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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
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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.

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