Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities
Net income	$ 148,219	$ 36,371
Adjustments to reconcile net income to cash flows from operating activities
Depletion, depreciation, and amortization	156,711	154,448
Deferred income taxes	42,741	35,846
Stock-based compensation	8,711	12,215
Commodity derivatives expense (income)	189,601	(9,712)
Payment on settlements of commodity derivatives	(149,738)	(38,618)
Debt issuance costs	4,980	4,801
Other, net	(7,066)	(112)
Changes in assets and liabilities, net of effects from acquisitions
Accrued production receivable	(17,140)	3,590
Trade and other receivables	139	(13,604)
Other current and long-term assets	(4,467)	(4,734)
Accounts payable and accrued liabilities	27,435	(22,736)
Oil and natural gas production payable	(3,764)	(10,848)
Other liabilities	(2,832)	(4,048)
Net cash provided by operating activities	393,530	142,859
Cash flows from investing activities
Oil and natural gas capital expenditures	(210,504)	(197,982)
Acquisitions of oil and natural gas properties	(151)	(91,124)
Pipelines and plants capital expenditures	(19,134)	(1,479)
Net proceeds from sales of oil and natural gas properties and equipment	7,308	1,412
Other	5,749	(4,638)
Net cash used in investing activities	(216,732)	(293,811)
Cash flows from financing activities
Bank repayments	(1,943,653)	(1,188,000)
Bank borrowings	1,468,653	1,382,000
Interest payments treated as a reduction of debt	(37,233)	(25,139)
Proceeds from issuance of senior secured notes	450,000	0
Cost of debt financing	(15,933)	(341)
Pipeline financing and capital lease debt repayments	(18,353)	(20,523)
Other	(13,288)	1,603
Net cash provided by (used in) financing activities	(109,807)	149,600
Net increase (decrease) in cash, cash equivalents, and restricted cash	66,991	(1,352)
Cash, cash equivalents, and restricted cash at beginning of period	15,992	17,050
Cash, cash equivalents, and restricted cash at end of period	$ 82,983	$ 15,698

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-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585

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- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

+ Details

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