Post-retirement Plan (Tables)

9 Months Ended

Sep. 30, 2017

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

Changes in Projected Benefit Obligations, Fair Value of Plan Assets, and Funded Status of Plan [Table Text Block]

Our purchase price allocation as of February 1, 2017 included estimates of the amount of pension benefit obligation and the pension assets to be transferred based on actuarial estimates and are as follows:

	February 1, 2017
	(in thousands)
Projected benefit obligation	$	52,851
Estimated pension assets	54,156
Estimated funded status	$	1,305

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 September 30, 2017			February 1, 2017 to September 30, 2017
	(in thousands)
Service cost - benefit earned during the period	$	1,013		$	2,596
Interest cost on projected benefit obligations	556			1,424
Expected return on plan assets	(802		)	(2,053		)
Net periodic pension expense	$	767		$	1,967

Net Periodic Pension Expense

The net periodic benefit credit of this plan consisted of the following components:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2017			2016			2017			2016
	(In thousands)
Service cost – benefit earned during the period	$	300		$	324		$	901		$	972
Interest cost on projected benefit obligations	170			197			509			591
Amortization of prior service credit	(870		)	(871		)	(2,610		)	(2,613		)
Net periodic post-retirement credit	$	(400	)	$	(350	)	$	(1,200	)	$	(1,050	)