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COMPONENTS OF THE COMPANY'S CONSOLIDATED BALANCE SHEETS (Property and Equipment) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Property, Plant and Equipment [Line Items] |  |  |
Property and Equipment, Gross | $ 380,172 | $ 317,020 |
Accumulated depreciation | (213,984) | (200,401) |
Property, Plant and Equipment, Net | 166,188 | 116,619 |
Depreciation | $ 23,743 | $ 19,190 | $ 18,918
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 | $ 167,000 | $ 160,700 | $ 167,600
Property and Equipment [Member] | Geographic Concentration Risk [Member] | THAILAND |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Concentration Risk, Percentage | 14.00% | 14.00% | 12.00%
Property and Equipment [Member] | Geographic Concentration Risk [Member] | MALAYSIA |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Concentration Risk, Percentage | 14.00% |  |
Land |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and Equipment, Gross | $ 22,189 | $ 21,790 |
Construction-in-progress |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and Equipment, Gross | 34,886 | 18,604 |
Building and improvements |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and Equipment, Gross | 64,808 | 55,785 |
Machinery and equipment |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and Equipment, Gross | 202,698 | 168,576 |
Computer software and hardware and office furniture and fixtures |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and Equipment, Gross | $ 55,591 | $ 52,265 |
Minimum [Member] | Building and improvements |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and Equipment, Useful Life | 4 years | 4 years | 4 years
Minimum [Member] | Machinery and equipment |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and Equipment, Useful Life | 2 years | 2 years | 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 | 4 years | 4 years
Maximum [Member] | Building and improvements |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and Equipment, Useful Life | 40 years | 40 years | 40 years
Maximum [Member] | Machinery and equipment |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and Equipment, Useful Life | 8 years | 8 years | 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 | 7 years | 7 years

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