MARKETABLE SECURITIES - Contractual Maturities of Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Amortized Cost
Due within one year	$ 7,498
Due after one year through five years	2,033
Due after five years through ten years	22,631
Due after ten years	0
Available-for-sale debt securities, amortized cost basis	261,789	$ 215,380
Estimated Fair Value
Due within one year	7,413
Due after one year through five years	1,926
Due after five years through ten years	20,440
Due after ten years	0
Available-for-sale debt securities, estimated fair value	242,662	196,195
Held to Maturity Amortized Cost
Due within one year	33,497
Due after one year through five years	41,514
Due after five years through ten years	86,505
Due after ten years	36,253
Held to Maturity debt securities, amortized cost	347,992	404,208
Held to Maturity Estimated Fair Value
Due within one year	32,917
Due after one year through five years	39,518
Due after five years through ten years	83,041
Due after ten years	33,527
Held to maturity debt securities, estimated fair value	316,323	374,523
Mortgage-backed securities
Amortized Cost
Available-for-sale debt securities, amortized cost basis	212,663
Available-for-sale debt securities, amortized cost basis	212,663	164,419
Estimated Fair Value
Available-for-sale debt securities, estimated fair value	197,596
Available-for-sale debt securities, estimated fair value	197,596	149,812
Held to Maturity Amortized Cost
Held to Maturity debt securities, amortized cost	114,702
Held to Maturity debt securities, amortized cost	114,702	119,872
Held to Maturity Estimated Fair Value
Held to maturity debt securities, estimated fair value	99,037
Held to maturity debt securities, estimated fair value	99,037	104,767
Collateralized mortgage obligations
Amortized Cost
Available-for-sale debt securities, amortized cost basis	16,964
Available-for-sale debt securities, amortized cost basis	16,964	18,757
Estimated Fair Value
Available-for-sale debt securities, estimated fair value	15,287
Available-for-sale debt securities, estimated fair value	15,287	17,074
Held to Maturity Amortized Cost
Held to Maturity debt securities, amortized cost	35,521
Held to Maturity debt securities, amortized cost	35,521	37,437
Held to Maturity Estimated Fair Value
Held to maturity debt securities, estimated fair value	28,283
Held to maturity debt securities, estimated fair value	$ 28,283	$ 30,161