Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 2,149	$ (6,720)	$ 1,999	$ (4,829)
Adjustments for changes in:
Foreign currency translation	157	6,577	(406)	10,702
Unrecognized employee benefit costs (including effects of foreign currency translation)	5	(681)	11	(1,080)
Fair value of cash flow hedges	(87)	18	76	798
Reclassification adjustments for items included in net income (loss):
Amortization of unrecognized employee benefit costs	(164)	(258)	(231)	(323)
Settlement of cash flow hedges	(101)	(281)	(169)	(340)
Other comprehensive (loss) income	(190)	5,375	(719)	9,757
Comprehensive income (loss)	1,959	(1,345)	1,280	4,928
Less: Comprehensive income attributable to noncontrolling interest	926	784	1,854	1,604
Comprehensive income (loss) attributable to Ampco-Pittsburgh	$ 1,033	$ (2,129)	$ (574)	$ 3,324