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RESTRUCTURING AND ASSET IMPAIRMENT - Restructuring Costs by Related to RMS Restructuring Initiative (Details) - USD ($) | 3 Months Ended | 24 Months Ended
--- | --- | ---
Mar. 30, 2019 | Mar. 31, 2018 | Dec. 29, 2018
Restructuring Cost and Reserve [Line Items] |  |  |
Total severance and transition costs | $ 1,549,000 | $ 638,000 |
Cost of services provided and products sold (excluding amortization of intangible assets) |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Total severance and transition costs | 1,416,000 | 585,000 |
Selling, general and administrative |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Total severance and transition costs | 133,000 | 53,000 |
Severance and Transition Costs |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Total severance and transition costs | 400,000 | 616,000 |
Severance and Transition Costs | Cost of services provided and products sold (excluding amortization of intangible assets) |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Total severance and transition costs | 267,000 | 563,000 |
Severance and Transition Costs | Selling, general and administrative |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Total severance and transition costs | 133,000 | 53,000 |
Asset Impairments and Other Costs |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Total severance and transition costs | 1,149,000 | 22,000 |
Asset Impairments and Other Costs | Cost of services provided and products sold (excluding amortization of intangible assets) |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Total severance and transition costs | 1,149,000 | 22,000 |
Asset Impairments and Other Costs | Selling, general and administrative |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Total severance and transition costs | 0 | 0 |
RMS |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Total severance and transition costs | 301,000 | 0 | $ 20,100,000
RMS | Severance and Transition Costs |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Total severance and transition costs |  |  | $ 1,200,000
2017 RMS Restructuring | RMS |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Total severance and transition costs | $ 0 | 1,038,000 |
2017 RMS Restructuring | RMS | Cost of services provided and products sold (excluding amortization of intangible assets) |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Total severance and transition costs |  | 868,000 |
2017 RMS Restructuring | RMS | Selling, general and administrative |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Total severance and transition costs |  | 170,000 |
2017 RMS Restructuring | RMS | Severance and Transition Costs |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Total severance and transition costs |  | 523,000 |
2017 RMS Restructuring | RMS | Severance and Transition Costs | Cost of services provided and products sold (excluding amortization of intangible assets) |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Total severance and transition costs |  | 353,000 |
2017 RMS Restructuring | RMS | Severance and Transition Costs | Selling, general and administrative |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Total severance and transition costs |  | 170,000 |
2017 RMS Restructuring | RMS | Asset Impairments and Other Costs |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Total severance and transition costs |  | 515,000 |
2017 RMS Restructuring | RMS | Asset Impairments and Other Costs | Cost of services provided and products sold (excluding amortization of intangible assets) |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Total severance and transition costs |  | 515,000 |
2017 RMS Restructuring | RMS | Asset Impairments and Other Costs | Selling, general and administrative |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Total severance and transition costs |  | $ 0 |

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