FINANCIAL STATEMENT PRESENTATION (Details) (USD $)	3 Months Ended			1 Months Ended	12 Months Ended	1 Months Ended	3 Months Ended	12 Months Ended			3 Months Ended	12 Months Ended	3 Months Ended
FINANCIAL STATEMENT PRESENTATION (Details) (USD $)	Mar. 31, 2011	Mar. 31, 2010	Dec. 31, 2010	Jan. 31, 2011 Fayetteville Shale	Dec. 31, 2010 Fayetteville Shale	May 31, 2010 KinderHawk Field Services LLC	Mar. 31, 2011 KinderHawk Field Services LLC	Dec. 31, 2010 KinderHawk Field Services LLC	May 21, 2010 KinderHawk Field Services LLC	May 21, 2010 KinderHawk Field Services LLC Kinder Morgan	Mar. 31, 2011 Gas gathering systems and equipment	Dec. 31, 2010 Gas gathering systems and equipment	Mar. 31, 2011 Automobiles, leasehold improvements, furniture and equipment	Mar. 31, 2011 Rental equipment	Mar. 31, 2011 Computers
Gas Gathering Systems and Equipment and Other Operating Assets
Capitalized interest	$ 700,000	$ 1,200,000
Summary of Significant Accounting Policies:
Cash contribution									917,000,000	917,000,000
Joint venture ownership percentage (as a percent)									50.00%	50.00%
Average useful life (in years)											30		5	7	3
Gross other operating property and equipment	704,698,000		648,703,000								647,027,000	748,112,000
Less - accumulated depreciation	(34,631,000)		(27,635,000)		(10,548,000)						(16,345,000)	(22,170,000)
Net other operating property and equipment	670,067,000		621,068,000		144,176,000						630,682,000	725,942,000
Net carrying value of the assets	647,027,000		593,388,000		154,724,000		430,900,000	434,600,000
Proceeds received from sale of midstream assets				75,000,000
Assets held for sale			74,448,000		74,448,000							155,000,000
Accumulated depreciation												11,000,000
Write down of the carrying amount of assets held for sale					(69,728,000)							69,700,000
Payable on financing arrangement	940,863,000					917,000,000
Payable on financing arrangement, current	7,200,000		7,100,000
Principal balance on financing arrangement							940,900,000	940,900,000
Payable on Financing Arrangement
Payable on financing arrangement at the end of the period	940,900,000
Goodwill
Number of reportable segments	2
Other Intangible Assets
Amortization expense	2,800,000	2,800,000
Estimated amortization expense per year for the remainder of the contract through 2019	11,100,000
Transportation contracts	105,108,000		105,108,000
Less - accumulated amortization	(18,529,000)		(15,766,000)
Net transportation	$ 86,579,000		$ 89,342,000

PETROHAWK ENERGY CORP 10-Q/A