DERIVATIVE INSTRUMENTS/HEDGING (Details)	Feb. 23, 2016 MMBTU / D $ / MMBTU	Dec. 31, 2015 MMBTU / D $ / bbl $ / MMBTU
Derivative Contract Oil Three-Way Collars WTI Index [Member] | 2016 [Member]
Fair values of derivative assets and liabilities
Volume | MMBTU / D		1,098,000
Weighted Average Price
Ceiling, weighted average price (in dollars per unit) | $ / bbl		60.00
Derivative Contract Oil Three-Way Collars WTI Index [Member] | First Quarter - 2016 [Member]
Fair values of derivative assets and liabilities
Volume | MMBTU / D		273,000
Weighted Average Price
Ceiling, weighted average price (in dollars per unit) | $ / bbl		60.00
Derivative Contract Oil Three-Way Collars WTI Index [Member] | Second Quarter - 2016 [Member]
Fair values of derivative assets and liabilities
Volume | MMBTU / D		273,000
Weighted Average Price
Ceiling, weighted average price (in dollars per unit) | $ / bbl		60.00
Derivative Contract Oil Three-Way Collars WTI Index [Member] | Third Quarter - 2016 [Member]
Fair values of derivative assets and liabilities
Volume | MMBTU / D		276,000
Weighted Average Price
Ceiling, weighted average price (in dollars per unit) | $ / bbl		60.00
Derivative Contract Oil Three-Way Collars WTI Index [Member] | Fourth Quarter - 2016 [Member]
Fair values of derivative assets and liabilities
Volume | MMBTU / D		276,000
Weighted Average Price
Ceiling, weighted average price (in dollars per unit) | $ / bbl		60.00
Derivative Contract Gas Collar PEPL Index [Member] | 2016 [Member]
Fair values of derivative assets and liabilities
Volume | MMBTU / D		3,660,000
Weighted Average Price
Floor, weighted average price (in dollars per unit)		2.70
Ceiling, weighted average price (in dollars per unit)		2.85
Derivative Contract Gas Collar PEPL Index [Member] | First Quarter - 2016 [Member]
Fair values of derivative assets and liabilities
Volume | MMBTU / D		910,000
Weighted Average Price
Floor, weighted average price (in dollars per unit)		2.70
Ceiling, weighted average price (in dollars per unit)		2.85
Derivative Contract Gas Collar PEPL Index [Member] | Second Quarter - 2016 [Member]
Fair values of derivative assets and liabilities
Volume | MMBTU / D		910,000
Weighted Average Price
Floor, weighted average price (in dollars per unit)		2.70
Ceiling, weighted average price (in dollars per unit)		2.85
Derivative Contract Gas Collar PEPL Index [Member] | Third Quarter - 2016 [Member]
Fair values of derivative assets and liabilities
Volume | MMBTU / D		920,000
Weighted Average Price
Floor, weighted average price (in dollars per unit)		2.70
Ceiling, weighted average price (in dollars per unit)		2.85
Derivative Contract Gas Collar PEPL Index [Member] | Fourth Quarter - 2016 [Member]
Fair values of derivative assets and liabilities
Volume | MMBTU / D		920,000
Weighted Average Price
Floor, weighted average price (in dollars per unit)		2.70
Ceiling, weighted average price (in dollars per unit)		2.85
Derivative Contract Gas Collar PEPL Index [Member] | Subsequent Event [Member] | 2016 [Member]
Fair values of derivative assets and liabilities
Volume | MMBTU / D	5,500,000
Weighted Average Price
Floor, weighted average price (in dollars per unit)	2.13
Ceiling, weighted average price (in dollars per unit)	2.70
Derivative Contract Gas Collar PEPL Index [Member] | Subsequent Event [Member] | Second Quarter - 2016 [Member]
Fair values of derivative assets and liabilities
Volume | MMBTU / D	1,820,000
Weighted Average Price
Floor, weighted average price (in dollars per unit)	2.13
Ceiling, weighted average price (in dollars per unit)	2.70
Derivative Contract Gas Collar PEPL Index [Member] | Subsequent Event [Member] | Third Quarter - 2016 [Member]
Fair values of derivative assets and liabilities
Volume | MMBTU / D	1,840,000
Weighted Average Price
Floor, weighted average price (in dollars per unit)	2.13
Ceiling, weighted average price (in dollars per unit)	2.70
Derivative Contract Gas Collar PEPL Index [Member] | Subsequent Event [Member] | Fourth Quarter - 2016 [Member]
Fair values of derivative assets and liabilities
Volume | MMBTU / D	1,840,000
Weighted Average Price
Floor, weighted average price (in dollars per unit)	2.13
Ceiling, weighted average price (in dollars per unit)	2.70
Derivative Contract Gas Collar PEPL Index [Member] | Subsequent Event [Member] | 2017 [Member]
Fair values of derivative assets and liabilities
Volume | MMBTU / D	3,620,000
Weighted Average Price
Floor, weighted average price (in dollars per unit)	2.13
Ceiling, weighted average price (in dollars per unit)	2.70
Derivative Contract Gas Collar PEPL Index [Member] | Subsequent Event [Member] | First Quarter - 2017 [Member]
Fair values of derivative assets and liabilities
Volume | MMBTU / D	1,800,000
Weighted Average Price
Floor, weighted average price (in dollars per unit)	2.13
Ceiling, weighted average price (in dollars per unit)	2.70
Derivative Contract Gas Collar PEPL Index [Member] | Subsequent Event [Member] | Second Quarter - 2017 [Member]
Fair values of derivative assets and liabilities
Volume | MMBTU / D	1,820,000
Weighted Average Price
Floor, weighted average price (in dollars per unit)	2.13
Ceiling, weighted average price (in dollars per unit)	2.70
Derivative Contract Gas Collar Perm EP [Member] | 2016 [Member]
Fair values of derivative assets and liabilities
Volume | MMBTU / D		4,870,000
Weighted Average Price
Floor, weighted average price (in dollars per unit)		2.75
Ceiling, weighted average price (in dollars per unit)		3.09
Derivative Contract Gas Collar Perm EP [Member] | First Quarter - 2016 [Member]
Fair values of derivative assets and liabilities
Volume | MMBTU / D		1,820,000
Weighted Average Price
Floor, weighted average price (in dollars per unit)		2.75
Ceiling, weighted average price (in dollars per unit)		3.12
Derivative Contract Gas Collar Perm EP [Member] | Second Quarter - 2016 [Member]
Fair values of derivative assets and liabilities
Volume | MMBTU / D		1,210,000
Weighted Average Price
Floor, weighted average price (in dollars per unit)		2.75
Ceiling, weighted average price (in dollars per unit)		3.09
Derivative Contract Gas Collar Perm EP [Member] | Third Quarter - 2016 [Member]
Fair values of derivative assets and liabilities
Volume | MMBTU / D		920,000
Weighted Average Price
Floor, weighted average price (in dollars per unit)		2.75
Ceiling, weighted average price (in dollars per unit)		3.06
Derivative Contract Gas Collar Perm EP [Member] | Fourth Quarter - 2016 [Member]
Fair values of derivative assets and liabilities
Volume | MMBTU / D		920,000
Weighted Average Price
Floor, weighted average price (in dollars per unit)		2.75
Ceiling, weighted average price (in dollars per unit)		3.06
Derivative Contract Gas Collar Perm EP [Member] | 2017 [Member]
Fair values of derivative assets and liabilities
Volume | MMBTU / D		1,810,000
Weighted Average Price
Floor, weighted average price (in dollars per unit)		2.75
Ceiling, weighted average price (in dollars per unit)		3.36
Derivative Contract Gas Collar Perm EP [Member] | First Quarter - 2017 [Member]
Fair values of derivative assets and liabilities
Volume | MMBTU / D		900,000
Weighted Average Price
Floor, weighted average price (in dollars per unit)		2.75
Ceiling, weighted average price (in dollars per unit)		3.36
Derivative Contract Gas Collar Perm EP [Member] | Second Quarter - 2017 [Member]
Fair values of derivative assets and liabilities
Volume | MMBTU / D		910,000
Weighted Average Price
Floor, weighted average price (in dollars per unit)		2.75
Ceiling, weighted average price (in dollars per unit)		3.36
Derivative Contract Gas Collar Perm EP [Member] | Subsequent Event [Member] | 2016 [Member]
Fair values of derivative assets and liabilities
Volume | MMBTU / D	5,500,000
Weighted Average Price
Floor, weighted average price (in dollars per unit)	2.25
Ceiling, weighted average price (in dollars per unit)	2.77
Derivative Contract Gas Collar Perm EP [Member] | Subsequent Event [Member] | Second Quarter - 2016 [Member]
Fair values of derivative assets and liabilities
Volume | MMBTU / D	1,820,000
Weighted Average Price
Floor, weighted average price (in dollars per unit)	2.25
Ceiling, weighted average price (in dollars per unit)	2.77
Derivative Contract Gas Collar Perm EP [Member] | Subsequent Event [Member] | Third Quarter - 2016 [Member]
Fair values of derivative assets and liabilities
Volume | MMBTU / D	1,840,000
Weighted Average Price
Floor, weighted average price (in dollars per unit)	2.25
Ceiling, weighted average price (in dollars per unit)	2.77
Derivative Contract Gas Collar Perm EP [Member] | Subsequent Event [Member] | Fourth Quarter - 2016 [Member]
Fair values of derivative assets and liabilities
Volume | MMBTU / D	1,840,000
Weighted Average Price
Floor, weighted average price (in dollars per unit)	2.25
Ceiling, weighted average price (in dollars per unit)	2.77
Derivative Contract Gas Collar Perm EP [Member] | Subsequent Event [Member] | 2017 [Member]
Fair values of derivative assets and liabilities
Volume | MMBTU / D	3,620,000
Weighted Average Price
Floor, weighted average price (in dollars per unit)	2.25
Ceiling, weighted average price (in dollars per unit)	2.77
Derivative Contract Gas Collar Perm EP [Member] | Subsequent Event [Member] | First Quarter - 2017 [Member]
Fair values of derivative assets and liabilities
Volume | MMBTU / D	1,800,000
Weighted Average Price
Floor, weighted average price (in dollars per unit)	2.25
Ceiling, weighted average price (in dollars per unit)	2.77
Derivative Contract Gas Collar Perm EP [Member] | Subsequent Event [Member] | Second Quarter - 2017 [Member]
Fair values of derivative assets and liabilities
Volume | MMBTU / D	1,820,000
Weighted Average Price
Floor, weighted average price (in dollars per unit)	2.25
Ceiling, weighted average price (in dollars per unit)	2.77
Minimum [Member] | Derivative Contract Oil Three-Way Collars WTI Index [Member] | 2016 [Member]
Weighted Average Price
Floor, weighted average price (in dollars per unit) | $ / bbl		40.00
Minimum [Member] | Derivative Contract Oil Three-Way Collars WTI Index [Member] | First Quarter - 2016 [Member]
Weighted Average Price
Floor, weighted average price (in dollars per unit) | $ / bbl		40.00
Minimum [Member] | Derivative Contract Oil Three-Way Collars WTI Index [Member] | Second Quarter - 2016 [Member]
Weighted Average Price
Floor, weighted average price (in dollars per unit) | $ / bbl		40.00
Minimum [Member] | Derivative Contract Oil Three-Way Collars WTI Index [Member] | Third Quarter - 2016 [Member]
Weighted Average Price
Floor, weighted average price (in dollars per unit) | $ / bbl		40.00
Minimum [Member] | Derivative Contract Oil Three-Way Collars WTI Index [Member] | Fourth Quarter - 2016 [Member]
Weighted Average Price
Floor, weighted average price (in dollars per unit) | $ / bbl		40.00
Maximum [Member] | Derivative Contract Oil Three-Way Collars WTI Index [Member] | 2016 [Member]
Weighted Average Price
Floor, weighted average price (in dollars per unit) | $ / bbl		50.00
Maximum [Member] | Derivative Contract Oil Three-Way Collars WTI Index [Member] | First Quarter - 2016 [Member]
Weighted Average Price
Floor, weighted average price (in dollars per unit) | $ / bbl		50.00
Maximum [Member] | Derivative Contract Oil Three-Way Collars WTI Index [Member] | Second Quarter - 2016 [Member]
Weighted Average Price
Floor, weighted average price (in dollars per unit) | $ / bbl		50.00
Maximum [Member] | Derivative Contract Oil Three-Way Collars WTI Index [Member] | Third Quarter - 2016 [Member]
Weighted Average Price
Floor, weighted average price (in dollars per unit) | $ / bbl		50.00
Maximum [Member] | Derivative Contract Oil Three-Way Collars WTI Index [Member] | Fourth Quarter - 2016 [Member]
Weighted Average Price
Floor, weighted average price (in dollars per unit) | $ / bbl		50.00