Property, Plant and Equipment (Details) £ in Thousands, $ in Thousands	1 Months Ended		3 Months Ended			12 Months Ended
	Jul. 31, 2015 GBP (£)	Jul. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2013 USD ($)
Property, Plant and Equipment
Property, plant and equipment, gross			$ 866,341			$ 866,341	$ 800,482
Less accumulated depreciation and amortization			(260,293)			(260,293)	(203,280)
Property, plant and equipment, net			605,708			605,708	597,202
Depreciation of property, plant and equipment						89,850	60,530	$ 64,883
Accelerated depreciation charges			7,207	$ 9,846	$ 3,282
Proceeds from sale-leaseback						52,826
Capital lease obligation, current			998			998
Long-term capital lease obligation less current installments			46,442			46,442
Holland & Barrett International
Property, Plant and Equipment
Proceeds from sale-leaseback	£ 34,200	$ 52,826
Lease term	30 years	30 years
Holland & Barrett International | Current portion of long-term debt
Property, Plant and Equipment
Capital lease obligation, current			998			998
Holland & Barrett International | Long-term debt, net of current portion
Property, Plant and Equipment
Long-term capital lease obligation less current installments			46,442			46,442
Holland & Barrett International | Property, plant and equipment
Property, Plant and Equipment
Deferred gain associated with sale-lease-back		$ 16,972
APAs
Property, Plant and Equipment
Accelerated depreciation charges				$ 20,203		20,203
Land
Property, Plant and Equipment
Property, plant and equipment, gross			51,466			51,466	66,833
Buildings and leasehold improvements
Property, Plant and Equipment
Property, plant and equipment, gross			256,439			$ 256,439	279,112
Buildings and leasehold improvements | Minimum
Property, Plant and Equipment
Depreciation and amortization period						4 years
Buildings and leasehold improvements | Maximum
Property, Plant and Equipment
Depreciation and amortization period						40 years
Building under capital lease arrangement
Property, Plant and Equipment
Property, plant and equipment, gross			30,564			$ 30,564
Less accumulated depreciation and amortization			(340)			$ (340)
Depreciation and amortization period						30 years
Machinery and equipment
Property, Plant and Equipment
Property, plant and equipment, gross			153,561			$ 153,561	163,095
Machinery and equipment | Minimum
Property, Plant and Equipment
Depreciation and amortization period						3 years
Machinery and equipment | Maximum
Property, Plant and Equipment
Depreciation and amortization period						13 years
Furniture and fixtures
Property, Plant and Equipment
Property, plant and equipment, gross			147,107			$ 147,107	121,907
Furniture and fixtures | Minimum
Property, Plant and Equipment
Depreciation and amortization period						3 years
Furniture and fixtures | Maximum
Property, Plant and Equipment
Depreciation and amortization period						10 years
Computer software and equipment
Property, Plant and Equipment
Property, plant and equipment, gross			177,976			$ 177,976	140,628
Computer software and equipment | Minimum
Property, Plant and Equipment
Depreciation and amortization period						3 years
Computer software and equipment | Maximum
Property, Plant and Equipment
Depreciation and amortization period						7 years
Transportation equipment
Property, Plant and Equipment
Property, plant and equipment, gross			7,874			$ 7,874	6,138
Transportation equipment | Minimum
Property, Plant and Equipment
Depreciation and amortization period						3 years
Transportation equipment | Maximum
Property, Plant and Equipment
Depreciation and amortization period						4 years
Construction in progress
Property, Plant and Equipment
Property, plant and equipment, gross			$ 41,354			$ 41,354	$ 22,769