5. Employee Benefit Plan (Tables)

9 Months Ended

Sep. 30, 2018

Employee Benefit Plan Tables Abstract

Schedule of employee benefit plan

	Nine Months Ended						Three Months Ended
	September 30, 2018			September 30, 2017			September 30, 2018			September 30, 2017
Service cost	$	576		$	522		$	192		$	174
Interest cost		372			365			124			122
Expected return on plan assets		(693	)		(638	)		(231	)		(213	)
Amortization of prior service cost		(12	)		(11	)		(4	)		(4	)
Amortization of net loss		228			213			76			71
Net periodic pension cost	$	471		$	450		$	157		$	150