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RETIREMENT ANNUITY AND GUARANTEED CONTINUOUS EMPLOYMENT PLANS (Textual) (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2018
USD ($)
Sep. 30, 2018
USD ($)
Mar. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Sep. 30, 2017
USD ($)
Dec. 31, 2018
USD ($)
hours
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
After-tax amounts included in Accumulated other comprehensive loss                
Unrecognized actuarial net loss $ 81,580         $ 81,580    
Unrecognized prior service credits 446         446    
Unrecognized transition obligations 23         23    
Pre-tax amounts expected to be recognized as components of net periodic benefit cost during next fiscal year                
Unrecognized actuarial net loss 3,924         3,924    
Unrecognized prior service credits 59         59    
Unrecognized transition obligations 3         3    
Total accumulated benefit obligation for all plans 600,998     $ 691,827   $ 600,998 $ 691,827  
Other Benefits                
Minimum percentage of every standard work week for which, the Company will provide work to employees in Cleveland, Ohio, area operations, covered under the guaranteed continuous employment plan (as a percent)           75.00%    
Hours in a standard work week under Guaranteed Continuous Employment Plan (hours) | hours           40    
Minimum notice period for the termination of Guaranteed Continuous Employment Plan (in months)           6 months    
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment (1,696) $ (4,232) $ (758) (2,867) $ (5,283)      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment               $ (2,206)
Supplemental executive retirement plan (SERP)                
Supplemental Executive Retirement Plan                
Total net pension costs           $ 1,268 772 2,113
Projected benefit obligation $ 12,183     $ 17,047   $ 12,183 $ 17,047 16,738
Other Benefits                
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment               $ (1,144)
Equity Securities | Minimum                
Target allocation for pension plan assets                
Target plan asset allocations range minimum 10.00%         10.00%    
Equity Securities | Maximum                
Target allocation for pension plan assets                
Target plan asset allocations range minimum 20.00%         20.00%    
Debt Securities | Minimum                
Target allocation for pension plan assets                
Target plan asset allocations range minimum 80.00%         80.00%    
Debt Securities | Maximum                
Target allocation for pension plan assets                
Target plan asset allocations range minimum 90.00%         90.00%