Segment Information - Accounts Receivable (Details)	3 Months Ended		9 Months Ended			12 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2012 Nokia Siemens Networks [Member]	Sep. 30, 2011 Nokia Siemens Networks [Member]	Sep. 30, 2012 Nokia Siemens Networks [Member]	Sep. 30, 2011 Nokia Siemens Networks [Member]	Sep. 30, 2012 Nokia Siemens Networks [Member] Accounts Receivable [Member]	Dec. 31, 2011 Nokia Siemens Networks [Member] Accounts Receivable [Member]	Sep. 30, 2012 NEC [Member]	Sep. 30, 2012 NEC [Member]
Concentration Risk [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	23.10%	40.20%	23.70%	29.10%			11.60%	11.20%
Concentration Risk, Percentage					27.00%	23.40%