LONG-TERM DEBT, DERIVATIVES AND LETTERS OF CREDIT - Amounts Recognized in Other Comprehensive Income (Loss), and Reclassified Into Income (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Other Comprehensive Income (Loss)		$ 658	$ (1,802)	$ 481
Net investment hedge
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Other Comprehensive Income (Loss)		658	(1,802)	481
Gain (Loss) Reclassified from Other Comprehensive Income (Loss) to Earnings (Loss)		0	0	0
Convertible debt embedded derivative
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments Gain (Loss), Net	[1]	$ (24,783)	$ 818	$ 0

[1] Reflected as “Loss (gain) on convertible debt embedded derivative” in the consolidated statements of operations.