Details about Accumulated Other Comprehensive Income (Loss) Components (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of revenues	$ (5,163)	$ (3,952)	$ (3,559)
Financial income, net	2,714	3,380	2,909
Research and development	(21,216)	(20,243)	(21,543)
Sales and marketing	(10,092)	(9,231)	(8,937)
General and administrative	(7,670)	(7,884)	(7,639)
Income before taxes on income	7,473	15,747	21,470
Provision for income taxes	(788)	(2,062)	(2,908)
Net income	6,685	13,685	18,562
Reclassification out of accumulated other comprehensive income (loss)
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income	732
Reclassification out of accumulated other comprehensive income (loss) | Unrealized gains (losses) on cash flow hedges
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of revenues	13
Research and development	432
Sales and marketing	27
General and administrative	43
Income before taxes on income	515
Provision for income taxes	(54)
Net income	461
Reclassification out of accumulated other comprehensive income (loss) | Unrealized gains (losses) on available-for-sale marketable securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Financial income, net	379
Provision for income taxes	(108)
Net income	$ 271