Goodwill and Other Intangible Assets (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Goodwill [Line Items]
Number of business segments	3
Goodwill	$ 29,028,000	$ 27,303,000
Goodwill tax deductible amount	26,964,000
Goodwill allocation	1,725,000
Finite-Lived Intangible Assets [Line Items]
Useful Lives	3 years
Gross Carrying Amount	11,429,000	8,129,000
Accumulated Amortization	6,618,000	5,815,000
Amortization of intangibles	803,000	354,000	357,000
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
2013	893,000
2014	762,000
2015	629,000
2016	567,000
2017	554,000
Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	8,499,000	5,299,000
Accumulated Amortization	5,368,000	4,746,000
Customer relationships [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Lives	8 years
Customer relationships [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Lives	1 year
Other intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,930,000	2,830,000
Accumulated Amortization	1,250,000	1,069,000
Other intangibles [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Lives	5 years
Other intangibles [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Lives	1 year
Fiber and Data Segment [Member]
Goodwill [Line Items]
Goodwill	5,384,000	3,659,000
Equipment Segment [Member]
Goodwill [Line Items]
Goodwill	596,000	596,000
Telecom [Member]
Goodwill [Line Items]
Goodwill	$ 23,048,000	$ 23,048,000