Income Taxes (Components of Provision (Benefit)) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Current:
Domestic Federal									$ 2,440	$ 800	$ 200
Foreign									(9,380)	15,910	7,200
Domestic state									(90)	110	110
Total current									(7,030)	16,820	7,510
Deferred:
Domestic Federal									0	(100)	(1,540)
Foreign									1,700	(520)	180
Domestic state									10	(10)	0
Total deferred									1,710	(630)	(1,360)
Total provision	$ (3,670)	$ (1,110)	$ (220)	$ (320)	$ 2,600	$ 5,160	$ 5,100	$ 3,330	$ (5,320)	$ 16,190	$ 6,150