This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.

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Derivative instrument obligations meeting the definition of a liability which the Company is a party to as of the balance sheet date.

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Fair Value Measurement (Details) (Recurring [Member], USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Assets:
Foreign exchange contracts	$ 26
Total assets	51,994	69,027
Liabilities:
Foreign exchange contracts	34	225
Total liabilities	34	225
Certificates of deposits [Member]
Assets:
Marketable securities	1,959	2,204
Foreign government bond [Member]
Assets:
Marketable securities	579	589
Corporate bonds [Member]
Assets:
Marketable securities	49,430	66,234
Level I [Member]
Assets:
Foreign exchange contracts
Total assets
Liabilities:
Foreign exchange contracts
Total liabilities
Level I [Member] \| Certificates of deposits [Member]
Assets:
Marketable securities
Level I [Member] \| Foreign government bond [Member]
Assets:
Marketable securities
Level I [Member] \| Corporate bonds [Member]
Assets:
Marketable securities
Level II [Member]
Assets:
Foreign exchange contracts	26
Total assets	51,994	69,027
Liabilities:
Foreign exchange contracts	34	225
Total liabilities	34	225
Level II [Member] \| Certificates of deposits [Member]
Assets:
Marketable securities	1,959	2,204
Level II [Member] \| Foreign government bond [Member]
Assets:
Marketable securities	579	589
Level II [Member] \| Corporate bonds [Member]
Assets:
Marketable securities	49,430	66,234
Level III [Member]
Assets:
Foreign exchange contracts
Total assets
Liabilities:
Foreign exchange contracts
Total liabilities
Level III [Member] \| Certificates of deposits [Member]
Assets:
Marketable securities
Level III [Member] \| Foreign government bond [Member]
Assets:
Marketable securities
Level III [Member] \| Corporate bonds [Member]
Assets:
Marketable securities