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Fair Value Measurements (Tables) | 12 Months Ended
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Dec. 31, 2014
Fair Value Disclosures [Abstract] |
Asset and liabilities recorded at fair value | Asset and liabilities recorded at fair value in the accompanying balance sheets as of December 31, 2014 and 2013, respectively, were as follows:
|  | As of December 31, 2014
|  | Level 1 |  | Level 2 |  | Total
|  | (In thousands)
Assets: |  |  |  |  |  |
Investments |  | $ | — |  |  | $ | 12,283 |  |  | $ | 12,283 |
Debt securities: |  |  |  |  |  |
Demand obligations |  | — |  |  | 20,304 |  |  | 20,304 |
Total |  | $ | — |  |  | $ | 32,587 |  |  | $ | 32,587 |
Liabilities: |  |  |  |  |  |
Interest rate derivative financial instruments |  | $ | — |  |  | $ | 28,653 |  |  | $ | 28,653 |
Total |  | $ | — |  |  | $ | 28,653 |  |  | $ | 28,653 |
|  | As of December 31, 2013
|  | Level 1 |  | Level 2 |  | Total
|  | (In thousands)
Assets: |  |  |  |  |  |
Interest rate derivative financial instruments |  | $ | — |  |  | $ | 3,919 |  |  | $ | 3,919 |
Total |  | $ | — |  |  | $ | 3,919 |  |  | $ | 3,919 |
Liabilities: |  |  |  |  |  |
Interest rate derivative financial instruments |  | $ | — |  |  | $ | 26,078 |  |  | $ | 26,078 |
Total |  | $ | — |  |  | $ | 26,078 |  |  | $ | 26,078 |

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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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