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Statements of Condensed Consolidated Cash Flows (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2012 | Mar. 31, 2011
Cash flows from operating activities: |  |
Net income | $ 72,035 | $ 122,255
Adjustments to reconcile net income to cash provided by operating activities: |  |
Provision for losses on accounts receivable | 196 | 2,717
Depreciation, depletion, and amortization | 107,525 | 78,398
Unrealized losses on derivatives and inventory | 5,484 | 896
Other income | (2,469) | (4,446)
Gain on dispositions | (1,110) | (22,785)
Equity in earnings of nonconsolidated investments | (2,212) | (2,358)
Equity award expense | 8,256 | 3,998
Deferred income taxes | 39,363 | 70,716
Changes in other assets and liabilities: |  |
Dividend from Nora Gathering LLC | 3,000 | 15,000
Inventory | 55,628 | 67,245
Accounts receivable and unbilled revenues | 36,251 | 14,573
Accounts payable | (55,969) | (41,108)
Other assets and liabilities | (43,854) | (62,587)
Net cash provided by operating activities | 222,124 | 242,514
Cash flows from investing activities: |  |
Capital expenditures | (269,587) | (263,428)
Proceeds from sale of available-for-sale investments |  | 14,028
Proceeds from sale of assets | 2,391 | 230,525
Net cash used in investing activities | (267,196) | (18,875)
Cash flows from financing activities: |  |
Dividends paid | (32,938) | (32,886)
Decrease in short-term loans |  | (53,650)
Repayments and retirements of long-term debt | (9,532) |
Proceeds and tax benefits from exercises under employee compensation plans | 1,499 | 1,525
Net cash used in financing activities | (40,971) | (85,011)
Net (decrease) increase in cash and cash equivalents | (86,043) | 138,628
Cash and cash equivalents at beginning of period | 831,251 |
Cash and cash equivalents at end of period | 745,208 | 138,628
Cash paid during the period for: |  |
Interest, net of amount capitalized | 13,044 | 10,791
Income taxes, net | $ 2,214 | $ 29

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- Definition Includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits are not generally reported as cash and cash equivalents. Includes cash and cash equivalents associated with the entity's continuing operations. Excludes cash and cash equivalents associated with the disposal group (and discontinued operation). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 1 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 7 -Footnote 1 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3044-108585 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 8, 9 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6361293&loc=d3e6676-107765 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 7, 26 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 + Details
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