Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 28, 2019	Sep. 29, 2018
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	$ 828,810	$ 816,837
Common Stock, Par Value	$ 1.00	$ 1.00
Class A Common Stock
Common Stock, Shares, Authorized	100,000,000	100,000,000
Common Stock, Shares, Issued	43,794,935	43,784,489
Common Stock, Shares, Outstanding	32,268,275	32,486,766
Class B Common Stock
Common Stock, Shares, Authorized	20,000,000	20,000,000
Common Stock, Shares, Issued	7,484,778	7,495,224
Common Stock, Shares, Outstanding	2,426,819	2,311,286