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Securities (Reconciliation of fair value of securities) (Details) - USD ($) $ in Thousands | Sep. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Reconciliation of fair value of securities |  |
Available for sale Securities, Amortized Cost | $ 426,340 | $ 363,366
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 5,128 | 3,890
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | (2,343) | (3,612)
Available-for-sale Securities | 429,125 | 363,644
Held to maturity Securities, Amortized Cost | 478,798 | 487,076
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain | 4,061 | 3,556
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss | (3,197) | (4,982)
Held to Maturity, Fair Value, Total | 479,662 | 485,650
Amortized Cost | 905,138 | 850,442
Gross Unrealized Gains | 9,189 | 7,446
Unrealized Losses Other | (5,540) | (8,594)
Fair Value | 908,787 | 849,294
U. S. Government Agency Securities [Member] |  |
Reconciliation of fair value of securities |  |
Available for sale Securities, Amortized Cost | 23,010 | 24,006
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 218 | 238
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | 0 | 0
Available-for-sale Securities | 23,228 | 24,244
U.S. Treasury securities |  |
Reconciliation of fair value of securities |  |
Held to maturity Securities, Amortized Cost | 1,006 | 1,007
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain | 42 | 47
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss | 0 | 0
Held to Maturity, Fair Value, Total | 1,048 | 1,054
Agency mortgage-backed securities |  |
Reconciliation of fair value of securities |  |
Available for sale Securities, Amortized Cost | 211,757 | 173,268
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 3,060 | 2,852
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | (253) | (736)
Available-for-sale Securities | 214,564 | 175,384
Held to maturity Securities, Amortized Cost | 171,664 | 156,088
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain | 2,508 | 2,274
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss | (192) | (858)
Held to Maturity, Fair Value, Total | 173,980 | 157,504
Agency Collateralized Mortgage Obligations [Member] |  |
Reconciliation of fair value of securities |  |
Available for sale Securities, Amortized Cost | 115,504 | 101,094
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 405 | 106
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | (1,080) | (1,332)
Available-for-sale Securities | 114,829 | 99,868
Held to maturity Securities, Amortized Cost | 275,894 | 297,445
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain | 1,244 | 1,002
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss | (2,905) | (3,797)
Held to Maturity, Fair Value, Total | 274,233 | 294,650
State, County, and Municipal Securities [Member] |  |
Reconciliation of fair value of securities |  |
Available for sale Securities, Amortized Cost | 2,492 | 3,743
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 47 | 50
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | 0 | 0
Available-for-sale Securities | 2,539 | 3,793
Single Issuer Trust Preferred Securities Issued by Banks and Insurers [Member] |  |
Reconciliation of fair value of securities |  |
Available for sale Securities, Amortized Cost | 2,025 | 2,311
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 19 | 3
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | 0 | (3)
Available-for-sale Securities | 2,044 | 2,311
Held to maturity Securities, Amortized Cost | 1,500 | 1,500
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain | 39 | 44
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss | 0 | 0
Held to Maturity, Fair Value, Total | 1,539 | 1,544
Pooled trust preferred securities issued by banks and insurers |  |
Reconciliation of fair value of securities |  |
Available for sale Securities, Amortized Cost | 2,182 | 2,200
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 0 | 0
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | (558) | (616)
Available-for-sale Securities | 1,624 | 1,584
Small Business Administration Pooled Securities [Member] |  |
Reconciliation of fair value of securities |  |
Available for sale Securities, Amortized Cost | 50,194 | 37,561
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 45 | 0
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | (53) | (372)
Available-for-sale Securities | 50,186 | 37,189
Held to maturity Securities, Amortized Cost | 28,734 | 31,036
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain | 228 | 189
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss | (100) | (327)
Held to Maturity, Fair Value, Total | 28,862 | 30,898
Equity securities |  |
Reconciliation of fair value of securities |  |
Available for sale Securities, Amortized Cost | 19,176 | 19,183
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 1,334 | 641
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | (399) | (553)
Available-for-sale Securities | $ 20,111 | $ 19,271

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