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Segment, Customer Concentration and Geographical Information - Company's Customers that Represent 10% or More of Company's Net Revenues (Detail) (Revenues [Member], Customer Concentration Risk [Member]) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013
Wireless [Member] | Sprint and affiliates [Member] |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Customer concentrating on 10% or more of net revenue | 67.10% | 61.50% | 67.30% | 55.60%
Wireless [Member] | Verizon Wireless and affiliates [Member] |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Customer concentrating on 10% or more of net revenue | 8.20% | 9.80% | 7.40% | 14.90%
Productivity & Graphics [Member] | FastSpring [Member] |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Customer concentrating on 10% or more of net revenue | 10.00% | 13.60% | 11.80% | 11.90%

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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13537-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13531-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 + Details
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