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SIGNIFICANT ACCOUNTING POLICIES - Property (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Property, plant and equipment: |  |  |
Depreciation expense | $ 18,991 | $ 19,627 | $ 20,388
Carrying value of long-lived assets: |  |  |
Impairment charges of long-lived assets | $ 2,371 |  |
Buildings | Minimum |  |  |
Property, plant and equipment: |  |  |
Useful lives | 20 years |  |
Buildings | Maximum |  |  |
Property, plant and equipment: |  |  |
Useful lives | 35 years |  |
Machinery and equipment | Minimum |  |  |
Property, plant and equipment: |  |  |
Useful lives | 5 years |  |
Machinery and equipment | Maximum |  |  |
Property, plant and equipment: |  |  |
Useful lives | 20 years |  |
Selling, Marketing, and Administrative Expense |  |  |
Carrying value of long-lived assets: |  |  |
Impairment charges of long-lived assets | $ 2,371 | $ 0 | $ 0

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- Definition The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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- Definition The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 225 -Section 45 -Paragraph 11 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84241808&loc=d3e92212-112881 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=68055307&loc=d3e2420-110228 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84176398&loc=d3e2921-110230 + Details
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