Fair Value (Details) - Unobservable Inputs Used In The Valuation of CDOs	6 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Probability of prepayment	1.80%	1.80%
Probability of default	18.70%	19.10%
Loss given default	92.80%	93.80%
Probability of deferral cure	20.60%	15.20%
Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Probability of prepayment	15.10%	15.10%
Probability of default	49.70%	32.60%
Loss given default	98.40%	97.10%
Probability of deferral cure	100.00%	63.10%