Condensed Consolidated Statements of Comprehensive (Loss) Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (1,454)	$ 1,235	$ (1,108)	$ 3,216
Adjustments for changes in:
Foreign currency translation	5,852	(3,150)	3,130	(2,113)
Unrecognized employee benefit costs (including effects of foreign currency translation)	(537)	181	(468)	45
Fair value of cash flow hedges	174	19	384	(81)
Reclassification adjustments for items included in net (loss) income:
Amortization of unrecognized employee benefit costs	(177)	(235)	(534)	(728)
Settlements of cash flow hedges	(13)	135	(280)	(52)
Other comprehensive income (loss)	5,299	(3,050)	2,232	(2,929)
Comprehensive income (loss)	3,845	(1,815)	1,124	287
Less: Comprehensive income attributable to noncontrolling interest	924	367	1,702	771
Comprehensive income (loss) attributable to Ampco-Pittsburgh	$ 2,921	$ (2,182)	$ (578)	$ (484)