Earnings Per Share (Schedule Of Calculation Of Basic And Diluted Earnings Per Share Of Common Stock Outstanding) (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Earnings Per Share Basic And Diluted [Line Items]
Net income	$ 54,555	$ 48,367
Weighted average shares outstanding	68,682	71,283
Total weighted average shares outstanding	69,471	71,882
Diluted [Member]
Earnings Per Share Basic And Diluted [Line Items]
Net income	54,555	48,367
Weighted average shares outstanding	68,682	71,283
Employee stock options	789	599
Total weighted average shares outstanding	69,471	71,882
Earnings per share	$ 0.79	$ 0.67
Basic [Member]
Earnings Per Share Basic And Diluted [Line Items]
Net income	$ 54,555	$ 48,367
Weighted average shares outstanding	68,682	71,283
Employee stock options	0	0
Total weighted average shares outstanding	68,682	71,283
Earnings per share	$ 0.79	$ 0.68