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Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Detail) (USD $) |  |  |  | 6 Months Ended |  | 6 Months Ended |  | 6 Months Ended
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Jun. 29, 2014 | Dec. 31, 2013 | Jun. 29, 2014 Corporate Bonds | Jun. 29, 2014 Treasury Bills | Jun. 29, 2014 Asset-Backed Securities | Jun. 29, 2014 Sovereign Bonds | Jun. 29, 2014 Municipal Bonds | Jun. 29, 2014 Agency Bonds | Jun. 29, 2014 Fair Value, Measurements, Nonrecurring | Jun. 29, 2014 Quoted Prices in Active Markets for Identical Assets (Level 1) Fair Value, Measurements, Recurring | Jun. 29, 2014 Significant Other Observable Inputs (Level 2) Fair Value, Measurements, Recurring | Jun. 29, 2014 Significant Other Observable Inputs (Level 2) Fair Value, Measurements, Recurring Corporate Bonds | Jun. 29, 2014 Significant Other Observable Inputs (Level 2) Fair Value, Measurements, Recurring Treasury Bills | Jun. 29, 2014 Significant Other Observable Inputs (Level 2) Fair Value, Measurements, Recurring Asset-Backed Securities | Jun. 29, 2014 Significant Other Observable Inputs (Level 2) Fair Value, Measurements, Recurring Sovereign Bonds | Jun. 29, 2014 Significant Other Observable Inputs (Level 2) Fair Value, Measurements, Recurring Municipal Bonds | Jun. 29, 2014 Significant Other Observable Inputs (Level 2) Fair Value, Measurements, Recurring Agency Bonds | Jun. 29, 2014 Fair Value, Inputs, Level 3 Fair Value, Measurements, Nonrecurring
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market instruments | $ 1,358,000 | $ 520,000 |  |  |  |  |  |  |  | $ 1,358,000 | $ 0 |  |  |  |  |  |  |
Financial assets at fair value | 425,446,000 |  | 235,780,000 | 87,967,000 | 70,692,000 | 18,915,000 | 10,592,000 | 1,500,000 |  |  |  | 235,780,000 | 87,967,000 | 70,692,000 | 18,915,000 | 10,592,000 | 1,500,000 |
Assets, Cash flow hedge forward contracts |  |  |  |  |  |  |  |  |  |  | 45,000 |  |  |  |  |  |  |
Assets, Economic hedge forward contracts |  |  |  |  |  |  |  |  |  |  | 6,000 |  |  |  |  |  |  |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Liabilities, Cash flow hedge forward contracts |  |  |  |  |  |  |  |  |  |  | 127,000 |  |  |  |  |  |  |
Liabilities, Economic hedge forward contracts |  |  |  |  |  |  |  |  |  |  | 27,000 |  |  |  |  |  |  |
Asset Impairment Charges |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |  |
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net |  |  |  |  |  |  |  |  |  |  | $ 0 |  |  |  |  |  |  | $ 0

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- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=8077374&loc=d3e2420-110228 + Details
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- Definition Amount of debt securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 2 -Subparagraph (b)-(g) -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803 + Details
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- Definition Fair value as of the balance sheet date of all foreign currency derivative assets designated as cash flow hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624163-113959 + Details
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- Definition Fair value as of the balance sheet date of all foreign currency derivative liabilities designated as cash flow hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624163-113959 + Details
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- Definition Fair value portion of asset contracts related to the exchange of different currencies, including, but not limited to, foreign currency options, forward contracts, and swaps. + References No definition available. + Details
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- Definition Investment in short-term money-market instruments (such as commercial paper, banker's acceptances, repurchase agreements, government securities, certificates of deposit, and so forth) which are highly liquid (that is, readily convertible to known amounts of cash) and so near their maturity that they present an insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify as cash equivalents by definition. Original maturity means an original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 + Details
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- Definition The amount of other than temporary impairment (OTTI) losses on equity securities, OTTI related to credit losses on debt securities, and OTTI losses on debt securities when the entity intends to sell the securities or it is more likely than not that the entity will be required to sell the securities before recovery of its amortized cost basis. Additionally, this item includes OTTI losses recognized during the period on investments accounted for under the cost method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 8B -URI http://asc.fasb.org/extlink&oid=27724398&loc=SL6284393-111563 + Details
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