Employee Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2018

Retirement Benefits [Abstract]

Components of Net Periodic Benefit Cost

The following table presents the components of net periodic benefit cost (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Service cost	$	338	$	80	$	676	$	160
Interest cost	117		135		234		269
Net periodic benefit cost	$	455	$	215	$	910	$	429