Quarterly report pursuant to Section 13 or 15(d)

Derivative Instruments and Hedging Activities (Schedule of Outstanding Oil and Natural Gas Derivative Contracts) (Details)

v3.4.0.3
Derivative Instruments and Hedging Activities (Schedule of Outstanding Oil and Natural Gas Derivative Contracts) (Details)
MMBTU in Thousands
1 Months Ended 3 Months Ended
May. 03, 2016
$ / bbl
MBbls
Mar. 31, 2016
MMBTU
$ / MMBTU
$ / bbl
MBbls
Swap Contracts for Remainder of 2016 [Member] | Crude Oil [Member] | Swap [Member]    
Derivative [Line Items]    
Total volume | MBbls   550
Average swap price   58.23
Swap Contracts for Remainder of 2016 [Member] | Natural Gas [Member] | Swap [Member]    
Derivative [Line Items]    
Total volume | MMBTU   1,650
Average swap price | $ / MMBTU   2.52
Swap Contracts for Period May Through September 2016 [Member] | Crude Oil [Member] | Swap [Member] | Subsequent Event [Member]    
Derivative [Line Items]    
Total volume | MBbls 153  
Average swap price 57.61  
WTI Three-way Collar Contract Covering Period of May Through September 2016 [Member] | Crude Oil [Member] | Subsequent Event [Member]    
Derivative [Line Items]    
Total volume | MBbls 153  
Swap Contracts Differentials for Remainder of 2016 [Member] | Crude Oil [Member] | Swap [Member]    
Derivative [Line Items]    
Total volume | MBbls   1,100
Average swap price   0.17
Collar Contracts Combined with Short Puts for Remainder of 2016 [Member] | Crude Oil [Member]    
Derivative [Line Items]    
Total volume | MBbls   550
Collar Contracts Combined with Short Puts for Remainder of 2016 [Member] | Crude Oil [Member] | Call Option [Member] | Short [Member]    
Derivative [Line Items]    
Strike price   65.00
Collar Contracts Combined with Short Puts for Remainder of 2016 [Member] | Crude Oil [Member] | Put Option [Member] | Long [Member]    
Derivative [Line Items]    
Strike price   55.00
Collar Contracts Combined with Short Puts for Remainder of 2016 [Member] | Crude Oil [Member] | Put Option [Member] | Short [Member]    
Derivative [Line Items]    
Strike price   40.33
Collar Contracts for Remainder of 2016 [Member] | Crude Oil [Member]    
Derivative [Line Items]    
Total volume | MBbls   550
Collar Contracts for Remainder of 2016 [Member] | Crude Oil [Member] | Call Option [Member] | Short [Member]    
Derivative [Line Items]    
Strike price   46.50
Collar Contracts for Remainder of 2016 [Member] | Crude Oil [Member] | Put Option [Member] | Long [Member]    
Derivative [Line Items]    
Strike price   37.50
Swap Contracts for Full Year of 2017 [Member] | Crude Oil [Member] | Swap [Member]    
Derivative [Line Items]    
Total volume | MBbls   730
Average swap price   44.50
Short Put Option Contracts for Full year of 2017 [Member] | Crude Oil [Member] | Put Option [Member] | Short [Member]    
Derivative [Line Items]    
Total volume | MBbls   730
Strike price   30.00
Short Call Option Contracts for Full Year of 2017 [Member] | Crude Oil [Member] | Call Option [Member] | Short [Member]    
Derivative [Line Items]    
Total volume | MBbls   670
Strike price   50.00