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Other Assets - Additional Information (Details)
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Bottom of range    
Disclosure of investments held for self insured liabilities maturity of bond portfolio at fair value [line items]    
Bonds interest rate 0.88% 0.75%
Top of range    
Disclosure of investments held for self insured liabilities maturity of bond portfolio at fair value [line items]    
Bonds interest rate 4.25% 5.00%