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Gain on Sale of Patent Assets	9 Months Ended
	Sep. 30, 2013
Gain On Sale Of Patent Assets [Abstract]
Gain on Sale of Patent Assets	G) Gain on Sale of Patent Assets.  We recorded a $15.2 million gain on the sale of patent assets in the three months ended September 30, 2012. This gain relates to a transaction we completed in September 2012 in which we sold a portion of our patent portfolio pertaining to digital subscriber line (“DSL”) technology for $16.0 million. The proceeds from the sale were reduced by $0.8 million of transaction costs. We recorded an $86.4 million gain on the sale of patent assets in the nine months ended September 30, 2012. This gain includes the $15.2 million gain described in the previous paragraph and a $71.2 million gain on the sale of patent assets that occurred in the second quarter of 2012.  In June 2012, we completed a transaction to sell patents pertaining to wireless technology for $75 million. The proceeds from that sale were reduced by $3.8 million of transaction costs.

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