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Segment Reporting (Schedule of Segment Reporting Information, by Segment) (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Dec. 31, 2017
Net Sales: |  |  |  |
Total net sales |  | $ 225,930 | $ 204,311 |
Operating Income (Loss) |  |  |  |
Total operating income (loss) |  | 16,847 | 15,164 |
Total income before income taxes |  | 16,613 | 13,744 |
Depreciation and Amortization: |  |  |  |
Total depreciation and amortization | [1] | 7,788 | 6,458 |
Interest Expense, net: |  |  |  |
Interest expense, net |  | 1,354 | 1,410 |
Capital Expenditures: |  |  |  |
Capital expenditures |  | 10,505 | 7,265 |
Total Assets: |  |  |  |
Total assets |  | 580,202 |  | $ 559,037
Total long-term assets |  | 261,509 |  | 255,668
Operating Segments [Member] |  |  |  |
Operating Income (Loss) |  |  |  |
Total operating income (loss) |  | 16,847 | 15,164 |
Intersegment Eliminations [Member] |  |  |  |
Net Sales: |  |  |  |
Total net sales |  | (12,655) | (12,139) |
Total Assets: |  |  |  |
Total assets |  | (336,109) |  | (335,958)
Electronics [Member] |  |  |  |
Net Sales: |  |  |  |
Total net sales |  | 100,500 | 75,161 |
Electronics [Member] | Operating Segments [Member] |  |  |  |
Net Sales: |  |  |  |
Total net sales | [2] | 90,028 | 63,805 |
Operating Income (Loss) |  |  |  |
Total operating income (loss) | [2] | 7,880 | 5,557 |
Depreciation and Amortization: |  |  |  |
Total depreciation and amortization | [2] | 2,291 | 1,572 |
Interest Expense, net: |  |  |  |
Interest expense, net |  | 34 | 38 |
Capital Expenditures: |  |  |  |
Capital expenditures | [2] | 2,773 | 2,351 |
Total Assets: |  |  |  |
Total assets |  | 276,252 |  | 252,324
Electronics [Member] | Inter-Segment [Member] |  |  |  |
Net Sales: |  |  |  |
Total net sales |  | 10,472 | 11,356 |
Control Devices [Member] |  |  |  |
Net Sales: |  |  |  |
Total net sales |  | 117,538 | 119,656 |
Control Devices [Member] | Operating Segments [Member] |  |  |  |
Net Sales: |  |  |  |
Total net sales |  | 115,357 | 118,873 |
Operating Income (Loss) |  |  |  |
Total operating income (loss) |  | 17,879 | 19,084 |
Depreciation and Amortization: |  |  |  |
Total depreciation and amortization |  | 2,795 | 2,699 |
Interest Expense, net: |  |  |  |
Interest expense, net |  | 19 | 54 |
Capital Expenditures: |  |  |  |
Capital expenditures |  | 5,746 | 3,447 |
Total Assets: |  |  |  |
Total assets |  | 174,608 |  | 164,632
Control Devices [Member] | Inter-Segment [Member] |  |  |  |
Net Sales: |  |  |  |
Total net sales |  | 2,181 | 783 |
Corporate [Member] |  |  |  |
Interest Expense, net: |  |  |  |
Interest expense, net |  | 963 | 746 |
Capital Expenditures: |  |  |  |
Capital expenditures | [3] | 727 | 583 |
Total Assets: |  |  |  |
Total assets | [3] | 366,349 |  | 377,657
Corporate [Member] | Operating Segments [Member] |  |  |  |
Operating Income (Loss) |  |  |  |
Total operating income (loss) | [4] | (9,062) | (10,056) |
Depreciation and Amortization: |  |  |  |
Total depreciation and amortization |  | 197 | 99 |
PST [Member] |  |  |  |
Net Sales: |  |  |  |
Total net sales |  | 20,547 | 21,633 |
PST [Member] | Operating Segments [Member] |  |  |  |
Net Sales: |  |  |  |
Total net sales |  | 20,545 | 21,633 |
Operating Income (Loss) |  |  |  |
Total operating income (loss) |  | 150 | 579 |
Depreciation and Amortization: |  |  |  |
Total depreciation and amortization |  | 2,505 | 2,088 |
Interest Expense, net: |  |  |  |
Interest expense, net |  | 338 | 572 |
Capital Expenditures: |  |  |  |
Capital expenditures |  | 1,259 | 884 |
Total Assets: |  |  |  |
Total assets |  | 99,102 |  | 100,382
PST [Member] | Inter-Segment [Member] |  |  |  |
Net Sales: |  |  |  |
Total net sales |  | 2 |  |
North America [Member] |  |  |  |
Net Sales: |  |  |  |
Total net sales |  | 124,429 | 123,386 |
Total Assets: |  |  |  |
Total long-term assets |  | 93,615 |  | 89,997
South America [Member] |  |  |  |
Net Sales: |  |  |  |
Total net sales |  | 20,545 | 21,633 |
Total Assets: |  |  |  |
Total long-term assets |  | 57,430 |  | 58,989
Europe and Other [Member] |  |  |  |
Net Sales: |  |  |  |
Total net sales | [2] | 80,956 | $ 59,292 |
Total Assets: |  |  |  |
Total long-term assets |  | $ 110,464 |  | $ 106,682
[1] | These amounts represent depreciation and amortization on property, plant and equipment and certain intangible assets.
[2] | The amount for 2017 includes two months of net sales from the acquisition date of January 31, 2017 related to Orlaco which is disclosed in Note 4
[3] | Assets located at Corporate consist primarily of cash, intercompany loan receivables, fixed assets for the corporate headquarter building, equity investments and investments in subsidiaries.
[4] | Unallocated Corporate expenses include, among other items, finance, legal, human resources and information technology costs and share-based compensation.

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