XML 112 R86.htm IDEA: XBRL DOCUMENT v3.20.4
EMPLOYEE BENEFIT PLANS - Additional Information (Details)
$ in Thousands
 1 Months Ended 3 Months Ended 12 Months Ended
Mar. 28, 2019
plan
Oct. 31, 2018
USD ($)
Mar. 31, 2019
USD ($)
Dec. 31, 2020
USD ($)
hour
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Defined Benefit Plan Disclosure [Line Items]            
Total Contributions       $ 1,956 $ 3,412 $ 4,284
Number of defined benefit plans acquired | plan 2          
Non-current liabilities       $ (9,200) (8,700)  
Maximum percentage of employees income available for contribution       100.00%    
Employer contribution expense       $ 700 $ 1,600 1,000
Dover Downs Pension Plan            
Defined Benefit Plan Disclosure [Line Items]            
Eligibility hours worked per year | hour       1,000    
Estimated net actuarial loss expected to be amortized       $ 200    
Expected return on plan assets       7.50% 7.50%  
Target allocations for plan assets       100.00%    
Minimum required pension contributions       $ 500    
Expected employer contributions       $ 700    
Dover Downs Pension Plan | Equity Securities            
Defined Benefit Plan Disclosure [Line Items]            
Target allocations for plan assets       60.00%    
Dover Downs Pension Plan | Equity Securities | Passively managed            
Defined Benefit Plan Disclosure [Line Items]            
Target allocations for plan assets       50.00%    
Dover Downs Pension Plan | Equity Securities | Actively managed            
Defined Benefit Plan Disclosure [Line Items]            
Target allocations for plan assets       50.00%    
Dover Downs Pension Plan | Debt Securities            
Defined Benefit Plan Disclosure [Line Items]            
Target allocations for plan assets       40.00%    
Excess Plan            
Defined Benefit Plan Disclosure [Line Items]            
Settlement payment     $ 500      
New England Teamsters and Trucking Industry Pension Fund            
Defined Benefit Plan Disclosure [Line Items]            
Advertising, general and administrative expense   $ 3,700       3,700
Certain bargaining agreements            
Defined Benefit Plan Disclosure [Line Items]            
Total Contributions       $ 1,200 $ 2,600 $ 2,700