Business Combinations, Goodwill and Intangible Assets (Total Consideration Transferred and Fair Value of Assets Acquired and Liabilities Assumed) (Details) - USD ($) $ in Thousands	Jan. 01, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Recognized Amounts of Identifiable Assets Acquired and Liabilities Assumed:
Goodwill		$ 180,357	$ 121,761	$ 121,956	$ 121,306
Citizens Union Bancorp of Shelbyville, Inc. ("CUB")
Consideration
Cash for Options and Fractional Shares	$ 942
Cash Consideration	49,863
Equity Instruments	111,914
Fair Value of Total Consideration Transferred	162,719
Recognized Amounts of Identifiable Assets Acquired and Liabilities Assumed:
Cash	20,244
Federal Funds Sold and Other Short-term Investments	238,325
Interest-bearing Time Deposits with Banks	250
Securities	102,233
Loans	678,142
Stock in FHLB of Indianapolis and Other Restricted Stock, at Cost	10,078
Premises, Furniture & Equipment	19,805
Other Real Estate	40
Intangible Assets	7,572
Company Owned Life Insurance	12,881
Accrued Interest Receivable and Other Assets	18,309
Deposits - Non-interest Bearing	(237,472)
Deposits - Interest Bearing	(696,750)
FHLB Advances and Other Borrowings	(60,837)
Accrued Interest Payable and Other Liabilities	(8,697)
Total Identifiable Net Assets	104,123
Goodwill	$ 58,596