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Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Income Taxes [Line Items] |  |  |
Corporate income tax rate percent | 21.00% | 35.00% |
Net additional non-cash provisional income tax expenses | $ 19,180 |  |
Accumulated undistributed earnings and profits | 415,323 |  |
One-time transition tax accumulated undistributed earnings and profits | 373,768 |  |
Valuation allowance against deferred assets – non-current | 54,725 | $ 35,246 |
Gross unrecognized tax benefits, including interest and penalties | 13,953 | 20,231 |
Unrecognized tax benefit that if recognized would impact effective tax rate | 13,953 | 20,231 |
Accrued for interest and penalties | 3,390 | 5,288 |
Tax benefit | (95,429) | $ (79,358) | $ (103,819)
Chile |  |  |
Income Taxes [Line Items] |  |  |
Tax benefit | $ 6,802 |  |
Foreign | Significant Portion of Tax Credit Carryforwards |  |  |
Income Taxes [Line Items] |  |  |
Tax credit carryforwards expiring year | 2023 |  |
State | Minimum |  |  |
Income Taxes [Line Items] |  |  |
Net operating losses carried forward expiring period | 5 years |  |
State | Maximum |  |  |
Income Taxes [Line Items] |  |  |
Net operating losses carried forward expiring period | 20 years |  |
Net operating losses carried forward expiring year | 2037 |  |

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