Summary Of Significant Accounting Policies (Schedule Of Basic And Diluted Net Income Per Common Share Calculations) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Accounting Policies [Abstract]
Net income	$ 37,592	$ 30,655
Net income available to participating securities	(118)	(87)
Net income available to common shareholders	$ 37,474	$ 30,568
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average common shares outstanding - basic (in shares)	27,450	27,459
Weighted average common shares outstanding - diluted (in shares)	27,458	27,515
Net income per common share – basic	$ 1.37	$ 1.11
Net income per common share – diluted	$ 1.36	$ 1.11
Nonparticipating Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incremental share effect from awards with forfeitable dividends (in shares)	4	3
Stock Settled Stock Appreciation Rights SARS [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incremental share effect from stock-settled stock appreciation rights (in shares)	0	49
Weighted average number of antidilutive securities (in rights outstanding)	300	100
Performance Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incremental share effect from awards with forfeitable dividends (in shares)	4	4