Stock-Based Compensation (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended				12 Months Ended				3 Months Ended						0 Months Ended	3 Months Ended	12 Months Ended		12 Months Ended
	Sep. 30, 2014 Restricted Stock	Sep. 30, 2013 Restricted Stock	Sep. 30, 2012 Restricted Stock	Dec. 31, 2013 Restricted Stock	Sep. 30, 2014 Stock Options	Sep. 30, 2013 Stock Options	Sep. 30, 2012 Stock Options	Sep. 30, 2011 Stock Options	Mar. 31, 2009 2007 Employee Stock Incentive Plan Stock-Based	Apr. 30, 2007 2007 Employee Stock Incentive Plan Stock-Based	Sep. 30, 2014 2007 Employee Stock Incentive Plan Stock Options	Jan. 31, 2008 1998 Employee Stock Option Plan Stock-Based	Jan. 01, 1998 1998 Employee Stock Option Plan Stock-Based	Sep. 30, 2014 1998 Employee Stock Option Plan Stock Options	Jul. 31, 2005 Non-Employee Directors Stock Option Plan Stock-Based	Mar. 31, 2009 Non-Employee Directors Stock Option Plan Stock-Based	Sep. 30, 1996 Non-Employee Directors Stock Option Plan Stock-Based	Sep. 30, 2014 Non-Employee Directors Stock Option Plan Stock Options	Sep. 30, 2014 Maximum Stock-Based	Sep. 30, 2014 Maximum Restricted Stock	Sep. 30, 2014 Maximum Stock Options	Sep. 30, 2014 Minimum Stock-Based	Sep. 30, 2014 Minimum Restricted Stock	Sep. 30, 2014 Minimum Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available to grant					1,042,492					500,000	850,892	500,000	50,000	0				191,600
Number of additional shares authorized									1,800,000							300,000
Stock Issued During Period, Shares, Share-based Compensation, Gross															200,000		100,000
Expiration period					10 years														10 years
Option vesting period (in years)																			4 years	4 years	4 years	2 years	2 years	2 years
Unamortized Expense Share Issuance	$ 0.1			$ 0.4
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Beginning Outstanding (in shares)	69,154	127,975	120,970
Awarded (in shares)	0	0	60,600
Released (in shares)	(33,951)	(58,771)	(51,595)
Forfeited (in shares)	0	(50)	(2,000)
Ending Outstanding (in shares)	35,203	69,154	127,975
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Beginning Outstanding, Weighted Average Grant Date Fair Value (usd per share)	$ 10.13	$ 9.06	$ 9.42
Awarded, Weighted Average Grant Date Fair Value (usd per share)	$ 0.00	$ 0.00	$ 7.98
Released, Weighted Average Grant Date Fair Value (usd per share)	$ 10.13	$ 7.81	$ 8.72
Forfeited, Weighted Average Grant Date Fair Value (usd per share)	$ 0.00	$ 7.98	$ 7.22
Ending Outstanding, Weighted Average Grant Date Fair Value (usd per share)	$ 10.13	$ 10.13	$ 9.06
Shares Authorized											2,300,000			500,000				500,000
Shares Available					1,042,492					500,000	850,892	500,000	50,000	0				191,600
Options Outstanding					1,063,324	1,059,567	891,293	611,384			856,394			52,460				154,470