Stock-based Compensation (Details) (USD $)	3 Months Ended						3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 Stock Options [Member]	Dec. 31, 2013 SSARs / Stock Options [Member]	Dec. 31, 2013 Nonvested Stock Awards [Member]	Sep. 30, 2013 Nonvested Stock Awards [Member]	Dec. 31, 2013 Performance Shares [Member]	Dec. 31, 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	$ 413,000	$ 19,000
Total stock-based compensation included in general and administrative expenses	600,000
Total stock-based compensation included in general and administrative expenses, net of tax	500,000
Number of shares surrendered by emloyees (shares)	21,693	1,306
Intrinsic value of SSAR/stock options outstanding				4,500,000
Aggregate intrinsic value of SSARs/stock options vested and expected to vest				4,500,000
SSARs/stock options weighted average expected life				2 years 10 months 24 days
Unrecognized compensation costs related to non-vested stock awards					2,700,000	1,000,000
Number of shares of performance-based restricted stock issued (shares)							28,690
Weighted average period to recognize remaining cost					1 year 9 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)							35.00%
Expected volatility rate range maximum (percent)							59.10%
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)				560,784
Granted (shares)				$ 2,000,000
Exercised (shares)				(106)
Forfeited (shares)				(561)
Shares outstanding at end of period (shares)				721,127
Exercisable at end of period				416,917
Vested or expected to vest in the future (shares)				715,768
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				$ 33.01
Weighted average exercise price of shares granted				$ 19.11
Weighted average exercise price of shares exercised				$ 10.80
Weighted average exercise price of shares forfeited				$ 15.23
Weighted average exercise price of shares outstanding at beginning of period				$ 29.92
Weighted average exercise price of shares exercisable at end of period				$ 39.93
Weighted average exercise price of shares vested or expected to vest in the future				$ 30.02
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)									280,416
Granted (shares)				161,010				135,567
Shares vested (shares)								(102,038)
Shares forfeited (shares)								(1,090)
Shares outstanding at end of period (shares)								312,855	280,416
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									$ 12.32
Weighted average grant date fair value of shares granted							$ 15.90	$ 17.53
Weighted average grant date fair value of shares vested in period								$ 16.64
Weighted average grant date fair value of shares forfeited in period								$ 10.77
Weighted average grant date fair value of shares outstanding at end of period								$ 13.18	$ 12.32