Defined Benefit Plans (Tables)

6 Months Ended

Jun. 30, 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 June 30,						Six Months Ended June 30,
	2017			2016			2017			2016
Service cost	$	245		$	297		$	486		$	587
Interest cost	57			62			114			123
Expected return on plan assets	(252		)	(298		)	(499		)	(589		)
Prior service cost amortization	39			38			75			75
Deferred loss amortization	—			62			—			122
Net periodic pension cost	$	89		$	161		$	176		$	318

Net cost related to employee severance

Components of net cost related to the employee severance plan are as follows (in thousands):

	Three and Six Months Ended June 30, 2017
Service cost	$	88
Interest cost	13
Net cost	$	101