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Income Taxes - Changes in Valuation Allowance for Deferred Tax Assets (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Deferred Tax Assets, Valuation Allowance [Roll Forward] |  |  |
Beginning balance | $ 57,812 | $ 57,003 | $ 84,573
Amounts from acquisitions | 5,777 | (2,707) | 33,070
Divested balances | 0 | (351) | 0
Amounts recognized into income | (390) | 2,870 | (38,684)
Current increase (decrease) | 15,044 | 697 | (13,086)
Impact of foreign currency exchange | 4,101 | 300 | (8,870)
Ending balance | $ 82,344 | $ 57,812 | $ 57,003

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- Definition Deferred Tax Assets, Valuation Allowance, Amounts From Acquisitions + References No definition available. + Details
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- Definition Deferred Tax Assets, Valuation Allowance, Amounts From Divestitures + References No definition available. + Details
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- Definition Deferred Tax Assets Valuation Allowance Foreign Currency Translation Adjustments + References No definition available. + Details
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- Definition Deferred Tax Assets, Valuation Allowance [Roll Forward] + References No definition available. + Details
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- Definition Release of valuation allowance against income. + References No definition available. + Details
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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. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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- Definition Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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