Pensions and Other Postretirement Benefits

9 Months Ended

Sep. 30, 2016

Compensation and Retirement Disclosure [Abstract]

Pensions and Other Postretirement Benefits

Defined Benefit Plan

We provide a non-contributory defined benefit pension plan for substantially all of our Dutch employees ("Dutch Plan") who were hired prior to 2007. The pension benefit is based on years of service and final pay or career average pay, depending on when the employee began participating. The benefits earned by the employees are immediately vested.

The following table summarizes the components of net periodic pension cost under the Dutch Plan for the three and nine months ended September 30, 2016 and 2015 (in thousands):

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2016			2015			2016			2015
Service cost	$	364		$	453		$	1,097		$	1,356
Interest cost	332			301			1,001			904
Expected return on plan assets	(279		)	(249		)	(841		)	(748		)
Amortization of transition asset	—			(22		)	—			(66		)
Amortization of prior service cost	(20		)	(21		)	(58		)	(59		)
Amortization of actuarial loss	148			181			444			548
Net periodic pension cost	$	545		$	643		$	1,643		$	1,935

During the nine months ended September 30, 2016, we contributed $1.1 million to fund the estimated 2016 premiums on investment contracts held by the Dutch Plan.