Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

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- Definition

Fixed interest rate related to the interest rate derivative.

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Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

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- Definition

Nominal mass used to calculate payments on a derivative instrument.

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No definition available.

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- Definition

Amount, after tax and reclassification, of gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness, attributable to parent.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=114867106&loc=d3e637-108580

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- Definition

Fair value as of the balance sheet date of all price risk derivative assets designated as cash flow hedging instruments.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959

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Fair value as of the balance sheet date of all price risk derivative liabilities designated as cash flow hedging instruments.

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DERIVATIVE FINANCIAL INSTRUMENTS (Details) lb in Millions	3 Months Ended	12 Months Ended
DERIVATIVE FINANCIAL INSTRUMENTS (Details) lb in Millions	Mar. 30, 2019 USD ($) lb	Dec. 31, 2018 USD ($)	Dec. 31, 2017 lb	Mar. 08, 2018 USD ($)
Interest Rate Swap, Through December 2021
Derivative Financial Instruments
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax, Parent	$ (700,000)	$ 200,000
Interest Rate Swap, Through December 2021 \| Derivative contracts designated as hedging instruments
Derivative Financial Instruments
Aggregate notional amount	256,800,000			$ 260,000,000
Long-term liability to recognize fair value of swaps	$ 1,000,000
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	$ 20,200,000	14,400,000
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax, Parent	0	0
FX embedded derivatives \| Derivative contracts not designated as hedging instruments
Derivative Financial Instruments
Aggregate notional amount	400,000	400,000
Commodity Contracts
Derivative Financial Instruments
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax, Parent	200,000	(800,000)
Fair value of derivative contract - asset	$ 300,000
Fair value of derivative contract - liability		$ 1,000,000
Commodity Contracts \| Derivative contracts designated as hedging instruments
Derivative Financial Instruments
Notional amount of commodity contracts (in pounds of copper) \| lb	3.2		3.9