Fair Value (Schedule Of Key Model Inputs And Assumptions Used To Fair Value Certain Asset-Backed Securities) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012		Sep. 30, 2012
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Assets-backed securities, Fair value	$ 1,083,840	[1]	$ 1,083,840	[1]
Trust Preferred - Predominantly Banks [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Assets-backed securities, Fair value	811,713		811,713
Asset-backed securities, Loss severity	100.00%
Trust Preferred - Predominantly Insurance [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Assets-backed securities, Fair value	253,069		253,069
Asset-backed securities, Loss severity	100.00%
Asset-backed securities, Prepayment rate			4.50%
Trust Preferred - Individual Banks [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Assets-backed securities, Fair value	19,058		19,058
Trust Preferred Securities - Real Estate Investment Trusts [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Assets-backed securities, Fair value	15,407		15,407
Asset-backed securities, Prepayment rate			0.00%
Other (Including ABS CDOs) [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Assets-backed securities, Fair value	52,979	[2]	52,979	[2]
Minimum [Member] | Asset-Backed Securities [Member] | Trust Preferred Securities - Real Estate Investment Trusts [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Asset-backed securities, Loss severity			60.00%
Minimum [Member] | Asset-Backed Securities [Member] | Other (Including ABS CDOs) [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Asset-backed securities, Loss severity			57.00%
Maximum [Member] | Asset-Backed Securities [Member] | Trust Preferred Securities - Real Estate Investment Trusts [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Asset-backed securities, Loss severity			100.00%
Maximum [Member] | Asset-Backed Securities [Member] | Other (Including ABS CDOs) [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Asset-backed securities, Loss severity			100.00%
Trust Preferred Banks and Insurance [Member] | Available-for-sale Securities [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Assets-backed securities, Fair value	965,100	[1]	965,100	[1]
Trust Preferred Banks and Insurance [Member] | Held-to-maturity Securities [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Assets-backed securities, Fair value	118,700	[1]	118,700	[1]
Other including ABS CDOs [Member] [Member] | Available-for-sale Securities [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Assets-backed securities, Fair value	40,200	[1]	40,200	[1]
Other including ABS CDOs [Member] [Member] | Held-to-maturity Securities [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Assets-backed securities, Fair value	$ 12,800	[1]	$ 12,800	[1]
Constant Default Rate Year 1 [Member] | Minimum [Member] | Trust Preferred - Predominantly Banks [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Asset-backed securities, Constant default rate	0.30%	[3]
Constant Default Rate Year 1 [Member] | Minimum [Member] | Trust Preferred - Predominantly Insurance [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Asset-backed securities, Constant default rate	0.30%	[4]
Constant Default Rate Year 1 [Member] | Minimum [Member] | Trust Preferred Securities - Real Estate Investment Trusts [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Asset-backed securities, Constant default rate	5.10%	[5]
Constant Default Rate Year 1 [Member] | Maximum [Member] | Trust Preferred - Predominantly Banks [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Asset-backed securities, Constant default rate	8.53%	[3]
Constant Default Rate Year 1 [Member] | Maximum [Member] | Trust Preferred - Predominantly Insurance [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Asset-backed securities, Constant default rate	1.34%	[4]
Constant Default Rate Year 1 [Member] | Maximum [Member] | Trust Preferred Securities - Real Estate Investment Trusts [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Asset-backed securities, Constant default rate	8.40%	[5]
Constant Default Rate Year 2 to 3 [Member] | Minimum [Member] | Trust Preferred Securities - Real Estate Investment Trusts [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Asset-backed securities, Constant default rate	4.30%	[5]
Constant Default Rate Year 2 to 3 [Member] | Maximum [Member] | Trust Preferred Securities - Real Estate Investment Trusts [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Asset-backed securities, Constant default rate	6.20%	[5]
Constant Default Rate Year 2 to 5 [Member] | Minimum [Member] | Trust Preferred - Predominantly Banks [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Asset-backed securities, Constant default rate	0.47%	[3]
Constant Default Rate Year 2 to 5 [Member] | Minimum [Member] | Trust Preferred - Predominantly Insurance [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Asset-backed securities, Constant default rate	0.47%	[4]
Constant Default Rate Year 2 to 5 [Member] | Maximum [Member] | Trust Preferred - Predominantly Banks [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Asset-backed securities, Constant default rate	0.72%	[3]
Constant Default Rate Year 2 to 5 [Member] | Maximum [Member] | Trust Preferred - Predominantly Insurance [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Asset-backed securities, Constant default rate	0.48%	[4]
Constant Default Rate Year 4 to 6 [Member] | Trust Preferred Securities - Real Estate Investment Trusts [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Asset-backed securities, Constant default rate	1.00%	[5]
Constant Default Rate Year 6 to Maturity [Member] | Trust Preferred Securities - Real Estate Investment Trusts [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Asset-backed securities, Constant default rate	0.50%	[5]
Constant Default Rate Year 6 to Maturity [Member] | Minimum [Member] | Trust Preferred - Predominantly Banks [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Asset-backed securities, Constant default rate	0.58%	[3]
Constant Default Rate Year 6 to Maturity [Member] | Minimum [Member] | Trust Preferred - Predominantly Insurance [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Asset-backed securities, Constant default rate	0.50%	[4]
Constant Default Rate Year 6 to Maturity [Member] | Maximum [Member] | Trust Preferred - Predominantly Banks [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Asset-backed securities, Constant default rate	0.70%	[3]
Constant Default Rate Year 6 to Maturity [Member] | Maximum [Member] | Trust Preferred - Predominantly Insurance [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Asset-backed securities, Constant default rate	0.54%	[4]
Constant Default Rate Until 2016 [Member] | Minimum [Member] | Trust Preferred - Predominantly Banks [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Asset-backed securities, Prepayment rate	3.00%	[6]
Constant Default Rate Until 2016 [Member] | Maximum [Member] | Trust Preferred - Predominantly Banks [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Asset-backed securities, Prepayment rate	20.68%	[6]
Constant Default Rate 2016 to Maturity [Member] | Trust Preferred - Predominantly Banks [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Asset-backed securities, Prepayment rate	3.00%	[6]

[1] Includes $965.1 million of AFS securities and $118.7 million of HTM securities.

[2] Includes $40.2 million of AFS securities and $12.8 million of HTM securities.

[3] CDR ranges: yr 1 – 0.30% to 8.53%; yrs 2-5 – 0.47% to 0.72%; yrs 6 to maturity – 0.58% to 0.70%.

[4] CDR ranges: yr 1 – 0.30% to 1.34%; yrs 2-5 – 0.47% to 0.48%; yrs 6 to maturity – 0.50% to 0.54%.

[5] CDR ranges: yr 1 – 5.1% to 8.4%; yrs 2-3 – 4.3% to 6.2%; yrs 4-6 – 1.0%; yrs 6 to maturity – 0.50%.

[6] Constant Prepayment Rate (“CPR”) ranges: 3.0% to 20.68% annually until 2016; 2016 to maturity – 3.0% annually.