Contractual Obligations (Schedule) (Details) (USD $)	Sep. 30, 2012
Contractual Obligations [Abstract]
Senior convertible notes, including interest, 2013	$ 7,188,000
Senior convertible notes, including interest, 2014	7,188,000
Senior convertible notes, including interest, 2015	294,687,000
Senior convertible notes, including interest, 2016	0
Senior convertible notes, including interest, 2017	0
Senior convertible notes, including interest, Thereafter	0
Senior convertible notes, including interest, Total	309,063,000
Operating leases, 2013	6,497,000
Operating leases, 2014	7,724,000
Operating leases, 2015	6,907,000
Operating leases, 2016	6,575,000
Operating leases, 2017	5,563,000
Operating leases, Thereafter	31,523,000
Operating leases, Total	64,789,000
Purchase obligations, 2013	7,225,000
Purchase obligations, 2014	4,834,000
Purchase obligations, 2015	3,730,000
Purchase obligations, 2016	3,648,000
Purchase obligations, 2017	1,921,000
Purchase obligations, Thereafter	0
Purchase obligations, Total	$ 21,358,000