Segment Information Balance Sheet Data (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Segment Reporting, Asset Reconciling Item [Line Items]
Cash and cash equivalents	$ 82,383	$ 90,387	$ 69,702	$ 80,472
Property and equipment, net	4,669,704	4,613,014
North American Operations [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Cash and cash equivalents	23,624	33,996
Property and equipment, net	3,727,668	3,679,279
Australia Operations [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Cash and cash equivalents	41,325	26,902
Property and equipment, net	601,130	609,450
U.K./European Operations [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Cash and cash equivalents	17,434	29,489
Property and equipment, net	$ 340,906	$ 324,285