Retirement Benefit Plans - Schedule of Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 4	$ 5
Interest cost	604	553
Expected return on plan assets	(1,384)	(1,581)
Amortization of net (gain)/loss	182	542
Net periodic benefit cost	(594)	(481)
Supplemental Employee Retirement Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	284	369
Interest cost	278	205
Amortization of prior service cost	420	413
Amortization of net (gain)/loss	440	318
Net periodic benefit cost	$ 1,422	$ 1,305