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COMPONENTS OF THE COMPANY'S CONSOLIDATED BALANCE SHEETS Property and Equipment (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Property, Plant and Equipment [Line Items] |  |  |
Property and Equipment, Gross | $ 290,005 | $ 257,437 |
Depreciation | 18,374 | 16,812 | $ 16,464
Accumulated depreciation | $ 178,300 | $ 162,141 |
Property and Equipment [Member] | Geographic Concentration Risk [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Concentration Risk, Percentage | 10.00% | 10.00% | 10.00%
Property and Equipment [Member] | Geographic Concentration Risk [Member] | United States of America |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and Equipment, Gross | $ 159,500 | $ 155,100 | $ 150,100
Property and Equipment [Member] | Geographic Concentration Risk [Member] | THAILAND |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Concentration Risk, Percentage | 12.00% | 12.00% | 12.00%
Land |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and Equipment, Gross | $ 20,288 | $ 20,288 |
Construction-in-progress |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and Equipment, Gross | 15,353 | 6,880 |
Building and improvements |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and Equipment, Gross | 52,655 | 52,156 |
Machinery and equipment |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and Equipment, Gross | 151,269 | 132,162 |
Computer software and hardware and office furniture and fixtures |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and Equipment, Gross | $ 50,440 | $ 45,951 |
Minimum [Member] | Building and improvements |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and Equipment, Useful Life | 4 years |  |
Minimum [Member] | Machinery and equipment |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and Equipment, Useful Life | 2 years |  |
Minimum [Member] | Computer software and hardware and office furniture and fixtures |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and Equipment, Useful Life | 4 years |  |
Maximum [Member] | Building and improvements |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and Equipment, Useful Life | 40 years |  |
Maximum [Member] | Machinery and equipment |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and Equipment, Useful Life | 8 years |  |
Maximum [Member] | Computer software and hardware and office furniture and fixtures |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and Equipment, Useful Life | 7 years |  |

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- Definition Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.14) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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