OPERATING SEGMENTS - Summary of operating results for business segments - (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Segment profit:
Exit activities, restructuring and impairments	$ 201	$ 265
Loss from operations	(2,201)	(4,119)
Non-operating expense	(7,341)	(6,335)
Loss before income taxes and equity in (earnings) of equity-method investment	(9,542)	(10,454)
Operating segments
Revenues:
Total revenues	75,924	80,786
Direct costs of sales and services, exclusive of depreciation and amortization:
Total direct costs of sales and services, exclusive of depreciation and amortization	31,077	33,346
Segment profit:
Total segment profit	44,847	47,440
Operating segments | Data center and network services
Revenues:
Total revenues	50,872	54,068
Direct costs of sales and services, exclusive of depreciation and amortization:
Total direct costs of sales and services, exclusive of depreciation and amortization	24,373	26,481
Segment profit:
Total segment profit	26,499	27,587
Operating segments | Cloud And Hosting Services
Revenues:
Total revenues	25,052	26,718
Direct costs of sales and services, exclusive of depreciation and amortization:
Total direct costs of sales and services, exclusive of depreciation and amortization	6,704	6,865
Segment profit:
Total segment profit	18,348	19,853
Segment reconciling items
Segment profit:
Exit activities, restructuring and impairments	201	265
Other operating expenses, including direct costs of customer support, depreciation and amortization	46,847	51,294
Loss from operations	(2,201)	(4,119)
Non-operating expense	7,341	6,335
Loss before income taxes and equity in (earnings) of equity-method investment	$ (9,542)	$ (10,454)