Pension and Other Postretirement Benefits - Additional Information (Detail) £ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) Location Employee Pension_Plan Customer	Dec. 31, 2021 USD ($)	Dec. 31, 2022 GBP (£) Pension_Plan	Dec. 31, 2021 GBP (£)	Dec. 31, 2020 USD ($)
Defined Benefit Plans And Other Postretirement Benefit Plans [Line Items]
Number of employer locations contributed to the plan | Location	1,700
Multiemployer plan number of employer locations description	Approximately 1,700
Number of employees participate in the plan | Employee	100,000
Multiemployer plan number of employees description	Approximately 100,000
Total amount of assets collected	$ 13,400,000,000
Multiemployer plan pension significant plan asset description	approximately $13.4 billion
Percentage of funded status in excess	83.70%
Multiemployer plans funded status description	approximately 83.7%
Participation of corporation's employees in the plan	Less than 100
Participation of number of corporation's employees in the plan | Employee	100
Percentage of employers contributions	5.00%
Service period to avail existing pension plan	10 years
Increase in projected and accumulated benefit obligations due to 1/4 percentage point decrease in discount rate	$ 5,800,000
Decrease in projected and accumulated benefit obligations due to 1/4 percentage point increase in discount rate	$ 5,800,000
Maximum maturity period of fixed income investments	10 years
Percentage point decrease in the expected long-term rate of return would increase annual pension expense	$ 2,600,000
Percentage point increase in the expected long-term rate of return would decrease annual pension expense	$ 2,600,000
Assumed health care cost trend rate for 2023	6.50%		6.50%
Temporary Investment Funds [Member] | Primary Investment Objective [Member]
Defined Benefit Plans And Other Postretirement Benefit Plans [Line Items]
Target allocation	Achieve a market level of current income while maintaining stability of principal and liquidity.
Temporary Investment Funds [Member] | Investment Strategy [Member]
Defined Benefit Plans And Other Postretirement Benefit Plans [Line Items]
Target allocation	Invests primarily in a diversified portfolio of investment grade money market instruments.
Various Equity Funds [Member] | Primary Investment Objective [Member]
Defined Benefit Plans And Other Postretirement Benefit Plans [Line Items]
Target allocation	Outperform the fund’s related index.
Various Equity Funds [Member] | Investment Strategy [Member]
Defined Benefit Plans And Other Postretirement Benefit Plans [Line Items]
Target allocation	Each fund maintains a diversified holding in common stock of applicable companies (e.g., common stock of small capitalization companies if a small-cap fund, common stock of medium capitalization companies if a mid-cap fund, common stock of foreign corporations if an international fund, etc.).
Various Fixed- Income Funds [Member] | Primary Investment Objective [Member]
Defined Benefit Plans And Other Postretirement Benefit Plans [Line Items]
Target allocation	Achieve a rate of return that matches or exceeds the expected growth in plan liabilities.
Various Fixed- Income Funds [Member] | Investment Strategy [Member]
Defined Benefit Plans And Other Postretirement Benefit Plans [Line Items]
Target allocation	Invests primarily in a diversified portfolio of fixed-income securities of varying maturities or in commingled funds which invest in a diversified portfolio of fixed-income securities of varying maturities.
Alternative Investments - Managed Funds [Member] | Primary Investment Objective [Member]
Defined Benefit Plans And Other Postretirement Benefit Plans [Line Items]
Target allocation	Generate a minimum annual inflation adjusted return of 5% and outperform a traditional 70/30 equities/bond portfolio.
Alternative Investments - Managed Funds [Member] | Investment Strategy [Member]
Defined Benefit Plans And Other Postretirement Benefit Plans [Line Items]
Target allocation	Invests in equities and equity-like asset classes and strategies (such as public equities, venture capital, private equity, real estate, natural resources, and hedged strategies) and fixed-income securities approved by the Retirement Committee.
Alternative Investments - Absolute Return Funds [Member] | Primary Investment Objective [Member]
Defined Benefit Plans And Other Postretirement Benefit Plans [Line Items]
Target allocation	Generate long-term capital appreciation while maintaining a low correlation with the traditional global financial markets.
Alternative Investments - Absolute Return Funds [Member] | Investment Strategy [Member]
Defined Benefit Plans And Other Postretirement Benefit Plans [Line Items]
Target allocation	Invests in a diversified portfolio of alternative investment styles and strategies approved by the Trustees of the UES-UK defined benefit pension plan.
Maximum [Member]
Defined Benefit Plans And Other Postretirement Benefit Plans [Line Items]
Corporation's contributions	$ 300,000	$ 300,000
Contributions expected in 2023	$ 300,000
Defined benefit plan actuarial gain loss percentage	10.00%		10.00%
Minimum [Member]
Defined Benefit Plans And Other Postretirement Benefit Plans [Line Items]
Defined benefit plan actuarial gain loss percentage	10.00%		10.00%
High-quality fixed-income investments maturity	10 years
Foreign Defined Benefits Pension Plans [Member]
Defined Benefit Plans And Other Postretirement Benefit Plans [Line Items]
Fair value of plan assets	$ 41,679,000	71,614,000	£ 34,475	£ 53,008
Accumulated benefit obligations	34,438,000	59,651,000	£ 28,485	£ 44,153
Defined contribution plan contribution required in current year	0	0
Defined contribution plan expected contribution required in 2022 to be fully funded	0
Contributions to defined contribution pension plan	253,000	322,000
Contributions to the defined contribution pension plan expected in 2023	$ 250,000
Number of additional defined benefit pension plans | Pension_Plan	2		2
Foreign Defined Benefits Pension Plans [Member] | Unfunded Plan [Member]
Defined Benefit Plans And Other Postretirement Benefit Plans [Line Items]
Projected benefit obligations	$ 4,881,000	7,356,000
Defined Benefit Pension Plan [Member] | U.S. [Member]
Defined Benefit Plans And Other Postretirement Benefit Plans [Line Items]
Number of defined benefit pension plans | Pension_Plan	2		2
Minimum contributions required	$ 444,000	0
Minimum contributions expected in 2023	339,000
Fair value of plan assets	161,374,000	214,937,000			$ 210,880,000
Accumulated benefit obligations	185,210,000	249,180,000
Voluntary contributions made	1,214,000	403,000
Defined Benefit Pension Plan [Member] | U.S. [Member] | Alternative Investments - Managed Funds [Member]
Defined Benefit Plans And Other Postretirement Benefit Plans [Line Items]
Fair value of plan assets	6,569,000	8,167,000
Defined Benefit Pension Plan [Member] | Foreign Defined Benefits Pension Plans [Member]
Defined Benefit Plans And Other Postretirement Benefit Plans [Line Items]
Fair value of plan assets	41,679,000	71,614,000			$ 66,957,000
Voluntary contributions made	506,000	655,000
Defined Benefit Pension Plan [Member] | Ampco Pittsburgh [Member] | U.S. [Member]
Defined Benefit Plans And Other Postretirement Benefit Plans [Line Items]
Minimum contributions expected in 2023	3,400,000
Voluntary contributions made	3,064,000	2,893,000
Nonqualified Defined Benefit Pension Plan [Member]
Defined Benefit Plans And Other Postretirement Benefit Plans [Line Items]
Accumulated benefit obligations	8,460,000	11,121,000
Fair market value included in other noncurrent assets	3,353,000	4,860,000
Other Postretirement Benefit Plans [Member]
Defined Benefit Plans And Other Postretirement Benefit Plans [Line Items]
Voluntary contributions made	$ 479,000	$ 600,000
Number of subsidiaries having postretirement health care benefits | Customer	2
Percentage decrease in other postretirement benefits in 2025	4.75%		4.75%
Year related to decrease in health care cost trend rate	2028
Other Postretirement Benefit Plans [Member] | Maximum [Member]
Defined Benefit Plans And Other Postretirement Benefit Plans [Line Items]
Monthly reimbursement period	6 years