Long-Lived Assets (Details 2) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Subject to amortization
Gross Carrying Value	$ 22,029,000		$ 22,029,000		$ 18,060,000
Accumulated Amortization	8,277,000		8,277,000		6,285,000
Net Carrying Value	13,752,000		13,752,000		11,775,000
Not subject to amortization
Carrying Value - Brand name	27,300,000		27,300,000		27,300,000
Total intangible assets
Gross Carrying Value	49,329,000		49,329,000		45,360,000
Accumulated Amortization	8,277,000		8,277,000		6,285,000
Net Carrying Value	41,052,000		41,052,000		39,075,000
Goodwill recognized in conjunction with the acquisition	11,783,000		11,783,000		1,569,000
Amortization expense	700,000	700,000	2,000,000	2,100,000
Estimated amortization expense
2013 (remaining months)	828,000		828,000
2014	2,896,000		2,896,000
2015	2,498,000		2,498,000
2016	2,100,000		2,100,000
2017	1,703,000		1,703,000
Thereafter	3,727,000		3,727,000
Net Carrying Value	13,752,000		13,752,000		11,775,000
Wavecom
Total intangible assets
Goodwill recognized in conjunction with the acquisition	1,415,000		1,415,000
Intangible assets recognized in conjunction with the acquisition	650,000		650,000
SystemMetrics Corporation
Total intangible assets
Goodwill recognized in conjunction with the acquisition	10,368,000		10,368,000
Intangible assets recognized in conjunction with the acquisition	4,380,000		4,380,000
Wireline Services | Wavecom
Total intangible assets
Goodwill recognized in conjunction with the acquisition	1,400,000		1,400,000
Data center colocation services | SystemMetrics Corporation
Total intangible assets
Goodwill recognized in conjunction with the acquisition	10,400,000		10,400,000
Customer relationships
Subject to amortization
Gross Carrying Value	21,709,000		21,709,000		17,850,000
Accumulated Amortization	8,194,000		8,194,000		6,285,000
Net Carrying Value	13,515,000		13,515,000		11,565,000
Total intangible assets
Accumulated Amortization	8,194,000		8,194,000		6,285,000
Estimated useful life, intangible assets acquired			13 years
Estimated amortization expense
Net Carrying Value	13,515,000		13,515,000		11,565,000
Customer relationships | SystemMetrics Corporation
Total intangible assets
Intangible assets recognized in conjunction with the acquisition	3,600,000		3,600,000
Estimated useful life, intangible assets acquired			13 years
Trade name and other
Subject to amortization
Gross Carrying Value	320,000		320,000		210,000
Accumulated Amortization	83,000		83,000
Net Carrying Value	237,000		237,000		210,000
Total intangible assets
Accumulated Amortization	83,000		83,000
Estimated useful life, intangible assets acquired			4 years
Estimated amortization expense
Net Carrying Value	237,000		237,000		210,000
Trade name | SystemMetrics Corporation
Total intangible assets
Intangible assets recognized in conjunction with the acquisition	$ 100,000		$ 100,000
Estimated useful life, intangible assets acquired			4 years