Earnings Per Share Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Earnings Per Share, Basic and Diluted [Abstract]
Net Income	$ 58,814	$ 59,348	$ 121,058	$ 110,714
Common share information:
Weighted average shares outstanding for basic earnings per share	77,814	79,473	78,114	80,009
Dilutive effect of stock options and restricted stock	366	297	398	243
Weighted average shares outstanding for diluted earnings per share	78,180	79,770	78,512	80,252
Basic earnings per share	$ 0.76	$ 0.75	$ 1.55	$ 1.38
Diluted earnings per share	$ 0.75	$ 0.74	$ 1.54	$ 1.38
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	32	0	32	0