Property, Plant, and Equipment (Schedule of Property Plant and Equipment, Net) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Oct. 01, 2018	Sep. 30, 2018
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 1,672,227		$ 1,624,874
Less accumulated depreciation	(613,452)		(564,869)
Property, plant, and equipment, net	1,058,775	$ 1,060,005	1,060,005
Land and Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	94,976		94,146
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	587,541		565,065
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	17,446		17,954
Machinery and Production Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	731,159		668,986
Computer Equipment and Software [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	124,201		124,788
Office furniture and equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	39,934		31,533
Other [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	19,346		19,366
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 57,624		$ 103,036