ACQUISITION - Schedule of Fair Value of Acquired Assets (Details) - USD ($) $ in Thousands	Feb. 28, 2018	Mar. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
Intangible assets:
Goodwill		$ 118,077	$ 50,209	$ 50,209
SingleHop, LLC
Business Acquisition [Line Items]
Cash	$ 2,857,000
Prepaid expenses and other assets	1,683,000
Property, plant and equipment	14,885,000
Other long term assets	39,000
Intangible assets:
Goodwill	67,868,000
Total assets acquired	142,232,000
Accounts payable and accrued liabilities	5,098,000
Deferred revenue	1,600,000
Long term liabilities	534,000
Net assets acquired	135,000,000
SingleHop, LLC | Noncompete Agreements
Intangible assets:
Finite lived intangible assets	$ 4,000,000
Weighted Average	4 years
SingleHop, LLC | Trade name
Intangible assets:
Finite lived intangible assets	$ 1,700,000
Weighted Average	8 years
SingleHop, LLC | Technology
Intangible assets:
Finite lived intangible assets	$ 15,100,000
Weighted Average	7 years
SingleHop, LLC | Customer relationship
Intangible assets:
Finite lived intangible assets	$ 34,100,000
Weighted Average	10 years