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INVESTMENT SECURITIES - Summary of Investment Securities With Unrealized Losses (Detail) $ in Thousands | Dec. 31, 2023 USD ($) security | Dec. 31, 2022 USD ($) security
--- | --- | ---
Number of Securities |  |
Less Than 12 Months | security | 12 | 63
12 Months or More | security | 91 | 46
Total | security | 103 | 109
Fair Value |  |
Less Than 12 Months | $ 27,525 | $ 295,839
12 Months or More | 422,911 | 206,080
Total | 450,436 | 501,919
Unrealized Losses |  |
Less Than 12 Months | 326 | 20,185
12 Months or More | 36,561 | 29,855
Total | $ 36,887 | $ 50,040
U.S. Treasury securities |  |
Number of Securities |  |
Less Than 12 Months | security | 0 | 0
12 Months or More | security | 3 | 3
Total | security | 3 | 3
Fair Value |  |
Less Than 12 Months | $ 0 | $ 0
12 Months or More | 17,840 | 17,291
Total | 17,840 | 17,291
Unrealized Losses |  |
Less Than 12 Months | 0 | 0
12 Months or More | 2,217 | 2,779
Total | $ 2,217 | $ 2,779
States and political subdivisions |  |
Number of Securities |  |
Less Than 12 Months | security | 4 | 29
12 Months or More | security | 40 | 17
Total | security | 44 | 46
Fair Value |  |
Less Than 12 Months | $ 2,419 | $ 135,579
12 Months or More | 199,933 | 60,102
Total | 202,352 | 195,681
Unrealized Losses |  |
Less Than 12 Months | 53 | 13,809
12 Months or More | 18,477 | 14,621
Total | $ 18,530 | $ 28,430
GSE residential MBSs |  |
Number of Securities |  |
Less Than 12 Months | security | 0 | 5
12 Months or More | security | 15 | 10
Total | security | 15 | 15
Fair Value |  |
Less Than 12 Months | $ 0 | $ 26,100
12 Months or More | 57,632 | 33,302
Total | 57,632 | 59,402
Unrealized Losses |  |
Less Than 12 Months | 0 | 925
12 Months or More | 4,037 | 3,451
Total | $ 4,037 | $ 4,376
GSE residential CMOs |  |
Number of Securities |  |
Less Than 12 Months | security | 4 | 8
12 Months or More | security | 14 | 9
Total | security | 18 | 17
Fair Value |  |
Less Than 12 Months | $ 12,710 | $ 28,732
12 Months or More | 56,765 | 39,646
Total | 69,475 | 68,378
Unrealized Losses |  |
Less Than 12 Months | 186 | 1,884
12 Months or More | 6,014 | 5,184
Total | $ 6,200 | $ 7,068
Non-agency CMOs |  |
Number of Securities |  |
Less Than 12 Months | security | 3 | 4
12 Months or More | security | 4 | 2
Total | security | 7 | 6
Fair Value |  |
Less Than 12 Months | $ 11,531 | $ 26,555
12 Months or More | 16,334 | 8,639
Total | 27,865 | 35,194
Unrealized Losses |  |
Less Than 12 Months | 83 | 1,135
12 Months or More | 3,726 | 1,648
Total | $ 3,809 | $ 2,783
Asset-backed |  |
Number of Securities |  |
Less Than 12 Months | security | 1 | 17
12 Months or More | security | 15 | 5
Total | security | 16 | 22
Fair Value |  |
Less Than 12 Months | $ 865 | $ 78,873
12 Months or More | 74,407 | 47,100
Total | 75,272 | 125,973
Unrealized Losses |  |
Less Than 12 Months | 4 | 2,432
12 Months or More | 2,090 | 2,172
Total | $ 2,094 | $ 4,604

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