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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Operating activities: |  |  |
Net income (loss) | $ 333,146,000 | $ (521,388,000) | $ (713,685,000)
Adjustments to reconcile net income (loss) to net cash provided from operating activities: |  |  |
Deferred income tax benefit | (251,043,000) | (280,848,000) | (338,706,000)
Depletion, depreciation and amortization and impairment | 688,671,000 | 567,142,000 | 1,171,329,000
Exploration dry hole and impairment costs | 9,172,000 | 18,000 | 88,000
Abandonment and impairment of unproved properties | 269,725,000 | 30,076,000 | 47,619,000
Derivative fair value (income) loss | (213,350,000) | 261,391,000 | (416,364,000)
Cash settlements on derivative financial instruments | 13,117,000 | 347,336,000 | 532,122,000
Allowance for bad debt | 1,550,000 | 800,000 | 2,300,000
Amortization of deferred financing costs, loss on extinguishment of debt and other | 5,445,000 | 7,170,000 | 29,383,000
Deferred and stock-based compensation | 30,706,000 | 74,685,000 | (20,411,000)
(Gain) loss on the sale of assets | (23,716,000) | 7,074,000 | 406,856,000
Changes in working capital: |  |  |
Accounts receivable | (102,866,000) | (20,586,000) | 64,704,000
Inventory and other | (2,979,000) | 6,220,000 | (14,868,000)
Accounts payable | 45,912,000 | (27,259,000) | (26,197,000)
Accrued liabilities and other | 12,764,000 | (64,763,000) | (32,768,000)
Net cash provided from operating activities | 816,254,000 | 387,068,000 | 691,402,000
Investing activities: |  |  |
Additions to natural gas and oil properties | (1,148,613,000) | (466,252,000) | (1,030,644,000)
Additions to field service assets | (5,710,000) | (3,052,000) | (4,441,000)
Acreage purchases | (58,213,000) | (43,482,000) | (74,880,000)
MRD Merger, net of cash acquired | 0 | 7,180,000 | 0
Other | 0 | 0 | (75,000)
Proceeds from disposal of assets | 72,468,000 | 193,755,000 | 890,901,000
Purchases of marketable securities held by the deferred compensation plan | (88,167,000) | (37,019,000) | (28,876,000)
Proceeds from the sales of marketable securities held by the deferred compensation plan | 89,178,000 | 40,035,000 | 29,243,000
Net cash used in investing activities | (1,139,057,000) | (308,835,000) | (218,772,000)
Financing activities: |  |  |
Borrowings on credit facilities | 2,041,000,000 | 2,274,000,000 | 2,271,000,000
Repayments on credit facilities | (1,712,000,000) | (1,487,000,000) | (2,899,000,000)
Issuance of senior notes | 0 | 0 | 750,000,000
Repayment of senior or senior subordinated notes | (500,000) | (273,012,000) | (516,875,000)
Dividends paid | (19,839,000) | (16,682,000) | (27,083,000)
Debt issuance costs | (403,000) | (6,342,000) | (14,156,000)
Taxes paid for shares withheld | (6,983,000) | (3,849,000) | (7,702,000)
Change in cash overdrafts | 17,180,000 | 18,393,000 | (37,089,000)
Proceeds from the sales of common stock held by the deferred compensation plan | 4,482,000 | 13,102,000 | 8,298,000
Net cash provided from (used in) financing activities | 322,937,000 | (78,390,000) | (472,607,000)
Increase (decrease) in cash and cash equivalents | 134,000 | (157,000) | 23,000
Cash and cash equivalents at beginning of year | 314,000 | 471,000 | 448,000
Cash and cash equivalents at end of year | 448,000 | 314,000 | 471,000
MRD |  |  |
Financing activities: |  |  |
Repayments on credit facilities | $ 0 | $ (597,000,000) | $ 0

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- Definition The cash outflow to purchase of mineral interests in oil and gas properties for use in the normal oil and gas operations and not intended for resale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + 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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + Details
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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + Details
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- Definition The cash inflow from a borrowing with the highest claim on the assets of the entity in case of bankruptcy or liquidation (with maturities initially due after one year or beyond 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 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585 + Details
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- Definition The cash inflow 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 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585 + Details
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- Definition The net cash inflow or outflow from the excess drawing from an existing cash balance, which will be honored by the bank but reflected as a loan to the drawer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3095-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3098-108585 + Details
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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 from the repayment of long-term borrowing where a lender is placed in a lien position behind debt having a higher priority of repayment (senior) in case of liquidation of the entity's assets or underlying collateral. + 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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