Income Taxes - Reconciliation of Unrecognized Tax Benefits (Detail) $ in Thousands |
12 Months Ended |
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Dec. 31, 2017
USD ($)
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| Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] | |
| Beginning balance | $ (4,628) |
| Reductions based on tax positions taken during a prior period | 3 |
| Additions based on tax positions taken during the current period | (770) |
| Ending balance | $ (5,395) |
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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- Definition Amount of unrecognized tax benefits. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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