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Derivatives and Hedging Activities (Schedule of Cash Flow Hedge Included in Accumulated Other Comprehensive Income (Loss), Net of Income Taxes) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Derivative Instruments, Gain (Loss) [Line Items]    
Net increase in accumulated other comprehensive income, net of tax $ 413 $ 109
Interest rate swap agreement    
Derivative Instruments, Gain (Loss) [Line Items]    
Net interest expense recognized as a result of interest rate swap 580 560
Unrealized loss in fair value of interest rate swap (15) (402)
Net increase in accumulated other comprehensive income 565 158
Income tax effect 152 49
Net increase in accumulated other comprehensive income, net of tax $ 413 $ 109