Retirement Plans (Tables)

12 Months Ended

Dec. 31, 2019

Retirement Benefits [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, 2019 and 2018:

December 31,	2019		2018
	(In thousands)
Projected benefit obligations	$	486,305	$	459,706
Fair value of plans' assets	417,074		382,181

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

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, 2019 and 2018:

December 31,	2019		2018
	(In thousands)
Projected benefit obligations	$	261,953	$	234,776
Fair value of plans' assets	296,943		267,508

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,	2019			2018
	(In thousands)
Projected Benefit Obligations:
Beginning of measurement period	$	694,482		$	764,740
Service cost	1,278			1,395
Interest cost	22,408			20,933
Employee contributions	45			59
Actuarial loss (gain)	77,549			(24,277		)
Plan settlements	—			(1,014		)
Plan amendments	—			1,542
Benefits paid	(50,415		)	(58,592		)
Foreign currency effects	2,911			(10,304		)
End of measurement period	748,258			694,482
Fair Value of Plans' Assets:
Beginning of measurement period	649,688			708,895
Actual return on plans' assets	109,670			(13,017		)
Employer contributions	1,112			24,862
Employee contributions	522			59
Plan settlements	—			(1,014		)
Benefits paid	(50,415		)	(58,592		)
Foreign currency effects	3,440			(11,505		)
End of measurement period	714,017			649,688
Unfunded Status	$	(34,241	)	$	(44,794	)

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,	2019			2018
	(In thousands)
U.S. Qualified Plan	$	63,538		$	72,484
Other international plans	2,371			1,839
Subtotal, included in "Accrued pension liabilities"	65,909			74,323
U.K. prepaid pension asset included in "Other noncurrent assets"	(34,990		)	(32,732		)
Unfunded status of nonqualified defined benefit deferred pension plans included in "Other accrued liabilities"	310			312
Unfunded status of nonqualified defined benefit pension plans included in "Other noncurrent liabilities"	3,012			2,891
Total unfunded status	$	34,241		$	44,794
Accumulated other comprehensive loss, before income taxes	$	(268,275	)	$	(280,644	)

Schedule of Net Unrecognized Actuarial Gain (loss)

The following tables set forth the 2019 and 2018 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, 2017	$	(268,515	)	$	456
Amortization of net loss (gain)	10,914			(152		)
Net loss arising during the year	(24,709		)	—
Currency translation	1,362			—
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

Schedule of Net Periodic Benefit Costs

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, 2019, 2018, and 2017 included the following components:

Year Ended December 31,	2019			2018			2017
	(In thousands)
Service cost	$	1,278		$	1,395		$	1,288
Interest cost	22,376			20,933			22,723
Expected return on assets	(29,654		)	(34,267		)	(34,056		)
Amortization of actuarial loss	10,837			10,744			11,154
Net periodic benefit cost (credit)	$	4,837		$	(1,195	)	$	1,109

Schedule of Expected Benefit Payments

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)
2020	$	43,637
2021	43,835
2022	43,942
2023	43,921
2024	43,691
2025-2029	213,641

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:	2019		2018
Discount rate used to compute benefit obligations	3.15	%	4.30	%
Discount rate used to compute periodic benefit cost	4.31	%	3.63	%
Expected long-term rates of return on plans' assets	6.10	%	6.20	%

U.K. Defined Benefit Plans:	2019		2018
Discount rate used to compute benefit obligations	1.93	%	2.77	%
Discount rate used to compute periodic benefit cost	2.77	%	2.61	%
Expected long-term rates of return on plans' assets	3.28	%	3.98	%

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,	2019		2018		2019		2018
Equity securities	21.4	%	21.8	%	17.9	%	18.0	%
Fixed income securities	69.3	%	68.8	%	68.3	%	71.8	%
Alternative strategies	5.9	%	7.3	%	13.0	%	9.0	%
Cash, cash equivalents and short-term investment funds	3.4	%	2.1	%	0.8	%	1.2	%
Total asset allocation	100.0	%	100.0	%	100.0	%	100.0	%