INVESTMENTS - Marketable Securities (Details) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2025 USD ($)	Dec. 31, 2025 USD ($) security	Dec. 31, 2024 USD ($) security
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Outstanding Face Amount		$ 272,809	$ 153,313
Carrying Value		$ 273,151	$ 163,489
Number of non rated securities \| security		15	6
Investment grade debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Outstanding Face Amount		$ 202,358	$ 121,278
Net Fair Value Adjustment	$ (102)	1,500
Carrying Value		203,858	121,176
Below investment grade debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Outstanding Face Amount		29,648	7,897
Net Fair Value Adjustment	(90)	(521)
Carrying Value		29,127	7,807
Residual interest securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Outstanding Face Amount		40,803	24,138
Net Fair Value Adjustment	10,368	(637)
Carrying Value		40,166	$ 34,506
Marketable securities:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net Fair Value Adjustment	$ 10,176	$ 342
Number of non rated securities \| security		20	11
Non-Rated Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Outstanding Face Amount		$ 20,900	$ 15,100
Interest-Only Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Outstanding Face Amount		19,900	9,100
Debt securities collateralized under repurchase agreements
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Value		$ 231,800	$ 129,000