SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Useful Life) (Details)	12 Months Ended
	Dec. 31, 2020
Computer equipment and software
Property, Plant and Equipment [Line Items]
Useful Life	3 years
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Useful Life	7 years
Airplane
Property, Plant and Equipment [Line Items]
Useful Life	5 years
Real estate | Minimum
Property, Plant and Equipment [Line Items]
Useful Life	7 years
Real estate | Maximum
Property, Plant and Equipment [Line Items]
Useful Life	39 years