Fair Value Measurement (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Assets:
Marketable securities	$ 50,262	$ 47,833
Foreign exchange contracts	219
Liabilities:
Foreign exchange contracts	7	64
Contingent Consideration		3,603
Certificates of deposits
Assets:
Marketable securities	1	1,975
Corporate bonds
Assets:
Marketable securities	50,261	45,858
Level II
Assets:
Foreign exchange contracts	219
Liabilities:
Foreign exchange contracts	7	64
Level II | Certificates of deposits
Assets:
Marketable securities	1	1,975
Level II | Corporate bonds
Assets:
Marketable securities	$ 50,261	45,858
Level 3
Liabilities:
Contingent Consideration		$ 3,603