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				6 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2020	Dec. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Net increase (decrease) in accumulated other comprehensive income, net of tax	$ 519	$ 109	$ 900	$ (1,071)	$ 628	$ (171)
Interest Rate Swap
Derivative Instruments, Gain (Loss) [Line Items]
Net interest expense recognized as a result of interest rate swap	565		136		1,125	163
Unrealized gain (loss) in fair value of interest rate swap	135		1,068		(268)	(372)
Net increase (decrease) in accumulated other comprehensive income	700		1,204		857	(209)
Income tax effect	181		304		230	(38)
Net increase (decrease) in accumulated other comprehensive income, net of tax	$ 519		$ 900		$ 627	$ (171)