Segment Information Balance Sheet Data (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016	Dec. 31, 2015
Segment Reporting, Asset Reconciling Item [Line Items]
Cash and cash equivalents	$ 83,743	$ 32,319	$ 24,971	$ 35,941
Property and equipment, net	4,590,740	4,503,319
North American Operations [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Cash and cash equivalents	11,266	10,137
Property and equipment, net	3,607,366	3,590,625
Australian Operations [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Cash and cash equivalents	47,602	9,213
Property and equipment, net	660,454	634,148
U.K./European Operations [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Cash and cash equivalents	24,875	12,969
Property and equipment, net	$ 322,920	$ 278,546