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, 2011	Sep. 30, 2011
Shareholders' Equity [Abstract]
Total shares purchased, Beginning Balance Number of Shares		13,072
Total shares purchased, Number of Shares	500	576
Total shares purchased, Ending Balance Number of Shares	14,148
Total shares purchased, Beginning Balance Average Purchase Price per Share		$ 22.10
Total shares purchased, Average Purchase Price per Share	$ 46.05	$ 44.13
Total shares purchased, Ending Balance Average Purchase Price per Share	$ 23.84
Total shares purchased, Beginning Balance Total Purchase Price		$ 288,867
Total shares purchased, Total Purchase Value	23,025	25,424
Total shares purchased, Ending Balance Total Purchase Price	$ 337,316