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RETIREMENT AND DEFERRED COMPENSATION PLANS (Schedule of Estimated Benefit Payments to Defined Benefit Plans) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Defined contribution plan - Domestic Plans      
Definted contribution plan      
Total contributions by Company $ 3,000 $ 2,800 $ 2,600
Defined contribution plan - Domestic Plans | Maximum      
Definted contribution plan      
Employer matching contribution as a percentage of salary 3.00%    
Defined contribution plan - Foreign Plans      
Definted contribution plan      
Total contributions by Company $ 2,100 $ 2,300 $ 2,100
Domestic Plans      
Estimated benefit payments relating to defined benefit plans over the next ten years      
2016 7,489    
2017 7,861    
2018 8,393    
2019 8,622    
2020 9,302    
2021 - 2025 58,818    
Foreign Plans      
Estimated benefit payments relating to defined benefit plans over the next ten years      
2016 1,831    
2017 1,751    
2018 2,355    
2019 2,705    
2020 3,996    
2021 - 2025 $ 21,751