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FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS (Details 3) (Recurring basis, Level 1, USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
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Financial Assets Measured at Fair Value |  |
Financial Assets at Fair Value | $ 15,164 | $ 15,637
Money market funds |  |
Financial Assets Measured at Fair Value |  |
Financial Assets at Fair Value | 12,101 | 12,602
Voluntary Savings Plan - mutual funds held in trust |  |
Financial Assets Measured at Fair Value |  |
Financial Assets at Fair Value | $ 3,063 | $ 3,035

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
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