Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Net Earnings Attributable to SMP [Abstract]
Earnings from continuing operations		$ 63,144	$ 73,042	$ 99,353
Loss from discontinued operations		(28,996)	(17,691)	(8,467)
Net earnings attributable to SMP	[1]	$ 34,148	$ 55,351	$ 90,886
Basic Net Earnings Per Common Share Attributable to SMP [Abstract]
Earnings from continuing operations per common share (in dollars per share)		$ 2.91	$ 3.37	$ 4.49
Loss from discontinued operations per common share (in dollars per share)		(1.34)	(0.82)	(0.39)
Net earnings per common share - Basic (in dollars per share)		$ 1.57	$ 2.55	$ 4.1
Weighted average common shares outstanding (in shares)		21,716,177	21,683,719	22,147,479
Diluted Net Earnings Per Common Share Attributable to SMP [Abstract]
Earnings from continuing operations per common share (in dollars per share)		$ 2.85	$ 3.3	$ 4.39
Loss from discontinued operations per common share (in dollars per share)		(1.31)	(0.8)	(0.37)
Net earnings per common share - Diluted (in dollars per share)		$ 1.54	$ 2.5	$ 4.02
Weighted average common shares outstanding (in shares)		21,716,177	21,683,719	22,147,479
Plus incremental shares from assumed conversions [Abstract]
Dilutive effect of restricted stock and performance-based stock (in shares)		445,000	456,000	469,000
Weighted average common shares outstanding - Diluted (in shares)		22,161,341	22,139,981	22,616,456
Restricted and Performance-Based Shares [Member]
Earnings Per Share [Abstract]
Antidilutive securities excluded from computation of earnings per share (in shares)		280,000	292,000	269,000

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