Supplementary Information For Oil And Gas Producing Activities (Results Of Operations For Producing Activities) (Details) (USD $)
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12 Months Ended | |||||||
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Sep. 30, 2014
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Sep. 30, 2013
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Sep. 30, 2012
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Reserve Quantities [Line Items] | ||||||||
Operating Revenues | $ 813,259,000 | [1] | $ 663,073,000 | [1] | $ 488,562,000 | [1] | ||
Production/Lifting Costs | 165,534,000 | 119,243,000 | 83,361,000 | |||||
Franchise/Ad Valorem Taxes | 20,765,000 | 17,200,000 | 23,620,000 | |||||
Accretion Expense | 6,192,000 | 3,929,000 | 3,084,000 | |||||
Depreciation, Depletion and Amortization ($1.82, $1.98 and $2.19 per Mcfe of production) | 291,651,000 | 238,467,000 | 182,759,000 | |||||
Income Tax Expense | 140,484,000 | 120,431,000 | 81,904,000 | |||||
Results of Operations for Producing Activities (excluding corporate overheads and interest charges) | 188,633,000 | 163,803,000 | 113,834,000 | |||||
Revenues from sales to affiliates | 1,000 | 1,000 | 1,000 | |||||
Depreciation, Depletion and Amortization, per Mcfe of Production | 1.82 | 1.98 | 2.19 | |||||
Results of Operations, Sales or Transfers to Entity's Other Operations | 2,145,000 | 612,000 | 0 | |||||
Natural Gas [Member]
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Reserve Quantities [Line Items] | ||||||||
Natural Gas (includes revenues from sales to affiliates of $1 for all years presented and transfers to operations of $2,145, $612 and $0, respectively) | 515,080,000 | 371,311,000 | 181,544,000 | |||||
Oil, Condensate And Other Liquids [Member]
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Reserve Quantities [Line Items] | ||||||||
Operating Revenues | $ 298,179,000 | $ 291,762,000 | $ 307,018,000 | |||||
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