Employee Benefits - Summary of Components of Net Pension Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Components of net periodic benefit cost:
Service cost	$ 8,092	$ 7,896
Interest cost	2,430	1,269
Expected return on plan assets	(9,281)	(8,141)
Past service credit	(2,970)	(2,946)
Recognized net actuarial loss	2,798	3,538
Net periodic benefit cost	$ 1,069	$ 1,616