Employee Benefit Plans - Components of Net Periodic Benefit Income for the Pension Plans (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Retirement Benefits [Abstract]
Service cost	$ 2,586	$ 3,101	$ 5,202	$ 6,142
Interest cost	18,849	17,962	37,716	35,868
Expected return on plan assets	(37,646)	(38,858)	(75,318)	(77,590)
Amortization of prior service cost	172	172	344	344
Amortization of actuarial loss	9,275	12,509	18,554	24,965
Net periodic benefit income	$ (6,764)	$ (5,114)	$ (13,502)	$ (10,271)