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Retirement Plan and Incentive Awards - Schedule of Stock Options and SSARs Outstanding and Related Activity (Details) (SSARs and Stock Options, USD $) | 12 Months Ended
--- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2012
SSARs and Stock Options |  |  |
Shares [Roll Forward] |  |  |
Outstanding at beginning of period | 560,784 | 429,973 | 375,248
Granted | 161,010 | 160,651 | 109,507
Exercised | (2,788) | (681) | 0
Expired | (55,811) | (22,914) | (10,948)
Forfeited | (12,972) | (6,245) | (43,834)
Outstanding at end of period | 650,223 | 560,784 | 429,973
Exercisable at end of period | 355,703 | 310,120 | 247,588
Vested or expected to vest in the future | 649,773 | 558,519 | 428,597
Weighted-Average Exercise Price [Roll Forward] |  |  |
Outstanding at beginning of period | $ 33.01 | $ 48.80 | $ 48.85
Granted | $ 19.11 | $ 13.56 | $ 10.80
Exercised | $ 14.29 | $ 10.80 | $ 0.00
Expired | $ 170.32 | $ 47.65 | $ 82.51
Forfeited | $ 19.85 | $ 17.93 | $ 24.13
Outstanding at end of period | $ 18.12 | $ 33.01 | $ 48.80
Exercisable at end of period | $ 19.74 | $ 48.73 | $ 58.61
Vested or expected to vest in the future | $ 18.12 | $ 33.09 | $ 40.88

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- Definition Share Based Compensation Arrangement By Share Based Payment Award, Ssars And Options, Exercisable Number + References No definition available. + Details
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- Definition As of the balance sheet date, the number of shares into which fully vested and expected to vest SSARs and stock options outstanding can be converted under the plan. + References No definition available. + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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