deposit impairments on a community-by-community basis pursuant to the purchase contract terms, analyzing, as applicable, current sales absorption levels, recent sales’ direct profit, the dollar differential between the contractual purchase price and the current market price for lots, a developer’s financial stability, a developer’s financial ability or willingness to reduce lot prices to current market prices, if necessary, and the contract’s default status by either the Company or the developer along with an analysis of the expected outcome of any such default. NVR’s analysis is focused on whether the Company can sell houses at an acceptable margin and sales pace in a particular community in the current market with which the Company is faced. Because the Company does not own the finished lots on which the Company has placed a contract land deposit, if the above analysis leads to a determination that the Company cannot sell homes at an acceptable margin and sales pace at the current contractual lot price, the Company then determines whether it will elect to default under the contract, forfeit the deposit and terminate the contract, or whether the Company will attempt to restructure the lot purchase contract, which may require it to forfeit the deposit to obtain contract concessions from a developer. The Company also assesses whether impairment is present due to collectability issues resulting from a developer’s non-performance because of financial or other conditions.
Land Under Development	Land Under Development On a limited basis, NVR directly acquires raw parcels of land already zoned for its intended use to develop into finished lots. Land under development includes the land acquisition costs, direct improvement costs, capitalized interest, where applicable, and real estate taxes. Land under development, including the land under development held by the Company’s unconsolidated joint ventures and the related joint venture investments, is reviewed for potential write-downs when impairment indicators are present. In addition to considering market and economic conditions, the Company assesses land under development impairments on a community-by-community basis, analyzing, as applicable, current sales absorption levels, recent sales’ direct profit, and the dollar differential between the projected fully-developed cost of the lots and the current market price for lots. If indicators of impairment are present for a community, NVR performs an analysis to determine if the undiscounted cash flows estimated to be generated by those assets are less than their carrying amounts, and if so, impairment charges are required to be recorded in an amount by which the carrying amount of the assets exceeds the fair value of such assets. The Company’s determination of fair value is primarily based on discounting the estimated future cash flows at a rate commensurate with the inherent risks associated with the assets and related estimated cash flow streams. See Notes 4 and 5 for further discussion of land under development and joint venture investments, respectively.
Property, Plant, and Equipment	Property, Plant, and Equipment Property, plant, and equipment are carried at cost less accumulated depreciation and amortization. Depreciation is based on the estimated useful lives of the assets using the straight-line method. Model home furniture and fixtures are generally depreciated over a two -year period, office facilities and other equipment are depreciated over a period of three to ten years and production facilities are depreciated over periods of five to forty years.
Intangible Assets	Intangible Assets On December 31, 2012, the Company acquired substantially all of the assets of Heartland Homes, Inc., which resulted in the Company recording finite-lived intangible assets and goodwill. The Company completed its annual assessment for impairment of goodwill and management determined that there was no impairment. As of December 31, 2018 and 2017 , finite-lived intangible assets, net of accumulated amortization, totaled $621 and $776 , respectively. The remaining finite-lived intangible assets will be amortized on a straight-line basis over 4 years. As of both December 31, 2018 and 2017 , the goodwill value was $441 . Finite-lived intangible assets and goodwill are included in homebuilding "Other assets" in the accompanying consolidated balance sheets.
Warranty/Product Liability Reserves	Warranty/Product Liability Reserves The Company establishes warranty and product liability reserves to provide for estimated future expenses as a result of construction and product defects, product recalls and litigation incidental to NVR’s homebuilding business. Liability estimates are determined based on management’s judgment considering such factors as historical experience, the likely current cost of corrective action, manufacturers’ and subcontractors’ participation in sharing the cost of corrective action, consultations with third party experts such as engineers, and discussions with the Company’s General Counsel and outside counsel retained to handle specific product liability cases.
Mortgage Loans Held for Sale, Derivatives and Hedging Activities	Mortgage Repurchase Reserve, Mortgage Loans Held for Sale and Derivatives and Hedging Activities NVR originates several different loan products to its customers to finance the purchase of a home through its wholly-owned mortgage subsidiary, NVR Mortgage Finance, Inc. (“NVRM”). NVRM sells all of the loans it originates into the secondary market on a servicing released basis, typically within 30 days from closing. All of the loans that NVRM originates are underwritten to the standards and specifications of the ultimate investor. Those underwriting standards are typically equal to or more stringent than the underwriting standards required by Fannie Mae (“FNMA”), Freddie Mac ("FHLMC"), the Department of Veterans Affairs (“VA”) and the Federal Housing Administration (“FHA”). Insofar as NVRM underwrites its originated loans to those standards, NVRM bears no increased concentration of credit risk from the issuance of loans, except in certain limited instances where early payment default occurs. NVRM employs a quality control department to ensure that its underwriting controls are effectively operating, and further assesses the underwriting function as part of its assessment of internal controls over financial reporting. NVRM maintains a reserve for losses on mortgage loans originated that reflects NVR’s judgment of the present loss exposure in the loans that NVRM has originated and sold. The reserve is calculated based on an analysis of historical experience and exposure (see Note 15 herein for further information). Mortgage loans held for sale are recorded at fair value when closed, and thereafter are carried at the lower of cost or fair value, net of deferred origination costs, until sold. In the normal course of business, NVRM enters into contractual commitments to extend credit to buyers of single-family homes with fixed expiration dates. The commitments become effective when the borrowers “lock-in” a specified interest rate within time frames established by NVRM. All mortgagors are evaluated for credit worthiness prior to the extension of the commitment. Market risk arises if interest rates move adversely between the time of the “lock-in” of rates by the borrower and the sale date of the loan to a broker/dealer. To mitigate the effect of the interest rate risk inherent in providing rate lock commitments to borrowers, NVRM enters into optional or mandatory delivery forward sale contracts to sell whole loans and mortgage-backed securities to broker/dealers. The forward sale contracts lock-in an interest rate and price for the sale of loans similar to the specific rate lock commitments. NVRM does not engage in speculative or trading derivative activities. Both the rate lock commitments to borrowers and the forward sale contracts to broker/dealers are undesignated derivatives, and, accordingly, are marked to fair value through earnings. At December 31, 2018 , there were contractual commitments to extend credit to borrowers aggregating $682,152 , and open forward delivery sale contracts aggregating $1,089,923 , which hedge both the rate lock loan commitments and closed loans held for sale (see Note 14 herein for a description of the Company’s fair value accounting).
Earnings Per Share	Earnings per Share The following weighted average shares and share equivalents were used to calculate basic and diluted earnings per share for the years ended December 31, 2018 , 2017 and 2016 : Year Ended December 31, 2018 2017 2016 Weighted average number of shares outstanding used to calculate basic EPS 3,631 3,733 3,847 Dilutive securities: Stock options and restricted share units 461 507 257 Weighted average number of shares and share equivalents outstanding used to calculate diluted EPS 4,092 4,240 4,104 The assumed proceeds used in the treasury method for calculating NVR’s diluted earnings per share includes the amount the employee must pay upon exercise and the amount of compensation cost attributed to future services not yet recognized. The following stock options issued under equity incentive plans were outstanding during the years ended December 31, 2018 , 2017 and 2016 , but were not included in the computation of diluted earnings per share because the effect would have been anti-dilutive. Year Ended December 31, 2018 2017 2016 Anti-dilutive securities 370 15 87
Revenues-Homebuilding Operations	Revenues – Homebuilding Operations NVR builds single-family detached homes, townhomes and condominium buildings, which generally are constructed on a pre-sold basis. Revenue is recognized on the settlement date at the contract sales price,when control is transferred to our customers.
Mortgage Banking Fees	Mortgage Banking Fees Mortgage banking fees include income earned by NVRM for originating mortgage loans, servicing mortgage loans held on an interim basis, title fees, gains and losses on the sale of mortgage loans and mortgage servicing and other activities incidental to mortgage banking. Mortgage banking fees are generally recognized after the loan has been sold to an unaffiliated, third party investor.
Income Taxes	Income Taxes Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax basis. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on the deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. See Note 11 herein for discussion of the impact on the Company's deferred tax asset resulting from the enactment of the Tax Cuts and Jobs Act in December 2017. ASC 740-10, Income Taxes , provides that a tax benefit from an uncertain tax position may be recognized when it is more-likely-than-not (defined as a likelihood of more than 50%) that the position will be sustained upon examination, including resolution of any related appeals or litigation processes, based on the technical merits. If a tax position does not meet the more-likely-than-not recognition threshold, despite the Company’s belief that its filing position is supportable, the benefit of that tax position is not recognized in the statements of income. The Company recognizes interest related to unrecognized tax benefits as a component of income tax expense. Based on its historical experience in dealing with various taxing authorities, the Company has found that it is the administrative practice of the taxing authorities to not seek penalties from the Company for the tax positions it has taken on its returns related to its unrecognized tax benefits. Therefore, the Company does not accrue penalties for the positions in which it has an unrecognized tax benefit. However, if such penalties were to be accrued, they would be recorded as a component of income tax expense. The Company recognizes unrecognized tax benefits in the period that the uncertainty is eliminated by either affirmative agreement of the uncertain tax position by the applicable taxing authority, by expiration of the applicable statute of limitation, or by determination in accordance with certain states’ administrative practices that the uncertain tax position has been effectively settled (see Note 11 herein for further information).
Financial Instruments	Financial Instruments Except as otherwise noted herein, NVR believes that the carrying value approximates the fair value of its financial instruments (see Note 14 herein for further information).
Equity-Based Compensation	Equity-Based Compensation The Company recognizes equity-based compensation expense within its income statement for all share-based payment arrangements, which includes non-qualified stock options to purchase shares of NVR common stock ("Options") and restricted share units ("RSUs"). Compensation expense is based on the grant-date fair value of the Options and RSUs granted, and is recognized on a straight-line basis over the requisite service period for the entire award (from the date of grant through the period of the last separately vesting portion of the grant). Options and RSUs which are subject to a performance condition are treated as a separate award from the “service-only” Options and RSUs, and compensation expense is recognized when it becomes probable that the stated performance target will be achieved. The Company calculates the fair value of its Options, which are non-publicly traded, using the Black-Scholes option-pricing model. The grant date fair value of the RSUs is the closing price of the Company’s common stock on the day immediately preceding the date of grant. The reversal of compensation expense previously recognized for grants forfeited is recorded in the period in which the forfeiture occurs. The Company’s equity-based compensation plans are accounted for as equity-classified awards (see Note 12 herein for further discussion of equity-based compensation plans).
Comprehensive Income	Comprehensive Income For the years ended December 31, 2018 , 2017 and 2016 , comprehensive income equaled net income; therefore, a separate statement of comprehensive income is not included in the accompanying consolidated financial statements.
Reclassifications	Reclassifications Certain prior period amounts have been reclassified to conform to the current year's presentation.
Recent Accounting Pronouncements	Recent Accounting Pronouncements Recently Adopted Accounting Pronouncements Revenue from Contracts with Customers On January 1, 2018, the Company adopted Accounting Standards Update ("ASU") 2014-09, Revenue from Contracts with Customers (Topic 606) , using the modified retrospective method applied to those contracts which were not completed as of January 1, 2018. Revenue Recognition Consistent with the Company’s previous revenue recognition practice, homebuilding revenue is recognized on the settlement date at the contract sales price, when control is transferred to our customers. Mortgage banking revenue recognition continues to be governed by Accounting Standards Codification ("ASC") Topic 815 - Derivatives and Hedging and ASC Topic 825 - Financial Instruments, and is not subject to Topic 606. See Note 2 for disclosure of revenue by reporting segment. The Company’s contract liabilities, consisting of deposits received from customers (“Handmoney”) on homes not settled, were $138,246 and $150,033 as of December 31, 2018 and 2017 , respectively. For the year ended December 31, 2018 , the Company recognized in revenue substantially all of the $150,033 in Handmoney held as of December 31, 2017 . The Company’s prepaid sales compensation totaled approximately $17,000 and $19,500 , as of December 31, 2018 and December 31, 2017 , respectively. These amounts are included in homebuilding “Other assets” on the accompanying consolidated balance sheets. Deferred Revenue Topic 606 no longer requires sellers of real estate to consider the initial and continuing involvement criteria in ASC 360-20, but instead only conclude on the collectibility of the transaction price. On January 1, 2018, the Company recorded a cumulative-effect adjustment, net of tax, of $2,196 to recognize deferred profit on home settlements for which the Company had previously determined that there was significant continuing involvement and believed to be fully collectible. Revenue recognized in 2018 would not have been materially different under prior GAAP. Practical Expedients and Exemption At contract inception, the performance obligation to complete and settle the home with a customer has an expected duration of less than one year. As a result, the Company does not disclose the value of unsatisfied performance obligations for contracts. No other adjustments were made as a result of the adoption of Topic 606. Other recently adopted accounting pronouncements The Company adopted ASU 2016-15, Classification of Certain Cash Receipts and Cash Payments, effective January 1, 2018. In connection with the adoption of ASU 2016-15, the Company made the election to classify distributions received from unconsolidated joint ventures using the cumulative earnings approach. This election was applied retrospectively, which reclassified a portion of distributions received from the Company's unconsolidated joint ventures between operating and investing activities on the prior year consolidated statement of cash flows. The adoption of this standard did not have a material effect on the Company's consolidated statements of cash flows and related disclosures. The Company adopted ASU 2016-18, Statement of Cash Flows (Topic 230), Restricted Cash, effective January 1, 2018. The amendments in the standard require that the statement of cash flows explain the change during the period in the total of cash, cash equivalents and restricted cash or restricted cash equivalents. As a result, the Company's beginning-of-period and end-of-period cash balances presented in the consolidated statements of cash flows were retrospectively adjusted to include restricted cash with cash and cash equivalents. The beginning-of-period and end-of-period cash, restricted cash, and cash equivalent balances presented on the accompanying consolidated statements of cash flows include cash related to a consolidated joint venture, which is included in homebuilding "Other assets" on the Company's consolidated balance sheets. The cash related to this consolidated joint venture as of December 31, 2018 , 2017 and 2016 was $320 , $1,069 and $1,214 , respectively. The adoption of this standard did not have a material effect on the Company's consolidated statements of cash flows and related disclosures. Recently Issued Accounting Pronouncements In February 2016, FASB issued ASU 2016-02, Leases (Topic 842) , which requires lessees to recognize most leases on-balance sheet with a liability equal to the present value of lease payments over the lease term and a right-of-use asset for the right to use the underlying asset over the lease term. Lessees will recognize expenses on their income statements in a manner similar to current GAAP. The standard also requires additional disclosures of key information about leasing arrangements. The standard was effective for the Company as of January 1, 2019. Based on its current portfolio of leases, the Company expects that the adoption of this standard will result in the recognition of less than $100,000 of right-of-use assets and corresponding liabilities on its balance sheet, predominately related to real estate leases. Additionally, in July 2018 the FASB issued ASU 2018-11, Leases (Topic 842): Targeted Improvements , which provides companies with relief from the costs of implementing certain aspects of the new lease standard. The ASU amends Topic 842 so that entities may elect not to restate their comparative periods during transition. Previously, the new lease standard required that an entity apply the new rules beginning with the earliest comparative period of financial statements presented (the modified retrospective approach). The Company has elected to use the transition relief provided under Topic 842 upon adoption of the standard effective January 1, 2019. In June 2016, FASB issued ASU 2016-13, Financial Instruments – Credit Losses (Topic 326) , which significantly changes the way impairment of financial assets is recognized. The standard will require immediate recognition of estimated credit losses expected to occur over the remaining life of many financial assets, which will generally result in earlier recognition of allowances for credit losses on loans and other financial instruments. The standard’s provisions will be applied as a cumulative-effect adjustment to beginning retained earnings as of the effective date. The standard is effective for the Company as of January 1, 2020. The Company does not believe that the adoption of this standard will have a material effect on its consolidated financial statements and related disclosures. In January 2017, FASB issued ASU 2017-04, Intangibles – Goodwill and Other (Topic 350), Simplifying the Test for Goodwill Impairment . The standard’s objective is to simplify the subsequent measurement of goodwill by eliminating the second step from the goodwill impairment test. Under the amendments in the standard, an entity would perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. If the carrying amount of a reporting unit exceeds its fair value, an impairment charge would then be recognized, not to exceed the amount of goodwill allocated to that reporting unit. The standard is effective for the Company on January 1, 2020, and early adoption is permitted. The Company does not believe that the adoption of this standard will have a material effect on its consolidated financial statements and related disclosures.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Weighted Average Shares and Share Equivalents Used to Calculate Basic and Diluted Earnings Per Share	The following weighted average shares and share equivalents were used to calculate basic and diluted earnings per share for the years ended December 31, 2018 , 2017 and 2016 : Year Ended December 31, 2018 2017 2016 Weighted average number of shares outstanding used to calculate basic EPS 3,631 3,733 3,847 Dilutive securities: Stock options and restricted share units 461 507 257 Weighted average number of shares and share equivalents outstanding used to calculate diluted EPS 4,092 4,240 4,104
Summary of Antidilutive Securities Excluded from Computation of Earnings Per Share	The following stock options issued under equity incentive plans were outstanding during the years ended December 31, 2018 , 2017 and 2016 , but were not included in the computation of diluted earnings per share because the effect would have been anti-dilutive. Year Ended December 31, 2018 2017 2016 Anti-dilutive securities 370 15 87

Segment Information, Nature o_2

Segment Information, Nature of Operations, and Certain Concentrations (Tables)	12 Months Ended
	Dec. 31, 2018
Segment Reporting [Abstract]
Revenues	Following are tables presenting segment revenues, profit before taxes, assets, interest income, interest expense, depreciation and amortization and expenditures for property and equipment, with reconciliations to the amounts reported for the consolidated enterprise, where applicable: Year Ended December 31, 2018 2017 2016 Revenues: Homebuilding Mid Atlantic $ 3,893,358 $ 3,543,687 $ 3,319,776 Homebuilding North East 580,726 517,141 462,385 Homebuilding Mid East 1,455,834 1,250,165 1,192,472 Homebuilding South East 1,074,386 864,528 734,590 Mortgage Banking 159,370 130,319 113,321 Consolidated revenues $ 7,163,674 $ 6,305,840 $ 5,822,544
Profit before Taxes	Year Ended December 31, 2018 2017 2016 Profit before taxes: Homebuilding Mid Atlantic $ 462,178 $ 398,494 $ 301,173 Homebuilding North East 69,789 60,218 21,947 Homebuilding Mid East 175,134 149,639 121,166 Homebuilding South East 118,296 95,826 71,098 Mortgage Banking 93,462 73,959 63,711 Total segment profit 918,859 778,136 579,095 Reconciling items: Contract land deposit reserve adjustment (1) 783 1,307 10,933 Equity-based compensation expense (2) (75,701 ) (44,562 ) (43,598 ) Corporate capital allocation (3) 213,903 198,384 189,992 Unallocated corporate overhead (89,973 ) (89,514 ) (89,376 ) Consolidation adjustments and other 15,829 26,143 35,204 Corporate interest expense (23,968 ) (22,983 ) (20,553 ) Reconciling items sub-total 40,873 68,775 82,602 Consolidated profit before taxes $ 959,732 $ 846,911 $ 661,697 (1) This item represents changes to the contract land deposit impairment reserve, which are not allocated to the reportable segments. (2) The increase in equity-based compensation expense for the year ended December 31, 2018 was primarily attributable to the issuance of Options and RSUs in the second quarter of 2018. See Note 12 for additional discussion of equity-based compensation. (3) This item represents the elimination of the corporate capital allocation charge included in the respective homebuilding reportable segments. The corporate capital allocation charge is based on the segment’s monthly average asset balance, and was as follows for the years presented:
Assets	As of December 31, 2018 2017 Assets: Homebuilding Mid Atlantic $ 1,018,953 $ 1,079,225 Homebuilding North East 144,412 143,008 Homebuilding Mid East 290,815 263,019 Homebuilding South East 332,468 277,705 Mortgage Banking 517,075 397,052 Total segment assets 2,303,723 2,160,009 Reconciling items: Cash and cash equivalents 688,783 645,087 Deferred taxes 112,333 111,953 Intangible assets and goodwill 49,989 50,144 Contract land deposit reserve (29,216 ) (29,999 ) Consolidation adjustments and other 40,321 52,085 Reconciling items sub-total 862,210 829,270 Consolidated assets $ 3,165,933 $ 2,989,279
Interest Income	Year Ended December 31, 2018 2017 2016 Interest income: Mortgage Banking $ 11,593 $ 7,850 $ 7,569 Total segment interest income 11,593 7,850 7,569 Other unallocated interest income 8,588 4,554 1,111 Consolidated interest income $ 20,181 $ 12,404 $ 8,680
Interest Expense	Year Ended December 31, 2018 2017 2016 Interest expense: Homebuilding Mid Atlantic $ 123,908 $ 123,075 $ 119,808 Homebuilding North East 17,897 16,117 18,141 Homebuilding Mid East 35,804 29,663 28,307 Homebuilding South East 36,362 29,583 23,804 Mortgage Banking 1,045 1,148 1,086 Total segment interest expense 215,016 199,586 191,146 Corporate capital allocation (3) (213,903 ) (198,384 ) (189,992 ) Senior Notes and other interest 23,968 22,983 20,553 Consolidated interest expense $ 25,081 $ 24,185 $ 21,707
Depreciation and Amortization	Year Ended December 31, 2018 2017 2016 Depreciation and amortization: Homebuilding Mid Atlantic $ 7,753 $ 8,095 $ 8,089 Homebuilding North East 1,600 2,034 2,053 Homebuilding Mid East 3,481 3,590 3,748 Homebuilding South East 2,523 2,531 2,276 Mortgage Banking 1,489 1,297 1,117 Total segment depreciation and amortization 16,846 17,547 17,283 Unallocated corporate 3,322 5,120 4,986 Consolidated depreciation and amortization $ 20,168 $ 22,667 $ 22,269
Expenditures for Property and Equipment	Year Ended December 31, 2018 2017 2016 Expenditures for property and equipment: Homebuilding Mid Atlantic $ 6,657 $ 9,257 $ 8,838 Homebuilding North East 1,074 1,299 3,423 Homebuilding Mid East 4,302 3,117 4,027 Homebuilding South East 2,732 3,313 3,594 Mortgage Banking 1,677 2,723 726 Total segment expenditures for property and equipment 16,442 19,709 20,608 Unallocated corporate 3,223 560 1,761 Consolidated expenditures for property and equipment $ 19,665 $ 20,269 $ 22,369
Corporate Capital Allocation Charge	Year Ended December 31, 2018 2017 2016 Corporate capital allocation charge: Homebuilding Mid Atlantic $ 123,855 $ 123,028 $ 119,758 Homebuilding North East 17,893 16,115 18,132 Homebuilding Mid East 35,803 29,663 28,303 Homebuilding South East 36,352 29,578 23,799 Total corporate capital allocation charge $ 213,903 $ 198,384 $ 189,992

Variable Interest Entities (Tab

Variable Interest Entities (Tables)	12 Months Ended
	Dec. 31, 2018
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure [Abstract]
Total Risk of Loss Related to Contract Land Deposits	NVR’s total risk of loss related to contract land deposits as of December 31, 2018 and 2017 was as follows: December 31, 2018 2017 Contract land deposits $ 425,393 $ 400,428 Loss reserve on contract land deposits (29,216 ) (29,999 ) Contract land deposits, net 396,177 370,429 Contingent obligations in the form of letters of credit 3,923 1,996 Contingent specific performance obligations (1) 1,505 1,505 Total risk of loss $ 401,605 $ 373,930 (1) As of both December 31, 2018 and 2017 , the Company was committed to purchase 10 finished lots under specific performance obligations.

Joint Ventures (Tables)

Joint Ventures (Tables)	12 Months Ended
	Dec. 31, 2018
Consolidated Joint Venture
Schedule of Equity Method Investments [Line Items]
Condensed Balance Sheets	The condensed balance sheets of the consolidated JV at December 31, 2018 and 2017 were as follows: December 31, 2018 2017 Assets: Cash $ 320 $ 1,069 Other assets — 37 Total assets $ 320 $ 1,106 Liabilities and equity: Accrued expenses $ 282 $ 487 Equity 38 619 Total liabilities and equity $ 320 $ 1,106

Capitalized Interest (Tables)

Capitalized Interest (Tables)	12 Months Ended
	Dec. 31, 2018
Capitalized Interest Costs, Including Allowance for Funds Used During Construction [Abstract]
Summary of Interest Costs Incurred, Capitalized, Expensed and Charged to Cost of Sales	NVR’s interest costs incurred, capitalized, expensed and charged to cost of sales during the years ended December 31, 2018 , 2017 and 2016 was as follows: December 31, 2018 2017 2016 Interest capitalized, beginning of year $ 5,583 $ 5,106 $ 4,434 Interest incurred 26,277 26,384 25,951 Interest charged to interest expense (25,081 ) (24,185 ) (21,707 ) Interest charged to cost of sales (2,625 ) (1,722 ) (3,572 ) Interest capitalized, end of year $ 4,154 $ 5,583 $ 5,106

Property, Plant and Equipment_2

Property, Plant and Equipment ("PP&E") (Tables)	12 Months Ended
	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Summary of Property, Plant and Equipment ("PP&E")	December 31, 2018 2017 Homebuilding: Office facilities and other $ 37,789 $ 35,219 Model home furniture and fixtures 31,593 33,901 Production facilities 64,667 61,348 Gross Homebuilding PP&E 134,049 130,468 Less: accumulated depreciation (91,815 ) (87,277 ) Net Homebuilding PP&E $ 42,234 $ 43,191 Mortgage Banking: Office facilities and other $ 13,724 $ 14,069 Less: accumulated depreciation (7,214 ) (7,742 ) Net Mortgage Banking PP&E $ 6,510 $ 6,327

Common Stock (Tables)

Common Stock (Tables)	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
Share Repurchases of Common Stock	The Company made the following share repurchases during the years indicated: Year Ended December 31, 2018 2017 2016 Aggregate purchase price $ 846,134 $ 422,166 $ 455,351 Number of shares repurchased 301 167 280

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Provision for Income Taxes	The provision for income taxes consists of the following: Year Ended December 31, 2018 2017 2016 Current: Federal $ 126,358 $ 211,641 $ 209,454 State 37,038 37,006 38,095 Deferred: Federal 138 60,785 (9,230 ) State (999 ) (42 ) (1,884 ) Income tax expense $ 162,535 $ 309,390 $ 236,435
Deferred Income Taxes on Consolidated Balance Sheets	Deferred income taxes on NVR’s consolidated balance sheets were comprised of the following: December 31, 2018 2017 Deferred tax assets: Other accrued expenses and contract land deposit reserve $ 51,316 $ 49,063 Deferred compensation 4,693 4,743 Equity-based compensation expense 40,744 36,799 Inventory 9,242 9,393 Unrecognized tax benefit 13,587 14,351 Other 5,113 9,681 Total deferred tax assets 124,695 124,030 Less: Deferred tax liabilities 6,091 4,511 Net deferred tax asset $ 118,604 $ 119,519
Income Tax Expense Reconciliation	A reconciliation of income taxes computed at the federal statutory rate ( 21% in 2018 and 35% in 2017 and 2016) to income tax expense is as follows: Year Ended December 31, 2018 2017 2016 Income taxes computed at the federal statutory rate $ 201,544 $ 296,419 $ 231,595 State income taxes, net of federal income tax benefit (1) 42,944 30,046 23,738 Excess tax benefits from equity-based compensation (2) (77,478 ) (58,681 ) — Remeasurement of net deferred tax assets due to enactment of Tax Cut and Jobs Act (3) (497 ) 62,702 — Other, net (4) (3,978 ) (21,096 ) (18,898 ) Income tax expense $ 162,535 $ 309,390 $ 236,435 (1) Excludes state excess tax benefits from equity-based compensation included in the line below. (2) ASU 2016-09 adopted January 1, 2017. Excess tax benefits related to equity-based compensation of $13,661 in 2016 were recorded to shareholders' equity. (3) The enactment of the Tax Cuts and Jobs Act in December 2017 required a remeasurement of the Company's net deferred tax assets and resulted in additional income tax expense of $62,702 . (4) Primarily attributable to tax benefits from certain energy credits for the year ended December 31, 2018. For the years ended December 31, 2017 and 2016, this was primarily attributable to tax benefits from the domestic production activities deduction. The domestic production activities deduction was eliminated effective January 1, 2018, following the enactment of the Tax Cuts and Jobs Act in December 2017.
Reconciliation of Unrecognized Tax Benefits	A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows: Year Ended December 31, 2018 2017 Balance at beginning of year $ 45,337 $ 46,110 Additions based on tax positions related to the current year 4,340 4,793 Reductions for tax positions of prior years (6,259 ) (5,566 ) Settlements — — Balance at end of year $ 43,418 $ 45,337

Equity-Based Compensation, Pr_2

Equity-Based Compensation, Profit Sharing and Deferred Compensation Plans (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of Equity-Based Compensation Plans with Grants Outstanding [Table Text Block]	During 2018 , the Company issued 345 Options and 16 RSUs under the 2010 Plan, the 2014 Plan, and the 2018 Plan as follows: 2010 Plan 2014 Plan 2018 Plan Options Granted Options (4) 6 93 73 Performance-based Options (5) — 100 73 Total Options Granted 6 193 146 RSUs Granted RSUs (6) 8 — — Performance-based RSUs (7) 8 — — Total RSUs Granted 16 — — (4) Of the 172 service-only Options granted, 34 will generally vest over two years in 50% increments on December 31, 2020 and 2021; the remaining 138 Options will generally vest over four years in 25% increments on December 31, 2020, 2021, 2022, and 2023. Vesting for the Options is contingent solely upon continued employment or continued service as a Director. (5) Of the 173 performance-based Options granted, 34 will vest over two years in 50% increments on December 31, 2020 and 2021; the remaining 139 performance-based Options will generally vest over four years in 25% increments on December 31, 2020, 2021, 2022, and 2023. Vesting for the performance-based Options is contingent upon both continued employment or continued service as a Director and the Company's return on capital performance during 2018 through 2020. (6) The service-only RSUs granted will vest over two years in 50% increments on December 31, 2022 and 2023. Vesting for the RSUs is contingent solely upon continued employment. (7) The performance-based RSUs granted will vest over two years in 50% increments on December 31, 2022 and 2023. Vesting for the performance-based RSUs is contingent upon both continued employment and the Company's return on capital performance during 2018 through 2020.
Summary of Equity-Based Compensation Plans with Grants Outstanding	The following table provides a summary of each of the Company’s equity-based compensation plans for any plan with grants outstanding at December 31, 2018 : Equity-Based Compensation Plans Shares Authorized Options/RSUs Outstanding Shares Available to Issue 2000 Broadly-Based Stock Option Plan 2,000 63 — 2010 Equity Incentive Plan (1) 700 160 26 2014 Equity Incentive Plan (2) 950 701 102 2018 Equity Incentive Plan (3) 275 146 129 (1) During 2010, the Company’s shareholders approved the 2010 Equity Incentive Plan (the “2010 Plan”). The 2010 Plan authorizes the Company to issue Options and RSUs to key management employees, including executive officers and Directors. Of the 700 aggregate shares available to issue, up to 240 may be granted in the form of RSUs. There were 139 Options and 21 RSUs outstanding as of December 31, 2018 . Of the 26 shares available to be issued under the 2010 Plan, 22 may be granted as RSUs. (2) During 2014, the Company’s shareholders approved the 2014 Equity Incentive Plan (the “2014 Plan”). The 2014 Plan authorizes the Company to issue Options to key management employees, including executive officers and Directors. (3) The Company’s shareholders approved the 2018 Equity Incentive Plan (the "2018 Plan") at the Company’s Annual Meeting of Shareholders held on May 2, 2018. The 2018 Plan authorizes the Company to issue up to an aggregate of 275 shares of the Company’s common stock in the form of Options and RSUs to key management employees, including executive officers and Directors. Of the 275 aggregate shares available to issue, all may be granted in the form of Options and up to 40 may be granted in the form of RSUs.
Equity-Based Compensation Plans	The following table provides additional information relative to NVR’s equity-based compensation plans for the year ended December 31, 2018 : Shares Weighted Avg. Per Share Exercise Price Weighted Avg. Remaining Contract Life (years) Aggregate Intrinsic Value Stock Options Outstanding at December 31, 2017 916 $ 1,119.92 Granted 345 3,013.61 Exercised (182 ) 954.49 Forfeited (30 ) 1,283.48 Outstanding at December 31, 2018 1,049 $ 1,766.87 6.5 $ 703,087 Exercisable at December 31, 2018 466 $ 1,032.44 4.6 $ 655,141 RSUs Outstanding at December 31, 2017 10 Granted 16 Vested (5 ) Forfeited — Outstanding at December 31, 2018 21 $ 50,719 Vested, but not issued at December 31, 2018 5 $ 11,532
Black-Scholes Option-Pricing Model Assumptions	The fair value of the Options granted during 2018 , 2017 and 2016 was estimated on the grant date using the Pricing Model, based on the following assumptions: 2018 2017 2016 Estimated option life (years) 5.06 5.26 5.27 Risk free interest rate (range) 2.19%-3.13% 1.53%-2.38% 0.86%-2.21% Expected volatility (range) 16.57%-20.05% 15.09%-17.95% 15.91%-23.49% Expected dividend rate — % — % — % Weighted average grant-date fair value per share of options granted $ 687.81 $ 494.17 $ 320.21
Exercised Option Proceeds	Information with respect to the vested RSUs and exercised Options is as follows: Year Ended December 31, 2018 2017 2016 Aggregate exercise proceeds $ 174,110 $ 140,525 $ 38,106 Aggregate intrinsic value on exercise dates $ 355,318 $ 206,890 $ 96,600

Commitments and Contingent Li_2

Commitments and Contingent Liabilities (Tables)	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Future Minimum Lease Payments under Operating Leases	Future minimum lease payments under these operating leases as of December 31, 2018 are as follows: Year Ending December 31, 2019 $ 31,564 2020 22,210 2021 17,331 2022 13,667 2023 10,324 Thereafter 12,607 107,703 Sublease income (25 ) $ 107,678
Summary of Changes in Product Warranties Reserve	The following table reflects the changes in the Company’s warranty reserve (see Note 1 herein for further discussion of warranty/product liability reserves): Year Ended December 31, 2018 2017 2016 Warranty reserve, beginning of year $ 94,513 $ 93,895 $ 87,407 Provision 62,553 44,652 50,787 Payments (53,366 ) (44,034 ) (44,299 ) Warranty reserve, end of year $ 103,700 $ 94,513 $ 93,895

Fair Value (Tables)

Fair Value (Tables)	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Undesignated Derivative Instruments	The fair value measurement of NVRM's undesignated derivative instruments was as follows: As of December 31, 2018 2017 Rate lock commitments: Gross assets $ 13,831 $ 5,400 Gross liabilities 345 1,832 Net rate lock commitments $ 13,486 $ 3,568 Forward sales contracts: Gross assets $ 64 $ 992 Gross liabilities 10,121 667 Net forward sales contracts $ (10,057 ) $ 325
Fair Value Measurement	The fair value measurement as of December 31, 2018 was as follows: Notional or Principal Amount Assumed Gain/(Loss) From Loan Sale Interest Rate Movement Effect Servicing Rights Value Security Price Change Total Fair Value Measurement Gain/(Loss) Rate lock commitments $ 682,152 $ 1,360 $ 4,630 $ 7,496 $ — $ 13,486 Forward sales contracts $ 1,089,923 — — — (10,057 ) (10,057 ) Mortgages held for sale $ 447,444 1,267 3,637 5,976 — 10,880 Total fair value measurement $ 2,627 $ 8,267 $ 13,472 $ (10,057 ) $ 14,309

Quarterly Results (unaudited) (

Quarterly Results (unaudited) (Tables)	12 Months Ended
	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Data and Operating Information	The following table sets forth unaudited selected financial data and operating information on a quarterly basis for the years ended December 31, 2018 and 2017 . Year Ended December 31, 2018 4th Quarter 3rd Quarter 2nd Quarter 1st Quarter Revenues – homebuilding operations $ 1,954,403 $ 1,809,345 $ 1,750,463 $ 1,490,093 Gross profit – homebuilding operations $ 363,668 $ 336,696 $ 333,666 $ 278,147 Mortgage banking fees $ 40,145 $ 43,062 $ 36,842 $ 39,321 Net income $ 232,158 $ 195,816 $ 203,174 $ 166,049 Diluted earnings per share $ 58.57 $ 48.28 $ 49.05 $ 39.34 New orders (units) 3,841 4,302 4,964 5,174 Settlements (units) 5,186 4,754 4,611 3,896 Backlog, end of period (units) 8,365 9,710 10,162 9,809 Loans closed $ 1,356,430 $ 1,249,199 $ 1,214,101 $ 1,009,673 Year Ended December 31, 2017 4th Quarter 3rd Quarter 2nd Quarter 1st Quarter Revenues – homebuilding operations $ 1,781,494 $ 1,633,726 $ 1,512,714 $ 1,247,587 Gross profit – homebuilding operations $ 343,187 $ 325,755 $ 294,631 $ 221,570 Mortgage banking fees $ 34,842 $ 34,194 $ 31,778 $ 29,505 Net income $ 124,619 $ 162,102 $ 147,877 $ 102,923 Diluted earnings per share $ 28.88 $ 38.02 $ 35.19 $ 25.12 New orders (units) 4,306 4,200 4,678 4,424 Settlements (units) 4,630 4,158 3,917 3,256 Backlog, end of period (units) 8,531 8,855 8,813 8,052 Loans closed $ 1,229,695 $ 1,115,494 $ 1,041,613 $ 843,341

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 01, 2019	Dec. 31, 2015
Significant Accounting Policies [Line Items]
Net Contract Land Deposit Impairment Recoveries	$ 5,115,000
Cash	732,248,000	$ 689,557,000	$ 416,037,000		$ 450,794,000
Contract land deposit impairments (recoveries), net	11,760,000	1,238,000	(4,269,000)
Contract land deposit assets impairment valuation allowances	29,216,000	29,999,000
Excess tax benefits from equity-based compensation	77,478,000	58,681,000	0
Cumulative-effect adjustment from adoption of ASU 2016-09, net of tax	2,196,000	609,000
Retained Earnings
Significant Accounting Policies [Line Items]
Cumulative-effect adjustment from adoption of ASU 2016-09, net of tax	$ 2,196,000	(957,000)
Model home furniture and fixtures
Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life	2 years
Office facilities and other | Minimum
Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Office facilities and other | Maximum
Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life	10 years
Manufacturing Facilities | Minimum
Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life	5 years
Manufacturing Facilities | Maximum
Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life	40 years
Homebuilding:
Significant Accounting Policies [Line Items]
Customer deposits	$ 138,246,000	150,033,000
Cash	688,783,000	645,087,000
Impairment of goodwill	0
Homebuilding: | Heartland Homes Inc
Significant Accounting Policies [Line Items]
Finite-lived intangibles acquired from business acquisition, net of accumulated amortization	$ 621,000	776,000
Weighted average life of finite-lived intangible assets	4 years
Goodwill acquired from business acquisition	$ 441,000	441,000
Mortgage Banking:
Significant Accounting Policies [Line Items]
Cash	$ 23,092,000	21,707,000
Mortgage Banking: | Level 2 | Fair Value, Measurements, Recurring
Significant Accounting Policies [Line Items]
Typical length of days loans sold into secondary market	30 days
Mortgage Banking: | Level 2 | Fair Value, Measurements, Recurring | Rate lock commitments
Significant Accounting Policies [Line Items]
Notional or Principal Amount	$ 682,152,000
Mortgage Banking: | Level 2 | Fair Value, Measurements, Recurring | Forward sales contracts
Significant Accounting Policies [Line Items]
Notional or Principal Amount	1,089,923,000
Consolidated Joint Venture
Significant Accounting Policies [Line Items]
Cash	320,000	1,069,000	$ 1,214,000
Other Assets
Significant Accounting Policies [Line Items]
Capitalized Contract Cost, Net	$ 17,000,000	$ 19,500,000
Scenario, Forecast [Member] | Accounting Standards Update 2016-02 [Member]
Significant Accounting Policies [Line Items]
Cumulative-effect adjustment from adoption of ASU 2016-09, net of tax				$ 0

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Weighted Average Shares and Share Equivalents Used to Calculate Basic and Diluted Earnings Per Share (Detail) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accounting Policies [Abstract]
Weighted average number of shares outstanding used to calculate basic EPS (in Shares)	3,631	3,733	3,847
Dilutive securities:
Stock options and restricted share units (in Shares)	461	507	257
Weighted average number of shares and share equivalents outstanding used to calculate diluted EPS (in Shares)	4,092	4,240	4,104

Summary of Significant Accoun_6

Summary of Significant Accounting Policies - Summary of Antidilutive Securities Excluded from Computation of Earnings Per Share (Detail) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accounting Policies [Abstract]
Anti-dilutive securities (in Shares)	370	15	87

Segment Information, Nature o_3

Segment Information, Nature of Operations, and Certain Concentrations - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2018Trade_Namesmetropolitan_areasegment
Segment Reporting Information [Line Items]
Number of trade names | Trade_Names	3
Number of metropolitan areas Ryan Homes product are sold | metropolitan_area	32
Senior Notes due 2022
Segment Reporting Information [Line Items]
Senior notes interest rate	3.95%
Homebuilding:
Segment Reporting Information [Line Items]
Number of reportable segments	4
Mortgage Banking:
Segment Reporting Information [Line Items]
Number of reportable segments	1
Geographic Concentration Risk | Homebuilding: | District of Columbia
Segment Reporting Information [Line Items]
Revenue derived	30.00%
Geographic Concentration Risk | Homebuilding: | Maryland, Baltimore
Segment Reporting Information [Line Items]
Revenue derived	10.00%

Segment Information, Nature o_4

Segment Information, Nature of Operations, and Certain Concentrations - Revenues (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting, Revenue Reconciling Item [Line Items]
Consolidated revenues									$ 7,163,674	$ 6,305,840	$ 5,822,544
Homebuilding:
Segment Reporting, Revenue Reconciling Item [Line Items]
Consolidated revenues	$ 1,954,403	$ 1,809,345	$ 1,750,463	$ 1,490,093	$ 1,781,494	$ 1,633,726	$ 1,512,714	$ 1,247,587	7,004,304	6,175,521	5,709,223
Homebuilding: | Mid Atlantic
Segment Reporting, Revenue Reconciling Item [Line Items]
Consolidated revenues									3,893,358	3,543,687	3,319,776
Homebuilding: | North East
Segment Reporting, Revenue Reconciling Item [Line Items]
Consolidated revenues									580,726	517,141	462,385
Homebuilding: | Mid East
Segment Reporting, Revenue Reconciling Item [Line Items]
Consolidated revenues									1,455,834	1,250,165	1,192,472
Homebuilding: | South East
Segment Reporting, Revenue Reconciling Item [Line Items]
Consolidated revenues									1,074,386	864,528	734,590
Mortgage Banking:
Segment Reporting, Revenue Reconciling Item [Line Items]
Consolidated revenues	$ 40,145	$ 43,062	$ 36,842	$ 39,321	$ 34,842	$ 34,194	$ 31,778	$ 29,505	$ 159,370	$ 130,319	$ 113,321

Segment Information, Nature o_5

Segment Information, Nature of Operations, and Certain Concentrations - Profit before Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Profit before taxes	$ 959,732	$ 846,911	$ 661,697
Equity-based compensation expense	(75,701)	(44,562)	(43,598)
Corporate interest expense	(25,081)	(24,185)	(21,707)
Homebuilding:
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Profit before taxes	871,106	776,370	601,102
Corporate interest expense	(24,036)	(23,037)	(20,621)
Mortgage Banking:
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Profit before taxes	88,626	70,541	60,595
Corporate interest expense	(1,045)	(1,148)	(1,086)
Profit before taxes:
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Profit before taxes	918,859	778,136	579,095
Corporate interest expense	(215,016)	(199,586)	(191,146)
Profit before taxes: | Homebuilding: | Mid Atlantic
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Profit before taxes	462,178	398,494	301,173
Corporate interest expense	(123,908)	(123,075)	(119,808)
Profit before taxes: | Homebuilding: | North East
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Profit before taxes	69,789	60,218	21,947
Corporate interest expense	(17,897)	(16,117)	(18,141)
Profit before taxes: | Homebuilding: | Mid East
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Profit before taxes	175,134	149,639	121,166
Corporate interest expense	(35,804)	(29,663)	(28,307)
Profit before taxes: | Homebuilding: | South East
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Profit before taxes	118,296	95,826	71,098
Corporate interest expense	(36,362)	(29,583)	(23,804)
Profit before taxes: | Mortgage Banking:
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Profit before taxes	93,462	73,959	63,711
Corporate interest expense	(1,045)	(1,148)	(1,086)
Reconciling items:
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Profit before taxes	40,873	68,775	82,602
Contract land deposit reserve adjustment	783	1,307	10,933
Equity-based compensation expense	(75,701)	(44,562)	(43,598)
Corporate capital allocation charge	213,903	198,384	189,992
Unallocated corporate overhead	(89,973)	(89,514)	(89,376)
Consolidation adjustments and other	15,829	26,143	35,204
Corporate interest expense	$ (23,968)	$ (22,983)	$ (20,553)

Segment Information, Nature o_6

Segment Information, Nature of Operations, and Certain Concentrations - Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 3,165,933	$ 2,989,279
Cash and cash equivalents	732,248	689,557	$ 416,037	$ 450,794
Contract land deposit reserve	(29,216)	(29,999)
Homebuilding:
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	2,641,511	2,584,880
Cash and cash equivalents	688,783	645,087
Deferred taxes	112,333	111,953
Mortgage Banking:
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	524,422	404,399
Cash and cash equivalents	23,092	21,707
Profit before taxes:
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	2,303,723	2,160,009
Profit before taxes: | Homebuilding: | Mid Atlantic
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	1,018,953	1,079,225
Profit before taxes: | Homebuilding: | North East
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	144,412	143,008
Profit before taxes: | Homebuilding: | Mid East
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	290,815	263,019
Profit before taxes: | Homebuilding: | South East
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	332,468	277,705
Profit before taxes: | Mortgage Banking:
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	517,075	397,052
Reconciling items:
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	862,210	829,270
Cash and cash equivalents	688,783	645,087
Deferred taxes	112,333	111,953
Intangible assets and goodwill	49,989	50,144
Contract land deposit reserve	(29,216)	(29,999)
Consolidation adjustments and other	$ 40,321	$ 52,085

Segment Information, Nature o_7

Segment Information, Nature of Operations, and Certain Concentrations - Interest Income (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting, Other Significant Reconciling Item [Line Items]
Consolidated interest income	$ 20,181	$ 12,404	$ 8,680
Mortgage Banking:
Segment Reporting, Other Significant Reconciling Item [Line Items]
Interest income	11,593	7,850	7,569
Profit before taxes:
Segment Reporting, Other Significant Reconciling Item [Line Items]
Interest income	11,593	7,850	7,569
Other unallocated interest income
Segment Reporting, Other Significant Reconciling Item [Line Items]
Other unallocated interest income	$ 8,588	$ 4,554	$ 1,111

Segment Information, Nature o_8

Segment Information, Nature of Operations, and Certain Concentrations - Interest Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting, Other Significant Reconciling Item [Line Items]
Consolidated interest expense	$ 25,081	$ 24,185	$ 21,707
Homebuilding:
Segment Reporting, Other Significant Reconciling Item [Line Items]
Consolidated interest expense	24,036	23,037	20,621
Mortgage Banking:
Segment Reporting, Other Significant Reconciling Item [Line Items]
Consolidated interest expense	1,045	1,148	1,086
Profit before taxes:
Segment Reporting, Other Significant Reconciling Item [Line Items]
Consolidated interest expense	215,016	199,586	191,146
Profit before taxes: | Homebuilding: | Mid Atlantic
Segment Reporting, Other Significant Reconciling Item [Line Items]
Consolidated interest expense	123,908	123,075	119,808
Profit before taxes: | Homebuilding: | North East
Segment Reporting, Other Significant Reconciling Item [Line Items]
Consolidated interest expense	17,897	16,117	18,141
Profit before taxes: | Homebuilding: | Mid East
Segment Reporting, Other Significant Reconciling Item [Line Items]
Consolidated interest expense	35,804	29,663	28,307
Profit before taxes: | Homebuilding: | South East
Segment Reporting, Other Significant Reconciling Item [Line Items]
Consolidated interest expense	36,362	29,583	23,804
Profit before taxes: | Mortgage Banking:
Segment Reporting, Other Significant Reconciling Item [Line Items]
Consolidated interest expense	1,045	1,148	1,086
Reconciling items:
Segment Reporting, Other Significant Reconciling Item [Line Items]
Consolidated interest expense	23,968	22,983	20,553
Corporate capital allocation charge	$ 213,903	$ 198,384	$ 189,992

Segment Information, Nature o_9

Segment Information, Nature of Operations, and Certain Concentrations - Depreciation and Amortization (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting, Other Significant Reconciling Item [Line Items]
Consolidated depreciation and amortization	$ 20,168	$ 22,667	$ 22,269
Profit before taxes:
Segment Reporting, Other Significant Reconciling Item [Line Items]
Consolidated depreciation and amortization	16,846	17,547	17,283
Profit before taxes: | Homebuilding: | Mid Atlantic
Segment Reporting, Other Significant Reconciling Item [Line Items]
Consolidated depreciation and amortization	7,753	8,095	8,089
Profit before taxes: | Homebuilding: | North East
Segment Reporting, Other Significant Reconciling Item [Line Items]
Consolidated depreciation and amortization	1,600	2,034	2,053
Profit before taxes: | Homebuilding: | Mid East
Segment Reporting, Other Significant Reconciling Item [Line Items]
Consolidated depreciation and amortization	3,481	3,590	3,748
Profit before taxes: | Homebuilding: | South East
Segment Reporting, Other Significant Reconciling Item [Line Items]
Consolidated depreciation and amortization	2,523	2,531	2,276
Profit before taxes: | Mortgage Banking:
Segment Reporting, Other Significant Reconciling Item [Line Items]
Consolidated depreciation and amortization	1,489	1,297	1,117
Other unallocated interest income
Segment Reporting, Other Significant Reconciling Item [Line Items]
Consolidated depreciation and amortization	$ 3,322	$ 5,120	$ 4,986

Segment Information, Nature _10

Segment Information, Nature of Operations, and Certain Concentrations - Expenditures for Property and Equipment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting, Other Significant Reconciling Item [Line Items]
Expenditures for property and equipment:	$ 19,665	$ 20,269	$ 22,369
Profit before taxes:
Segment Reporting, Other Significant Reconciling Item [Line Items]
Expenditures for property and equipment:	16,442	19,709	20,608
Profit before taxes: | Homebuilding: | Mid Atlantic
Segment Reporting, Other Significant Reconciling Item [Line Items]
Expenditures for property and equipment:	6,657	9,257	8,838
Profit before taxes: | Homebuilding: | North East
Segment Reporting, Other Significant Reconciling Item [Line Items]
Expenditures for property and equipment:	1,074	1,299	3,423
Profit before taxes: | Homebuilding: | Mid East
Segment Reporting, Other Significant Reconciling Item [Line Items]
Expenditures for property and equipment:	4,302	3,117	4,027
Profit before taxes: | Homebuilding: | South East
Segment Reporting, Other Significant Reconciling Item [Line Items]
Expenditures for property and equipment:	2,732	3,313	3,594
Profit before taxes: | Mortgage Banking:
Segment Reporting, Other Significant Reconciling Item [Line Items]
Expenditures for property and equipment:	1,677	2,723	726
Other unallocated interest income
Segment Reporting, Other Significant Reconciling Item [Line Items]
Expenditures for property and equipment:	$ 3,223	$ 560	$ 1,761

Segment Information, Nature _11

Segment Information, Nature of Operations, and Certain Concentrations - Corporate Capital Allocation Charge (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Corporate Reconciling Items And Eliminations [Member]
Segment Reporting, Other Significant Reconciling Item [Line Items]
Corporate capital allocation charge	$ (213,903)	$ (198,384)	$ (189,992)
Corporate Reconciling Items And Eliminations [Member] | Homebuilding: | Mid Atlantic
Segment Reporting, Other Significant Reconciling Item [Line Items]
Corporate capital allocation charge	(123,855)	(123,028)	(119,758)
Corporate Reconciling Items And Eliminations [Member] | Homebuilding: | North East
Segment Reporting, Other Significant Reconciling Item [Line Items]
Corporate capital allocation charge	(17,893)	(16,115)	(18,132)
Corporate Reconciling Items And Eliminations [Member] | Homebuilding: | Mid East
Segment Reporting, Other Significant Reconciling Item [Line Items]
Corporate capital allocation charge	(35,803)	(29,663)	(28,303)
Corporate Reconciling Items And Eliminations [Member] | Homebuilding: | South East
Segment Reporting, Other Significant Reconciling Item [Line Items]
Corporate capital allocation charge	(36,352)	(29,578)	(23,799)
Reconciling items:
Segment Reporting, Other Significant Reconciling Item [Line Items]
Corporate capital allocation charge	$ 213,903	$ 198,384	$ 189,992

Variable Interest Entities - Ad

Variable Interest Entities - Additional Information (Detail) $ in Thousands	Dec. 31, 2018USD ($)lot	Dec. 31, 2017USD ($)
Variable Interest Entity [Line Items]
Maximum range of deposits required under the purchase agreements	10.00%
Contract land deposits in cash	$ 425,393	$ 400,428
Variable Interest Entities
Variable Interest Entity [Line Items]
Maximum range of deposits required under the purchase agreements	10.00%
Lots controlled by NVR | lot	95,800
Contract land deposits in cash under Lot Purchase Agreements	$ 420,900
Letters of credit related to lots	$ 3,800
Contract on Raw Ground with Landowners
Variable Interest Entity [Line Items]
Lots controlled by NVR | lot	7,500
Contract land deposits in cash	$ 4,500
Letters of credit on raw land contracts	150
Refundable deposits	$ 1,700

Variable Interest Entities - To

Variable Interest Entities - Total Risk of Loss Related to Contract Land Deposits (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure [Abstract]
Contract land deposits	$ 425,393	$ 400,428
Loss reserve on contract land deposits	(29,216)	(29,999)
Contract land deposits, net	396,177	370,429
Contingent obligations in the form of letters of credit	3,923	1,996
Contingent specific performance obligations	1,505	1,505
Total risk of loss	$ 401,605	$ 373,930

Variable Interest Entities - _2

Variable Interest Entities - Total Risk of Loss Related to Contract Land Deposits (Textual) (Detail) - lot	Dec. 31, 2018	Dec. 31, 2017
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure [Abstract]
Finished lots committed to purchase under specific performance obligations	10	10

Joint Ventures - Additional Inf

Joint Ventures - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)lotjoint_venture	Dec. 31, 2017USD ($)lotjoint_venture
Joint Ventures [Line Items]
Aggregate investment	$ 29,400	$ 45,500
Number of joint ventures | joint_venture	6	6
Expected production of finished lots | lot	6,800	7,300
Total lots controlled by company under the joint venture | lot	3,500	3,900
Total lots either under contract with unrelated parties or not under the current contract | lot	3,400	3,400
Additional funding commitments in the aggregate	$ 5,000	$ 5,300
Number of joint ventures with additional funding commitment | joint_venture	3	3
Number of joint ventures NVR is not primary beneficiary | joint_venture	5
Other Assets
Joint Ventures [Line Items]
Aggregate investment	$ 29,400	$ 45,200
Cost of Sales
Joint Ventures [Line Items]
Equity Method Investment, Other than Temporary Impairment	7,400
EquityMethodInvestmentOtherThanTemporaryImpairmentCapitalizedInterestPortion	$ 760

Joint Ventures - Condensed Bala

Joint Ventures - Condensed Balance Sheets (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Assets:
Cash	$ 732,248	$ 689,557	$ 416,037	$ 450,794
Liabilities and equity:
Equity	1,808,562	1,605,492	1,304,441	$ 1,239,165
Total liabilities and shareholders' equity	3,165,933	2,989,279
Consolidated Joint Venture
Assets:
Cash	320	1,069	$ 1,214
Other assets	0	37
Total assets	320	1,106
Liabilities and equity:
Accrued expenses	282	487
Equity	38	619
Total liabilities and shareholders' equity	$ 320	$ 1,106

Land Under Development - Additi

Land Under Development - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)lotparcel	Dec. 31, 2017USD ($)lotparcel
Real Estate [Abstract]
Number of finished lots for use in homebuilding operations | lot	500	500
Number of raw parcels of land owned | parcel	3	4
Carrying value of raw parcels of land	$ 38,857	$ 34,212
Aggregate additional funding commitments related to raw land property under joint development	7,300
Expected development credits that will offset the aggregate additional funding commitments related to raw land property development	$ 4,600

Capitalized Interest - Summary

Capitalized Interest - Summary of Interest Costs Incurred, Capitalized, Expensed and Charged to Cost of Sales (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Capitalized Interest Costs Including Allowance for Funds Used During Construction RollForward
Interest capitalized, beginning of year	$ 5,583	$ 5,106	$ 4,434
Interest incurred	26,277	26,384	25,951
Interest expense	(25,081)	(24,185)	(21,707)
Interest charged to cost of sales	(2,625)	(1,722)	(3,572)
Interest capitalized, end of year	$ 4,154	$ 5,583	$ 5,106

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail) - Elm Street	12 Months Ended
	Dec. 31, 2018USD ($)lot	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Related Party Transaction [Line Items]
Related party forward lot purchase agreements purchase price	$ 121,700,000
Number of related parties for forward lot purchase agreement | lot	1
Market price of developed lots	$ 36,100,000	$ 37,100,000	$ 44,500,000
Expected number of lots from joint venture with Elm Street | lot	2,300
Additional funding to joint venture by NVR and Elm Street		2,900,000
Development costs to manage property under related party transactions	$ 0	$ 0	$ 143,000

Property Plant and Equipment ("

Property Plant and Equipment ("PP&E") - Summary of Property Plant and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Homebuilding:
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 134,049	$ 130,468
Less: accumulated depreciation	(91,815)	(87,277)
Net Homebuilding PP&E	42,234	43,191
Homebuilding: | Office facilities and other
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	37,789	35,219
Homebuilding: | Model home furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	31,593	33,901
Homebuilding: | Production facilities
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	64,667	61,348
Mortgage Banking:
Property, Plant and Equipment [Line Items]
Net Homebuilding PP&E	6,510	6,327
Mortgage Banking: | Office facilities and other
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	13,724	14,069
Less: accumulated depreciation	(7,214)	(7,742)
Net Homebuilding PP&E	$ 6,510	$ 6,327

Debt - Additional Information (

Debt - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Senior Notes due 2022
Debt Instrument [Line Items]
Debt issuance date	Sep. 10, 2012
Senior notes principal amount	$ 600,000,000
Senior notes maturity date	Sep. 15, 2022
Senior notes effective interest rate	3.97%
Senior notes proceeds	$ 593,900,000
Senior notes interest rate	3.95%
Frequency of senior notes payment	semi-annually in arrears on March 15 and September 15
Debt issuance cost	$ 1,886,000	$ 2,395,000
Credit Agreement | Revolving Credit Facility
Debt Instrument [Line Items]
Maximum loan borrowing capacity	200,000,000
Increase in commitment available	$ 300,000,000
Line of credit facility, interest rate description	Borrowings under the Credit Agreement generally bear interest for Base Rate Loans at a Base Rate equal to the highest of (i) a Federal Funds Rate plus one-half of one percent, (ii) Bank of America’s publicly announced “prime rate,” and (iii) the Eurodollar Rate plus one percent, plus the Applicable Rate which is based on the Company’s debt rating, or for Eurodollar Rate Loans, at the Eurodollar Rate equal to LIBOR plus the Applicable Rate.
Expiration date	Jul. 15, 2021
Debt outstanding	$ 0
Credit Agreement | Revolving Credit Facility | Federal Funds Rate
Debt Instrument [Line Items]
Debt instrument, marginal interest rate	0.50%
Credit Agreement | Revolving Credit Facility | Eurodollar Rate
Debt Instrument [Line Items]
Debt instrument, marginal interest rate	1.00%
Credit Agreement | Revolving Credit Facility | Sublimit for Issuance of Letters of Credit
Debt Instrument [Line Items]
Maximum loan borrowing capacity	$ 100,000,000
Letters of credit outstanding	9,000,000
Credit Agreement | Revolving Credit Facility | Sublimit for Swing Line Commitment
Debt Instrument [Line Items]
Maximum loan borrowing capacity	$ 25,000,000
Repurchase Agreement | Revolving Credit Facility
Debt Instrument [Line Items]
Senior notes interest rate	4.5125%
Maximum loan borrowing capacity	$ 150,000,000
Expiration date	Jul. 24, 2019
Debt outstanding	$ 0	$ 0
Borrowing base limitations	$ 0
Repurchase Agreement | Revolving Credit Facility | Minimum
Debt Instrument [Line Items]
Senior notes interest rate	1.95%

Common Stock - Additional Infor

Common Stock - Additional Information (Detail) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Stockholders' Equity [Abstract]
Common shares outstanding (in Shares)	3,578	3,691
Reissued shares during the period, shares (in Shares)	188	165	83

Common Stock - Share Repurchase

Common Stock - Share Repurchase of Common Stock (Detail) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Stockholders' Equity [Abstract]
Aggregate purchase price	$ 846,134	$ 422,166	$ 455,351
Number of shares repurchased (in Shares)	301	167	280

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Remeasurement of net deferred tax assets due to enactment of Tax Cut and Jobs Act	$ (497)	$ 62,702	$ 0
Excess tax benefits from equity-based compensation	77,478	58,681	$ 0
Estimated federal taxable income	$ 636,849	$ 621,587
Statutory federal income tax rate	21.00%	35.00%	35.00%
Tax benefit from equity benefit plan activity			$ 13,661
Effective tax rate	16.94%	36.53%	35.73%
Unrecognized tax benefits that would affect effective tax rate	$ 34,300
Reversal of accrued interest on unrecognized tax benefits	1,384	$ 1,065	$ 1,582
Total accrued interest on unrecognized tax benefits	17,191	$ 18,575
Reduction in unrecognized tax benefits	$ 11,570

Income Taxes - Provision for In

Income Taxes - Provision for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current:
Federal	$ 126,358	$ 211,641	$ 209,454
State	37,038	37,006	38,095
Deferred:
Federal	138	60,785	(9,230)
State	(999)	(42)	(1,884)
Total	$ 162,535	$ 309,390	$ 236,435

Income Taxes - Income Tax Benef

Income Taxes - Income Tax Benefits in Shareholders' Equity (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Income tax benefits arising from compensation expense for tax purposes in excess of amounts recognized for financial statement purposes			$ 13,661
Effective Income Tax Rate Reconciliation, Tax Benefit from Stock Compensation	$ (77,478)	$ (58,681)	$ 0

Income Taxes - Deferred Income

Income Taxes - Deferred Income Taxes on Consolidated Balance Sheets (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred tax assets:
Other accrued expenses and contract land deposit reserve	$ 51,316	$ 49,063
Deferred compensation	4,693	4,743
Equity-based compensation expense	40,744	36,799
Inventory	9,242	9,393
Unrecognized tax benefit	13,587	14,351
Other	5,113	9,681
Total deferred tax assets	124,695	124,030
Less: Deferred tax liabilities	6,091	4,511
Net deferred tax asset	$ 118,604	$ 119,519

Income Taxes - Income Tax Expen

Income Taxes - Income Tax Expense Reconciliation (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Income taxes computed at the federal statutory rate	$ 201,544	$ 296,419	$ 231,595
State income taxes, net of federal income tax benefit	42,944	30,046	23,738
Excess tax benefits from equity-based compensation	77,478	58,681	0
Remeasurement of net deferred tax assets due to enactment of Tax Cut and Jobs Act	(497)	62,702	0
Other, net	(3,978)	(21,096)	(18,898)
Total	$ 162,535	$ 309,390	$ 236,435

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of year	$ 45,337	$ 46,110
Additions based on tax positions related to the current year	4,340	4,793
Reductions for tax positions of prior years	(6,259)	(5,566)
Settlements	0	0
Balance at end of year	$ 43,418	$ 45,337

Equity-Based Compensation, Pr_3

Equity-Based Compensation, Profit Sharing and Deferred Compensation Plans - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)compensation_planshares	Dec. 31, 2017USD ($)shares	Dec. 31, 2016USD ($)shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense | $	$ 75,701	$ 44,562	$ 43,598
Tax benefit related to equity-based compensation costs | $	$ 17,200	$ 17,100	$ 17,000
Options exercised (in shares)	188,000	165,000	83,000
Combined plan contribution | $	$ 19,500	$ 18,400	$ 16,700
Shares contributed to the Employee Stock Ownership Plan (in Shares)	7,000	6,000
Number of deferred compensation plans | compensation_plan	2
Common stock, shares held in rabbi trust, shares (in shares)	107,340	108,640
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options issued under the plan (in Shares)	16,000
Total unrecognized compensation cost for all outstanding Options and RSUs | $	$ 302,000
Weighted-average period over which the unrecognized compensation will be recorded	2 years 7 months 24 days
RSUs | Option Grant Solely Contingent upon Continued Employment or Continued Service as a Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted share units vesting period or option vesting period	2 years
Percentage of options vesting rights	50.00%
RSUs | Options Granted in Current Year | Share-based Compensation Award, Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option vesting rights	over two years in 50% increments on December 31, 2022 and 2023
Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of years for options granted	10 years
Options issued under the plan (in Shares)	345,000
Options | Option Grant Contingent upon Continued Employment or Service as a Director and Achievement of Performance Metric
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted share units vesting period or option vesting period	4 years
Percentage of options vesting rights	25.00%
Options | Option Grant Solely Contingent upon Continued Employment or Continued Service as a Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted share units vesting period or option vesting period	2 years
Percentage of options vesting rights	50.00%
Options | Share-based Compensation Award, Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of options vesting rights	50.00%
Options | Options Granted in Current Year | Option Grant Contingent upon Continued Employment or Service as a Director and Achievement of Performance Metric
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option vesting rights	over four years in 25% increments on December 31, 2020, 2021, 2022, and 2023
Options | Options Granted in Current Year | Option Grant Solely Contingent upon Continued Employment or Continued Service as a Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option vesting rights	over two years in 50% increments on December 31, 2020 and 2021
Employee Performance Based Stock Option [Member] | Option Grant Contingent upon Continued Employment or Service as a Director and Achievement of Performance Metric
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted share units vesting period or option vesting period	4 years
Percentage of options vesting rights	25.00%
Employee Performance Based Stock Option [Member] | Option Grant Solely Contingent upon Continued Employment or Continued Service as a Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted share units vesting period or option vesting period	2 years
Percentage of options vesting rights	50.00%
Employee Performance Based Stock Option [Member] | Share-based Compensation Award, Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of options vesting rights	50.00%
Employee Performance Based Stock Option [Member] | Options Granted in Current Year | Option Grant Contingent upon Continued Employment or Service as a Director and Achievement of Performance Metric
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option vesting rights	over four years in 25% increments on December 31, 2020, 2021, 2022, and 2023
Employee Performance Based Stock Option [Member] | Options Granted in Current Year | Option Grant Solely Contingent upon Continued Employment or Continued Service as a Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option vesting rights	over two years in 50% increments on December 31, 2020 and 2021
Performance Based Restricted Stock Unit [Member] | Option Grant Solely Contingent upon Continued Employment or Continued Service as a Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted share units vesting period or option vesting period	2 years
Percentage of options vesting rights	50.00%
Performance Based Restricted Stock Unit [Member] | Options Granted in Current Year | Share-based Compensation Award, Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option vesting rights	over two years in 50% increments on December 31, 2022 and 2023
Minimum | RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted share units vesting period or option vesting period	2 years
Minimum | Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted share units vesting period or option vesting period	3 years
Maximum | RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted share units vesting period or option vesting period	6 years
Maximum | Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted share units vesting period or option vesting period	6 years

Equity-Based Compensation, Pr_4

Equity-Based Compensation, Profit Sharing and Deferred Compensation Plans - Summary of Equity-Based Compensation Plans with Grants Outstanding (Detail) - shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares authorized	60,000,000	60,000,000
2000 Broadly-Based Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Authorized	2,000,000
Options/RSUs Outstanding	63,000
Shares Available to Issue	0
2010 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Authorized	700,000
Options/RSUs Outstanding	160,000
Shares Available to Issue	26,000
Granted (Shares)	6,000
2014 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Authorized	950,000
Options/RSUs Outstanding	701,000
Shares Available to Issue	102,000
Granted (Shares)	193,000
2018 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Authorized	275,000
Options/RSUs Outstanding	146,000
Shares Available to Issue	129,000
Granted (Shares)	146,000
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options issued under the plan (in Shares)	16,000
RSUs | 2010 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Authorized	240,000
Common stock, shares authorized	22,000
RSUs | 2018 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares authorized	40,000
Employee Service Only Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (Shares)	172,000
Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options issued under the plan (in Shares)	345,000
Granted (Shares)	345,000
Options | 2010 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (Shares)	6,000
Options | 2014 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (Shares)	93,000
Options | 2018 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (Shares)	73,000
Employee Performance Based Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (Shares)	173,000
Employee Performance Based Stock Option [Member] | 2010 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (Shares)	0
Employee Performance Based Stock Option [Member] | 2014 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (Shares)	100,000
Employee Performance Based Stock Option [Member] | 2018 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (Shares)	73,000
Option Grant Solely Contingent upon Continued Employment or Continued Service as a Director | RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted share units vesting period or option vesting period	2 years
Percentage of options vesting rights	50.00%
Option Grant Solely Contingent upon Continued Employment or Continued Service as a Director | Performance Based Restricted Stock Unit [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted share units vesting period or option vesting period	2 years
Percentage of options vesting rights	50.00%
Option Grant Solely Contingent upon Continued Employment or Continued Service as a Director | Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (Shares)	34,000
Restricted share units vesting period or option vesting period	2 years
Percentage of options vesting rights	50.00%
Option Grant Solely Contingent upon Continued Employment or Continued Service as a Director | Employee Performance Based Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (Shares)	34,000
Restricted share units vesting period or option vesting period	2 years
Percentage of options vesting rights	50.00%
Option Grant Contingent upon Continued Employment or Service as a Director and Achievement of Performance Metric | Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (Shares)	138,000
Restricted share units vesting period or option vesting period	4 years
Percentage of options vesting rights	25.00%
Option Grant Contingent upon Continued Employment or Service as a Director and Achievement of Performance Metric | Employee Performance Based Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (Shares)	139,000
Restricted share units vesting period or option vesting period	4 years
Percentage of options vesting rights	25.00%
Share-based Compensation Award, Tranche Three [Member] | Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of options vesting rights	50.00%
Share-based Compensation Award, Tranche Three [Member] | Employee Performance Based Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of options vesting rights	50.00%
Options Granted in Current Year | Option Grant Solely Contingent upon Continued Employment or Continued Service as a Director | Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option vesting rights	over two years in 50% increments on December 31, 2020 and 2021
Options Granted in Current Year | Option Grant Solely Contingent upon Continued Employment or Continued Service as a Director | Employee Performance Based Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option vesting rights	over two years in 50% increments on December 31, 2020 and 2021
Options Granted in Current Year | Option Grant Contingent upon Continued Employment or Service as a Director and Achievement of Performance Metric | Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option vesting rights	over four years in 25% increments on December 31, 2020, 2021, 2022, and 2023
Options Granted in Current Year | Option Grant Contingent upon Continued Employment or Service as a Director and Achievement of Performance Metric | Employee Performance Based Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option vesting rights	over four years in 25% increments on December 31, 2020, 2021, 2022, and 2023
Options Granted in Current Year | Share-based Compensation Award, Tranche Three [Member] | RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option vesting rights	over two years in 50% increments on December 31, 2022 and 2023
Options Granted in Current Year | Share-based Compensation Award, Tranche Three [Member] | Performance Based Restricted Stock Unit [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option vesting rights	over two years in 50% increments on December 31, 2022 and 2023

Equity-Based Compensation, Pr_5

Equity-Based Compensation, Profit Sharing and Deferred Compensation Plans - Summary of Equity-Based Compensation Plans with Grants Outstanding (Textual) (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares authorized	60,000,000	60,000,000
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 3,015.83
RSUs | Option Grant Solely Contingent upon Continued Employment or Continued Service as a Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of options vesting rights	50.00%
Restricted share units vesting period or option vesting period	2 years
Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding	1,049,000	916,000
Options | Option Grant Solely Contingent upon Continued Employment or Continued Service as a Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of options vesting rights	50.00%
Restricted share units vesting period or option vesting period	2 years
Options | Option Grant Contingent upon Continued Employment or Service as a Director and Achievement of Performance Metric
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of options vesting rights	25.00%
Restricted share units vesting period or option vesting period	4 years
2010 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized	700,000
Shares Available to Issue	26,000
2010 Plan | RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized	240,000
Restricted share units outstanding	21,000	10,000
Common stock, shares authorized	22,000
2010 Plan | Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding	139,000
2014 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized	950,000
Shares Available to Issue	102,000
2014 Plan | Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance metric period	3 years
2018 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized	275,000
Shares Available to Issue	129,000
2018 Plan | RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares authorized	40,000

Equity-Based Compensation, Pr_6

Equity-Based Compensation, Profit Sharing and Deferred Compensation Plans - Equity-Based Compensation Plans (Detail) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)$ / sharesshares
Stock Options
Stock Option, Shares
Outstanding at beginning of period (Shares)	916
Granted (Shares)	345
Exercised (Shares)	(182)
Forfeited (Shares)	(30)
Outstanding at end of period (Shares)	1,049
Exercisable at end of period (Shares)	466
Weighted Average Per Share Exercise Price
Outstanding at beginning of period (Weighted Average Exercise Price) | $ / shares	$ 1,119.92
Granted (Weighted Average Exercise Price) | $ / shares	3,013.61
Exercised (Weighted Average Exercise Price) | $ / shares	954.49
Forfeited (Weighted Average Exercise Price) | $ / shares	1,283.48
Outstanding at end of period (Weighted Average Exercise Price) | $ / shares	1,766.87
Exercisable at end of period (Weighted Average Exercise Price) | $ / shares	$ 1,032.44
Remaining Contractual Life and Aggregate Intrinsic Value
Outstanding at end of period (Weighted Average Remaining Contract Life (Years)	6 years 6 months
Exercisable at end of period (Weighted Average Remaining Contract Life (Years)	4 years 7 months
Outstanding at end of period (Aggregate Intrinsic Value) | $	$ 703,087
Exercisable at end of period (Aggregate Intrinsic Value) | $	$ 655,141
Employee Performance Based Stock Option [Member]
Stock Option, Shares
Granted (Shares)	173
2010 Plan
Stock Option, Shares
Granted (Shares)	6
RSU, Shares
Granted (Shares)	16
2010 Plan | Stock Options
Stock Option, Shares
Granted (Shares)	6
Outstanding at end of period (Shares)	139
2010 Plan | RSUs
RSU, Shares
Outstanding at beginning of period (Shares)	10
Granted (Shares)	16
Vested (Shares)	(5)
Forfeited (Shares)	0
Outstanding at end of period (Shares)	21
Vested, but not issued at end of period (Shares)	5
Remaining Contractual Life and Aggregate Intrinsic Value
Outstanding at end of period (Aggregate Intrinsic Value) | $	$ 50,719
Vested, but not issued at end of period (Aggregate Intrinsic Value) | $	$ 11,532
2010 Plan | Employee Performance Based Stock Option [Member]
Stock Option, Shares
Granted (Shares)	0
2010 Plan | Time Based Restricted Stock Unit [Member]
RSU, Shares
Granted (Shares)	8
2010 Plan | Performance Based Restricted Stock Unit [Member]
RSU, Shares
Granted (Shares)	8
2014 Plan
Stock Option, Shares
Granted (Shares)	193
RSU, Shares
Granted (Shares)	0
2014 Plan | Stock Options
Stock Option, Shares
Granted (Shares)	93
2014 Plan | RSUs
RSU, Shares
Granted (Shares)	0
2014 Plan | Employee Performance Based Stock Option [Member]
Stock Option, Shares
Granted (Shares)	100
2014 Plan | Performance Based Restricted Stock Unit [Member]
RSU, Shares
Granted (Shares)	0
2018 Plan
Stock Option, Shares
Granted (Shares)	146
RSU, Shares
Granted (Shares)	0
2018 Plan | Stock Options
Stock Option, Shares
Granted (Shares)	73
2018 Plan | RSUs
RSU, Shares
Granted (Shares)	0
2018 Plan | Employee Performance Based Stock Option [Member]
Stock Option, Shares
Granted (Shares)	73
2018 Plan | Performance Based Restricted Stock Unit [Member]
RSU, Shares
Granted (Shares)	0

Equity-Based Compensation, Pr_7

Equity-Based Compensation, Profit Sharing and Deferred Compensation Plans - Black-Scholes Option-Pricing Model Assumptions (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Estimated option life	5 years 23 days	5 years 3 months 4 days	5 years 3 months 7 days
Risk free interest rate (range), minimum	2.19%	1.53%	0.86%
Risk free interest rate (range), maximum	3.13%	2.38%	2.21%
Expected volatility (range), minimum	16.57%	15.09%	15.91%
Expected volatility (range), maximum	20.05%	17.95%	23.49%
Expected dividend rate	0.00%	0.00%	0.00%
Weighted average grant-date fair value per share of options granted	$ 687.81	$ 494.17	$ 320.21

Equity-Based Compensation, Pr_8

Equity-Based Compensation, Profit Sharing and Deferred Compensation Plans - Exercised Option Proceeds (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Aggregate exercise proceeds	$ 174,110	$ 140,525	$ 38,106
Aggregate intrinsic value on exercise dates	$ 355,318	$ 206,890	$ 96,600

Commitments and Contingent Li_3

Commitments and Contingent Liabilities - Future Minimum Lease Payments under Operating Leases (Detail) $ in Thousands	Dec. 31, 2018USD ($)
Commitments and Contingencies Disclosure [Abstract]
2,018	$ 31,564
2,019	22,210
2,020	17,331
2,021	13,667
2,022	10,324
Thereafter	12,607
Subtotal	107,703
Sublease income	(25)
Total minimum lease payments	$ 107,678

Commitments and Contingent Li_4

Commitments and Contingent Liabilities - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)lotcontract	Dec. 31, 2017USD ($)lot	Dec. 31, 2016USD ($)
Commitments And Contingencies [Line Items]
Rent expense under operating leases	$ 52,900	$ 49,400	$ 45,800
Maximum range of deposits required under the purchase agreements	10.00%
Contingent forfeitable deposits with land developers	$ 193,600
Number of specific performance contracts | contract	1
Finished lots committed to purchase under specific performance obligations | lot	10	10
Purchase price of finished lots committed to purchase under specific performance obligations	$ 1,505	$ 1,505
Aggregate additional funding commitments related to raw land property development	7,300
Expected development credit offset amount	4,600
Contingent obligations under bonds or letters of credit arrangements	37,600
Credit Agreement
Commitments And Contingencies [Line Items]
Contingent obligations under letters of credit arrangements	$ 9,000

Commitments and Contingent Li_5

Commitments and Contingent Liabilities - Summary of Changes in Product Warranty/Liability Reserve (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Movement in Warranty Reserve [Roll Forward]
Warranty reserve, beginning of year	$ 94,513	$ 93,895	$ 87,407
Provision	62,553	44,652	50,787
Payments	(53,366)	(44,034)	(44,299)
Warranty reserve, end of year	$ 103,700	$ 94,513	$ 93,895

Fair Value - Additional Informa

Fair Value - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fair value measurement gain/(loss)	$ 14,309	$ 5,824
Homebuilding:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior Notes	597,681	597,066
Homebuilding: | Senior Notes due 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior Notes	597,681	597,066
Homebuilding: | Level 2 | Fair Value, Measurements, Recurring | Senior Notes due 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior Notes fair value	594,000	630,000
Mortgage Banking:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of mortgage loans held for sale	458,324	352,489
Mortgage Banking: | Level 2 | Not Designated as Hedging Instrument
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value adjustment income (expense)	8,485	(1,638)	$ 3,147
Mortgage Banking: | Level 2 | Fair Value, Measurements, Recurring | Rate lock commitments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notional amount of contractual commitments	682,152
Total fair value measurement gain/(loss)	13,486
Mortgage Banking: | Level 2 | Fair Value, Measurements, Recurring | Forward sales contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notional amount of contractual commitments	1,089,923
Total fair value measurement gain/(loss)	(10,057)
Mortgage Banking: | Level 2 | Fair Value, Measurements, Recurring | Mortgages held for sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notional amount of contractual commitments	447,444	350,558
Fair value of mortgage loans held for sale	458,324	352,489
Total fair value measurement gain/(loss)	$ 10,880	$ (1,931)

Fair Value - Undesignated Deriv

Fair Value - Undesignated Derivative Instruments (Detail) - Mortgage Banking: - Level 2 - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Rate lock commitments
Derivatives, Fair Value [Line Items]
Gross assets	$ 13,831	$ 5,400
Gross liabilities	345	1,832
Net commitments	13,486	3,568
Forward sales contracts
Derivatives, Fair Value [Line Items]
Gross assets	64	992
Gross liabilities	10,121	667
Net commitments	$ (10,057)	$ 325

Fair Value - Fair Value Measure

Fair Value - Fair Value Measurement (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assumed Gain/(Loss) From Loan Sale	$ 2,627
Interest Rate Movement Effect	8,267
Servicing Rights Value	13,472
Security Price Change	(10,057)
Total Fair Value Measurement Gain/(Loss)	14,309	$ 5,824
Mortgage Banking: | Level 2 | Fair Value, Measurements, Recurring | Rate lock commitments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notional or Principal Amount	682,152
Assumed Gain/(Loss) From Loan Sale	1,360
Interest Rate Movement Effect	4,630
Servicing Rights Value	7,496
Security Price Change	0
Total Fair Value Measurement Gain/(Loss)	13,486
Mortgage Banking: | Level 2 | Fair Value, Measurements, Recurring | Forward sales contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notional or Principal Amount	1,089,923
Assumed Gain/(Loss) From Loan Sale	0
Interest Rate Movement Effect	0
Servicing Rights Value	0
Security Price Change	(10,057)
Total Fair Value Measurement Gain/(Loss)	(10,057)
Mortgage Banking: | Level 2 | Fair Value, Measurements, Recurring | Mortgages held for sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notional or Principal Amount	447,444	350,558
Assumed Gain/(Loss) From Loan Sale	1,267
Interest Rate Movement Effect	3,637
Servicing Rights Value	5,976
Security Price Change	0
Total Fair Value Measurement Gain/(Loss)	$ 10,880	$ (1,931)

Mortgage Loan Losses Allowance

Mortgage Loan Losses Allowance - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Mortgage Repurchase Reserve [Abstract]
Pre-tax charges for loan losses related to mortgage loans sold	$ 3,200	$ 2,900	$ 2,000
Mortgage repurchase reserve	$ 15,600	$ 14,000

Quarterly Results (unaudited) -

Quarterly Results (unaudited) - Quarterly Financial Data and Operating Information (Detail) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018USD ($)SettlementsBacklogorder$ / shares	Sep. 30, 2018USD ($)SettlementsBacklogorder$ / shares	Jun. 30, 2018USD ($)SettlementsBacklogorder$ / shares	Mar. 31, 2018USD ($)SettlementsBacklogorder$ / shares	Dec. 31, 2017USD ($)SettlementsBacklogorder$ / shares	Sep. 30, 2017USD ($)SettlementsBacklogorder$ / shares	Jun. 30, 2017USD ($)SettlementsBacklogorder$ / shares	Mar. 31, 2017USD ($)SettlementsBacklogorder$ / shares	Dec. 31, 2018USD ($)$ / shares	Dec. 31, 2017USD ($)$ / shares	Dec. 31, 2016USD ($)$ / shares
Quarterly Financial Information [Line Items]
Mortgage banking fees									$ 7,163,674	$ 6,305,840	$ 5,822,544
Net income	$ 232,158	$ 195,816	$ 203,174	$ 166,049	$ 124,619	$ 162,102	$ 147,877	$ 102,923	$ 797,197	$ 537,521	$ 425,262
Diluted earnings per share (USD per share) | $ / shares	$ 58.57	$ 48.28	$ 49.05	$ 39.34	$ 28.88	$ 38.02	$ 35.19	$ 25.12	$ 194.80	$ 126.77	$ 103.61
New orders (units) | order	3,841	4,302	4,964	5,174	4,306	4,200	4,678	4,424
Settlements (units) | Settlements	5,186	4,754	4,611	3,896	4,630	4,158	3,917	3,256
Backlog, end of period (units) | Backlog	8,365	9,710	10,162	9,809	8,531	8,855	8,813	8,052
Loans closed	$ 1,356,430	$ 1,249,199	$ 1,214,101	$ 1,009,673	$ 1,229,695	$ 1,115,494	$ 1,041,613	$ 843,341
Homebuilding:
Quarterly Financial Information [Line Items]
Gross profit – homebuilding operations	363,668	336,696	333,666	278,147	343,187	325,755	294,631	221,570
Mortgage banking fees	1,954,403	1,809,345	1,750,463	1,490,093	1,781,494	1,633,726	1,512,714	1,247,587	$ 7,004,304	$ 6,175,521	$ 5,709,223
Mortgage Banking:
Quarterly Financial Information [Line Items]
Mortgage banking fees	$ 40,145	$ 43,062	$ 36,842	$ 39,321	$ 34,842	$ 34,194	$ 31,778	$ 29,505	$ 159,370	$ 130,319	$ 113,321