XML 91 R36.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Inventories (Details 2) (USD $) In Thousands, unless otherwise specified | 6 Months Ended
--- | ---
Jun. 30, 2013 | Jun. 30, 2012
Inventories |  |
Interest credits and advertising assistance | $ 8,797 | $ 7,057

X
- Definition Floor plan interest credits and advertising assistance received from vendors, which reduce the cost of sales. + References No definition available. + Details
Name: | pag_FloorPlanInterestCreditsAndAdvertisingAssistance
Namespace Prefix: | pag_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_InventoryDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration