Acquisitions and Dispositions (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Allocation of purchase price [Line Items]
Inventory, Net	$ 1,547,436us-gaap_InventoryNet	$ 1,556,705us-gaap_InventoryNet
Assets, Current	1,982,489us-gaap_AssetsCurrent	2,035,219us-gaap_AssetsCurrent
Property, Plant and Equipment, Net	944,485us-gaap_PropertyPlantAndEquipmentNet	950,388us-gaap_PropertyPlantAndEquipmentNet
Total assets	4,098,467us-gaap_Assets	4,141,492us-gaap_Assets
Liabilities, Current	1,817,106us-gaap_LiabilitiesCurrent	1,922,199us-gaap_LiabilitiesCurrent
Businesses acquired [Member]
Allocation of purchase price [Line Items]
Inventory, Net		131,878
Assets, Current		6,601
Property, Plant and Equipment, Net		82,147
Intangible Assets, Net (Including Goodwill)		183,449
Deferred Tax Assets, Gross		7,265
Total assets		411,340
Liabilities, Current		37,545
Long-term Debt		13,250
Liabilities		$ 50,795

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Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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