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Income Taxes - Differences between the income tax provisions computed using the statutory federal income tax rate and income tax provisions reported in the consolidated statements of operations (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Expected tax at statutory rate	$ 3,884	$ 17,305	$ 13,272
Foreign taxes at other rates	(7,512)	(12,487)	(9,107)
US tax on foreign earnings, net of foreign tax credits	(405)	1,968	(9)
Valuation reserves on NOL carryforwards	3,816	469	2
State income taxes, net of federal benefit	83	26	140
Disallowed expenses and other	997	1,423	1,011
Total	$ 863	$ 8,704	$ 5,309

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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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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 repatriation of foreign earnings.

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The portion of the valuation allowance pertaining to the deferred tax asset representing potential future taxable deductions from net operating loss carryforwards for which it is more likely than not that a tax benefit will not be realized.

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