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Short-Term and Long-Term Investments (Tables) | 6 Months Ended
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Jun. 30, 2014
Investments Debt And Equity Securities [Abstract] |
Summary of Available-for-Sale Securities | The following is a summary of available-for-sale securities (in thousands):
|  |  |  |  | Gross |  |  | Gross |  |  | Estimated |
|  |  |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
June 30, 2014 |  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
Failed Auction Securities |  | $ | 6,000 |  |  | $ | — |  |  | $ | 1,096 |  |  | $ | 4,904 |
Brokered certificates of deposit |  |  | 730 |  |  |  | 3 |  |  |  | — |  |  |  | 733 |
|  | $ | 6,730 |  |  | $ | 3 |  |  | $ | 1,096 |  |  | $ | 5,637 |
|  |  |  |  | Gross |  |  | Gross |  |  | Estimated |
|  |  |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
December 31, 2013 |  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
Failed Auction Securities |  | $ | 6,000 |  |  | $ | — |  |  | $ | 1,175 |  |  | $ | 4,825 |
Brokered certificates of deposit |  |  | 820 |  |  |  | 6 |  |  |  | — |  |  |  | 826 |
|  | $ | 6,820 |  |  | $ | 6 |  |  | $ | 1,175 |  |  | $ | 5,651 |
Amortized Cost and Estimated Fair Value of Available-for-Sale Securities by Contractual Maturities | The amortized cost and estimated fair value of available-for-sale securities on June 30, 2014, by contractual maturities, are shown below (in thousands):
|  |  |  |  | Estimated |
|  | Cost |  |  | Fair Value |
Due in one year or less |  | $ | 640 |  |  | $ | 642 |
Due in two to ten years |  |  | 90 |  |  |  | 91 |
Due in ten to twenty years |  |  | — |  |  |  | — |
Due in twenty to forty years |  |  | 6,000 |  |  |  | 4,904 |
|  | $ | 6,730 |  |  | $ | 5,637 |
Rollforward of Credit (Gain) Loss Recognized in Earnings on Available-for-Sale Auction Rate Securities | The following table represents a rollforward of the activity related to the credit (gain) loss recognized in earnings on available-for-sale auction rate securities held by the Company for the six months ended June 30 (in thousands):
|  | 2014 |  |  | 2013 |
Balance at the beginning of the period |  | $ | 395 |  |  | $ | 317 |
Changes in the amount related to credit (gain) loss for which other-than- temporary impairment was not previously recognized |  |  | (20 | ) |  |  | 86 |
Reduction for security sold during the period |  |  | — |  |  |  | (7 | )
Balance at the end of the period |  | $ | 375 |  |  | $ | 396 |

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- Definition Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27357-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27198-111563 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62586-112803 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 + Details
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- Definition Tabular disclosure of the amount of other than temporary impairment (OTTI) related to credit losses recognized in earnings including: (a) the beginning balance of the amount related to credit losses on debt securities held by the investor at the beginning of the period for which a portion of an OTTI was recognized in other comprehensive income; (b) additions for the amount related to the credit loss for which an OTTI was not previously recognized; (c) reductions for securities sold during the period (realized); (d) reductions for securities for which the amount previously recognized in other comprehensive income was recognized in earnings because the investor intends to sell the security or more likely than not will be required to sell the security before recovery of its amortized cost basis; (e) additional increases to the amount related to the credit loss for which an OTTI was previously recognized when the investor does not intend to sell the security and it is not more likely than not that the investor will be required to sell the security before recovery of its amortized cost basis; (f) reductions for increases in cash flows expected to be collected that are recognized over the remaining life of the security; and (g) the ending balance of the amount related to credit losses on debt securities held by the entity at the end of the period for which a portion of an OTTI was recognized in other comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27340-111563 + Details
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- Definition Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value. + References No definition available. + Details
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