Debt (Narrative) (Details) (USD $)	3 Months Ended				3 Months Ended		3 Months Ended		0 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2013 Minimum [Member]	May 14, 2012 Minimum [Member]	Dec. 31, 2013 Maximum [Member]	May 14, 2012 Maximum [Member]	May 14, 2012 JPMorgan Chase Bank N.A. [Member]
Debt Instrument [Line Items]
Revolving credit facility									$ 450,000,000
Revolving credit facility period									5 years
Available to borrow under the credit facility	264,000,000
Option amount to increase credit facility	250,000,000
Cash on hand	34,367,000	42,850,000	33,489,000	30,215,000
Incremental term loan						25,000,000		250,000,000
Percentage of foreign subsidiaries' share equity	65.00%
Average aggregate short-term borrowings outstanding	500,000
Letters of Credit Outstanding, Amount	9,000,000
Line of Credit Facility, Amount Outstanding	$ 186,000,000
Credit facility fees					17.50%		35.00%