Property and Equipment Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 3,500,493	$ 3,699,224
Less accumulated depreciation and leasehold amortization	1,933,623	1,895,141
Total property and equipment, net	1,656,171	1,804,083
Computer and communications equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,981,488	1,939,517
Land, buildings and improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,180,042	1,403,835
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	202,283	208,496
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	116,236	146,351
Other equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 20,444	$ 1,025