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Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Supplemental Cash Flow Information [Abstract] |  |  |
Income taxes (net of refunds of $21,459, $17,522 and $9,270 in 2018, 2017 and 2016, respectively) | $ 157,758 | $ 320,222 | $ 143,404
Income taxes, refunds | 21,459 | 17,522 | 9,270
Interest (net of capitalization) | 49,762 | 61,243 | 96,948
Capital expenditures included in Accounts payable | $ 134,784 | $ 89,188 | $ 33,622

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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://fasb.org/us-gaap/role/ref/legacyRef -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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