ASSETS HELD FOR SALE (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Oct. 03, 2020	Oct. 03, 2020	Sep. 28, 2019	Dec. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets held for sale, carrying value, current	$ 5,087	$ 5,087		$ 1,750
Real property assets, held-for-sale	800	800
Net book value of property, plant and equipment held-for-sale	635,904	635,904		$ 652,841
Assets held-for-sale, fair value	800	800
Proceeds from sale of property, plant and equipment		1,538	$ 873
Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net loss on sale of real property assets	400	400
Proceeds from sale of property, plant and equipment	1,800	1,800
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Commercial
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets held for sale, carrying value, current	$ 4,300	$ 4,300