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Stock-based Compensation (Details) (USD $) | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended |  | 9 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2012 | Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2012 Stock Options [Member] | Jun. 30, 2012 SSARs / Stock Options [Member] | Jun. 30, 2012 SSARs / Stock Options [Member] | Jun. 30, 2012 Nonvested Stock Awards [Member] | Sep. 30, 2011 Nonvested Stock Awards [Member] | Jun. 30, 2012 Performance Shares [Member] | Jun. 30, 2012 Nonvested Stock Awards and Performance Shares [Member] | Jun. 30, 2012 Nonvested Stock Awards and Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total stock-based compensation included in general and administrative expenses | $ 700,000 |  |  |  |  |  |  |  |  |  |
Total stock-based compensation included in general and administrative expenses, net of tax | 500,000 |  |  |  |  |  |  |  |  |  |
Number of shares surrendered by emloyees (shares) |  | 12,553 | 39,861 |  |  |  |  |  |  |  |
Aggregate value of shares surrendered |  | 34,000 | 163,000 |  |  |  |  |  |  |  |
Intrinsic value of SSAR/stock options outstanding |  |  |  |  | 600,000 | 600,000 |  |  |  |  |
Aggregate intrinsic value of SSARs/stock options vested and expected to vest |  |  |  |  | 600,000 | 600,000 |  |  |  |  |
SSARs/stock options weighted average expected life (years) |  |  |  |  |  | 2 years 10 months 24 days |  |  |  |  |
Unrecognized compensation costs related to non-vested stock awards |  |  |  |  |  |  | 2,800,000 | 4,000,000 |  |  |
Weighted average period to recognize remaining cost (years) |  |  |  |  |  |  | 1 year 6 months |  |  |  |
Increase in target number of Performance Shares (percent) |  |  |  |  |  |  |  |  | 50.00% |  |
Non-vested stock performance period (years) |  |  |  |  |  |  |  |  | 3 years |  |
Expected dividend yield on performance shares (percent) |  |  |  |  |  |  |  |  | 0.00% |  |
Expected volatility rate range minimum (percent) |  |  |  |  |  |  |  |  | 36.00% |  |
Expected volatility rate range maximum (percent) |  |  |  |  |  |  |  |  | 61.10% |  |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions [Abstract] |  |  |  |  |  |  |  |  |  |  |
Expected life of options |  |  |  | 5 years |  |  |  |  |  |  |
Expected volatility |  |  |  | 44.77% |  |  |  |  |  |  |
Expected discrete dividends |  |  |  | $ 0 |  |  |  |  |  |  |
Weighted average risk-free interest rate |  |  |  | 0.90% |  |  |  |  | 0.43% |  |
Weighted average fair value |  |  |  | $ 0.86 |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Outstanding [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Shares outstanding at beginning of period (shares) |  |  |  |  | 2,281,684 | 1,876,238 |  |  |  |  |
Granted (shares) |  |  |  |  | 0 | 547,536 |  |  |  | 29,419 | 899,565
Expired (shares) |  |  |  |  | (7,437) | (54,740) |  |  |  |  |
Forfeited (shares) |  |  |  |  | (84,637) | (179,424) |  |  |  |  |
Shares outstanding at end of period (shares) |  |  |  |  | 2,189,610 | 2,189,610 |  |  |  |  |
Exercisable at end of period |  |  |  |  | 1,081,992 | 1,081,992 |  |  |  |  |
Vested or expected to vest in the future (shares) |  |  |  |  | 2,177,069 | 2,177,069 |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Outstanding, Weighted Average Exercise Price [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Weighted average exercise price of shares outstanding at beginning of period |  |  |  |  | $ 7.96 | $ 9.77 |  |  |  |  |
Weighted average exercise price of shares granted |  |  |  |  | $ 0.00 | $ 2.16 |  |  |  |  |
Weighted average exercise price of shares expired |  |  |  |  | $ 4.87 | $ 16.50 |  |  |  |  |
Weighted average exercise price of shares forfeited |  |  |  |  | $ 4.65 | $ 4.82 |  |  |  |  |
Weighted average exercise price of shares outstanding at beginning of period |  |  |  |  | $ 8.10 | $ 8.10 |  |  |  |  |
Weighted average exercise price of shares exercisable at end of period |  |  |  |  | $ 12.85 | $ 12.85 |  |  |  |  |
Weighted average exercise price of shares vested or expected to vest in the future |  |  |  |  | $ 8.12 | $ 8.12 |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Shares outstanding at beginning of period (shares) |  |  |  |  |  |  |  |  |  | 2,158,968 | 1,440,397
Granted (shares) |  |  |  |  | 0 | 547,536 |  |  |  | 29,419 | 899,565
Shares vested (shares) |  |  |  |  |  |  |  |  |  | (17,647) | (72,415)
Shares forfeited (shares) |  |  |  |  |  |  |  |  |  | (109,554) | (206,361)
Shares outstanding at end of period (shares) |  |  |  |  |  |  |  |  |  | 2,061,186 | 2,061,186
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Weighted average grant date fair value of shares outstanding at beginning of period |  |  |  |  |  |  |  |  |  | $ 4.45 | $ 6.77
Weighted average grant date fair value of shares granted |  |  |  |  |  |  |  |  | $ 1.13 | $ 3.00 | $ 1.44
Weighted average grant date fair value of shares vested in period |  |  |  |  |  |  |  |  |  | $ 34.00 | $ 21.23
Weighted average grant date fair value of shares forfeited in period |  |  |  |  |  |  |  |  |  | $ 9.02 | $ 6.86
Weighted average grant date fair value of shares outstanding at end of period |  |  |  |  |  |  |  |  |  | $ 3.93 | $ 3.93

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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 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph g(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: 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 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: 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=6793087&loc=d3e301413-122809 + Details
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- Definition The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units. + 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)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(2)(b) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(2)(a) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + 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)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(2)(d) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. + 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)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(2)(d) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + 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)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph e(2)(c) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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.D.2) -URI http://asc.fasb.org/extlink&oid=6793087&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 2 -Subparagraph (f)(2)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section D -Subsection 2 + Details
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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + 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)(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph e(2)(b) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The estimated measure of the maximum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References No definition available. + Details
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- Definition The estimated measure of the minimum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References No definition available. + Details
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. + 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)(iv) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph e(2)(d) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Disclosure of the weighted average expected dividend for an entity using a valuation technique with different dividend rates during the contractual term. + 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)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph e(2)(c) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph c(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition For net-share settlement of share-based awards when the employer settles employees' income tax withholding obligations, this element represents the number of shares the employees use to repay the employer. + References No definition available. + Details
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