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Other Financial Information (Noncash Operating Working Capital (Increase) Decrease) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Other Financial Information [Abstract] |  |  |
(Increase) decrease in accounts receivable | $ (112,673) | $ 4,227 |
Decrease in inventories | 3,930 | 15,637 |
(Increase) decrease in prepaid expenses | (10,763) | 3,446 |
Increase (decrease) in accounts payable and accrued liabilities | 21,131 | (26,908) |
Increase (decrease) in income taxes payable | (130) | 45 |
Net (increase) decrease in noncash operating working capital | (98,505) | (3,553) | [1]
Cash income taxes paid, net of refunds |  | (1,104) |
Interest paid, net of amounts capitalized of $0 in 2019 and 2018 | 39,024 | 35,158 |
Asset retirement costs capitalized | 486 | 727 |
(Increase) decrease in capital expenditure accrual | (63,328) | (17,592) |
Interest paid, amounts capitalized | $ 0 | $ 0 |
[1] | Reclassified to conform to current presentation (see Note A).

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- Definition The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4297-108586 + Details
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- Definition The increase (decrease) during the reporting period in the amounts payable to vendors for goods and services received and the amount of obligations and expenses incurred but not 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=98514028&loc=d3e3602-108585 + Details
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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=98514028&loc=d3e3602-108585 + Details
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