Quarterly report pursuant to Section 13 or 15(d)

DERIVATIVE INSTRUMENTS AND PRICE RISK MANAGEMENT (Details)

v3.8.0.1
DERIVATIVE INSTRUMENTS AND PRICE RISK MANAGEMENT (Details)
3 Months Ended
Mar. 31, 2018
USD ($)
$ / bbl
bbl
Mar. 31, 2017
USD ($)
Non-cash gains or losses on derivative contracts [Abstract]    
Cash Received (Paid) on Settled Derivatives | $ $ (8,130,137) $ (95,659)
Non-Cash Mark-to-Market Gain (Loss) on Derivatives | $ (12,141,314) 17,056,542
Gain (Loss) on Derivative Instruments, Net | $ $ (20,271,451) $ 16,960,883
04/01/18 – 08/31/18    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 100,000  
Fixed price (in dollars per barrel) | $ / bbl 49.99  
04/01/18 – 08/31/18    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 100,000  
Fixed price (in dollars per barrel) | $ / bbl 50.04  
04/01/18 – 08/31/18    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 100,000  
Fixed price (in dollars per barrel) | $ / bbl 49.99  
04/01/18 – 08/31/18    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 100,000  
Fixed price (in dollars per barrel) | $ / bbl 50.17  
04/01/18 – 09/30/18    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 180,000  
Fixed price (in dollars per barrel) | $ / bbl 53.99  
04/01/18 – 09/30/18    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 180,000  
Fixed price (in dollars per barrel) | $ / bbl 53.99  
04/01/18 – 09/30/18    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 183,000  
Fixed price (in dollars per barrel) | $ / bbl 55.19  
04/01/18 – 12/31/18    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 135,000  
Fixed price (in dollars per barrel) | $ / bbl 53.30  
04/01/18 – 12/31/18    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 275,000  
Fixed price (in dollars per barrel) | $ / bbl 54.80  
04/01/18 – 12/31/18    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 275,000  
Fixed price (in dollars per barrel) | $ / bbl 54.09  
04/01/18 – 12/31/18    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 275,000  
Fixed price (in dollars per barrel) | $ / bbl 54.42  
10/01/18 – 12/31/18    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 92,000  
Fixed price (in dollars per barrel) | $ / bbl 52.50  
10/01/18 – 12/31/18    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 92,000  
Fixed price (in dollars per barrel) | $ / bbl 52.55  
10/01/18 – 12/31/18    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 46,000  
Fixed price (in dollars per barrel) | $ / bbl 54.50  
10/01/18 – 12/31/18    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 92,000  
Fixed price (in dollars per barrel) | $ / bbl 52.50  
01/01/19 – 03/31/19    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 45,000  
Fixed price (in dollars per barrel) | $ / bbl 54.22  
01/01/19 – 03/31/19    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 63,000  
Fixed price (in dollars per barrel) | $ / bbl 53.65  
01/01/19 – 12/31/19    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 365,000  
Fixed price (in dollars per barrel) | $ / bbl 51.05  
01/01/19 – 12/31/19    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 365,000  
Fixed price (in dollars per barrel) | $ / bbl 51.05  
01/01/19 – 12/31/19    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 182,500  
Fixed price (in dollars per barrel) | $ / bbl 52.70  
01/01/19 – 12/31/19    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 365,000  
Fixed price (in dollars per barrel) | $ / bbl 51.05  
01/01/19 – 12/31/19    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 182,500  
Fixed price (in dollars per barrel) | $ / bbl 52.15  
01/01/19 – 12/31/19    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 182,500  
Fixed price (in dollars per barrel) | $ / bbl 52.75  
01/01/19 – 12/31/19    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 219,000  
Fixed price (in dollars per barrel) | $ / bbl 57.30  
01/01/19 – 06/30/19    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 108,600  
Fixed price (in dollars per barrel) | $ / bbl 57.90  
04/01/19 – 06/30/19    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 45,500  
Fixed price (in dollars per barrel) | $ / bbl 53.59  
04/01/19 – 06/30/19    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 36,400  
Fixed price (in dollars per barrel) | $ / bbl 53.10  
07/01/19 – 09/30/19    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 46,000  
Fixed price (in dollars per barrel) | $ / bbl 53.07  
01/01/20 – 03/31/20    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 9,200  
Fixed price (in dollars per barrel) | $ / bbl 52.65  
01/01/20 – 03/31/20    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 27,300  
Fixed price (in dollars per barrel) | $ / bbl 51.81  
01/01/20 – 03/31/20    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 45,500  
Fixed price (in dollars per barrel) | $ / bbl 54.05  
01/01/20 – 03/31/20    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 45,500  
Fixed price (in dollars per barrel) | $ / bbl 54.25  
01/01/20 – 03/31/20    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 27,300  
Fixed price (in dollars per barrel) | $ / bbl 54.65  
01/01/20 – 12/31/20    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 366,000  
Fixed price (in dollars per barrel) | $ / bbl 49.77  
01/01/20 – 12/31/20    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 183,000  
Fixed price (in dollars per barrel) | $ / bbl 51.30  
01/01/20 – 12/31/20    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 109,800  
Fixed price (in dollars per barrel) | $ / bbl 51.70  
01/01/20 – 12/31/20    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 366,000  
Fixed price (in dollars per barrel) | $ / bbl 49.75  
01/01/20 – 12/31/20    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 183,000  
Fixed price (in dollars per barrel) | $ / bbl 51.10  
04/01/20 – 06/30/20    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 9,100  
Fixed price (in dollars per barrel) | $ / bbl 51.50  
04/01/20 – 06/30/20    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 9,100  
Fixed price (in dollars per barrel) | $ / bbl 54.70  
01/01/21 – 03/31/21    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 90,000  
Fixed price (in dollars per barrel) | $ / bbl 52.50  
01/01/21 – 03/31/21    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 90,000  
Fixed price (in dollars per barrel) | $ / bbl 53  
01/01/21 – 03/31/21    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 90,000  
Fixed price (in dollars per barrel) | $ / bbl 52.55  
01/01/21 – 03/31/21    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 18,000  
Fixed price (in dollars per barrel) | $ / bbl 53.20  
Total Open Commodity Swaps    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 6,100,000  
Weighted average price (in dollars per barrel) | $ / bbl 52.48  
2018    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 2,225,000  
Weighted average price (in dollars per barrel) | $ / bbl 53.33  
2019    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 2,215,200  
Weighted average price (in dollars per barrel) | $ / bbl 52.64  
2020    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 1,371,600  
Weighted average price (in dollars per barrel) | $ / bbl 50.77  
2021 and beyond    
Non-cash gains or losses on derivative contracts [Abstract]    
Oil (in barrels) | bbl 288,000  
Weighted average price (in dollars per barrel) | $ / bbl 52.72