Goodwill and Other Intangible Assets (Details) (USD $)	3 Months Ended		9 Months Ended			3 Months Ended			9 Months Ended				9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Mar. 31, 2013 Customer relationships [Member]	Sep. 30, 2013 Customer relationships [Member]	Dec. 31, 2012 Customer relationships [Member]	Sep. 30, 2013 Customer relationships [Member] Minimum [Member]	Sep. 30, 2013 Customer relationships [Member] Maximum [Member]	Sep. 30, 2013 Other intangibles [Member]	Dec. 31, 2012 Other intangibles [Member]	Sep. 30, 2013 Other intangibles [Member] Minimum [Member]	Sep. 30, 2013 Other intangibles [Member] Maximum [Member]	Sep. 30, 2013 Fiber and Data Segment [Member]	Dec. 31, 2012 Fiber and Data Segment [Member]	Sep. 30, 2013 Equipment Segment [Member]	Dec. 31, 2012 Equipment Segment [Member]	Sep. 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		$ 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		26,964,000
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	11,389,000		11,389,000		11,429,000		8,459,000	8,499,000			2,930,000	2,930,000
Accumulated Amortization	7,281,000		7,281,000		6,618,000		5,888,000	5,368,000			1,393,000	1,250,000
Finite-Lived Intangible Asset, Useful Life									1 year	8 years			1 year	5 years
Amortization of intangibles	220,000	223,000	663,000	580,000
Asset Impairment Charges						40,000
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
Future amortization expense for remainder of fiscal year	220,000		220,000
2014	749,000		749,000
2015	616,000		616,000
2016	565,000		565,000
2017	554,000		554,000
2018	554,000		554,000
Thereafter	$ 850,000		$ 850,000