Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

LONG-TERM DEBT, DERIVATIVES AND LETTERS OF CREDIT - Fair Value and Balance Sheet Classification (Detail) - Long-term debt - USD ($) $ in Thousands	Dec. 31, 2018	May 17, 2018	Dec. 31, 2017
Designated as Hedging Instrument \| Net investment hedge
Derivatives, Fair Value [Line Items]
Fair value liability	$ (3,904)		$ (3,246)
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Convertible debt embedded derivative liability	$ 0	$ 45,400	$ 20,594