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EMPLOYEE BENEFIT PLANS (Details 3) (USD $) | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2013 acre | Nov. 30, 2012 acre | Apr. 30, 2011 acre | Dec. 31, 2013 plan acre | Dec. 31, 2012 | Oct. 31, 2011 plan | Dec. 31, 2009
EMPLOYEE BENEFIT PLANS |  |  |  |  |  |  |
Expected contribution to the defined benefit pension plans in the next fiscal year |  |  |  | $ 2,800,000 |  |  |
Estimated future benefit payments |  |  |  |  |  |  |
2014 |  |  |  | 4,465,000 |  |  |
2015 |  |  |  | 4,430,000 |  |  |
2016 |  |  |  | 4,433,000 |  |  |
2017 |  |  |  | 4,463,000 |  |  |
2018 |  |  |  | 4,498,000 |  |  |
2019 - 2023 |  |  |  | 22,493,000 |  |  |
Security to support the unfunded liabilities of the Bargaining Plan |  |  |  |  |  |  | 5,200,000
Area of property pledged as security (in acres) |  | 7,000 | 1,400 |  |  |  |
Period for release of property pledged as collateral |  | 5 years | 5 years |  |  |  |
Additional security to support unfunded liabilities |  |  |  |  |  | 18,700,000 |
Number of pension plans |  |  |  |  |  | 2 |
Area of parcel proposed to be sold (in acres) | 270 |  |  |  |  |  |
Unfunded pension fund liabilities |  |  |  | 20,900,000 |  |  |
Area of property held as collateral for unfunded pension obligations (in acres) |  |  |  | 8,400 |  |  |
Carrying value of property held as collateral for unfunded pension obligations |  |  |  | 1,800,000 |  |  |
Minimum number of investment and savings plans in which the majority of employees are eligible to participate |  |  |  | 1 |  |  |
Company contributions |  |  |  | 0 | 0 |  |
Deferred compensation plan liabilities |  |  |  | $ 340,000 | $ 512,000 |  |

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