Stock-based Compensation (Details) (USD $)	3 Months Ended	9 Months Ended			3 Months Ended	9 Months Ended	3 Months Ended		9 Months Ended	3 Months Ended	9 Months Ended
	Jun. 30, 2013	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013 Stock Options [Member]	Jun. 30, 2013 SSARs / Stock Options [Member]	Jun. 30, 2013 SSARs / Stock Options [Member]	Jun. 30, 2013 Nonvested Stock Awards [Member]	Sep. 30, 2012 Nonvested Stock Awards [Member]	Jun. 30, 2013 Performance Shares [Member]	Jun. 30, 2013 Nonvested Stock Awards and Performance Shares [Member]	Jun. 30, 2013 Nonvested Stock Awards and Performance Shares [Member]	Dec. 31, 2012 Nonvested Stock Awards and Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Surrendered During Period, Value		$ 121,000	$ 34,000
Total stock-based compensation included in general and administrative expenses	600,000	2,300,000
Total stock-based compensation included in general and administrative expenses, net of tax	500,000	1,800,000
Number of shares surrendered by emloyees (shares)		6,147	12,553
Intrinsic value of SSAR/stock options outstanding					1,400,000	1,400,000
Aggregate intrinsic value of SSARs/stock options vested and expected to vest					1,400,000	1,400,000
SSARs/stock options weighted average expected life					2 years 8 months 24 days
Unrecognized compensation costs related to non-vested stock awards							1,400,000	2,100,000
Number of shares of performance-based restricted stock issued (shares)									31,532
Weighted average period to recognize remaining cost							1 year 3 months 18 days
Increase in target number of Performance Shares (percent)									50.00%
Non-vested stock performance period (years)									3 years
Expected dividend yield on performance shares (percent)									0.00%
Expected volatility rate range minimum (percent)									35.60%
Expected volatility rate range maximum (percent)									60.40%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions [Abstract]
Expected life of options				5 years
Expected volatility				46.15%
Expected discrete dividends				0
Weighted average risk-free interest rate				0.63%					0.34%
Weighted average fair value				$ 5.48
Share-based Compensation Arrangement by Share-based Payment Award, Outstanding [Roll Forward]
Shares outstanding at beginning of period (shares)					574,165	429,965
Granted (shares)					$ 200,000	$ 200,000
Exercised (shares)					(503)	(608)
Expired (shares)					0	(7,703)
Forfeited (shares)					(763)	(4,320)
Shares outstanding at end of period (shares)					577,985	577,985
Exercisable at end of period					325,396	325,396
Vested or expected to vest in the future (shares)					574,752	574,752
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					$ 32.75	$ 40.80
Weighted average exercise price of shares granted					$ 20.58	$ 13.56
Weighted average exercise price of shares exercised					$ 10.80	$ 10.80
Weighted average exercise price of shares expired					$ 0.00	$ 96.45
Weighted average exercise price of shares forfeited					$ 12.56	$ 17.86
Weighted average exercise price of shares outstanding at beginning of period					$ 32.69	$ 32.69
Weighted average exercise price of shares exercisable at end of period					$ 47.52	$ 47.52
Weighted average exercise price of shares vested or expected to vest in the future					$ 32.79	$ 32.79
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)											323,335	374,753
Granted (shares)					5,086	160,651				6,104	99,413
Shares vested (shares)										(94,471)	(126,124)
Shares forfeited (shares)										(3,615)	(13,853)
Shares outstanding at end of period (shares)										282,771	282,771	374,753
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											$ 19.61	$ 18.19
Weighted average grant date fair value of shares granted									$ 5.02	$ 20.58	$ 10.95
Weighted average grant date fair value of shares vested in period										$ 33.22	$ 27.59
Weighted average grant date fair value of shares forfeited in period										$ 13.30	$ 13.92
Weighted average grant date fair value of shares outstanding at end of period										$ 13.29	$ 13.29	$ 18.19