Long-term Debt and Line of Credit - Derivative Financial Instruments (Details) $ in Millions	Jul. 31, 2020 USD ($)	Sep. 16, 2015 USD ($) item
Debt Disclosure [Abstract]
Percent Of aggregate principal amount hedged		50.00%
Derivative, notional amount | $	$ 27.0	$ 67.5
Derivative, number of instruments held | item		5