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