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LEGAL PROCEEDINGS (Details) (USD $) In Thousands, unless otherwise specified |  |  | 1 Months Ended | 6 Months Ended |  | 1 Months Ended |  | 1 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2013 | Sep. 30, 2012 | Feb. 28, 2011 Potential violation of federal environmental laws item | Jun. 30, 2013 Potential violation of federal environmental laws | Dec. 31, 2010 Potential violation of federal environmental laws | Feb. 28, 2011 Putative class action item | Aug. 20, 2012 Putative class action | Mar. 30, 2011 Putative shareholder derivative lawsuits item | Mar. 30, 2011 Putative shareholder derivative lawsuits item | Jun. 30, 2013 Putative shareholder derivative lawsuits | Jun. 30, 2013 SEC Inquiry
LEGAL PROCEEDINGS |  |  |  |  |  |  |  |  |  |  |
Number of alleged confidential informants |  |  |  |  |  | 6 |  |  |  |  |
Settlement amount payable |  |  |  |  |  |  | $ 3,915 |  |  | $ 495 |
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 |  |
Estimated loss due to legal matter | 0 |  |  | 0 |  |  |  |  |  |  | 0
Number of facilities where search was conducted |  |  | 1 |  |  |  |  |  |  |  |
Estimate of remediation-related costs and expenses | 254 | 352 |  |  | 675 |  |  |  |  |  |
Additional remediation related expenses |  |  |  | $ 0 |  |  |  |  |  |  |

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- Definition Total costs accrued as of the balance sheet date for environmental loss contingencies. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13207-110859 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 96-1 -Paragraph 161 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14326-108349 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 25 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6395460&loc=d3e13647-108346 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 5 -Paragraph 9 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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