Retirement Benefit Plans - Schedule of Defined Benefit Plans Disclosures (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Change in fair value of plan assets
Fair value of plan assets at beginning of year	$ 18,269
Fair value of plan assets at end of year	18,775	$ 18,269
Pension Plan
Change in projected benefit obligation
Benefit obligation at beginning of year	17,271	22,564
Service cost	2	4
Interest cost	848	604
Liability actuarial (gain) loss	(35)	(4,761)
Benefits paid	(1,139)	(1,140)
Benefit obligation at end of year	16,947	17,271
Change in fair value of plan assets
Fair value of plan assets at beginning of year	18,269	23,671
Return on plan assets	1,645	(4,262)
Employer contributions	0	0
Benefits paid	(1,139)	(1,140)
Fair value of plan assets at end of year	18,775	18,269
Funded status	1,828	998
Supplemental Employee Retirement Plan
Change in projected benefit obligation
Benefit obligation at beginning of year	9,552	11,326
Service cost	204	284
Interest cost	470	278
Liability actuarial (gain) loss	386	(2,023)
Benefits paid	(349)	(313)
Benefit obligation at end of year	$ 10,263	$ 9,552