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Securities Available-For-Sale (Details) - Unrealized gains on investment securities - USD ($) $ in Thousands | Jun. 30, 2017 | Dec. 31, 2016
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Securities available-for-sale |  |
Securities available-for-sale, Amortized Cost | $ 401,447 | $ 351,928
Securities available-for-sale, Gross Unrealized Gains | 3,931 | 4,645
Securities available-for-sale, Gross Unrealized Losses | (3,248) | (3,283)
Securities available-for-sale, Fair Value | 402,130 | 353,290
Federal Agency Obligations [Member] |  |
Securities available-for-sale |  |
Securities available-for-sale, Amortized Cost | 59,509 | 52,826
Securities available-for-sale, Gross Unrealized Gains | 317 | 282
Securities available-for-sale, Gross Unrealized Losses | (181) | (271)
Securities available-for-sale, Fair Value | 59,645 | 52,837
Residential mortgage pass-through securities [Member] |  |
Securities available-for-sale |  |
Securities available-for-sale, Amortized Cost | 140,963 | 72,922
Securities available-for-sale, Gross Unrealized Gains | 635 | 519
Securities available-for-sale, Gross Unrealized Losses | (1,198) | (944)
Securities available-for-sale, Fair Value | 140,400 | 72,497
Commercial mortgage pass-through securities [Member] |  |
Securities available-for-sale |  |
Securities available-for-sale, Amortized Cost | 4,120 | 4,186
Securities available-for-sale, Gross Unrealized Gains | 53 | 23
Securities available-for-sale, Gross Unrealized Losses |  |
Securities available-for-sale, Fair Value | 4,173 | 4,209
Obligations of U.S. states and political subdivisions [Member] |  |
Securities available-for-sale |  |
Securities available-for-sale, Amortized Cost | 135,181 | 148,747
Securities available-for-sale, Gross Unrealized Gains | 2,309 | 2,789
Securities available-for-sale, Gross Unrealized Losses | (1,136) | (931)
Securities available-for-sale, Fair Value | 136,354 | 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 | 83 | 242
Securities available-for-sale, Gross Unrealized Losses | (73) | (151)
Securities available-for-sale, Fair Value | 4,586 | 5,666
Corporate Bonds And Notes [Member] |  |
Securities available-for-sale |  |
Securities available-for-sale, Amortized Cost | 30,352 | 36,717
Securities available-for-sale, Gross Unrealized Gains | 252 | 586
Securities available-for-sale, Gross Unrealized Losses | (316) | (375)
Securities available-for-sale, Fair Value | 30,288 | 36,928
Asset-backed Securities [Member] |  |
Securities available-for-sale |  |
Securities available-for-sale, Amortized Cost | 13,293 | 14,867
Securities available-for-sale, Gross Unrealized Gains | 48 | 2
Securities available-for-sale, Gross Unrealized Losses | (60) | (286)
Securities available-for-sale, Fair Value | 13,281 | 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 | 7 | 10
Securities available-for-sale, Gross Unrealized Losses |  |
Securities available-for-sale, Fair Value | 629 | 983
Equity Securities [Member] |  |
Securities available-for-sale |  |
Securities available-for-sale, Amortized Cost | 377 | 376
Securities available-for-sale, Gross Unrealized Gains | 227 | 192
Securities available-for-sale, Gross Unrealized Losses |  |
Securities available-for-sale, Fair Value | 604 | 568
Other Securities [Member] |  |
Securities available-for-sale |  |
Securities available-for-sale, Amortized Cost | 12,454 | 14,739
Securities available-for-sale, Gross Unrealized Gains |  |
Securities available-for-sale, Gross Unrealized Losses | (284) | (325)
Securities available-for-sale, Fair Value | $ 12,170 | $ 14,414

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