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Commitments and Contingencies (Details Textual) (USD $) | 1 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2007 | Jun. 30, 2013
Commitments and Contingencies (Textual) [Abstract] |  |
Company made payments to Lower Willamette Group as interim settlement | $ 175,000 |
Maximum amount anticipated to spend for further Source Control work |  | 100,000
Total stand by letters of credit |  | 3,100,000
Adjustment related to contingency liability in Portland Harbor matters |  | $ 0

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- Details
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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
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- Definition Amount of judgment or settlement awarded to (against) the entity in respect of litigation. + References No definition available. + Details
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- Definition Amount of increase (decrease) in loss contingency liability. + References Reference 1: 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=25496072&loc=d3e14326-108349 + Details
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