Share-Based Compensation - (Stock Options) (Details) - Options - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 30, 2020	Dec. 25, 2019	Dec. 26, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Contractual life	10-year
Options granted	0	0	0
Intrinsic value of the options exercised	$ 800	$ 6,600	$ 4,900
Options
Outstanding, beginning of year (in shares)	140,000
Exercised (in shares)	(110,000)
Outstanding, end of year (in shares)	30,000	140,000
Exercisable, end of year (in shares)	30,000
Weighted Average Exercise Price
Outstanding, beginning of year (in dollars per share)	$ 3.89
Exercised (in dollars per share)	3.89
Outstanding, end of year (in dollars per share)	3.89	$ 3.89
Exercisable, end of year (in dollars per share)	$ 3.89
Weighted-Average Remaining Contractual Life and Aggregate Intrinsic Value
Outstanding, end of year, weighted average remaining contractual life	1 month 6 days
Exercisable, end of year, weighted average remaining contractual life	1 month 6 days
Outstanding, end of year, aggregate intrinsic value	$ 305
Exercisable, end of year, aggregate intrinsic value	$ 305