Retirement Plans - Net Periodic Benefit Costs and Benefit Payments (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	$ 1,208	$ 1,295
Interest cost	11,321	16,643
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2022	40,980
2023	40,973
2024	40,855
2025	40,792
2026	40,610
2027-2031	197,809
Defined Benefit Pension Plans
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	1,208	1,295	$ 1,278
Interest cost	11,321	16,643	22,376
Expected return on assets	(25,248)	(28,016)	(29,654)
Amortization of actuarial loss	10,455	10,804	10,837
Net periodic benefit cost (credit)	$ (2,264)	$ 726	$ 4,837

Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.

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Amount of benefit for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following current fiscal year.

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Amount of benefit for defined benefit plan expected to be paid in next fiscal year following current fiscal year.

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Amount of benefit for defined benefit plan expected to be paid in fifth fiscal year following current fiscal year.

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Amount of benefit for defined benefit plan expected to be paid in fourth fiscal year following current fiscal year.

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Amount of benefit for defined benefit plan expected to be paid in third fiscal year following current fiscal year.

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Amount of benefit for defined benefit plan expected to be paid in second fiscal year following current fiscal year.

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Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan.

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Amount of cost recognized for passage of time related to defined benefit plan.

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Amount of net periodic benefit cost (credit) for defined benefit plan.

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Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

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