Property, Plant & Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 28, 2018	Sep. 29, 2017	Sep. 30, 2016
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 876,463	$ 790,619
Less: accumulated depreciation	(362,281)	(305,344)
Property, Plant And Equipment, Net	514,182	485,275
Depreciation	54,800	53,400	$ 52,000
Land [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	43,342	43,364
Building [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	283,474	281,196
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	66,866	65,034
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	111,603	98,437
Computer Systems and Software [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	194,079	173,341
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	30,556	28,118
Cinema equipment provided under operating leases [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	139,201	97,456
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 7,342	$ 3,673