Schedule I - Condensed Financial Information of Registrant - Condensed Balance Sheets (Details) - USD ($) $ in Thousands	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Current assets:
Cash and cash equivalents	$ 373,903	$ 39,342	$ 17,132
Accounts receivable, net	57,989	44,475
Prepaid expenses and other current assets	23,484	23,266
Total current assets	566,650	234,639
Total non-current assets	1,766,848	1,798,086
Total assets	2,333,498	2,032,725
Current liabilities:
Long-term debt, less current portion and debt discount	624,611	525,896
Non-current liabilities:
Other non-current liabilities	17,415	13,731
Deferred income taxes, net	80,939	60,146
Total other non-current liabilities	119,182	95,407
Stockholders’ equity:
Common stock, $0.01 par value; 200,000 shares authorized; 82,183 and 80,603 shares issued as of January 2, 2021 and December 28, 2019, respectively; 81,239 and 79,678 shares outstanding as of January 2, 2021 and December 28, 2019, respectively	821	805
Additional paid-in capital	795,697	700,121
Accumulated other comprehensive loss	(4,400)	(3,814)
Retained earnings	142,880	107,132
Treasury stock, at cost; 944 and 925 shares as of January 2, 2021 and December 28, 2019, respectively	(28,496)	(27,807)
Total stockholders’ equity	906,502	776,437	$ 743,154	$ 654,600
Total liabilities and stockholders’ equity	2,333,498	2,032,725
Parent Company
Current assets:
Cash and cash equivalents	10	55
Accounts receivable, net	1,409	534
Prepaid expenses and other current assets	5	0
Total current assets	1,424	589
Deferred income taxes	0	320
Investment in subsidiary	1,268,846	804,443
Total non-current assets	1,268,846	804,763
Total assets	1,270,270	805,352
Current liabilities:
Other current liabilities	1,341	50
Long-term debt, less current portion and debt discount	309,377	0
Non-current liabilities:
Other non-current liabilities	36,308	28,865
Deferred income taxes, net	16,742	0
Total other non-current liabilities	53,050	28,865
Stockholders’ equity:
Common stock, $0.01 par value; 200,000 shares authorized; 82,183 and 80,603 shares issued as of January 2, 2021 and December 28, 2019, respectively; 81,239 and 79,678 shares outstanding as of January 2, 2021 and December 28, 2019, respectively	821	805
Additional paid-in capital	795,697	700,121
Accumulated other comprehensive loss	(4,400)	(3,814)
Retained earnings	142,880	107,132
Treasury stock, at cost; 944 and 925 shares as of January 2, 2021 and December 28, 2019, respectively	(28,496)	(27,807)
Total stockholders’ equity	906,502	776,437
Total liabilities and stockholders’ equity	$ 1,270,270	$ 805,352