UNAUDITED CRUDE OIL AND NATURAL GAS RESERVES INFORMATION - Proved Reserves (Details)	12 Months Ended
	Dec. 31, 2017 Boe location $ / MMBbls $ / Mcf $ / bbl Mcf bbl	Dec. 31, 2016 Boe $ / MMBbls $ / Mcf $ / bbl Mcf bbl	Dec. 31, 2015 Boe bbl
Proved Reserves, Total:
Balance, beginning of year | Boe	6,307,868		159
Revisions of previous estimates | Boe	(300,797)		(122)
Extensions and discoveries | Boe	2,168,180	6,030,624
Purchase of reserves | Boe		287,999
Production | Boe	(330,281)	(10,755)	(37)
Balance, end of year | Boe	7,844,970	6,307,868
Proved Developed Reserves (in energy) | Boe	1,534,172	740,088
Proved Undeveloped Reserves (in energy) | Boe	6,310,797	5,567,780
Oil (Bbls)
Proved Reserves:
Balance, beginning of year	2,761,204		159
Revisions of previous estimates	(388,211)		(122)
Extensions and discoveries	839,738	2,710,437
Purchase of reserves		55,669
Production	(188,529)	(4,902)	(37)
Balance, end of year	3,024,202	2,761,204
Proved Reserves, Total:
Proved Developed Reserves (in volume)	521,354	260,284
Proved Undeveloped Reserve (in volume)	2,502,847	2,500,920
Average resulting price (in dollars per barrel and Mcf) | $ / bbl	45.03	34.09
Natural Gas (Mcf)
Proved Reserves:
Balance, beginning of year | Mcf	11,492,855
Revisions of previous estimates | Mcf	292,477
Extensions and discoveries | Mcf	4,183,757	10,498,397
Purchase of reserves | Mcf		1,020,516
Production | Mcf	(549,846)	(26,058)
Balance, end of year | Mcf	15,419,243	11,492,855
Proved Reserves, Total:
Proved Developed Reserves (in volume) | Mcf	3,752,330	1,788,895
Proved Undeveloped Reserve (in volume) | Mcf	11,666,911	9,703,960
Unweighted average resulting price (in dollars per barrel and MMBtu) | $ / MMBbls	2.98	2.48
Average resulting price (in dollars per barrel and Mcf) | $ / Mcf	1.71	2.69
NGL's (Bbls)
Proved Reserves:
Balance, beginning of year	1,631,188
Revisions of previous estimates	38,668
Extensions and discoveries	631,149	1,570,454
Purchase of reserves		62,244
Production	(50,111)	(1,510)
Balance, end of year	2,250,894	1,631,188
Proved Reserves, Total:
Proved Developed Reserves (in volume)	387,430	181,655
Proved Undeveloped Reserve (in volume)	1,863,465	1,449,533
Average resulting price (in dollars per barrel and Mcf) | $ / bbl	20.42	14.44
Crude oil and NGLs
Proved Reserves, Total:
Unweighted average resulting price (in dollars per barrel and MMBtu) | $ / bbl	51.34	42.75
Todd Creek Farms
Proved Reserves, Total:
Number of PUD locations converted | location	18