Fair Value of Financial Instruments Table of Significant Observable Inputs used in the Valuation of Nonperforming Loans (Details) - Nonperforming Financial Instruments - Investment in Loans - Significant unobservable inputs Level 3 - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015
Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rate		30.00%	30.00%
Loan resolution time-line (Years)		2 years 3 months 17 days	2 years 8 months 12 days
Value of underlying properties		$ 1,800	$ 1,375
Holding costs		24.10%	24.60%
Liquidation costs		25.00%	21.80%
Fair Value Inputs, Note Rate		6.00%	6.00%
Fair Value Inputs, Secondary Market Transaction Prices		88.50%	88.50%
Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rate		16.00%	15.10%
Loan resolution time-line (Years)		5 months 30 days	7 months 6 days
Value of underlying properties		$ 32	$ 40
Holding costs		5.40%	5.50%
Liquidation costs		8.50%	7.50%
Fair Value Inputs, Note Rate		3.00%	3.00%
Fair Value Inputs, Secondary Market Transaction Prices		75.50%	72.00%
Weighted Average
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rate	[1]	22.90%	22.00%
Loan resolution time-line (Years)	[1]	1 year 2 months 12 days	1 year 2 months 12 days
Value of underlying properties	[1]	$ 234	$ 220
Holding costs	[1]	8.30%	9.60%
Liquidation costs	[1]	9.60%	10.50%
Fair Value Inputs, Note Rate	[1]	4.80%	4.40%
Fair Value Inputs, Secondary Market Transaction Prices	[1]	83.70%	73.30%

[1] Weighted based on value of underlying properties.