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DERIVATIVE FINANCIAL INSTRUMENTS (Details) lb in Millions | 6 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jun. 29, 2019 USD ($) lb | Dec. 31, 2018 USD ($) lb | Mar. 08, 2018 USD ($)
Interest Rate Swap, Through December 2021 |  |  |
Derivative Financial Instruments |  |  |
Unrealized gain (loss) recorded in AOCI | $ (2,400,000) | $ 200,000 |
Interest Rate Swap, Through December 2021 | Derivative contracts designated as hedging instruments |  |  |
Derivative Financial Instruments |  |  |
Aggregate notional amount | 253,500,000 |  | $ 260,000,000.0
Long-term liability to recognize fair value of swaps | $ 3,200,000 |  |
Long-term asset to recognize fair value of swaps |  | 200,000 |
Interest Rate Swap, Through December 2021 | Derivative contracts designated as hedging instruments | Term loan |  |  |
Derivative Financial Instruments |  |  |
Fixed rate (percentage) | 2.535% |  |
FX Forward Contracts |  |  |
Derivative Financial Instruments |  |  |
Aggregate notional amount | $ 22,300,000 | 14,400,000 |
Unrealized gain (loss) recorded in AOCI | 0 | 0 |
Embedded Derivative Financial Instruments | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Financial Instruments |  |  |
Aggregate notional amount | 400,000 |  |
Commodity Contracts |  |  |
Derivative Financial Instruments |  |  |
Unrealized gain (loss) recorded in AOCI | 300,000 | 800,000 |
Fair value of derivative contract - asset | $ 400,000 |  |
Fair value of derivative contract - liability |  | $ 1,000,000.0 |
Commodity Contracts | Derivative contracts designated as hedging instruments |  |  |
Derivative Financial Instruments |  |  |
Notional amount of commodity contracts (in pounds of copper) | lb | 2.8 | 3.9 |

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