Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	[4]
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	[1]	$ 3,980	$ (3,300)	[2],[3]
Adjustments for changes in:
Foreign currency translation		(11,848)	(2,951)
Unrecognized employee benefit costs (including effects of foreign currency translation)		6,825	15,263
Fair value of cash flow hedges		(512)	774
Amortization of unrecognized employee benefit costs		1,115	1,826
Settlement of cash flow hedges		387	(1,086)
Other comprehensive (loss) income	[1]	(4,033)	13,826
Comprehensive (loss) income	[1]	(53)	10,526
Less: Comprehensive (loss) income attributable to noncontrolling interest		(163)	798
Comprehensive (loss) income attributable to Ampco-Pittsburgh		$ 110	$ 9,728

[1] Retained deficit as of January 1, 2021, net loss for 2021 and retained deficit as of December 31, 2021 were adjusted to include inventory costs using the FIFO basis of costing. See Note 2.   See Notes to Consolidated Financial Statements.

[2] Costs of products sold (excluding depreciation and amortization) and subsequent subtotals and totals along with net loss per share for 2021 were adjusted to include inventory costs using the FIFO basis of costing. See Note 2.

[3] Net loss and the change in inventories for 2021 were adjusted to include inventory costs using the FIFO basis of costing. See Note 2.   See Notes to Consolidated Financial Statements.

[4] Net loss for 2021 and subsequent subtotals and totals were adjusted to include inventory costs using the FIFO basis of costing. See Note 2