Acquisitions and Dispositions Acquisitions and Dispositions (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Allocation of purchase price [Line Items]
Assets, Current	$ 2,202,955	$ 2,035,219
Inventory, Net	1,737,751	1,556,705
Property, Plant and Equipment, Net	1,033,981	950,388
Deferred Tax Assets, Gross	110,860	99,265
Total assets	4,414,929	4,141,492
Liabilities, Current	2,039,470	1,922,199
Deferred Tax Liabilities, Gross	$ 199,723	186,044
Businesses acquired [Member]
Allocation of purchase price [Line Items]
Assets, Current			$ 26,884
Inventory, Net		132,180	164,655
Other Assets, Current		6,601
Property, Plant and Equipment, Net		78,562	72,328
Goodwill and intangible franchise rights		185,307	305,876
Other Assets			864
Deferred Tax Assets, Gross		7,063
Total assets		409,713	570,607
Liabilities, Current		59,912	123,025
Deferred Tax Liabilities, Gross			28,738
Long-term Debt		13,250	68,639
Liabilities		$ 73,162	$ 220,402