ASSETS AND LIABILITIES HELD FOR SALE (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 29, 2019	Sep. 30, 2018	Sep. 29, 2019	Sep. 30, 2018	Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Property, plant and equipment, net	$ 20,905,000		$ 20,905,000
Other assets	2,434,000		2,434,000
Assets	23,339,000		23,339,000		$ 23,421,000
Accounts payable and accrued liabilities	376,000		376,000
Liabilities	376,000		376,000		$ 596,000
Proceeds from Sale of Intangible Assets				$ 13,000,000
Gain on sale of licensing rights				2,658,000
Proceeds from sales of property, plant and equipment and other long-lived assets			228,000	46,652,000
Business realignment costs	(1,606,000)	$ (11,423,000)	(8,468,000)	(42,670,000)
Proceeds from Divestiture of Businesses			0	171,950,000
Long-lived asset impairment charges	0	1,649,000	4,741,000	28,817,000
Operational Optimization Program
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Business realignment costs		(1,077,000)		(2,813,000)
Facility Closing | Operational Optimization Program
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sales of property, plant and equipment and other long-lived assets			27,468,000
Business realignment costs	$ 0	$ 6,562,000	$ 0	$ 6,562,000