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Accumulated Other Comprehensive Income Attributable to SMP (Tables) | 12 Months Ended
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Dec. 31, 2025
Equity [Abstract] |
Schedule of Accumulated Other Comprehensive by Component | Accumulated other comprehensive income attributable to SMP consists of the following (in thousands):
| Foreign Currency Translation |  | Cash Flow Hedges ⁽ᵃ⁾ |  | Postretirement Benefit Plans |  | Total
Balance at December 31, 2023 | $ | (8,897) |  |  | $ | 2,899 |  |  | $ | 24 |  |  | $ | (5,974) |
Other comprehensive income before reclassifications | (23,385) |  | ⁽ᵇ⁾ | 2,893 |  |  | — |  |  | (20,492) |
Amounts reclassified from accumulated other comprehensive income | — |  |  | (2,524) |  |  | (18) |  |  | (2,542) |
Net other comprehensive income (loss) | (23,385) |  |  | 369 |  |  | (18) |  |  | (23,034) |
Tax amounts | 2,513 |  |  | 656 |  |  | 7 |  |  | 3,176 |
Balance at December 31, 2024 | $ | (29,769) |  |  | $ | 3,924 |  |  | $ | 13 |  |  | $ | (25,832) |
Other comprehensive income before reclassifications | 38,997 |  | ⁽ᶜ⁾ | (4,210) |  |  | — |  |  | 34,787 |
Amounts reclassified from accumulated other comprehensive income | — |  |  | 1,506 |  |  | (16) |  |  | 1,490 |
Net other comprehensive income (loss) | 38,997 |  |  | (2,704) |  |  | (16) |  |  | 36,277 |
Tax amounts | 6,703 |  |  | 703 |  |  | 6 |  |  | 7,412 |
Balance at December 31, 2025 | $ | 15,931 |  |  | $ | 1,923 |  |  | $ | 3 |  |  | $ | 17,857 |
(a) Includes u nrecognized losses relating to the change in fair value of cash flow interest rate hedges of $2.7 million and $1.4 million and cash settlement receipts of $1.5 million ($1.1 million net of tax) and $2.5 million ($1.9 million, net of tax) in the years ended December 31, 2025 and 2024, respectively. (b) Primarily reflects the depreciation of the Danish kroner and Mexican peso. (c) Primarily reflects the appreciation of the Danish kroner.

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