Commitments and Contingencies (Details) $ in Millions	1 Months Ended	3 Months Ended
	Aug. 31, 2015 USD ($)	Mar. 31, 2016 USD ($) item	Aug. 31, 2014 USD ($)
Jointly Owned Utility Plant Interests [Line Items]
CAF annual funding	$ 4.4
Period of support service		6 years
Number Of Eligible Locations To Offer Broadband | item		11,000
Revenue recognized from CAF first year funds		$ 1.1
Jointly owned utility plant
Jointly Owned Utility Plant Interests [Line Items]
Cost of construction			$ 235.0
Company investment in construction costs of plant			$ 25.0
Paid to the cable contractor for the cable build		$ 6.3
Period of up-front payment received		25 years
Proceeds from sale of capacity		$ 27.0
Up Front Payment Received		5.7
Escrow deposit		$ 3.5