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Contract Assets - Summary of Changes in Contract Assets (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Change in Contract with Customer, Asset and Liability [Abstract] |  |  |  |
Balance at beginning of the period | $ 5,489 | $ 5,510 | $ 8,486 | $ 4,452
Satisfaction of existing contracts | (17,471) | (12,245) | (33,794) | (21,405)
Additional revenue earned on new and existing contracts | 18,218 | 15,963 | 31,454 | 26,232
Other, primarily changes in foreign currency exchange rates | 251 |  | 341 | (51)
Balance at end of the period | $ 6,487 | $ 9,228 | $ 6,487 | $ 9,228

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- Definition Contract asset net. + References No definition available. + Details
Name: | ap_ContractAssetNet
Namespace Prefix: | ap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Contract assets additional revenue earned on new and existing contracts. + References No definition available. + Details
Name: | ap_ContractAssetsAdditionalRevenueEarnedOnNewAndExistingContracts
Namespace Prefix: | ap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Contract assets other primarily changes in foreign currency exchange rates. + References No definition available. + Details
Name: | ap_ContractAssetsOtherPrimarilyChangesInForeignCurrencyExchangeRates
Namespace Prefix: | ap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Contract assets satisfaction of existing contracts. + References No definition available. + Details
Name: | ap_ContractAssetsSatisfactionOfExistingContracts
Namespace Prefix: | ap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_ChangeInContractWithCustomerAssetAndLiabilityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration