SECURITIES AVAILABLE FOR SALE - Maturity of Available for Sale Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Amortized Cost
Within 1 year	$ 11,755
Over 1 year to 5 years	23,313
Over 5 years to 10 years	48,500
Over 10 years	157,879
Total bonds and obligations	241,447
Mortgage-backed securities	298,139
Amortized Cost	539,586	$ 571,977
Fair Value
Within 1 year	11,664
Over 1 year to 5 years	23,863
Over 5 years to 10 years	47,493
Over 10 years	161,419
Total bonds and obligations	244,439
Mortgage-backed securities	300,888
Total securities available for sale	$ 545,327	$ 585,046