Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities:
Net income	$ 1,406,839	$ 1,016,700	$ 1,022,023
Adjustments to reconcile net income to net cash from operating activities:
Deferred income tax expense	137,598	105,438	362,777
Land-related charges	20,305	27,101	99,446
Goodwill impairment	20,190	0	0
Depreciation and amortization	66,081	53,999	49,429
Share-based compensation expense	32,843	28,368	28,290
Loss on debt retirements	0	4,927	76
Other, net	(1,112)	1,155	(3,688)
Increase (decrease) in cash due to:
Inventories	2,988	(237,741)	(50,362)
Residential mortgage loans available-for-sale	(56,732)	(48,261)	107,330
Other assets	(46,307)	(16,668)	(65,641)
Accounts payable, accrued and other liabilities	201,649	140,984	(101,400)
Net cash provided by operating activities	1,784,342	1,076,002	1,448,280
Cash flows from investing activities:
Capital expenditures	(58,354)	(58,119)	(59,039)
Investments in unconsolidated entities	(753)	(9,515)	(1,000)
Distributions of capital from unconsolidated entities	27,939	214	11,275
Business acquisitions	(83,251)	(163,724)	0
Other investing activities, net	6,472	6,458	8,289
Net cash used in investing activities	(107,947)	(224,686)	(40,475)
Cash flows from financing activities:
Debt issuance costs	0	0	(8,164)
Repayments of notes payable	(65,267)	(309,985)	(82,775)
Borrowings under revolving credit facility	700,000	0	1,566,000
Repayments under revolving credit facility	(700,000)	0	(1,566,000)
Financial Services borrowings (repayments), net	85,248	(21,841)	(89,393)
Stock option exercises	111	6,399	6,555
Share repurchases	(170,676)	(274,333)	(294,566)
Cash paid for shares withheld for taxes	(14,853)	(11,450)	(7,910)
Dividends paid	(130,179)	(122,350)	(104,020)
Net cash used in financing activities	(295,616)	(733,560)	(580,273)
Net increase	1,380,779	117,756	827,532
Cash, cash equivalents, and restricted cash at beginning of period	1,251,456	1,133,700	306,168
Cash, cash equivalents, and restricted cash at end of period	2,632,235	1,251,456	1,133,700
Supplemental Cash Flow Information:
Interest paid (capitalized), net	3,057	5,605	557
Income taxes paid, net	$ 264,248	$ 137,119	$ 89,204