Employee Benefits - Summary of Components of Net Pension Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Components of net periodic benefit cost:
Service cost	$ 8,092	$ 7,898	$ 16,184	$ 15,794
Interest cost	2,430	1,267	4,860	2,536
Expected return on plan assets	(9,281)	(8,141)	(18,562)	(16,283)
Past service cost	(2,970)	(2,945)	(5,940)	(5,890)
Recognized net actuarial loss	2,798	3,538	5,596	7,075
Net periodic benefit cost	$ 1,069	$ 1,617	$ 2,138	$ 3,232