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Common Stock and Stock Compensation - Compensation Costs (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2013
Compensation costs included in net income |  |  |
Total gross compensation costs | $ 2,374 | $ 6,845 | $ 7,128
Total income tax benefits | 0 | (3,576) | (2,460)
Net compensation expense | 2,374 | 3,269 | 4,668
Phantom Share-Based Awards [Member] |  |  |
Compensation costs included in net income |  |  |
Total gross compensation costs | 3,932 | 0 | 0
Restricted Stock [Member] |  |  |
Compensation costs included in net income |  |  |
Total gross compensation costs | (1,558) | 6,845 | 7,128
Total income tax benefits | $ 0 | $ (3,576) | $ (2,460)

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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