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Securities (Reconciliation of fair value of securities) (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Reconciliation of fair value of securities |  |
Available for sale Securities, Amortized Cost | $ 454,575 | $ 448,219
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 1,137 | 3,740
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | (12,783) | (4,461)
Available-for-sale Securities | 442,929 | 447,498
Held to maturity Securities, Amortized Cost | 538,261 | 497,688
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain | 520 | 2,429
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss | (15,493) | (5,923)
Held to Maturity, Fair Value, Total | 523,288 | 494,194
Amortized Cost | 992,836 | 945,907
Gross Unrealized Gains | 1,657 | 6,169
Unrealized Losses Other | (28,276) | (10,384)
Fair Value | 966,217 | 941,692
U. S. Government Agency Securities [Member] |  |
Reconciliation of fair value of securities |  |
Available for sale Securities, Amortized Cost | 33,479 | 35,475
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax |  | 86
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | (760) | (131)
Available-for-sale Securities | 32,719 | 35,430
U.S. Treasury securities |  |
Reconciliation of fair value of securities |  |
Held to maturity Securities, Amortized Cost | 1,005 | 1,006
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain | 9 | 29
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss | 0 | 0
Held to Maturity, Fair Value, Total | 1,014 | 1,035
Agency mortgage-backed securities |  |
Reconciliation of fair value of securities |  |
Available for sale Securities, Amortized Cost | 219,409 | 214,934
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 1,019 | 1,897
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | (5,439) | (1,067)
Available-for-sale Securities | 214,989 | 215,764
Held to maturity Securities, Amortized Cost | 186,299 | 204,768
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain | 286 | 1,791
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss | (4,585) | (736)
Held to Maturity, Fair Value, Total | 182,000 | 205,823
Agency Collateralized Mortgage Obligations [Member] |  |
Reconciliation of fair value of securities |  |
Available for sale Securities, Amortized Cost | 150,122 | 124,098
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 90 | 78
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | (5,065) | (2,164)
Available-for-sale Securities | 145,147 | 122,012
Held to maturity Securities, Amortized Cost | 323,746 | 262,998
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain | 151 | 397
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss | (10,555) | (4,987)
Held to Maturity, Fair Value, Total | 313,342 | 258,408
State, County, and Municipal Securities [Member] |  |
Reconciliation of fair value of securities |  |
Available for sale Securities, Amortized Cost | 1,977 | 2,237
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 19 | 37
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | 0 | 0
Available-for-sale Securities | 1,996 | 2,274
Single Issuer Trust Preferred Securities Issued by Banks and Insurers [Member] |  |
Reconciliation of fair value of securities |  |
Available for sale Securities, Amortized Cost | 1,320 | 2,012
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 9 | 4
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | 0 | 0
Available-for-sale Securities | 1,329 | 2,016
Held to maturity Securities, Amortized Cost | 1,500 | 1,500
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain | 23 | 29
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss | 0 | 0
Held to Maturity, Fair Value, Total | 1,523 | 1,529
Pooled trust preferred securities issued by banks and insurers |  |
Reconciliation of fair value of securities |  |
Available for sale Securities, Amortized Cost | 2,166 | 2,179
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 0 | 0
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | (415) | (539)
Available-for-sale Securities | 1,751 | 1,640
Small Business Administration Pooled Securities [Member] |  |
Reconciliation of fair value of securities |  |
Available for sale Securities, Amortized Cost | 46,102 | 47,852
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 0 | 44
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | (1,104) | (118)
Available-for-sale Securities | 44,998 | 47,778
Held to maturity Securities, Amortized Cost | 25,711 | 27,416
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain | 51 | 183
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss | (353) | (200)
Held to Maturity, Fair Value, Total | 25,409 | 27,399
Equity securities |  |
Reconciliation of fair value of securities |  |
Available for sale Securities, Amortized Cost | 0 | 19,432
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax |  | 1,594
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | $ 0 | (442)
Available-for-sale Securities |  | $ 20,584

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