Income Taxes (Components of Provision (Benefit)) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Current:
United States									$ (150)	$ 2,440	$ 800
Foreign									800	(9,380)	15,910
State									(110)	(90)	110
Total current									540	(7,030)	16,820
Deferred:
United States									(290)	0	(100)
Foreign									1,610	1,700	(520)
State									0	10	(10)
Total deferred									1,320	1,710	(630)
Total provision (benefit)	$ 580	$ 2,560	$ (800)	$ (480)	$ (3,670)	$ (1,110)	$ (220)	$ (320)	$ 1,860	$ (5,320)	$ 16,190