Retirement Benefit Plans - Schedule of Defined Benefit Plans Disclosures (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Change in fair value of plan assets
Fair value of plan assets at beginning of year	$ 22,370
Fair value of plan assets at end of year	23,671	$ 22,370
Pension Plan
Change in projected benefit obligation
Benefit obligation at beginning of year	24,100	22,449
Service cost	5	4
Interest cost	553	689
Liability actuarial (gain) loss	(994)	2,025
Benefits paid	(1,100)	(1,067)
Benefit obligation at end of year	22,564	24,100
Change in fair value of plan assets
Fair value of plan assets at beginning of year	22,370	20,605
Return on plan assets	2,401	2,832
Employer contributions	0	0
Benefits paid	(1,100)	(1,067)
Fair value of plan assets at end of year	23,671	22,370
Funded status	1,107	(1,730)
Supplemental Employee Retirement Plan
Change in projected benefit obligation
Benefit obligation at beginning of year	10,160	9,022
Service cost	369	305
Interest cost	205	236
Liability actuarial (gain) loss	759	1,168
Benefits paid	(167)	(1,025)
Plan amendments	0	454
Benefit obligation at end of year	$ 11,326	$ 10,160