Income Taxes (Details) (USD $)	3 Months Ended		9 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Sep. 30, 2011
Income Taxes (Textual) [Abstract]
Company's effective income tax rate	59.20%	27.90%	64.80%	30.80%
Company's reserve for uncertain income tax	$ 0		$ 0		$ 6,100,000