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Investment Securities - Unrealized Losses on Investment Securities Available for Sale (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Investment Securities, Available for Sale, Fair Value |  |
Less than 12 Months | $ 13,050 | $ 46,696
12 Months or Longer | 619,641 | 902,899
Fair Value | 632,691 | 949,595
Investment Securities, Available-for-Sale, Unrealized Loss |  |
Less than 12 Months | (113) | (288)
12 Months or Longer | (59,078) | (95,932)
Unrealized Losses | (59,191) | (96,220)
U.S. government and agency securities |  |
Investment Securities, Available for Sale, Fair Value |  |
Less than 12 Months | 0 | 0
12 Months or Longer | 13,054 | 13,750
Fair Value | 13,054 | 13,750
Investment Securities, Available-for-Sale, Unrealized Loss |  |
Less than 12 Months | 0 | 0
12 Months or Longer | (1,885) | (2,297)
Unrealized Losses | (1,885) | (2,297)
Municipal securities |  |
Investment Securities, Available for Sale, Fair Value |  |
Less than 12 Months | 0 | 3,548
12 Months or Longer | 56,744 | 71,458
Fair Value | 56,744 | 75,006
Investment Securities, Available-for-Sale, Unrealized Loss |  |
Less than 12 Months | 0 | (18)
12 Months or Longer | (8,956) | (12,697)
Unrealized Losses | (8,956) | (12,715)
Residential CMO and MBS(1) |  |
Investment Securities, Available for Sale, Fair Value |  |
Less than 12 Months | 3,150 | 0
12 Months or Longer | 261,630 | 358,316
Fair Value | 264,780 | 358,316
Investment Securities, Available-for-Sale, Unrealized Loss |  |
Less than 12 Months | (5) | 0
12 Months or Longer | (31,140) | (46,125)
Unrealized Losses | (31,145) | (46,125)
Commercial CMO and MBS(1) |  |
Investment Securities, Available for Sale, Fair Value |  |
Less than 12 Months | 4,419 | 37,899
12 Months or Longer | 284,072 | 448,197
Fair Value | 288,491 | 486,096
Investment Securities, Available-for-Sale, Unrealized Loss |  |
Less than 12 Months | (54) | (228)
12 Months or Longer | (17,041) | (34,512)
Unrealized Losses | (17,095) | (34,740)
Corporate obligations |  |
Investment Securities, Available for Sale, Fair Value |  |
Less than 12 Months | 3,864 | 911
12 Months or Longer | 3,945 | 3,887
Fair Value | 7,809 | 4,798
Investment Securities, Available-for-Sale, Unrealized Loss |  |
Less than 12 Months | (47) | (20)
12 Months or Longer | (55) | (114)
Unrealized Losses | (102) | (134)
Other asset-backed securities |  |
Investment Securities, Available for Sale, Fair Value |  |
Less than 12 Months | 1,617 | 4,338
12 Months or Longer | 196 | 7,291
Fair Value | 1,813 | 11,629
Investment Securities, Available-for-Sale, Unrealized Loss |  |
Less than 12 Months | (7) | (22)
12 Months or Longer | (1) | (187)
Unrealized Losses | $ (8) | $ (209)

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