SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 26, 2021	Jun. 27, 2020	Jun. 26, 2021	Jun. 27, 2020
Accounting Policies [Abstract]
United States	$ 57,090	$ 54,237	$ 108,245	$ 107,737
Foreign	20,666	(18,621)	40,374	(14,695)
Earnings before income taxes	$ 77,756	$ 35,616	$ 148,619	$ 93,042

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The portion of earnings or loss from continuing operations before income taxes that is attributable to domestic operations.

+ References

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-Publisher FASB
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- Definition

The portion of earnings or loss from continuing operations before income taxes that is attributable to foreign operations, which is defined as Income or Loss generated from operations located outside the entity's country of domicile.

+ References

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- Definition

Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments.

+ References

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