Property and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Right-of-use finance lease assets	$ 1,613	$ 1,613
Property and equipment, gross	4,967,403	4,942,199
Accumulated depreciation	(1,863,067)	(1,824,952)
Property and equipment, net	3,104,336	3,117,247
Land and land improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	377,593	351,618
Buildings [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	3,574,067	3,462,218
Furniture and Fixtures and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	942,051	960,666
Construction in progress [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 72,079	$ 166,084