Property and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Property and equipment
Total property and equipment	$ 1,543,255	$ 1,404,968
Accumulated depreciation	(630,664)	(512,751)
Property and equipment, net	912,591	892,217
Depreciation expense	142,600	129,000	$ 96,100
Land
Property and equipment
Total property and equipment	77,077	76,987
Leasehold improvements
Property and equipment
Total property and equipment	420,632	309,504
Buildings
Property and equipment
Total property and equipment	414,704	421,017
Furniture and equipment
Property and equipment
Total property and equipment	517,912	432,944
Construction-in-progress
Property and equipment
Total property and equipment	$ 112,930	$ 164,516