Quarterly Financial Data (Unaudited) - Schedule of Quarterly Financial Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						4 Months Ended		12 Months Ended
	Sep. 10, 2019	Jun. 18, 2019	Mar. 26, 2019	Sep. 11, 2018	Jun. 19, 2018	Mar. 27, 2018	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2019	Jan. 01, 2019	Jan. 02, 2018
Condensed Financial Statements, Captions [Line Items]
Total revenue	$ 120,198	$ 121,460	$ 114,197	$ 117,830	$ 117,813	$ 112,554	$ 157,096	$ 157,293	$ 512,951	$ 505,490	$ 471,456
Income from operations	(3,450)	4,517	3,659	9,195	7,804	6,338	(111,769)	10,696	(107,043)	34,033	41,247
Net (loss) income	$ (7,669)	$ 2,092	$ 1,425	$ 5,874	$ 4,210	$ 3,229	$ (114,133)	$ 5,646	$ (118,285)	$ 18,959	$ 49,871
(Loss) earnings per share:
Basic (in dollars per share)	$ (0.21)	$ 0.06	$ 0.04	$ 0.15	$ 0.11	$ 0.08	$ (3.08)	$ 0.15	$ (3.20)	$ 0.50	$ 1.29
Diluted (in dollars per share)	$ (0.21)	$ 0.06	$ 0.04	$ 0.15	$ 0.11	$ 0.08	$ (3.08)	$ 0.15	$ (3.20)	$ 0.49	$ 1.25