Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2018

Compensation and Retirement Disclosure [Abstract]

Schedule of Net Benefit Costs

Components of the net periodic pension and postretirement benefit cost are as follows:

	Successor			Predecessor
	Three Months Ended March 31, 2018			Three Months Ended March 31, 2017
Service cost	$	117		$	106
Interest cost	1,225			1,210
Expected return on assets	(1,971		)	(2,034		)
Amortization of prior service cost	—			50
Amortization of actuarial loss	—			164
Net periodic pension and postretirement benefit gain	$	(629	)	$	(504	)
Contributions paid	$	—		$	356