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Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Income Tax [Line Items] |  |  |  |
Federal statutory tax rate |  | 35.00% | 35.00% | 35.00%
Provision for income taxes attributable to the tax act |  | $ 143,400 |  |
Tax cuts and jobs act provisional income tax expense benefit |  | 158,000 |  |
Income tax benefit remeasurement of deferred tax assets and liabilities |  | 14,600 |  |
Tax benefit from stock options exercised |  | 100 | $ 400 | $ 3,200
Income tax benefit charged to additional paid-in capital |  |  |  | 2,300
Federal net operating losses, deferred tax asset before valuation allowance |  | 5,800 |  |
Deferred tax assets before valuation allowances |  | 3,300 |  |
Foreign net operating losses, deferred tax asset before valuation allowance |  | 273,100 |  |
Deferred tax assets related to foreign income tax credits re-classed to income taxes payable |  | 55,400 |  |
Deferred tax assets that do not satisfy realization criteria |  | 277,500 |  |
Increase (decrease) in valuation allowance |  | (7,300) |  |
Undistributed earnings |  | 2,500,000 |  |
Additional undistributed foreign earnings |  | 0 |  |
Unrecognized tax benefits |  | 35,826 | 94,915 | 92,538
Unrecognized tax benefits that would affect our effective tax rate |  | 18,800 | 39,100 |
Unrecognized tax benefits that would affect our effective tax rate, net of federal benefits received |  | 18,000 | 35,700 |
Income tax benefits related to interest and penalties |  | 1,000 | 2,900 | $ 3,200
Liability for interest and penalties |  | 3,900 | 31,700 |
Interest expense |  | 3,400 | $ 24,300 |
Settlement of federal tax audits tax year 2005 to 2012 [Member] |  |  |  |
Income Tax [Line Items] |  |  |  |
Gross unrecognized tax benefits released |  | 58,200 |  |
Income tax benefits related to decreases in tax positions |  | 17,000 |  |
Income tax benefits related to interest and penalties |  | $ 15,300 |  |
Minimum [Member] |  |  |  |
Income Tax [Line Items] |  |  |  |
Settlement of federal tax audits for tax year |  | 2005 |  |
Maximum [Member] |  |  |  |
Income Tax [Line Items] |  |  |  |
Settlement of federal tax audits for tax year |  | 2012 |  |
Foreign income tax credits [Member] |  |  |  |
Income Tax [Line Items] |  |  |  |
Increase (decrease) in valuation allowance |  | $ (42,300) |  |
U.S. net operating loss utilization [Member] |  |  |  |
Income Tax [Line Items] |  |  |  |
Increase (decrease) in valuation allowance |  | 6,200 |  |
Remeasurement due to enactment of tax act [Member] |  |  |  |
Income Tax [Line Items] |  |  |  |
Increase (decrease) in valuation allowance |  | 5,200 |  |
Foreign net operating loss utilization [Member] |  |  |  |
Income Tax [Line Items] |  |  |  |
Increase (decrease) in valuation allowance |  | 4,700 |  |
Foreign currency translation [Member] |  |  |  |
Income Tax [Line Items] |  |  |  |
Increase (decrease) in valuation allowance |  | 28,800 |  |
Foreign NOLs [Member] |  |  |  |
Income Tax [Line Items] |  |  |  |
Increase (decrease) in valuation allowance |  | 20,300 |  |
U.S. NOLs [Member] |  |  |  |
Income Tax [Line Items] |  |  |  |
Increase (decrease) in valuation allowance |  | 2,000 |  |
Federal [Member] |  |  |  |
Income Tax [Line Items] |  |  |  |
Net operating loss carryforwards |  | $ 27,500 |  |
Operating loss carryforward, expiration period |  | 2023 |  |
Foreign [Member] |  |  |  |
Income Tax [Line Items] |  |  |  |
Operating loss carryforward, expiration period |  | 2018 |  |
State [Member] |  |  |  |
Income Tax [Line Items] |  |  |  |
Operating loss carryforward, expiration period |  | 2018 |  |
Scenario, Forecast [Member] |  |  |  |
Income Tax [Line Items] |  |  |  |
Federal statutory tax rate | 21.00% |  |  |

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