Cash, Cash Equivalents and Investments - Narrative (Details) |
3 Months Ended | 6 Months Ended | |
|---|---|---|---|
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Jun. 30, 2015
USD ($)
security
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Jun. 30, 2015
USD ($)
security
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Jun. 30, 2014
USD ($)
|
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| Cash and Cash Equivalents [Abstract] | |||
| Number of owned securities that were in an unrealized loss position | security | 121 | 121 | |
| Unrealized losses deemed to be other-than-temporary | $ 0 | $ 0 | |
| Proceeds from sale of available-for-sale securities | 3,662,000 | $ 0 | |
| Realized gain or loss in connection with sale of available-for-sale securities | $ 0 | ||
| X | ||||||||||
- Definition This item represents the difference between the gross realized gains and losses realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. Additionally, this item would include any losses recognized for other than temporary impairments (OTTI) of the subject investments in debt and equity securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Number of investment positions in available-for-sale investments in a continuous unrealized loss position for which an other-than-temporary impairment (OTTI) has not been recognized in the income statement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition The amount by which the fair value of an investment in debt and equity securities categorized as Available-for-sale is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The cash inflow associated with the sale of debt and equity securities classified as available-for-sale securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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