Derivative Instruments and Hedging Activities - Additional Information (Details) - Interest Rate Swap - Cash Flow Hedging - Designated as Hedging Instrument - USD ($)	Feb. 20, 2020	Aug. 08, 2018	Aug. 31, 2017	Sep. 30, 2016	[1]
Derivative [Line Items]
Aggregate notional amount	$ 100,000,000.0	$ 50,000,000.0	$ 25,000,000.0	$ 100,000,000.0
Derivative, fixed interest rate	1.294%	2.854%	1.8475%
Beginning dates of effected cash flows	Feb. 28, 2020	Aug. 31, 2018	Aug. 31, 2018	Jan. 31, 2018
Ending dates of effected cash flows	Feb. 28, 2025	Aug. 31, 2023	Aug. 31, 2023	Jan. 31, 2023

[1] On December 1, 2016, the Company sold the interest rate hedge agreement.  The fair value of the interest rate hedge, as of the date of the sale, was recorded in other comprehensive income, net of tax.  The gain from the sale will be recognized into earnings when earnings are impacted by the cash flows of the previously hedged variable interest rate.