Post-retirement Plan (Tables)

3 Months Ended

Mar. 31, 2018

Pension and Other Postretirement Benefits Cost (Reversal of Cost) [Abstract]

Schedule of Costs of Retirement Plans [Table Text Block]

The net periodic pension expense of these plans consisted of the following components:

	Three Months Ended March 31, 2018			February 1, 2017 to March 31, 2017
	(in thousands)
Service cost - benefit earned during the period	$	1,104		$	635
Interest cost on projected benefit obligations	562			349
Expected return on plan assets	(865		)	(511		)
Net periodic pension expense	$	801		$	473

Net Periodic Pension Expense

The net periodic benefit credit of these plans consisted of the following components:

	Three Months Ended March 31,
	2018			2017
	(In thousands)
Service cost – benefit earned during the period	$	412		$	350
Interest cost on projected benefit obligations	234			220
Amortization of prior service credit	(870		)	(870		)
Net periodic post-retirement credit	$	(224	)	$	(300	)