Comprehensive Loss (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Components of comprehensive loss and related tax effects
Net loss	$ (2,980)	$ (8,329)	$ (9,120)	$ (19,622)
(Increase) decrease in unrealized loss on derivatives net of taxes of $151 and $(1476) for the three months ended June 30, 2012 and 2011, respectively and $265 and $(1476) for the nine months ended June 30, 2012 and 2011 respectively.	223	(2,175)	391	(2,175)
Decrease in unrealized gain on available-for-sale debt securities net of taxes of $(390) for the nine months ended June 30, 2011.				(575)
Comprehensive loss	$ (2,757)	$ (10,504)	$ (8,729)	$ (22,372)