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ACQUISITIONS (Supplemental Unaudited Pro Forma Information) (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2019 | Apr. 01, 2018
Income per share: |  |
Effective income tax rate reconciliation, percent | 22.80% | 22.10%
Zycron, Inc. |  |
Business Acquisition [Line Items] |  |
Revenues | $ 73,782 | $ 214,659
Gross profit | 19,196 | 54,391
Net income | $ 3,203 | $ 6,992
Income per share: |  |
Basic pro forma (in usd per share) | $ 0.37 | $ 0.80
Diluted pro forma (in usd per share) | $ 0.35 | $ 0.78
Pro Forma |  |
Income per share: |  |
Effective income tax rate reconciliation, percent |  | 36.80%
Pro Forma | Revolving Credit Facility |  |
Income per share: |  |
Line of credit facility, interest rate during period | 4.50% |

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