v3.26.1
INVESTMENT SECURITIES - Number and aggregate depreciation (Details) - item
Mar. 31, 2026
Dec. 31, 2025
INVESTMENT SECURITIES    
Number of securities in a loss position 12 12
Aggregate depreciation (5.16%) (4.67%)
Municipal securities    
INVESTMENT SECURITIES    
Number of securities in a loss position 1 1
Aggregate depreciation (0.67%) (0.79%)
Collateralized mortgage obligation bonds    
INVESTMENT SECURITIES    
Number of securities in a loss position 1 1
Aggregate depreciation (2.80%) (2.48%)
U.S. government agencies    
INVESTMENT SECURITIES    
Number of securities in a loss position 2 2
Aggregate depreciation (4.60%) (4.00%)
Mortgage-backed securities    
INVESTMENT SECURITIES    
Number of securities in a loss position 8 8
Aggregate depreciation (9.06%) (8.22%)