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Employee Benefit Plans (Details) - USD ($) $ in Millions | 12 Months Ended
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Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2013
Defined Contribution Plan Disclosure [Line Items] |  |  |
Maximum annual contribution per employee percentage | 25.00% |  |
Matching contributions, amount | $ 1.7 | $ 1.6 | $ 1.4
Full Employer Match |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Employers percent of matching contributions | 100.00% |  |
Percent of employees' gross pay for employer match | 3.00% |  |
Half Employer Match |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Employers percent of matching contributions | 50.00% |  |
Percent of employees' gross pay for employer match | 2.00% |  |

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- Definition The amount of the cost recognized during the period for defined contribution plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
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- Definition Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan. + References No definition available. + Details
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- Details
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- Details
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