Sale of Nutritional Bar Assets and Powder Facility and Facility Restructuring Charges (Details 2) $ in Thousands		3 Months Ended			12 Months Ended		21 Months Ended
	Mar. 12, 2013 item	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2013 USD ($)	Sep. 30, 2014 USD ($)
Facility restructuring charge
Cumulative charges before tax over the period					$ 29,493	$ 32,695
Non-cash charges, primarily accelerated depreciation		$ 7,207	$ 9,846	$ 3,282
Closure of facilities
Facility restructuring charge
Number of facilities eliminated | item	7
Cumulative charges before tax over the period							$ 32,695
Accelerated depreciation | Closure of facilities
Facility restructuring charge
Non-cash charges, primarily accelerated depreciation							$ 12,588