Property, Plant and Equipment - Additional Information (Detail) In Thousands, unless otherwise specified	Dec. 31, 2013 USD ($)	Dec. 31, 2013 GBP (£)
Property Plant And Equipment [Abstract]
Land and Building	$ 3,268	£ 1,974

The cost of land and buildings as of the reporting date that are held as collateral for outstanding obligations as of the reporting date.

No definition available.

Name:	ap_LandAndBuildingsHeldAsCollateral
Namespace Prefix:	ap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant