OPERATING SEGMENTS (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Revenues:
Data center services	$ 42,139	$ 34,114	$ 123,570	$ 98,137
IP services	25,990	27,900	80,274	83,691
Total revenues	68,129	62,014	203,844	181,828
Direct costs of network, sales and services, exclusive of depreciation and amortization:
Data center services	23,539	20,480	67,158	58,743
IP services	10,034	10,307	30,210	31,643
Total direct costs of network, sales and services, exclusive of depreciation and amortization	33,573	30,787	97,368	90,386
Segment profit:
Data center services	18,600	13,634	56,412	39,394
IP services	15,956	17,593	50,064	52,048
Total segment profit	34,556	31,227	106,476	91,442
Restructuring	124	123	812	1,615
Other operating expenses, including direct costs of customer support, depreciation and amortization	34,516	31,529	103,949	92,811
(Loss) income from operations	(84)	(425)	1,715	(2,984)
Non-operating expense	2,114	1,186	5,748	2,795
Loss before income taxes and equity in (earnings) of equity-method investment	$ (2,198)	$ (1,611)	$ (4,033)	$ (5,779)