Defined Benefit Plans - Net Periodic Benefit Costs (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	$ 36	$ 33	$ 108	$ 98
Interest cost	43	40	130	120
Expected return on plan assets	(59)	(57)	(177)	(170)
Accretion of prior service cost	0	0	0	0
Amortization of net (gain) loss	(2)	0	(5)	0
Settlement gain			0	(49)
Net periodic benefit expense	18	16	55	(1)
Other Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	1	11	2
Interest cost	9	3	27	7
Expected return on plan assets	0	0	0	0
Accretion of prior service cost	(5)	(5)	(15)	(15)
Amortization of net (gain) loss	1	1	6	5
Settlement gain			0	0
Net periodic benefit expense	$ 6	$ 0	$ 29	$ (1)