CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 27, 2023	Sep. 28, 2022
OPERATING ACTIVITIES
Net income (loss) (including amounts attributable to non-controlling interests)	$ 13,737	$ (14,896)
Adjustments to reconcile net income (loss) to net cash provided by operating activities
Depreciation and amortization expense	66,704	53,589
Amortization of debt issuance costs	786	786
Amortization of cloud computing asset	1,320	1,080
Non-cash operating lease cost	49,775	43,159
Equity-based compensation	11,220	10,155
Deferred income taxes	7,092	12,215
Non-cash interest expense	94	181
Gain on sale of equity securities	(81)	0
Net amortization of discount on held-to-maturity securities	939	0
Impairment and loss on disposal of assets	2,098	1,697
Unrealized loss on equity securities	0	400
Changes in operating assets and liabilities:
Accounts receivable	(12)	1,840
Inventories	(424)	(146)
Prepaid expenses and other current assets	(3,056)	(4,767)
Other assets	(4,750)	(5,966)
Accounts payable	(5,064)	(2,069)
Accrued expenses	(6,424)	(17,783)
Accrued wages and related liabilities	555	3,052
Other current liabilities	(2,757)	4,376
Operating lease liabilities	(41,725)	(32,558)
Other long-term liabilities	2,442	(10)
NET CASH PROVIDED BY OPERATING ACTIVITIES	90,591	54,335
INVESTING ACTIVITIES
Purchases of property and equipment	(113,033)	(94,797)
Purchases of held-to-maturity securities	(94,019)	0
Purchases of equity securities	(690)	(415)
Sales of equity securities	81,478	0
NET CASH USED IN INVESTING ACTIVITIES	(126,264)	(95,212)
FINANCING ACTIVITIES
Payments on principal of finance leases	(2,383)	(2,260)
Distributions paid to non-controlling interest holders	(131)	(389)
Proceeds from stock option exercises	631	334
Employee withholding taxes related to net settled equity awards	(2,942)	(2,214)
NET CASH USED IN FINANCING ACTIVITIES	(4,825)	(4,529)
Effect of exchange rate changes on cash and cash equivalents	(3)	(2)
DECREASE IN CASH AND CASH EQUIVALENTS	(40,501)	(45,408)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	230,521	302,406
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 190,020	$ 256,998