Fair Value Measurement (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Assets:
Foreign exchange contracts		$ 216
Liabilities:
Foreign exchange contracts	16	112
Corporate bonds
Assets:
Marketable securities	68,464	66,809
Certificates of deposits
Assets:
Marketable securities		1,959
Foreign government bonds
Assets:
Marketable securities		575
Level I
Assets:
Foreign exchange contracts
Liabilities:
Foreign exchange contracts
Level I | Corporate bonds
Assets:
Marketable securities
Level I | Certificates of deposits
Assets:
Marketable securities
Level I | Foreign government bonds
Assets:
Marketable securities
Level II
Assets:
Foreign exchange contracts		216
Liabilities:
Foreign exchange contracts	16	112
Level II | Corporate bonds
Assets:
Marketable securities	68,464	66,809
Level II | Certificates of deposits
Assets:
Marketable securities		1,959
Level II | Foreign government bonds
Assets:
Marketable securities		575
Level III
Assets:
Foreign exchange contracts
Liabilities:
Foreign exchange contracts
Level III | Corporate bonds
Assets:
Marketable securities
Level III | Certificates of deposits
Assets:
Marketable securities
Level III | Foreign government bonds
Assets:
Marketable securities