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Investment Securities (Details) - Unrealized gains on investment securities - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
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Investment securities available-for-sale |  |
Investment Securities Available-for-Sale, Amortized Cost | $ 351,928 | $ 194,619
Investment Securities Available-for-Sale, Gross Unrealized Gains | 4,645 | 2,271
Investment Securities Available-for-Sale, Gross Unrealized Losses | (3,283) | (1,120)
Investment Securities Available-for-Sale, Fair Value | 353,290 | 195,770
Investment securities held-to-maturity |  |
Investment Securities Held-to-Maturity, Amortized Cost |  | 224,056
Investment Securities Held-to-Maturity, Gross Unrealized Gains |  | 6,793
Investment Securities Held-to-Maturity, Gross Unrealized Losses |  | (291)
Investment Securities Held-to-Maturity, Fair Value |  | 231,445
Federal Agency Obligations [Member] |  |
Investment securities available-for-sale |  |
Investment Securities Available-for-Sale, Amortized Cost | 52,826 | 29,062
Investment Securities Available-for-Sale, Gross Unrealized Gains | 282 | 142
Investment Securities Available-for-Sale, Gross Unrealized Losses | (271) | (58)
Investment Securities Available-for-Sale, Fair Value | 52,837 | 29,146
Investment securities held-to-maturity |  |
Investment Securities Held-to-Maturity, Amortized Cost |  | 33,616
Investment Securities Held-to-Maturity, Gross Unrealized Gains |  | 280
Investment Securities Held-to-Maturity, Gross Unrealized Losses |  | (119)
Investment Securities Held-to-Maturity, Fair Value |  | 33,777
Residential Mortgage Backed Securities [Member] |  |
Investment securities available-for-sale |  |
Investment Securities Available-for-Sale, Amortized Cost | 72,922 | 44,155
Investment Securities Available-for-Sale, Gross Unrealized Gains | 519 | 803
Investment Securities Available-for-Sale, Gross Unrealized Losses | (944) | (48)
Investment Securities Available-for-Sale, Fair Value | 72,497 | 44,910
Investment securities held-to-maturity |  |
Investment Securities Held-to-Maturity, Amortized Cost |  | 3,805
Investment Securities Held-to-Maturity, Gross Unrealized Gains |  | 11
Investment Securities Held-to-Maturity, Gross Unrealized Losses |  | (6)
Investment Securities Held-to-Maturity, Fair Value |  | 3,810
Commercial Mortgage Backed Securities [Member] |  |
Investment securities available-for-sale |  |
Investment Securities Available-for-Sale, Amortized Cost | 4,186 | 2,981
Investment Securities Available-for-Sale, Gross Unrealized Gains | 23 |
Investment Securities Available-for-Sale, Gross Unrealized Losses |  | (9)
Investment Securities Available-for-Sale, Fair Value | 4,209 | 2,972
Investment securities held-to-maturity |  |
Investment Securities Held-to-Maturity, Amortized Cost |  | 4,110
Investment Securities Held-to-Maturity, Gross Unrealized Gains |  | 27
Investment Securities Held-to-Maturity, Gross Unrealized Losses |  | (2)
Investment Securities Held-to-Maturity, Fair Value |  | 4,135
US States and Political Subdivisions Debt Securities [Member] |  |
Investment securities available-for-sale |  |
Investment Securities Available-for-Sale, Amortized Cost | 148,747 | 8,188
Investment Securities Available-for-Sale, Gross Unrealized Gains | 2,789 | 169
Investment Securities Available-for-Sale, Gross Unrealized Losses | (931) |
Investment Securities Available-for-Sale, Fair Value | 150,605 | 8,357
Investment securities held-to-maturity |  |
Investment Securities Held-to-Maturity, Amortized Cost |  | 118,015
Investment Securities Held-to-Maturity, Gross Unrealized Gains |  | 5,001
Investment Securities Held-to-Maturity, Gross Unrealized Losses |  | (3)
Investment Securities Held-to-Maturity, Fair Value |  | 123,013
Trust Preferred Securities [Member] |  |
Investment securities available-for-sale |  |
Investment Securities Available-for-Sale, Amortized Cost | 5,575 | 16,088
Investment Securities Available-for-Sale, Gross Unrealized Gains | 242 | 398
Investment Securities Available-for-Sale, Gross Unrealized Losses | (151) | (231)
Investment Securities Available-for-Sale, Fair Value | 5,666 | 16,255
Corporate Bonds And Notes [Member] |  |
Investment securities available-for-sale |  |
Investment Securities Available-for-Sale, Amortized Cost | 36,717 | 53,566
Investment Securities Available-for-Sale, Gross Unrealized Gains | 586 | 702
Investment Securities Available-for-Sale, Gross Unrealized Losses | (375) | (292)
Investment Securities Available-for-Sale, Fair Value | 36,928 | 53,976
Investment securities held-to-maturity |  |
Investment Securities Held-to-Maturity, Amortized Cost |  | 36,039
Investment Securities Held-to-Maturity, Gross Unrealized Gains |  | 719
Investment Securities Held-to-Maturity, Gross Unrealized Losses |  | (161)
Investment Securities Held-to-Maturity, Fair Value |  | 36,597
Asset-backed Securities [Member] |  |
Investment securities available-for-sale |  |
Investment Securities Available-for-Sale, Amortized Cost | 14,867 | 20,005
Investment Securities Available-for-Sale, Gross Unrealized Gains | 2 | 18
Investment Securities Available-for-Sale, Gross Unrealized Losses | (286) | (298)
Investment Securities Available-for-Sale, Fair Value | 14,583 | 19,725
Certificates of Deposit [Member] |  |
Investment securities available-for-sale |  |
Investment Securities Available-for-Sale, Amortized Cost | 973 | 1,895
Investment Securities Available-for-Sale, Gross Unrealized Gains | 10 | 18
Investment Securities Available-for-Sale, Gross Unrealized Losses |  | (8)
Investment Securities Available-for-Sale, Fair Value | 983 | 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 | 192 | 21
Investment Securities Available-for-Sale, Gross Unrealized Losses |  | (23)
Investment Securities Available-for-Sale, Fair Value | 568 | 374
Other Securities [Member] |  |
Investment securities available-for-sale |  |
Investment Securities Available-for-Sale, Amortized Cost | 14,739 | 18,303
Investment Securities Available-for-Sale, Gross Unrealized Gains |  |
Investment Securities Available-for-Sale, Gross Unrealized Losses | (325) | (153)
Investment Securities Available-for-Sale, Fair Value | $ 14,414 | 18,150
US Treasury Securities [Member] |  |
Investment securities held-to-maturity |  |
Investment Securities Held-to-Maturity, Amortized Cost |  | 28,471
Investment Securities Held-to-Maturity, Gross Unrealized Gains |  | 755
Investment Securities Held-to-Maturity, Gross Unrealized Losses |  |
Investment Securities Held-to-Maturity, Fair Value |  | $ 29,226

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