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SECURITIES - Amortized cost and Fair values of securities with gross unrealized gains and losses (Details) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2022 | Dec. 31, 2021
Available-for-sale |  |
Amortized Cost | $ 987,752 | $ 938,360
Gross Unrealized Gains | 572 | 12,796
Gross Unrealized Losses | (63,618) | (8,988)
Fair Value | 924,706 | 942,168
Held-to-maturity |  |
Amortized Cost | 548,236 | 336,185
Gross Unrealized Gains | 697 | 2,796
Gross Unrealized Losses | (38,781) | (2,954)
Fair Value | 510,152 | 336,027
Total Amortized Cost | 1,535,988 | 1,274,545
Total Gross Unrealized Gains | 1,269 | 15,592
Total Gross Unrealized Losses | (102,399) | (11,942)
Total Fair Value | 1,434,858 | 1,278,195
U.S. Treasury |  |
Available-for-sale |  |
Amortized Cost | 169,930 | 109,002
Gross Unrealized Gains |  | 328
Gross Unrealized Losses | (10,725) | (354)
Fair Value | 159,205 | 108,976
U.S. government agency |  |
Available-for-sale |  |
Amortized Cost | 60,373 | 129,269
Gross Unrealized Gains |  | 1,303
Gross Unrealized Losses | (2,156) | (2,467)
Fair Value | 58,217 | 128,105
Held-to-maturity |  |
Amortized Cost | 88,413 | 12,349
Gross Unrealized Gains |  | 42
Gross Unrealized Losses | (5,364) | (51)
Fair Value | 83,049 | 12,340
Municipal securities |  |
Available-for-sale |  |
Amortized Cost | 286,012 | 293,837
Gross Unrealized Gains | 190 | 6,144
Gross Unrealized Losses | (25,661) | (2,904)
Fair Value | 260,541 | 297,077
Held-to-maturity |  |
Amortized Cost | 40,920 | 15,666
Gross Unrealized Gains | 376 | 809
Gross Unrealized Losses | (66) |
Fair Value | 41,230 | 16,475
Mortgage-backed: Agency residential |  |
Available-for-sale |  |
Amortized Cost | 236,516 | 178,236
Gross Unrealized Gains | 152 | 2,149
Gross Unrealized Losses | (11,626) | (919)
Fair Value | 225,042 | 179,466
Held-to-maturity |  |
Amortized Cost | 108,711 | 20,555
Gross Unrealized Gains | 276 | 196
Gross Unrealized Losses | (1,971) | (102)
Fair Value | 107,016 | 20,649
Mortgage-backed: Agency commercial |  |
Available-for-sale |  |
Amortized Cost | 160,576 | 164,875
Gross Unrealized Gains | 15 | 1,234
Gross Unrealized Losses | (11,355) | (2,048)
Fair Value | 149,236 | 164,061
Held-to-maturity |  |
Amortized Cost | 310,192 | 287,615
Gross Unrealized Gains | 45 | 1,749
Gross Unrealized Losses | (31,380) | (2,801)
Fair Value | 278,857 | 286,563
Corporate |  |
Available-for-sale |  |
Amortized Cost | 74,345 | 63,141
Gross Unrealized Gains | 215 | 1,638
Gross Unrealized Losses | (2,095) | (296)
Fair Value | $ 72,465 | $ 64,483

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- Definition Amount of accumulated unrecognized gain on investment in debt security available for sale and held to maturity at amortized cost. + References No definition available. + Details
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