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Retirement Plan and Incentive Awards (Tables) | 12 Months Ended
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Sep. 30, 2014
Retirement Plan and Incentive Awards [Abstract] |
Schedule of Assumptions for Stock Options Granted During Period | The fair value of each grant is estimated on the date of grant using the Black-Scholes option-pricing model. We used the following weighted-average assumptions for options granted::
| 2014 |  | 2013 |  | 2012
Expected life of options | 5.1 years |  |  | 5.0 years |  |  | 5.0 years |
Expected volatility | 45.99 | % |  | 46.15 | % |  | 44.77 | %
Expected discrete dividends | — |  |  | — |  |  | — |
Weighted average risk-free interest rate | 1.42 | % |  | 0.63 | % |  | 0.90 | %
Weighted average fair value | $ | 7.97 |  |  | $ | 5.48 |  |  | $ | 4.30 |
Schedule of Stock Options and SSARs Outstanding, and Related Activity | The following table summarizes stock options and SSARs outstanding as of September 30 and activity during the fiscal years ended September 30:
| 2014 |  | 2013 |  | 2012
| Shares |  | Weighted- Average Exercise Price |  | Shares |  | Weighted- Average Exercise Price |  | Shares |  | Weighted- Average Exercise Price
Outstanding at beginning of period | 560,784 |  |  | $ | 33.01 |  |  | 429,973 |  |  | $ | 48.80 |  |  | 375,248 |  |  | $ | 48.85 |
Granted | 161,010 |  |  | 19.11 |  |  | 160,651 |  |  | 13.56 |  |  | 109,507 |  |  | 10.80 |
Exercised | (2,788 | ) |  | 14.29 |  |  | (681 | ) |  | 10.80 |  |  | — |  |  | — |
Expired | (55,811 | ) |  | 170.32 |  |  | (22,914 | ) |  | 47.65 |  |  | (10,948 | ) |  | 82.51 |
Forfeited | (12,972 | ) |  | 19.85 |  |  | (6,245 | ) |  | 17.93 |  |  | (43,834 | ) |  | 24.13 |
Outstanding at end of period | 650,223 |  |  | $ | 18.12 |  |  | 560,784 |  |  | $ | 33.01 |  |  | 429,973 |  |  | $ | 48.80 |
Exercisable at end of period | 355,703 |  |  | $ | 19.74 |  |  | 310,120 |  |  | $ | 48.73 |  |  | 247,588 |  |  | $ | 58.61 |
Vested or expected to vest in the future | 649,773 |  |  | $ | 18.12 |  |  | 558,519 |  |  | $ | 33.09 |  |  | 428,597 |  |  | $ | 40.88 |
Schedule of Stock Options and SSARS Outstanding and Exercisable | The following table summarizes information about stock options and SSARs outstanding and exercisable at September 30, 2014:
|  | Stock Options/SSARs Outstanding |  | Stock Options/SSARs Exercisable
Range of Exercise Price |  | Number Outstanding |  | Weighted Average Contractual Remaining Life (Years) |  | Weighted Average Exercise Price |  | Number Exercisable |  | Weighted Average Contractual Remaining Life (Years) |  | Weighted Average Exercise Price
$1 - $15 |  | 255,747 |  |  | 5.71 |  | $ | 12.28 |  |  | 120,644 |  |  | 5.54 |  | $ | 11.85 |
$16 - $20 |  | 250,826 |  |  | 5.23 |  | 19.30 |  |  | 92,224 |  |  | 1.99 |  | 19.61 |
$21-$75 |  | 143,660 |  |  | 2.85 |  | 26.48 |  |  | 142,835 |  |  | 2.83 |  | 26.44 |
$1-$75 |  | 650,233 |  |  | 2.88 |  | $ | 18.12 |  |  | 355,703 |  |  | 3.02 |  | $ | 19.74 |
Schedule of Nonvested Stock Awards and Performance Shares | Activity relating to nonvested stock awards, including the Performance Shares for the fiscal years ended September 30, 2014, 2013 and 2012 is as follows:
| Year Ended September 30, 2014 |  | Year Ended September 30, 2013 |  | Year Ended September 30, 2012
| Shares |  | Weighted Average Grant Date Fair Value |  | Shares |  | Weighted Average Grant Date Fair Value |  | Shares |  | Weighted Average Grant Date Fair Value
Beginning of period | 280,416 |  |  | $ | 12.32 |  |  | 323,335 |  |  | $ | 19.61 |  |  | 288,079 |  |  | $ | 33.85 |
Granted | 595,567 |  |  | 18.68 |  |  | 99,413 |  |  | 10.95 |  |  | 179,913 |  |  | 7.19 |
Vested | (113,320 | ) |  | 22.55 |  |  | (126,124 | ) |  | 27.59 |  |  | (88,497 | ) |  | 34.20 |
Forfeited | (16,096 | ) |  | 15.93 |  |  | (16,208 | ) |  | 30.57 |  |  | (56,160 | ) |  | 29.97 |
End of period | 746,567 |  |  | $ | 15.76 |  |  | 280,416 |  |  | $ | 12.32 |  |  | 323,335 |  |  | $ | 19.61 |

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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for stock options and stock appreciation rights that were outstanding at the beginning and end of the year, exercisable at the end of the year, and the number of stock options and stock appreciation rights that were granted, exercised or converted, forfeited, and expired during the year. + 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)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + 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 (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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