Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Net Earnings Attributable to SMP [Abstract]
Earnings from continuing operations		$ 24,859	$ 23,140	$ 55,915	$ 64,494
Loss from discontinued operations		(18,200)	(14,294)	(28,201)	(17,076)
Net earnings attributable to SMP	[1]	$ 6,659	$ 8,846	$ 27,714	$ 47,418
Basic Net Earnings Per Common Share Attributable to SMP [Abstract]
Earnings from continuing operations per common share (in dollars per share)		$ 1.14	$ 1.08	$ 2.58	$ 2.97
Loss from discontinued operations per common share (in dollars per share)		(0.83)	(0.67)	(1.3)	(0.79)
Net earnings per common share - Basic (in dollars per share)		$ 0.31	$ 0.41	$ 1.28	$ 2.18
Weighted average common shares outstanding (in shares)		21,727,119	21,427,393	21,675,699	21,719,281
Diluted Net Earnings Per Common Share Attributable to SMP [Abstract]
Earnings from continuing operations per common share (in dollars per share)		$ 1.12	$ 1.06	$ 2.52	$ 2.91
Loss from discontinued operations per common share (in dollars per share)		(0.82)	(0.66)	(1.27)	(0.77)
Net earnings per common share - Diluted (in dollars per share)		$ 0.3	$ 0.4	$ 1.25	$ 2.14
Weighted average common shares outstanding (in shares)		21,727,119	21,427,393	21,675,699	21,719,281
Plus incremental shares from assumed conversions [Abstract]
Dilutive effect of restricted stock and performance-based stock (in shares)		527,000	421,000	522,000	434,000
Weighted average common shares outstanding - Diluted (in shares)		22,253,723	21,847,602	22,198,131	22,153,348
Restricted and Performance-Based Shares [Member]
Earnings Per Share [Abstract]
Antidilutive securities excluded from computation of earnings per share (in shares)		242,000	299,000	273,000	281,000

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