Fair Value of Outstanding Derivative Instruments (Detail) (Fair Value of Derivative Instruments, USD $) In Thousands, unless otherwise specified	Mar. 31, 2013		Dec. 31, 2012
Derivatives, Fair Value [Line Items]
Total	$ 518		$ 484
Foreign exchange forward contracts and put options contracts | Other accounts receivable and prepaid expenses
Derivatives, Fair Value [Line Items]
Total	$ 518	[1]	$ 484	[1]

[1] Estimated to be reclassified into earnings during 2013.