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, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Recognized actuarial gain	$ 9,135
Amortization of prior service cost	24
Changes in employee benefit related items	9,159	$ 6,946	$ 15,767
Income tax (expense)	(79)	(95)	(59)
Employee benefit related items, net of tax	9,080	6,851	15,708
Retirement Plan
Defined Benefit Plan Disclosure [Line Items]
Recognized actuarial gain	8,815
Amortization of prior service cost	24
Changes in employee benefit related items	8,839	6,543	15,882
Income tax (expense)	(9)	(33)	(87)
Employee benefit related items, net of tax	8,830	$ 6,510	$ 15,795
Retired Individual Plan
Defined Benefit Plan Disclosure [Line Items]
Recognized actuarial gain	(19)
Amortization of prior service cost	0
Changes in employee benefit related items	(19)
Income tax (expense)	0
Employee benefit related items, net of tax	(19)
Foreign Retirement Plans
Defined Benefit Plan Disclosure [Line Items]
Recognized actuarial gain	339
Amortization of prior service cost	0
Changes in employee benefit related items	339
Income tax (expense)	(70)
Employee benefit related items, net of tax	$ 269