Segment and Geographic Area Information Property and Equipment by Geographic Area (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Property and equipment, net	$ 3,440,744	$ 3,396,295
Percent of total property and equipment	100.00%	100.00%
United States [Member]
Segment Reporting Information [Line Items]
Property and equipment, net	2,602,640	2,487,782
Percent of total property and equipment	75.70%	73.20%
Australian Operations [Member]
Segment Reporting Information [Line Items]
Property and equipment, net	557,292	629,602
Percent of total property and equipment	16.20%	18.50%
Canada [Member]
Segment Reporting Information [Line Items]
Property and equipment, net	265,933	263,828
Percent of total property and equipment	7.70%	7.80%
Europe [Member]
Segment Reporting Information [Line Items]
Property and equipment, net	14,879	15,083
Percent of total property and equipment	0.40%	0.50%
Total Non-United States
Segment Reporting Information [Line Items]
Property and equipment, net	$ 838,104	$ 908,513
Percent of total property and equipment	24.30%	26.80%