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Acquisitions - Additional Information (Details) - USD ($) |  |  |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | ---
Dec. 06, 2019 | Oct. 25, 2019 | Apr. 15, 2019 | Apr. 05, 2019 | Mar. 29, 2020 | Mar. 31, 2019 | Dec. 31, 2021
Business Acquisition [Line Items] |  |  |  |  |  |  |
Purchase price, net of cash acquired |  |  |  |  | $ (590,000) | $ 0 |
Severance, restructuring, and acquisition integration costs |  |  |  |  | 3,619,000 |  |
Amortization of intangibles |  |  |  |  | 16,185,000 | 18,164,000 |
Net income (loss) |  |  |  |  | $ (11,219,000) | 25,178,000 |
Opterna International Corp. |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Percentage of outstanding shares acquired |  |  | 100.00% |  |  |  |
Purchase price, net of cash acquired |  |  | $ 51,700,000 |  |  |  |
Acquisition price paid |  |  | 45,900,000 |  |  |  |
Maximum earnout consideration |  |  | 25,000,000.0 |  |  |  |
Estimated earnout consideration |  |  | 5,800,000 |  |  |  |
Receivables |  |  | 5,308,000 |  |  |  |
Property, plant, and equipment |  |  | 1,328,000 |  |  |  |
Tax basis in acquired goodwill |  |  | $ 0 |  |  |  |
Net income attributable to Belden common stockholders |  |  |  |  |  | $ 19,243,000 |
Noncontrolling interest, purchase price |  | $ 800,000 |  |  |  |  |
Payments to acquire interest in subsidiaries |  | $ 400,000 |  |  |  |  |
Opterna International Corp. | Forecast |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Payments to acquire interest in subsidiaries |  |  |  |  |  |  | $ 400,000
Special Product Compay |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Purchase price, net of cash acquired | $ 22,500,000 |  |  |  |  |  |
Suttle, Inc. Asset Acquisition |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Asset acquisition, consideration transferred |  |  |  | $ 5,000,000.0 |  |  |

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