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Organization and Summary of Significant Accounting Policies (Goodwill and Intangible Assets) (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 USD ($) Segment | Dec. 31, 2017 USD ($)
Indefinite-lived Intangible Assets [Line Items] |  |
Number of reportable segments | Segment | 4 |
Current Fiscal Year End Date | --12-31 |
Goodwill | $ 264,885 | $ 237,107
Indefinite-lived other intangible asset | 4,525 | 4,738
Definite-lived other intangible assets | 172,483 | 155,540
Advanced Connectivity Solutions |  |
Indefinite-lived Intangible Assets [Line Items] |  |
Goodwill | $ 51,693 | 51,693
Elastomeric Material Solutions |  |
Indefinite-lived Intangible Assets [Line Items] |  |
Sensitivity analysis, Discount rate used | 11.25% |
Goodwill | $ 142,589 | 111,575
Elastomeric Material Solutions | Measurement Input, Long-term Revenue Growth Rate |  |
Indefinite-lived Intangible Assets [Line Items] |  |
Sensitivity analysis, Terminal year growth rate | 0.059 |
Curamik |  |
Indefinite-lived Intangible Assets [Line Items] |  |
Indefinite-lived other intangible asset | $ 4,500 |
Elastomer Component Division |  |
Indefinite-lived Intangible Assets [Line Items] |  |
Sensitivity analysis, Discount rate used | 12.90% |
Elastomer Component Division | Measurement Input, Long-term Revenue Growth Rate |  |
Indefinite-lived Intangible Assets [Line Items] |  |
Sensitivity analysis, Terminal year growth rate | 0.049 |
Power Electronics Solutions |  |
Indefinite-lived Intangible Assets [Line Items] |  |
Goodwill | $ 68,379 | 71,615
Other |  |
Indefinite-lived Intangible Assets [Line Items] |  |
Goodwill | 2,224 | $ 2,224
ACS |  |
Indefinite-lived Intangible Assets [Line Items] |  |
Definite-lived other intangible assets | 7,900 |
EMS |  |
Indefinite-lived Intangible Assets [Line Items] |  |
Definite-lived other intangible assets | 152,200 |
Curamik |  |
Indefinite-lived Intangible Assets [Line Items] |  |
Definite-lived other intangible assets | $ 12,400 |

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