Employee Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2016

Compensation And Retirement Disclosure [Abstract]

Summary of Components of Pension Expenses Related to Defined Benefit Plans

The following table summarizes the components of pension expense related to the Company’s defined benefit plans (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2016			2015			2016			2015
Service cost	$	4,477		$	4,251		$	8,631		$	7,865
Interest cost		931			866			1,850			1,733
Expected return on plan assets		(873	)		(861	)		(1,744	)		(1,714	)
Amortization of actuarial losses		223			232			432			455
	$	4,758		$	4,488		$	9,169		$	8,339

Summary of Severance Associated with Cost Reduction Programs

The following amounts were recorded for the severance associated with cost reduction programs (in thousands):

Balance at December 31, 2015	$	3,337
Expense, net of reversals		(472	)
Payments		(90	)
Foreign currency translation		(27	)
Balance at June 30, 2016	$	2,748