Stock-Based Awards - Stock Options (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 29, 2019	Dec. 30, 2018	Dec. 31, 2017
Options (number of shares):
Exercised (shares)	(419,160)	(2,327,046)	(657,704)
Weighted Average Exercise Price (in dollars per share):
Total intrinsic value	$ 8,600	$ 12,300	$ 7,000
Share-based Payment Arrangement, Option
Options (number of shares):
Options outstanding at beginning of year (shares)	1,388,000
Exercised (shares)	(419,000)
Forfeited/Expired (shares)	0
Options outstanding at end of period (shares)	969,000	1,388,000
Options exercisable at end of period (shares)	969,000
Weighted Average Exercise Price (in dollars per share):
Options outstanding at beginning of year (in dollars per share)	$ 9
Exercised (in dollars per share)	11
Forfeited/Expired (in dollars per share)	0
Options outstanding at end of period (in dollars per share)	9	$ 9
Options exercisable at end of period (in dollars per share)	$ 9
Outstanding weighted average remaining contractual term, beginning of period	2 years	2 years
Outstanding weighted average remaining contractual term, end of period	2 years	2 years
Options exercisable weighted average remaining contractual term	2 years
Outstanding aggregate intrinsic value, beginning of period	$ 18,052
Outstanding aggregate intrinsic value, end of period	22,534	$ 18,052
Options exercisable aggregate intrinsic value	$ 22,534