Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2014	Sep. 30, 2013
Statement of Financial Position [Abstract]
Preferred stock, par value (USD per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	2,000,000	2,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (USD per share)	$ 0.01	$ 0.01
Common stock, shares authorized	60,000,000	60,000,000
Common stock, shares issued	30,703,895	30,264,224
Treasury stock, shares	6,313,937	4,708,965