Consolidated Statements of Operations and Comprehensive Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Interest expense	$ (909)		$ (1,726)	$ (808)
Income (loss) before income taxes	38,012	9,655	60,598	11,780
Benefit from income taxes	186,897	983	186,827	1,123
Net income	224,909	10,638	247,425	12,903
Other comprehensive income (loss):
Unrealized gain (loss) related to available-for-sale securities, net of tax	(1,995)	(698)	540	5,850
Comprehensive income	222,914	9,940	247,965	18,753
Earnings per share:
Basic	$ 4.60	$ 0.22	$ 5.07	$ 0.27
Diluted	$ 4.56	$ 0.22	$ 5.02	$ 0.27
Weighted average common shares outstanding:
Basic	48,447,005	47,398,088	48,410,486	47,367,051
Diluted	48,914,984	47,516,258	48,916,988	47,462,544
Dividends declared per share		$ 0.25		$ 0.50
Homebuilding [Member]
Home sale revenues	400,327	256,532	732,075	441,210
Land sale revenues	1,807	1,815	1,807	3,405
Total home sale and land revenues	402,134	258,347	733,882	444,615
Home cost of sales	(327,927)	(220,220)	(602,003)	(378,874)
Land cost of sales	(1,435)	(1,718)	(1,435)	(3,208)
Total cost of sales	(329,362)	(221,938)	(603,438)	(382,082)
Gross margin	72,772	36,409	130,444	62,533
Selling, general and administrative expenses	(51,908)	(39,223)	(100,109)	(73,347)
Interest income	8,504	5,373	14,686	11,286
Interest expense	(909)		(1,726)	(808)
Other income (expense)	1,330	418	1,341	576
Income (loss) before income taxes	29,789	2,977	44,636	240
Financial Services [Member]
Revenues	13,884	10,587	26,390	18,306
Expenses	(6,581)	(4,640)	(12,223)	(8,305)
Interest and other income	920	731	1,795	1,539
Income (loss) before income taxes	$ 8,223	$ 6,678	$ 15,962	$ 11,540