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Fair Value Measurements (Tables) | 12 Months Ended
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Dec. 31, 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 December 31, 2013 (in thousands):
|  | Using |  |  | Total Fair Value as of December 31, 2013 |
|  | Quoted Prices in Active Markets (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |  |
Cash Equivalents: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | $ | 12,407 |  |  | $ | — |  |  | $ | — |  |  | $ | 12,407 |
Short-term investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Brokered certificates of deposit |  |  | — |  |  |  | 463 |  |  |  | — |  |  |  | 463 |
Long-term investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Failed Auction Securities |  |  | — |  |  |  | — |  |  |  | 4,825 |  |  |  | 4,825 |
Brokered certificates of deposit |  |  | — |  |  |  | 363 |  |  |  | — |  |  |  | 363 |
Assets measured at fair value on a recurring basis include the following as of December 31, 2012 (in thousands):
|  | Using |  |  | Total Fair Value as of December 31, 2012 |
|  | Quoted Prices in Active Markets (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |  |
Cash Equivalents: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | $ | 12,413 |  |  | $ | — |  |  | $ | — |  |  | $ | 12,413 |
Long-term investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Failed Auction Securities |  |  | — |  |  |  | — |  |  |  | 4,979 |  |  |  | 4,979 |
Brokered certificates of deposit |  |  | — |  |  |  | 1,292 |  |  |  | — |  |  |  | 1,292 |
Certificates of deposit |  |  | 465 |  |  |  | — |  |  |  | — |  |  |  | 465 |
Quantitative Information about Level 3 Fair Value Measurements | Quantitative information about Level 3 fair value measurements as of December 31, 2013 are as follows (dollars in thousands):
|  | Fair Value |  |  | Valuation Technique |  | Unobservable Input |  | Range (Weighted Average)
Failed Auction Securities |  | $ | 4,825 |  |  | Discounted cash flow |  | Cumulative probability of earning the maximum rate until maturity |  | 0.01% - 0.07% (0.04%)
|  |  |  |  |  |  |  | Cumulative probability of principal return prior to maturity |  | 69.67% - 94.16% (81.92%)
|  |  |  |  |  |  |  | Cumulative probability of default |  | 5.83% - 30.27% (18.05%)
|  |  |  |  |  |  |  | Liquidity risk premium |  | 5.00% - 5.00% (5.00%)
|  |  |  |  |  |  |  | Recovery rate in default |  | 40.00% - 40.00% (40.00%)
Change in Estimated Fair Values for Assets Valued on Recurring Basis Utilizing Level 3 Inputs | The following table summarizes the change in the fair values for those assets valued on a recurring basis utilizing Level 3 inputs for the year ended December 31, 2013 (in thousands):
Balance at the beginning of the period |  | $ | 4,979 |
Redemptions |  |  | (100 | )
Credit losses on available for sales securities included in Other income, net |  |  | (78 | )
Unrealized gain included in Other comprehensive income (loss) |  |  | 24 |
Balance at the end of the period |  | $ | 4,825 |

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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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