Inventories - Schedule of Inventory Table (Detail) (Homebuilding [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Inventories [Line Items]
Total Inventories	$ 1,002,521	$ 806,052
West [Member]
Inventories [Line Items]
Housing completed or under construction	200,858	121,343
Land and land under development	230,344	199,941
Mountain [Member]
Inventories [Line Items]
Housing completed or under construction	183,522	80,964
Land and land under development	137,221	164,961
East [Member]
Inventories [Line Items]
Housing completed or under construction	128,569	98,407
Land and land under development	122,007	140,436
Subtotal [Member]
Inventories [Line Items]
Housing completed or under construction	512,949	300,714
Land and land under development	$ 489,572	$ 505,338