Stockholders' Equity (Narrative) (Details) (USD $)	12 Months Ended			73 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2013
Equity [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 during period (shares)				14,179,711
Stock repurchased and retired during period, value	$ 555,000	$ 537,000	$ 4,097,000	$ 88,500,000
Stock repurchase program, remaining authorized repurchase amount	19,800,000
Shares paid for tax withholding for share based compensation (shares)	59,501	56,849
Payments related to tax withholding for share-based compensation	$ 555,000	$ 537,000