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COMMON STOCK - Nonvested Restricted Shares Awards (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 26, 2020	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Restricted Awards
Nonvested, beginning balance (in shares)	1,202,895	1,160,079	1,033,626
Granted (in shares)	348,016	318,496	247,068
Vested (in shares)	(177,790)	(224,894)	(107,865)
Forfeited (in shares)	(9,327)	(50,786)	(12,750)
Nonvested, ending balance (in shares)	1,363,794	1,202,895	1,160,079	1,033,626
Weighted Average Grant Date Fair Value
Nonvested, beginning balance (in dollars per share)	$ 29.68	$ 23.32	$ 24.24
Granted (in dollars per share)	47.60	32.60	36.52
Vested (in dollars per share)	22.69	23.42	18.11
Forfeited (in dollars per share)	33.46	24.18	24.19
Nonvested, ending balance (in dollars per share)	$ 35.14	$ 29.68	$ 23.32	$ 24.24
Unrecognized Compensation Expense
Nonvested restricted awards, unrecognized compensation expense	$ 6.3	$ 7.9	$ 7.6	$ 7.1
Nonvested restricted awards, weighted-average period to recognize expense	7 months 13 days	10 months 9 days	1 year 1 month 13 days	1 year 3 months 21 days

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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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Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

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

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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