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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) (in thousands) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2019 | Mar. 31, 2019 | Sep. 30, 2018 | Mar. 31, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Dec. 31, 2018
Cash flows from operating activities: |  |  |  |  |  |  |  |  |
Net income (loss) | $ 42,234 |  | $ (177,568) | $ (135,923) | $ 317,401 | $ (84,946) |  | $ 198,675 |
Adjustments to reconcile net income (loss) to net cash provided by operating activities: |  |  |  |  |  |  |  |  |
Net gain on divestiture activity | 0 |  |  | (786) |  | (323) |  | (425,656) |
Depletion, depreciation, amortization, and asset retirement obligation liability accretion | 211,125 |  |  | 201,105 |  | 595,201 |  | 483,343 |
Abandonment and impairment of unproved properties | 6,337 |  |  | 9,055 |  | 25,092 |  | 26,615 |
Stock-based compensation expense |  |  |  |  |  | 18,758 |  | 17,680 |
Net derivative (gain) loss | (100,889) |  |  | 178,026 |  | (3,463) |  | 249,304 |
Derivative settlement gain (loss) |  |  |  |  |  | 23,843 |  | (101,911) |
Amortization of debt discount and deferred financing costs |  |  |  |  |  | 11,554 |  | 11,542 |
Loss on extinguishment of debt | 0 |  |  | 26,722 |  | 0 |  | 26,722 |
Deferred income taxes | 19,617 |  |  | (36,833) |  | (13,620) |  | 60,672 |
Other, net |  |  |  |  |  | (2,291) |  | (2,084) |
Net change in working capital |  |  |  |  |  | 11,781 |  | (3,725) |
Net cash provided by operating activities |  |  |  |  |  | 581,586 |  | 541,177 |
Cash flows from investing activities: |  |  |  |  |  |  |  |  |
Net proceeds from the sale of oil and gas properties |  |  |  |  |  | 12,520 | [1] | 743,199 |
Capital expenditures |  |  |  |  |  | (788,642) |  | (1,032,588) |
Acquisition of proved and unproved oil and gas properties |  |  |  |  |  | (2,581) |  | (24,571) |
Net cash used in investing activities |  |  |  |  |  | (778,703) |  | (313,960) |
Cash flows from financing activities: |  |  |  |  |  |  |  |  |
Proceeds from credit facility |  |  |  |  |  | 1,124,500 |  | 0 |
Repayment of credit facility |  |  |  |  |  | (995,500) |  | 0 |
Net proceeds from Senior Notes |  |  |  |  |  | 0 |  | 492,079 |
Cash paid to repurchase Senior Notes, including premium |  |  |  |  |  | 0 |  | (844,984) |
Net proceeds from sale of common stock |  |  |  |  |  | 1,959 |  | 1,881 |
Dividends paid |  |  |  |  |  | (5,612) |  | (5,584) |
Other, net |  |  |  |  |  | (2,684) |  | (7,746) |
Net cash provided by (used in) financing activities |  |  |  |  |  | 122,663 |  | (364,354) |
Net change in cash, cash equivalents, and restricted cash |  |  |  |  |  | (74,454) |  | (137,137) |
Cash, cash equivalents, and restricted cash at beginning of period |  |  | $ 77,965 |  | $ 313,943 | 77,965 |  | 313,943 | $ 313,943
Cash, cash equivalents, and restricted cash at end of period | 3,511 |  |  | 176,806 |  | 3,511 |  | 176,806 | 77,965
Supplemental Cash Flow Information - Operating activities: |  |  |  |  |  |  |  |  |
Cash paid for interest, net of capitalized interest |  |  |  |  |  | (113,122) |  | (124,435) |
Net cash paid for income taxes |  |  |  |  |  | (1,469) |  | (9,085) |
Supplemental Cash Flow Information - Investing activities: |  |  |  |  |  |  |  |  |
Changes in capital expenditure accruals and other |  |  |  |  |  | 34,878 |  | 19,811 |
Supplemental Cash Flow Information - non-cash investing activities: |  |  |  |  |  |  |  |  |
Carrying value of properties exchanged |  |  |  |  |  | 70,808 |  | 95,121 |
Supplemental Cash Flow Information - non-cash financing activities: |  |  |  |  |  |  |  |  |
Non-cash loss on extinguishment of debt, net |  |  |  |  |  | 0 |  | 6,334 |
Reconciliation of cash, cash equivalents, and restricted cash: |  |  |  |  |  |  |  |  |
Cash and cash equivalents | 10 |  |  | 176,806 |  | 10 |  | 176,806 | $ 77,965
Restricted cash | $ 3,501 | [1] |  | $ 0 |  | $ 3,501 | [1] | $ 0 |
[1] | (1) As of September 30, 2019, a portion of net proceeds from the sale of oil and gas properties was restricted for future property acquisitions. Restricted cash is included in the other noncurrent assets line item on the accompanying unaudited condensed consolidated balance sheets (“accompanying balance sheets”).

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- Definition The net book value of a nonmonetary asset transferred or exchanged in connection with the acquisition of a business or asset in a noncash transaction. Noncash is defined as transactions during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. Nonmonetary assets and liabilities are assets and liabilities that will not result in cash receipts or cash payments in the future. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4313-108586 + Details
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- Definition Amount of income (expense) included in net income that results in no cash inflow (outflow), classified as other. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 + Details
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- Definition Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity. + 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 (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585 + Details
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- Definition The cash outflow to purchase long lived physical asset for use in the normal oil and gas operations and to purchase mineral interests in oil and gas properties not intended for resale. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585 + Details
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- Definition The cash outflow for exploration and development of oil and gas properties. It includes cash payments related to development of oil and gas wells drilled at previously untested geologic structures (to determine the presence of oil or gas) and wells drilled at sites where the presence of oil or gas has already been established (to extract the oil or gas). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585 + Details
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- Definition The cash inflow from the additional capital contribution to the entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585 + Details
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- Definition Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Amount of cash inflow (outflow) from financing activities classified as other. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585 + Details
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- Definition The cash inflow to dispose of long-lived, physical assets and mineral interests in oil and gas properties used for normal oil and gas operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585 + Details
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- Definition Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. + 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=118932676&loc=d3e3291-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Amount of cash restricted as to withdrawal or usage, classified as noncurrent. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118951113&loc=d3e6812-107765 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(17)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=98513485&loc=SL98516268-108586 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 954 -SubTopic 210 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=116631420&loc=SL116631458-115580 + Details
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- Definition Depreciation, depletion, amortization, and accretion related to oil and gas producing activities. + References No definition available. + Details
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- Definition Amount of noncash expense for share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 + Details
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