DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES - Balance Sheet Location (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Derivatives, Fair Value [Line Items]
Fair value, derivative asset	$ 13,484	$ 8,057
Fair value, derivative liability	(27,750)	(64,633)
Other current assets
Derivatives, Fair Value [Line Items]
Fair value, derivative asset	3,452	6,494
Other assets
Derivatives, Fair Value [Line Items]
Fair value, derivative asset	10,032	1,563
Other current liabilities
Derivatives, Fair Value [Line Items]
Fair value, derivative liability	(760)	(11)
Other non-current liabilities
Derivatives, Fair Value [Line Items]
Fair value, derivative liability	(26,990)	(64,622)
Derivatives designated as cash flow hedges | Derivatives designated as cash flow hedges | Foreign currency exchange contracts | Other current assets
Derivatives, Fair Value [Line Items]
Fair value, derivative asset	3,096	4,968
Derivatives designated as cash flow hedges | Derivatives designated as cash flow hedges | Foreign currency exchange contracts | Other assets
Derivatives, Fair Value [Line Items]
Fair value, derivative asset	32	1,050
Derivatives designated as cash flow hedges | Derivatives designated as cash flow hedges | Foreign currency exchange contracts | Other current liabilities
Derivatives, Fair Value [Line Items]
Fair value, derivative liability	(760)	0
Derivatives designated as cash flow hedges | Derivatives designated as cash flow hedges | Foreign currency exchange contracts | Other non-current liabilities
Derivatives, Fair Value [Line Items]
Fair value, derivative liability	(98)	0
Derivatives designated as cash flow hedges | Derivatives designated as cash flow hedges | Foreign currency option contracts | Other current assets
Derivatives, Fair Value [Line Items]
Fair value, derivative asset	356	1,526
Derivatives designated as cash flow hedges | Derivatives designated as cash flow hedges | Foreign currency option contracts | Other current liabilities
Derivatives, Fair Value [Line Items]
Fair value, derivative liability	0	(11)
Derivatives designated as cash flow hedges | Derivatives designated as cash flow hedges | Interest rate swaps | Other non-current liabilities
Derivatives, Fair Value [Line Items]
Fair value, derivative liability	(26,892)	(51,580)
Derivatives designated as cash flow hedges | Derivatives designated as cash flow hedges | Forward-starting interest rate swaps | Other assets
Derivatives, Fair Value [Line Items]
Fair value, derivative asset	10,000	513
Derivatives designated as cash flow hedges | Derivatives designated as cash flow hedges | Forward-starting interest rate swaps | Other non-current liabilities
Derivatives, Fair Value [Line Items]
Fair value, derivative liability	$ 0	$ (13,042)