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		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Wireless [Member] | Sprint and affiliates [Member]
Revenue from External Customer [Line Items]
Customer concentrating on 10% or more of net revenue	65.20%	70.50%	64.90%	67.30%
Productivity & Graphics [Member] | FastSpring [Member]
Revenue from External Customer [Line Items]
Customer concentrating on 10% or more of net revenue	10.40%	12.80%	9.90%	12.70%