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Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended						4 Months Ended		12 Months Ended
	Sep. 07, 2019	Jun. 15, 2019	Mar. 23, 2019	Sep. 08, 2018	Jun. 16, 2018	Mar. 24, 2018	Dec. 28, 2019	Dec. 29, 2018	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Income Tax Disclosure [Abstract]
Tax expense at statutory federal rate									$ 2,518	$ 4,303	$ 11,673
State and local tax, net of federal expense									785	1,245	720
Windfalls from share-based compensation									(369)	(331)	(412)
Impact of Federal Rate Change									0	0	(6,156)
Valuation allowance									117	192	(126)
Other									192	42	224
Total income tax provision	$ 2,246	$ 2,151	$ (986)	$ 2,284	$ 2,149	$ (436)	$ (168)	$ 1,455	$ 3,243	$ 5,451	$ 5,923