Income Taxes - Summary of Changes in Liability Related to Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
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| Income Tax Disclosure [Abstract] | |||
| Unrecognized tax benefit liability, Beginning Balance | $ 4,357 | $ 4,755 | $ 5,740 |
| New positions | 653 | ||
| Prior period positions: | |||
| Increases | 491 | 939 | 175 |
| Decreases | (539) | (415) | |
| Increases from current period positions | 692 | 615 | 184 |
| Lapse of statute of limitations | (781) | (1,290) | (1,114) |
| Other | (228) | (247) | (230) |
| Unrecognized tax benefit liability, Ending Balance | $ 4,645 | $ 4,357 | $ 4,755 |
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- Definition Unrecognized tax benefits increase decrease resulting from other adjustments. No definition available.
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- Definition Unrecognized tax benefits increases resulting from new positions. No definition available.
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- Definition Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in prior year tax returns. No definition available.
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- References 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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- Definition Amount of increase 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 decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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