Acquisitions - Schedule of Acquisition Related Costs (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Business Acquisition [Line Items]
Integration and acquisition expenses	$ 3,678	$ 20,054	$ 8,167	$ 20,386
Ntelos Holding, Corp
Business Acquisition [Line Items]
Integration and acquisition expenses	5,400	22,400	12,500	22,700
Ntelos Holding, Corp | Cost of goods and services
Business Acquisition [Line Items]
Integration and acquisition expenses	400	300	1,200	300
Ntelos Holding, Corp | Selling, general and administrative
Business Acquisition [Line Items]
Integration and acquisition expenses	1,300	2,000	3,100	2,000
Ntelos Holding, Corp | Integration and acquisition
Business Acquisition [Line Items]
Integration and acquisition expenses	$ 3,700	$ 20,100	$ 8,200	$ 20,400