Fair Value (Schedule Of Fair Value Of Predominantly Bank Trust Preferred CDOs) (Details) (USD $) In Thousands, unless otherwise specified	0 Months Ended
	Jun. 30, 2013
Financing Receivable, Recorded Investment [Line Items]
Fair value of predominantly bank trust preferred CDOs	$ 879,765
Percentage of total fair value by vintage	100.00%
AAA [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage of total fair value	62.70%
A [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage of total fair value	36.80%
BBB [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage of total fair value	0.50%
2001 [Member]
Financing Receivable, Recorded Investment [Line Items]
Fair value of predominantly bank trust preferred CDOs	38,859
Percentage of total fair value by vintage	4.50%
2001 [Member] | AAA [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage of total fair value	3.30%
2001 [Member] | A [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage of total fair value	1.10%
2001 [Member] | BBB [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage of total fair value	0.10%
2002 [Member]
Financing Receivable, Recorded Investment [Line Items]
Fair value of predominantly bank trust preferred CDOs	205,060
Percentage of total fair value by vintage	23.30%
2002 [Member] | AAA [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage of total fair value	20.40%
2002 [Member] | A [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage of total fair value	2.90%
2002 [Member] | BBB [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage of total fair value	0.00%
2003 [Member]
Financing Receivable, Recorded Investment [Line Items]
Fair value of predominantly bank trust preferred CDOs	324,921
Percentage of total fair value by vintage	36.90%
2003 [Member] | AAA [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage of total fair value	22.80%
2003 [Member] | A [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage of total fair value	14.10%
2003 [Member] | BBB [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage of total fair value	0.00%
2004 [Member]
Financing Receivable, Recorded Investment [Line Items]
Fair value of predominantly bank trust preferred CDOs	192,080
Percentage of total fair value by vintage	21.80%
2004 [Member] | AAA [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage of total fair value	7.90%
2004 [Member] | A [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage of total fair value	13.90%
2004 [Member] | BBB [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage of total fair value	0.00%
2005 [Member]
Financing Receivable, Recorded Investment [Line Items]
Fair value of predominantly bank trust preferred CDOs	17,453
Percentage of total fair value by vintage	2.00%
2005 [Member] | AAA [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage of total fair value	1.10%
2005 [Member] | A [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage of total fair value	0.90%
2005 [Member] | BBB [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage of total fair value	0.00%
2006 [Member]
Financing Receivable, Recorded Investment [Line Items]
Fair value of predominantly bank trust preferred CDOs	62,613
Percentage of total fair value by vintage	7.10%
2006 [Member] | AAA [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage of total fair value	2.80%
2006 [Member] | A [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage of total fair value	3.90%
2006 [Member] | BBB [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage of total fair value	0.40%
2007 [Member]
Financing Receivable, Recorded Investment [Line Items]
Fair value of predominantly bank trust preferred CDOs	$ 38,779
Percentage of total fair value by vintage	4.40%
2007 [Member] | AAA [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage of total fair value	4.40%
2007 [Member] | A [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage of total fair value	0.00%
2007 [Member] | BBB [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage of total fair value	0.00%