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Earnings Per Share Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net Income	$ 50,712	$ 42,606	$ 150,679	$ 134,188
Common share information:
Weighted average shares outstanding for basic earnings per share	80,880	84,981	81,502	85,242
Dilutive effect of stock options and restricted stock	214	486	271	527
Weighted average shares outstanding for diluted earnings per share	81,094	85,467	81,773	85,769
Basic earnings per share	$ 0.63	$ 0.50	$ 1.85	$ 1.57
Diluted earnings per share	$ 0.63	$ 0.50	$ 1.84	$ 1.56
Antidilutive stock options and restricted stock excluded from computation of earnings per share	112	0	83	6

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