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Other Assets (Schedule Of Other Assets) (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Other Assets, Noncurrent Disclosure [Abstract]    
Plugging and abandonment escrow account on the WCBB properties $ 3,097 $ 3,105
Certificates of Deposit securing letter of credit 275 275
Prepaid drilling costs 510 526
Loan commitment fees 9,513 9,341
Derivative receivable 4,493 4,493
Deposits 34 34
Other 63 77
Other assets $ 17,985 $ 17,851