Shareholders' Equity (Cumulative Number Of Shares Purchased Under The Purchase Authorizations) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Dec. 31, 2012	Sep. 30, 2012
Shareholders' Equity [Abstract]
Total shares purchased, Beginning Balance Number of Shares		14,360
Total shares purchased, Number of Shares	920	276
Total shares purchased, Ending Balance Number of Shares	15,556
Total shares purchased, Beginning Balance Average Purchase Price per Share		$ 24.24
Total shares purchased, Average Purchase Price per Share	$ 43.70	$ 47.63
Total shares purchased, Ending Balance Average Purchase Price per Share	$ 25.81
Total shares purchased, Beginning Balance Total Purchase Price		$ 348,066
Total shares purchased, Total Purchase Value	40,207	13,165
Total shares purchased, Ending Balance Total Purchase Price	$ 401,438