Disposal of Non-Core Products (Disposal of Non-Core Products) (Details) - USD ($) $ in Thousands		3 Months Ended
Apr. 01, 2019	Mar. 31, 2020	Mar. 31, 2019
Asset Purchase Agreement date		Apr. 01, 2019
Proceeds from sale of productive assets	$ 40,000
Selling, general and administrative		$ 29,503	$ 35,910
Non-core Switches and Connector Product [Member] \| Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Disposal group, net sales		0	11,230
Disposal group, operating income			3,112
Control Devices [Member] \| Non-core Switches and Connector Product [Member] \| Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Selling, general and administrative			$ 322
Services provided income per agreement recognized as reduction to selling general and administrative expenses		$ 21

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- Definition

Services provided income per agreement recognized as reduction to selling general and administrative expenses.

+ References

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- Definition

Amount of operating income (loss) attributable to disposal group, including, but not limited to, discontinued operation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 5B
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109222650&loc=SL51721673-107760

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Amount of revenue attributable to disposal group, including, but not limited to, discontinued operation.

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- Definition

The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585

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The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 330
-SubTopic 10
-Section 30
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=68048583&loc=d3e3636-108311

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.4)
-URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227

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