Earnings Per Share (Schedule Of Calculation Of Basic And Diluted Earnings Per Share Of Common Stock Outstanding) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011	Dec. 31, 2010
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income	$ 59,255	$ 53,052	$ 107,622	$ 80,440
Weighted average shares outstanding	71,463	70,972	71,265	70,818
Total weighted average shares outstanding	72,299	71,629	72,085	71,364
Earnings per share basic, net income	$ 0.83	$ 0.75	$ 1.51	$ 1.14
Earnings per share diluted, net income	$ 0.82	$ 0.74	$ 1.49	$ 1.13
Basic [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income	59,255	53,052	107,622	80,440
Weighted average shares outstanding	71,463	70,972	71,265	70,818
Employee stock options	0	0	0	0
Total weighted average shares outstanding	71,463	70,972	71,265	70,818
Earnings per share basic, net income	$ 0.83	$ 0.75	$ 1.51	$ 1.14
Diluted [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income	$ 59,255	$ 53,052	$ 107,622	$ 80,440
Weighted average shares outstanding	71,463	70,972	71,265	70,818
Employee stock options	836	657	820	546
Total weighted average shares outstanding	72,299	71,629	72,085	71,364
Earnings per share diluted, net income	$ 0.82	$ 0.74	$ 1.49	$ 1.13