Variable Interest Entity Disclosure (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Variable Interest Entity [Line Items]
Total assets	$ 1,019,433	$ 1,030,775
Total equity	536,119	544,840
Total liabilities and equity	1,019,433	1,030,775
Net real property owned
Variable Interest Entity [Line Items]
Total assets	983,005	1,002,137
Cash and cash equivalents
Variable Interest Entity [Line Items]
Total assets	21,360	12,308
Receivables and other assets
Variable Interest Entity [Line Items]
Total assets	15,068	16,330
Secured Debt
Variable Interest Entity [Line Items]
Liabilities	468,104	471,103
Accrued expenses and other liabilities
Variable Interest Entity [Line Items]
Liabilities	$ 15,210	$ 14,832