Retirement Benefit Plans - Summary of Components of Accumulated Other Comprehensive Loss Related to Pensions and Postretirement Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Pension
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	$ 56,717	$ 41,792
Deferred tax benefit (expense)	15,383	8,636
Net amount recorded in (AOCL) AOCI	41,334	33,156
SERP
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	50	658
Deferred tax benefit (expense)	14	136
Net amount recorded in (AOCL) AOCI	36	522
OPEB
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	(5,573)	(620)
Deferred tax benefit (expense)	(1,512)	(128)
Net amount recorded in (AOCL) AOCI	$ (4,061)	$ (492)