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Interest Income and Other (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Other Income and Expenses [Abstract]
Interest income									$ 4,761	$ 5,448	$ 3,968
Foreign exchange transaction gains (losses), net									(3,056)	261	(77)
Other									356	(732)	(139)
Total	$ (3,680)	$ 2,973	$ 2,609	$ 159	$ 2,903	$ 1,400	$ 2,474	$ (1,800)	$ 2,061	$ 4,977	$ 3,752

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Interest and Other Income (Expense), Net

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Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

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-Publisher FASB
-Name Accounting Standards Codification
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The net amount of operating interest income (expense).

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Amount of income (expense) related to nonoperating activities, classified as other.

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