Qualified Employee Benefit Plans - Reconciliation of Amounts Recognized in Other Comprehensive Income for the Retirement Plan (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Recognized actuarial gain (loss)	$ 15,743
Amortization of prior service cost	24
Changes in employee benefit related items	15,767	$ (4,256)	$ (7,867)
Income tax (expense) benefit	(59)	(187)	274
Employee benefit related items, net of tax	15,708	(4,443)	(7,593)
Retirement Plan
Defined Benefit Plan Disclosure [Line Items]
Recognized actuarial gain (loss)	15,858
Amortization of prior service cost	24
Changes in employee benefit related items	15,882	(4,065)	(7,910)
Income tax (expense) benefit	(87)	(216)	312
Employee benefit related items, net of tax	15,795	$ (4,281)	$ (7,598)
Retired Individual Plan
Defined Benefit Plan Disclosure [Line Items]
Recognized actuarial gain (loss)	16
Amortization of prior service cost	0
Changes in employee benefit related items	16
Income tax (expense) benefit	(1)
Employee benefit related items, net of tax	15
Foreign Retirement Plans
Defined Benefit Plan Disclosure [Line Items]
Recognized actuarial gain (loss)	(131)
Amortization of prior service cost	0
Changes in employee benefit related items	(131)
Income tax (expense) benefit	29
Employee benefit related items, net of tax	$ (102)