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Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Business Acquisition, Equity Interests Issued or Issuable [Line Items] |  |  |
Impairment of goodwill | $ 66,487 | $ 0 | $ 0
Goodwill [Roll Forward] |  |  |
Balance at beginning of period | 201,416 | 201,432 |
Purchase price allocation adjustment |  | (2,639) |
Impairment of goodwill | (66,487) | 0 | 0
Exchange rate effects | (627) | 410 |
Balance at end of period | 179,005 | 201,416 | 201,432
Finite-Lived Intangible Assets [Line Items] |  |  |
Intangible assets subject to amortization | 212,347 | 195,008 |
Accumulated amortization | (125,124) | (122,675) |
Net intangible assets subject to amortization | 87,223 | 72,333 |
Intangible assets, net | 87,223 | 72,333 |
Amortization expense (excluding capitalized software) | 11,684 | 9,916 | 8,127
Finite Lived Intangible Assets Future Amortization Expense [Abstract] |  |  |
2025 | 13,074 |  |
2026 | 12,267 |  |
2027 | 9,319 |  |
2028 | 8,346 |  |
2029 | 8,121 |  |
Ametherm [Member] |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill acquired during period | 11,685 |  |
Birkelbach Kondensatortechnik GmbH [Member] |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill acquired during period | 777 |  |
Centerline [Member] |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill acquired during period |  | 2,213 |
Newport wafer fab [Member] |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill acquired during period | 32,241 |  |
MOSFETs [Member] |  |  |
Business Acquisition, Equity Interests Issued or Issuable [Line Items] |  |  |
Impairment of goodwill | 66,487 |  |
Goodwill [Roll Forward] |  |  |
Balance at beginning of period | 34,246 | 36,885 |
Purchase price allocation adjustment |  | (2,639) |
Impairment of goodwill | (66,487) |  |
Exchange rate effects | 0 | 0 |
Balance at end of period | 0 | 34,246 | 36,885
MOSFETs [Member] | Ametherm [Member] |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill acquired during period | 0 |  |
MOSFETs [Member] | Birkelbach Kondensatortechnik GmbH [Member] |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill acquired during period | 0 |  |
MOSFETs [Member] | Centerline [Member] |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill acquired during period |  | 0 |
MOSFETs [Member] | Newport wafer fab [Member] |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill acquired during period | 32,241 |  |
Optoelectronic Components [Member] |  |  |
Business Acquisition, Equity Interests Issued or Issuable [Line Items] |  |  |
Impairment of goodwill | 0 |  |
Goodwill [Roll Forward] |  |  |
Balance at beginning of period | 96,849 | 96,849 |
Purchase price allocation adjustment |  | 0 |
Impairment of goodwill | 0 |  |
Exchange rate effects | 0 | 0 |
Balance at end of period | 96,849 | 96,849 | 96,849
Optoelectronic Components [Member] | Ametherm [Member] |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill acquired during period | 0 |  |
Optoelectronic Components [Member] | Birkelbach Kondensatortechnik GmbH [Member] |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill acquired during period | 0 |  |
Optoelectronic Components [Member] | Centerline [Member] |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill acquired during period |  | 0 |
Optoelectronic Components [Member] | Newport wafer fab [Member] |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill acquired during period | 0 |  |
Resistors [Member] |  |  |
Business Acquisition, Equity Interests Issued or Issuable [Line Items] |  |  |
Impairment of goodwill | 0 |  |
Goodwill [Roll Forward] |  |  |
Balance at beginning of period | 44,506 | 41,883 |
Purchase price allocation adjustment |  | 0 |
Impairment of goodwill | 0 |  |
Exchange rate effects | (627) | 410 |
Balance at end of period | 55,564 | 44,506 | 41,883
Resistors [Member] | Ametherm [Member] |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill acquired during period | 11,685 |  |
Resistors [Member] | Birkelbach Kondensatortechnik GmbH [Member] |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill acquired during period | 0 |  |
Resistors [Member] | Centerline [Member] |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill acquired during period |  | 2,213 |
Resistors [Member] | Newport wafer fab [Member] |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill acquired during period | 0 |  |
Inductors [Member] |  |  |
Business Acquisition, Equity Interests Issued or Issuable [Line Items] |  |  |
Impairment of goodwill | 0 |  |
Goodwill [Roll Forward] |  |  |
Balance at beginning of period | 25,815 | 25,815 |
Purchase price allocation adjustment |  | 0 |
Impairment of goodwill | 0 |  |
Exchange rate effects | 0 | 0 |
Balance at end of period | 25,815 | 25,815 | 25,815
Inductors [Member] | Ametherm [Member] |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill acquired during period | 0 |  |
Inductors [Member] | Birkelbach Kondensatortechnik GmbH [Member] |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill acquired during period | 0 |  |
Inductors [Member] | Centerline [Member] |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill acquired during period |  | 0 |
Inductors [Member] | Newport wafer fab [Member] |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill acquired during period | 0 |  |
Capacitors Segment [Member] |  |  |
Business Acquisition, Equity Interests Issued or Issuable [Line Items] |  |  |
Impairment of goodwill | 0 |  |
Goodwill [Roll Forward] |  |  |
Balance at beginning of period | 0 | 0 |
Purchase price allocation adjustment |  | 0 |
Impairment of goodwill | 0 |  |
Exchange rate effects | 0 | 0 |
Balance at end of period | 777 | 0 | $ 0
Capacitors Segment [Member] | Ametherm [Member] |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill acquired during period | 0 |  |
Capacitors Segment [Member] | Birkelbach Kondensatortechnik GmbH [Member] |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill acquired during period | 777 |  |
Capacitors Segment [Member] | Centerline [Member] |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill acquired during period |  | 0 |
Capacitors Segment [Member] | Newport wafer fab [Member] |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill acquired during period | 0 |  |
Patents and Acquired Technology [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Intangible assets subject to amortization | 23,160 | 26,053 |
Accumulated amortization | (7,316) | (14,931) |
Capitalized Software [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Intangible assets subject to amortization | 62,158 | 62,360 |
Accumulated amortization | (55,476) | (54,203) |
Customer Relationships [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Intangible assets subject to amortization | 103,813 | 83,895 |
Accumulated amortization | (45,053) | (38,664) |
Tradenames [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Intangible assets subject to amortization | 23,216 | 22,300 |
Accumulated amortization | (17,279) | (14,610) |
Other [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Intangible assets subject to amortization | 0 | 400 |
Accumulated amortization | $ 0 | $ (267) |

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