Employee Retirement Plans (Tables)

3 Months Ended

Mar. 31, 2020

Pension plan

Employee retirement plans

Schedule of components of net periodic pension or other postretirement benefit cost

	March 31,
	2019
Component of net periodic pension cost:
Service cost	$	-
Interest cost		410
Expected return on plan assets		(294)
Amortization of net loss		149
Net periodic pension cost	$	265

Other postretirement benefit cost

Employee retirement plans

Schedule of components of net periodic pension or other postretirement benefit cost

	Three Months Ended
	March 31,		March 31,
	2020		2019
Component of periodic other postretirement benefit cost:
Service cost	$	37	$	37
Interest cost		47		63
Amortization of net gain		(77)		(78)
Net periodic other postretirement benefit cost	$	7	$	22