Income Tax - Additional Information (Detail) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
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| Valuation allowance | $ 326 | ||
| Cash paid for income taxes | 16,740 | $ 12,931 | $ 150 |
| Gross unrecognized tax benefits | 1,007 | 0 | |
| UNITED KINGDOM | |||
| Valuation allowance | 326 | ||
| Net operating loss carryforwards | 300 | ||
| Research and development tax credits | 500 | ||
| International | |||
| Unremitted earnings of subsidiaries, foreign | 800 | ||
| Cash paid for income taxes | 0 | ||
| Other Liabilities, Non current | |||
| Gross unrecognized tax benefits | $ 1,007 | $ 0 | |
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible research tax credit carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of undistributed earnings of foreign subsidiaries intended to be permanently reinvested outside the country of domicile. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of unrecognized tax benefits. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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