Annual report pursuant to Section 13 and 15(d)

Other (Details)

v2.4.0.8
Other (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended 3 Months Ended 12 Months Ended 1 Months Ended 0 Months Ended 0 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Jun. 30, 2013
Reagan and Upton Counties Acreage Purchase [Member]
acre
Sep. 30, 2012
Borden County Acreage Purchase [Member]
acre
Mar. 31, 2012
Borden County Acreage Purchase [Member]
acre
Jun. 30, 2012
Southern Reagan County, Texas [Member]
acre
Dec. 31, 2013
Medusa Field [Member]
Dec. 31, 2013
Medusa Spar, LLC [Member]
Dec. 31, 2013
Medusa Fields, Medusa Spar LLC, And Gulf Of Mexico Shelf Properties [Member]
Dec. 31, 2013
Swan Lake Field [Member]
Dec. 31, 2012
Habanero Field (Garden Banks Block 341) [Member]
Dec. 31, 2011
Callon Entrada [Member]
Mar. 07, 2014
Subsequent Event [Member]
Dec. 31, 2013
Subsequent Event [Member]
Apr. 30, 2012
Cactus 1 Rig [Member]
Permian Basin [Member]
Horizontal Drilling Rig [Member]
Apr. 11, 2014
Cactus 1 Rig [Member]
Subsequent Event [Member]
Permian Basin [Member]
Horizontal Drilling Rig [Member]
Aug. 01, 2013
Patterson Rig [Member]
Permian Basin [Member]
Horizontal Drilling Rig [Member]
Feb. 17, 2014
Patterson Rig [Member]
Subsequent Event [Member]
Permian Basin [Member]
Horizontal Drilling Rig [Member]
Feb. 17, 2014
Cactus 2 Rig [Member]
Subsequent Event [Member]
Permian Basin [Member]
Horizontal Drilling Rig [Member]
Operating Leased Assets [Line Items]                                        
Business Combination, Bargain Purchase, Gain Recognized, Amount                         $ 5,041              
Gain (Loss) on Sale of Assets and Asset Impairment Charges (1,707) (1,177) 0                                  
Contracted drilling rig, term (in years)                               2 years 2 years 1 year   2 years
Contract Termination Liability                                     2,055  
Operating lease payments 12,860                                      
Lease payments in 2012                             13,954          
Lease payments in 2013                             9,308          
Operating Leases, Future Minimum Payments, Due in Three Years                             2,295          
Contractual Obligation, Due in Next Twelve Months                           19,732            
Contractual Obligation, Due in Second Year                           18,250            
Contractual Obligation, Due in Third Year                           4,500            
Gas and Oil Area, Developed and Undeveloped, Gross       2,468 8,095 16,233 2,319                          
Gas and Oil Area, Developed and Undeveloped, Net       2,186 6,964 14,653 1,762                          
Business Combination, Consideration Transferred       11,000 4,835 14,538 12,012                          
Divestiture of Business, Percentage Of Business Sold               15.00% 10.00%   69.00% 11.25%                
Divestiture of Business, Sales Price                   $ 88,000 $ 2,000 $ 39,410