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Fair Value Measurements (Tables) | 6 Months Ended
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Jun. 30, 2013
Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis | The following tables present our assets and liabilities carried at fair value that are measured on a recurring basis:
Description |  | Fair Value at June 30, 2013 |  |  | Fair Value Measurements at June 30, 2013 Using |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale securities |  | $ | 223 |  |  | $ | 223 |  |  |  | — |  |  |  | — |
Derivative financial instruments |  | $ | 1,331 |  |  |  | — |  |  | $ | 1,331 |  |  |  | — |
Description |  | Fair Value at December 31, 2012 |  |  | Fair Value Measurements at December 31, 2012 Using |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale securities |  | $ | 226 |  |  | $ | 226 |  |  |  | — |  |  |  | — |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative financial instruments |  | $ | 197 |  |  |  | — |  |  | $ | 197 |  |  |  | — |

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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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