RESTRUCTURING AND ASSET IMPAIRMENTS - Severance and Retention Costs For RMS Facility by Classification on the Consolidated Statements of Income (Details) - USD ($)
$ in Thousands

RESTRUCTURING AND ASSET IMPAIRMENTS - Severance and Retention Costs For RMS Facility by Classification on the Consolidated Statements of Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 7,568	$ 4,778	$ 17,879
Cost of services provided and products sold (excluding amortization of intangible assets)
Restructuring Cost and Reserve [Line Items]
Restructuring costs	950	2,873	14,142
Selling, general and administrative
Restructuring Cost and Reserve [Line Items]
Restructuring costs	6,618	1,905	3,737
Severance and Transition Costs
Restructuring Cost and Reserve [Line Items]
Restructuring costs	7,520	3,849	8,454
Severance and Transition Costs \| Cost of services provided and products sold (excluding amortization of intangible assets)
Restructuring Cost and Reserve [Line Items]
Restructuring costs	923	1,944	4,717
Severance and Transition Costs \| Selling, general and administrative
Restructuring Cost and Reserve [Line Items]
Restructuring costs	6,597	1,905	3,737
Asset Impairments and Other Costs
Restructuring Cost and Reserve [Line Items]
Restructuring costs	48	929	4,809
Asset Impairments and Other Costs \| Cost of services provided and products sold (excluding amortization of intangible assets)
Restructuring Cost and Reserve [Line Items]
Restructuring costs	27	929	4,809
Asset Impairments and Other Costs \| Selling, general and administrative
Restructuring Cost and Reserve [Line Items]
Restructuring costs	21	0	$ 0
RMS
Restructuring Cost and Reserve [Line Items]
Restructuring costs	1,983	18,145
RMS \| Cost of services provided and products sold (excluding amortization of intangible assets)
Restructuring Cost and Reserve [Line Items]
Restructuring costs	1,669	18,078
RMS \| Selling, general and administrative
Restructuring Cost and Reserve [Line Items]
Restructuring costs	314	67
RMS \| Severance and Transition Costs
Restructuring Cost and Reserve [Line Items]
Restructuring costs	1,161	429
RMS \| Severance and Transition Costs \| Cost of services provided and products sold (excluding amortization of intangible assets)
Restructuring Cost and Reserve [Line Items]
Restructuring costs	847	362
RMS \| Severance and Transition Costs \| Selling, general and administrative
Restructuring Cost and Reserve [Line Items]
Restructuring costs	314	67
RMS \| Asset Impairments and Other Costs
Restructuring Cost and Reserve [Line Items]
Restructuring costs	822	17,716
RMS \| Asset Impairments and Other Costs \| Cost of services provided and products sold (excluding amortization of intangible assets)
Restructuring Cost and Reserve [Line Items]
Restructuring costs	822	17,716
RMS \| Asset Impairments and Other Costs \| Selling, general and administrative
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 0	$ 0