Pension and Other Postretirement Benefits (Tables)

3 Months Ended

Mar. 31, 2020

Retirement Benefits [Abstract]

Schedule of Net Benefit Costs

Pension and other postretirement benefits expenses consisted of the following:

	Three Months Ended March 31,
Pensions	2020			2019
Service cost	$	1,649		$	1,433
Interest cost	3,817			4,536
Expected return on plan assets	(7,393		)	(7,078		)
Amortization of prior service cost	80			103
Amortization of actuarial losses	3,339			2,158
Net periodic benefit cost	$	1,492		$	1,152

	Three Months Ended March 31,
Other Postretirement Benefits	2020		2019
Service cost	$	22	$	19
Interest cost	264		340
Amortization of prior service cost	7		6
Amortization of actuarial losses	23		10
Net periodic benefit cost	$	316	$	375