ACQUISITIONS: (Details 2) (USD $)	0 Months Ended	1 Months Ended	3 Months Ended								12 Months Ended
	Dec. 31, 2010	Jun. 30, 2012	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010 Bonanza Creek Energy, Inc.	Dec. 31, 2010 Pro Forma Adjustments	Dec. 31, 2010 Bonanza Creek Energy, Inc.	Dec. 31, 2010 Holmes Eastern Company, LLC	Dec. 31, 2010 Bonanza Creek Energy Company, LLC
Net revenues:
Oil and gas sales	$ 1,620,192		$ 73,591,893,000	$ 58,327,823,000	$ 51,455,094,000	$ 47,830,431,000	$ 35,115,000,000	$ 25,915,330,000	$ 24,151,668,000	$ 20,541,995,000	$ 231,205,241	$ 105,723,993	$ 1,620,192		$ 59,083,836	$ 13,957,560	$ 43,506,084
Operating expenses:
Lease operating	419,100										30,695,192	18,252,963	419,100		14,377,212	2,010,187	11,947,925
Severance and ad valorem taxes	66,460										13,673,814	5,918,566	66,460		2,368,219	834,282	1,467,477
Exploration											10,714,918	876,971			245,686	19,234	226,452
Depreciation, depletion and amortization	435,552										66,201,942	28,014,077	435,552	2,815,872	18,855,741	3,005,888	12,598,429
General and administrative	323,545										31,404,970	17,612,943	323,545		9,338,018	639,598	8,374,875
Cancelled private placement															2,378,468		2,378,468
Total operating expenses	1,244,657										153,302,191	71,298,559	1,244,657	2,815,872	47,563,344	6,509,189	36,993,626
INCOME FROM OPERATIONS	375,535		36,665,466,000	29,145,797,000	28,696,782,000	26,126,248,000	17,221,606,000	13,556,361,000	12,451,574,000	10,308,846,000	77,903,050	34,425,434	375,535	(2,815,872)	11,520,492	7,448,371	6,512,458
Other income (expense):
Other income (loss)											(132,526)	(110,276)			(46,521)	(65,694)	19,173
Write-off of deferred financing costs															(1,663,167)		(1,663,167)
Change in fair value of warrant put option														(34,344,894)			34,344,894
Amortization of debt discount														8,861,955			(8,861,955)
Realized gain on settled commodity derivatives	(46,742)										(725,382)	(3,024,136)	(46,742)		5,871,960		5,918,702
Unrealized loss in fair value of commodity derivatives	(514,627)										1,649,687	225,393	(514,627)		(8,119,369)		(7,604,742)
Interest expense	(57,656)										(4,132,955)	(4,017,230)	(57,656)	17,234,623	(1,263,000)	(439,171)	(18,000,796)
Total other income (expense)	(619,025)										(3,341,176)	(6,926,249)	(619,025)	(8,248,316)	(5,220,097)	(504,865)	4,152,109
Income (loss) from continuing operations	(243,490)										74,561,874	27,499,185	(243,490)	(11,064,188)	6,300,395	6,943,506	10,664,567
(Loss) income from operations associated with oil and gas properties held for sale	(12,689)										(926,671)	(3,609,764)	(12,689)	(363,624)	(312,351)		63,962
Gain on sale of oil and gas properties		4,200,000									4,192,120				4,055,153		4,055,153
NET INCOME (LOSS)	$ (161,726)		$ 13,049,434,000	$ 3,420,887,000	$ 21,506,103,000	$ 8,546,153,000	$ (176,836,000)	$ 4,833,352,000	$ 7,707,745,000	$ 326,920,000	$ 46,522,577	$ 12,691,181	$ (256,179)	$ (11,427,812)	$ 10,043,197	$ 6,943,506	$ 14,783,682