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Operating Segments and Geographic Information - Reconciliation of Total Reportable Segments' Revenues and EBITDA to Consolidated Revenues and Consolidated Income Before Taxes (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Segment Revenues and Consolidated Revenues | $ 2,606,485 | $ 2,301,260 | $ 1,752,192
Depreciation expense | (46,700) | (43,900) | (39,300)
Amortization of intangibles | (37,860) | (30,630) | (29,041)
Severance, restructuring, and acquisition integration costs | (16,470) | (18,367) | (8,920)
Asset impairments | 0 | (140,461) | (113,007)
Gain on sale of asset | 37,891 | 0 | 0
Consolidated operating income | 363,334 | 263,676 | 150,114
Interest expense, net | (43,554) | (62,693) | (58,903)
Loss on debt extinguishment | 6,392 | 5,715 | 0
Non-operating pension benefit (cost) | 4,005 | 4,476 | (395)
Gain on sale of note receivable | 0 | 27,036 | 0
Consolidated income from continuing operations before taxes | 317,393 | 226,780 | 90,816
Proceeds from disposal of tangible assets | $ 43,534 | 30,234 | 3,161
Impairment, Long-Lived Asset, Held-for-Use, Statement of Income or Comprehensive Income [Extensible Enumeration] | Asset impairments |  |
Proceeds from sale of real estate | $ 42,200 |  |
Gain on sale of real estate | 37,900 |  |
Grass Valley |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Asset impairments |  |  | (113,000)
Reportable Segment |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Total Segment EBITDA | 438,596 | 367,193 | 231,635
Depreciation expense | (46,669) | (43,073) | (39,339)
Amortization of intangibles | (37,860) | (30,630) | (29,041)
Severance, restructuring, and acquisition integration costs | (16,685) | (23,867) | (11,664)
Adjustments related to acquisitions and divestitures | (7,833) | 5,035 | (125)
Amortization of software development intangible assets | (3,875) | (1,579) | (872)
Asset impairments | 0 | (9,283) | 0
Gain on sale of asset |  |  | 0
Consolidated operating income | 363,334 | 263,676 | 150,114
Interest expense, net | (43,554) |  |
Lease guarantees | 10,100 |  |
Inventory adjustment | 2,200 |  |
Collection of receivable previously written off | 4,500 |  |
Deferred compensation - earnout payments |  | 5,800 |
Proceeds from disposal of tangible assets |  | 600 |
Impairment of long lived asset held-for-use |  | 3,600 |
Asset impairments |  | 5,700 |
Reportable Segment | OTN Systems |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Adjustments related to acquisitions and divestitures |  | 2,300 |
Reportable Segment | Opterna International Corp. |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Adjustments related to acquisitions and divestitures |  |  | 100
Reportable Segment | Grass Valley |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Recovery of accounts receivable previously written off |  | 2,200 |
Eliminations |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Consolidated operating income | (231) | (120) | (480)
Segment revenues | Reportable Segment |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Segment Revenues and Consolidated Revenues | $ 2,606,485 | $ 2,301,260 | $ 1,752,192

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