Pension and Other Post Retirement Benefit Plans - Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Retirement Benefits [Abstract]
Net periodic pension benefit cost	$ (2,094)	$ (1,419)	$ (909)
Net gain (loss)	9,460	(3,119)	4,552
Amortization of net loss	305	221	404
Amortization of prior service cost	87	87	87
Total recognized in other comprehensive income (loss)	9,852	(2,811)	5,043
Total recognized in net periodic pension benefit cost and other comprehensive income (loss)	$ 11,946	$ (1,392)	$ 5,952