SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Income Taxes (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Dec. 30, 2017	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Income Tax Contingency [Line Items]
United States		$ 15,596	$ 28,886	$ 99,697	$ 115,082
Foreign		486	21,675	18,482	59,210
Earnings before income taxes		16,082	$ 50,561	118,179	$ 174,292
Unremitted foreign earnings		393,962		393,962
Decrease in unremitted foreign earnings				6,038
Transition tax obligation		$ 9,436		9,436
Decrease in transition tax obligation				$ 454
Federal
Income Tax Contingency [Line Items]
Provisional income tax expense	$ 10,713
Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Transition Tax for Accumulated Foreign Earnings, Increase (Decrease) To Provisional Income Tax Expense	340
State
Income Tax Contingency [Line Items]
Provisional income tax expense	$ 1,300