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Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Income Taxes [Line Items] |  |  |  |
Gross Massachusetts tax research other tax credit carryforwards | $ 8,933 |  |  |
Tax credit expiration period | 2029 |  |  |
Gross unrecognized tax benefits excluding interest and penalties | $ 4,332 | $ 19,610 | $ 47,684 | $ 40,674
Net unrecognized tax benefit excluding interest and penalties that would impact effective tax rate | 4,326 |  |  |
Net benefit to income tax expense, excluding interest and penalties, due to discrete reserve releases | 7,304 |  |  |
Accrued interest on unrecognized tax benefits | 157 | 578 | 2,159 |
Net unrecognized tax benefits, excluding interest and penalties, related to foreign tax positions | $ 923 |  |  |
Income tax examination, description | The Company is subject to examination by U.S. federal, state and foreign tax authorities. The United States Internal Revenue Service commenced an examination of our U.S. federal tax filings for tax years 2011 through 2013 during the quarter ended March 31, 2015. |  |  |
Change in valuation allowance | $ (20,636) | $ (339) | $ (395) |
Undistributed earnings in foreign subsidiaries | $ 450,000 |  |  |
Income tax holiday tax rate | 9.00% | 9.00% | 7.00% |
Other Operations [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Income tax holiday tax rate | 16.00% |  |  |
State and Foreign [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Operating loss carry forwards | $ 7,784 |  |  |
State and Foreign [Member] | Indefinite [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Operating loss carry forwards | 5,000 |  |  |
State and Foreign [Member] | 2021 [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Operating loss carry forwards | $ 2,784 |  |  |
Earliest Tax Year [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Income tax examination period | 2011 |  |  |
Latest Tax Year [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Income tax examination period | 2013 |  |  |

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- Definition A brief description of status of the tax examination, significant findings to date, and the entity's position with respect to the findings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
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