Business Combinations, Goodwill and Intangible Assets (Total Consideration Transferred and Fair Value of Assets Acquired and Liabilities Assumed) (Details) - USD ($) $ in Thousands					12 Months Ended
	Jul. 01, 2019	Oct. 15, 2018	Oct. 14, 2018	May 18, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Consideration
Total Cash Received from First Financial					$ 0	$ 42,700	$ 0
Recognized Amounts of Identifiable Assets Acquired and Liabilities Assumed:
Goodwill					121,306	103,681	54,058	$ 54,058
Citizens First
Consideration
Cash for Options and Fractional Shares	$ 216
Cash Consideration	15,294
Equity Instruments	50,118
Fair Value of Total Consideration Transferred	65,628
Total Cash Received from First Financial					$ 5,545	$ 0	$ 0
Recognized Amounts of Identifiable Assets Acquired and Liabilities Assumed:
Cash	21,055
Interest-bearing Time Deposits with Banks	2,231
Securities	43,839
Loans	356,970
Stock in FHLB of Indianapolis and Other Restricted Stock, at Cost	2,065
Premises, Furniture & Equipment	10,772
Other Real Estate	0
Intangible Assets	4,547
Company Owned Life Insurance	8,796
Accrued Interest Receivable and Other Assets	3,863
Deposits - Non-interest Bearing	(52,521)
Deposits - Interest Bearing	(318,966)
FHLB Advances and Other Borrowings	(31,068)
Accrued Interest Payable and Other Liabilities	(3,044)
Total Identifiable Net Assets	48,539
Goodwill	$ 17,089
First Security
Consideration
Cash for Options and Fractional Shares		$ 132	$ 124
Cash Consideration		31,039
Equity Instruments		64,898	$ 29,886
Fair Value of Total Consideration Transferred		96,069
Recognized Amounts of Identifiable Assets Acquired and Liabilities Assumed:
Cash		13,605
Interest-bearing Time Deposits with Banks		250
Securities		109,580
Loans		390,106
Stock in FHLB of Indianapolis and Other Restricted Stock, at Cost		2,607
Premises, Furniture & Equipment		11,149
Other Real Estate		468
Intangible Assets		6,139
Company Owned Life Insurance		13,135
Accrued Interest Receivable and Other Assets		6,126
Deposits - Non-interest Bearing		(66,112)
Deposits - Interest Bearing		(358,285)
FHLB Advances and Other Borrowings		(73,275)
Accrued Interest Payable and Other Liabilities		(2,618)
Total Identifiable Net Assets		52,875
Goodwill		$ 43,194
Branch Acquisition
Consideration
Total Cash Received from First Financial				$ 41,826
Recognized Amounts of Identifiable Assets Acquired and Liabilities Assumed:
Cash				756
Loans				116,305
Premises, Furniture & Equipment				5,666
Intangible Assets				3,475
Accrued Interest Receivable and Other Assets				780
Deposits - Non-interest Bearing				(39,607)
Deposits - Interest Bearing				(136,096)
Accrued Interest Payable and Other Liabilities				(70)
Total Identifiable Net Assets				(48,791)
Goodwill				$ 6,965