Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Cash flows from operating activities:
Net income	$ 51,413	$ 19,867
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for deferred income taxes	28,764	10,964
Asset retirement obligation accretion expense	176	88
Depreciation, depletion, and amortization	70,994	25,553
Amortization of debt issuance costs	946	318
Change in fair value of derivative instruments	10,810	(5,429)
Stock based compensation expense	3,318	936
Loss on sale of assets, net	1,397	(30)
Changes in operating assets and liabilities:
Accounts receivable	(18,584)	(12,185)
Accounts receivable-related party	(2,007)	5,110
Inventories	977	(96)
Prepaid expenses and other	(219)	(1,517)
Accounts payable and accrued liabilities	2,076	4,543
Accounts payable and accrued liabilities-related party	0	(74)
Accrued interest	3,415	0
Revenues and royalties payable	6,230	1,750
Net cash provided by operating activities	159,706	49,798
Cash flows from investing activities:
Additions to oil and natural gas properties-related party	(206,779)	(102,785)
Additions to oil and natural gas properties-related party	(2,571)	(9,298)
Acquisition of Gulfport properties	0	(18,550)
Acquisition of leasehold interests	(312,207)	(6,192)
Pipeline and gas gathering assets	(1,165)	0
Purchase of other property and equipment	(934)	(1,615)
Proceeds from sale of property and equipment	11	54
Settlement of non-hedge derivative instruments	0	(289)
Net cash used in investing activities	(523,645)	(138,675)
Cash flows from financing activities:
Proceeds from borrowings on credit facility	166,000	49,000
Repayment on credit facility	(130,000)	(49,000)
Debt issuance costs	(1,039)	(72)
Public offering costs	(946)	(447)
Proceeds from public offerings	347,679	144,936
Exercise of stock options	3,683	0
Net cash provided by financing activities	385,377	144,417
Net increase in cash and cash equivalents	21,438	55,540
Cash and cash equivalents at beginning of period	15,555	26,358
Cash and cash equivalents at end of period	36,993	81,898
Supplemental disclosure of cash flow information:
Interest paid, net of capitalized interest	11,409	383
Supplemental disclosure of non-cash transactions:
Asset retirement obligation incurred	382	111
Asset retirement obligation revisions in estimated liability	588	0
Asset retirement obligation acquired	1,312	0
Change in accrued capital expenditures	6,901	20,645
Capitalized stock based compensation	$ 2,715	$ 420