Segment Information (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenues and adjusted segment income by reportable segment
Total revenues	$ 3,824,143	$ 3,336,020	$ 10,927,917	$ 9,814,784
Segment income	97,966	57,268	283,198	211,912
Operating segments
Revenues and adjusted segment income by reportable segment
Total revenues	3,824,143	3,336,020	10,927,917	9,814,784
Segment income	65,275	41,031	184,981	136,941
Operating segments | Retail
Revenues and adjusted segment income by reportable segment
Total revenues	3,763,840	3,336,020	10,867,035	9,814,784
Segment income	51,732	33,119	162,074	117,994
Operating segments | Other
Revenues and adjusted segment income by reportable segment
Total revenues	66,050		88,026
Segment income	13,485	7,912	23,178	18,947
Intersegment Elimination
Revenues and adjusted segment income by reportable segment
Total revenues	(5,747)		(27,144)
Segment income	$ 58		$ (271)