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EMPLOYEE BENEFIT PLANS (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2016
USD ($)
Plan
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
EMPLOYEE BENEFIT PLANS [Abstract]          
Number of savings plan | Plan 2        
Provision for profit sharing contributions $ 712 $ 738 $ 938    
Provision for matching 401(k) savings plan contributions 2,248 1,886 804    
Change in benefit obligation [Roll Forward]          
Benefit obligation at beginning of period 958 1,111      
Initial adoption of new plan 444 0      
Service cost with interest to end of year 66 54 57    
Interest cost 48 36 48    
Participant contributions 5 5      
Benefits paid (9) (6)      
Actuarial gain (101) (242)      
Benefit obligation at end of period 1,411 958 1,111    
Change in plan assets [Roll Forward]          
Fair value of plan assets at beginning of year 0 0      
Employer (reimbursement)/contributions 4 1      
Participant contributions 5 5      
Benefits paid (9) (6)      
Fair value of plan assets at end of year 0 0 0    
Amounts recognized in consolidated balance sheet [Abstract]          
Accumulated postretirement benefit obligation       $ (1,411) $ (958)
Fair value of plan assets 0 0 0 0 0
Funded status       (1,411) (958)
Unrecognized prior service cost      
Unrecognized net (gain)/loss      
Net amount recognized in consolidated balance sheet (after ASC 715) (included in other long-term obligations)       1,411 958
Accrued postretirement benefit cost (included in other long-term obligations)      
Components of net periodic benefit cost [Abstract]          
Service cost with interest to end of year 66 54 57    
Interest cost 48 36 48    
Amortization of prior service credit/(cost 57 (18) (18)    
Amortization of (gain)/loss (10) 0 6    
Total net periodic benefit cost $ 161 72 93    
Estimated future employer contributions and benefit payments [Abstract]          
2017       88  
2018       106  
2019       96  
2020       90  
2021       88  
Years 2022-2026       $ 581  
Assumed health care cost trend rates [Abstract]          
Trend rate assumed for next fiscal year 7.07%        
Ultimate health care cost trend rate 4.50%        
Year that rate reaches ultimate trend rate       2038  
Effect of one percentage point increase in health care cost trend rates on accumulated postretirement benefit obligation $ 125        
Effect of one percentage point increase in health care cost trend rates on net periodic postretirement benefit cost 15        
Effect of one percentage point decrease in health care cost trend rates on accumulated postretirement benefit obligation 110        
Effect of one percentage point decrease in health care cost trend rates on net periodic postretirement benefit cost $ 13        
Weighted average discount rate used in determining the accumulated postretirement benefit obligation       3.40% 3.70%
Pension fund [Abstract]          
Percentage that plans in the red zone are generally funded, maximum 65.00%        
Percentage that plans in the yellow zone are generally funded, maximum 80.00%        
Percentage that plans in the green zone are generally funded, minimum 80.00%        
Increase in contribution rate 4.00%        
Contributions to multiemployer pension fund as a percentage of total contributions to fund, maximum 5.00%        
Contributions of Balchem Corporation $ 576 $ 515 $ 498    
Surcharge Imposed $ 0        
Expiration Date of collective-Bargaining Agreement May 31, 2017