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INVESTMENT SECURITIES - INVESTMENT CATEGORY (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Available-for-sale debt securities |  |
Less than 12 months Fair Value | $ 294,583 | $ 355,064
Less than 12 months Unrealized Losses | (14,947) | (15,999)
12 months or more Fair Value | 302,783 | 237,202
12 months or more Unrealized Losses | (28,244) | (28,076)
Total Fair Value | 597,366 | 592,266
Total Unrealized Losses | $ (43,191) | $ (44,075)
Number of securities held | 197 | 179
Number of securities held in an unrealized loss position | 179 | 163
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 | $ 218,670 | $ 229,372
Less than 12 months Unrealized Losses | (7,852) | (7,139)
12 months or more Fair Value | 188,687 | 171,676
12 months or more Unrealized Losses | (16,241) | (18,054)
Total Fair Value | 407,357 | 401,048
Total Unrealized Losses | (24,093) | (25,193)
Mortgage backed securities - residential |  |
Available-for-sale debt securities |  |
Less than 12 months Fair Value | 63,616 | 105,274
Less than 12 months Unrealized Losses | (6,546) | (7,434)
12 months or more Fair Value | 101,546 | 65,520
12 months or more Unrealized Losses | (11,023) | (10,021)
Total Fair Value | 165,162 | 170,794
Total Unrealized Losses | (17,569) | (17,455)
Collateralized mortgage obligations |  |
Available-for-sale debt securities |  |
Less than 12 months Fair Value | 8,551 | 20,418
Less than 12 months Unrealized Losses | (525) | (1,426)
12 months or more Fair Value | 12,550 | 6
12 months or more Unrealized Losses | (980) | (1)
Total Fair Value | 21,101 | 20,424
Total Unrealized Losses | (1,505) | $ (1,427)
Trust Preferred Securities |  |
Available-for-sale debt securities |  |
Less than 12 months Fair Value | 3,746 |
Less than 12 months Unrealized Losses | (24) |
Total Fair Value | 3,746 |
Total Unrealized Losses | $ (24) |

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