Pension Plans - Components of Net Periodic Pension Cost (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Retirement Benefits [Abstract]
Service cost	$ 5,418	$ 6,787
Interest cost	1,258	1,242
Expected return on plan assets	(1,493)	(1,429)
Recognized actuarial loss	13	31
Net periodic pension cost	$ 5,196	$ 6,631