Stock-based Compensation (Details) (USD $)	3 Months Ended	6 Months Ended			3 Months Ended	6 Months Ended	3 Months Ended		6 Months Ended	3 Months Ended	6 Months Ended
	Mar. 31, 2014	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014 Stock Options [Member]	Mar. 31, 2014 SSARs / Stock Options [Member]	Mar. 31, 2014 SSARs / Stock Options [Member]	Mar. 31, 2014 Nonvested Stock Awards [Member]	Sep. 30, 2013 Nonvested Stock Awards [Member]	Mar. 31, 2014 Performance Shares [Member]	Mar. 31, 2014 Nonvested Stock Awards and Performance Shares [Member]	Mar. 31, 2014 Nonvested Stock Awards and Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation included in general and administrative expenses	$ 700,000
Total stock-based compensation included in general and administrative expenses, net of tax	500,000
Number of shares surrendered by emloyees (shares)		21,772	1,306
Stock Surrendered During Period, Value		414,000	19,000
Intrinsic value of SSAR/stock options outstanding					2,200,000	2,200,000
Aggregate intrinsic value of SSARs/stock options vested and expected to vest					2,200,000	2,200,000
SSARs/stock options weighted average expected life					2 years 9 months 7 days
Unrecognized compensation costs related to non-vested stock awards							2,200,000	1,000,000
Weighted average period to recognize remaining cost							1 year 8 months 12 days
Number of shares of performance-based restricted stock issued (shares)									28,690
Non-vested stock performance period (years)									3 years
Increase in target number of Performance Shares (percent)									50.00%
Expected dividend yield on performance shares (percent)									0.00%
Expected volatility rate range minimum (percent)									35.00%
Expected volatility rate range maximum (percent)									59.10%
Aggregate intrinsic value of exercisable SSARs/stock options					1,000,000	1,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions [Abstract]
Expected life of options				5 years 26 days
Expected volatility				45.99%
Expected discrete dividends				$ 0
Weighted average risk-free interest rate				1.42%					0.66%
Weighted average fair value				$ 7.97
Share-based Compensation Arrangement by Share-based Payment Award, Outstanding [Roll Forward]
Shares outstanding at beginning of period (shares)					721,127	560,784
Granted (shares)					0	161,010				0	135,567
Exercised (shares)					(1,182)	(1,288)
Expired (shares)					(2,870)	(2,870)
Forfeited (shares)					(5,206)	(5,767)
Shares outstanding at end of period (shares)					711,869	711,869
Exercisable at end of period					408,929	408,929
Vested or expected to vest in the future (shares)					706,895	706,895
Share-based Compensation Arrangement by Share-based Payment Award, Outstanding, Weighted Average Exercise Price [Roll Forward]
Weighted average exercise price of shares outstanding at beginning of period					$ 29.92	$ 33.01
Weighted average exercise price of shares granted					$ 0.00	$ 19.11
Weighted average exercise price of shares exercised					$ 16.64	$ 16.16
Weighted average exercise price of shares expired					$ 176.31	$ 176.31
Weighted average exercise price of shares forfeited					$ 22.60	$ 22.23
Weighted average exercise price of shares outstanding at beginning of period					$ 29.41	$ 29.41
Weighted average exercise price of shares exercisable at end of period					$ 39.19	$ 39.19
Weighted average exercise price of shares vested or expected to vest in the future					$ 29.49	$ 29.49
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Shares outstanding at beginning of period (shares)										312,855	280,416
Granted (shares)					0	161,010				0	135,567
Shares vested (shares)										(239)	(102,277)
Shares forfeited (shares)										(6,160)	(7,250)
Shares outstanding at end of period (shares)										306,456	306,456
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Weighted average grant date fair value of shares outstanding at beginning of period										$ 13.18	$ 12.32
Weighted average grant date fair value of shares granted									$ 15.90	$ 0.00	$ 17.53
Weighted average grant date fair value of shares vested in period										$ 18.82	$ 16.64
Weighted average grant date fair value of shares forfeited in period										$ 17.45	$ 16.45
Weighted average grant date fair value of shares outstanding at end of period										$ 13.08	$ 13.08