Income Taxes (Reconciliation of Balance Sheet) (Details) (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Sep. 30, 2010
Provision for Income Taxes	$ (4,928)	$ 2,850	$ (7,322)	$ 10,507
Net income	2,266	3,634	3,288	16,785
Basic Net Income Per Share	$ 0.04	$ 0.07	$ 0.06	$ 0.34
Diluted Net Income Per Share	$ 0.04	$ 0.07	$ 0.06	$ 0.32
Deferred Costs and Other Assets	49,734		49,734		26,640
Deferred Tax Assets	22,476		22,476		12,675
Additional paid-in Capital	801,991		801,991		739,781
Accumulated Deficit	(96,248)		(96,248)		(99,536)
Reported [Member]
Provision for Income Taxes		2,741		10,180
Net income		3,743		17,112
Basic Net Income Per Share		$ 0.07		$ 0.35
Diluted Net Income Per Share		$ 0.07		$ 0.32
Deferred Costs and Other Assets					26,671
Deferred Tax Assets					13,601
Additional paid-in Capital					739,772
Accumulated Deficit					(98,570)
Adjustment [Member]
Provision for Income Taxes		109		327
Net income		(109)		(327)
Basic Net Income Per Share				$ (0.01)
Diluted Net Income Per Share
Deferred Costs and Other Assets					(31)
Deferred Tax Assets					(926)
Additional paid-in Capital					9
Accumulated Deficit					$ (966)