Loans Receivable - Schedule of Loans Receivable Internal Ratings (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment [Line Items]
Percentage of Loan Portfolio	100.00%
Loans receivable, net	$ 38,691	$ 313,326
Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, net	38,691
Watch List Loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, net	0
Workout Loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, net	$ 0
Real Estate Secured
Financing Receivable, Recorded Investment [Line Items]
Percentage of Loan Portfolio	43.00%
Loans receivable, net	$ 16,611	188,418
Real Estate Secured | Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, net	16,611
Real Estate Secured | Watch List Loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, net	0
Real Estate Secured | Workout Loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, net	$ 0
Other Secured
Financing Receivable, Recorded Investment [Line Items]
Percentage of Loan Portfolio	57.00%
Loans receivable, net	$ 22,080	$ 124,908
Other Secured | Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, net	22,080
Other Secured | Watch List Loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, net	0
Other Secured | Workout Loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, net	$ 0