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Business Combinations - Schedule of Business Acquisition Pro Forma Information (Details) - Nissens Automotive - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Business Combination [Line Items]
Net sales	$ 1,704,858	$ 1,615,110
Net earnings attributable to SMP	$ 39,907	$ 18,870

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