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CONSOLIDATED STATEMENT OF CASH FLOWS (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
CASH FLOWS FROM OPERATING ACTIVITIES |  |  |
Net income | $ 279,773 | $ 131,730 | $ 122,408
Adjustments to reconcile net income to cash provided by operating activities: |  |  |
Depreciation, depletion and amortization | 651,052 | 451,405 | 343,141
Deferred income tax expense | 138,380 | 80,929 | 74,744
(Gain) / loss on sale of assets | (21,351) | (50,635) | (63,382)
Exploration expense | 808 | 14,000 | 13,977
Unrealized (gain) / loss on derivative instruments |  | 494 | 965
Amortization of debt issuance costs | 3,693 | 5,265 | 4,381
Stock-based compensation, pension and other | 45,863 | 46,872 | 52,940
Changes in assets and liabilities: |  |  |
Accounts receivable, net | (49,398) | (58,037) | (19,893)
Income taxes | 29,002 | 3,055 | (27,345)
Inventories | (3,033) | 7,104 | 7,708
Other current assets | (428) | (1,198) | 1,143
Accounts payable and accrued liabilities | (22,908) | 18,843 | 8,546
Other assets and liabilities | (8,014) | 2,266 | (17,494)
Stock-based compensation tax benefit | (18,913) |  |
Net cash provided by operating activities | 1,024,526 | 652,093 | 501,839
CASH FLOWS FROM INVESTING ACTIVITIES |  |  |
Capital expenditures | (1,194,739) | (927,977) | (891,277)
Proceeds from sale of assets | 323,501 | 169,326 | 403,657
Restricted cash | (28,094) |  |
Investment in equity method investment | (18,875) | (6,863) |
Net cash used in investing activities | (918,207) | (765,514) | (487,620)
CASH FLOWS FROM FINANCING ACTIVITIES |  |  |
Borrowings from debt | 955,000 | 400,000 | 330,000
Repayments of debt | (895,000) | (263,000) | (355,000)
Treasury stock repurchases | (164,634) |  |
Dividends paid | (25,232) | (16,757) | (12,508)
Stock-based compensation tax benefit | 18,913 |  |
Capitalized debt issuance costs | (2,750) | (5,005) | (1,025)
Other | 48 | (992) | (1,724)
Net cash provided by / (used in) financing activities | (113,655) | 114,246 | (40,257)
Net increase / (decrease) in cash and cash equivalents | (7,336) | 825 | (26,038)
Cash and cash equivalents, beginning of period | 30,736 | 29,911 | 55,949
Cash and cash equivalents, end of period | $ 23,400 | $ 30,736 | $ 29,911

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- Definition The cash inflow to dispose of long lived physical asset and mineral interests in oil and gas properties used for the normal oil and gas operation and other Long-term assets. + References No definition available. + Details
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- Definition Amount of noncash expense included in interest expense to issue debt and obtain financing associated with the related debt instruments. Alternate captions include noncash interest expense. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 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 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 8 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 8 -Article 9 + Details
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- Definition Amount of cash inflow (outflow) of investing activities, excluding discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3574-108585 + Details
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- Definition Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1377-109256 + Details
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- Definition The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt. + 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 (e) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
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- Definition Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity. + 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 (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + 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=31042434&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 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=6474861&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=8451039&loc=d3e62136-109447 + 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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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