Segment Reporting (Details 2) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 1,672,743	$ 1,669,066	$ 1,662,931	$ 1,567,153	$ 1,656,316	$ 1,687,150	$ 1,684,571	$ 1,610,737	$ 6,571,893	$ 6,638,774	$ 6,419,285
Long-lived assets:	8,899,705				7,901,480				8,899,705	7,901,480	7,226,652
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									5,603,697	5,614,037	5,411,376
Long-lived assets:	7,817,628				6,790,946				7,817,628	6,790,946	6,098,635
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									408,325	435,280	455,440
Long-lived assets:	504,027				530,316				504,027	530,316	529,880
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									391,339	400,853	372,209
Long-lived assets:	545,630				553,467				545,630	553,467	568,850
Mexico
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									139,583	158,481	161,279
Long-lived assets:	31,993				26,230				31,993	26,230	29,008
Asia
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									28,949	30,123	18,981
Long-lived assets:	427				521				427	521	279
Foreign
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									968,196	1,024,737	1,007,909
Long-lived assets:	$ 1,082,077				$ 1,110,534				$ 1,082,077	$ 1,110,534	$ 1,128,017