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Summary of Significant Accounting Policies (Changes in Allowance for Doubtful Accounts) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Concentration Risk [Line Items]
Balance at beginning of period	$ 1,732	$ 1,662	$ 3,342
Charged to expense	580	116	210
Deductions	(167)	(72)	(1,863)
Effect of foreign currency exchange rates	37	26	(27)
Balance at end of period	$ 2,182	$ 1,732	$ 1,662
Fastweb S.p.A. [Member] \| Network Integration segment [Member] \| Accounts Receivable [Member]
Concentration Risk [Line Items]
Percentage of Accounts Receivable (excceds percentage)	22.00%	21.00%
Telecom Italia S.p.A. [Member] \| Network Integration segment [Member] \| Accounts Receivable [Member]
Concentration Risk [Line Items]
Percentage of Accounts Receivable (excceds percentage)	27.00%	9.00%

Amount of the current period expense charged against operations, the offset which is generally to the allowance for doubtful accounts for the purpose of reducing receivables, including notes receivable, to an amount that approximates their net realizable value (the amount expected to be collected).

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