Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities:
Net income	$ 447,221	$ 602,703	$ 494,090
Adjustments to reconcile net income to net cash from operating activities:
Deferred income tax expense	422,307	334,787	311,699
Land-related charges	191,913	19,357	11,467
Depreciation and amortization	50,998	54,007	46,222
Share-based compensation expense	33,683	22,228	24,752
Loss on debt retirements	0	657	0
Other, net	(1,789)	1,614	(4,865)
Increase (decrease) in cash due to:
Inventories	(569,030)	(897,092)	(917,298)
Residential mortgage loans available-for-sale	(33,009)	(99,527)	(104,609)
Other assets	55,099	(45,721)	(175,150)
Accounts payable, accrued and other liabilities	65,684	75,257	(23,898)
Net cash provided by (used in) operating activities	663,077	68,270	(337,590)
Cash flows from investing activities:
Capital expenditures	(32,051)	(39,295)	(45,440)
Investment in unconsolidated subsidiaries	(23,037)	(14,539)	(454)
Cash used for business acquisition	0	(430,458)	0
Other investing activities, net	4,846	13,100	11,330
Net cash used in investing activities	(50,242)	(471,192)	(34,564)
Cash flows from financing activities:
Proceeds from debt issuance	0	1,995,937	498,087
Repayments of debt	(134,747)	(986,919)	(239,193)
Borrowings under revolving credit facility	2,720,000	619,000	125,000
Repayments under revolving credit facility	(2,720,000)	(619,000)	(125,000)
Financial Services borrowings, net	106,183	63,744	127,636
Stock option exercises	27,720	5,845	10,535
Share repurchases	(916,323)	(603,206)	(442,738)
Dividends paid	(112,748)	(124,666)	(115,958)
Net cash provided by (used in) financing activities	(1,029,915)	350,735	(161,631)
Net increase (decrease)	(417,080)	(52,187)	(533,785)
Cash, cash equivalents, and restricted cash at beginning of period	723,248	775,435	1,309,220
Cash, cash equivalents, and restricted cash at end of period	306,168	723,248	775,435
Supplemental Cash Flow Information:
Interest paid (capitalized), net	(942)	(26,538)	(4,193)
Income taxes paid (refunded), net	$ 14,875	$ 2,743	$ (5,654)