Summary Of Significant Accounting Policies (Schedule Of Basic And Diluted Earnings Per Share Calculations) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Summary Of Significant Accounting Policies [Abstract]
Net income	$ 26,662	$ 21,258
Net income available to participating securities	(53)	(27)
Net income available to common shareholders	$ 26,609	$ 21,231
Weighted average common shares outstanding - basic	27,229	27,290
Incremental share effect from:
Restricted stock	5	6
Stock-settled stock appreciation rights	30	18
Weighted average common shares outstanding - diluted	27,264	27,314
Net income per common share - basic and diluted	$ 0.98	$ 0.78