Employee Benefit Plans - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 843	$ 1,047
Interest cost	5,198	3,077
Expected return on plan assets	(5,080)	(4,878)
Amortization of prior service cost (credit)	37	40
Recognized actuarial gain (loss)	1,465	2,247
Net periodic benefit cost (credit)	2,463	1,533
Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Interest cost	45	22
Amortization of prior service cost (credit)	(509)	(509)
Recognized actuarial gain (loss)	(57)	(25)
Net periodic benefit cost (credit)	$ (521)	$ (512)