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LEGAL PROCEEDINGS (Details) (USD $) In Thousands, unless otherwise specified | 0 Months Ended | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Sep. 24, 2013 Potential violation of federal environmental laws item | Mar. 30, 2011 Putative shareholder derivative lawsuits item | Mar. 31, 2014 Putative shareholder derivative lawsuits | Dec. 31, 2013 Putative shareholder derivative lawsuits
LEGAL PROCEEDINGS |  |  |  |
Number of lawsuits |  | 3 |  |
Number of lawsuits alleging violation of Section 14(a) of the Exchange Act in connection with proxy statement |  | 1 |  |
Number of federal derivative lawsuits consolidated |  | 2 |  |
Settlement amount | $ 1,500 |  | $ 600 |
Settlement amount payable |  |  |  | 495
Number of installments over which fine is payable | 3 |  |  |
Fine payable under each installment | $ 500 |  |  |
Period over which fine is payable | 3 years |  |  |

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