Accrued Expenses (Schedule of Accrued Expenses) (Details) (USD $) In Thousands, unless otherwise specified			0 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Jan. 31, 2011 Si En
Business Acquisition [Line Items]
Deferred distributor margin	$ 2,301	$ 2,122
Business Combination, Consideration Transferred, Holdback Provision	0	4,200	4,200
Other	5,056	4,811
Accrued expenses	$ 7,357	$ 11,133
Holdback provision period (years)			2 years