Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 1,235	$ 1,411	$ 3,216	$ 4,250
Adjustments for changes in:
Foreign currency translation	(3,150)	(8,745)	(2,113)	(19,787)
Unrecognized employee benefit costs (including effects of foreign currency translation)	181	891	45	1,441
Fair value of cash flow hedges	19	(251)	(81)	(809)
Reclassification adjustments for items included in net income:
Amortization of unrecognized employee benefit costs	(235)	281	(728)	833
Settlements of cash flow hedges	135	367	(52)	108
Other comprehensive loss	(3,050)	(7,457)	(2,929)	(18,214)
Comprehensive (loss) income	(1,815)	(6,046)	287	(13,964)
Less: Comprehensive income (loss) attributable to noncontrolling interest	367	(269)	771	(625)
Comprehensive loss attributable to Ampco-Pittsburgh	$ (2,182)	$ (5,777)	$ (484)	$ (13,339)