Earnings Per Share Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net Income	$ 59,348	$ 53,882	$ 110,714	$ 99,969
Common share information:
Weighted average shares outstanding for basic earnings per share	79,473	81,432	80,009	81,813
Dilutive effect of stock options and restricted stock	297	202	243	299
Weighted average shares outstanding for diluted earnings per share	79,770	81,634	80,252	82,112
Basic earnings per share	$ 0.75	$ 0.66	$ 1.38	$ 1.22
Diluted earnings per share	$ 0.74	$ 0.66	$ 1.38	$ 1.22
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0	170	0	134