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Reconciliation of Total Amounts of Unrecognized Tax Benefits Excluding Interest and Penalties (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Beginning Balance	$ 18,266	$ 17,403	$ 17,133
Gross increases - tax positions in prior periods		92	13
Gross decreases - tax positions in prior periods	(143)	(12)
Gross increases - current period tax positions	424	265	923
Settlements	(7,191)	(177)	(924)
Foreign currency translation adjustments	(795)	695	258
Ending Balance	$ 10,561	$ 18,266	$ 17,403

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Unrecognized tax benefits, foreign currency translation adjustments.

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Amount of unrecognized tax benefits.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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