v2.4.0.6
EMPLOYEE RETIREMENT PLANS (Details 4) (Pension Benefits, USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Pension Benefits
     
Components of net periodic benefit cost (income):      
Interest cost $ 7,193,000 $ 7,397,000 $ 7,747,000
Expected return on assets (8,689,000) (9,548,000) (9,854,000)
Amortization of:      
Prior service cost 4,000 4,000 4,000
Actuarial loss 1,680,000 1,539,000 794,000
Total net periodic benefit cost (income) 188,000 (608,000) (1,309,000)
Major assumption used to determine benefit obligations      
Weighted average discount rate (as a percent) 4.00% 5.00%  
Major assumptions used to determine net periodic benefit (income) cost      
Discount rate (as a percent) 5.00% 5.48% 6.00%
Expected long-term rate of return on plan assets (as a percent) 8.25% 8.49% 8.66%
Employee retirement plans, other disclosures      
Direct benefits paid from employer assets 400,000 400,000 400,000
Expected contributions in the next fiscal year 400,000    
Expected benefit payments:      
2013 6,150,000    
2014 6,802,000    
2015 7,410,000    
2016 7,996,000    
2017 8,525,000    
2018-2022 $ 49,318,000