Reportable Segments - Summarized Financial Information Based Geographic Location (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net revenue
Net revenue	$ 66,482	$ 59,090	$ 195,300	$ 176,358
Total net revenue	66,482	59,090	195,300	176,358
Direct profit contribution
Direct profit contribution	33,644	28,540	97,841	86,537
Adjustments:
Stock-based compensation	(802)	(763)	(2,222)	(2,050)
Other, net	(6,090)	(3,231)	(17,167)	(9,131)
Gross profit	26,752	24,546	78,452	75,356
NALA
Net revenue
Net revenue	45,068	37,647	125,357	110,720
Total net revenue	45,068	37,647	125,357	110,720
Direct profit contribution
Direct profit contribution	23,612	20,928	67,222	60,101
EMEA
Net revenue
Net revenue	15,625	14,159	51,383	45,425
Total net revenue	15,625	14,159	51,383	45,425
Direct profit contribution
Direct profit contribution	7,813	6,739	25,692	23,809
APJ
Net revenue
Net revenue	5,789	7,284	18,560	20,213
Total net revenue	5,789	7,284	18,560	20,213
Direct profit contribution
Direct profit contribution	$ 2,219	$ 873	$ 4,927	$ 2,627