Capitalization of Interest - Interest Activity (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Interest Costs Incurred Capitalized [Abstract]
Homebuilding interest incurred	$ 15,345	$ 10,573	$ 29,684	$ 21,166
Less: Interest capitalized	(14,436)	(10,573)	(27,958)	(20,358)
Homebuilding interest expense	909		1,726	808
Interest capitalized, beginning of period	72,791	63,633	69,143	58,742
Interest capitalized during period	14,436	10,573	27,958	20,358
Less: Previously capitalized interest included in home cost of sales	(12,680)	(7,105)	(22,554)	(11,999)
Interest capitalized, end of period	$ 74,547	$ 67,101	$ 74,547	$ 67,101