Significant Accounting Policies - Estimated Useful Lives of Property and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 25, 2022	Sep. 26, 2021	Sep. 27, 2020
Property, Plant and Equipment [Line Items]
Depreciation Expense	$ 14,365	$ 17,982	$ 15,385
Buildings and improvements | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life (years)	5 years
Buildings and improvements | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life (years)	40 years
Printing presses and insertion equipment | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life (years)	5 years
Printing presses and insertion equipment | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life (years)	25 years
Leasehold improvements | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life (years)	3 years
Leasehold improvements | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life (years)	10 years
Other | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life (years)	3 years
Other | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life (years)	15 years