DERIVATIVE INSTRUMENTS - Derivative Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Derivative Fair Values on Consolidated Balance Sheet [Line Items]
Derivative asset fair value	$ 7,309	$ 9,439
Derivative asset, statement of financial position [Extensible Enumeration]	Other assets	Other assets
Derivative liability fair value	$ 2,667	$ 3,100
Derivative liability, statement of financial position [Extensible Enumeration]	Other liabilities	Other liabilities
Not Designated as Hedging Instruments
Derivative Fair Values on Consolidated Balance Sheet [Line Items]
Derivative asset fair value	$ 7,309	$ 9,439
Derivative liability fair value	2,667	3,100
Not Designated as Hedging Instruments | Relating to investment portfolio: | Foreign exchange forward contracts
Derivative Fair Values on Consolidated Balance Sheet [Line Items]
Derivative notional amount	17,811	17,655
Derivative asset fair value	16	323
Derivative liability fair value	373	0
Not Designated as Hedging Instruments | Relating to underwriting portfolio: | Foreign exchange forward contracts
Derivative Fair Values on Consolidated Balance Sheet [Line Items]
Derivative notional amount	1,615,610	1,323,714
Derivative asset fair value	7,293	9,116
Derivative liability fair value	$ 2,294	$ 3,100