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Fair Value Measurements | 12 Months Ended
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Dec. 31, 2011
Fair Value Measurements [Abstract] |
Fair Value Measurements | NOTE 5:- FAIR VALUE MEASUREMENTS In accordance with ASC 820, the Company measures its cash equivalents, short-term deposits, marketable securities, auction rate securities and foreign currency derivative contracts at fair value. Cash equivalents, short-term deposits, and marketable securities, except investments in auction rate securities are classified within Level 1 or Level 2. This is because these assets are valued using quoted market prices or alternative pricing sources and models utilizing market observable inputs. Foreign currency derivative contracts are classified within Level 2 as the valuation inputs are based on quoted prices and market observable data of similar instruments. Investments in auction rate securities are classified within Level 3 because they are valued using valuation techniques. Some of the inputs to these models are unobservable in the market and are significant. The Company values the Level 3 investments based on an externally developed valuation using discounted cash flow model, whose inputs include interest rate curves, credit spreads, bond prices, volatilities and illiquidity considerations. Unobservable inputs used in these models are significant to the fair value of the investments. The Company's financial assets measured at fair value on a recurring basis, excluding accrued interest components, consisted of the following types of instruments as of the following dates:
|  | December 31, 2010 |
|  | Fair value measurements using input type |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Cash equivalents: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | $ | 226,092 |  |  | $ | — |  |  | $ | — |  |  | $ | 226,092 |
Government and corporate debentures - fixed interest rate |  |  |  |  |  |  | 7,932 |  |  |  |  |  |  |  | 7,932 |
Marketable securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Government and corporate debentures - fixed interest rate |  |  | — |  |  |  | 1,323,370 |  |  |  | — |  |  |  | 1,323,370 |
Government-sponsored enterprises |  |  | — |  |  |  | 332,799 |  |  |  | — |  |  |  | 332,799 |
Government and corporate debentures - floating interest rate |  |  | — |  |  |  | 199,010 |  |  |  | — |  |  |  | 199,010 |
Auction rate securities |  |  | — |  |  |  | — |  |  |  | 7,990 |  |  |  | 7,990 |
Foreign currency derivative contracts |  |  | — |  |  |  | 1,219 |  |  |  | — |  |  |  | 1,219 |
Total financials assets |  | $ | 226,092 |  |  | $ | 1,864,330 |  |  | $ | 7,990 |  |  | $ | 2,098,412 |
|  | December 31, 2011 |
|  | Fair value measurements using input type |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Cash equivalents: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | $ | 303,780 |  |  | $ | — |  |  | $ | — |  |  | $ | 303,780 |
Marketable securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Government and corporate debentures - fixed interest rate |  |  | — |  |  |  | 1,624,096 |  |  |  | — |  |  |  | 1,624,096 |
Government-sponsored enterprises |  |  | — |  |  |  | 337,471 |  |  |  | — |  |  |  | 337,471 |
Government and corporate debentures - floating interest rate |  |  | — |  |  |  | 195,759 |  |  |  | — |  |  |  | 195,759 |
Auction rate securities |  |  | — |  |  |  | — |  |  |  | 6,078 |  |  |  | 6,078 |
Foreign currency derivative contracts |  |  | — |  |  |  | (351 | ) |  |  | — |  |  |  | (351 | )
Total financials assets |  | $ | 303,780 |  |  | $ | 2,156,975 |  |  | $ | 6,078 |  |  | $ | 2,466,833 |
The following table presents the changes in Level 3 instruments measured on a recurring basis for the year ended December 31, 2011. The Company's Level 3 instruments consist of Auction Rate Securities classified as available-for-sale with the unrealized gains and losses, net of tax, reported in "accumulated other comprehensive income (loss)" in shareholders' equity. Fair value measurements using significant unobservable inputs (Level 3):
|  | Auction rate securities |
Balance at January 1, 2010 |  | $ | 8,775 |
Unrealized losses included in earning (other than temporary impairment) |  |  | (785 | )
Balance at December 31, 2010 |  |  | 7,990 |
Securities sold during 2011 |  |  | (1,912 | )
Balance at December 31, 2011 |  | $ | 6,078 |

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- Definition Tabular disclosure of the fair value measurement of assets and liabilities which includes [financial] instruments measured at fair value that are classified in stockholders' equity. Such assets and liabilities may be measured on a recurring or nonrecurring basis. The disclosures which may be required or desired include: (1) for assets and liabilities measured on a recurring basis, disclosure may include: (a) the fair value measurements at the reporting date; (b) the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets or liabilities (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3); (c) for fair value measurements using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (i) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (ii) purchases, sales, issuances, and settlements (net); (iii) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs); (d) the amount of the total gains or losses for the period in subparagraph (c) (i) above included in earnings (or changes in net assets) that are attributable to the change in unrealized gains or losses relating to those assets and liabilities still held at the reporting date and a description of where those unrealized gains or losses are reported in the statement of income (or activities); (e) the valuation technique(s) used to measure fair value and a discussion of changes in valuation techniques, if any, during the period and (2) for assets and liabilities that are measured at fair value on a nonrecurring basis (for example, impaired assets) disclosure may include, in addition to (a) above: (a) the reasons for the fair value measurements recorded; (b) the same as (b) above; (c) for fair value measurements using significant unobservable inputs (Level 3), a description of the inputs and the information used to develop the inputs; and (d) the valuation technique(s) used to measure fair value and a discussion of changes, if any, in the valuation technique(s) used to measure similar assets and/or liabilities in prior periods. Where the quoted price in an active market for the identical liability is not available, the Level 1 input is the quoted price of an identical liability when traded as an asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19279-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 33 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 10 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19296-110258 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19207-110258 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 6 -Footnote 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19190-110258 + Details
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