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Investment Securities (Unrealized Gains) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012
Schedule of Investments [Line Items] |  |
Investment Securities Available-for-Sale: Amortized cost | $ 319,147 | $ 482,440
Investment Securities Available-for-Sale: Unrealized Gains | 6,960 | 16,316
Investment Securities Available-for-Sale: Unrealized Losses | (3,037) | (1,941)
Investment Securities Available-for-Sale: Fair Value | 323,070 | 496,815
Investment Securities Held-to-Maturity: Amortized Cost | 215,286 | 58,064
Investment Securities Held-to-Maturity: Unrealized Gains | 1,516 | 4,372
Investment Securities Held-to-Maturity: Unrealized Losses | (5,844) | (5)
Investment Securities Held-to-Maturity: Fair Value | 210,958 | 62,431
Total investment securities, amortized cost | 534,433 | 540,504
Total investment securities, gross unrealized gains | 8,476 | 20,688
Total investment securities, gross unrealized losses | (8,881) | (1,946)
Total investment securities, fair value | 534,028 | 559,246
U.S. Treasury and agency securities [Member] |  |
Schedule of Investments [Line Items] |  |
Investment Securities Available-for-Sale: Amortized cost | 14,344 | 11,870
Investment Securities Available-for-Sale: Unrealized Gains | 0 | 62
Investment Securities Available-for-Sale: Unrealized Losses | (825) | (23)
Investment Securities Available-for-Sale: Fair Value | 13,519 | 11,909
Investment Securities Held-to-Maturity: Amortized Cost | 28,056 |
Investment Securities Held-to-Maturity: Unrealized Gains | 0 |
Investment Securities Held-to-Maturity: Unrealized Losses | (1,019) |
Investment Securities Held-to-Maturity: Fair Value | 27,037 |
Federal agency obligations [Member] |  |
Schedule of Investments [Line Items] |  |
Investment Securities Available-for-Sale: Amortized cost | 20,567 | 20,207
Investment Securities Available-for-Sale: Unrealized Gains | 29 | 333
Investment Securities Available-for-Sale: Unrealized Losses | (655) | (5)
Investment Securities Available-for-Sale: Fair Value | 19,941 | 20,535
Investment Securities Held-to-Maturity: Amortized Cost | 15,249 | 4,178
Investment Securities Held-to-Maturity: Unrealized Gains | 23 | 79
Investment Securities Held-to-Maturity: Unrealized Losses | (389) | 0
Investment Securities Held-to-Maturity: Fair Value | 14,883 | 4,257
Residential mortgage-backed securities [Member] |  |
Schedule of Investments [Line Items] |  |
Investment Securities Available-for-Sale: Amortized cost | 48,312 | 52,400
Investment Securities Available-for-Sale: Unrealized Gains | 791 | 1,385
Investment Securities Available-for-Sale: Unrealized Losses | (229) | (1)
Investment Securities Available-for-Sale: Fair Value | 48,874 | 53,784
Investment Securities Held-to-Maturity: Amortized Cost | 2,246 |
Investment Securities Held-to-Maturity: Unrealized Gains | 0 |
Investment Securities Held-to-Maturity: Unrealized Losses | (64) |
Investment Securities Held-to-Maturity: Fair Value | 2,182 |
Commercial mortgage-backed securities [Member] |  |
Schedule of Investments [Line Items] |  |
Investment Securities Available-for-Sale: Amortized cost | 7,145 | 9,725
Investment Securities Available-for-Sale: Unrealized Gains | 3 | 244
Investment Securities Available-for-Sale: Unrealized Losses | (157) | 0
Investment Securities Available-for-Sale: Fair Value | 6,991 | 9,969
Investment Securities Held-to-Maturity: Amortized Cost | 4,417 | 5,501
Investment Securities Held-to-Maturity: Unrealized Gains | 41 | 154
Investment Securities Held-to-Maturity: Unrealized Losses | (62) | (5)
Investment Securities Held-to-Maturity: Fair Value | 4,396 | 5,650
Obligations of U.S. states and political subdivisions [Member] |  |
Schedule of Investments [Line Items] |  |
Investment Securities Available-for-Sale: Amortized cost | 30,804 | 103,193
Investment Securities Available-for-Sale: Unrealized Gains | 711 | 4,653
Investment Securities Available-for-Sale: Unrealized Losses | (55) | (132)
Investment Securities Available-for-Sale: Fair Value | 31,460 | 107,714
Investment Securities Held-to-Maturity: Amortized Cost | 127,418 | 48,385
Investment Securities Held-to-Maturity: Unrealized Gains | 1,303 | 4,139
Investment Securities Held-to-Maturity: Unrealized Losses | (3,688) | 0
Investment Securities Held-to-Maturity: Fair Value | 125,033 | 52,524
Trust preferred securities [Member] |  |
Schedule of Investments [Line Items] |  |
Investment Securities Available-for-Sale: Amortized cost | 19,763 | 22,279
Investment Securities Available-for-Sale: Unrealized Gains | 150 | 144
Investment Securities Available-for-Sale: Unrealized Losses | (510) | (1,174)
Investment Securities Available-for-Sale: Fair Value | 19,403 | 21,249
Corporate bonds and notes [Member] |  |
Schedule of Investments [Line Items] |  |
Investment Securities Available-for-Sale: Amortized cost | 154,182 | 228,681
Investment Securities Available-for-Sale: Unrealized Gains | 4,930 | 9,095
Investment Securities Available-for-Sale: Unrealized Losses | (482) | (371)
Investment Securities Available-for-Sale: Fair Value | 158,630 | 237,405
Investment Securities Held-to-Maturity: Amortized Cost | 37,900 |
Investment Securities Held-to-Maturity: Unrealized Gains | 149 |
Investment Securities Held-to-Maturity: Unrealized Losses | (622) |
Investment Securities Held-to-Maturity: Fair Value | 37,427 |
Asset-backed securities [Member] |  |
Schedule of Investments [Line Items] |  |
Investment Securities Available-for-Sale: Amortized cost | 15,733 | 19,431
Investment Securities Available-for-Sale: Unrealized Gains | 246 | 311
Investment Securities Available-for-Sale: Unrealized Losses | 0 | 0
Investment Securities Available-for-Sale: Fair Value | 15,979 | 19,742
Collateralized mortgage obligations [Member] |  |
Schedule of Investments [Line Items] |  |
Investment Securities Available-for-Sale: Amortized cost |  | 2,120
Investment Securities Available-for-Sale: Unrealized Gains |  | 0
Investment Securities Available-for-Sale: Unrealized Losses |  | 0
Investment Securities Available-for-Sale: Fair Value |  | 2,120
Certificates of Deposit [Member] |  |
Schedule of Investments [Line Items] |  |
Investment Securities Available-for-Sale: Amortized cost | 2,250 | 2,854
Investment Securities Available-for-Sale: Unrealized Gains | 32 | 21
Investment Securities Available-for-Sale: Unrealized Losses | (20) | (10)
Investment Securities Available-for-Sale: Fair Value | 2,262 | 2,865
Equity securities [Member] |  |
Schedule of Investments [Line Items] |  |
Investment Securities Available-for-Sale: Amortized cost | 376 | 535
Investment Securities Available-for-Sale: Unrealized Gains | 0 | 0
Investment Securities Available-for-Sale: Unrealized Losses | (89) | (210)
Investment Securities Available-for-Sale: Fair Value | 287 | 325
Other securities [Member] |  |
Schedule of Investments [Line Items] |  |
Investment Securities Available-for-Sale: Amortized cost | 5,671 | 9,145
Investment Securities Available-for-Sale: Unrealized Gains | 68 | 68
Investment Securities Available-for-Sale: Unrealized Losses | (15) | (15)
Investment Securities Available-for-Sale: Fair Value | $ 5,724 | $ 9,198

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