Defined Benefit Pension Plan and Postretirement Benefits (Tables)

12 Months Ended

Dec. 31, 2020

Compensation And Retirement Disclosure [Abstract]

Reconciliation of the Change in the Benefit Obligation

The following table provides a reconciliation of the change in the benefit obligation, based on the benefits to which the employees are entitled at the expected date of separation, for the Pension Plans and the net amount recognized in the accompanying Consolidated Balance Sheets (in thousands):

	December 31,
	2020			2019
Balance at the beginning of the period	$	3,933		$	3,282
Service cost		446			405
Interest cost		214			254
Actuarial (gains) losses (1)		1,914			(108	)
Benefits paid		(235	)		(22	)
Effect of foreign currency translation		227			122
Balance at the end of the period	$	6,499		$	3,933
Unfunded status	$	(6,499	)	$	(3,933	)
Net amount recognized	$	(6,499	)	$	(3,933	)
Amounts recognized in the balance sheet:
Other accrued expenses and current liabilities	$	310		$	—
Other long-term liabilities		6,189			3,933
	$	6,499		$	3,933

(1) The actuarial loss for 2020 was primarily due to a reduction in the discount rate and attrition rate from the rates that were used in the preceding year.

Benefit Obligations and Net Periodic Benefit Cost for the Pension Plans

The actuarial assumptions used to determine the benefit obligations and net periodic benefit cost for the Pension Plans were as follows:

	Years Ended December 31,
	2020	2019			2018
Discount rate	3.6-3.9%	5.0-5.3%			7.4-7.5%
Rate of compensation increase	1.4-1.6%		1.4	%		2.0	%

Net Periodic Benefit Cost and Other Accumulated Comprehensive Income for Pension Plans

The following table provides information about the net periodic benefit cost and other accumulated comprehensive income for the Pension Plans (in thousands):

	Years Ended December 31,
	2020			2019			2018
Service cost (1)	$	446		$	405		$	448
Interest cost (2)		214			254			196
Recognized actuarial (gains) (2)		(95	)		(86	)		(58	)
Net periodic benefit cost		565			573			586
Unrealized net actuarial (gains), net of tax		(596	)		(2,324	)		(2,256	)
Total amount recognized in net periodic benefit cost and    accumulated other comprehensive income (loss)	$	(31	)	$	(1,751	)	$	(1,670	)

(1) Included in “Direct salaries and related costs” and “General and administrative” costs in the accompanying Consolidated Statements of Operations.

(2) Included in “Other income (expense), net” in the accompanying Consolidated Statements of Operations.

Estimated Future Benefit Payments for Expected Future Service

The estimated future benefit payments, which reflect expected future service, as appropriate, are as follows (in thousands):

Years Ending December 31,	Amount
2021	$	310
2022		67
2023		138
2024		153
2025		129
2026 - 2030		1,591

Company's Contributions to Employee Retirement Savings Plans

The Company’s contributions included in the accompanying Consolidated Statements of Operations were as follows (in thousands):

	Years Ended December 31,
	2020		2019		2018
401(k) plan contributions	$	2,969	$	1,714	$	1,612