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Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2016 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Income Taxes [Line Items] |  |  |  |  |
Loss carryforwards | $ 639,147 | $ 639,147 |  |  |
Tax credit carryforwards | 60,591 | 60,591 |  |  |
Deferred income tax asset valuation allowances | 74,125 | 74,125 | $ 77,334 |  |
Excess tax benefit, amount | $ 4,300 | $ 4,308 | 0 | $ 0 |
Percentage greater than threshold of Income tax examination of uncertain tax positions that should be recognized | 50.00% | 50.00% |  |  |
Net deferred income tax assets | $ 450,618 | $ 450,618 | 450,085 |  |
Unrecognized tax benefits, end of period | 109,347 | 109,347 | 118,099 | 100,357 | $ 111,370
Amount of unrecognized tax benefits that would impact the effective tax rate if recognized | 105,800 | 105,800 |  |  |
Recognized interest and penalties related to unrecognized tax benefits |  | 2,000 | 0 | (2,000) |
Accrued interest and penalties related to unrecognized tax benefits | 17,100 | 17,100 | 18,300 |  |
Amount of unrecognized tax benefits related to interest and penalties that would impact the effective tax rate if recognized | 16,200 | 16,200 |  |  |
Reasonably possible changes to unrecognized tax benefits related to settlement of tax audits and/or expiration of statutes of limitations within the next twelve months | (11,000) | (11,000) |  |  |
Net tax benefit |  | 16,800 | 19,100 | 42,600 |
Cumulative amount of undistributed earnings of foreign subsidiaries that is intended to be indefinitely reinvested and for which no deferred US income taxes have been provided | 7,000,000 | 7,000,000 |  |  |
Valuation Allowances Net Operating Losses and Tax Credit Carryforwards |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Deferred income tax asset valuation allowances | 65,200 | 65,200 |  |  |
Valuation Allowance for Other Deferred Tax Assets |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Deferred income tax asset valuation allowances | $ 8,900 | $ 8,900 |  |  |
Additional Paid-In Capital | New Accounting Pronouncement, Early Adoption, Effect | Accounting Standards Update 2016-09 |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Cumulative effect of new accounting principle in period of adoption |  |  | $ (2,800) | $ 21,200 |

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