Capital Stock (Narrative) (Details) (USD $)	12 Months Ended			61 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2012
Capital Stock [Abstract]
Common stock, shares authorized (in shares)	70,000,000	70,000,000		70,000,000
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000		5,000,000
Stock repurchased and retired under repurchase program		$ 4,000,000
Stock repurchased and retired during period (shares)		500,000		14,179,711
Stock repurchased and retired during period, value	537,000	4,097,000	1,108,000	88,500,000
Stock repurchase program, remaining authorized repurchase amount	19,800,000
Shares paid for tax withholding for share based compensation (shares)	56,849	8,879
Payments related to tax withholding for share-based compensation	$ 537,000	$ 76,000