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Segment Reporting (Schedule of Segment Reporting Information, by Segment) (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2017 | Mar. 31, 2016 | Dec. 31, 2016
Net Sales: |  |  |  |
Total net sales |  | $ 204,311 | $ 162,616 |
Operating Income (Loss) |  |  |  |
Total operating income (loss) |  | 15,164 | 8,506 |
Total income before income taxes |  | 13,744 | 6,954 |
Interest Expense, net: |  |  |  |
Interest expense, net |  | 1,410 | 1,514 |
Capital Expenditures: |  |  |  |
Capital expenditures |  | 7,265 | 6,817 |
Total Assets: |  |  |  |
Total assets |  | 519,546 |  | $ 394,529
Continuing Operations [Member] |  |  |  |
Net Sales: |  |  |  |
Total net sales |  | 204,311 | 162,616 |
Depreciation and Amortization: |  |  |  |
Total depreciation and amortization | [1] | 6,458 | 5,269 |
Interest Expense, net: |  |  |  |
Interest expense, net |  | 1,410 | 1,514 |
Capital Expenditures: |  |  |  |
Capital expenditures |  | 7,265 | 6,817 |
Total Assets: |  |  |  |
Total assets |  | 519,546 |  | 394,529
Operating Segments [Member] | Continuing Operations [Member] |  |  |  |
Operating Income (Loss) |  |  |  |
Total operating income (loss) |  | 15,164 | 8,506 |
Intersegment Eliminations [Member] | Continuing Operations [Member] |  |  |  |
Net Sales: |  |  |  |
Total net sales |  | (12,139) | (7,560) |
Total Assets: |  |  |  |
Total assets |  | (331,717) |  | (250,494)
Electronics [Member] |  |  |  |
Net Sales: |  |  |  |
Total net sales |  | 75,161 | 59,663 |
Electronics [Member] | Operating Segments [Member] | Continuing Operations [Member] |  |  |  |
Net Sales: |  |  |  |
Total net sales |  | 63,805 | 52,636 |
Operating Income (Loss) |  |  |  |
Total operating income (loss) |  | 5,557 | 3,820 |
Depreciation and Amortization: |  |  |  |
Total depreciation and amortization |  | 1,572 | 1,040 |
Interest Expense, net: |  |  |  |
Interest expense, net |  | 38 | 39 |
Capital Expenditures: |  |  |  |
Capital expenditures |  | 2,351 | 3,131 |
Total Assets: |  |  |  |
Total assets |  | 214,390 |  | 99,964
Electronics [Member] | Inter-Segment [Member] | Continuing Operations [Member] |  |  |  |
Net Sales: |  |  |  |
Total net sales |  | 11,356 | 7,027 |
Control Devices [Member] |  |  |  |
Net Sales: |  |  |  |
Total net sales |  | 119,656 | 92,901 |
Control Devices [Member] | Operating Segments [Member] | Continuing Operations [Member] |  |  |  |
Net Sales: |  |  |  |
Total net sales |  | 118,873 | 92,368 |
Operating Income (Loss) |  |  |  |
Total operating income (loss) |  | 19,084 | 13,517 |
Depreciation and Amortization: |  |  |  |
Total depreciation and amortization |  | 2,699 | 2,309 |
Interest Expense, net: |  |  |  |
Interest expense, net |  | 54 | 61 |
Capital Expenditures: |  |  |  |
Capital expenditures |  | 3,447 | 2,727 |
Total Assets: |  |  |  |
Total assets |  | 162,218 |  | 150,623
Control Devices [Member] | Inter-Segment [Member] | Continuing Operations [Member] |  |  |  |
Net Sales: |  |  |  |
Total net sales |  | 783 | 533 |
Corporate [Member] | Continuing Operations [Member] |  |  |  |
Interest Expense, net: |  |  |  |
Interest expense, net |  | 746 | 664 |
Capital Expenditures: |  |  |  |
Capital expenditures | [2] | 583 | 105 |
Total Assets: |  |  |  |
Total assets | [2] | 364,760 |  | 287,031
Corporate [Member] | Operating Segments [Member] | Continuing Operations [Member] |  |  |  |
Operating Income (Loss) |  |  |  |
Total operating income (loss) | [3] | (10,056) | (5,714) |
Depreciation and Amortization: |  |  |  |
Total depreciation and amortization |  | 99 | 70 |
PST [Member] |  |  |  |
Net Sales: |  |  |  |
Total net sales |  | 21,633 | 17,612 |
PST [Member] | Operating Segments [Member] | Continuing Operations [Member] |  |  |  |
Net Sales: |  |  |  |
Total net sales |  | 21,633 | 17,612 |
Operating Income (Loss) |  |  |  |
Total operating income (loss) |  | 579 | (3,117) |
Depreciation and Amortization: |  |  |  |
Total depreciation and amortization |  | 2,088 | 1,850 |
Interest Expense, net: |  |  |  |
Interest expense, net |  | 572 | 750 |
Capital Expenditures: |  |  |  |
Capital expenditures |  | 884 | 854 |
Total Assets: |  |  |  |
Total assets |  | 109,895 |  | $ 107,405
PST [Member] | Inter-Segment [Member] | Continuing Operations [Member] |  |  |  |
Net Sales: |  |  |  |
Total net sales |  |  |  |
[1] | These amounts represent depreciation and amortization on property, plant and equipment and certain intangible assets.
[2] | Assets located at Corporate consist primarily of cash, intercompany loan receivables, capital expenditures for the new headquarter building, equity investments and investments in subsidiaries.
[3] | Unallocated Corporate expenses include, among other items, finance, legal, human resources and information technology costs as well as share-based compensation.

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