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Segment Information (Major Customers) (Details) | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Revenue, Major Customer [Line Items] |  |  |
Percentage of Major Customers Noted's Revenue Attributable to Chemicals Segment | 95.00% | 95.00% | 95.00%
Customer A [Member] |  |  |
Revenue, Major Customer [Line Items] |  |  |
Revenue from major customers as percentage of consolidated revenue | 16.20% | 15.60% | 13.10%
Customer B [Member] |  |  |
Revenue, Major Customer [Line Items] |  |  |
Revenue from major customers as percentage of consolidated revenue |  | 10.00% |
Customer C [Member] |  |  |
Revenue, Major Customer [Line Items] |  |  |
Revenue from major customers as percentage of consolidated revenue |  |  | 10.80%
Customer Concentration Risk [Member] | Sales Revenue, Net [Member] | Energy Chemical Technologies [Member] | Major Customers [Member] |  |  |
Revenue, Major Customer [Line Items] |  |  |
Revenue from major customers within segments | 95.00% |  |

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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13537-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13531-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 + Details
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