PROPERTY, PLANT AND EQUIPMENT, NET - Summary of Property, Plant and Equipment (Details) - USD ($)	3 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property, plant and equipment
Total property, plant and equipment		$ 357,979,000	$ 504,776,000
Less: accumulated depreciation		(261,542,000)	(340,160,000)
Less: accumulated impairment		(9,521,000)	(9,521,000)
Net property, plant and equipment		86,916,000	155,095,000
Depreciation expense		29,600,000	40,100,000	$ 49,400,000
Impairment of property, plant and equipment	$ 9,500,000	0
Long-lived asset impairments	14,600,000	0	38,236,000	457,794,000
Impairment of long-lived assets to be disposed of	5,100,000
Land, buildings and improvements
Property, plant and equipment
Total property, plant and equipment		21,971,000	74,062,000
Machinery and equipment
Property, plant and equipment
Total property, plant and equipment		72,250,000	159,563,000
Leasehold improvements
Property, plant and equipment
Total property, plant and equipment		106,954,000	107,089,000
Furniture and fixtures
Property, plant and equipment
Total property, plant and equipment		101,738,000	108,196,000
Software
Property, plant and equipment
Total property, plant and equipment		54,211,000	52,970,000
Construction in progress
Property, plant and equipment
Total property, plant and equipment		$ 855,000	2,896,000
U.S. and Canada
Property, plant and equipment
Impairment of property, plant and equipment				18,600,000
Long-lived asset impairments	$ 14,600,000		$ 36,100,000	$ 412,500,000