ACCOUNTS PAYABLE AND ACCRUED EXPENSES (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Accounts payable and accrued expenses contain the following:
Drilling and completion costs	$ 104,210	$ 80,971
Accounts payable trade	17,207	3,288
Accrued general and administrative cost	11,648	12,720
Lease operating expense	4,574	5,440
Accrued reclamation cost	166	168
Accrued interest	15,491	7,065
Accrued oil and gas derivatives	955	446
Production and ad valorem taxes and other	13,910	11,567
Total accounts payable and accrued expenses	$ 168,161	$ 121,665