DISCONTINUED OPERATIONS AND ASSETS HELD FOR SALE - Narrative (Details) $ in Thousands, £ in Millions	1 Months Ended				3 Months Ended			9 Months Ended		12 Months Ended
	Jul. 31, 2015 USD ($)	May 31, 2015 USD ($)	Jan. 31, 2015 USD ($)	Jan. 31, 2015 GBP (£)	Sep. 30, 2016 USD ($)	Oct. 29, 2015 facility	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Dec. 31, 2015 USD ($) facility
Income Statement Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Businesses sold, number of facilities | facility										5
Proceeds from sale of businesses								$ 1,027	$ 36,941	$ 31,000
Pre-tax gains (losses)										(17,000)
Impairment of assets held for sale							$ 41,000	0	40,813
Gain (loss) on sale of business								845	(15,759)
Net tax expense (benefit)							2,980		2,980	$ 3,000
Net sales					$ 0		700	0	58,000
Loss from discontinued operations, net of taxes					$ 0		(4,258)	$ 0	$ (45,874)
Surface Technology Treatment Facilities [Member]
Income Statement Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Businesses sold, number of facilities | facility						2
Engineered Packaging [Member]
Income Statement Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Proceeds from sale of businesses	$ 14,000
Pre-tax gains (losses)	$ 2,300
Downstream [Member]
Income Statement Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Proceeds from sale of businesses		$ 19,000
Impairment of assets held for sale							$ 40,000
Aviation Ground Support [Member]
Income Statement Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Proceeds from sale of businesses			$ 4,000	£ 3