Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Net Earnings Attributable to SMP [Abstract]
Earnings from continuing operations		$ 12,698	$ 20,562
Loss from discontinued operations		(780)	(1,116)
Net earnings attributable to SMP	[1]	$ 11,918	$ 19,446
Basic Net Earnings Per Common Share Attributable to SMP [Abstract]
Earnings from continuing operations per common share (in dollars per share)		$ 0.59	$ 0.94
Loss from discontinued operations per common share (in dollars per share)		(0.04)	(0.06)
Net earnings per common share - Basic (in dollars per share)		$ 0.55	$ 0.88
Weighted average common shares outstanding (in shares)		21,609,618	21,978,507
Diluted Net Earnings Per Common Share Attributable to SMP [Abstract]
Earnings from continuing operations per common share (in dollars per share)		$ 0.57	$ 0.91
Loss from discontinued operations per common share (in dollars per share)		(0.03)	(0.04)
Net earnings per common share - Diluted (in dollars per share)		$ 0.54	$ 0.87
Weighted average common shares outstanding (in shares)		21,609,618	21,978,507
Plus incremental shares from assumed conversions [Abstract]
Dilutive effect of restricted stock and performance-based stock (in shares)		488,000	499,000
Weighted average common shares outstanding - Diluted (in shares)		22,097,750	22,477,819
Restricted and Performance-Based Shares [Member]
Earnings Per Share [Abstract]
Antidilutive securities excluded from computation of earnings per share (in shares)		298,000	259,000

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