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Investment in Unconsolidated Joint Ventures (CL Realty, L.L.C.) (Details) - CL Realty, L.L.C.
$ in Thousands
Dec. 31, 2016
USD ($)
parcel
Schedule of Equity Method Investments [Line Items]  
Ownership percentage of partner in joint venture 50.00%
Cash balance of joint venture | $ $ 502
Land  
Schedule of Equity Method Investments [Line Items]  
Number of parcel of land | parcel 1
Forestar  
Schedule of Equity Method Investments [Line Items]  
Ownership percentage of partner in joint venture 50.00%