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v2.4.0.6

Long-Term Debt (Tables) | 6 Months Ended
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Jun. 30, 2012
Schedule Of Long-Term Debt Interest Rate |
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
Name: | us-gaap_ScheduleOfDebtTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration