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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2016 | Jun. 30, 2015
Cash flows from operating activities: |  |
Net loss | $ (156,369) | $ (9,850)
Adjustments to reconcile net loss to net cash provided by operating activities: |  |
Depreciation, depletion, amortization and impairment | 347,745 | 357,306
Dry holes and abandonments |  | 114
Deferred income tax benefit | (58,643) | (40,225)
Stock-based compensation expense | 14,192 | 13,831
Net gain on asset disposals | (7,267) | (5,914)
Tax expense on stock-based compensation | (2,995) |
Amortization of debt issuance costs | 723 | 522
Changes in operating assets and liabilities: |  |
Accounts receivable | 91,559 | 330,176
Income taxes receivable/payable | (2,329) | 93,527
Inventory and other assets | 3,795 | 11,555
Accounts payable | (25,738) | (108,424)
Accrued expenses | (21,658) | (1,894)
Other liabilities | (1,088) | (63)
Net cash provided by operating activities | 181,927 | 640,661
Cash flows from investing activities: |  |
Purchases of property and equipment | (51,834) | (463,633)
Proceeds from disposal of assets | 12,350 | 10,728
Net cash used in investing activities | (39,484) | (452,905)
Cash flows from financing activities: |  |
Purchases of treasury stock | (3,611) | (8,010)
Dividends paid | (17,665) | (29,352)
Tax benefit related to stock-based compensation |  | 1,129
Debt issuance costs |  | (1,979)
Proceeds from long-term debt |  | 200,000
Repayment of long-term debt | (25,000) | (10,000)
Proceeds from borrowings under revolving credit facility |  | 54,000
Repayment of borrowings under revolving credit facility |  | (357,000)
Net cash used in financing activities | (46,276) | (151,212)
Effect of foreign exchange rate changes on cash | 114 | (3,050)
Net increase in cash and cash equivalents | 96,281 | 33,494
Cash and cash equivalents at beginning of period | 113,346 | 43,012
Cash and cash equivalents at end of period | 209,627 | 76,506
Net cash (paid) received during the period for: |  |
Interest, net of capitalized interest of $286 in 2016 and $3,343 in 2015 | (20,252) | (16,506)
Income taxes | 19,603 | 63,740
Non-cash investing and financing activities: |  |
Net increase (decrease) in payables for purchases of property and equipment | 9,283 | (50,487)
Net decrease in deposits on equipment purchases | $ 4,397 | $ 64,638

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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 -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: 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=66902209&loc=d3e3213-108585 + Details
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- Definition The cash inflow from a debt initially having maturity 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=66902209&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + 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=66902209&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + 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=66902209&loc=d3e3179-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 + Details
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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal 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=66902209&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + 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 -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: 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=66902209&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=66902209&loc=d3e3602-108585 + Details
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