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Supplemental Cash Flow Information (Net Changes In Components Of Operating Assets And Liabilities) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
Supplemental Cash Flow Elements [Abstract] |  |
(Increase) decrease in Accounts receivable | $ 70,903 us-gaap_IncreaseDecreaseInAccountsReceivable | $ 60,046 us-gaap_IncreaseDecreaseInAccountsReceivable
(Increase) decrease in Inventories | (16,973)us-gaap_IncreaseDecreaseInInventories | (11,700)us-gaap_IncreaseDecreaseInInventories
Increase (Decrease) in Deferred Charges | 3,103 us-gaap_IncreaseDecreaseInDeferredCharges | 0 us-gaap_IncreaseDecreaseInDeferredCharges
(Increase) decrease in Other current assets | (4,722)us-gaap_IncreaseDecreaseInOtherCurrentAssets | 41,623 us-gaap_IncreaseDecreaseInOtherCurrentAssets
Increase (decrease) in Accounts payable | (37,826)us-gaap_IncreaseDecreaseInAccountsPayable | (1,867)us-gaap_IncreaseDecreaseInAccountsPayable
Increase (decrease) in Accrued liabilities | (2,343)us-gaap_IncreaseDecreaseInAccruedLiabilities | (35,184)us-gaap_IncreaseDecreaseInAccruedLiabilities
Net changes in components of operating assets and liabilities | $ 5,936 us-gaap_IncreaseDecreaseInOperatingCapital | $ 52,918 us-gaap_IncreaseDecreaseInOperatingCapital

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- Definition The increase (decrease) during the reporting period in the aggregate amount of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. + 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=31042434&loc=d3e3602-108585 + Details
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Period Type: | duration

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- Definition The increase (decrease) during the reporting period in amount due within one year (or one business cycle) from customers for the credit sale of goods and services. + 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=31042434&loc=d3e3602-108585 + Details
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- Definition The increase (decrease) during the reporting period in the aggregate amount of expenses incurred but not yet paid. + 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=31042434&loc=d3e3602-108585 + Details
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- Definition The increase (decrease) during the reporting period in the value of expenditures made during the current reporting period for benefits that will be received over a period of years. Deferred charges differ from prepaid expenses in that they usually extend over a long period of time and may or may not be regularly recurring costs of operation. + 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=31042434&loc=d3e3602-108585 + Details
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- Definition The increase (decrease) during the reporting period in the aggregate value of all inventory held by the reporting entity, associated with underlying transactions that are classified as operating activities. + 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=31042434&loc=d3e3602-108585 + Details
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- Definition The increase (decrease) during the reporting period of all assets and liabilities used in operating activities. + 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=31042434&loc=d3e3602-108585 + Details
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- Definition The increase (decrease) during the reporting period in other current operating assets not separately disclosed in the statement of cash flows. + References No definition available. + Details
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