SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 25, 2021	Sep. 26, 2020	Sep. 25, 2021	Sep. 26, 2020
Accounting Policies [Abstract]
United States	$ 47,784	$ 33,610	$ 156,028	$ 141,347
Foreign	20,909	18,978	61,284	4,283
Earnings before income taxes	$ 68,693	$ 52,588	$ 217,312	$ 145,630

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

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+ Details