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Derivative Financial Instruments - Additional Information (Details) - Interest rate swap $ in Thousands | Sep. 30, 2019 USD ($) | Sep. 30, 2018 USD ($) item
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Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Derivative, Notional Amount | $ | $ 150,000 | $ 150,000
Derivative, Number of Instruments Held | item |  | 3

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