Goodwill and Other Intangible Assets (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Goodwill [Line Items]
Goodwill	$ 29,028,000		$ 29,028,000
Goodwill tax deductible amount	26,964,000
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	11,589,000		11,589,000
Accumulated Amortization	7,724,000		7,501,000
Amortization of intangibles	223,000	223,000
Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	8,459,000		8,459,000
Accumulated Amortization	6,233,000		6,061,000
Customer relationships [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	1 year
Customer relationships [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	8 years
Other intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	3,130,000		3,130,000
Accumulated Amortization	1,491,000		1,440,000
Other intangibles [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	1 year
Other intangibles [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	5 years
Fiber and Data Segment [Member]
Goodwill [Line Items]
Goodwill	5,384,000		5,384,000
Equipment Segment [Member]
Goodwill [Line Items]
Goodwill	596,000		596,000
Telecom [Member]
Goodwill [Line Items]
Goodwill	$ 23,048,000		$ 23,048,000