Qualified Employee Benefit Plans - Amounts Recognized in Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Reclassification adjustment for (losses) included in net income upon retirement plan liquidation	$ (22,830)	$ (4,931)	$ 0
Changes in employee benefit related items	23,441	6,459	9,159
Income tax (expense)	(130)	(89)	(79)
Employee benefit related items, net of tax	23,311	6,370	9,080
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	0	5,534	8,815
Prior service cost	611	24	24
Reclassification adjustment for (losses) included in net income upon retirement plan liquidation	(22,898)	0	0
Changes in employee benefit related items	23,509	5,558	8,839
Income tax (expense)	(147)	(20)	(9)
Employee benefit related items, net of tax	$ 23,362	$ 5,538	$ 8,830