Business Combinations, Goodwill and Intangible Assets (Narrative) (Details)		12 Months Ended
	Jan. 01, 2022 USD ($) banking_office $ / shares shares	Dec. 31, 2022 USD ($) banking_office	Dec. 31, 2021 USD ($) banking_office	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Business Acquisition [Line Items]
Number of banking offices (in banking offices) | banking_office		77
Total Assets		$ 6,155,991,000	$ 5,608,539,000	$ 4,977,577,000
Loans		3,788,645,000	3,007,926,000
Goodwill		180,357,000	121,761,000	121,956,000	$ 121,306,000
Acquired Loan Balance		516,669,000
Allowance for credit losses		44,168,000	37,017,000	46,859,000	16,278,000
Decrease in goodwill attributable to sale of branches			195,000
Goodwill impairment		0	0	0
Amortization of expense intangible assets		3,711,000	$ 2,731,000	3,539,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Brank Branches
Business Acquisition [Line Items]
Number of branches sold (in banking offices) | banking_office			2
Core Banking
Business Acquisition [Line Items]
Goodwill		179,025,000	$ 120,429,000	120,624,000
Insurance
Business Acquisition [Line Items]
Goodwill		1,332,000	$ 1,332,000	1,332,000
Loans Acquired With Deteriorated Credit Quality | Adjustment
Business Acquisition [Line Items]
Allowance for credit losses					$ 6,886,000
Citizens Union Bancorp of Shelbyville, Inc. ("CUB")
Business Acquisition [Line Items]
Direct acquisition costs	$ 12,323,000
Goodwill	58,596,000
Intangible Assets	7,572,000
Cash paid	50,800,000
Fair Value	678,142,000
Acquired Loan Balance	683,501,000
Merger related costs		12,323,000
Additional goodwill recorded				$ 650,000
Citizens Union Bancorp of Shelbyville, Inc. ("CUB") | Adjustment
Business Acquisition [Line Items]
Allowance for credit losses		$ 6,300,000
Citizens Union Bancorp of Shelbyville, Inc. ("CUB") | Loans Acquired With Deteriorated Credit Quality
Business Acquisition [Line Items]
Fair Value	29,868,000
Acquired Loan Balance	34,453,000
Estimated contractual cash flows of purchased financial asset with credit deterioration	$ 3,117,000
Citizens Union Bancorp of Shelbyville, Inc. ("CUB") | Common Stock
Business Acquisition [Line Items]
Cash payment for each share exchanged (in dollars per share) | $ / shares	$ 13.44
Fixed exchange ratio (in shares) | shares	0.7739
Shares of common stock issued for acquisition (in shares) | shares	2,870,975
Citizens Union Bancorp of Shelbyville, Inc. ("CUB") | Core Deposit Intangible
Business Acquisition [Line Items]
Intangible Assets	$ 7,572,000
Weighted average useful live of intangibles	8 years
Citizens Union Bancorp of Shelbyville, Inc. ("CUB")
Business Acquisition [Line Items]
Number of banking offices (in banking offices) | banking_office	15
Citizens Union Bancorp of Shelbyville, Inc. ("CUB") | Citizens Union Bancorp of Shelbyville, Inc. ("CUB")
Business Acquisition [Line Items]
Total Assets	$ 1,108,546,000
Loans	683,807,000
Deposits	$ 930,533,000