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Income Taxes - Textual (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2014
Income Taxes [Abstract] |  |  |
Effective tax rate | 34.50% | 33.20% | 34.50%
Federal statutory rate | 35.00% |  |
Operating Loss Carryforwards [Line Items] |  |  |
Net operating loss carryforwards | $ 40.1 | $ 58.5 |
Unrecognized tax benefits | 0.0 | 0.0 | $ 0.0
Accrued interest related to unrecognized tax benefits | 0.0 | 0.0 | 0.0
Accrued penalties related to unrecognized tax benefits | 0.0 | $ 0.0 | 0.0
Interest benefits related to unrecognized tax benefits |  |  | $ (2.2)
State [Member] |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Net operating loss carryforwards | 40.1 |  |
State [Member] | Tax Credit Carryforward Amount to Expire [Member] |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Tax credit carry forwards | 1.6 |  |
State [Member] | Tax Credit Carryforward Amount with No Expiration [Member] |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Tax credit carry forwards | 1.3 |  |
State [Member] | NOL Carryforwards to Expire in One to Five Years [Member] |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Net operating loss carryforwards, subject to expiration | 0.3 |  |
State [Member] | NOL Carryforwards to Expire in Six to Ten Years [Member] |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Net operating loss carryforwards, subject to expiration | 12.9 |  |
State [Member] | Latest Tax Year [Member] |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Net operating loss carryforwards, subject to expiration | $ 26.9 |  |

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=68052875&loc=d3e28680-109314 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32621-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32632-109319 + Details
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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32698-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32687-109319 + Details
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