v2.4.0.8

Assets Measured at Fair Value on Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2014 | Dec. 31, 2013
--- | --- | ---
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |
Total, Estimated Fair Value | $ 37,639 |  | $ 54,360 |
Money market funds |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |
Total, Estimated Fair Value | 2,709 | [1] | 6,088 | [1]
Term deposits |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |
Total, Estimated Fair Value |  |  | 7,122 | [1]
Commercial paper |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |
Total, Estimated Fair Value |  |  | 4,498 | [2]
Corporate bonds |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |
Total, Estimated Fair Value | 34,930 | [2] | 32,652 | [2]
Federal and municipal obligations |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |
Total, Estimated Fair Value |  |  | 4,000 | [3]
Quoted Prices In Active Markets for Identical Assets (Level 1) |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |
Total, Estimated Fair Value | 2,709 |  | 13,210 |
Quoted Prices In Active Markets for Identical Assets (Level 1) | Money market funds |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |
Total, Estimated Fair Value | 2,709 | [1] | 6,088 | [1]
Quoted Prices In Active Markets for Identical Assets (Level 1) | Term deposits |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |
Total, Estimated Fair Value |  |  | 7,122 | [1]
Significant Other Observable Inputs (Level 2) |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |
Total, Estimated Fair Value | 34,390 |  | 41,150 |
Significant Other Observable Inputs (Level 2) | Commercial paper |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |
Total, Estimated Fair Value |  |  | 4,498 | [2]
Significant Other Observable Inputs (Level 2) | Corporate bonds |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |
Total, Estimated Fair Value | 34,930 | [2] | 32,652 | [2]
Significant Other Observable Inputs (Level 2) | Federal and municipal obligations |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |
Total, Estimated Fair Value |  |  | $ 4,000 | [3]
[1] | Included in cash and cash equivalents in the Company's Condensed Consolidated Balance Sheet.
[2] | Included in short-term investments in the Company's Condensed Consolidated Balance Sheet
[3] | Of this amount, approximately $3 million was included in cash equivalents at December 31, 2013 and the remainder was included in short-term investments in the Company's Condensed Consolidated Balance Sheet.

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- Definition This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a recurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References No definition available. + Details
Name: | us-gaap_AssetsFairValueDisclosureRecurring
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration