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Shareholders' Equity Net Income Per Share (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 12 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2012
Earnings Per Share [Abstract]      
Net income $ 112,821 $ 118,149 $ 108,779
Average Shares Outstanding:      
Weighted-average common shares outstanding for basic computation 41,942 42,060 42,139
Dilutive effect of potential common shares 389 482 684
Weighted-average common shares outstanding for dilutive computation 42,331 42,542 42,823
Net Income Per Share — Basic $ 2.69 $ 2.81 $ 2.58
Net Income Per Share — Diluted $ 2.67 $ 2.78 $ 2.54