BASIS OF PRESENTATION - Reclassifications (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2016
Termination and access fees
Reclassification, decrease (increase) to expense	$ 2.4	$ 2.8
Engineering and operations expenses
Reclassification, decrease (increase) to expense	(3.1)	(4.4)
Selling and marketing expense.
Reclassification, decrease (increase) to expense	0.6	0.6
Equipment expense
Reclassification, decrease (increase) to expense	(0.3)	(0.4)
General and administrative expense
Reclassification, decrease (increase) to expense	$ 0.4	$ 1.4