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EMPLOYEE BENEFIT PLANS (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
EMPLOYEE BENEFIT PLANS [Abstract]      
Rate of company matching 50.00% 50.00% 50.00%
Percentage of deferred salary which is matched 4.00% 4.00% 4.00%
Company contribution to the 401(K) plan $ 2.6 $ 2.5 $ 2.7