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

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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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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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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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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Intrinsic value of vested award under share-based payment arrangement. Excludes share and unit options.

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Share Based Compensation - PSU (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Jan. 08, 2021	Sep. 28, 2021	Sep. 29, 2020	Sep. 28, 2021	Sep. 29, 2020
Share-based Compensation
Expense compensation		$ 10,980	$ 7,580	$ 30,797	$ 22,070
PSUs
Share-based Compensation
Vesting period				1 year
Intrinsic value of awards vested (in dollars)		0	$ 0	$ 400	$ 5,400
Vested (in shares)	(5,199)
Expense compensation		1,800		5,900
Unrecognized compensation cost of unvested stock awards (in dollars)		$ 2,000		$ 2,000
Unrecognized Compensation Cost Recognized Weighted Average Period				3 months 18 days