Consolidated Balance Sheets (Parenthetical) $ in Thousands	Sep. 24, 2021 USD ($) vote $ / shares shares	Sep. 25, 2020 USD ($) vote $ / shares shares
Allowance for doubtful accounts | $	$ 8,744
Contract with customer, asset, allowance for credit loss | $	$ 208	$ 0
Class A Common Stock [Member]
Common stock, par value (usd per share) | $ / shares	$ 0.001	$ 0.001
Common stock voting right per share (votes per share) | vote	1	1
Common Stock, Shares Authorized	500,000,000	500,000,000
Common Stock, Shares, Issued	64,986,316	64,167,725
Common Stock, Shares, Outstanding	64,986,316	64,167,725
Class B Common Stock [Member]
Common stock, par value (usd per share) | $ / shares	$ 0.001	$ 0.001
Common stock voting right per share (votes per share) | vote	10	10
Common Stock, Shares Authorized	500,000,000	500,000,000
Common Stock, Shares, Issued	36,086,779	36,128,720
Common Stock, Shares, Outstanding	36,086,779	36,128,720