Qualified Employee Benefit Plans - Amounts Recognized in Other Comprehensive (Loss) Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Changes in employee benefit related items	$ 6,459	$ 9,159	$ 6,946
Income tax (expense)	(89)	(79)	(95)
Employee benefit related items, net of tax	6,370	9,080	6,851
Retirement Plan
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Unrecognized net gain from experience different from that assumed and effects of changes and assumptions	5,534	8,815	6,519
Prior service cost	24	24	24
Changes in employee benefit related items	5,558	8,839	6,543
Income tax (expense)	(20)	(9)	(33)
Employee benefit related items, net of tax	$ 5,538	$ 8,830	$ 6,510