Employee Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2017

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

Pension Benefit Costs

The following table details the components of pension benefit costs (credits):

	Successor			Predecessor			Successor			Predecessor
	Three Months Ended June 30, 2017			Three Months Ended June 30, 2016			Six Months Ended June 30, 2017			Six Months Ended June 30, 2016
(In thousands)
Interest cost	$	2,991		$	3,197		$	5,982		$	6,535
Expected return on plan assets	(4,499		)	(4,444		)	(8,996		)	(8,982		)
Pension settlement	(487		)	454			(487		)	454
Amortization of other actuarial losses	—			924			—			1,681
Net benefit cost (credit)	$	(1,995	)	$	131		$	(3,501	)	$	(312	)

The following table details the components of other postretirement benefit costs (credits):

	Successor		Predecessor			Successor		Predecessor
	Three Months Ended June 30, 2017		Three Months Ended June 30, 2016			Six Months Ended June 30, 2017		Six Months Ended June 30, 2016
(In thousands)
Service cost	$	171	$	105		$	341	$	265
Interest cost	1,059		1,138			2,117		2,272
Curtailments	—		(970		)	—		(970		)
Amortization of prior service credits	—		(2,672		)	—		(5,345		)
Amortization of other actuarial losses (gains)	—		(566		)	—		(1,132		)
Net benefit cost (credit)	$	1,230	$	(2,965	)	$	2,458	$	(4,910	)