Earnings Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Net Income	$ 49,788	$ 42,475
Common share information:
Weighted average shares outstanding for basic earnings per share	85,294	86,109
Dilutive effect of stock options and restricted stock	560	496
Weighted average shares outstanding for diluted earnings per share	85,854	86,605
Basic earnings per share	$ 0.58	$ 0.49
Diluted earnings per share	$ 0.58	$ 0.49
Antidilutive stock options and restricted stock excluded from computation of earnings per share	18	32