Quarterly report pursuant to Section 13 or 15(d)

RELATED PARTY TRANSACTIONS (Details)

v3.3.0.814
RELATED PARTY TRANSACTIONS (Details) - Emerald [Member]
$ in Millions
9 Months Ended
Sep. 30, 2015
USD ($)
Well
Sep. 30, 2014
USD ($)
Dec. 31, 2014
USD ($)
Related Party Transaction [Line Items]      
Number of producing wells, gross 48    
Number of producing wells, net 8.1    
Number of drilling or awaiting completion wells, gross 0    
Number of drilling or awaiting completion wells, net 0    
Amount incurred in working interest of its wells | $ $ 86.2    
Accounts receivable from related parties | $ 1.5   $ 2.9
Accounts payable to related parties | $ 2.1   $ 8.4
Revenue from related party transactions | $ $ 7.1 $ 18.7