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Financial Instruments (Tables) | 12 Months Ended
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Dec. 31, 2013
Carrying Value and Estimated Fair Value of Financial Instruments | The following table presents the financial instruments that are not carried at fair value but which require fair value disclosure:
|  | December 31, |  |  | December 31, |
|  | 2012 |  |  | 2013 |
|  | Carrying |  |  | Fair |  |  | Carrying |  |  | Fair |
|  | amount |  |  | value |  |  | amount |  |  | value |
Cash and cash equivalents |  | $ | 63,777 |  |  | $ | 63,777 |  |  | $ | 38,753 |  |  | $ | 38,753 |
Accounts receivable, net |  |  | 8,480 |  |  |  | 8,480 |  |  |  | 8,534 |  |  |  | 8,534 |
Accounts payable |  |  | 2,797 |  |  |  | 2,797 |  |  |  | 1,452 |  |  |  | 1,452 |
Variable rate long-term debt – (including current maturities) |  |  | 18,480 |  |  |  | 18,480 |  |  |  | - |  |  |  | - |

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- Definition Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. + 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 (a) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13433-108611 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13467-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13476-108611 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6447952&loc=d3e13220-108610 + Details
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