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Investment Securities (Schedule of Preferred Security and Associated Ratings) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2014 | Dec. 31, 2013
Schedule of Investments [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | $ 281,447 | $ 319,147
Available-for-sale Securities, Gross Unrealized Gain (Loss) | 7,727 | 6,960
Available-for-sale Securities, Fair Value | 287,471 | 323,070
Trust Preferred Security [Member] |  |
Schedule of Investments [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 19,764 |
Available-for-sale Securities, Gross Unrealized Gain (Loss) | 33 |
Available-for-sale Securities, Fair Value | 19,797 |
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) | 34 |
Available-for-sale Securities, Fair Value | 1,805 |
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) | 56 |
Available-for-sale Securities, Fair Value | 2,803 |
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) | 5 |
Available-for-sale Securities, Fair Value | 255 |
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) | 19 |
Available-for-sale Securities, Fair Value | 1,011 |
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 | 1,907 |
Available-for-sale Securities, Gross Unrealized Gain (Loss) | 45 |
Available-for-sale Securities, Fair Value | 1,952 |
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) | 5 |
Available-for-sale Securities, Fair Value | 251 |
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 | 1,574 |
Available-for-sale Securities, Gross Unrealized Gain (Loss) | (296) |
Available-for-sale Securities, Fair Value | 1,278 |
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) | 6 |
Available-for-sale Securities, Fair Value | 2,506 |
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) | 10 |
Available-for-sale Securities, Fair Value | 1,752 |
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) | 0 |
Available-for-sale Securities, Fair Value | 535 |
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) | 32 |
Available-for-sale Securities, Fair Value | 1,032 |
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) | 117 |
Available-for-sale Securities, Fair Value | $ 4,617 |
Number Of Banks Currently Performing | 1 |
Stifel Financial [Member] | Standard & Poor's, BB+ Rating [Member] |  |
Schedule of Investments [Line Items] |  |
Debt Instrument, Credit Rating | BBB- |

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