FAIR VALUE MEASUREMENTS - Measured on Recurring Basis (Detail) - Recurring - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Contingent Consideration
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net liabilities	$ 429	$ 1,712	[1]
Derivative | Net investment hedge
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net liabilities	(3,904)	(3,246)
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	[1]
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	[1]
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	(3,904)	(3,246)
Significant Unobservable Inputs (Level 3) | Contingent Consideration
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net liabilities	429	1,712	[1]
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	0	20,594	[2]
Convertible debt embedded derivative | Quoted Prices in Active Markets for Identical Items (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net liabilities	0	0	[2]
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	0	20,594	[2]
Convertible debt embedded derivative | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net liabilities	$ 0	$ 0	[2]

[1] Inclusive of both current and noncurrent portions.

[2] The embedded derivative liability was reclassified to stockholders’ equity as of May 17, 2018 and is no longer marked to fair value each period, as discussed in Note 10.