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COMPONENTS OF THE COMPANY'S CONSOLIDATED BALANCE SHEETS Property and Equipment (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Property, Plant and Equipment [Line Items] |  |  |
Property and Equipment, Gross | $ 317,020 | $ 309,303 |
Accumulated depreciation | 200,401 | 195,186 |
Depreciation | $ 19,190 | $ 18,918 | $ 18,374
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 | $ 160,700 | $ 167,600 | $ 159,500
Property and Equipment [Member] | Geographic Concentration Risk [Member] | THAILAND |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Concentration Risk, Percentage | 14.00% | 12.00% | 12.00%
Land |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and Equipment, Gross | $ 21,790 | $ 20,288 |
Construction-in-progress |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and Equipment, Gross | 18,604 | 21,696 |
Building and improvements |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and Equipment, Gross | 55,785 | 53,610 |
Machinery and equipment |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and Equipment, Gross | 168,576 | 160,028 |
Computer software and hardware and office furniture and fixtures |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and Equipment, Gross | $ 52,265 | $ 53,681 |
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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