Employee Benefits Plans - Narrative (Details) - USD ($) $ in Thousands |
12 Months Ended | |
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Sep. 30, 2017 |
Sep. 30, 2016 |
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| Retirement Benefits [Abstract] | ||
| Benefit plan period | 180 months | |
| Weighted-average discount rate | 4.08% | 4.30% |
| Estimated future benefit payments, year 2018 | $ 348 | |
| Estimated future benefit payments, year 2019 | 357 | |
| Estimated future benefit payments, year 2020 | 160 | |
| Estimated future benefit payments, year 2021 | 192 | |
| Estimated future benefit payments, year 2022 | 192 | |
| Estimated future benefit payments, thereafter | $ 1,249 |
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- Definition Defined Benefit Plan, Plan Period No definition available.
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- References No definition available.
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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of benefits for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following latest fiscal year. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of benefits for defined benefit plan expected to be paid in next fiscal year following latest fiscal year. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of benefits for defined benefit plan expected to be paid in fifth fiscal year following latest fiscal year. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of benefits for defined benefit plan expected to be paid in fourth fiscal year following latest fiscal year. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of benefits for defined benefit plan expected to be paid in third fiscal year following latest fiscal year. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of benefits for defined benefit plan expected to be paid in second fiscal year following latest fiscal year. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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