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Basis of Presentation, Significant Accounting Polices and Practicies and Recent Accounting Pronouncements (Policies) | 3 Months Ended
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Dec. 31, 2014
Accounting Policies [Abstract] |
New Accounting Pronouncements and Changes in Accounting Principles [Text Block] | Share-Based Payments When a Performance Target is Achieved after the Requisite Service Period In June 2014, the Financial Accounting Standards Board issued new guidance on Stock Compensation (ASU 2014-12, Accounting for Share-Based Payments When the Term of an Award Provide that a Performance Target Could Be Achieved after the Requisite Service Period), effective for fiscal years beginning after December 15, 2015 and interim periods within those years. The new guidance requires that performance targets that affect vesting and that could be achieved after the requisite service period to be treated as performance conditions. Such performance targets would not be included in the grant-date fair value calculation of the award, rather compensation cost should be recorded when it is probable the performance target will be reached and should represent the compensation cost attributable to period(s) for which the requisite service has already been rendered. This standard may be early adopted and the amendments in this accounting standards update may be applied either prospectively or retrospectively. The Company will not early adopt this standard and is currently evaluating the impact of this new accounting guidance on its consolidated financial statements.
Oil and natural gas properties | Oil and natural gas properties Ceiling Test For the three months ended December 31, 2014, Compass recognized an impairment of $190.0 to its proved oil and natural gas properties. As further discussed in Note 3, Acquisitions, the change in control resulting from the acquisition of EXCO's remaining interest in Compass triggered the remeasurement of the Company's initial basis in Compass at fair value which increased the Compass' full cost pool. The purchase price for the acquisition was based on both the income and market approach models which incorporate, among other things, market prices based on the New York Mercantile Exchange ("NYMEX") futures as of the acquisition date, which the Company believes reflects an independent proxy point for determining fair value. The ceiling test, however, requires companies using the full cost accounting method to price period-ending proved reserves using the simple average spot price for the trailing 12 month period, which may not be indicative of actual market values. As a result, Compass' full cost pool exceeded its ceiling test limitation at December 31, 2014 resulting in an impairment. For the three months ended December 31, 2013 the ceiling test did not result in an impairment to Compass' oil and natural gas properties. As a result of recent decline in oil and natural gas prices, Compass expects to incur additional impairments to its oil and natural gas properties in fiscal year 2015 if prices do not increase. The ceiling test is computed using the simple average spot price for the trailing 12 month period using the first day of each month. As of December 31, 2014, the trailing 12 month reference prices were $4.35 per Million British Thermal Units ("Mmbtu") for natural gas at Henry Hub ("HH"), and $94.99 per barrel ("Bbl") of oil for West Texas Intermediate at Cushing, Oklahoma. Each of the reference prices for oil and natural gas are further adjusted for quality factors and regional differentials to derive estimated future net revenues. The price used for natural gas liquids was $42.55 per Bbl and was based on the trailing 12 month average of realized prices. Under full cost accounting rules, any ceiling test impairments of oil and natural gas properties may not be reversed in subsequent periods. Since Compass does not designate its derivative financial instruments as hedging instruments, Compass is not allowed to use the impacts of the derivative financial instruments in the ceiling test computations. The ceiling test calculation and impairment evaluation are based upon estimates of proved reserves. There are numerous uncertainties inherent in estimating quantities of proved reserves, in projecting the future rates of production and in the timing of development activities. The accuracy of any reserve estimate is a function of the quality of available data and of engineering and geological interpretation and judgment. Results of drilling, testing and production subsequent to the date of the estimate may justify revision of such estimate. Accordingly, reserve estimates are often different from the quantities of oil, natural gas and natural gas liquids that are ultimately recovered.

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- Definition The entire disclosure of changes in accounting principles, including adoption of new accounting pronouncements, that describes the new methods, amount and effects on financial statement line items. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6372559&loc=d3e765-108305 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 01 -Paragraph b -Subparagraph 6 -Article 10 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=28359718&loc=d3e22499-107794 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=28359718&loc=d3e22580-107794 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Direct Effects of a Change in Accounting Principle -URI http://asc.fasb.org/extlink&oid=6510796 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Indirect Effects of a Change in Accounting Principle -URI http://asc.fasb.org/extlink&oid=6515603 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Accounting Change -URI http://asc.fasb.org/extlink&oid=6503790 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Change in Accounting Principle -URI http://asc.fasb.org/extlink&oid=6507316 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.10-01.(b)(6)) -URI http://asc.fasb.org/extlink&oid=27015980&loc=d3e46468-122699 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Retrospective Application -URI http://asc.fasb.org/extlink&oid=6523989 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=28359718&loc=d3e22583-107794 Reference 12: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6372559&loc=d3e725-108305 + Details
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- Definition Disclosure of accounting policy for oil and gas property which may include the basis of such assets, depreciation methods used and estimated useful lives, the entity's capitalization policy, including its accounting treatment for costs incurred for repairs and maintenance activities, whether such asset balances include capitalized interest and the method by which such is calculated, how disposals of such assets are accounted for and how impairment of such assets is assessed and recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367646&loc=d3e18780-107790 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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