Debt (Senior Notes) (Narrative) (Details) (USD $)				1 Months Ended
	Oct. 31, 2013 Other Committed And Uncommitted Revolving Credit Facilities Expiring on Various Dates Through Fiscal 2017	Jul. 31, 2013 Other Committed And Uncommitted Revolving Credit Facilities Expiring on Various Dates Through Fiscal 2017	Jan. 31, 2013 Other Committed And Uncommitted Revolving Credit Facilities Expiring on Various Dates Through Fiscal 2017	Sep. 30, 2012 Senior Notes	Oct. 31, 2013 Senior Notes	Jan. 31, 2013 Senior Notes	Sep. 30, 2012 Treasury Rate Senior Notes
Debt Instrument [Line Items]
Line of Credit Facility Interest Rate At End of Period	6.13%		2.09%
Debt Instrument Expiration Year		2017
Debt, face value				$ 350,000,000	$ 350,000,000	$ 350,000,000
Debt, stated interest rate in percentage				3.75%		3.75%
Proceeds from issuance of long-term debt				345,800,000
Debt discount				1,300,000	1,039,000	1,238,000
Debt issuance costs				$ 2,900,000
Debt redemption price as a percent of principal amount				100.00%
Debt Instrument, Redemption Price, Discounted Scheduled Payments, Discount Rate, Basis Spread on Variable Rate							50.00%