Segment Reporting - Geographic Information (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets:	$ 10,341,783	$ 9,131,966	$ 8,893,592
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets:	9,114,595	7,935,167	7,854,845
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets:	648,856	623,576	532,403
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets:	522,633	527,869	472,027
Mexico
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets:	55,462	44,997	33,979
Singapore
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets:	237	357	338
Foreign
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets:	$ 1,227,188	$ 1,196,799	$ 1,038,747