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v2.4.1.9

Acquisitions and Dispositions Acquisitions and Dispositions (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013
Allocation of purchase price [Line Items] |  |  |
Business Acquisition, Pro Forma Revenue | $ 10,417 us-gaap_BusinessAcquisitionsProFormaRevenue | $ 9,770 us-gaap_BusinessAcquisitionsProFormaRevenue |
Assets, Current | 2,035,219 us-gaap_AssetsCurrent | 1,967,938 us-gaap_AssetsCurrent |
Inventory, Net | 1,556,705 us-gaap_InventoryNet | 1,542,318 us-gaap_InventoryNet |
Property, Plant and Equipment, Net | 950,388 us-gaap_PropertyPlantAndEquipmentNet | 796,356 us-gaap_PropertyPlantAndEquipmentNet |
Deferred Tax Assets, Gross | 99,265 us-gaap_DeferredTaxAssetsGross | 98,234 us-gaap_DeferredTaxAssetsGross | 2,300 us-gaap_DeferredTaxAssetsGross
Total assets | 4,141,492 us-gaap_Assets | 3,819,478 us-gaap_Assets |
Liabilities, Current | 1,922,199 us-gaap_LiabilitiesCurrent | 1,865,176 us-gaap_LiabilitiesCurrent |
Deferred Tax Liabilities, Gross | 186,044 us-gaap_DeferredIncomeTaxLiabilities | 199,997 us-gaap_DeferredIncomeTaxLiabilities |
Business Acquisition, Pro Forma Net Income (Loss) | 95 us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss | 126 us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss |
Businesses acquired [Member] |  |  |
Allocation of purchase price [Line Items] |  |  |
Assets, Current | 6,601 us-gaap_AssetsCurrent / us-gaap_BusinessAcquisitionAxis = gpi_BusinessesacquiredMember | 26,884 us-gaap_AssetsCurrent / us-gaap_BusinessAcquisitionAxis = gpi_BusinessesacquiredMember |
Inventory, Net | 131,878 us-gaap_InventoryNet / us-gaap_BusinessAcquisitionAxis = gpi_BusinessesacquiredMember | 164,655 us-gaap_InventoryNet / us-gaap_BusinessAcquisitionAxis = gpi_BusinessesacquiredMember |
Property, Plant and Equipment, Net | 80,520 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_BusinessAcquisitionAxis = gpi_BusinessesacquiredMember | 72,328 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_BusinessAcquisitionAxis = gpi_BusinessesacquiredMember |
Intangible Assets, Net (Including Goodwill) | 183,449 us-gaap_IntangibleAssetsNetIncludingGoodwill / us-gaap_BusinessAcquisitionAxis = gpi_BusinessesacquiredMember | 305,876 us-gaap_IntangibleAssetsNetIncludingGoodwill / us-gaap_BusinessAcquisitionAxis = gpi_BusinessesacquiredMember |
Deferred Tax Assets, Gross | 7,265 us-gaap_DeferredTaxAssetsGross / us-gaap_BusinessAcquisitionAxis = gpi_BusinessesacquiredMember |  |
Other Assets |  | 864 us-gaap_OtherAssets / us-gaap_BusinessAcquisitionAxis = gpi_BusinessesacquiredMember |
Total assets | 409,713 us-gaap_Assets / us-gaap_BusinessAcquisitionAxis = gpi_BusinessesacquiredMember | 570,607 us-gaap_Assets / us-gaap_BusinessAcquisitionAxis = gpi_BusinessesacquiredMember |
Liabilities, Current | 37,545 us-gaap_LiabilitiesCurrent / us-gaap_BusinessAcquisitionAxis = gpi_BusinessesacquiredMember | 123,025 us-gaap_LiabilitiesCurrent / us-gaap_BusinessAcquisitionAxis = gpi_BusinessesacquiredMember |
Deferred Tax Liabilities, Gross |  | 28,738 us-gaap_DeferredIncomeTaxLiabilities / us-gaap_BusinessAcquisitionAxis = gpi_BusinessesacquiredMember |
Long-term Debt | 13,250 us-gaap_LongTermDebt / us-gaap_BusinessAcquisitionAxis = gpi_BusinessesacquiredMember | 68,639 us-gaap_LongTermDebt / us-gaap_BusinessAcquisitionAxis = gpi_BusinessesacquiredMember |
Liabilities | $ 50,795 us-gaap_Liabilities / us-gaap_BusinessAcquisitionAxis = gpi_BusinessesacquiredMember | $ 220,402 us-gaap_Liabilities / us-gaap_BusinessAcquisitionAxis = gpi_BusinessesacquiredMember |

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