Condensed Consolidated Statements of Income (USD $) In Thousands, except Per 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	$ (5,374)		$ (10,940)
Income before taxes	80,181	63,955	135,286	94,913
Income tax expense	(29,491)	(17,117)	(49,555)	(27,952)
Net income	50,690	46,838	85,731	66,961
Basic earnings per share	$ 10.37	$ 9.17	$ 17.38	$ 13.19
Diluted earnings per share	$ 10.11	$ 8.97	$ 16.92	$ 12.90
Basic weighted average shares outstanding	4,889	5,106	4,934	5,075
Diluted weighted average shares outstanding	5,013	5,221	5,067	5,191
Homebuilding [Member]
Revenues	992,210	755,290	1,743,078	1,341,485
Other income	1,098	538	2,124	1,446
Cost of sales	(834,288)	(624,978)	(1,458,373)	(1,116,807)
Selling, general and administrative	(82,120)	(73,754)	(160,533)	(145,930)
Operating income	76,900	57,096	126,296	80,194
Interest expense	(5,237)	(112)	(10,689)	(228)
Income before taxes	71,663	56,984	115,607	79,966
Mortgage Banking [Member]
Mortgage banking fees	17,682	14,493	37,070	28,790
Interest income	1,047	815	2,002	2,480
Other income	178	136	291	212
General and administrative	(10,252)	(8,327)	(19,433)	(16,240)
Interest expense	(137)	(146)	(251)	(295)
Income before taxes	$ 8,518	$ 6,971	$ 19,679	$ 14,947