XML 40 R36.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Inventories (Details 2) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2013 | Mar. 31, 2012
Inventories |  |
Interest credits and advertising assistance | $ 8,339 | $ 5,265

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