Basis of Presentation and Summary of Significant Accounting Policies - Impact of Adoption of Topic 606 - Consolidated Balance Sheet (Details) - Successor - USD ($) $ in Thousands	Jan. 01, 2019	Jan. 02, 2018	Jan. 03, 2017	Dec. 29, 2015
Current liabilities:
Accounts payable	$ 19,877	$ 18,759
Other accrued liabilities	34,785	35,257
Current portion of capital lease obligations and deemed landlord financing liabilities	1,033	1,415
Total current liabilities	55,695	55,431
Long-term debt, capital lease obligations and deemed landlord financing liabilities, excluding current portion, net	178,664	170,639
Deferred income taxes	69,471	68,574
Other non-current liabilities	32,852	31,431
Total liabilities	336,682	326,075
Shareholders’ equity:
Preferred stock	0	0
Common stock	4	4
Additional paid-in capital	336,941	349,334
Accumulated other comprehensive income	180	14
Retained earnings	85,149	66,897
Total shareholders’ equity	422,274	416,249	$ 377,333	$ 368,377
Total liabilities and shareholders’ equity	758,956	$ 742,324
Adjustments for Prior Revenue Recognition Standards | Accounting Standards Update 2014-09
Current liabilities:
Accounts payable	0
Other accrued liabilities	0
Current portion of capital lease obligations and deemed landlord financing liabilities	0
Total current liabilities	0
Long-term debt, capital lease obligations and deemed landlord financing liabilities, excluding current portion, net	0
Deferred income taxes	370
Other non-current liabilities	(1,369)
Total liabilities	(999)
Shareholders’ equity:
Preferred stock	0
Common stock	0
Additional paid-in capital	0
Accumulated other comprehensive income	0
Retained earnings	999
Total shareholders’ equity	999
Total liabilities and shareholders’ equity	0
Amounts Under Previous Standards
Current liabilities:
Accounts payable	19,877
Other accrued liabilities	34,785
Current portion of capital lease obligations and deemed landlord financing liabilities	1,033
Total current liabilities	55,695
Long-term debt, capital lease obligations and deemed landlord financing liabilities, excluding current portion, net	178,664
Deferred income taxes	69,841
Other non-current liabilities	31,483
Total liabilities	335,683
Shareholders’ equity:
Preferred stock	0
Common stock	4
Additional paid-in capital	336,941
Accumulated other comprehensive income	180
Retained earnings	86,148
Total shareholders’ equity	423,273
Total liabilities and shareholders’ equity	$ 758,956