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INVESTMENT SECURITIES - PRIVATE LABEL MORTGAGE-BACKED SECURITY (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Bank's private label mortgage backed security credit losses recognized in earnings    
Number of securities held 179 173
Available-for-sale debt securities $ 622,145 $ 495,126
Private label mortgage backed security    
Bank's private label mortgage backed security credit losses recognized in earnings    
Number of securities held 1  
Available-for-sale debt securities $ 2,478 $ 2,731