Deferred compensation share-based arrangements liability to be recognized in three years.

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Deferred compensation share-based arrangements liability to be recognized in two years

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Aggregate carrying value as of the balance sheet date of the liabilities for stock option plans and other equity-based compensation arrangements payable within one year (or the operating cycle, if longer).

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Aggregate carrying value as of the balance sheet date of the liabilities for stock option plans and other equity-based compensation arrangements.

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No definition available.

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- Definition

Amount of cash inflow from exercise of option under share-based payment arrangement.

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- Definition

Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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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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Number of shares authorized for issuance under share-based payment arrangement.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of share options (or share units) exercised during the current period.

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Equity Compensation - Other (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 27, 2020	Dec. 29, 2019	Dec. 30, 2018
Equity Compensation
Award vesting period, in years	3 years
Stock-based employee compensation expense	$ 16,300	$ 15,300	$ 9,900
Unrecognized compensation cost related to nonvested option awards and restricted stock	16,000
Unrecognized compensation cost related to nonvested option awards and restricted stock, current	10,100
Unrecognized compensation cost related to nonvested option awards and restricted stock to be recognized in two years	4,700
Unrecognized compensation cost related to nonvested option awards and restricted stock to be recognized in three years	$ 1,200
Exercise of stock options (in shares)	541,000	448,000	75,000
Total intrinsic value of the options exercised	$ 13,800	$ 10,600	$ 1,500
Cash received upon exercise of stock options	$ 30,622	$ 16,010	$ 2,699
Omnibus Incentive 2018 Plan
Equity Compensation
Shares of common stock authorized for issuance	4,700,000
Shares of common stock available for future issuance	4,700,000
Omnibus Incentive 2011 Plan
Equity Compensation
Shares of common stock available for future issuance	5,900,000
Options
Equity Compensation
Award vesting period, in years	3 years
Options \| Maximum
Equity Compensation
Award expiration period, in years	10 years
Options \| Omnibus Incentive 2018 Plan
Equity Compensation
Award vesting period, in years	3 years
Options \| Omnibus Incentive 2018 Plan \| Maximum
Equity Compensation
Award expiration period, in years	10 years