Goodwill and Intangible Assets Reconciliation of purchase price to goodwill recorded (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2018	Jun. 30, 2017	Dec. 31, 2018	Nov. 15, 2018	May 01, 2018
Reconciliation of purchase price to goodwill recorded [Line Items]
Goodwill, Acquired During Period	$ 18,636
First BancTrust [Member]
Reconciliation of purchase price to goodwill recorded [Line Items]
Business Combination, Purchase Price					$ 26,946
Fair value of securities					59,586
Fair value of OREO					535
Fair value of premises and equipment					(9,437)
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Loans					363,281
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits					(385,624)
Fair value of FHLB advances					(30,672)
Fair value of subordinated debentures					(4,735)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill					(5,224)
Business Combination, Net Fair Value Adjustments					(455)
Goodwill Provisionally Recorded					27,400
Goodwill, Acquired During Period		$ 26,491	$ 26,500
SCB Bancorp [Member]
Reconciliation of purchase price to goodwill recorded [Line Items]
Business Combination, Purchase Price				$ 22,104
Fair value of securities				97,504
Fair value of OREO				438
Fair value of premises and equipment				(11,343)
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Loans				247,561
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits				(347,971)
Fair value of FHLB advances				(18,971)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				(12,298)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill				(7,269)
Business Combination, Net Fair Value Adjustments				(3,468)
Goodwill, Acquired During Period			$ 18,600
Fair Value Adjustments [Member] | First BancTrust [Member]
Reconciliation of purchase price to goodwill recorded [Line Items]
Fair value of securities					320
Fair value of loans					3,463
Fair value of OREO					12
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Mortgage Servicing Rights					(1,097)
Fair value of premises and equipment					689
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Loans					7,875
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits					(1,301)
Fair value of FHLB advances					328
Fair value of subordinated debentures					(1,451)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles					(5,224)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill					(5,224)
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Assets, Net					$ 1,860
Fair Value Adjustments [Member] | SCB Bancorp [Member]
Reconciliation of purchase price to goodwill recorded [Line Items]
Fair value of securities				41
Fair value of loans				3,377
Fair value of OREO				345
Fair value of premises and equipment				(1,228)
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Loans				7,868
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits				(343)
Fair value of FHLB advances				(29)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				(11,070)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill				(7,269)
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Assets, Net				$ 13,936