Investment in Unconsolidated Joint Ventures (CL Realty, L.L.C.) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012 Venture
CL Realty
Schedule of Equity Method Investments [Line Items]
Number of joint ventures (ventures)	2
Share of impairment charges	$ 13,600,000
Cash balance of joint venture	$ 699,000
Forestar [Member] | CL Realty
Schedule of Equity Method Investments [Line Items]
Investment by third party in joint venture (percent)	50.00%
Residential Real Estate [Member] | CL Realty
Schedule of Equity Method Investments [Line Items]
Number of joint ventures (ventures)	1
TEXAS
Schedule of Equity Method Investments [Line Items]
Number of real estate properties owned by venture (properties)	1