PROPERTY, PLANT AND EQUIPMENT (Details) - USD ($) $ in Thousands	7 Months Ended	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2017	Dec. 31, 2016	May 31, 2015
Property, Plant and Equipment [Line Items]
Depreciation	$ 13,900	$ 35,700	$ 33,500	$ 19,000
Property, Plant and Equipment, Gross		402,742	366,198
Accumulated depreciation and amortization		(199,523)	(163,068)
Property, plant and equipment, net		203,219	203,130
Capitalized software costs, new ERP system		46,600
Capitalized interest costs, new ERP system		1,600
Amortization expense, new ERP system		2,600
Land
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross		6,698	7,429
Buildings and leasehold improvements
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross		47,924	42,257
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross		261,343	233,063
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross		9,405	8,431
Capitalized ERP system development costs
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross		46,637	44,876
Computers and computer software
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross		13,052	11,775
Automobiles
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross		5,070	5,370
Construction in progress
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross		$ 12,613	$ 12,997