Business Combinations - Additional Information (Detail) (USD $)	12 Months Ended		0 Months Ended	12 Months Ended				0 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2013	May 04, 2012 Nokia Siemens Networks [Member]	Dec. 31, 2013 Nokia Siemens Networks [Member]	Dec. 31, 2012 Nokia Siemens Networks [Member]	Dec. 31, 2013 Nokia Siemens Networks [Member] Customer Relationships [Member]	Dec. 31, 2013 Nokia Siemens Networks [Member] Developed Technology [Member]	Aug. 04, 2011 Bluesocket [Member]	Dec. 31, 2013 Bluesocket [Member]	Dec. 31, 2012 Bluesocket [Member]	Dec. 31, 2011 Bluesocket [Member]	Dec. 31, 2013 Bluesocket [Member] Customer Relationships [Member]	Dec. 31, 2013 Bluesocket [Member] Developed Technology [Member]	Dec. 31, 2013 Bluesocket [Member] Intellectual Property [Member]	Dec. 31, 2013 Bluesocket [Member] Trade Names [Member]
Business Acquisition [Line Items]
Purchase price, net of consideration			$ (7,496,000)					$ 23,688,000
Bargain purchase gain, net of tax	1,753,000		1,800,000
Average estimated useful life						13 years	5 years					7 years	4 years 6 months	7 years	4 years 6 months
Acquisition and integration related expenses and amortization of acquired intangibles				2,900,000	7,900,000
Acquisition cost								23,700,000
Goodwill	3,492,000	3,492,000						3,492,000	3,500,000
Acquisition and integration related expenses and amortization of acquired intangibles									$ 1,100,000	$ 1,500,000	$ 1,700,000