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Securities Available-For-Sale (Details) - Unrealized gains on investment securities - USD ($) $ in Thousands | Sep. 30, 2017 | Dec. 31, 2016
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Securities available-for-sale |  |
Securities available-for-sale, Amortized Cost | $ 399,418 | $ 351,928
Securities available-for-sale, Gross Unrealized Gains | 3,935 | 4,645
Securities available-for-sale, Gross Unrealized Losses | (2,837) | (3,283)
Securities available-for-sale, Fair Value | 400,516 | 353,290
Federal Agency Obligations [Member] |  |
Securities available-for-sale |  |
Securities available-for-sale, Amortized Cost | 55,819 | 52,826
Securities available-for-sale, Gross Unrealized Gains | 290 | 282
Securities available-for-sale, Gross Unrealized Losses | (171) | (271)
Securities available-for-sale, Fair Value | 55,938 | 52,837
Residential mortgage pass-through securities [Member] |  |
Securities available-for-sale |  |
Securities available-for-sale, Amortized Cost | 133,517 | 72,922
Securities available-for-sale, Gross Unrealized Gains | 668 | 519
Securities available-for-sale, Gross Unrealized Losses | (1,021) | (944)
Securities available-for-sale, Fair Value | 133,164 | 72,497
Commercial mortgage pass-through securities [Member] |  |
Securities available-for-sale |  |
Securities available-for-sale, Amortized Cost | 4,088 | 4,186
Securities available-for-sale, Gross Unrealized Gains | 42 | 23
Securities available-for-sale, Gross Unrealized Losses |  |
Securities available-for-sale, Fair Value | 4,130 | 4,209
Obligations of U.S. states and political subdivisions [Member] |  |
Securities available-for-sale |  |
Securities available-for-sale, Amortized Cost | 143,787 | 148,747
Securities available-for-sale, Gross Unrealized Gains | 2,233 | 2,789
Securities available-for-sale, Gross Unrealized Losses | (1,044) | (931)
Securities available-for-sale, Fair Value | 144,976 | 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 | 122 | 242
Securities available-for-sale, Gross Unrealized Losses | (71) | (151)
Securities available-for-sale, Fair Value | 4,627 | 5,666
Corporate Bonds And Notes [Member] |  |
Securities available-for-sale |  |
Securities available-for-sale, Amortized Cost | 30,052 | 36,717
Securities available-for-sale, Gross Unrealized Gains | 255 | 586
Securities available-for-sale, Gross Unrealized Losses | (219) | (375)
Securities available-for-sale, Fair Value | 30,088 | 36,928
Asset-backed Securities [Member] |  |
Securities available-for-sale |  |
Securities available-for-sale, Amortized Cost | 12,605 | 14,867
Securities available-for-sale, Gross Unrealized Gains | 66 | 2
Securities available-for-sale, Gross Unrealized Losses | (38) | (286)
Securities available-for-sale, Fair Value | 12,633 | 14,583
Certificates of Deposit [Member] |  |
Securities available-for-sale |  |
Securities available-for-sale, Amortized Cost | 622 | 973
Securities available-for-sale, Gross Unrealized Gains | 5 | 10
Securities available-for-sale, Gross Unrealized Losses |  |
Securities available-for-sale, Fair Value | 627 | 983
Equity Securities [Member] |  |
Securities available-for-sale |  |
Securities available-for-sale, Amortized Cost | 376 | 376
Securities available-for-sale, Gross Unrealized Gains | 254 | 192
Securities available-for-sale, Gross Unrealized Losses |  |
Securities available-for-sale, Fair Value | 630 | 568
Other Securities [Member] |  |
Securities available-for-sale |  |
Securities available-for-sale, Amortized Cost | 13,976 | 14,739
Securities available-for-sale, Gross Unrealized Gains |  |
Securities available-for-sale, Gross Unrealized Losses | (273) | (325)
Securities available-for-sale, Fair Value | $ 13,703 | $ 14,414

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