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Goodwill and Intangible Assets Reconciliation of Purchase Price to Goodwill (Details) - First BancTrust [Member] - USD ($) $ in Thousands | May 01, 2018 | Dec. 11, 2017 | Sep. 08, 2016
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Reconciliation of purchase price to goodwill recorded [Line Items] |  |  |
Purchase price (in excess of net book value) | $ 26,946 |  |
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Securities |  |  | $ 59,586
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Repossessed Assets |  |  | 535
Fair value of premises and equipment |  |  | 9,437
Fair value of time deposits |  |  | 385,624
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, FHLB Advances |  |  | 30,672
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Subordinated Debentures |  |  | 4,735
Business Combination, Net Fair Value Adjustments | 408 |  |
Resulting goodwill from acquisition | 27,354 | $ 27,400 |
Fair Value Adjustment [Member] |  |  |
Reconciliation of purchase price to goodwill recorded [Line Items] |  |  |
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Securities | 320 |  | 320
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Loans, net | 3,886 |  |
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Repossessed Assets | 12 |  | 12
Fair value of premises and equipment | 689 |  | 689
Fair value of time deposits | 1,301 |  | 1,301
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, FHLB Advances | (328) |  | (328)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Subordinated Debentures | (1,451) |  | $ (1,451)
Core deposit intangible | 5,224 |  |
Other assets | $ 1,203 |  |

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