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Stock-Based Compensation (Details) (USD $) In Millions, except Share data, unless otherwise specified | 12 Months Ended |  | 12 Months Ended |  |  |  | 3 Months Ended |  |  |  |  |  | 0 Months Ended | 3 Months Ended | 12 Months Ended |  | 12 Months Ended
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Sep. 30, 2014 Restricted Stock | Sep. 30, 2013 Restricted Stock | Sep. 30, 2012 Restricted Stock | Dec. 31, 2013 Restricted Stock | Sep. 30, 2014 Stock Options | Sep. 30, 2013 Stock Options | Sep. 30, 2012 Stock Options | Sep. 30, 2011 Stock Options | Mar. 31, 2009 2007 Employee Stock Incentive Plan Stock-Based | Apr. 30, 2007 2007 Employee Stock Incentive Plan Stock-Based | Sep. 30, 2014 2007 Employee Stock Incentive Plan Stock Options | Jan. 31, 2008 1998 Employee Stock Option Plan Stock-Based | Jan. 01, 1998 1998 Employee Stock Option Plan Stock-Based | Sep. 30, 2014 1998 Employee Stock Option Plan Stock Options | Jul. 31, 2005 Non-Employee Directors Stock Option Plan Stock-Based | Mar. 31, 2009 Non-Employee Directors Stock Option Plan Stock-Based | Sep. 30, 1996 Non-Employee Directors Stock Option Plan Stock-Based | Sep. 30, 2014 Non-Employee Directors Stock Option Plan Stock Options | Sep. 30, 2014 Maximum Stock-Based | Sep. 30, 2014 Maximum Restricted Stock | Sep. 30, 2014 Maximum Stock Options | Sep. 30, 2014 Minimum Stock-Based | Sep. 30, 2014 Minimum Restricted Stock | Sep. 30, 2014 Minimum Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares available to grant |  |  |  |  | 1,042,492 |  |  |  |  | 500,000 | 850,892 | 500,000 | 50,000 | 0 |  |  |  | 191,600 |  |  |  |  |  |
Number of additional shares authorized |  |  |  |  |  |  |  |  | 1,800,000 |  |  |  |  |  |  | 300,000 |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, Share-based Compensation, Gross |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 200,000 |  | 100,000 |  |  |  |  |  |  |
Expiration period |  |  |  |  | 10 years |  |  |  |  |  |  |  |  |  |  |  |  |  | 10 years |  |  |  |  |
Option vesting period (in years) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4 years | 4 years | 4 years | 2 years | 2 years | 2 years
Unamortized Expense Share Issuance | $ 0.1 |  |  | $ 0.4 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning Outstanding (in shares) | 69,154 | 127,975 | 120,970 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Awarded (in shares) | 0 | 0 | 60,600 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Released (in shares) | (33,951) | (58,771) | (51,595) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Forfeited (in shares) | 0 | (50) | (2,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ending Outstanding (in shares) | 35,203 | 69,154 | 127,975 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning Outstanding, Weighted Average Grant Date Fair Value (usd per share) | $ 10.13 | $ 9.06 | $ 9.42 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Awarded, Weighted Average Grant Date Fair Value (usd per share) | $ 0.00 | $ 0.00 | $ 7.98 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Released, Weighted Average Grant Date Fair Value (usd per share) | $ 10.13 | $ 7.81 | $ 8.72 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Forfeited, Weighted Average Grant Date Fair Value (usd per share) | $ 0.00 | $ 7.98 | $ 7.22 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ending Outstanding, Weighted Average Grant Date Fair Value (usd per share) | $ 10.13 | $ 10.13 | $ 9.06 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares Authorized |  |  |  |  |  |  |  |  |  |  | 2,300,000 |  |  | 500,000 |  |  |  | 500,000 |  |  |  |  |  |
Shares Available |  |  |  |  | 1,042,492 |  |  |  |  | 500,000 | 850,892 | 500,000 | 50,000 | 0 |  |  |  | 191,600 |  |  |  |  |  |
Options Outstanding |  |  |  |  | 1,063,324 | 1,059,567 | 891,293 | 611,384 |  |  | 856,394 |  |  | 52,460 |  |  |  | 154,470 |  |  |  |  |  |

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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, 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 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited 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)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event. + 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)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + 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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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued 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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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + 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 + 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 + 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 + 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 + Details
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- Definition Number of additional shares authorized for issuance under an established share-based compensation plan. + References No definition available. + Details
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + 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 (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + 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 Number of options outstanding, including both vested and non-vested options. + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Gross number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP). Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans. + References No definition available. + Details
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