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Investment Securities (Details) - Unrealized gains on investment securities - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
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Investment securities available-for-sale |  |
Investment Securities Available-for-Sale, Amortized Cost | $ 194,619 | $ 281,461
Investment Securities Available-for-Sale, Gross Unrealized Gains | 2,271 | 8,596
Investment Securities Available-for-Sale, Gross Unrealized Losses | (1,120) | (525)
Investment Securities Available-for-Sale, Fair Value | 195,770 | 289,532
Investment securities held-to-maturity |  |
Investment Securities Held-to-Maturity, Amortized Cost | 224,056 | 224,682
Investment Securities Held-to-Maturity, Gross Unrealized Gains | 6,793 | 6,858
Investment Securities Held-to-Maturity, Gross Unrealized Losses | (291) | (95)
Investment Securities Held-to-Maturity, Fair Value | 230,558 | 231,445
US Treasury Securities [Member] |  |
Investment securities held-to-maturity |  |
Investment Securities Held-to-Maturity, Amortized Cost | 28,471 | 28,264
Investment Securities Held-to-Maturity, Gross Unrealized Gains | $ 755 | $ 920
Investment Securities Held-to-Maturity, Gross Unrealized Losses |  |
Investment Securities Held-to-Maturity, Fair Value | $ 29,226 | $ 29,184
Federal Agency Obligations [Member] |  |
Investment securities available-for-sale |  |
Investment Securities Available-for-Sale, Amortized Cost | 29,062 | 32,650
Investment Securities Available-for-Sale, Gross Unrealized Gains | 142 | 217
Investment Securities Available-for-Sale, Gross Unrealized Losses | (58) | (50)
Investment Securities Available-for-Sale, Fair Value | 29,146 | 32,817
Investment securities held-to-maturity |  |
Investment Securities Held-to-Maturity, Amortized Cost | 33,616 | 27,103
Investment Securities Held-to-Maturity, Gross Unrealized Gains | 280 | 322
Investment Securities Held-to-Maturity, Gross Unrealized Losses | (119) | (28)
Investment Securities Held-to-Maturity, Fair Value | 33,777 | 27,397
Residential Mortgage Backed Securities [Member] |  |
Investment securities available-for-sale |  |
Investment Securities Available-for-Sale, Amortized Cost | 44,155 | 58,836
Investment Securities Available-for-Sale, Gross Unrealized Gains | 803 | 1,531
Investment Securities Available-for-Sale, Gross Unrealized Losses | (48) | (11)
Investment Securities Available-for-Sale, Fair Value | 44,910 | 60,356
Investment securities held-to-maturity |  |
Investment Securities Held-to-Maturity, Amortized Cost | 3,805 | 5,955
Investment Securities Held-to-Maturity, Gross Unrealized Gains | 11 | 28
Investment Securities Held-to-Maturity, Gross Unrealized Losses | (6) |
Investment Securities Held-to-Maturity, Fair Value | 3,810 | 5,983
Commercial Mortgage Backed Securities [Member] |  |
Investment securities available-for-sale |  |
Investment Securities Available-for-Sale, Amortized Cost | $ 2,981 | 3,042
Investment Securities Available-for-Sale, Gross Unrealized Gains |  | 4
Investment Securities Available-for-Sale, Gross Unrealized Losses | $ (9) |
Investment Securities Available-for-Sale, Fair Value | 2,972 | 3,046
Investment securities held-to-maturity |  |
Investment Securities Held-to-Maturity, Amortized Cost | 4,110 | 4,266
Investment Securities Held-to-Maturity, Gross Unrealized Gains | 27 | 50
Investment Securities Held-to-Maturity, Gross Unrealized Losses | (2) |
Investment Securities Held-to-Maturity, Fair Value | 4,135 | 4,316
US States and Political Subdivisions Debt Securities [Member] |  |
Investment securities available-for-sale |  |
Investment Securities Available-for-Sale, Amortized Cost | 8,188 | 8,201
Investment Securities Available-for-Sale, Gross Unrealized Gains | $ 169 | 205
Investment Securities Available-for-Sale, Gross Unrealized Losses |  |
Investment Securities Available-for-Sale, Fair Value | $ 8,357 | 8,406
Investment securities held-to-maturity |  |
Investment Securities Held-to-Maturity, Amortized Cost | 118,015 | 120,144
Investment Securities Held-to-Maturity, Gross Unrealized Gains | 5,001 | 4,512
Investment Securities Held-to-Maturity, Gross Unrealized Losses | (3) | (60)
Investment Securities Held-to-Maturity, Fair Value | 123,013 | 124,596
Corporate Bonds And Notes [Member] |  |
Investment securities available-for-sale |  |
Investment Securities Available-for-Sale, Amortized Cost | 53,566 | 119,838
Investment Securities Available-for-Sale, Gross Unrealized Gains | 702 | 5,950
Investment Securities Available-for-Sale, Gross Unrealized Losses | (292) | (11)
Investment Securities Available-for-Sale, Fair Value | 53,976 | 125,777
Investment securities held-to-maturity |  |
Investment Securities Held-to-Maturity, Amortized Cost | 36,039 | 38,950
Investment Securities Held-to-Maturity, Gross Unrealized Gains | 719 | 1,026
Investment Securities Held-to-Maturity, Gross Unrealized Losses | (161) | (7)
Investment Securities Held-to-Maturity, Fair Value | 36,597 | 39,969
Trust Preferred Securities [Member] |  |
Investment securities available-for-sale |  |
Investment Securities Available-for-Sale, Amortized Cost | 16,088 | 16,086
Investment Securities Available-for-Sale, Gross Unrealized Gains | 398 | 489
Investment Securities Available-for-Sale, Gross Unrealized Losses | (231) | (269)
Investment Securities Available-for-Sale, Fair Value | 16,255 | 16,306
Asset-backed Securities [Member] |  |
Investment securities available-for-sale |  |
Investment Securities Available-for-Sale, Amortized Cost | 20,005 | 27,393
Investment Securities Available-for-Sale, Gross Unrealized Gains | 18 | 140
Investment Securities Available-for-Sale, Gross Unrealized Losses | (298) | (31)
Investment Securities Available-for-Sale, Fair Value | 19,725 | 27,502
Certificates of Deposit [Member] |  |
Investment securities available-for-sale |  |
Investment Securities Available-for-Sale, Amortized Cost | 1,895 | 2,098
Investment Securities Available-for-Sale, Gross Unrealized Gains | 18 | 27
Investment Securities Available-for-Sale, Gross Unrealized Losses | (8) | (2)
Investment Securities Available-for-Sale, Fair Value | 1,905 | 2,123
Equity Securities [Member] |  |
Investment securities available-for-sale |  |
Investment Securities Available-for-Sale, Amortized Cost | 376 | 376
Investment Securities Available-for-Sale, Gross Unrealized Gains | 21 |
Investment Securities Available-for-Sale, Gross Unrealized Losses | (23) | (69)
Investment Securities Available-for-Sale, Fair Value | 374 | 307
Other Securities [Member] |  |
Investment securities available-for-sale |  |
Investment Securities Available-for-Sale, Amortized Cost | $ 18,303 | 12,941
Investment Securities Available-for-Sale, Gross Unrealized Gains |  | 33
Investment Securities Available-for-Sale, Gross Unrealized Losses | $ (153) | (82)
Investment Securities Available-for-Sale, Fair Value | $ 18,150 | $ 12,892

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