Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 27, 2023	Dec. 27, 2022
Condensed Consolidated Balance Sheets
Receivables, allowance for doubtful accounts (in dollars)	$ 51	$ 50
Property and equipment, accumulated depreciation (in dollars)	1,019,637	968,036
Intangible assets, accumulated amortization (in dollars)	$ 19,426	$ 17,905
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	66,843,456	66,973,311
Common stock, shares outstanding	66,843,456	66,973,311