Goodwill and Other Intangible Assets (Details) (USD $)	6 Months Ended			3 Months Ended			6 Months Ended				6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012	Mar. 31, 2013 Customer relationships [Member]	Jun. 30, 2013 Customer relationships [Member]	Dec. 31, 2012 Customer relationships [Member]	Jun. 30, 2013 Customer relationships [Member] Minimum [Member]	Jun. 30, 2013 Customer relationships [Member] Maximum [Member]	Jun. 30, 2013 Other intangibles [Member]	Dec. 31, 2012 Other intangibles [Member]	Jun. 30, 2013 Other intangibles [Member] Minimum [Member]	Jun. 30, 2013 Other intangibles [Member] Maximum [Member]	Jun. 30, 2013 Fiber and Data Segment [Member]	Dec. 31, 2012 Fiber and Data Segment [Member]	Jun. 30, 2013 Equipment Segment [Member]	Dec. 31, 2012 Equipment Segment [Member]	Jun. 30, 2013 Telecom [Member]	Dec. 31, 2012 Telecom [Member]
Goodwill and Other Intangible Assets [Abstract]
Number of business segments	3
Goodwill [Line Items]
Goodwill	$ 29,028,000		$ 29,028,000										$ 5,384,000	$ 5,384,000	$ 596,000	$ 596,000	$ 23,048,000	$ 23,048,000
Goodwill tax deductible amount	26,964,000
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	11,389,000		11,429,000		8,459,000	8,499,000			2,930,000	2,930,000
Accumulated Amortization	7,061,000		6,618,000		5,716,000	5,368,000			1,345,000	1,250,000
Finite-Lived Intangible Asset, Useful Life							1 year	8 years			1 year	5 years
Amortization of intangibles	443,000	357,000
Asset Impairment Charges				40,000
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
Future amortization expense for remainder of fiscal year	440,000
2014	749,000
2015	616,000
2016	565,000
2017	554,000
2018	$ 554,000