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Investment Securities (Details) - Unrealized gains on investment securities - USD ($) $ in Thousands | Jun. 30, 2016 | Dec. 31, 2015
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Investment securities available-for-sale |  |
Investment Securities Available-for-Sale, Amortized Cost | $ 205,144 | $ 194,619
Investment Securities Available-for-Sale, Gross Unrealized Gains | 4,084 | 2,271
Investment Securities Available-for-Sale, Gross Unrealized Losses | (962) | (1,120)
Investment Securities Available-for-Sale, Fair Value | 208,266 | 195,770
Investment securities held-to-maturity |  |
Investment Securities Held-to-Maturity, Amortized Cost | 214,718 | 224,056
Investment Securities Held-to-Maturity, Gross Unrealized Gains | 12,728 | 6,793
Investment Securities Held-to-Maturity, Gross Unrealized Losses | (19) | (291)
Investment Securities Held-to-Maturity, Fair Value | 227,427 | 230,558
Total, Amortized Cost | 419,862 | 418,675
Total, Gross Unrealized Gains | 16,812 | 9,064
Total, Gross Unrealized Losses | (981) | (1,411)
Total, Fair Value | 435,693 | 426,328
US Treasury Securities [Member] |  |
Investment securities held-to-maturity |  |
Investment Securities Held-to-Maturity, Amortized Cost | 28,574 | 28,471
Investment Securities Held-to-Maturity, Gross Unrealized Gains | 2,373 | 755
Investment Securities Held-to-Maturity, Gross Unrealized Losses |  |
Investment Securities Held-to-Maturity, Fair Value | 30,947 | 29,226
Federal Agency Obligations [Member] |  |
Investment securities available-for-sale |  |
Investment Securities Available-for-Sale, Amortized Cost | 29,785 | 29,062
Investment Securities Available-for-Sale, Gross Unrealized Gains | 628 | 142
Investment Securities Available-for-Sale, Gross Unrealized Losses | (10) | (58)
Investment Securities Available-for-Sale, Fair Value | 30,403 | 29,146
Investment securities held-to-maturity |  |
Investment Securities Held-to-Maturity, Amortized Cost | 29,459 | 33,616
Investment Securities Held-to-Maturity, Gross Unrealized Gains | 825 | 280
Investment Securities Held-to-Maturity, Gross Unrealized Losses |  | (119)
Investment Securities Held-to-Maturity, Fair Value | 30,284 | 33,777
Residential Mortgage Backed Securities [Member] |  |
Investment securities available-for-sale |  |
Investment Securities Available-for-Sale, Amortized Cost | 45,718 | 44,155
Investment Securities Available-for-Sale, Gross Unrealized Gains | 1,326 | 803
Investment Securities Available-for-Sale, Gross Unrealized Losses | (14) | (48)
Investment Securities Available-for-Sale, Fair Value | 47,030 | 44,910
Investment securities held-to-maturity |  |
Investment Securities Held-to-Maturity, Amortized Cost | 3,147 | 3,805
Investment Securities Held-to-Maturity, Gross Unrealized Gains | 30 | 11
Investment Securities Held-to-Maturity, Gross Unrealized Losses | (12) | (6)
Investment Securities Held-to-Maturity, Fair Value | 3,165 | 3,810
Commercial Mortgage Backed Securities [Member] |  |
Investment securities available-for-sale |  |
Investment Securities Available-for-Sale, Amortized Cost | 2,949 | 2,981
Investment Securities Available-for-Sale, Gross Unrealized Gains | 125 |
Investment Securities Available-for-Sale, Gross Unrealized Losses |  | (9)
Investment Securities Available-for-Sale, Fair Value | 3,074 | 2,972
Investment securities held-to-maturity |  |
Investment Securities Held-to-Maturity, Amortized Cost | 1,301 | 4,110
Investment Securities Held-to-Maturity, Gross Unrealized Gains | 44 | 27
Investment Securities Held-to-Maturity, Gross Unrealized Losses |  | (2)
Investment Securities Held-to-Maturity, Fair Value | 1,345 | 4,135
US States and Political Subdivisions Debt Securities [Member] |  |
Investment securities available-for-sale |  |
Investment Securities Available-for-Sale, Amortized Cost | 38,085 | 8,188
Investment Securities Available-for-Sale, Gross Unrealized Gains | 336 | 169
Investment Securities Available-for-Sale, Gross Unrealized Losses |  |
Investment Securities Available-for-Sale, Fair Value | 38,421 | 8,357
Investment securities held-to-maturity |  |
Investment Securities Held-to-Maturity, Amortized Cost | 115,154 | 118,015
Investment Securities Held-to-Maturity, Gross Unrealized Gains | 7,661 | 5,001
Investment Securities Held-to-Maturity, Gross Unrealized Losses |  | (3)
Investment Securities Held-to-Maturity, Fair Value | 122,815 | 123,013
Trust Preferred Securities [Member] |  |
Investment securities available-for-sale |  |
Investment Securities Available-for-Sale, Amortized Cost | 16,089 | 16,088
Investment Securities Available-for-Sale, Gross Unrealized Gains | 506 | 398
Investment Securities Available-for-Sale, Gross Unrealized Losses | (268) | (231)
Investment Securities Available-for-Sale, Fair Value | 16,327 | 16,255
Corporate Bonds And Notes [Member] |  |
Investment securities available-for-sale |  |
Investment Securities Available-for-Sale, Amortized Cost | 34,098 | 53,566
Investment Securities Available-for-Sale, Gross Unrealized Gains | 1,003 | 702
Investment Securities Available-for-Sale, Gross Unrealized Losses | (182) | (292)
Investment Securities Available-for-Sale, Fair Value | 34,919 | 53,976
Investment securities held-to-maturity |  |
Investment Securities Held-to-Maturity, Amortized Cost | 37,083 | 36,039
Investment Securities Held-to-Maturity, Gross Unrealized Gains | 1,795 | 719
Investment Securities Held-to-Maturity, Gross Unrealized Losses | (7) | (161)
Investment Securities Held-to-Maturity, Fair Value | 38,871 | 36,597
Asset-backed Securities [Member] |  |
Investment securities available-for-sale |  |
Investment Securities Available-for-Sale, Amortized Cost | 17,124 | 20,005
Investment Securities Available-for-Sale, Gross Unrealized Gains |  | 18
Investment Securities Available-for-Sale, Gross Unrealized Losses | (412) | (298)
Investment Securities Available-for-Sale, Fair Value | 16,712 | 19,725
Certificates of Deposit [Member] |  |
Investment securities available-for-sale |  |
Investment Securities Available-for-Sale, Amortized Cost | 1,196 | 1,895
Investment Securities Available-for-Sale, Gross Unrealized Gains | 21 | 18
Investment Securities Available-for-Sale, Gross Unrealized Losses |  | (8)
Investment Securities Available-for-Sale, Fair Value | 1,217 | 1,905
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 | 16 | 21
Investment Securities Available-for-Sale, Gross Unrealized Losses | (11) | (23)
Investment Securities Available-for-Sale, Fair Value | 381 | 374
Other Securities [Member] |  |
Investment securities available-for-sale |  |
Investment Securities Available-for-Sale, Amortized Cost | 19,724 | 18,303
Investment Securities Available-for-Sale, Gross Unrealized Gains | 123 |
Investment Securities Available-for-Sale, Gross Unrealized Losses | (65) | (153)
Investment Securities Available-for-Sale, Fair Value | $ 19,782 | $ 18,150

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