Segment Information Balance Sheet Data (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Segment Reporting, Asset Reconciling Item [Line Items]
Cash and cash equivalents	$ 121,390	$ 80,472	$ 38,265	$ 32,319
Property and equipment, net	4,640,824	4,656,921
North American Operations [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Cash and cash equivalents	28,845	13,584
Property and equipment, net	3,641,579	3,657,801
Australian Operations [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Cash and cash equivalents	68,155	52,407
Property and equipment, net	650,934	664,367
U.K./European Operations [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Cash and cash equivalents	24,390	14,481
Property and equipment, net	$ 348,311	$ 334,753