Consolidated Statements of Operations and Comprehensive Income (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Inventory impairments	$ (1,800)		$ (1,100)
Interest expense	(685)	(1,726)	(808)
Losses from early extinguishments of debt	(18,153)
Other-than-temporary impairment of marketable securities	(4,293)
Income (loss) before income taxes	100,475	129,825	61,115
Benefit from (provision for) income taxes	(37,332)	184,560	1,584
Net income	63,143	314,385	62,699
Other comprehensive income (loss) related to available-for-sale securities, net of tax	(1,120)	6,737	12,078
Comprehensive income	62,023	321,122	74,777
Basic (in Dollars per share)	$ 1.29	$ 6.39	$ 1.29
Diluted (in Dollars per share)	$ 1.29	$ 6.34	$ 1.29
Basic (in Shares)	48,615,541	48,453,119	47,660,629
Diluted (in Shares)	48,817,566	48,831,785	47,834,156
Homebuilding [Member]
Home sale revenues	1,647,398	1,626,707	1,150,998
Land sale revenues	3,233	2,468	5,144
Total home and land sale revenues	1,650,631	1,629,175	1,156,142
Home cost of sales	(1,365,621)	(1,336,978)	(973,120)
Land cost of sales	(2,559)	(1,961)	(4,823)
Inventory impairments	(1,760)	(919)	(1,105)
Total cost of sales	(1,369,940)	(1,339,858)	(979,048)
Gross margin	280,691	289,317	177,094
Selling, general and administrative expenses	(203,253)	(213,283)	(167,295)
Interest and other income	26,310	29,798	24,998
Interest expense	(685)	(1,726)	(808)
Other expense	(4,813)	(3,783)	(1,372)
Losses from early extinguishments of debt	(18,153)
Other-than-temporary impairment of marketable securities	(4,293)
Income (loss) before income taxes	75,804	100,323	32,617
Financial Services [Member]
Income (loss) before income taxes	24,671	29,502	28,498
Revenues	43,953	51,259	46,881
Expenses	(22,334)	(25,271)	(21,645)
Interest and other income	$ 3,052	$ 3,514	$ 3,262