Equity Securities and Stock-Based Compensation (Details) (USD $)	1 Months Ended	2 Months Ended	12 Months Ended
	Feb. 29, 2012	Nov. 18, 2014	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Equity Securities and Stock-Based Compensation
Common stock, authorized shares			200,000,000	200,000,000
Preferred stock, shares authorized			10,000,000	10,000,000
Preferred stock, shares issued			0	0
Preferred stock, shares outstanding			0	0
Common stock, shares issued				11,500,000
Gross proceeds from issuance of common stock				$ 83,400,000
Offering costs				5,418,000
Net proceeds from issuance of common stock			0	77,957,000	0
Amount available for future offerings of securities	210,000,000		126,600,000
Treasury stock and related deferred compensation obligation at fair value			800,000
Amount that the fair values of treasury stock and related deferred compensation obligation exceed the carrying values at cost			200,000
Board approved share-based award grants to officers, employees, and directors (in shares)		300,000	500,000	500,000	1,200,000
Stock-based compensation			2,165,000	1,703,000	1,737,000
Total income tax benefit recognized for stock-based compensation			$ 0	$ 0	$ 0
Equity Securities and Stock-based Compensation
Awards granted vesting period			3 years
Contractual term			10 years
Stock Appreciation Rights (SARs)
Equity Securities and Stock-based Compensation
Awards granted vesting period			3 years
Contractual term			10 years
Period of average stock price hurdles that precluded vesting			60 days	60 days