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Business Combinations Assets Acquired and Liabilities Assumed (Details) - USD ($) |  |  | 9 Months Ended
--- | --- | --- | ---
Nov. 15, 2018 | May 01, 2018 | Sep. 30, 2019 | Sep. 30, 2018
SCB Bancorp [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Cash and due from banks | $ 65,095,000 |  |  |
Investment Securities | (97,504,000) |  |  |
Loans | (247,561,000) |  |  |
Allowance for loan losses | 0 |  |  |
Other real estate owned | (438,000) |  |  |
Premises and equipment | (11,068,000) |  |  |
Goodwill | 18,351,000 |  |  |
Core deposit intangible | 7,269,000 |  |  |
Other Intangibles | 12,298,000 |  |  |
Other assets | (19,045,000) |  |  |
Total assets acquired | 478,629,000 |  |  |
Deposits | 347,971,000 |  |  |
Securities sold under agreements to repurchase | 21,180,000 |  |  |
FHLB advances | 18,971,000 |  |  |
Other borrowings | 7,724,000 |  |  |
Junior subordinated debentures | 0 |  |  |
Other liabilities | 15,477,000 |  |  |
Total liabilities assumed | (411,323,000) |  |  |
Net assets acquired | 67,306,000 |  |  |
Aggregate Total Of Cash Paid In Business Combination | 19,046,000 |  |  |
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable | 48,260,000 |  |  |
Business Combination, Value of Total Consideration Paid | $ 67,306,000 |  |  |
Business Combination, Acquisition Related Costs |  |  | $ 3,600,000 |
Business Acquisition YTD Transaction Costs |  |  | 2,700,000 |
Finite-Lived Intangible Asset, Useful Life | 10 years |  |  |
SCB Bancorp-Ag Services [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-Lived Intangible Asset, Useful Life | 12 years |  |  |
SCB Bancorp-Insurance [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-Lived Intangible Asset, Useful Life | 11 years |  |  |
First BancTrust [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Cash and due from banks |  | $ 20,598,000 |  |
Investment Securities |  | (59,586,000) |  |
Loans |  | (363,281,000) |  |
Allowance for loan losses |  | 0 |  |
Other real estate owned |  | (535,000) |  |
Premises and equipment |  | (9,437,000) |  |
Goodwill |  | 26,491,000 |  |
Core deposit intangible |  | 5,224,000 |  |
Other assets |  | (16,133,000) |  |
Total assets acquired |  | 501,285,000 |  | $ 501,285,000
Deposits |  | 385,624,000 |  |
FHLB advances |  | 30,672,000 |  |
Junior subordinated debentures |  | 4,735,000 |  |
Other liabilities |  | 8,629,000 |  |
Total liabilities assumed |  | (429,660,000) |  | (429,660,000)
Net assets acquired |  | 71,625,000 |  |
Aggregate Total Of Cash Paid In Business Combination |  | 10,275,000 |  | 10,275,000
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable |  | 61,350,000 |  | 61,350,000
Business Combination, Value of Total Consideration Paid |  | $ 71,625,000 |  | $ 71,625,000
Business Combination, Acquisition Related Costs |  |  | 5,200,000 |
Business Acquisition YTD Transaction Costs |  |  | $ 172,000 |
Finite-Lived Intangible Asset, Useful Life |  | 10 years |  |
Acquired Book Value [Member] | SCB Bancorp [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Cash and due from banks | $ 65,095,000 |  |  |
Investment Securities | (97,545,000) |  |  |
Loans | (255,429,000) |  |  |
Allowance for loan losses | (4,491,000) |  |  |
Other real estate owned | (783,000) |  |  |
Premises and equipment | (10,115,000) |  |  |
Goodwill | 6,745,000 |  |  |
Core deposit intangible | 0 |  |  |
Other Intangibles | 1,228,000 |  |  |
Other assets | (24,858,000) |  |  |
Total assets acquired | 457,307,000 |  |  |
Deposits | 348,314,000 |  |  |
Securities sold under agreements to repurchase | 21,180,000 |  |  |
FHLB advances | 19,000,000 |  |  |
Other borrowings | 7,724,000 |  |  |
Junior subordinated debentures | 0 |  |  |
Other liabilities | 15,477,000 |  |  |
Total liabilities assumed | (411,695,000) |  |  |
Net assets acquired | 45,612,000 |  |  |
Acquired Book Value [Member] | First BancTrust [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Cash and due from banks |  | $ 20,598,000 |  |
Investment Securities |  | (59,906,000) |  |
Loans |  | (371,156,000) |  |
Allowance for loan losses |  | (4,412,000) |  |
Other real estate owned |  | (547,000) |  |
Premises and equipment |  | (10,126,000) |  |
Goodwill |  | 543,000 |  |
Core deposit intangible |  | 0 |  |
Other assets |  | (16,389,000) |  |
Total assets acquired |  | 474,853,000 |  |
Deposits |  | 384,323,000 |  |
FHLB advances |  | 31,000,000 |  |
Junior subordinated debentures |  | 6,186,000 |  |
Other liabilities |  | 8,665,000 |  |
Total liabilities assumed |  | (430,174,000) |  |
Net assets acquired |  | 44,679,000 |  |
Fair Value Adjustment [Member] | SCB Bancorp [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Cash and due from banks | 0 |  |  |
Investment Securities | (41,000) |  |  |
Loans | (7,868,000) |  |  |
Allowance for loan losses | (4,491,000) |  |  |
Other real estate owned | (345,000) |  |  |
Premises and equipment | (953,000) |  |  |
Goodwill | 11,606,000 |  |  |
Core deposit intangible | 7,269,000 |  |  |
Other Intangibles | 11,070,000 |  |  |
Other assets | 5,813,000 |  |  |
Total assets acquired | 21,322,000 |  |  |
Deposits | (343,000) |  |  |
Securities sold under agreements to repurchase | 0 |  |  |
FHLB advances | (29,000) |  |  |
Other borrowings | 0 |  |  |
Junior subordinated debentures | 0 |  |  |
Other liabilities | 0 |  |  |
Total liabilities assumed | 372,000 |  |  |
Net assets acquired | 21,694,000 |  |  |
Fair Value Adjustment [Member] | SCB Bancorp-Ag Services [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Other Intangibles | 4,200,000 |  |  |
Fair Value Adjustment [Member] | SCB Bancorp-Insurance [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Other Intangibles | 8,100,000 |  |  |
Fair Value Adjustment [Member] | First BancTrust [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Cash and due from banks |  | 0 |  |
Investment Securities |  | (320,000) |  |
Loans |  | (7,875,000) |  |
Allowance for loan losses |  | (4,412,000) |  |
Other real estate owned |  | (12,000) |  |
Premises and equipment |  | (689,000) |  |
Goodwill |  | 25,948,000 |  |
Core deposit intangible |  | 5,224,000 |  |
Other Intangibles |  | (5,224,000) |  |
Other assets |  | (256,000) |  |
Total assets acquired |  | 26,432,000 |  |
Deposits |  | 1,301,000 |  |
FHLB advances |  | (328,000) |  |
Junior subordinated debentures |  | (1,451,000) |  |
Other liabilities |  | (36,000) |  |
Total liabilities assumed |  | (514,000) |  |
Net assets acquired |  | 26,946,000 |  |
Fair Value Adjustments, Accretable portion [Member] | SCB Bancorp [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Loans | $ 7,200,000 |  |  |
Fair Value Adjustments, Accretable portion [Member] | First BancTrust [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Loans |  | $ 3,600,000 |  |

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