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PRODUCT WARRANTY COSTS (Details) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017
Changes in the carrying amount of product warranty accruals
Balance at beginning of year		$ 22,029	$ 21,053
Accruals for warranties		6,855	8,118
Settlements		(8,064)	(8,672)
Standard And Extended Product Warranty Accrual Foreign Currency Translation Gain Loss and Other Adjustments	[1]	349	2,368
Balance at end of period		$ 21,169	22,867
Air Liquide Welding [Member]
Changes in the carrying amount of product warranty accruals
Standard And Extended Product Warranty Accrual Foreign Currency Translation Gain Loss and Other Adjustments			$ 2,114
[1] At September 30, 2017, Foreign currency translation and other adjustments includes $2,114 in an acquired liability related to the Air Liquide Welding acquisition as discussed in Note 4 to the consolidated financial statements.

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Amount of foreign currency translation gain (loss) and other adjustments which decreases (increases) the standard and extended product warranty accrual.

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 8
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Amount of decrease in the standard and extended product warranty accrual from payments made in cash or in kind to satisfy claims under the terms of the standard and extended product warranty.

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Amount of increase in the standard and extended product warranty accrual from warranties issued.

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