Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) (USD $)	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared on common stock (in dollars per share)	$ 0.52	$ 0.52	$ 0.52
Issuance of common shares from treasury stock due to exercise of stock options (in shares)		19,669	13,776