Share-Based Compensation (Stock Options) (Details) - Stock Options [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Dec. 26, 2018	Dec. 27, 2017	Dec. 28, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Contractual life	P10Y
Options granted	0	0	0
Intrinsic value of the options exercised	$ 4,900	$ 2,300	$ 1,400
Options [Roll Forward]:
Outstanding, beginning of year	900,000
Exercised	(398,000)
Outstanding, end of year	502,000	900,000
Exercisable, end of year	502,000
Weighted-Average Exercise Price [Roll Forward]:
Outstanding, beginning of year	$ 3.04
Exercised	3.08
Outstanding, end of year	3.02	$ 3.04
Exercisable, end of year	$ 3.02
Weighted-Average Remaining Contractual Life and Aggregate Intrinsic Value:
Outstanding, end of year, weighted-average remaining contractual life	1 year 6 months
Exercisable, end of year, weighted-average remaining contractual life	1 year 6 months
Outstanding, end of year, aggregate intrinsic value	$ 6,649
Exercisable, end of year, aggregate intrinsic value	$ 6,649

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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