Summary Of Significant Accounting Policies (Schedule Of Basic And Diluted Earnings Per Share Calculations) (Details) (USD $) In Thousands, except Per Share data	3 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Summary Of Significant Accounting Policies [Abstract]
Net income	$ 21,258	$ 22,767
Net income available to participating securities	(27)	(41)
Net income available to common shareholders	$ 21,231	$ 22,726
Weighted average common shares outstanding - basic	27,290	28,014
Incremental share effect from:
Restricted stock	6	6
Stock-settled stock appreciation rights	18	17
Weighted average common shares outstanding - diluted	27,314	28,037
Net income per common share - basic and diluted	$ 0.78	$ 0.81