Workers' Compensation Expense (Tables)

12 Months Ended

Dec. 31, 2016

Workers’ compensation expense consists of the following components:



	Successor		Predecessor
	October 2 through December 31, 2016		January 1 through October 1, 2016		Year Ended December 31, 2015		Year Ended December 31, 2014
(In thousands)
Self-insured occupational disease benefits:
Service cost	$	1,583	$	3,465	$	4,282	$	1,734
Interest cost	1,126		3,184		3,944		2,914
Net amortization	—		4,325		6,973		(216		)
Total occupational disease	$	2,709	$	10,974	$	15,199	$	4,432
Traumatic injury claims and assessments	3,162		6,628		16,781		19,924
Total workers’ compensation expense	$	5,871	$	17,602	$	31,980	$	24,356

The table below reconciles changes in the occupational disease liability for the respective period.



	Successor			Predecessor
(In thousands)	October 2 through December 31, 2016			January 1 through October 1, 2016			Year Ended December 31, 2015
Beginning of period	$	119,710		$	90,836		$	72,749
Service cost	1,583			3,465			4,282
Interest cost	1,126			3,184			3,944
Curtailments	—			4,156
Actuarial (gain) loss	(9,675		)	—			14,284
Benefit and administrative payments	(1,585		)	(3,728		)	(4,423		)
Fresh start accounting adjustment	—			21,797			—
	$	111,159		$	119,710		$	90,836

The following table provides the assumptions used to determine the projected occupational disease obligation:



	Successor	Predecessor
	October 2 through December 31, 2016	January 1 through October 1, 2016	Year Ended December 31, 2015
(Percentages)
Occupational Disease Benefit
Discount rate	4.31	3.80	4.76
Cost escalation rate	N/A	N/A	N/A

Summarized below is information about the amounts recognized in the accompanying consolidated balance sheets for workers’ compensation benefits:



	Successor		Predecessor
	Year Ended December 31, 2016		Year Ended December 31, 2015
(In thousands)
Occupational disease costs	$	111,159	$	90,836
Traumatic and other workers’ compensation claims	88,593		38,309
Total obligations	199,752		129,145
Less amount included in accrued expenses	15,184		16,875
Noncurrent obligations	$	184,568	$	112,270