Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2019

Compensation And Retirement Disclosure [Abstract]

Principal Components of Employee Benefit Costs

The principal components of employee benefit costs are summarized as follows:

	Year ended December 31,
	2019		2018		2017
	(in thousands)
Expense:
Savings plan	$	60,416	$	46,208	$	34,520
Funded defined benefit pension plans		—		—		162,368
Unfunded supplemental benefit plans		8,989		9,248		12,705
Other plans, net		23,917		2,794		17,595
	$	93,322	$	58,250	$	227,188

Company's Benefit Obligations and Funded Status

During 2017, the Company recognized settlement costs related to the termination of its funded defined benefit pension plans.

The following table summarizes the benefit obligations and funded status associated with the Company’s unfunded supplemental benefit plans:

	December 31,
	2019			2018
	(in thousands)
Change in projected benefit obligation:
Benefit obligation at beginning of year	$	236,773		$	258,528
Service costs		282			519
Interest costs		9,116			8,079
Actuarial losses (gains)		27,034			(16,517	)
Benefits paid		(14,412	)		(13,836	)
Projected benefit obligation at end of year		258,793			236,773
Change in plan assets:
Contributions		14,412			13,836
Benefits paid		(14,412	)		(13,836	)
Fair value of plan assets at end of year		—			—
Reconciliation of funded status:
Unfunded status of the plans	$	258,793		$	236,773
Amounts recognized in the consolidated balance sheet:
Accrued benefit liability	$	258,793		$	236,773
Amounts recognized in accumulated other comprehensive loss:
Unrecognized net actuarial loss	$	103,624		$	80,251
Unrecognized prior service credit		(4,180	)		(8,250	)
	$	99,444		$	72,001
Accumulated benefit obligation at end of year	$	258,793		$	236,773

Net Periodic Benefit Costs

Net periodic benefit costs related to the Company’s unfunded supplemental benefit and funded defined benefit pension plans included the following components:

	Year ended December 31,
	2019			2018			2017
	(in thousands)
Expense:
Service costs	$	282		$	519		$	734
Interest costs		9,116			8,079			13,261
Expected return on plan assets		—			—			(4,740	)
Amortization of net actuarial loss		3,661			4,828			17,742
Amortization of prior service credit		(4,070	)		(4,178	)		(4,312	)
Settlement costs		—			—			152,388
	$	8,989		$	9,248		$	175,073

The Weighted-Average Discount Rate Assumptions Used to Determine Net Periodic Benefit Costs and Projected Benefit Obligations

The weighted-average discount rate assumptions used to determine net periodic benefit costs for the Company’s unfunded supplemental benefits plans for the years ended December 31, 2019, 2018 and 2017, were as follows:

	Year ended December 31,
	2019			2018			2017
Discount rate for projected benefit obligation		4.32	%		3.61	%		4.03	%
Discount rate for service cost		4.55	%		3.78	%		4.32	%
Discount rate for interest cost		4.00	%		3.23	%		3.43	%

The weighted-average discount rate assumption used to determine the projected benefit obligation for the Company’s unfunded supplemental benefits plans at December 31, 2019 and 2018, was as follows:

	December 31,
	2019			2018
Discount rate		3.27	%		4.32	%

Benefit Payments

Benefit payments, which reflect expected future service, as appropriate, are expected to be made as follows:

Year	(in thousands)
2020	$	15,459
2021	$	16,225
2022	$	16,427
2023	$	16,650
2024	$	16,717
Five years thereafter	$	80,264