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Unaudited Quarterly Financial Data (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2019
Gain on disposal		$ 33,599
Control Devices [Member] | Non-core Switches and Connector Product [Member]
Gain on disposal	$ 33,599

X

- Definition

Amount of other income that is infrequent in occurrence or unusual in nature.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=114868883&loc=SL114871943-224233

+ Details

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Period Type:	duration

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- Details

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X

- Details

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