ACQUISITIONS AND DISPOSITIONS - Purchase Price Allocation - US Telecom (Details) - USD ($) $ in Thousands	1 Months Ended
	Jul. 31, 2016	Jun. 30, 2017	Dec. 31, 2016
Purchase price allocation:
Goodwill		$ 62,873	$ 62,873
U.S. Telecom
Consideration Transferred
Cash consideration	$ 9,100
Purchase price allocation:
Property, plant and equipment	10,200
Deferred tax liabilities	3,500
Other long term liabilities	700
Goodwill	$ 3,100