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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2019 | Sep. 30, 2018
Cash flows from operating activities: |  |
Net income | $ 6,752 | $ 179,928
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Depreciation, depletion and amortization | 321,392 | 224,379
Stock-based compensation expense | 21,351 | 14,329
Impairment and abandonment expense | 42,427 | 10,396
Exploratory dry hole costs | 0 | 395
Deferred tax expense | 5,058 | 50,729
Net loss on sale of long-lived assets | 15 | 74
Non-cash portion of derivative (gain) loss | 14 | (579)
Amortization of debt issuance costs and discount | 2,070 | 1,258
Changes in operating assets and liabilities: |  |
(Increase) decrease in accounts receivable | (47,771) | (18,327)
(Increase) decrease in prepaid and other assets | (995) | (52)
Increase (decrease) in accounts payable and other liabilities | 34,562 | 32,165
Net cash provided by operating activities | 384,875 | 494,695
Cash flows from investing activities: |  |
Acquisition of oil and natural gas properties | (73,346) | (114,870)
Drilling and development capital expenditures | (644,945) | (723,100)
Purchases of other property and equipment | (8,207) | (4,409)
Proceeds from sales of oil and natural gas properties | 28,378 | 147,413
Net cash used in investing activities | (698,120) | (694,966)
Cash flows from financing activities: |  |
Proceeds from borrowings under revolving credit facility | 345,000 | 295,000
Repayment of borrowings under revolving credit facility | (525,000) | (155,000)
Proceeds from issuance of 2027 Senior Notes | 496,175 | 0
Debt issuance costs | (7,200) | (4,217)
Proceeds from stock options exercised | 0 | 847
Restricted stock used for tax withholdings | (911) | (1,119)
Net cash provided by financing activities | 308,064 | 135,511
Net decrease in cash, cash equivalents and restricted cash | (5,181) | (64,760)
Cash, cash equivalents and restricted cash, beginning of period | 21,422 | 125,915
Cash, cash equivalents and restricted cash, end of period | 16,241 | 61,155
Supplemental cash flow information |  |
Cash paid for interest | 27,985 | 15,587
Operating cash flows from operating leases | 16,808 | 0
Investing cash flows from operating leases | 13,946 | 0
Supplemental non-cash activity |  |
Accrued capital expenditures included in accounts payable and accrued expenses | 120,238 | 97,844
Asset retirement obligations incurred, including revisions to estimates | 1,075 | 1,040
Right-of-use assets obtained in exchange for operating lease liabilities | 35,686 | 0
Total cash, cash equivalents and restricted cash | $ 21,422 | $ 125,915

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- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669619-108580 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1B -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669625-108580 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4J -URI http://asc.fasb.org/extlink&oid=84234705&loc=SL4591551-111686 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3000-108585 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=108774443&loc=SL4569616-111683 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8933-108599 Reference 10: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4K -URI http://asc.fasb.org/extlink&oid=84234705&loc=SL4591552-111686 + Details
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- 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 + Details
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- Definition Amount of increase in right-of-use asset obtained in exchange for operating lease liability. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=77888399&loc=SL77918982-209971 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(2) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 + Details
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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 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=109223946&loc=d3e3602-108585 + Details
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- Definition The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period. + 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 (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 + Details
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