Restructuring Activity - Restructuring and Related Costs (Details) - USD ($)	4 Months Ended	8 Months Ended	12 Months Ended
	Dec. 31, 2017	Aug. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net	$ 0
Employee termination and related benefits
Restructuring Cost and Reserve [Line Items]
Multiemployer plans, withdrawal obligation				$ 5,500,000
Restructuring expense, net	0
Lease termination costs
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net	0
Moving costs associated with plant consolidations
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net	0
Professional fees
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net	0
Loss on disposal of fixed assets
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net	$ 0
Predecessor
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net		$ 566,000	$ 12,942,000
Predecessor | Employee termination and related benefits
Restructuring Cost and Reserve [Line Items]
Multiemployer plans, withdrawal obligation			3,527,000	$ 5,500,000
Restructuring expense, net		185,000	(854,000)
Predecessor | Lease termination costs
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net		0	6,038,000
Predecessor | Moving costs associated with plant consolidations
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net		305,000	4,558,000
Predecessor | Professional fees
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net		76,000	1,839,000
Predecessor | Loss on disposal of fixed assets
Restructuring Cost and Reserve [Line Items]
Restructuring expense, net		$ 0	$ 1,361,000