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Accumulated Other Comprehensive Income Attributable to SMP- Schedule of Reclassifications Out of Accumulated Other Comprehensive Income (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Derivative cash flow hedge (gain) loss $ 3,145 $ 3,621 $ 7,964 $ 10,766
Postretirement benefit plans unrecognized (gain) loss (2,129) (1,732) (5,147) (2,759)
Total before income tax (36,123) (32,917) (73,927) (74,723)
Income tax expense (9,267) (7,995) (18,718) (18,656)
Total reclassifications attributable to SMP [1] (3,810) $ (6,659) (29,697) $ (27,714)
Reclassification out of Accumulated Other Comprehensive Income        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Total before income tax (676)   (2,024)  
Income tax expense (176)   (528)  
Total reclassifications attributable to SMP (500)   (1,496)  
Reclassification out of Accumulated Other Comprehensive Income | Cash Flow Hedge        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Derivative cash flow hedge (gain) loss (671)   (2,010)  
Reclassification out of Accumulated Other Comprehensive Income | Postretirement Benefit Plans        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Postretirement benefit plans unrecognized (gain) loss $ (5)   $ (14)  
[1] Throughout this Form 10-Q, “SMP” refers to Standard Motor Products, Inc. and subsidiaries.