Consolidated Statements of Operations and Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues	$ 3,293,253	$ 3,065,216	$ 2,577,614
Inventory impairments	(935)	(21,850)	(10,010)
Pretax income	304,989	263,854	229,732
Provision for income taxes	(66,677)	(53,074)	(87,897)
Net income	238,312	210,780	141,835
Other comprehensive loss related to available-for-sale securities, net of tax	0	0	(18,079)
Comprehensive income	$ 238,312	$ 210,780	$ 123,756
Earnings per share:
Basic (in dollars per share)	$ 3.84	$ 3.46	$ 2.35
Diluted (in dollars per share)	$ 3.72	$ 3.39	$ 2.30
Weighted average common shares outstanding
Basic (in shares)	61,616,988	60,571,123	60,117,021
Diluted (in shares)	63,702,666	61,830,761	61,453,578
Homebuilding Segment [Member]
Revenues	$ 3,205,248	$ 2,981,811	$ 2,503,242
Cost of sales	(2,601,131)	(2,436,989)	(2,088,283)
Inventory impairments	(935)	(21,850)	(10,010)
Gross margin	604,117	544,822	414,959
Selling, general and administrative expenses	(362,790)	(329,801)	(287,488)
Interest and other income	9,070	7,718	61,336
Other expense	(5,635)	(5,245)	(2,868)
Pretax income	244,762	217,494	185,939
Other comprehensive loss related to available-for-sale securities, net of tax	0	0	(18,079)
Homebuilding Segment [Member] | Home Building [Member]
Revenues	3,205,248	2,981,811	2,498,695
Cost of sales	(2,600,196)	(2,415,139)	(2,073,833)
Homebuilding Segment [Member] | Land [Member]
Revenues	0	0	4,547
Cost of sales	0	0	(4,440)
Financial Services Segment [Member]
Revenues	88,005	83,405	74,372
Interest and other income	17,223	1,155	3,955
Pretax income	60,227	46,360	43,793
Expenses	(45,001)	(38,200)	(34,534)
Other income (expense), net	$ 17,223	$ 1,155	$ 3,955