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Income Taxes - Narrative (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Income Taxes [Line Items] |  |  |
Provision for income taxes | $ 52,049 | $ 38,205 | $ 27,162
Federal income tax rate (percent) | 35.00% | 35.00% | 35.00%
Undistributed earnings | $ 145,700 |  |
Valuation allowance | 34,642 | $ 18,892 |
Unrecognized tax benefits, including penalties and interest | 22,200 | 21,200 | $ 58,500
Net tax benefit from unrecognized tax benefits, if recognized | 9,900 | 7,100 | 14,900
Unrecognized tax benefits, income tax penalties and interest expense | 800 | 500 | $ 300
Unrecognized tax benefits, income tax penalties and interest accrued | 2,200 | $ 2,200 |
Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Provisional Income Tax Expense (Benefit) | 1,200 |  |
Foreign Subsidiaries |  |  |
Income Taxes [Line Items] |  |  |
Net operating loss carry forward | $ 159,700 |  |
Tax Holiday Through December 31, 2018 | Costa Rica |  |  |
Income Taxes [Line Items] |  |  |
Holiday tax rate | 100.00% |  |
Subsequent Four Years | Costa Rica |  |  |
Income Taxes [Line Items] |  |  |
Holiday tax rate | 50.00% |  |
Income tax holiday, term | 4 years |  |
State and Local Jurisdiction | Domestic Subsidiaries |  |  |
Income Taxes [Line Items] |  |  |
Net operating loss carry forward | $ 32,500 |  |

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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/presentationRef -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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