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Long-Term Debt (Tables) | 12 Months Ended
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Dec. 31, 2012
Schedule of Long-Term Debt Interest Rate | As of December 31, 2012, any outstanding LIBOR and ABR loans would have borne their respective interest rates plus the applicable margin indicated in the following table:
Ratio of Total Outstanding Borrowings to Borrowing Base |  | Applicable Margin for LIBOR Loans |  |  | Applicable Margin for ABR Loans |
Less than .25 to 1 |  |  | 1.50 | % |  |  | 0.00 | %
Greater than or equal to .25 to 1 but less than .50 to 1 |  |  | 1.75 | % |  |  | 0.25 | %
Greater than or equal to .50 to 1 but less than .75 to 1 |  |  | 2.00 | % |  |  | 0.50 | %
Greater than or equal to .75 to 1 but less than .90 to 1 |  |  | 2.25 | % |  |  | 0.75 | %
Greater than .90 to 1 but less than or equal 1 |  |  | 2.50 | % |  |  | 1.00 | %

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