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Loans and Allowance for Loan Losses Loans and Allowance for Loan Losses (PCI Loans) (Details) - USD ($) | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Nov. 15, 2018 | May 01, 2018 | Dec. 31, 2017
Carrying Amount [Abstract] |  |  |  |  |
Loans Receivable, Net | $ 2,695,347,000 | $ 2,644,519,000 |  |  |
Loans and Leases Receivable, Net Amount | 2,666,616,000 | 2,616,822,000 |  |  |
Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |  |
Carrying Amount [Abstract] |  |  |  |  |
Loans Receivable, Net | 4,951,000 | 2,937,000 |  |  |
Financing Receivable, Allowance for Credit Losses | 365,000 | 1,235,000 |  |  | $ 9,000
Financing Receivable, Allowance for Credit Losses Reversed | 1,229,000 | 65,000 |  |  |
Loans and Leases Receivable, Net Amount | 4,586,000 | 1,702,000 |  |  |
Contractual Payments at Acquisition [Abstract] |  |  |  |  |
Financing Receivable, Net | 4,951,000 | 15,623,000 |  |  | 259,000
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion | 910,000 |  |  |  |
Construction Loans [Member] |  |  |  |  |
Carrying Amount [Abstract] |  |  |  |  |
Loans Receivable, Net | 94,142,000 | 50,619,000 |  |  |
Construction Loans [Member] | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |  |
Carrying Amount [Abstract] |  |  |  |  |
Loans Receivable, Net | 256,000 | 872,000 |  |  |
1-4 Family residential properties |  |  |  |  |
Carrying Amount [Abstract] |  |  |  |  |
Loans Receivable, Net | 336,427,000 | 373,518,000 |  |  |
1-4 Family residential properties | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |  |
Carrying Amount [Abstract] |  |  |  |  |
Loans Receivable, Net | 371,000 | 206,000 |  |  |
Multifamily residential properties |  |  |  |  |
Carrying Amount [Abstract] |  |  |  |  |
Loans Receivable, Net | 153,948,000 | 184,051,000 |  |  |
Multifamily residential properties | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |  |
Carrying Amount [Abstract] |  |  |  |  |
Loans Receivable, Net | 2,077,000 | 891,000 |  |  |
Commercial real estate |  |  |  |  |
Carrying Amount [Abstract] |  |  |  |  |
Loans Receivable, Net | 995,702,000 | 906,850,000 |  |  |
Commercial real estate | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |  |
Carrying Amount [Abstract] |  |  |  |  |
Loans Receivable, Net | 2,247,000 | 946,000 |  |  |
Loans secured by real estate |  |  |  |  |
Carrying Amount [Abstract] |  |  |  |  |
Loans Receivable, Net | 1,820,460,000 | 1,746,738,000 |  |  |
Loans secured by real estate | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |  |
Carrying Amount [Abstract] |  |  |  |  |
Loans Receivable, Net | 4,951,000 | 2,915,000 |  |  |
Agricultural Loans [Member] |  |  |  |  |
Carrying Amount [Abstract] |  |  |  |  |
Loans Receivable, Net | 136,124,000 | 135,877,000 |  |  |
Agricultural Loans [Member] | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |  |
Carrying Amount [Abstract] |  |  |  |  |
Loans Receivable, Net | 0 | 4,000 |  |  |
Commercial and industrial loans |  |  |  |  |
Carrying Amount [Abstract] |  |  |  |  |
Loans Receivable, Net | 528,973,000 | 557,011,000 |  |  |
Commercial and industrial loans | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |  |
Carrying Amount [Abstract] |  |  |  |  |
Loans Receivable, Net | 0 | 15,000 |  |  |
Consumer Loan [Member] |  |  |  |  |
Carrying Amount [Abstract] |  |  |  |  |
Loans Receivable, Net | 83,183,000 | 91,516,000 |  |  |
Consumer Loan [Member] | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |  |
Carrying Amount [Abstract] |  |  |  |  |
Loans Receivable, Net | 0 | 3,000 |  |  |
Financing Receivable, Allowance for Credit Losses | 0 | 0 |  |  | 0
Contractual Payments at Acquisition [Abstract] |  |  |  |  |
Financing Receivable, Net | $ 0 | $ 3,000 |  |  | $ 0
First BancTrust [Member] | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |  |
Contractual Payments at Acquisition [Abstract] |  |  |  |  |
Business Combination, Acquired Receivables, Gross Contractual Amount |  |  |  | $ 20,357,000 |
Certain Loans Acquired In A Transfer. Nonaccretable Difference |  |  |  | (4,231,000) |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, Cash Flows Expected to be Collected at Acquisition |  |  |  | 16,126,000 |
Certain Loans Acquired in Transfer, Accretable Yield |  |  |  | 0 |
Business Combination, Acquired Receivable, Fair Value |  |  |  | $ 16,126,000 |
SCB Bancorp [Member] | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |  |
Contractual Payments at Acquisition [Abstract] |  |  |  |  |
Business Combination, Acquired Receivables, Gross Contractual Amount |  |  | $ 3,282,000 |  |
Certain Loans Acquired In A Transfer. Nonaccretable Difference |  |  | (688,000) |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, Cash Flows Expected to be Collected at Acquisition |  |  | 2,594,000 |  |
Certain Loans Acquired in Transfer, Accretable Yield |  |  | 0 |  |
Business Combination, Acquired Receivable, Fair Value |  |  | $ 2,594,000 |  |

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- Definition The aggregate deficiency of a loan's cash flows expected to be collected over the investor's initial investment in the loan. This relates to loans with deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable. + References No definition available. + Details
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- Definition The aggregate excess of a loan's cash flows expected to be collected over the investor's initial investment in the loan. This relates to loans with deteriorating of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable. + References No definition available. + Details
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