Fair Value of Financial Instruments (Interest Rate Swaps) (Details) - Derivatives designed as hedging instruments - Interest Rate Swap Maturing 8/31/2022 $ in Thousands	Mar. 31, 2020 USD ($)
Bank of Montreal
Derivatives, Fair Value [Line Items]
Notional Amount	$ 100,000
U.S. Bank
Derivatives, Fair Value [Line Items]
Notional Amount	100,000
Regions Bank
Derivatives, Fair Value [Line Items]
Notional Amount	50,000
Royal Bank of Canada
Derivatives, Fair Value [Line Items]
Notional Amount	$ 50,000