Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Net earnings (loss) attributable to SMP [Abstract]
Continuing operations		$ 17,980	$ 18,358	$ 27,843	$ 31,056
Discontinued operations		(917)	(9,221)	(1,956)	(10,001)
Net earnings attributable to SMP	[1]	$ 17,063	$ 9,137	$ 25,887	$ 21,055
Basic net earnings (loss) per common share attributable to SMP [Abstract]
Continuing operations (in dollars per share)		$ 0.83	$ 0.85	$ 1.27	$ 1.43
Discontinued operations (in dollars per share)		(0.05)	(0.43)	(0.09)	(0.46)
Diluted net earnings (loss) per common share attributable to SMP [Abstract]
Continuing operations (in dollars per share)		0.81	0.83	1.25	1.4
Discontinued operations (in dollars per share)		$ (0.04)	$ (0.42)	$ (0.09)	$ (0.45)
Weighted average common shares outstanding, basic (in shares)		21,767,526	21,689,067	21,845,678	21,649,562
Dilutive effect of restricted stock and performance-based stock (in shares)		418,000	494,000	432,000	490,000
Weighted average common shares outstanding, diluted (in shares)		22,185,536	22,183,489	22,277,590	22,139,708
Restricted and Performance-Based Shares [Member]
Earnings Per Share [Abstract]
Antidilutive securities excluded from computation of earnings per share (in shares)		290,000	273,000	286,000	286,000

[1] Throughout this Form 10-Q, “SMP” refers to Standard Motor Products, Inc. and subsidiaries.