Property, Plant and Equipment (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Property, Plant and Equipment
Property, plant and equipment, gross	$ 800,482	$ 743,386
Less accumulated depreciation and amortization	(203,280)	(171,857)
Property, plant and equipment, net	597,202	571,529
Depreciation and amortization of property, plant and equipment	60,530	64,883	58,311
Land
Property, Plant and Equipment
Property, plant and equipment, gross	66,833	70,597
Buildings and leasehold improvements
Property, Plant and Equipment
Property, plant and equipment, gross	279,112	272,833
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
Machinery and equipment
Property, Plant and Equipment
Property, plant and equipment, gross	163,095	166,810
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	121,907	103,259
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	140,628	81,356
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	6,138	6,044
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	$ 22,769	$ 42,487