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FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS (Details 3) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Interest rate swap agreement | Other long-term liabilities
Assets and liabilities measured at fair value on a recurring basis
Liabilities	$ 800	$ 600
Recurring basis | Level 1
Assets and liabilities measured at fair value on a recurring basis
Assets	40,694	44,069
Recurring basis | Level 1 | Money market funds | Cash and cash equivalents
Assets and liabilities measured at fair value on a recurring basis
Assets	38,603	41,101
Recurring basis | Level 1 | Voluntary Savings Plan - mutual funds held in trust | Other long-term assets
Assets and liabilities measured at fair value on a recurring basis
Assets	2,091	2,968
Recurring basis | Level 2 | Interest rate swap agreement | Other long-term liabilities
Assets and liabilities measured at fair value on a recurring basis
Liabilities	$ 773	$ 576

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Reference 1: http://www.xbrl.org/2003/role/presentationRef



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-Name Accounting Standards Codification



-Topic 820



-SubTopic 10



-Section 50



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Reference 1: http://www.xbrl.org/2003/role/presentationRef



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-Topic 815



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