Foreign Currency Translation - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2019	Dec. 31, 2018
Foreign Currency [Abstract]
Accumulated other comprehensive income (loss)	$ 321,634	$ 319,007
Cumulative foreign currency adjustments	$ 314,545	$ 315,300
Cumulative inflation rate	100.00%
Cumulative inflation period	3 years

Accumulated adjustment, net of tax, that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency from the functional currency of the reporting entity, net of reclassification of realized foreign currency translation gains or losses.

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Name:	us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant