INVESTMENT SECURITIES - INVESTMENT CATEGORY (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Available-for-sale debt securities
Less than 12 months Fair Value	$ 457,253	$ 266,570
Less than 12 months Unrealized Losses	(27,872)	(3,125)
12 months or more Fair Value	158,716	9,728
12 months or more Unrealized Losses	(18,097)	(272)
Total Fair Value	615,969	276,298
Total Unrealized Losses	$ (45,969)	$ (3,397)
Number of securities held	181	173
Number of securities held in an unrealized loss position	149	29
Maximum percentage of holdings of securities of any one issuer, other than the U.S. Government and its agencies	10.00%	10.00%
U.S. Treasury securities and U.S. Government agencies
Available-for-sale debt securities
Less than 12 months Fair Value	$ 266,165	$ 177,138
Less than 12 months Unrealized Losses	(10,276)	(2,622)
12 months or more Fair Value	144,296	9,728
12 months or more Unrealized Losses	(15,576)	(272)
Total Fair Value	410,461	186,866
Total Unrealized Losses	(25,852)	(2,894)
Mortgage backed securities - residential
Available-for-sale debt securities
Less than 12 months Fair Value	162,445	84,937
Less than 12 months Unrealized Losses	(16,808)	(473)
12 months or more Fair Value	14,420
12 months or more Unrealized Losses	(2,521)
Total Fair Value	176,865	84,937
Total Unrealized Losses	(19,329)	(473)
Collateralized mortgage obligations
Available-for-sale debt securities
Less than 12 months Fair Value	18,645	4,495
Less than 12 months Unrealized Losses	(786)	(30)
Total Fair Value	18,645	4,495
Total Unrealized Losses	(786)	$ (30)
Corporate bonds
Available-for-sale debt securities
Less than 12 months Fair Value	9,998
Less than 12 months Unrealized Losses	(2)
Total Fair Value	9,998
Total Unrealized Losses	$ (2)