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Foreign Currency Translation - Additional Information (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Foreign Currency [Abstract]
Accumulated other comprehensive income (loss)	$ 402,380	$ 398,653
Cumulative foreign currency losses	$ 390,654	$ 375,644
Cumulative inflation rate	100.00%
Cumulative inflation period	3 years

X

- Definition

The period over which the cumulative inflation rate is measured to determine if highly inflationary economy, and therefore requiring remeasurement of subsidiary's financial statements.

+ References

No definition available.

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- Definition

Percentage of three-year cumulative inflation rate required to qualify as highly inflationary economy, and therefore requiring remeasurement of subsidiary's financial statements.

+ References

No definition available.

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- Definition

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.

+ References

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- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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