Acquisitions (Details) (USD $)	3 Months Ended		6 Months Ended				4 Months Ended				6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012 Customer relationships [Member] Minimum [Member]	Jun. 30, 2012 Customer relationships [Member] Maximum [Member]	Jun. 30, 2012 IdeaOne Telecom [Member]	Mar. 01, 2012 IdeaOne Telecom [Member]	Dec. 31, 2011 IdeaOne Telecom [Member]	Mar. 01, 2012 IdeaOne Telecom [Member] Customer relationships [Member]	Jun. 30, 2012 IdeaOne Telecom [Member] Customer relationships [Member] Minimum [Member]	Jun. 30, 2012 IdeaOne Telecom [Member] Customer relationships [Member] Maximum [Member]	Jun. 30, 2012 IdeaOne Telecom [Member] Trade names [Member]	Mar. 01, 2012 IdeaOne Telecom [Member] Trade names [Member]
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Cash Paid								$ 6,180,000
Business Acquisition, Cost of Acquired Entity, Liabilities Incurred								22,000,000
Business Acquisition, Purchase Price Allocation, Property, Plant and Equipment, Total								23,077,000
Business Acquisition, Purchase Price Allocation, Current Assets, Receivables								310,000
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets										3,200,000				100,000
Business Acquisition, Purchase Price Allocation, Goodwill Amount								1,725,000
Business Acquisition, Purchase Price Allocation, Other Assets								273,000
Business Acquisition, Purchase Price Allocation, Liabilities Assumed								(505,000)
Business Acquisition, Cost of Acquired Entity, Purchase Price, Total								28,180,000
Finite-Lived Intangible Asset, Useful Life					1 year	8 years					4 years	7 years	2 years
Business Acquisition, Cost of Acquired Entity, Transaction Costs									510,000
Business Acquisition, Pro Forma Revenue			92,918,000	84,576,000
Business Acquisition, Pro Forma Net Income (Loss)			4,218,000	4,970,000
Business Acquisition, Pro Forma Earnings Per Share, Diluted			$ 0.31	$ 0.37
Revenue, Net	43,857,000	40,108,000	90,801,000	78,730,000			4,186,000
Net income	$ 1,809,000	$ 2,694,000	$ 4,131,000	$ 4,836,000			$ 279,000
Diluted earnings per share	$ 0.13	$ 0.20	$ 0.31	$ 0.36			$ 0.02