Segment Reporting - Assets by Segment (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 1,484,407	$ 627,151
Operating Segments [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	2,495,367	983,609
Operating Segments [Member] | Wireless [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	1,101,716	205,718
Operating Segments [Member] | Cable [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	218,471	209,132
Operating Segments [Member] | Wireline [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	115,282	105,369
Other [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	1,059,898	463,390
Eliminations [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ (1,010,960)	$ (356,458)