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BENEFIT PLANS (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2014
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]        
Pension settlement charges $ 21,623 $ 0 $ 0 $ 21,623
Net actuarial loss recognized in accumulated other comprehensive income (loss)   1,550 1,724  
Amounts recognized in balance sheets [Abstract]        
Current liabilities   (369) (287)  
Noncurrent liabilities   (7,305) (7,432)  
Total amount recognized in balance sheet   (7,674) (7,719)  
Net pension cost [Abstract]        
Amortization of prior service cost [1]   0 (432) (210)
Amortization of actuarial loss [1]   $ (102) (169) (244)
Curtailment loss recognized     (222)  
Pension Plan [Member]        
Change in benefit obligation [Roll Forward]        
Service cost       0
Interest cost       3,232
Net pension cost [Abstract]        
Service cost-benefits earned during the period       0
Interest cost on projected benefit obligation       3,232
Expected return on plan assets       (4,475)
Amortization of prior service cost       0
Amortization of actuarial loss       244
Settlement loss recognized       20,810
Curtailment loss recognized       0
Special termination benefit recognized       813
Net pension costs       20,624
SERP [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Percentage of final average earnings as annual benefits   55.00%    
Maximum amount of annual retirement benefits   $ 125    
Change in benefit obligation [Roll Forward]        
Benefit obligation at beginning of the year   7,719 7,270  
Service cost   0 129 117
Interest cost   341 314 289
Plan curtailments   0 (87)  
Actuarial losses (gains)   (72) 317  
Benefits paid   (314) (224)  
Benefit obligation at end of year 7,270 7,674 7,719 7,270
Change in plan assets [Roll Forward]        
Fair value of plan assets at beginning of year   0 0  
Employer contribution   314 224  
Benefits paid   (314) (224)  
Fair value of plan assets at end of year $ 0 0 0 0
Funded status of the plan - (underfunded)   (7,674) (7,719)  
Accumulated benefit obligations   7,674 7,719  
Net pension cost [Abstract]        
Service cost-benefits earned during the period   0 129 117
Interest cost on projected benefit obligation   341 314 289
Expected return on plan assets   0 0 0
Amortization of prior service cost   0 210 210
Amortization of actuarial loss   102 169 0
Settlement loss recognized   0 0 0
Curtailment loss recognized   0 222 0
Special termination benefit recognized   0 0 0
Net pension costs   443 $ 1,044 $ 616
Estimated amount that will be amortized from accumulated other comprehensive loss into net periodic cost   $ 100    
[1] These amounts are included in the computation of net periodic pension costs and were reclassified to selling, general and administrative costs. For 2015, this includes $222,000 in curtailment loss on the SERP.