Stockholders' Equity (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Sep. 30, 2015 USD ($) $ / shares shares	Sep. 30, 2014 USD ($) shares	Sep. 30, 2013 USD ($) shares
Class of Stock [Line Items]
Preferred Stock, Shares Issued	0	0
Shares Paid for Tax Withholding for Share Based Compensation	10,302	23,602	6,147
Stock Redeemed or Called During Period, Value | $	$ 192	$ 450	$ 121
382 Ownership Limitation	4.95%
Range 2 | TEU Senior Amortizing Notes Maturing July 2015
Class of Stock [Line Items]
Debt Instrument, Convertible, Stock Price Trigger | $ / shares	$ 17.75
Range 3 | TEU Senior Amortizing Notes Maturing July 2015
Class of Stock [Line Items]
Debt Instrument, Convertible, Conversion Ratio	1.40746