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Schedule of Change in Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017
Income Tax Uncertainties [Abstract] |  |
Unrecognized tax benefits at January 1, 2018 (as adjusted) | $ 3,444 |
Increase related to positions taken in prior period | 314 |
Increase related to positions taken in current period | 596 |
Decrease related to expiration of statute of limitations | (295) |
Unrecognized tax benefits at December 31, 2018 | 4,059 |
Accrued interest | 705 | $ 600
Unrecognized tax benefits recorded in other long-term liabilities at December 31, 2018 | $ 4,764 |

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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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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