Consolidated Statements Of Operations And Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Jan. 01, 2023	Jan. 02, 2022
Revenue	$ 1,876,504	$ 1,730,440	$ 1,652,370
Costs and expenses:
Cost of sales	522,163	534,238	499,685
Restaurant wages and related expenses	608,582	585,204	549,933
Lessee, Operating Leases, Rent Expense, Net	128,804	125,481	122,662
Other restaurant operating expenses	292,564	274,557	257,774
Advertising expense	76,243	69,389	65,433
General and administrative	105,930	88,072	83,660
Depreciation and amortization	74,161	78,068	80,798
Impairment and other lease charges	7,609	21,877	4,470
Other expense (income)	(6,058)	(926)	(1,186)
Total operating expenses	1,809,998	1,775,960	1,663,229
Income (loss) from operations	66,506	(45,520)	(10,859)
Interest Expense	29,112	30,841	28,791
Loss on extinguishment of debt	(875)	0	8,538
Income (loss) before income taxes	38,269	(76,361)	(48,188)
Provision (benefit) for income taxes	4,473	(789)	(5,159)
Net income (loss)	$ 33,796	$ (75,572)	$ (43,029)
Basic net income (loss) per share (dollars per share)	$ 0.53	$ (1.49)	$ (0.86)
Diluted net income (loss) per share (dollars per share)	$ 0.53	$ (1.49)	$ (0.86)
Basic weighted average common shares outstanding	51,530,360	50,718,387	49,899,274
Diluted weighted average common shares outstanding	62,412,573	50,718,387	49,899,274
Other comprehensive income (loss), net of tax:
Net income (loss)	$ 33,796	$ (75,572)	$ (43,029)
Change in postretirement benefit obligations, net of tax	(3,382)	7,291	4,426
Comprehensive income (loss)	$ 30,414	$ (68,281)	$ (38,603)
Revenue, Product and Service [Extensible Enumeration]	Restaurant sales	Restaurant sales	Restaurant sales