Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues	$ 1,141,274	$ 748,395	$ 698,714	$ 494,632	$ 1,132,697	$ 775,071	$ 771,303	$ 583,676	$ 3,083,015	$ 3,262,747	$ 2,810,272
Other operations expense									2,434	3,174	2,298
Sales and marketing									195,148	187,267	137,066
General and administrative									157,161	155,030	137,764
Homebuilding income from operations									253,859	353,204	343,634
Equity loss of unconsolidated entities									(52)	(393)	(11,433)
Other income (loss), net									6,857	(419)	151
Homebuilding income before income taxes									260,664	352,392	332,352
Equity in income of unconsolidated entities									9,316	8,517	6,426
Financial services income before income taxes									10,423	9,673	7,466
Income before income taxes									271,087	362,065	339,818
Provision for income taxes									(63,900)	(90,552)	(152,267)
Net income	117,993	62,861	26,262	71	100,984	63,969	63,680	42,880	207,187	271,513	187,551
Net income attributable to noncontrolling interests	0	0	0	0	(1,602)	0	0	0	0	(1,602)	(360)
Net income available to common stockholders	$ 117,993	$ 62,861	$ 26,262	$ 71	$ 99,382	$ 63,969	$ 63,680	$ 42,880	$ 207,187	$ 269,911	$ 187,191
Earnings per share
Basic (in dollars per share)	$ 0.85	$ 0.45	$ 0.18	$ 0	$ 0.70	$ 0.43	$ 0.42	$ 0.28	$ 1.47	$ 1.82	$ 1.21
Diluted (in dollars per share)	$ 0.85	$ 0.44	$ 0.18	$ 0	$ 0.70	$ 0.43	$ 0.42	$ 0.28	$ 1.47	$ 1.81	$ 1.21
Weighted average shares outstanding
Basic (shares)									140,851,444	148,183,431	154,134,411
Diluted (shares)									141,394,227	149,004,690	155,085,366
Home sales
Home sales									$ 3,069,375	$ 3,244,087	$ 2,732,299
Cost of home sales									2,462,708	2,536,899	2,173,251
Land and lot sales
Home sales									7,176	8,758	74,269
Cost of home sales									7,711	25,435	14,888
Other operations
Revenues									2,470	8,164	2,333
Homebuilding
Revenues									3,079,021	3,261,009	2,808,901
Financial services
Revenues									3,994	1,738	1,371
Cost of home sales									$ 2,887	$ 582	$ 331