Variable Interest Entity Disclosure (Details) - Variable Interest Entity, Primary Beneficiary [Member] - USD ($) $ in Thousands		Mar. 31, 2018	Dec. 31, 2017
Variable Interest Entity [Line Items]
Total assets	[1]	$ 1,027,225	$ 1,030,775
Total equity		369,932	372,942
Total liabilities and equity		1,027,225	1,030,775
Net real property owned [Member]
Variable Interest Entity [Line Items]
Total assets		993,156	1,002,137
Cash and cash equivalents [Member]
Variable Interest Entity [Line Items]
Total assets		16,871	12,308
Receivables and other assets [Member]
Variable Interest Entity [Line Items]
Total assets		17,198	16,330
Secured Debt [Member]
Variable Interest Entity [Line Items]
Liabilities		469,757	471,103
Accrued expenses and other liabilities [Member]
Variable Interest Entity [Line Items]
Liabilities		16,501	14,832
Redeemable noncontrolling interests [Member]
Variable Interest Entity [Line Items]
Liabilities		$ 171,035	$ 171,898

[1] Note that assets of the consolidated VIEs can only be used to settle obligations relating to such VIEs. Liabilities of the consolidated VIEs represent claims against the specific assets of the VIEs.