Loans - Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Allowance for Credit Losses [Roll Forward]
Beginning balance	$ 45,078	$ 45,099	$ 37,017	$ 46,859
Acquisition of Citizens Union Bank of Shelbyville, KY			3,117
Provision (Benefit) for Credit Losses	300	(5,000)	5,500	(6,500)
Loans charged-off	(447)	(241)	(816)	(613)
Recoveries collected	100	137	213	249
Total ending allowance balance	45,031	39,995	45,031	39,995
Commercial and Industrial Loans
Allowance for Credit Losses [Roll Forward]
Beginning balance	12,720	6,248	9,554	6,445
Acquisition of Citizens Union Bank of Shelbyville, KY			376
Provision (Benefit) for Credit Losses	874	(196)	3,662	(218)
Loans charged-off	(56)	0	(61)	(190)
Recoveries collected	7	28	14	43
Total ending allowance balance	13,545	6,080	13,545	6,080
Commercial Real Estate Loans
Allowance for Credit Losses [Roll Forward]
Beginning balance	23,217	28,540	19,245	29,878
Acquisition of Citizens Union Bank of Shelbyville, KY			1,945
Provision (Benefit) for Credit Losses	(873)	(4,335)	1,223	(5,669)
Loans charged-off	0	(1)	(78)	(10)
Recoveries collected	5	16	14	21
Total ending allowance balance	22,349	24,220	22,349	24,220
Agricultural Loans
Allowance for Credit Losses [Roll Forward]
Beginning balance	4,759	6,462	4,505	6,756
Acquisition of Citizens Union Bank of Shelbyville, KY			689
Provision (Benefit) for Credit Losses	(131)	(615)	(566)	(909)
Loans charged-off	0	0	0	0
Recoveries collected	0	0	0	0
Total ending allowance balance	4,628	5,847	4,628	5,847
Leases
Allowance for Credit Losses [Roll Forward]
Beginning balance	196	201	200	200
Acquisition of Citizens Union Bank of Shelbyville, KY			0
Provision (Benefit) for Credit Losses	(5)	3	(9)	4
Loans charged-off	0	0	0	0
Recoveries collected	0	0	0	0
Total ending allowance balance	191	204	191	204
Consumer Loans
Allowance for Credit Losses [Roll Forward]
Beginning balance	616	439	507	490
Acquisition of Citizens Union Bank of Shelbyville, KY			2
Provision (Benefit) for Credit Losses	293	85	518	67
Loans charged-off	(322)	(144)	(532)	(269)
Recoveries collected	81	80	173	172
Total ending allowance balance	668	460	668	460
Home Equity Loans
Allowance for Credit Losses [Roll Forward]
Beginning balance	1,207	965	1,061	996
Acquisition of Citizens Union Bank of Shelbyville, KY			0
Provision (Benefit) for Credit Losses	41	(63)	224	(94)
Loans charged-off	(15)	0	(52)	0
Recoveries collected	0	6	0	6
Total ending allowance balance	1,233	908	1,233	908
Credit Cards
Allowance for Credit Losses [Roll Forward]
Beginning balance	212	162	240	150
Acquisition of Citizens Union Bank of Shelbyville, KY			0
Provision (Benefit) for Credit Losses	73	108	79	167
Loans charged-off	(51)	(95)	(90)	(142)
Recoveries collected	5	6	10	6
Total ending allowance balance	239	181	239	181
Residential Mortgage Loans
Allowance for Credit Losses [Roll Forward]
Beginning balance	2,151	2,082	1,705	1,944
Acquisition of Citizens Union Bank of Shelbyville, KY			105
Provision (Benefit) for Credit Losses	28	13	369	152
Loans charged-off	(3)	(1)	(3)	(2)
Recoveries collected	2	1	2	1
Total ending allowance balance	2,178	2,095	2,178	2,095
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