SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Estimated Useful Lives (Details)	Dec. 31, 2023
Buildings and building improvements | Minimum
Property and Equipment
Estimated useful lives (in years)	10 years
Buildings and building improvements | Maximum
Property and Equipment
Estimated useful lives (in years)	39 years
Computer equipment and capitalized software | Minimum
Property and Equipment
Estimated useful lives (in years)	2 years
Computer equipment and capitalized software | Maximum
Property and Equipment
Estimated useful lives (in years)	3 years
Furniture and other equipment
Property and Equipment
Estimated useful lives (in years)	5 years
Leasehold improvements | Minimum
Property and Equipment
Estimated useful lives (in years)	6 years
Leasehold improvements | Maximum
Property and Equipment
Estimated useful lives (in years)	10 years