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SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2015
Cash payments: |  |  |
Interest paid, net of amounts capitalized | $ 22,936 | $ 28,011 | $ 11,651
Income taxes paid | 3,749 | 15,577 | 131,128
Reconciliation of total capital expenditures incurred to total capital expenditures in the consolidated statements of cash flows |  |  |
Capital expenditures incurred | 408,106 | 241,290 | 1,033,241
Additions incurred in prior year but paid for in current period | 9,465 | 25,344 | 123,548
Additions incurred but not paid for as of the end of the period | (20,004) | (9,465) | (25,344)
Capital expenditures per Consolidated Condensed Statements of Cash Flows | $ 397,567 | $ 257,169 | $ 1,131,445

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- Definition Future cash outflow to pay for purchases of fixed assets that have occurred. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4313-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586 + Details
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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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