Loans - Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Allowance for Credit Losses [Roll Forward]
Beginning balance	$ 45,031	$ 39,995	$ 37,017	$ 46,859
Acquisition of Citizens Union Bank of Shelbyville, KY			3,117
Provision (Benefit) for Credit Losses	350	(2,000)	5,850	(8,500)
Loans charged-off	(820)	(279)	(1,636)	(892)
Recoveries collected	138	82	351	331
Total ending allowance balance	44,699	37,798	44,699	37,798
Commercial and Industrial Loans
Allowance for Credit Losses [Roll Forward]
Beginning balance	13,545	6,080	9,554	6,445
Acquisition of Citizens Union Bank of Shelbyville, KY			376
Provision (Benefit) for Credit Losses	141	1,965	3,803	1,747
Loans charged-off	(238)	0	(299)	(190)
Recoveries collected	7	9	21	52
Total ending allowance balance	13,455	8,054	13,455	8,054
Commercial Real Estate Loans
Allowance for Credit Losses [Roll Forward]
Beginning balance	22,349	24,220	19,245	29,878
Acquisition of Citizens Union Bank of Shelbyville, KY			1,945
Provision (Benefit) for Credit Losses	(210)	(2,833)	1,013	(8,502)
Loans charged-off	(1)	0	(79)	(10)
Recoveries collected	5	5	19	26
Total ending allowance balance	22,143	21,392	22,143	21,392
Agricultural Loans
Allowance for Credit Losses [Roll Forward]
Beginning balance	4,628	5,847	4,505	6,756
Acquisition of Citizens Union Bank of Shelbyville, KY			689
Provision (Benefit) for Credit Losses	(99)	(1,152)	(665)	(2,061)
Loans charged-off	0	0	0	0
Recoveries collected	0	0	0	0
Total ending allowance balance	4,529	4,695	4,529	4,695
Leases
Allowance for Credit Losses [Roll Forward]
Beginning balance	191	204	200	200
Acquisition of Citizens Union Bank of Shelbyville, KY			0
Provision (Benefit) for Credit Losses	27	(1)	18	3
Loans charged-off	0	0	0	0
Recoveries collected	0	0	0	0
Total ending allowance balance	218	203	218	203
Consumer Loans
Allowance for Credit Losses [Roll Forward]
Beginning balance	668	460	507	490
Acquisition of Citizens Union Bank of Shelbyville, KY			2
Provision (Benefit) for Credit Losses	305	167	823	234
Loans charged-off	(495)	(204)	(1,027)	(472)
Recoveries collected	116	60	289	231
Total ending allowance balance	594	483	594	483
Home Equity Loans
Allowance for Credit Losses [Roll Forward]
Beginning balance	1,233	908	1,061	996
Acquisition of Citizens Union Bank of Shelbyville, KY			0
Provision (Benefit) for Credit Losses	85	124	309	30
Loans charged-off	(5)	(15)	(57)	(15)
Recoveries collected	0	0	0	6
Total ending allowance balance	1,313	1,017	1,313	1,017
Credit Cards
Allowance for Credit Losses [Roll Forward]
Beginning balance	239	181	240	150
Acquisition of Citizens Union Bank of Shelbyville, KY			0
Provision (Benefit) for Credit Losses	52	19	131	186
Loans charged-off	(63)	(16)	(153)	(158)
Recoveries collected	8	8	18	14
Total ending allowance balance	236	192	236	192
Residential Mortgage Loans
Allowance for Credit Losses [Roll Forward]
Beginning balance	2,178	2,095	1,705	1,944
Acquisition of Citizens Union Bank of Shelbyville, KY			105
Provision (Benefit) for Credit Losses	49	(289)	418	(137)
Loans charged-off	(18)	(44)	(21)	(47)
Recoveries collected	2	0	4	2
Total ending allowance balance	2,211	1,762	2,211	1,762
Unallocated
Allowance for Credit Losses [Roll Forward]
Beginning balance	0	0	0	0
Acquisition of Citizens Union Bank of Shelbyville, KY			0
Provision (Benefit) for Credit Losses	0	0	0	0
Loans charged-off	0	0	0	0
Recoveries collected	0	0	0	0
Total ending allowance balance	$ 0	$ 0	$ 0	$ 0