Business Combinations Estimated Fair Values Of Assets Acquired And Liabilities Assumed (Details) - USD ($)	Nov. 15, 2018	May 01, 2018	Dec. 31, 2018
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, YTD Transaction Costs			$ 7,300,000
SCB Bancorp [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents	$ 65,112,000
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	11,343,000
Business Acquisition, Goodwill, Non-deductible Amount	18,636,000
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	18,895,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	479,056,000
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	15,904,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	411,750,000
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, YTD Transaction Costs			$ 907,000
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	65,112,000
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	6,782,000
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	24,821,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	457,324,000
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	15,904,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	412,122,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	45,202,000
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, Finite-Lived Intangibles		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	1,228,000
Business Acquisition, Goodwill, Non-deductible Amount	11,854,000
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	(5,926,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	21,732,000
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	22,104,000
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)