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Provision for Income Taxes by Jurisdiction (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Taxes [Line Items]
Federal									$ 295	$ 214	$ 3,322
State									276	(67)	1,306
Foreign									3,507	2,821	2,293
Provision (benefit) for income taxes	$ 929	$ 1,141	$ 738	$ 1,269	$ 640	$ 789	$ 418	$ 1,121	$ 4,078	$ 2,968	$ 6,921

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Income Taxes [Line Items]

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Amount of current and deferred federal income tax expense (benefit) attributable to income (loss) from continuing operations.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
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Amount of current and deferred foreign income tax expense (benefit) attributable to income (loss) from continuing operations.

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Amount of state and local current and deferred income tax expense (benefit) attributable to continuing operations.

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