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, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Retirement Benefits [Abstract]
Service cost	$ 1,503	$ 2,586	$ 2,997	$ 5,202
Interest cost	26,136	18,849	52,253	37,716
Expected return on plan assets	(41,263)	(37,646)	(82,503)	(75,318)
Amortization of prior service cost	173	172	346	344
Amortization of actuarial loss	2,340	9,275	4,681	18,554
Net periodic benefit income	$ (11,111)	$ (6,764)	$ (22,226)	$ (13,502)