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Securities Available-For-Sale (Details) - Unrealized gains on investment securities - USD ($) $ in Thousands | Mar. 31, 2017 | Dec. 31, 2016
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Securities available-for-sale |  |
Securities available-for-sale, Amortized Cost | $ 352,021 | $ 351,928
Securities available-for-sale, Gross Unrealized Gains | 3,502 | 4,645
Securities available-for-sale, Gross Unrealized Losses | (3,047) | (3,283)
Securities available-for-sale, Fair Value | 352,476 | 353,290
Federal Agency Obligations [Member] |  |
Securities available-for-sale |  |
Securities available-for-sale, Amortized Cost | 56,670 | 52,826
Securities available-for-sale, Gross Unrealized Gains | 257 | 282
Securities available-for-sale, Gross Unrealized Losses | (277) | (271)
Securities available-for-sale, Fair Value | 56,650 | 52,837
Residential mortgage pass-through securities [Member] |  |
Securities available-for-sale |  |
Securities available-for-sale, Amortized Cost | 104,850 | 72,922
Securities available-for-sale, Gross Unrealized Gains | 602 | 519
Securities available-for-sale, Gross Unrealized Losses | (981) | (944)
Securities available-for-sale, Fair Value | 104,471 | 72,497
Commercial mortgage pass-through securities [Member] |  |
Securities available-for-sale |  |
Securities available-for-sale, Amortized Cost | 4,153 | 4,186
Securities available-for-sale, Gross Unrealized Gains | 32 | 23
Securities available-for-sale, Gross Unrealized Losses |  |
Securities available-for-sale, Fair Value | 4,185 | 4,209
Obligations of U.S. states and political subdivisions [Member] |  |
Securities available-for-sale |  |
Securities available-for-sale, Amortized Cost | 123,913 | 148,747
Securities available-for-sale, Gross Unrealized Gains | 2,008 | 2,789
Securities available-for-sale, Gross Unrealized Losses | (915) | (931)
Securities available-for-sale, Fair Value | 125,006 | 150,605
Trust Preferred Securities [Member] |  |
Securities available-for-sale |  |
Securities available-for-sale, Amortized Cost | 4,576 | 5,575
Securities available-for-sale, Gross Unrealized Gains | 97 | 242
Securities available-for-sale, Gross Unrealized Losses | (131) | (151)
Securities available-for-sale, Fair Value | 4,542 | 5,666
Corporate Bonds And Notes [Member] |  |
Securities available-for-sale |  |
Securities available-for-sale, Amortized Cost | 30,602 | 36,717
Securities available-for-sale, Gross Unrealized Gains | 242 | 586
Securities available-for-sale, Gross Unrealized Losses | (297) | (375)
Securities available-for-sale, Fair Value | 30,547 | 36,928
Asset-backed Securities [Member] |  |
Securities available-for-sale |  |
Securities available-for-sale, Amortized Cost | 14,058 | 14,867
Securities available-for-sale, Gross Unrealized Gains | 23 | 2
Securities available-for-sale, Gross Unrealized Losses | (112) | (286)
Securities available-for-sale, Fair Value | 13,969 | 14,583
Certificates of Deposit [Member] |  |
Securities available-for-sale |  |
Securities available-for-sale, Amortized Cost | 972 | 973
Securities available-for-sale, Gross Unrealized Gains | 9 | 10
Securities available-for-sale, Gross Unrealized Losses |  |
Securities available-for-sale, Fair Value | 981 | 983
Equity Securities [Member] |  |
Securities available-for-sale |  |
Securities available-for-sale, Amortized Cost | 376 | 376
Securities available-for-sale, Gross Unrealized Gains | 232 | 192
Securities available-for-sale, Gross Unrealized Losses |  |
Securities available-for-sale, Fair Value | 608 | 568
Other Securities [Member] |  |
Securities available-for-sale |  |
Securities available-for-sale, Amortized Cost | 11,851 | 14,739
Securities available-for-sale, Gross Unrealized Gains |  |
Securities available-for-sale, Gross Unrealized Losses | (334) | (325)
Securities available-for-sale, Fair Value | $ 11,517 | $ 14,414

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