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FAIR VALUE MEASUREMENTS: (Details 4) (USD $) In Thousands, unless otherwise specified | 12 Months Ended |  |  | 3 Months Ended |
--- | --- | --- | --- | --- | ---
Dec. 31, 2012 | Dec. 31, 2012 Fair value measured on a nonrecurring basis Fair Value Basis | Dec. 31, 2011 Fair value measured on a nonrecurring basis Fair Value Basis | Dec. 31, 2012 Fair value measured on a nonrecurring basis Level 3 | Dec. 31, 2011 Fair value measured on a nonrecurring basis Level 3
Assets measured at fair value on a nonrecurring basis |  |  |  |  |
Equity method investment |  | $ 2,127 | $ 3,935 | $ 2,127 | $ 3,935
Equity method investment, Impairment Charges | $ 850 |  |  | $ 850 |

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