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Prepaid Expenses and Other Current Assets (Tables)
12 Months Ended
Dec. 31, 2012
Prepaid Expenses And Other Current Assets [Abstract]  
Prepaid Expenses And Other Current Assets [Table Text Block]
 December 31,
  2012 2011
Prepaid well and drilling costs$ 2,843$ 3,053
Prepaid insurance  3,330  1,346
Inventory  5,127  1,629
Fair market value of commodity derivatives – current  -  1,247
Deposits and other costs related to the Alba Acquisition  -  9,064
Deferred tax asset  8,089  -
Other  1,606  2,501
     
 $ 20,995$ 18,840