Investments in Affiliates - Consolidated Real Estate Entities (Details) - Joint Venture Unconsolidated [Member] - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Variable Interest Entity, Not Primary Beneficiary [Member]
Equity Method Investment, Summarized Financial Information, Assets	$ 23,700
Texas [Member] | Variable Interest Entity, Not Primary Beneficiary [Member] | Residential real estate [Member] | Real Estate Entities [Member]
Equity Method Investments	18,500	$ 16,500
Other Affiliates [Member]
Equity Method Investments	33,182	32,361
Equity Method Investment, Summarized Financial Information, Assets	175,477	$ 170,174
Minimum [Member] | Variable Interest Entity, Not Primary Beneficiary [Member] | Real Estate Entities [Member]
Equity Method Investment, Summarized Financial Information, Assets	1,700
Maximum [Member] | Variable Interest Entity, Not Primary Beneficiary [Member] | Real Estate Entities [Member]
Equity Method Investment, Summarized Financial Information, Assets	$ 61,400