Income Per Share (Schedule Of Earnings Per Share, Basic And Diluted) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Income Per Share [Abstract]
Net income	$ 44,809	$ 42,371	$ 46,993	$ 51,603
Weighted average shares outstanding	29,680	28,980	29,617	28,925
Net income per basic share	$ 1.51	$ 1.46	$ 1.59	$ 1.78
Potential common shares - treasury method	812	937	881	988
Weighted average shares and potential dilutive common shares	30,492	29,917	30,498	29,913
Net income per diluted share	$ 1.47	$ 1.42	$ 1.54	$ 1.73