Capitalization of Interest - Interest Activity (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Income Statement [Abstract]
Homebuilding interest incurred	$ 14,339	$ 10,593
Less: Interest capitalized	(13,522)	(9,785)
Homebuilding interest expense	817	808
Interest capitalized, beginning of period	69,143	58,742
Interest capitalized during period	13,522	9,785
Less: Previously capitalized interest included in home cost of sales	(9,874)	(4,894)
Interest capitalized, end of period	$ 72,791	$ 63,633