PENSION AND POSTRETIREMENT WELFARE PLANS (Details 3) (USD $)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011
Pension Plan
Weighted average assumptions used to determine the benefit obligation
Discount rate	4.00%	4.75%
Rate of compensation increases	5.00%	5.00%
Weighted average assumptions used to determine net periodic expense
Discount rate	4.75%	5.75%
Expected long-term rate of return on plan assets	7.00%	7.50%
Rate of compensation increases	5.00%	5.00%
Expected contributions
Expected contributions during 2013	$ 276,000
Pension plans' actual percentage of plan assets and the target percentage of plan assets
Actual percentage of plan assets	100.00%	100.00%
Total (as a percent)	100.00%
Pension Plan \| Cash equivalents
Pension plans' actual percentage of plan assets and the target percentage of plan assets
Actual percentage of plan assets	4.00%	4.00%
Pension Plan \| Equity securities
Pension plans' actual percentage of plan assets and the target percentage of plan assets
Actual percentage of plan assets	65.00%	64.00%
Minimum (as a percent)	55.00%
Maximum (as a percent)	75.00%
Pension Plan \| Fixed income securities
Pension plans' actual percentage of plan assets and the target percentage of plan assets
Actual percentage of plan assets	31.00%	32.00%
Minimum (as a percent)	25.00%
Maximum (as a percent)	45.00%
Pension Plan \| Cash
Pension plans' actual percentage of plan assets and the target percentage of plan assets
Minimum (as a percent)	0.00%
Maximum (as a percent)	20.00%
Postretirement Welfare Plan
Weighted average assumptions used to determine the benefit obligation
Discount rate	4.00%	4.75%
Weighted average assumptions used to determine net periodic expense
Discount rate	4.75%	5.75%

The interest rate used to adjust for the time value of money for the plan.

Reference 1: 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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (k)(1)

-URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920

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Expected rate of compensation increases (for pay-related plans).

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The interest rate used to adjust for the time value of money.

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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=21915506&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

-Topic 715

-SubTopic 30

-Glossary Expected Long-Term Rate of Return on Plan Assets

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Expected rate of compensation increases (for pay-related plans).

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The employer's best estimate, as soon as it can be reasonably determined, of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest statement of financial position. Estimated contributions may be presented in the aggregate combining (1) contributions required by funding regulations or laws, (2) discretionary contributions, and (3) noncash contributions.

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Target allocation of investments of this type to total plan assets presented on a weighted average basis.

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Target allocation maximum percentage of investments of this type to total plan assets presented on a weighted average basis.

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Target allocation minimum percentage of investments of this type to total plan assets presented on a weighted average basis.

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Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 5

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e2446-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

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-URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

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