Components of Net Periodic Benefit Cost - Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 297	$ 339	$ 892	$ 1,016
Interest cost	707	658	2,120	1,974
Expected return on plan assets	(1,227)	(1,178)	(3,682)	(3,535)
Net amortization of net (gain) loss	315	518	944	1,554
Net Periodic Benefit Cost	92	337	274	1,009
Post-Retirement Health Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	8	10	25	32
Interest cost	28	26	83	77
Net Periodic Benefit Cost	$ 36	$ 36	$ 108	$ 109