Valuation (Schedule Of Significant Unobservable Inputs, Qualitative Information) (Details) - USD ($)		9 Months Ended		12 Months Ended
		Sep. 30, 2015		Dec. 31, 2014
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Securitized debt		$ 503,000		$ 774,000
Level 3 [Member] | Market Approach Valuation Technique [Member] | Asset-backed Securities backed by consumer loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value	[1]			$ 1,344,000
Level 3 [Member] | Market Approach Valuation Technique [Member] | Asset-backed Securities backed by consumer loans [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Non Binding Third-Party Valuation	[1]			100.00
Level 3 [Member] | Market Approach Valuation Technique [Member] | Asset-backed Securities backed by consumer loans [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Non Binding Third-Party Valuation	[1]			100.00
Level 3 [Member] | Market Approach Valuation Technique [Member] | Asset-backed Securities backed by consumer loans [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Non Binding Third-Party Valuation	[1]			100.00
Level 3 [Member] | Market Approach Valuation Technique [Member] | Corporate Debt and non-exchange traded corporate equity [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value		$ 23,798,000
Level 3 [Member] | Market Approach Valuation Technique [Member] | Corporate Debt and non-exchange traded corporate equity [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Non Binding Third-Party Valuation		3.00
Level 3 [Member] | Market Approach Valuation Technique [Member] | Corporate Debt and non-exchange traded corporate equity [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Non Binding Third-Party Valuation		200.00
Level 3 [Member] | Market Approach Valuation Technique [Member] | Corporate Debt and non-exchange traded corporate equity [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Non Binding Third-Party Valuation		68.31
Level 3 [Member] | Market Approach Valuation Technique [Member] | Private Label Residential Mortgage Backed Securities and Securitized Debt [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value		$ 104,505,000	[2]	$ 201,373,000	[3]
Level 3 [Member] | Market Approach Valuation Technique [Member] | Private Label Residential Mortgage Backed Securities and Securitized Debt [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Non Binding Third-Party Valuation		1.84	[2]	1.83	[3]
Level 3 [Member] | Market Approach Valuation Technique [Member] | Private Label Residential Mortgage Backed Securities and Securitized Debt [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Non Binding Third-Party Valuation		114.86	[2]	119.58	[3]
Level 3 [Member] | Market Approach Valuation Technique [Member] | Private Label Residential Mortgage Backed Securities and Securitized Debt [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Non Binding Third-Party Valuation		70.70	[2]	73.58	[3]
Level 3 [Member] | Market Approach Valuation Technique [Member] | Collateralized Loan Obligations [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value		$ 51,520,000		$ 121,674,000	[1]
Level 3 [Member] | Market Approach Valuation Technique [Member] | Collateralized Loan Obligations [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Non Binding Third-Party Valuation		14.00		21.50	[1]
Level 3 [Member] | Market Approach Valuation Technique [Member] | Collateralized Loan Obligations [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Non Binding Third-Party Valuation		127.50		137.00	[1]
Level 3 [Member] | Market Approach Valuation Technique [Member] | Collateralized Loan Obligations [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Non Binding Third-Party Valuation		89.83		94.85	[1]
Level 3 [Member] | Market Approach Valuation Technique [Member] | Private Label Commercial Mortgage-Backed Securities [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value		$ 25,030,000		$ 40,919,000
Level 3 [Member] | Market Approach Valuation Technique [Member] | Private Label Commercial Mortgage-Backed Securities [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Non Binding Third-Party Valuation		6.16		5.62
Level 3 [Member] | Market Approach Valuation Technique [Member] | Private Label Commercial Mortgage-Backed Securities [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Non Binding Third-Party Valuation		98.50		103.25
Level 3 [Member] | Market Approach Valuation Technique [Member] | Private Label Commercial Mortgage-Backed Securities [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Non Binding Third-Party Valuation		44.95		66.56
Level 3 [Member] | Market Approach Valuation Technique [Member] | Agency Interest Only Residential Mortgage-Backed Securities [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value		$ 22,943,000		$ 22,928,000
Level 3 [Member] | Market Approach Valuation Technique [Member] | Agency Interest Only Residential Mortgage-Backed Securities [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Non Binding Third-Party Valuation		3.16		3.62
Level 3 [Member] | Market Approach Valuation Technique [Member] | Agency Interest Only Residential Mortgage-Backed Securities [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Non Binding Third-Party Valuation		23.81		24.86
Level 3 [Member] | Market Approach Valuation Technique [Member] | Agency Interest Only Residential Mortgage-Backed Securities [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Non Binding Third-Party Valuation		10.70		11.38
Level 3 [Member] | Income Approach Valuation Technique [Member] | Consumer loans and asset-backed securities backed by consumer loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value		$ 77,701,000		$ 22,950,000	[1]
Level 3 [Member] | Income Approach Valuation Technique [Member] | Consumer loans and asset-backed securities backed by consumer loans [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield		9.00%		0.00%	[1]
Level 3 [Member] | Income Approach Valuation Technique [Member] | Consumer loans and asset-backed securities backed by consumer loans [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield		15.30%		12.00%	[1]
Level 3 [Member] | Income Approach Valuation Technique [Member] | Consumer loans and asset-backed securities backed by consumer loans [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield		10.70%		9.10%	[1]
Level 3 [Member] | Income Approach Valuation Technique [Member] | Corporate debt, Non-exchange traded corporate equity, and warrants [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value				$ 45,668,000
Level 3 [Member] | Income Approach Valuation Technique [Member] | Corporate debt, Non-exchange traded corporate equity, and warrants [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Non Binding Third-Party Valuation				73.00
Yield				7.50%
Level 3 [Member] | Income Approach Valuation Technique [Member] | Corporate debt, Non-exchange traded corporate equity, and warrants [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Non Binding Third-Party Valuation				108.00
Yield				24.30%
Level 3 [Member] | Income Approach Valuation Technique [Member] | Corporate debt, Non-exchange traded corporate equity, and warrants [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Non Binding Third-Party Valuation				95.08
Yield				13.30%
Level 3 [Member] | Income Approach Valuation Technique [Member] | Corporate debt and warrants [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value		$ 10,500,000
Level 3 [Member] | Income Approach Valuation Technique [Member] | Corporate debt and warrants [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield		15.00%
Level 3 [Member] | Income Approach Valuation Technique [Member] | Corporate debt and warrants [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield		15.00%
Level 3 [Member] | Income Approach Valuation Technique [Member] | Corporate debt and warrants [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield		15.00%
Level 3 [Member] | Income Approach Valuation Technique [Member] | Collateralized Loan Obligations [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value		$ 5,283,000		$ 320,000	[1]
Level 3 [Member] | Income Approach Valuation Technique [Member] | Collateralized Loan Obligations [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield		12.00%		14.40%	[1]
Projected Collateral Prepayments		50.90%		62.70%	[1]
Fair Value Inputs Losses		2.40%		4.00%	[1]
Fair Value Inputs Projected Collateral Recoveries		1.40%		1.70%	[1]
Fair Value Inputs Projected Collateral Scheduled Amortization		25.00%		31.60%	[1]
Level 3 [Member] | Income Approach Valuation Technique [Member] | Collateralized Loan Obligations [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield		33.60%		14.40%	[1]
Projected Collateral Prepayments		70.10%		62.70%	[1]
Fair Value Inputs Losses		8.10%		4.00%	[1]
Fair Value Inputs Projected Collateral Recoveries		4.80%		1.70%	[1]
Fair Value Inputs Projected Collateral Scheduled Amortization		45.10%		31.60%	[1]
Level 3 [Member] | Income Approach Valuation Technique [Member] | Collateralized Loan Obligations [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield		17.60%		14.40%	[1]
Projected Collateral Prepayments		58.50%		62.70%	[1]
Fair Value Inputs Losses		4.30%		4.00%	[1]
Fair Value Inputs Projected Collateral Recoveries		2.90%		1.70%	[1]
Fair Value Inputs Projected Collateral Scheduled Amortization		34.30%		31.60%	[1]
Total Outstanding Collateral		100.00%		100.00%	[1]
Level 3 [Member] | Income Approach Valuation Technique [Member] | Private Label Residential Mortgage-Backed Securities [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value		$ 45,449,000		$ 72,222,000
Level 3 [Member] | Income Approach Valuation Technique [Member] | Private Label Residential Mortgage-Backed Securities [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield		4.00%		3.00%
Projected Collateral Prepayments		5.30%		6.70%
Fair Value Inputs Losses		1.10%		0.00%
Fair Value Inputs Projected Collateral Recoveries		1.40%		0.00%
Fair Value Inputs Projected Collateral Scheduled Amortization		0.00%		0.00%
Level 3 [Member] | Income Approach Valuation Technique [Member] | Private Label Residential Mortgage-Backed Securities [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield		56.20%		13.60%
Projected Collateral Prepayments		78.00%		100.00%
Fair Value Inputs Losses		31.20%		44.50%
Fair Value Inputs Projected Collateral Recoveries		19.00%		22.40%
Fair Value Inputs Projected Collateral Scheduled Amortization		70.70%		86.40%
Level 3 [Member] | Income Approach Valuation Technique [Member] | Private Label Residential Mortgage-Backed Securities [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield		13.40%		7.00%
Projected Collateral Prepayments		37.10%		45.60%
Fair Value Inputs Losses		13.50%		11.30%
Fair Value Inputs Projected Collateral Recoveries		8.10%		8.00%
Fair Value Inputs Projected Collateral Scheduled Amortization		41.30%		35.10%
Total Outstanding Collateral		100.00%		100.00%
Level 3 [Member] | Income Approach Valuation Technique [Member] | Private Label Commercial Mortgage-Backed Securities [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value		$ 17,485,000		$ 12,392,000
Level 3 [Member] | Income Approach Valuation Technique [Member] | Private Label Commercial Mortgage-Backed Securities [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield		12.10%		12.00%
Fair Value Inputs Losses		0.20%		0.10%
Fair Value Inputs Projected Collateral Recoveries		0.00%		0.90%
Fair Value Inputs Projected Collateral Scheduled Amortization		0.00%		85.30%
Level 3 [Member] | Income Approach Valuation Technique [Member] | Private Label Commercial Mortgage-Backed Securities [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield		38.00%		51.10%
Fair Value Inputs Losses		100.00%		2.50%
Fair Value Inputs Projected Collateral Recoveries		13.20%		13.50%
Fair Value Inputs Projected Collateral Scheduled Amortization		98.40%		99.00%
Level 3 [Member] | Income Approach Valuation Technique [Member] | Private Label Commercial Mortgage-Backed Securities [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield		23.60%		23.70%
Fair Value Inputs Losses		16.50%		0.70%
Fair Value Inputs Projected Collateral Recoveries		4.80%		6.20%
Fair Value Inputs Projected Collateral Scheduled Amortization		78.70%		93.10%
Total Outstanding Collateral		100.00%		100.00%
Level 3 [Member] | Income Approach Valuation Technique [Member] | Performing Commercial Mortgage Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value		$ 48,342,000		$ 21,328,000
Level 3 [Member] | Income Approach Valuation Technique [Member] | Performing Commercial Mortgage Loans [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield		9.80%		9.20%
Level 3 [Member] | Income Approach Valuation Technique [Member] | Performing Commercial Mortgage Loans [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield		17.80%		13.10%
Level 3 [Member] | Income Approach Valuation Technique [Member] | Performing Commercial Mortgage Loans [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield		12.30%		10.30%
Level 3 [Member] | Income Approach Valuation Technique [Member] | Non-performing Commercial Mortgage Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value		$ 6,278,000		$ 6,981,000
Level 3 [Member] | Income Approach Valuation Technique [Member] | Non-performing Commercial Mortgage Loans [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield		10.20%		15.30%
Months to Resolution		11 months 6 days		15 days
Level 3 [Member] | Income Approach Valuation Technique [Member] | Non-performing Commercial Mortgage Loans [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield		10.20%		20.10%
Months to Resolution		11 months 6 days		10 months 15 days
Level 3 [Member] | Income Approach Valuation Technique [Member] | Non-performing Commercial Mortgage Loans [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield		10.20%		16.40%
Months to Resolution		11 months 6 days		8 months 6 days
Level 3 [Member] | Income Approach Valuation Technique [Member] | Agency Interest Only Residential Mortgage-Backed Securities [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value		$ 5,412,000		$ 8,457,000
Level 3 [Member] | Income Approach Valuation Technique [Member] | Agency Interest Only Residential Mortgage-Backed Securities [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Projected Collateral Prepayments		21.20%		50.20%
Fair Value Inputs Projected Collateral Scheduled Amortization		14.70%		0.00%
LIBOR OAS	[4]	0.12%		(1.54%)
Level 3 [Member] | Income Approach Valuation Technique [Member] | Agency Interest Only Residential Mortgage-Backed Securities [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Projected Collateral Prepayments		85.30%		100.00%
Fair Value Inputs Projected Collateral Scheduled Amortization		78.80%		49.80%
LIBOR OAS	[4]	14.69%		17.96%
Level 3 [Member] | Income Approach Valuation Technique [Member] | Agency Interest Only Residential Mortgage-Backed Securities [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Projected Collateral Prepayments		69.90%		75.50%
Fair Value Inputs Projected Collateral Scheduled Amortization		30.10%		24.50%
Total Outstanding Collateral		100.00%		100.00%
LIBOR OAS	[4]	4.19%		3.59%
Level 3 [Member] | Income Approach Valuation Technique [Member] | Residential Mortgage Loans and Real Estate Owned Properties [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value		$ 32,489,000		$ 36,117,000
Level 3 [Member] | Income Approach Valuation Technique [Member] | Residential Mortgage Loans and Real Estate Owned Properties [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield		5.70%		6.10%
Months to Resolution		4 months		4 months 3 days
Level 3 [Member] | Income Approach Valuation Technique [Member] | Residential Mortgage Loans and Real Estate Owned Properties [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield		12.00%		12.00%
Months to Resolution		116 months 21 days		79 months 3 days
Level 3 [Member] | Income Approach Valuation Technique [Member] | Residential Mortgage Loans and Real Estate Owned Properties [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield		8.00%		7.30%
Months to Resolution		32 months 15 days		24 months 18 days
Credit Default Swaps On Asset Backed Securities [Member] | Level 3 [Member] | Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value		$ 8,665,000		$ 11,148,000
Credit Default Swaps On Asset Backed Securities [Member] | Level 3 [Member] | Income Approach Valuation Technique [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Projected Collateral Prepayments		26.50%		17.80%
Fair Value Inputs Losses		17.20%		16.50%
Fair Value Inputs Projected Collateral Recoveries		7.00%		7.70%
Fair Value Inputs Projected Collateral Scheduled Amortization		24.80%		15.90%
Credit Default Swaps On Asset Backed Securities [Member] | Level 3 [Member] | Income Approach Valuation Technique [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Projected Collateral Prepayments		43.70%		55.80%
Fair Value Inputs Losses		35.00%		37.70%
Fair Value Inputs Projected Collateral Recoveries		17.80%		18.50%
Fair Value Inputs Projected Collateral Scheduled Amortization		32.60%		43.40%
Credit Default Swaps On Asset Backed Securities [Member] | Level 3 [Member] | Income Approach Valuation Technique [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Projected Collateral Prepayments		31.70%		32.50%
Fair Value Inputs Losses		27.00%		29.70%
Fair Value Inputs Projected Collateral Recoveries		12.80%		12.80%
Fair Value Inputs Projected Collateral Scheduled Amortization		28.50%		25.00%
Total Outstanding Collateral		100.00%		100.00%
Total Return Swaps [Member] | Level 3 [Member] | Market Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Financial and Nonfinancial Liabilities, Fair Value Disclosure		$ (2,879,000)
Total Return Swaps [Member] | Level 3 [Member] | Market Approach Valuation Technique [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Non Binding Third-Party Valuation	[5]	47.78
Total Return Swaps [Member] | Level 3 [Member] | Market Approach Valuation Technique [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Non Binding Third-Party Valuation	[5]	100.50
Total Return Swaps [Member] | Level 3 [Member] | Market Approach Valuation Technique [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Non Binding Third-Party Valuation	[5]	59.03
Guarantees [Member] | Level 3 [Member] | Recent Transactions [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Financial and Nonfinancial Liabilities, Fair Value Disclosure		$ (1,229,000)
Private Corporate Equity Investments [Member] | Non-Exchange Traded Preferred Equity Investment in Commercial Mortgage-related Private Partnership | Level 3 [Member] | Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value				$ 6,241,000
Private Corporate Equity Investments [Member] | Non-Exchange Traded Preferred Equity Investment in Commercial Mortgage-related Private Partnership | Level 3 [Member] | Income Approach Valuation Technique [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield				10.00%
Expected Holding Period (Months)				17 months
Private Corporate Equity Investments [Member] | Non-Exchange Traded Preferred Equity Investment in Commercial Mortgage-related Private Partnership | Level 3 [Member] | Income Approach Valuation Technique [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield				10.00%
Expected Holding Period (Months)				17 months
Private Corporate Equity Investments [Member] | Non-Exchange Traded Preferred Equity Investment in Commercial Mortgage-related Private Partnership | Level 3 [Member] | Income Approach Valuation Technique [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield				10.00%
Expected Holding Period (Months)				17 months
Private Corporate Equity Investments [Member] | Non-exchange traded equity investments in commercial mortgage-related private partnerships [Member] | Level 3 [Member] | Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value		$ 10,817,000
Private Corporate Equity Investments [Member] | Non-exchange traded equity investments in commercial mortgage-related private partnerships [Member] | Level 3 [Member] | Income Approach Valuation Technique [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield		16.50%
Expected Holding Period (Months)		8 months 21 days
Private Corporate Equity Investments [Member] | Non-exchange traded equity investments in commercial mortgage-related private partnerships [Member] | Level 3 [Member] | Income Approach Valuation Technique [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield		12.30%
Expected Holding Period (Months)		17 months 3 days
Private Corporate Equity Investments [Member] | Non-exchange traded equity investments in commercial mortgage-related private partnerships [Member] | Level 3 [Member] | Income Approach Valuation Technique [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield		13.40%
Expected Holding Period (Months)		10 months 27 days
Private Corporate Equity Investments [Member] | Non-Exchange Traded Preferred and Common Equity Investment in Mortgage-Related Entities [Member] | Level 3 [Member] | Recent Transactions [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value		$ 5,238,000		$ 5,411,000

[1] Conformed to current period presentation.

[2] Includes securitized debt with a fair value of $0.5 million as of September 30, 2015.

[3] Includes securitized debt with a fair value of $0.8 million as of December 31, 2014.

[4] Shown in basis points.

[5] Represents valuations on underlying assets.