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MARKETABLE SECURITIES - Schedule of Amortized Cost and Fair Value of Securities Available for Sale and Held to Maturity Securities (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Available for sale: |  |
Available-for-sale debt securities, amortized cost basis | $ 261,789 | $ 215,380
Gross Unrealized Gains | 913 | 1,215
Gross Unrealized Losses | 20,040 | 20,400
Estimated Fair Value | 242,662 | 196,195
Held to maturity: |  |
Amortized Cost | 347,992 | 404,208
Gross Unrealized Gains | 316 | 923
Gross Unrealized Losses | 31,985 | 30,608
Estimated Fair Value | 316,323 | 374,523
U.S. government agencies |  |
Held to maturity: |  |
Amortized Cost | 9,370 | 9,292
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 1,058 | 1,066
Estimated Fair Value | 8,312 | 8,226
Corporate bonds |  |
Available for sale: |  |
Available-for-sale debt securities, amortized cost basis | 29,842 | 29,882
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 2,473 | 3,077
Estimated Fair Value | 27,369 | 26,805
Municipal securities |  |
Available for sale: |  |
Available-for-sale debt securities, amortized cost basis | 2,320 | 2,322
Gross Unrealized Gains | 90 | 182
Gross Unrealized Losses | 0 | 0
Estimated Fair Value | 2,410 | 2,504
Held to maturity: |  |
Amortized Cost | 158,734 | 168,175
Gross Unrealized Gains | 316 | 923
Gross Unrealized Losses | 7,459 | 6,123
Estimated Fair Value | 151,591 | 162,975
Mortgage-backed securities |  |
Available for sale: |  |
Available-for-sale debt securities, amortized cost basis | 212,663 | 164,419
Gross Unrealized Gains | 821 | 1,014
Gross Unrealized Losses | 15,888 | 15,621
Estimated Fair Value | 197,596 | 149,812
Held to maturity: |  |
Amortized Cost | 114,702 | 119,872
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 15,665 | 15,105
Estimated Fair Value | 99,037 | 104,767
Collateralized mortgage obligations |  |
Available for sale: |  |
Available-for-sale debt securities, amortized cost basis | 16,964 | 18,757
Gross Unrealized Gains | 2 | 19
Gross Unrealized Losses | 1,679 | 1,702
Estimated Fair Value | 15,287 | 17,074
Held to maturity: |  |
Amortized Cost | 35,521 | 37,437
Gross Unrealized Losses | 7,238 | 7,276
Estimated Fair Value | 28,283 | 30,161
Treasury securities |  |
Held to maturity: |  |
Amortized Cost | 29,665 | 69,432
Gross Unrealized Losses | 565 | 1,038
Estimated Fair Value | $ 29,100 | $ 68,394

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