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Comprehensive Income and Accumulated Other Comprehensive Income (Loss) (Tables) | 12 Months Ended
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Dec. 31, 2024
Equity [Abstract] |
Schedule of Components of Other Comprehensive Income (Loss), Net of Tax | The accumulated balances related to each component of other comprehensive income (loss), net of tax, are as follows:
| Foreign Currency Translation Component |  | Pension and Other Postretirement Benefit Plans |  | Accumulated Other Comprehensive Income (Loss)
|  |  | (In thousands) |  |
Balance at December 31, 2022 | $ | (1,944) |  |  | $ | (3,927) |  |  | $ | (5,871) |
Other comprehensive loss attributable to Belden before reclassifications | (24,431) |  |  | (9,696) |  |  | (34,127) |
Amounts reclassified from accumulated other comprehensive income | (139) |  |  | (1,142) |  |  | (1,281) |
Net current period other comprehensive loss attributable to Belden | (24,570) |  |  | (10,838) |  |  | (35,408) |
Balance at December 31, 2023 | $ | (26,514) |  |  | $ | (14,765) |  |  | $ | (41,279) |
Other comprehensive income attributable to Belden before reclassifications | 29,643 |  |  | 8,364 |  |  | 38,007 |
Amounts reclassified from accumulated other comprehensive income | — |  |  | (260) |  |  | (260) |
Net current period other comprehensive income attributable to Belden | 29,643 |  |  | 8,104 |  |  | 37,747 |
Balance at December 31, 2024 | $ | 3,129 |  |  | $ | (6,661) |  |  | $ | (3,532) |
Schedule of Effects of Reclassifications from Accumulated Other Comprehensive Income (Loss) | The following table summarizes the effects of reclassifications from accumulated other comprehensive income (loss):
| Amount Reclassified from Accumulated Other Comprehensive Income (Loss) |  | Affected Line Item in the Consolidated Statements of Operations and Comprehensive Income (Loss)
| (In thousands) |  |
Amortization of pension and other postretirement benefit plan items: |  |  |
Actuarial gains | $ | (521) |  |  | (1) |
Prior service cost | 180 |  |  | (1) |
Total before tax | (341) |  |  |
Tax expense | 81 |  |  |
Total net of tax | $ | (260) |  |  |
(1)The amortization of these accumulated other comprehensive income (loss) components are included in the computation of net periodic benefit costs (see Note 19).

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