Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Sep. 30, 2016
Property, Plant and Equipment [Line Items]
Property, Plant And Equipment, Gross	$ 747,779	$ 694,183
Less: accumulated depreciation	(276,684)	(250,527)
Property, Plant And Equipment, Net	471,095	443,656
Land [Member]
Property, Plant and Equipment [Line Items]
Property, Plant And Equipment, Gross	43,270	43,325
Building [Member]
Property, Plant and Equipment [Line Items]
Property, Plant And Equipment, Gross	276,916	251,700
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant And Equipment, Gross	61,626	60,480
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant And Equipment, Gross	94,917	88,943
Computer Systems and Software [Member]
Property, Plant and Equipment [Line Items]
Property, Plant And Equipment, Gross	162,883	154,291
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, Plant And Equipment, Gross	27,735	26,900
Equipment Leased to Other Party [Member]
Property, Plant and Equipment [Line Items]
Property, Plant And Equipment, Gross	73,912	35,968
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, Plant And Equipment, Gross	$ 6,520	$ 32,576