FAIR VALUE (Details) (USD $)	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Current	$ 17,732,562	$ 0
Derivative Assets, Noncurrent	10,865,174	0
Derivative Liabilities, Current	0	(9,363,068)
Derivative Liabilities, Noncurrent	0	(2,574,903)
Senior unsecured notes outstanding	300,000,000	0
Outstanding under a revolving credit facility	0	69,900,000	69,900,000
Estimated fair value of the Company's debt	303,000,000		69,900,000
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Current	0
Derivative Assets, Noncurrent	0
Total	0
Derivative Liabilities, Current		0
Derivative Liabilities, Noncurrent		0
Total		0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Current	17,732,562
Derivative Assets, Noncurrent	10,865,174
Total	28,597,736
Derivative Liabilities, Current		(9,363,068)
Derivative Liabilities, Noncurrent		(2,574,903)
Total		(11,937,971)
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Current	0
Derivative Assets, Noncurrent	0
Total	0
Derivative Liabilities, Current		0
Derivative Liabilities, Noncurrent		0
Total		$ 0