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CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) | 6 Months Ended
--- | ---
Jun. 30, 2018 | Jun. 30, 2017
Operating activities: |  |
Net (loss) income | $ (30,598,000) | $ 239,661,000
Adjustments to reconcile net (loss) income to net cash provided from operating activities: |  |
Deferred income tax expense | 14,158,000 | 170,046,000
Depletion, depreciation and amortization and impairment | 345,906,000 | 302,325,000
Exploration dry hole costs | 2,000 | 161,000
Abandonment and impairment of unproved properties | 66,695,000 | 9,613,000
Derivative fair value loss (income) | 117,299,000 | (276,752,000)
Cash settlements on derivative financial instruments | (5,350,000) | (794,000)
Allowance for bad debts | (1,500,000) | 300,000
Amortization of deferred financing costs and other | 2,376,000 | 2,557,000
Deferred and stock-based compensation | 34,167,000 | 1,952,000
Gain on the sale of assets | (179,000) | (23,407,000)
Changes in working capital: |  |
Accounts receivable | (14,425,000) | (13,610,000)
Inventory and other | 796,000 | 3,716,000
Accounts payable | 14,615,000 | 18,426,000
Accrued liabilities and other | 1,553,000 | (22,866,000)
Net cash provided from operating activities | 545,515,000 | 411,328,000
Investing activities: |  |
Additions to natural gas and oil properties | (584,432,000) | (469,644,000)
Additions to field service assets | (1,863,000) | (2,966,000)
Acreage purchases | (37,900,000) | (37,987,000)
Proceeds from disposal of assets | 366,000 | 27,288,000
Purchases of marketable securities held by the deferred compensation plan | (27,271,000) | (19,665,000)
Proceeds from the sales of marketable securities held by the deferred compensation plan | 25,459,000 | 21,356,000
Net cash used in investing activities | (625,641,000) | (481,618,000)
Financing activities: |  |
Borrowings on credit facilities | 1,114,000,000 | 946,000,000
Repayments on credit facilities | (1,011,000,000) | (874,000,000)
Repayment of senior notes | 0 | (500,000)
Dividends paid | (9,960,000) | (9,914,000)
Debt issuance costs | (8,257,000) | 0
Taxes paid for shares withheld | (3,021,000) | (6,077,000)
Change in cash overdrafts | (7,318,000) | 10,839,000
Proceeds from the sales of common stock held by the deferred compensation plan | 5,649,000 | 4,148,000
Net cash provided from financing activities | 80,093,000 | 70,496,000
(Decrease) increase in cash and cash equivalents | (33,000) | 206,000
Cash and cash equivalents at beginning of period | 448,000 | 314,000
Cash and cash equivalents at end of period | $ 415,000 | $ 520,000

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- Definition The cash inflow associated with the aggregate amount received by the entity through sale or maturity of marketable securities (held-to-maturity or available-for-sale) during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=82896770&loc=d3e26853-111562 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3179-108585 + Details
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- Definition The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3179-108585 + Details
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- Definition Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130534-203044 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.5) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130543-203045 + 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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 + Details
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- Definition The cash outflow for a long-term debt where the holder has highest claim on the entity's asset in case of bankruptcy or liquidation during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 + Details
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- Definition Dry hole costs from oil and gas producing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 360 -Section 25 -Paragraph 9 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=96866604&loc=d3e64954-109465 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 23 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e62136-109447 + Details
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