Cash Dividends (Details) (USD $)	1 Months Ended		3 Months Ended		9 Months Ended
	Jun. 30, 2012	Mar. 31, 2012	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Cash Dividends
Cash dividends, per share	$ 0.07	$ 0.07	$ 0.07	$ 0.07	$ 0.21	$ 0.19
Cash dividend paid, per share	$ 0.07