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INVESTMENTS - Additional Information (Details)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2025
USD ($)
Mar. 31, 2024
USD ($)
Dec. 31, 2024
USD ($)
Gain (Loss) on Securities [Line Items]      
Proceeds from Sale of Debt Securities, Available-for-sale $ 164,535 $ 211,959  
Debt Securities, Available-for-sale, Realized Gain 100 400  
Available-for-sale Securities, Gross Realized Losses 10,000 7,900  
Debt Securities, Held-to-maturity, Allowance for Credit Loss $ 0   $ 0
NumberOfSecuritiesInSecurityPortfolio 762   743
NumberOfSecuritiesInUnrealizedLossPosition 582   644
Debt Securities, Held-to-maturity, Nonaccrual $ 0   $ 0
Net gain (loss) on investment securities (9,949) (5,187)  
Debt Securities, Available-for-Sale, Unrealized Loss Position 2,250,514   2,531,876
Debt Securities, Unrealized Gain (Loss)     1,100
Net gain (loss) on equity securities   $ 2,200  
Financial Instrument, Other      
Gain (Loss) on Securities [Line Items]      
Debt Securities, Available-for-Sale, Unrealized Loss Position $ 11,100   $ 11,100