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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Cash flows from operating activities: |  |
Net loss | $ (34,417) | $ (63,539)
Adjustments to reconcile net loss to net cash provided by operating activities: |  |
Depreciation, depletion, amortization and impairment | 209,892 | 156,217
Dry holes and abandonments | 96 |
Deferred income tax expense (benefit) | 282 | (36,947)
Stock-based compensation expense | 9,365 | 7,131
Net gain on asset disposals | (10,410) | (13,560)
Amortization of debt discount and issuance costs | 170 | 87
Changes in operating assets and liabilities: |  |
Accounts receivable | (16,468) | (62,291)
Income taxes receivable | 19 | 248
Inventory and other assets | 2,709 | 9,931
Accounts payable | (22,514) | 11,252
Accrued expenses | 11,174 | (3,233)
Other liabilities | 67 | 261
Net cash provided by operating activities | 149,965 | 5,557
Cash flows from investing activities: |  |
Acquisition | (3,800) |
Purchases of property and equipment | (122,921) | (68,440)
Proceeds from disposal of assets | 10,294 | 25,861
Net cash used in investing activities | (116,427) | (42,579)
Cash flows from financing activities: |  |
Proceeds of equity offering |  | 471,570
Purchases of treasury stock | (16,928) |
Proceeds from exercise of options | 485 |
Dividends paid | (4,443) | (3,326)
Debt issuance costs | (4,198) |
Proceeds from long-term debt | 521,194 |
Proceeds from borrowings under revolving credit facility | 79,000 | 10,000
Repayment of borrowings under revolving credit facility | (347,000) | (10,000)
Net cash provided by financing activities | 228,110 | 468,244
Effect of foreign exchange rate changes on cash | (225) | 234
Net increase in cash and cash equivalents | 261,423 | 431,456
Cash and cash equivalents at beginning of period | 42,828 | 35,152
Cash and cash equivalents at end of period | 304,251 | 466,608
Net cash (paid) received during the period for: |  |
Interest, net of capitalized interest of $340 in 2018 and $155 in 2017 | (2,206) | (634)
Income taxes | 21 | 248
Non-cash investing and financing activities: |  |
Receivable from property and equipment insurance | 15,000 |
Net increase in payables for purchases of property and equipment | 62,488 | 21,297
Net increase in deposits on equipment purchases | $ (2,294) | $ (3,056)

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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 cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services 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 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3179-108585 + Details
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Period Type: | duration

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- Definition Amount of cash inflow from exercise of stock options granted under share-based compensation arrangement. + 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 (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=96867065&loc=SL79508275-113901 + 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 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://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 + Details
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