RETIREMENT PLAN AND POST-RETIREMENT BENEFITS, Allocation of Plan Assets (Details)	Dec. 31, 2011
Pension Benefits [Member] | Cash and Cash Equivalents [Member]
Allocation of Plan Assets [Abstract]
Defined Benefit Plan, Actual Plan Asset Allocations	5.00%
Pension Benefits [Member] | U S Equity Securities [Member]
Allocation of Plan Assets [Abstract]
Defined Benefit Plan, Actual Plan Asset Allocations	19.00%
Defined Benefit Plan Weighted Average Target Allocation Percentage Of Assets	20.00%
Pension Benefits [Member] | International Equity Securities [Member]
Allocation of Plan Assets [Abstract]
Defined Benefit Plan, Actual Plan Asset Allocations	14.00%
Defined Benefit Plan Weighted Average Target Allocation Percentage Of Assets	15.00%
Pension Benefits [Member] | Fixed Income Funds [Member]
Allocation of Plan Assets [Abstract]
Defined Benefit Plan, Actual Plan Asset Allocations	61.00%
Defined Benefit Plan Weighted Average Target Allocation Percentage Of Assets	65.00%
Pension Benefits [Member] | Other [Member]
Allocation of Plan Assets [Abstract]
Defined Benefit Plan, Actual Plan Asset Allocations	1.00%
Other Post-Retirement Benefits [Member] | Cash and Cash Equivalents [Member]
Allocation of Plan Assets [Abstract]
Defined Benefit Plan, Actual Plan Asset Allocations	3.00%
Other Post-Retirement Benefits [Member] | Equity Securities [Member]
Allocation of Plan Assets [Abstract]
Defined Benefit Plan, Actual Plan Asset Allocations	51.00%
Defined Benefit Plan Weighted Average Target Allocation Percentage Of Assets	60.00%
Other Post-Retirement Benefits [Member] | Fixed Income Funds [Member]
Allocation of Plan Assets [Abstract]
Defined Benefit Plan, Actual Plan Asset Allocations	46.00%
Defined Benefit Plan Weighted Average Target Allocation Percentage Of Assets	40.00%