General form of registration statement for all companies including face-amount certificate companies

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Schedule of Concentration Risk) (Details)

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Schedule of Concentration Risk) (Details) - Revenue Benchmark - Customer Concentration Risk
9 Months Ended 12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Dec. 31, 2019
Customer A        
Concentration Risk [Line Items]        
Concentration risk, percentage 8.00% 10.00% 8.00% 11.00%
Customer B        
Concentration Risk [Line Items]        
Concentration risk, percentage     10.00% 10.00%