STOCK-BASED COMPENSATION (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended
Jun. 28, 2020	Jun. 30, 2019	Jun. 28, 2020	Jun. 30, 2019
Share-based Payment Arrangement [Abstract]
Stock-based compensation expense	$ 3,200	$ 3,300	$ 3,900	$ 5,200
Stock-based compensation, benefit	800	800	1,000	1,300
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	3,200	3,300	3,900	5,200
Stock-based compensation, benefit	$ 800	$ 800	$ 1,000	$ 1,300
Performance-Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units granted (in shares)			316,460
Units granted, grant date fair value (in dollars per share)			$ 30.94
Event-Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units granted (in shares)			13,630
Units granted, grant date fair value (in dollars per share)			$ 22.01

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

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-Name Accounting Standards Codification
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Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

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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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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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Net number of non-option equity instruments granted to participants.

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