Impairment Charges - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Schedule of Fair Values of Plan Assets [Line Items]
Impairment charge			$ 35,091
Impairment losses through equity in earnings of unconsolidated entities	7,995	1,001	18,739
Austin Condominium Project [Member]
Schedule of Fair Values of Plan Assets [Line Items]
Impairment charge			34,691
Citrus Park Land Parcel [Member]
Schedule of Fair Values of Plan Assets [Line Items]
Impairment charge			400
Atlanta Condominium Project [Member] | Impairment Loss [Member]
Schedule of Fair Values of Plan Assets [Line Items]
Impairment losses through equity in earnings of unconsolidated entities			$ 5,492