FAIR VALUE MEASUREMENTS - Measured on Recurring Basis (Detail) - Recurring - USD ($) $ in Thousands		Dec. 31, 2017	Dec. 31, 2016
Contingent Consideration
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net liabilities	[1]	$ 1,712	$ 3,739
Derivative | Net investment hedge
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net liabilities		(3,246)	(5,048)
Quoted Prices in Active Markets for Identical Items (Level 1) | Contingent Consideration
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net liabilities		0	0
Quoted Prices in Active Markets for Identical Items (Level 1) | Derivative | Net investment hedge
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net liabilities		0	0
Significant Other Observable Inputs (Level 2) | Contingent Consideration
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net liabilities		0	0
Significant Other Observable Inputs (Level 2) | Derivative | Net investment hedge
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net liabilities		(3,246)	(5,048)
Significant Unobservable Inputs (Level 3) | Contingent Consideration
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net liabilities	[1]	1,712	3,739
Significant Unobservable Inputs (Level 3) | Derivative | Net investment hedge
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net liabilities		0	$ 0
Convertible debt embedded derivative
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net liabilities		20,594
Convertible debt embedded derivative | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net liabilities		$ 20,594

[1] Inclusive of both current and noncurrent portions.