Defined benefit pension obligation (Tables)

9 Months Ended

Sep. 30, 2017

Defined benefit pension obligation

Schedule of net periodic benefit cost

The net periodic benefit cost was as follows (in thousands):

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2017		2016		2017		2016
Service cost	$	760	$	365	$	2,056	$	503
Interest cost		57		29		155		39
Expected return on plan assets		(43)		(23)		(116)		(31)
Amortization of prior service cost		12		—		37		—
Amortization of actuarial losses		34		—		102		—
Net periodic benefit cost	$	820	$	371	$	2,234	$	511