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FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS (Assets and Liabilities) (Details) - USD ($) $ in Thousands | Sep. 30, 2016 | Dec. 31, 2015
--- | --- | ---
Accrued and other long term liabilities | LDS |  |
Assets and liabilities measured at fair value on a recurring basis |  |
Contingent consideration | $ 6,800 |
Interest rate swap agreement | Other long-term liabilities |  |
Assets and liabilities measured at fair value on a recurring basis |  |
Interest rate swap | 1,600 | $ 900
Recurring basis |  |
Assets and liabilities measured at fair value on a recurring basis |  |
Assets | 9,875 | 27,031
Liabilities | 8,380 |
Recurring basis | Accrued and other long term liabilities |  |
Assets and liabilities measured at fair value on a recurring basis |  |
Contingent consideration | 6,775 |
Recurring basis | Interest rate swap agreement | Other long-term liabilities |  |
Assets and liabilities measured at fair value on a recurring basis |  |
Interest rate swap | 1,605 | 897
Recurring basis | Money market funds | Cash and cash equivalents |  |
Assets and liabilities measured at fair value on a recurring basis |  |
Assets | 7,803 | 24,904
Recurring basis | Voluntary Savings Plan - mutual funds held in trust | Other long-term assets |  |
Assets and liabilities measured at fair value on a recurring basis |  |
Assets | 2,072 | 2,127
Recurring basis | Level 1 |  |
Assets and liabilities measured at fair value on a recurring basis |  |
Assets | 9,875 | 27,031
Recurring basis | Level 1 | Money market funds | Cash and cash equivalents |  |
Assets and liabilities measured at fair value on a recurring basis |  |
Assets | 7,803 | 24,904
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 | 2,072 | 2,127
Recurring basis | Level 2 |  |
Assets and liabilities measured at fair value on a recurring basis |  |
Liabilities | 1,605 |
Recurring basis | Level 2 | Interest rate swap agreement | Other long-term liabilities |  |
Assets and liabilities measured at fair value on a recurring basis |  |
Interest rate swap | 1,605 | $ 897
Recurring basis | Level 3 |  |
Assets and liabilities measured at fair value on a recurring basis |  |
Liabilities | $ 6,775 |
Recurring basis | Level 3 | LDS |  |
Assets and liabilities measured at fair value on a recurring basis |  |
Discount rate (as a percent) | 11.50% |
Recurring basis | Level 3 | Accrued and other long term liabilities |  |
Assets and liabilities measured at fair value on a recurring basis |  |
Contingent consideration | $ 6,775 |

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