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Retirement Benefits (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($) person	Mar. 31, 2021 USD ($)
Postemployment Benefits [Abstract]
Service cost	$ 194	$ 220
Interest cost	263	236
Expected return on plan assets	(784)	(704)
Amortization of net loss	102	314
Net Periodic Benefit (Income) Expense	$ (225)	$ 66
Number of active, vested, terminated and retired persons in the plan | person	346

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