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Business Combinations Estimated Fair Values Of Assets Acquired And Liabilities Assumed (Details) - USD ($) | Nov. 15, 2018 | May 01, 2018 | Dec. 31, 2019
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First BancTrust [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents |  | $ 20,598,000 |
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Securities |  | (59,586,000) |
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Loans |  | (363,281,000) |
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Allowance For Loan Losses |  | 0 |
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Repossessed Assets |  | (535,000) |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Premises And Equipment |  | 9,437,000 |
Business Acquisition, Goodwill, Non-deductible Amount |  | 26,491,000 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill |  | 5,224,000 |
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Assets |  | 16,133,000 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets |  | 501,285,000 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits |  | (385,624,000) |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, FHLB Advances |  | (30,672,000) |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Subordinated Debentures |  | (4,735,000) |
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Liabilities |  | 8,629,000 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities |  | 429,660,000 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net |  | $ 71,625,000 |
Finite-Lived Intangible Asset, Useful Life |  | 10 years |
Aggregate Total Of Cash Paid In Business Combination |  | $ 10,275,000 |
Business Acquisition, Equity Interest Issued or Issuable |  | 61,350,000 |
Business Combination, Value of Total Consideration Paid |  | $ 71,625,000 |
Business Acquisition, Transaction Costs |  |  | $ 5,200,000
Business Acquisition, YTD Transaction Costs |  |  | 191,000
SCB Bancorp [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents | $ 65,095,000 |  |
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Securities | (97,504,000) |  |
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Loans | (247,561,000) |  |
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Allowance For Loan Losses | 0 |  |
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Repossessed Assets | (438,000) |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Premises And Equipment | 11,068,000 |  |
Business Acquisition, Goodwill, Non-deductible Amount | 18,351,000 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill | 7,269,000 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles | 12,298,000 |  |
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Assets | 19,045,000 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets | 478,629,000 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits | (347,971,000) |  |
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Securities Sold Under Agreements to Repurchase | 21,180,000 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, FHLB Advances | (18,971,000) |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Long-term Debt | 7,724,000 |  |
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Liabilities | 15,477,000 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities | 411,323,000 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net | 67,306,000 |  |
Finite-Lived Intangible Asset, Useful Life |  | 10 years |
Aggregate Total Of Cash Paid In Business Combination | 19,046,000 |  |
Business Acquisition, Equity Interest Issued or Issuable | 48,260,000 |  |
Business Combination, Value of Total Consideration Paid | 67,306,000 |  |
Business Acquisition, Transaction Costs |  |  | 3,700,000
Business Acquisition, YTD Transaction Costs |  |  | $ 2,800,000
Acquired Book Value [Member] | First BancTrust [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents |  | $ 20,598,000 |
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Securities |  | (59,906,000) |
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Loans |  | (371,156,000) |
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Allowance For Loan Losses |  | (4,412,000) |
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Repossessed Assets |  | (547,000) |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Premises And Equipment |  | 10,126,000 |
Business Acquisition, Goodwill, Non-deductible Amount |  | 543,000 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill |  | 0 |
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Assets |  | 16,389,000 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets |  | 474,853,000 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits |  | (384,323,000) |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, FHLB Advances |  | (31,000,000) |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Subordinated Debentures |  | (6,186,000) |
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Liabilities |  | 8,665,000 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities |  | 430,174,000 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net |  | 44,679,000 |
Acquired Book Value [Member] | SCB Bancorp [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents | 65,095,000 |  |
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Securities | (97,545,000) |  |
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Loans | (255,429,000) |  |
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Allowance For Loan Losses | (4,491,000) |  |
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Repossessed Assets | (783,000) |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Premises And Equipment | 10,115,000 |  |
Business Acquisition, Goodwill, Non-deductible Amount | 6,745,000 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill | 0 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles | 1,228,000 |  |
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Assets | 24,858,000 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets | 457,307,000 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits | (348,314,000) |  |
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Securities Sold Under Agreements to Repurchase | 21,180,000 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, FHLB Advances | (19,000,000) |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Long-term Debt | 7,724,000 |  |
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Liabilities | 15,477,000 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities | 411,695,000 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net | 45,612,000 |  |
Fair Value Adjustments [Member] | First BancTrust [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Securities |  | (320,000) |
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Loans |  | (7,875,000) |
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Allowance For Loan Losses |  | (4,412,000) |
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Repossessed Assets |  | (12,000) |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Premises And Equipment |  | (689,000) |
Business Acquisition, Goodwill, Non-deductible Amount |  | 25,948,000 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill |  | 5,224,000 |
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Assets |  | (256,000) |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets |  | 26,432,000 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits |  | (1,301,000) |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, FHLB Advances |  | 328,000 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Subordinated Debentures |  | (1,451,000) |
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Liabilities |  | (36,000) |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities |  | (514,000) |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net |  | 26,946,000 |
Fair Value Adjustments [Member] | SCB Bancorp [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents | 0 |  |
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Securities | (41,000) |  |
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Loans | (7,868,000) |  |
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Allowance For Loan Losses | (4,491,000) |  |
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Repossessed Assets | (345,000) |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Premises And Equipment | 953,000 |  |
Business Acquisition, Goodwill, Non-deductible Amount | 11,606,000 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill | 7,269,000 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles | 11,070,000 |  |
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Assets | (5,813,000) |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets | 21,322,000 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits | (343,000) |  |
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Securities Sold Under Agreements to Repurchase | 0 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, FHLB Advances | (29,000) |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Long-term Debt | 0 |  |
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Liabilities | 0 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities | (372,000) |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net | 21,694,000 |  |
Fair Value Adjustments, Accretable portion [Member] | First BancTrust [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Loans |  | $ (3,600,000) |
Fair Value Adjustments, Accretable portion [Member] | SCB Bancorp [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Loans | $ (7,200,000) |  |

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