Summary Of Impairment Of Inventory (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2011	Dec. 31, 2011
Inventories [Line Items]
Asset impairment	$ 851,753	$ 8,633	$ 8,633	$ 806,052
Housing Completed Or Under Construction [Member] | West [Member]
Inventories [Line Items]
Asset impairment	178,425	954	954	121,343
Housing Completed Or Under Construction [Member] | Mountain [Member]
Inventories [Line Items]
Asset impairment	142,118	239	239	80,964
Housing Completed Or Under Construction [Member] | East [Member]
Inventories [Line Items]
Asset impairment	97,774			81,623
Housing Completed Or Under Construction [Member] | Subtotal [Member]
Inventories [Line Items]
Asset impairment	437,287	1,193	1,193	300,714
Land And Land Under Development [Member] | West [Member]
Inventories [Line Items]
Asset impairment	149,579	5,919	5,919	199,941
Land And Land Under Development [Member] | Mountain [Member]
Inventories [Line Items]
Asset impairment	134,172	1,236	1,236	164,961
Land And Land Under Development [Member] | East [Member]
Inventories [Line Items]
Asset impairment	120,657	285	285	127,291
Land And Land Under Development [Member] | Subtotal [Member]
Inventories [Line Items]
Asset impairment	$ 414,466	$ 7,440	$ 7,440	$ 505,338