Accumulated Other Comprehensive Income (Loss) - Amount Reclassified from AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Accumulated Other Comprehensive Income (Loss)
Employee benefits transition asset	$ 808	$ 785	$ 2,322	$ 2,050
Employee benefits actuarial gains	250	247	741	770
Total before tax	9,709	6,927	18,753	19,561
Provision for income taxes	1,856	1,351	3,460	3,767
Net of tax	7,853	5,576	15,293	15,794
Reclassifications out of accumulated other comprehensive income (loss) | Amortization of defined benefit pension
Accumulated Other Comprehensive Income (Loss)
Employee benefits transition asset	(7)	(11)	(21)	(36)
Employee benefits actuarial gains		5		16
Total before tax	(7)	(6)	(21)	(20)
Provision for income taxes	1	1	3	4
Net of tax	(8)	(5)	(24)	(16)
Reclassifications out of accumulated other comprehensive income (loss) | Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss)
Net of tax	$ (8)	$ (5)	$ (24)	$ (16)