Defined Benefit Plan (Tables)

3 Months Ended

Mar. 31, 2017

Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]

Schedule of components of net periodic pension cost (benefit)

Components of net periodic pension cost are as follows (in thousands):

	Three Months Ended March 31,
	2017			2016
Service cost	$	241		$	290
Interest cost	56			61
Expected return on plan assets	(247		)	(291		)
Prior service cost amortization	36			37
Deferred loss amortization	—			60
Net periodic pension cost	$	86		$	157