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Segment Reporting (Schedule of Segment Reporting Information, by Segment) (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2016 | Mar. 31, 2015 | Dec. 31, 2015
Net Sales: |  |  |  |
Total net sales |  | $ 162,616 | $ 162,825 |
Income (Loss) Before Income Taxes: |  |  |  |
Total operating income (loss) |  | 8,506 | 3,126 |
Total income before income taxes |  | 6,954 | 2,250 |
Interest Expense, net: |  |  |  |
Interest expense, net |  | 1,514 | 1,278 |
Capital Expenditures: |  |  |  |
Capital expenditures |  | 6,817 | 8,490 |
Total Assets: |  |  |  |
Total assets |  | 393,726 |  | $ 364,252
Continuing Operations [Member] |  |  |  |
Net Sales: |  |  |  |
Total net sales |  | 162,616 | 162,825 |
Depreciation and Amortization: |  |  |  |
Total depreciation and amortization | [1] | 5,269 | 6,116 |
Interest Expense, net: |  |  |  |
Interest expense, net |  | 1,514 | 1,278 |
Capital Expenditures: |  |  |  |
Capital expenditures |  | 6,817 | 8,490 |
Total Assets: |  |  |  |
Total assets |  | 393,726 |  | 364,252
Operating Segments [Member] | Continuing Operations [Member] |  |  |  |
Income (Loss) Before Income Taxes: |  |  |  |
Total operating income (loss) |  | 8,506 | 3,126 |
Intersegment Eliminations [Member] | Continuing Operations [Member] |  |  |  |
Net Sales: |  |  |  |
Total net sales |  | (7,560) | (5,654) |
Total Assets: |  |  |  |
Total assets |  | (248,019) |  | (249,789)
Electronics [Member] |  |  |  |
Net Sales: |  |  |  |
Total net sales |  | 59,663 | 61,398 |
Electronics [Member] | Operating Segments [Member] | Continuing Operations [Member] |  |  |  |
Net Sales: |  |  |  |
Total net sales |  | 52,636 | 56,432 |
Income (Loss) Before Income Taxes: |  |  |  |
Total operating income (loss) |  | 3,820 | 3,424 |
Depreciation and Amortization: |  |  |  |
Total depreciation and amortization |  | 1,040 | 956 |
Interest Expense, net: |  |  |  |
Interest expense, net |  | 39 | 45 |
Capital Expenditures: |  |  |  |
Capital expenditures |  | 3,131 | 1,938 |
Total Assets: |  |  |  |
Total assets |  | 110,540 |  | 97,443
Electronics [Member] | Inter-Segment [Member] | Continuing Operations [Member] |  |  |  |
Net Sales: |  |  |  |
Total net sales |  | 7,027 | 4,966 |
Control Devices [Member] |  |  |  |
Net Sales: |  |  |  |
Total net sales |  | 92,901 | 80,558 |
Control Devices [Member] | Operating Segments [Member] | Continuing Operations [Member] |  |  |  |
Net Sales: |  |  |  |
Total net sales |  | 92,368 | 79,870 |
Income (Loss) Before Income Taxes: |  |  |  |
Total operating income (loss) |  | 13,517 | 9,605 |
Depreciation and Amortization: |  |  |  |
Total depreciation and amortization |  | 2,309 | 2,459 |
Interest Expense, net: |  |  |  |
Interest expense, net |  | 61 | 85 |
Capital Expenditures: |  |  |  |
Capital expenditures |  | 2,727 | 4,035 |
Total Assets: |  |  |  |
Total assets |  | 145,383 |  | 127,649
Control Devices [Member] | Inter-Segment [Member] | Continuing Operations [Member] |  |  |  |
Net Sales: |  |  |  |
Total net sales |  | 533 | 688 |
Corporate [Member] | Continuing Operations [Member] |  |  |  |
Interest Expense, net: |  |  |  |
Interest expense, net |  | 664 | 728 |
Capital Expenditures: |  |  |  |
Capital expenditures |  | 105 | 1,144 |
Total Assets: |  |  |  |
Total assets | [2] | 280,641 |  | 288,806
Corporate [Member] | Operating Segments [Member] | Continuing Operations [Member] |  |  |  |
Income (Loss) Before Income Taxes: |  |  |  |
Total operating income (loss) | [3] | (5,714) | (7,253) |
Depreciation and Amortization: |  |  |  |
Total depreciation and amortization |  | 70 | 14 |
PST [Member] |  |  |  |
Net Sales: |  |  |  |
Total net sales |  | 17,612 | 26,523 |
PST [Member] | Operating Segments [Member] | Continuing Operations [Member] |  |  |  |
Net Sales: |  |  |  |
Total net sales |  | 17,612 | 26,523 |
Income (Loss) Before Income Taxes: |  |  |  |
Total operating income (loss) |  | (3,117) | (2,650) |
Depreciation and Amortization: |  |  |  |
Total depreciation and amortization |  | 1,850 | 2,687 |
Interest Expense, net: |  |  |  |
Interest expense, net |  | 750 | 420 |
Capital Expenditures: |  |  |  |
Capital expenditures |  | 854 | $ 1,373 |
Total Assets: |  |  |  |
Total assets |  | $ 105,181 |  | $ 100,143
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, 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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