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v3.7.0.1

Investment Securities (Details) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2017 USD ($) securities | Mar. 31, 2016 USD ($) | Dec. 31, 2016 USD ($)
Available-for-sale: [Abstract] |  |  |
Amortized Cost | $ 698,142 |  | $ 628,895
Gross Unrealized Gains | 3,340 |  | 2,037
Gross Unrealized (Losses) | (7,161) |  | (11,084)
Fair Value | 694,321 |  | 619,848
Gain (Loss) on Sale of Securities, Net | 0 | $ 260 |
Held-to-maturity: [Abstract] |  |  |
Held-to-maturity Securities | 74,256 |  | 74,231
Held-to-maturity Securities, Fair Value | 73,754 |  | 73,096
Realized Investment Gains (Losses) [Abstract] |  |  |
Gross gains | 0 | 260 |
Gross losses |  | $ 0 |
U.S. Treasury securities and obligations of U.S. government corporations & agencies |  |  |
Available-for-sale: [Abstract] |  |  |
Amortized Cost | 160,380 |  | 138,819
Gross Unrealized Gains | 198 |  | 13
Gross Unrealized (Losses) | (1,793) |  | (2,508)
Fair Value | 158,785 |  | 136,324
Held-to-maturity: [Abstract] |  |  |
Held-to-maturity Securities | 74,256 |  | 74,231
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain | 301 |  | 203
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss | (803) |  | (1,338)
Held-to-maturity Securities, Fair Value | 73,754 |  | 73,096
Obligations of states and political subdivisions |  |  |
Available-for-sale: [Abstract] |  |  |
Amortized Cost | 176,808 |  | 164,163
Gross Unrealized Gains | 1,918 |  | 1,346
Gross Unrealized (Losses) | (1,706) |  | (2,804)
Fair Value | 177,020 |  | 162,705
Mortgage-backed securities: GSE residential |  |  |
Available-for-sale: [Abstract] |  |  |
Amortized Cost | 353,907 |  | 318,829
Gross Unrealized Gains | 1,083 |  | 531
Gross Unrealized (Losses) | (2,277) |  | (4,369)
Fair Value | 352,713 |  | 314,991
Trust preferred securities |  |  |
Available-for-sale: [Abstract] |  |  |
Amortized Cost | 3,013 |  | 3,050
Gross Unrealized Gains | 0 |  | 0
Gross Unrealized (Losses) | (1,375) |  | (1,398)
Fair Value | $ 1,638 |  | 1,652
Number of trust preferred securities | securities | 1 |  |
Trust preferred securities | Maximum [Member] |  |  |
Available-for-sale: [Abstract] |  |  |
Maturities of Debt Securities | twenty years |  |
Other securities |  |  |
Available-for-sale: [Abstract] |  |  |
Amortized Cost | $ 4,034 |  | 4,034
Gross Unrealized Gains | 141 |  | 147
Gross Unrealized (Losses) | (10) |  | (5)
Fair Value | $ 4,165 |  | $ 4,176

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