Income and other Taxes (Other Disclosures) (Details) (USD $)	3 Months Ended		6 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013	Sep. 30, 2013
Income Tax Disclosure [Abstract]
Income tax penalties and interest accrued	$ 387,000		$ 387,000		$ 354,000
Income tax penalties and interest expense	0	100,000
Incentive tax credits received		$ 1,400,000	$ 600,000	$ 1,400,000