Property and Equipment - Property and Equipment, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	$ 1,437,620
Total property and equipment, gross			$ 1,263,448
Less: accumulated depreciation	(692,540)
Less: accumulated depreciation			(451,443)
Total property and equipment, net	745,080
Total property and equipment, net		$ 758,085	812,005
Buildings
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	648,003
Total property and equipment, gross			657,438
Furniture and equipment
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	317,567
Total property and equipment, gross			280,908
Software
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	167,547
Total property and equipment, gross			162,601
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	241,178
Total property and equipment, gross			103,428
Computers
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	$ 63,325
Total property and equipment, gross			$ 59,073