Investment Securities (Schedule of Preferred Security and Associated Ratings) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended		12 Months Ended
	Sep. 30, 2013		Dec. 31, 2012
Schedule of Investments [Line Items]
Available-for-sale Securities, Amortized Cost Basis	$ 410,805		$ 482,440
Available-for-sale Securities, Gross Unrealized Gain (Loss)	8,236		16,316
Available-for-sale Securities, Fair Value	413,147		496,815
Trust Preferred Security [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Amortized Cost Basis	20,635
Available-for-sale Securities, Gross Unrealized Gain (Loss)	(1,098)
Available-for-sale Securities, Fair Value	19,537
Countrywide Capital IV [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Amortized Cost Basis	1,771
Available-for-sale Securities, Gross Unrealized Gain (Loss)	(2)
Available-for-sale Securities, Fair Value	1,769
Number Of Banks Currently Performing	1
Countrywide Capital IV [Member] | Standard & Poor's, BB+ Rating [Member]
Schedule of Investments [Line Items]
Debt Instrument, Credit Rating	BB+
Countrywide Capital V [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Amortized Cost Basis	2,747
Available-for-sale Securities, Gross Unrealized Gain (Loss)	28
Available-for-sale Securities, Fair Value	2,775
Number Of Banks Currently Performing	1
Countrywide Capital V [Member] | Standard & Poor's, BB+ Rating [Member]
Schedule of Investments [Line Items]
Debt Instrument, Credit Rating	BB+
Countrywide Capital V [Member] | Additional Deal Value [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Amortized Cost Basis	250
Available-for-sale Securities, Gross Unrealized Gain (Loss)	3
Available-for-sale Securities, Fair Value	253
Number Of Banks Currently Performing	1
Countrywide Capital V [Member] | Additional Deal Value [Member] | Standard & Poor's, BB+ Rating [Member]
Schedule of Investments [Line Items]
Debt Instrument, Credit Rating	BB+
Citigroup Cap IX [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Amortized Cost Basis	992
Available-for-sale Securities, Gross Unrealized Gain (Loss)	10
Available-for-sale Securities, Fair Value	1,002
Number Of Banks Currently Performing	1
Citigroup Cap IX [Member] | Standard & Poor's, BB Rating [Member]
Schedule of Investments [Line Items]
Debt Instrument, Credit Rating	BB
Citigroup Cap IX [Member] | Additional Deal Value [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Amortized Cost Basis	1,906
Available-for-sale Securities, Gross Unrealized Gain (Loss)	28
Available-for-sale Securities, Fair Value	1,934
Number Of Banks Currently Performing	1
Citigroup Cap IX [Member] | Additional Deal Value [Member] | Standard & Poor's, BB Rating [Member]
Schedule of Investments [Line Items]
Debt Instrument, Credit Rating	BB
Citigroup Cap XI [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Amortized Cost Basis	246
Available-for-sale Securities, Gross Unrealized Gain (Loss)	2
Available-for-sale Securities, Fair Value	248
Number Of Banks Currently Performing	1
Citigroup Cap XI [Member] | Standard & Poor's, BB Rating [Member]
Schedule of Investments [Line Items]
Debt Instrument, Credit Rating	BB
Nationsbank Cap Trust III [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Amortized Cost Basis	1,573
Available-for-sale Securities, Gross Unrealized Gain (Loss)	(297)
Available-for-sale Securities, Fair Value	1,276
Number Of Banks Currently Performing	1
Nationsbank Cap Trust III [Member] | Standard & Poor's, BB+ Rating [Member]
Schedule of Investments [Line Items]
Debt Instrument, Credit Rating	BB+
Morgan Stanley Cap Trust IV [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Amortized Cost Basis	2,500
Available-for-sale Securities, Gross Unrealized Gain (Loss)	(54)
Available-for-sale Securities, Fair Value	2,446
Number Of Banks Currently Performing	1
Morgan Stanley Cap Trust IV [Member] | Standard & Poor's, BB+ Rating [Member]
Schedule of Investments [Line Items]
Debt Instrument, Credit Rating	BB+
Morgan Stanley Cap Trust IV [Member] | Additional Deal Value [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Amortized Cost Basis	1,742
Available-for-sale Securities, Gross Unrealized Gain (Loss)	(32)
Available-for-sale Securities, Fair Value	1,710
Number Of Banks Currently Performing	1
Morgan Stanley Cap Trust IV [Member] | Additional Deal Value [Member] | Standard & Poor's, BB+ Rating [Member]
Schedule of Investments [Line Items]
Debt Instrument, Credit Rating	BB+
Saturns - GS 2004-04 [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Amortized Cost Basis	535
Available-for-sale Securities, Gross Unrealized Gain (Loss)	(26)
Available-for-sale Securities, Fair Value	509
Number Of Banks Currently Performing	1
Saturns - GS 2004-04 [Member] | Standard & Poor's, BB+ Rating [Member]
Schedule of Investments [Line Items]
Debt Instrument, Credit Rating	BB+
Goldman Sachs [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Amortized Cost Basis	1,000
Available-for-sale Securities, Gross Unrealized Gain (Loss)	(33)
Available-for-sale Securities, Fair Value	967
Number Of Banks Currently Performing	1
Goldman Sachs [Member] | Standard & Poor's, BB+ Rating [Member]
Schedule of Investments [Line Items]
Debt Instrument, Credit Rating	BB+
Stifel Financial [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Amortized Cost Basis	4,500
Available-for-sale Securities, Gross Unrealized Gain (Loss)	54
Available-for-sale Securities, Fair Value	4,554
Debt Instrument, Credit Rating	BBB-
Number Of Banks Currently Performing	1
ALESCO Preferred Funding VII [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Amortized Cost Basis	873
Available-for-sale Securities, Gross Unrealized Gain (Loss)	(779)
Available-for-sale Securities, Fair Value	$ 94
Deferral And Defaults As A Percentage Of Collateral	34.90%
Expected Deferral Default As Percent Of Remaining Performing Collateral	33.50%
ALESCO Preferred Funding VII [Member] | Ca Rating [Member]
Schedule of Investments [Line Items]
Debt Instrument, Credit Rating	Ca
ALESCO Preferred Funding VII [Member] | Maximum [Member]
Schedule of Investments [Line Items]
Number Of Banks Currently Performing	61	[1]
ALESCO Preferred Funding VII [Member] | Minimum [Member]
Schedule of Investments [Line Items]
Number Of Banks Currently Performing	47	[1]

[1] Includes banks and insurance companies.