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EMPLOYEE BENEFIT PLANS, Plan Asset Allocations (Details) (Pension Benefits [Member]) | 12 Months Ended
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Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Pension Benefits [Member] |  |  |
Target allocation [Abstract] |  |  |
Domestic equity securities (in hundredths) | 53.00% |  |
International equity securities (in hundredths) | 15.00% |  |
Debt securities (in hundredths) | 22.00% |  |
Real estate (in hundredths) | 10.00% |  |
Other and cash (in hundredths) | 0.00% |  |
Total (in hundredths) | 100.00% |  |
Weighted-average allocations [Abstract] |  |  |
Domestic equity securities (in hundredths) | 59.00% | 62.00% |
International equity securities (in hundredths) | 14.00% | 11.00% |
Debt securities (in hundredths) | 17.00% | 16.00% |
Real estate (in hundredths) | 6.00% | 4.00% |
Other and cash (in hundredths) | 4.00% | 7.00% |
Total (in hundredths) | 100.00% | 100.00% |
Basis used to determine long-term rate of return assumption [Abstract] |  |  |
One-year pension returns (losses) (in hundredths) | (4.20%) |  |
Three-year pension returns (losses) (in hundredths) | 8.80% |  |
Five-year pension returns (losses) (in hundredths) | (0.30%) |  |
Long-term average return since plan inception (in hundredths) | 8.00% |  |
Long-term rate of return assumption (in hundredths) | 8.25% | 8.25% | 8.50%

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- Definition An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(3) -URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 264 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph j -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 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Expected Long-Term Rate of Return on Plan Assets -URI http://asc.fasb.org/extlink&oid=6512013 -Topic 715 -SubTopic 30 + Details
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