Workers' Compensation Expense (Tables)

9 Months Ended

Sep. 30, 2017

Compensation Related Costs [Abstract]

Workers' compensation expense

Workers’ compensation expense consists of the following components:

	Successor			Predecessor		Successor			Predecessor
	Three Months Ended September 30, 2017			Three Months Ended September 30, 2016		Nine Months Ended September 30, 2017			Nine Months Ended September 30, 2016
(In thousands)
Self-insured occupational disease benefits:
Service cost	$	1,558		$	1,051	$	4,675		$	3,466
Interest cost	1,169			1,098		3,506			3,184
Net amortization	—			2,178		—			4,325
Curtailments	$	(4,660	)	$	—	$	(4,660	)	$	4,156
Total occupational disease	$	(1,933	)	$	4,327	$	3,521		$	15,131
Traumatic injury claims and assessments	3,077			2,415		8,487			6,628
Total workers’ compensation expense	$	1,144		$	6,742	$	12,008		$	21,759