Available-for-Sale and Other Securities (Details 3) (USD $) In Thousands	Sep. 30, 2011		Dec. 31, 2010
Schedule of Credit Rating by Investment Security Type [Line Items]
Amortized Cost	$ 378,354		$ 435,835
Fair Value	231,919		284,608
Alt-A Mortgage-backed [Member]
Schedule of Credit Rating by Investment Security Type [Line Items]
Amortized Cost	59,534
Fair Value	51,578
Alt-A Mortgage-backed [Member] | AAA [Member]
Schedule of Credit Rating by Investment Security Type [Line Items]
Fair Value	0	[1]
Alt-A Mortgage-backed [Member] | AA +/- [Member]
Schedule of Credit Rating by Investment Security Type [Line Items]
Fair Value	24,446	[1]
Alt-A Mortgage-backed [Member] | A +/- [Member]
Schedule of Credit Rating by Investment Security Type [Line Items]
Fair Value	9,310	[1]
Alt-A Mortgage-backed [Member] | BBB +/- [Member]
Schedule of Credit Rating by Investment Security Type [Line Items]
Fair Value	0	[1]
Alt-A Mortgage-backed [Member] | Less Than BBB- [Member]
Schedule of Credit Rating by Investment Security Type [Line Items]
Fair Value	17,822	[1]
Pooled Trust Preferred [Member]
Schedule of Credit Rating by Investment Security Type [Line Items]
Amortized Cost	228,411
Fair Value	101,441
Pooled Trust Preferred [Member] | AAA [Member]
Schedule of Credit Rating by Investment Security Type [Line Items]
Fair Value	0	[1]
Pooled Trust Preferred [Member] | AA +/- [Member]
Schedule of Credit Rating by Investment Security Type [Line Items]
Fair Value	0	[1]
Pooled Trust Preferred [Member] | A +/- [Member]
Schedule of Credit Rating by Investment Security Type [Line Items]
Fair Value	25,373	[1]
Pooled Trust Preferred [Member] | BBB +/- [Member]
Schedule of Credit Rating by Investment Security Type [Line Items]
Fair Value	0	[1]
Pooled Trust Preferred [Member] | Less Than BBB- [Member]
Schedule of Credit Rating by Investment Security Type [Line Items]
Fair Value	76,068	[1]
Private label CMO [Member]
Schedule of Credit Rating by Investment Security Type [Line Items]
Amortized Cost	90,409
Fair Value	78,900
Private label CMO [Member] | AAA [Member]
Schedule of Credit Rating by Investment Security Type [Line Items]
Fair Value	1,698	[1]
Private label CMO [Member] | AA +/- [Member]
Schedule of Credit Rating by Investment Security Type [Line Items]
Fair Value	0	[1]
Private label CMO [Member] | A +/- [Member]
Schedule of Credit Rating by Investment Security Type [Line Items]
Fair Value	24,068	[1]
Private label CMO [Member] | BBB +/- [Member]
Schedule of Credit Rating by Investment Security Type [Line Items]
Fair Value	7,758	[1]
Private label CMO [Member] | Less Than BBB- [Member]
Schedule of Credit Rating by Investment Security Type [Line Items]
Fair Value	45,376	[1]
AAA [Member]
Schedule of Credit Rating by Investment Security Type [Line Items]
Fair Value	1,698	[1]	41,238	[1]
AA +/- [Member]
Schedule of Credit Rating by Investment Security Type [Line Items]
Fair Value	24,446	[1]	33,880	[1]
A +/- [Member]
Schedule of Credit Rating by Investment Security Type [Line Items]
Fair Value	58,751	[1]	29,691	[1]
BBB +/- [Member]
Schedule of Credit Rating by Investment Security Type [Line Items]
Fair Value	7,758	[1]	15,145	[1]
Less Than BBB- [Member]
Schedule of Credit Rating by Investment Security Type [Line Items]
Fair Value	$ 139,266	[1]	$ 164,654	[1]

[1]  Credit ratings reflect the lowest current rating assigned by a nationally recognized credit rating agency.