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Other Assets (Schedule Of Other Assets) (Details) - USD ($) $ in Thousands | Jun. 30, 2015 | Dec. 31, 2014
--- | --- | ---
Schedule of Prepaid Expenses [Line Items] |  |
Plugging and abandonment escrow account on the WCBB properties (Note 9) | $ 3,089 | $ 3,097
Certificates of Deposit securing letter of credit | 275 | 275
Prepaid drilling costs | 269 | 483
Loan commitment fees | 21,640 | 15,390
Deposits | 34 | 34
Other | 111 | 117
Other assets | 25,418 | $ 19,396
Prepaid Expenses and Other Current Assets [Member] |  |
Schedule of Prepaid Expenses [Line Items] |  |
Prepaid taxes | 12,100 |
Prepaid insurance | 1,700 |
Prepaid other expenses | $ 1,400 |

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