Segment Information Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues	$ 542,219	$ 414,563	$ 939,249	$ 790,842
Percent of operating revenue by geographic area	100.00%	100.00%	100.00%	100.00%
Property and equipment, net	$ 4,104,092		$ 4,104,092		$ 3,788,482
Percent of property and equipment by geographic area	100.00%		100.00%		100.00%
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues	$ 285,688	$ 296,026	$ 576,107	$ 563,798
Percent of operating revenue by geographic area	52.70%	71.40%	61.30%	71.30%
Property and equipment, net	$ 3,102,630		$ 3,102,630		$ 3,003,299
Percent of property and equipment by geographic area	75.60%		75.60%		79.30%
Australia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues	$ 66,808	$ 83,119	$ 126,750	$ 159,411
Percent of operating revenue by geographic area	12.30%	20.00%	13.50%	20.20%
Property and equipment, net	$ 485,246		$ 485,246		$ 506,154
Percent of property and equipment by geographic area	11.80%		11.80%		13.40%
Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues	$ 25,292	$ 29,716	$ 52,497	$ 57,586
Percent of operating revenue by geographic area	4.70%	7.20%	5.60%	7.30%
Property and equipment, net	$ 249,665		$ 249,665		$ 266,305
Percent of property and equipment by geographic area	6.10%		6.10%		7.00%
U.K./Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues	$ 164,431	$ 5,702	$ 183,895	$ 10,047
Percent of operating revenue by geographic area	30.30%	1.40%	19.60%	1.20%
Property and equipment, net	$ 266,551		$ 266,551		$ 12,724
Percent of property and equipment by geographic area	6.50%		6.50%		0.30%
Total Non-United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues	$ 256,531	$ 118,537	$ 363,142	$ 227,044
Percent of operating revenue by geographic area	47.30%	28.60%	38.70%	28.70%
Property and equipment, net	$ 1,001,462		$ 1,001,462		$ 785,183
Percent of property and equipment by geographic area	24.40%		24.40%		20.70%