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Fair Value Measurements (Tables) | 6 Months Ended
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Jun. 30, 2013
Fair Value Disclosures [Abstract] |
Assets Measured at Fair Value on Recurring Basis | Assets measured at fair value on a recurring basis include the following as of June 30, 2013 (in thousands):
|  | Using |  |  |  |
|  | Quoted Prices in Active Markets (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |  |  | Total Fair Value as of June 30, 2013 |
Cash Equivalents: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | $ | 12,674 |  |  | $ | — |  |  | $ | — |  |  | $ | 12,674 |
Long-term investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Failed Auction Securities |  |  | — |  |  |  | — |  |  |  | 4,917 |  |  |  | 4,917 |
Brokered certificates of deposit |  |  | — |  |  |  | 1,290 |  |  |  | — |  |  |  | 1,290 |
Certificate of deposit |  |  | 231 |  |  |  | — |  |  |  | — |  |  |  | 231 |
Quantitative Information about Level 3 Fair Value Measurements | Quantitative information about Level 3 fair value measurements as of June 30, 2013 are as follows (dollars in thousands):
|  | Fair Value |  |  | Valuation Technique |  | Unobservable Input |  | Range (Weighted Average)
Failed Auction Securities |  | $ | 4,917 |  |  | Discounted cash flow |  | Cumulative probability of earning the maximum rate until maturity |  | 0.01% - 0.05% (0.03)%
|  |  |  |  |  |  |  | Cumulative probability of principal return prior to maturity |  | 73.19% - 95.27% (84.23)%
|  |  |  |  |  |  |  | Cumulative probability of default |  | 4.72% - 26.76% (15.74)%
|  |  |  |  |  |  |  | Liquidity risk premium |  | 5.00% - 5.00% (5.00)%
|  |  |  |  |  |  |  | Recovery rate in default |  | 40.00% - 40.00% (40.00)%
Change in Estimated Fair Values Calculated for Assets Valued on Recurring Basis Utilizing Level 3 Inputs | The following table summarizes the change in the estimated fair values calculated for those assets valued on a recurring basis utilizing Level 3 inputs (i.e., the Failed Auction Securities) for the six months ended June 30, 2013 (in thousands):
Balance at the beginning of the period |  | $ | 4,979 |
Redemptions, at par |  |  | (100 | )
Credit loss on available-for-sale securities included in Other income (expense), net |  |  | (79 | )
Unrealized gain included in Other comprehensive income (loss) |  |  | 117 |
Balance at the end of the period |  | $ | 4,917 |

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- Definition Tabular disclosure of the inputs and valuation techniques used to measure fair value, and a discussion of changes in valuation techniques and related inputs, if any, applied during the period to each separate class of assets, liabilities, and financial instruments classified in shareholders' equity that are measured on a recurring and/or nonrecurring basis. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by 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 (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: 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=25499696&loc=d3e19190-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by 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 (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: 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=25499696&loc=d3e19190-110258 + Details
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