FAIR VALUE - Fair Value of Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 30, 2019	Dec. 29, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	$ 2,521	$ 45,982
Other assets:
Life insurance policies	27,335	24,541
Total assets measured at fair value	29,856	70,523
Other current liabilities measured at fair value:
Contingent consideration	2,497	3,033
Foreign currency forward contract		1,319
Total liabilities measured at fair value		4,352
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Other assets:
Life insurance policies	0	0
Total assets measured at fair value	0	0
Other current liabilities measured at fair value:
Contingent consideration	0	0
Foreign currency forward contract		0
Total liabilities measured at fair value		0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	2,521	45,982
Other assets:
Life insurance policies	27,335	24,541
Total assets measured at fair value	29,856	70,523
Other current liabilities measured at fair value:
Contingent consideration	0	0
Foreign currency forward contract		1,319
Total liabilities measured at fair value		1,319
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Other assets:
Life insurance policies	0	0
Total assets measured at fair value	0	0
Other current liabilities measured at fair value:
Contingent consideration	$ 2,497	3,033
Foreign currency forward contract		0
Total liabilities measured at fair value		$ 3,033