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Securities (Reconciliation of fair value of securities) (Details) - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018
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Reconciliation of fair value of securities |  |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | $ 6,002 | $ 1,233
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | (495) | (9,029)
Debt Securities, Available-for-sale | 393,148 | 442,752
Debt Securities, Available-for-sale, Amortized Cost | 387,641 | 450,548
Held to maturity Securities, Amortized Cost | 797,359 | 611,490
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain | 12,733 | 2,533
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss | (1,436) | (10,383)
Held to Maturity, Fair Value, Total | 808,656 | 603,640
Amortized Cost | 1,185,000 | 1,062,038
Gross Unrealized Gains | 18,735 | 3,766
Unrealized Losses Other | (1,931) | (19,412)
Debt Securities, Available-for-sale and Held-to-maturity | 1,201,804 | 1,046,392
U.S. Government agency securities |  |
Reconciliation of fair value of securities |  |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 453 |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | (6) | (439)
Debt Securities, Available-for-sale | 32,923 | 32,038
Debt Securities, Available-for-sale, Amortized Cost | 32,476 | 32,477
Held to maturity Securities, Amortized Cost | 12,833 | 0
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain | 130 |
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss | 0 | 0
Held to Maturity, Fair Value, Total | 12,963 |
U.S. Treasury securities |  |
Reconciliation of fair value of securities |  |
Held to maturity Securities, Amortized Cost | 1,003 | 1,004
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain | 21 | 11
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss | 0 | 0
Held to Maturity, Fair Value, Total | 1,024 | 1,015
Agency mortgage-backed securities |  |
Reconciliation of fair value of securities |  |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 3,024 | 1,020
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | (41) | (3,406)
Debt Securities, Available-for-sale | 197,665 | 220,105
Debt Securities, Available-for-sale, Amortized Cost | 194,682 | 222,491
Held to maturity Securities, Amortized Cost | 423,825 | 252,484
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain | 7,488 | 1,548
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss | (46) | (3,104)
Held to Maturity, Fair Value, Total | 431,267 | 250,928
Agency Collateralized Mortgage Obligations [Member] |  |
Reconciliation of fair value of securities |  |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 1,420 | 197
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | (76) | (3,435)
Debt Securities, Available-for-sale | 98,643 | 134,911
Debt Securities, Available-for-sale, Amortized Cost | 97,299 | 138,149
Held to maturity Securities, Amortized Cost | 324,441 | 332,775
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain | 4,627 | 869
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss | (1,350) | (6,920)
Held to Maturity, Fair Value, Total | 327,718 | 326,724
US States and Political Subdivisions Debt Securities [Member] |  |
Reconciliation of fair value of securities |  |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 23 | 16
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 0 | 0
Debt Securities, Available-for-sale | 1,738 | 1,735
Debt Securities, Available-for-sale, Amortized Cost | 1,715 | 1,719
Single Issuer Trust Preferred Securities Issued by Banks and Insurers [Member] |  |
Reconciliation of fair value of securities |  |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 0 | (10)
Debt Securities, Available-for-sale | 717 | 707
Debt Securities, Available-for-sale, Amortized Cost | 717 | 717
Held to maturity Securities, Amortized Cost | 1,500 | 1,500
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain | 0 | 0
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss | (10) | (10)
Held to Maturity, Fair Value, Total | 1,490 | 1,490
Pooled trust preferred securities issued by banks and insurers |  |
Reconciliation of fair value of securities |  |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 0 | 0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | (372) | (349)
Debt Securities, Available-for-sale | 1,281 | 1,329
Debt Securities, Available-for-sale, Amortized Cost | 1,653 | 1,678
Small Business Administration Pooled Securities [Member] |  |
Reconciliation of fair value of securities |  |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 1,082 | 0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 0 | (1,390)
Debt Securities, Available-for-sale | 60,181 | 51,927
Debt Securities, Available-for-sale, Amortized Cost | 59,099 | 53,317
Held to maturity Securities, Amortized Cost | 33,757 | 23,727
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain | 467 | 105
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss | (30) | (349)
Held to Maturity, Fair Value, Total | $ 34,194 | $ 23,483

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