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Supplemental Financial Information (Restructuring and Impairment Charges) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | $ 12,348 | $ 948 | $ 2,532
Impairment charges |  |  |
Fixed assets impairment charges | 587 |  | 1,506
Other impairment charges | 52 | 0 | 0
Impairment charges | 639 | 1,537 | 1,506
Total restructuring and impairment charges | 12,987 | 2,485 | 4,038
Advanced Connectivity Solutions |  |  |
Impairment charges |  |  |
Fixed assets impairment charges |  | 1,537 |
Impairment charges | 600 | 1,500 | 1,500
Manufacturing footprint optimization |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 12,348 | 0 | 0
Facility consolidation |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 0 | 948 | 1,982
Global headquarters relocation |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | $ 0 | $ 0 | $ 550

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