Stock-Based Awards - Stock Options (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 27, 2020	Dec. 29, 2019	Dec. 30, 2018	Dec. 25, 2011
Options (number of shares):
Exercised (shares)	(644,268)	(419,160)	(2,327,046)
Weighted Average Exercise Price (in dollars per share):
Total intrinsic value	$ 21,200	$ 8,600	$ 12,300
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (shares)	0	0	0
Options (number of shares):
Options outstanding at beginning of year (shares)	969,000
Exercised (shares)	(644,000)
Forfeited/Expired (shares)	0
Options outstanding at end of period (shares)	325,000	969,000
Options exercisable at end of period (shares)	325,000
Weighted Average Exercise Price (in dollars per share):
Options outstanding at beginning of year (in dollars per share)	$ 9
Exercised (in dollars per share)	9
Forfeited/Expired (in dollars per share)	0
Options outstanding at end of period (in dollars per share)	8	$ 9
Options exercisable at end of period (in dollars per share)	$ 8
Outstanding weighted average remaining contractual term (in years), beginning of period	1 year	2 years
Outstanding weighted average remaining contractual term (in years), end of period	1 year	2 years
Options exercisable weighted average remaining contractual term (in years)	1 year
Outstanding aggregate intrinsic value, beginning of period	$ 22,534
Outstanding aggregate intrinsic value, end of period	14,225	$ 22,534
Options exercisable aggregate intrinsic value	$ 14,225
2020 Incentive Plan | Equity Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	3 years
Term (in years)	10 years
Director | 2004 Director's Plan | Equity Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (shares)	0
Vesting period (in years)				1 year
Term (in years)				10 years