FINANCIAL INSTRUMENTS - Effects of Derivative Financial Instruments, Other Comprehensive Income (Loss) and Net Income (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Revaluation of derivative financial instruments, net of reclassifications into earnings, tax expense (benefit)	$ 0	$ 400,000	$ 500,000	$ 1,100,000
Interest rate swap | Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in other comprehensive income	0	600,000	700,000		$ 1,800,000
Interest rate swap | Designated as Hedging Instrument [Member] | Interest Expense
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in net income	0	(900,000)	(1,200,000)	(2,900,000)
Interest rate swap | Derivatives not designated as hedging instruments | Miscellaneous, net
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in net income	0	0	200,000	(100,000)
Foreign exchange contracts | Derivatives not designated as hedging instruments | Foreign currency gain (loss), net
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in net income	$ 0	$ (2,400,000)	$ 200,000	$ (4,000,000)