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Fair Value of Financial Instruments (Tables) | 12 Months Ended
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Dec. 31, 2012
Fair Value of Financial Instruments [Abstract] |
Summary of carrying amounts and fair values of long-term debt |
|  | December 31, 2012 |  |  | December 31, 2011 |
|  | Carrying Amount |  |  | Fair Value |  |  | Carrying Amount |  |  | Fair Value |
Variable rate long-term debt |  | $ | 38,087 |  |  | $ | 38,087 |  |  | $ | 40,989 |  |  | $ | 40,989 |
Fixed rate long-term debt |  | $ | 31,429 |  |  | $ | 32,818 |  |  | $ | 37,143 |  |  | $ | 37,500 |

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- Definition Tabular disclosure of information pertaining to carrying amount and estimated fair value of short-term and long-term debt instruments or arrangements, including but not limited to, identification of terms, features, and collateral requirements. + References No definition available. + Details
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