Post-retirement Plan (Tables)

6 Months Ended

Jun. 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	$	50,827
Estimated pension assets	52,082
Estimated funded status	$	1,255

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 June 30, 2017			February 1, 2017 to June 30, 2017
	(in thousands)
Service cost - benefit earned during the period	$	944		$	1,582
Interest cost on projected benefit obligations	518			868
Expected return on plan assets	(747		)	(1,252		)
Net periodic pension expense	$	715		$	1,198

Net Periodic Pension Expense

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

	Three Months Ended June 30,						Six Months Ended June 30,
	2017			2016			2017			2016
	(In thousands)
Service cost – benefit earned during the period	$	301		$	324		$	601		$	648
Interest cost on projected benefit obligations	169			197			339			394
Amortization of prior service credit	(870		)	(871		)	(1,740		)	(1,742		)
Net periodic post-retirement credit	$	(400	)	$	(350	)	$	(800	)	$	(700	)