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Business Combination - Schedule of Assets Acquired at Fair Value (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Business Acquisition [Line Items]      
Goodwill $ 138,759 $ 147,312 $ 146,000
ALLO Communications [Member]      
Business Acquisition [Line Items]      
Cash and cash equivalents     334
Restricted cash     850
Accounts receivable     1,935
Property and equipment     32,479
Other assets     371
Intangible assets     11,410
Goodwill     21,112
Other liabilities     (4,587)
Bonds and notes payable     (13,904)
Net assets acquired     50,000
Minority interest     (3,750)
Total consideration paid by the Company     $ 46,250