Shareholders' Equity (Schedule Of Changes In Accumulated Other Comprehensive Income And Changes In Equity) (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Beginning Balance	$ 1,529,611	$ 1,423,658
Net income	54,555	48,367
Comprehensive income (loss), net	(3,449)	(50,803)
Treasury stock repurchases	(4,809)
Exercise of stock options, net of shares received	4,133	(1,287)
Share-based compensation, net of tax	4,852	2,525
Dividends ($per share)	(10,443)	(5,245)
Dividends per share	$ 0.60	$ 0.30
Ending Balance	1,574,450	1,417,215
Preferred Stock [Member]
Beginning Balance	0	0
Net income	0	0
Comprehensive income (loss), net	0	0
Treasury stock repurchases	0
Exercise of stock options, net of shares received	0	0
Share-based compensation, net of tax	0	0
Dividends ($per share)	0	0
Ending Balance	0	0
Common Stock [Member]
Beginning Balance	961	956
Net income	0	0
Comprehensive income (loss), net	0	0
Treasury stock repurchases	0
Exercise of stock options, net of shares received	7	1
Share-based compensation, net of tax	0	0
Dividends ($per share)	0	0
Ending Balance	968	957
Additional Paid-In Capital [Member]
Beginning Balance	943,971	915,433
Net income	0	0
Comprehensive income (loss), net	0	0
Treasury stock repurchases	0
Exercise of stock options, net of shares received	4,126	(1,288)
Share-based compensation, net of tax	4,852	2,525
Dividends ($per share)	0	0
Ending Balance	952,949	916,670
AOCI [Member]
Beginning Balance	29,709	136,733
Net income	0	0
Comprehensive income (loss), net	(3,449)	(50,803)
Treasury stock repurchases	0
Exercise of stock options, net of shares received	0	0
Share-based compensation, net of tax	0	0
Dividends ($per share)	0	0
Ending Balance	26,260	85,930
Retained Earnings [Member]
Beginning Balance	1,726,486	1,418,106
Net income	54,555	48,367
Comprehensive income (loss), net	0
Treasury stock repurchases	0
Exercise of stock options, net of shares received	0	0
Share-based compensation, net of tax	0	0
Dividends ($per share)	(10,443)	(5,245)
Ending Balance	1,770,598	1,461,228
Treasury Stock [Member]
Beginning Balance	(1,171,516)	(1,047,570)
Net income	0	0
Comprehensive income (loss), net	0	0
Treasury stock repurchases	(4,809)
Exercise of stock options, net of shares received	0	0
Share-based compensation, net of tax	0	0
Dividends ($per share)	0	0
Ending Balance	$ (1,176,325)	$ (1,047,570)