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Securities (Reconciliation of fair value of securities) (Details) - USD ($) $ in Thousands | Sep. 30, 2016 | Dec. 31, 2015
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Reconciliation of fair value of securities |  |
Available for sale Securities, Amortized Cost | $ 376,520 | $ 365,140
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 11,583 | 5,252
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | (1,095) | (3,143)
Available-for-sale Securities | 387,008 | 367,249
Held to maturity Securities, Amortized Cost | 430,763 | 477,507
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain | 11,627 | 5,177
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss | (556) | (3,935)
Held to Maturity, Fair Value, Total | 441,834 | 478,749
Amortized Cost | 807,283 | 842,647
Gross Unrealized Gains | 23,210 | 10,429
Unrealized Losses Other | (1,651) | (7,078)
Fair Value | 828,842 | 845,998
U. S. Government Agency Securities [Member] |  |
Reconciliation of fair value of securities |  |
Available for sale Securities, Amortized Cost | 24,502 | 29,958
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 804 | 261
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | 0 | (4)
Available-for-sale Securities | 25,306 | 30,215
U.S. Treasury securities |  |
Reconciliation of fair value of securities |  |
Held to maturity Securities, Amortized Cost | 1,008 | 1,009
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain | 81 | 55
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss | 0 | 0
Held to Maturity, Fair Value, Total | 1,089 | 1,064
Agency mortgage-backed securities |  |
Reconciliation of fair value of securities |  |
Available for sale Securities, Amortized Cost | 178,095 | 207,693
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 7,481 | 4,227
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | (3) | (983)
Available-for-sale Securities | 185,573 | 210,937
Held to maturity Securities, Amortized Cost | 148,822 | 167,134
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain | 6,309 | 3,460
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss | 0 | (219)
Held to Maturity, Fair Value, Total | 155,131 | 170,375
Agency Collateralized Mortgage Obligations [Member] |  |
Reconciliation of fair value of securities |  |
Available for sale Securities, Amortized Cost | 107,466 | 64,157
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 1,286 | 179
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | (156) | (752)
Available-for-sale Securities | 108,596 | 63,584
Held to maturity Securities, Amortized Cost | 246,744 | 267,348
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain | 4,072 | 1,195
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss | (556) | (3,652)
Held to Maturity, Fair Value, Total | 250,260 | 264,891
State, County, and Municipal Securities [Member] |  |
Reconciliation of fair value of securities |  |
Available for sale Securities, Amortized Cost | 4,255 | 4,543
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 105 | 116
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | 0 | 0
Available-for-sale Securities | 4,360 | 4,659
Held to maturity Securities, Amortized Cost | 0 | 225
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain | 0 | 2
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss | 0 | 0
Held to Maturity, Fair Value, Total | 0 | 227
Single Issuer Trust Preferred Securities Issued by Banks and Insurers [Member] |  |
Reconciliation of fair value of securities |  |
Available for sale Securities, Amortized Cost | 2,324 | 2,865
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 4 | 8
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | (31) | (81)
Available-for-sale Securities | 2,297 | 2,792
Held to maturity Securities, Amortized Cost | 1,500 | 1,500
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain | 47 | 22
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss | 0 | 0
Held to Maturity, Fair Value, Total | 1,547 | 1,522
Pooled trust preferred securities issued by banks and insurers |  |
Reconciliation of fair value of securities |  |
Available for sale Securities, Amortized Cost | 2,200 | 2,217
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 0 | 0
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | (662) | (645)
Available-for-sale Securities | 1,538 | 1,572
Small Business Administration Pooled Securities [Member] |  |
Reconciliation of fair value of securities |  |
Available for sale Securities, Amortized Cost | 38,678 | 40,472
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 1,202 | 87
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | 0 | (110)
Available-for-sale Securities | 39,880 | 40,449
Held to maturity Securities, Amortized Cost | 32,689 | 35,291
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain | 1,118 | 437
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss | 0 | (64)
Held to Maturity, Fair Value, Total | 33,807 | 35,664
Equity securities |  |
Reconciliation of fair value of securities |  |
Available for sale Securities, Amortized Cost | 19,000 | 13,235
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 701 | 374
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | (243) | (568)
Available-for-sale Securities | 19,458 | 13,041
Corporate debt securities |  |
Reconciliation of fair value of securities |  |
Held to maturity Securities, Amortized Cost | 0 | 5,000
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain | 0 | 6
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss | 0 | 0
Held to Maturity, Fair Value, Total | $ 0 | $ 5,006

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