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Retirement Plans (Tables)

12 Months Ended

Dec. 31, 2020

Compensation And Retirement Disclosure [Abstract]

Schedule of Benefit Obligations in Excess of Fair Value of Plan Assets

The majority of the Company's defined benefit pension plans have projected benefit obligations in excess of the fair value of plan assets. For these plans, the projected benefit obligations and the fair value of plan assets were as follows as of December 31, 2020 and 2019:

December 31,		2020				2019
		(In thousands)
Projected benefit obligations		$	494,273			$	486,305
Fair value of plans' assets			437,234				417,074

Schedule Of Fair Value Of Plan Assets In Excess Of Benefit Obligations Table Text Block

Certain of the Company's U.K. Plans have fair values of plan assets that exceed the projected benefit obligations. For these plans, the projected benefit obligations and the fair value of plan assets were as follows as of December 31, 2020 and 2019:

December 31,		2020				2019
		(In thousands)
Projected benefit obligations		$	267,200			$	261,953
Fair value of plans' assets			303,957				296,943

Schedule of Accumulated Benefit Obligations in Excess of Fair Value of Plan Assets

A reconciliation of the beginning and ending balances of the projected benefit obligations and the fair value of plans' assets for the Company's defined benefit pension plans as of the plans' most recent measurement dates is as follows:

Year Ended December 31,		2020				2019
		(In thousands)
Projected Benefit Obligations:
Beginning of measurement period		$	748,258			$	694,482
Service cost			1,295				1,278
Interest cost			16,643				22,408
Employee contributions			35				45
Actuarial loss (gain)			49,938				77,549
Plan settlements			(1,450	)			—
Benefits paid			(55,150	)			(50,415	)
Foreign currency effects			1,904				2,911
End of measurement period			761,473				748,258
Fair Value of Plans' Assets:
Beginning of measurement period			714,017				649,688
Actual return on plans' assets			71,446				109,670
Employer contributions			10,446				1,112
Employee contributions			35				522
Plan settlements			(1,450	)			—
Benefits paid			(55,150	)			(50,415	)
Foreign currency effects			1,847				3,440
End of measurement period			741,191				714,017
Unfunded Status		$	(20,282	)		$	(34,241	)

Schedule of Net Funded Status

The underfunded status of the Company's defined benefit pension plans recognized in the Consolidated Balance Sheets at December 31 consisted of:

December 31,		2020				2019
		(In thousands)
U.S. Qualified Plan		$	51,645			$	63,538
Other international plans			2,241				2,371
Subtotal, included in "Accrued pension liabilities"			53,886				65,909
U.K. prepaid pension asset included in "Other noncurrent assets"			(36,757	)			(34,990	)
Unfunded status of nonqualified defined benefit deferred pension plans included in "Other accrued liabilities"			316				310
Unfunded status of nonqualified defined benefit pension plans included in "Other noncurrent liabilities"			2,837				3,012
Total unfunded status		$	20,282			$	34,241
Accumulated other comprehensive loss, before income taxes		$	(264,244	)		$	(268,275	)

Schedule of Net Unrecognized Actuarial Gain (loss)

The following tables set forth the 2020 and 2019 changes in accumulated other comprehensive loss for the Company's defined benefit retirement plans and post-retirement medical benefits plan on a combined basis:

		Defined Benefit Pension Plans				Post-Retirement Medical Benefits Plan
		(In thousands)
Net unrecognized actuarial (loss) gain, December 31, 2018		$	(280,948	)		$	304
Amortization of net loss (gain)			10,836				(152	)
Net gain arising during the year			2,311				—
Currency translation			(626	)			—
Net unrecognized actuarial (loss) gain, December 31, 2019			(268,427	)			152
Amortization of net loss (gain)			10,804				(152	)
Net loss arising during the year			(6,510	)			—
Currency translation			(111	)			—
Net unrecognized actuarial loss, December 31, 2020		$	(264,244	)		$	—

Schedule of Expected Benefit Payments

Net periodic benefit cost related to all of the Company's defined benefit pension plans recognized in the Company's Consolidated Statements of Operations for the years ended December 31, 2020, 2019, and 2018 included the following components:

Year Ended December 31,		2020				2019				2018
		(In thousands)
Service cost		$	1,295			$	1,278			$	1,395
Interest cost			16,643				22,376				20,933
Expected return on assets			(28,016	)			(29,654	)			(34,267	)
Amortization of actuarial loss			10,804				10,837				10,744
Net periodic benefit cost (credit)		$	726			$	4,837			$	(1,195	)

Over the next ten years, the following benefit payments are expected to be required to be made from the Company's U.S. and U.K. defined benefit pension plans:

Year Ending December 31,		Expected Benefit Payments
		(In thousands)
2021		$	42,436
2022			42,590
2023			42,611
2024			42,440
2025			42,329
2026-2030			206,549

Schedule of Assumptions Used

Certain assumptions used in computing the benefit obligations and net periodic benefit cost for the U.S. and U.K. defined benefit pension plans were as follows:

U.S. Qualified Plan:		2020				2019
Discount rate used to compute benefit obligations			2.38	%			3.15	%
Discount rate used to compute periodic benefit cost			3.15	%			4.31	%
Expected long-term rates of return on plans' assets			4.70	%			6.10	%

U.K. Defined Benefit Plans:		2020				2019
Discount rate used to compute benefit obligations			1.60	%			1.93	%
Discount rate used to compute periodic benefit cost			1.93	%			2.77	%
Expected long-term rates of return on plans' assets			2.54	%			3.28	%

Schedule of Allocation of Plan Assets

Asset allocations at the respective measurement dates, by asset category, for the Company's U.S. and U.K. qualified defined benefit pension plans were as follows:

		U.S. Qualified Plan								U.K. Plans
December 31,		2020				2019				2020				2019
Equity securities			23.4	%			21.4	%			17.1	%			17.9	%
Fixed income securities			67.2	%			69.3	%			67.4	%			68.3	%
Alternative strategies			6.2	%			5.9	%			14.7	%			13.0	%
Cash, cash equivalents and short-term investment funds			3.1	%			3.4	%			0.9	%			0.8	%
Total asset allocation			100.0	%			100.0	%			100.0	%			100.0	%

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