LEASES - Narrative (Details) ft² in Thousands, $ in Millions	1 Months Ended	12 Months Ended
	May 31, 2024 USD ($) installment	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Sep. 30, 2024 USD ($) ft² term	Sep. 01, 2024
Leases
Option to terminate period (in years)		1 year
Right of use assets obtained in exchange for lease liabilities		$ 8.3	$ 26.7
Additional operating lease liabilities		8.3
Minimum lease payments		$ 167.7
Office Space In Lenexa, Kansas
Leases
Reduction fee	$ 1.3
Number of installments, reduction fee payable | installment	2
Right of use asset, decrease due to reduction in lease term			10.3
Decrease in operating lease of lease liabilities due to reduction in lease term			11.0
Office Space In Overland Park, Kansas
Leases
Renewal term (in years)					60 months
Square feet of office space | ft²					60
Term of contract (in years)						129 months
Number of terms available to renew | term					2
Minimum lease payments					$ 12.0
Minimum
Leases
Renewal term (in years)		1 year
Maximum
Leases
Renewal term (in years)		5 years
Option to terminate period (in years)		1 year
Other Income | Office Space In Lenexa, Kansas
Leases
Gain on lease termination			0.7
Technology support services
Leases
Rent expense		$ 37.9	$ 37.1	$ 34.5