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BASIS OF PRESENTATION - Reclassifications (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015
Prior period corrections |  |  |
Purchases of spectrum licenses and other intangible assets, including deposits |  | $ 10,860 |
Payment for purchase of securities |  | 2,000 |
Keytech |  |  |
Prior period corrections |  |  |
Other asset acquired |  | 3,200 |
Innovative |  |  |
Prior period corrections |  |  |
Other asset acquired |  | $ 4,300 |
Termination and Access Fees [Member] |  |  |
Prior period corrections |  |  |
Reclassification, decrease (increase) to expense | $ 1,100 |  | $ 3,100
Engineering and Operations Expenses [Member] |  |  |
Prior period corrections |  |  |
Reclassification, decrease (increase) to expense | 600 |  | 2,400
Equipment Expense [Member] |  |  |
Prior period corrections |  |  |
Reclassification, decrease (increase) to expense | 100 |  | 200
Selling and Marketing Expense [Member] |  |  |
Prior period corrections |  |  |
Reclassification, decrease (increase) to expense | (600) |  | (1,300)
General and administrative expense |  |  |
Prior period corrections |  |  |
Reclassification, decrease (increase) to expense | $ (300) |  | $ (800)

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