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Income Taxes - Differences Between Income Tax Provisions and Provisions for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Expected tax at statutory rate	$ 17,305	$ 13,272	$ 4,940
Foreign taxes at other rates	(12,487)	(9,107)	(2,520)
US tax on foreign earnings, net of foreign tax credits	1,968	(9)	212
Valuation reserves on NOL carryforwards	469	2	6
State income taxes, net of federal benefit	26	140	(310)
Disallowed expenses and other	1,423	1,011	819
Total	$ 8,704	$ 5,309	$ 3,147

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to foreign income tax expense (benefit).

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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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