CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Statement of Comprehensive Income [Abstract]
Net earnings	$ 17,285	$ 12,741
Other comprehensive income (loss), net of tax:
Foreign currency translation	(7,373)	12,979
Cash flow hedges	1,344	(836)
Postretirement benefit plans	0	(2)
Total other comprehensive income (loss), net of tax	(6,029)	12,141
Total other comprehensive income	11,256	24,882
Comprehensive income attributable to noncontrolling interest, net of tax:
Net earnings	149	175
Foreign currency translation	164	(36)
Comprehensive income attributable to noncontrolling interest, net of tax	313	139
Comprehensive income attributable to SMP, net of tax	$ 10,943	$ 24,743