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Comprehensive Income - Reclassifications (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Comprehensive Income
Gain (loss) on sale of available-for-sale securities	$ 0	$ 0	$ (1,536)	$ 650
Income taxes	(1,218)	(184)	(3,639)	(1,563)
Salaries and employee benefits	(16,016)	(15,905)	(48,508)	(48,217)
Interest on investment securities	1,056	897	4,133	2,383
Amount reclassified from AOCI
Comprehensive Income
Realized gain (loss) recognized in income, net of tax	(22)	(122)	(1,013)	362
Available-for-sale securities | Amount reclassified from AOCI
Comprehensive Income
Gain (loss) on sale of available-for-sale securities	0	0	(1,536)	650
Income taxes	0	0	369	(152)
Realized gain (loss) recognized in income, net of tax	0	0	(1,167)	498
Defined benefit pension plan items | Amount reclassified from AOCI
Comprehensive Income
Income taxes	7	27	21	79
Realized gain (loss) recognized in income, net of tax	(22)	(80)	(66)	(242)
Salaries and employee benefits	(29)	(107)	(87)	(321)
Investment hedge | Amount reclassified from AOCI
Comprehensive Income
Income taxes	0	14	(69)	(35)
Realized gain (loss) recognized in income, net of tax	0	(42)	220	106
Interest on investment securities	$ 0	$ (56)	$ 289	$ 141

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