Benefit Plans - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Components of Net Periodic Benefit Cost
Service cost	$ 280	$ 351	$ 1,404
Interest cost	240	319	$ 1,274
Net loss	108	197
Net periodic pension cost	$ 628	$ 867