Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2021	Sep. 23, 2020	Sep. 29, 2021	Sep. 23, 2020
Revenue:
Total operating revenue	$ 103,794	$ 71,644	$ 290,535	$ 208,500
Costs of company restaurant sales, excluding depreciation and amortization:
Product costs	11,430	7,106	31,149	21,541
Payroll and benefits	17,404	11,925	47,339	37,070
Occupancy	3,013	2,638	8,707	8,529
Other operating expenses	6,722	5,701	19,351	15,954
Total costs of company restaurant sales	38,569	27,370	106,546	83,094
Costs of franchise and license revenue, excluding depreciation and amortization	27,469	24,073	79,962	68,487
General and administrative expenses	16,497	13,694	50,992	34,589
Depreciation and amortization	3,822	4,048	11,380	12,252
Operating (gains), losses and other charges, net	(215)	(781)	204	2,319
Total operating costs and expenses, net	86,142	68,404	249,084	200,741
Operating income	17,652	3,240	41,451	7,759
Interest expense, net	3,671	4,422	12,014	13,320
Other nonoperating expense (income), net	(2,368)	(8,477)	(16,165)	3,851
Income (loss) before income taxes	16,349	7,295	45,602	(9,412)
Provision for (benefit from) income taxes	4,084	818	10,984	(1,937)
Net income (loss)	$ 12,265	$ 6,477	$ 34,618	$ (7,475)
Basic net income (loss) per share (in dollars per share)	$ 0.19	$ 0.10	$ 0.53	$ (0.13)
Diluted net income (loss) per share (in dollars per share)	$ 0.19	$ 0.10	$ 0.53	$ (0.13)
Basic weighted average shares outstanding (in shares)	65,447	63,793	65,413	59,350
Diluted weighted average shares outstanding (in shares)	65,829	64,027	65,814	59,350
Company restaurant sales
Revenue:
Total operating revenue	$ 46,470	$ 27,849	$ 127,611	$ 85,268
Franchise and license revenue
Revenue:
Total operating revenue	$ 57,324	$ 43,795	$ 162,924	$ 123,232