Property and Equipment, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Accumulated amortization for capitalized leased assets	$ 9,900	$ 8,300
Property and equipment, gross	1,760,595	1,486,965
Less: accumulated depreciation and amortization	(457,825)	(353,393)
Property and equipment, net	1,302,770	1,133,572
Depreciation and amortization of property and equipment	106,666	89,124	$ 66,591
Capitalized interest	4,900	2,900	$ 2,700
Land and land improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	194,711	151,286
Buildings, Building Improvements And Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	412,089	338,763
Data center equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	904,722	763,790
Vehicles
Property, Plant and Equipment [Line Items]
Property and equipment, gross	33,730	35,974
Substation equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	4,247	4,247
Cloud computing equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	5,192	5,661
Fiber facilities
Property, Plant and Equipment [Line Items]
Property and equipment, gross	9,912	8,459
Computer equipment, furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	34,975	30,745
Capitalized leased assets
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,685	1,573
Core Network Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	34,901	31,472
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment, gross	124,431	110,559
Deferred installation charges
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 0	$ 4,436