Annual report pursuant to Section 13 and 15(d)

EMPLOYEE BENEFIT PLANS - Narrative 2 (Details)

v3.20.4
EMPLOYEE BENEFIT PLANS - Narrative 2 (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Mar. 01, 2020
Defined Benefit Plan Disclosure [Line Items]        
Interest in CCHL subsidiary entity 51.00%     51.00%
Minimum [Member] | Equity Securities [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Target Allocation (in percent) 55.00%      
Minimum [Member] | Debt Securities [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Target Allocation (in percent) 17.00%      
Minimum [Member] | Cash and Cash Equivalents [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Target Allocation (in percent) 0.00%      
Maximum [Member] | Equity Securities [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Target Allocation (in percent) 81.00%      
Maximum [Member] | Debt Securities [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Target Allocation (in percent) 37.00%      
Maximum [Member] | Cash and Cash Equivalents [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Target Allocation (in percent) 10.00%      
Employee Benefit 401 K Plan [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Matching contributions (in percent) 50.00%      
Participant's compensation for eligible associates (in percent) 6.00%      
Matching contributions $ 0.8 $ 0.7 $ 0.6  
Shares reserved for issuance (in shares) 50,000      
Additional Employers Contribution for Associates Hired After Year 2019 as a percentage of compensation 3.00%      
Employee Benefit 401 K Plan [Member] | CCHL associates [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Matching contributions $ 0.5      
Employee Benefit 401 K Plan [Member] | Maximum [Member] | CCHL associates [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Matching contributions (in percent) 3.00%      
Dividend Reinvestment and Optional Stock Purchase Plan [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Shares reserved for issuance (in shares) 250,000