Pensions and Other Post-Employment Benefits - Summary of Cumulative Net Gain (Loss) by Component, Net of Tax, Within Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Pension Benefits
Change in other comprehensive income
OCI at beginning of year	$ 48,673	$ 48,073	$ 65,409
Recognized during year — prior service cost (credit)	82	0	(3,811)
Recognized during year — net actuarial (losses) gains	(2,344)	(1,678)	(3,304)
Occurring during year — prior service cost	0	(799)	0
Occurring during year — net actuarial losses (gains)	(4,553)	3,146	2,062
Other adjustments	0	(94)	(12,212)
Foreign currency exchange rate changes	524	25	(71)
OCI at end of year	42,382	48,673	48,073
Other Benefits
Change in other comprehensive income
OCI at beginning of year	(7,525)	(9,578)	(8,976)
Recognized during year — prior service cost (credit)	1,497	1,497	1,497
Recognized during year — net actuarial (losses) gains	275	332	93
Occurring during year — prior service cost	0	0	0
Occurring during year — net actuarial losses (gains)	(345)	224	(2,192)
Other adjustments	0	0	0
Foreign currency exchange rate changes	0	0	0
OCI at end of year	$ (6,098)	$ (7,525)	$ (9,578)