SUBSEQUENT EVENTS (Details) - Subsequent event $ in Millions		1 Months Ended	3 Months Ended
	Aug. 07, 2018 USD ($)	Jul. 31, 2018 USD ($) item	Sep. 30, 2018 USD ($)
SUBSEQUENT EVENT
Amount of funding authorized for restoration and hardening following the Hurricanes	$ 7.3
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Asset Purchase Agreement | U.S. Telecom
SUBSEQUENT EVENT
Number of cell sites sold | item		100
Additional cash proceeds from transaction		$ 0.0
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Asset Purchase Agreement | U.S. Telecom | Forecast
SUBSEQUENT EVENT
Gain (Loss) on Disposition of Business			$ 15.0