Condensed Consolidated Statements of Comprehensive (Loss) Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 1,891	$ (2,206)
Adjustments for changes in:
Foreign currency translation	4,125	(2,445)
Unrecognized employee benefit costs (including effects of foreign currency translation)	(399)	93
Fair value of cash flow hedges	780	52
Reclassification adjustments for items included in net income (loss):
Amortization of unrecognized employee benefit costs	(65)	(183)
Settlement of cash flow hedges	(59)	11
Other comprehensive income (loss)	4,382	(2,472)
Comprehensive income (loss)	6,273	(4,678)
Less: Comprehensive income attributable to noncontrolling interest	820	307
Comprehensive income (loss) attributable to Ampco-Pittsburgh	$ 5,453	$ (4,985)