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		6 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Earnings Per Share Basic And Diluted [Line Items]
Net income			$ 102,044	$ 107,622
Weighted average shares outstanding	69,009	71,463	68,846	71,265
Total weighted average shares outstanding	69,734	72,299	69,582	72,085
Diluted [Member]
Earnings Per Share Basic And Diluted [Line Items]
Net income	47,489	59,255	102,044	107,622
Weighted average shares outstanding	69,009	71,463	68,846	71,265
Employee stock options	725	836	736	820
Total weighted average shares outstanding	69,734	72,299	69,582	72,085
Earnings per share	0.68	0.82	$ 1.47	$ 1.49
Basic [Member]
Earnings Per Share Basic And Diluted [Line Items]
Net income	47,489	59,255	$ 102,044	$ 107,622
Weighted average shares outstanding	69,009	71,463	68,846	71,265
Employee stock options	0	0	0	0
Total weighted average shares outstanding	69,009	71,463	68,846	71,265
Earnings per share	0.69	0.83	$ 1.48	$ 1.51