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v3.23.3

Securities, Available for Sale (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Dec. 31, 2022
Debt securities, available-for-sale [Abstract] |  |  |  |  |
Amortized cost | $ 1,641,356 |  | $ 1,641,356 |  | $ 1,743,882
Unrealized gains | 8 |  | 8 |  | 38
Unrealized losses | (242,332) |  | (242,332) |  | (216,695)
Estimated fair value | 1,399,032 |  | 1,399,032 |  | 1,527,225
Allowance for credit losses on AFS securities | 0 |  | 0 |  | 0
Gross realized gains | 0 | $ 0 |  | $ 0 |
Gross realized losses | 0 | $ 0 | 4,500 | $ 0 |
U.S. Treasury [Member] |  |  |  |  |
Debt securities, available-for-sale [Abstract] |  |  |  |  |
Amortized cost | 133,160 |  | 133,160 |  | 132,891
Unrealized gains | 0 |  | 0 |  | 0
Unrealized losses | (11,565) |  | (11,565) |  | (11,233)
Estimated fair value | 121,595 |  | 121,595 |  | 121,658
Federal Agency [Member] |  |  |  |  |
Debt securities, available-for-sale [Abstract] |  |  |  |  |
Amortized cost | 248,392 |  | 248,392 |  | 248,419
Unrealized gains | 0 |  | 0 |  | 0
Unrealized losses | (44,636) |  | (44,636) |  | (42,000)
Estimated fair value | 203,756 |  | 203,756 |  | 206,419
State & Municipal [Member] |  |  |  |  |
Debt securities, available-for-sale [Abstract] |  |  |  |  |
Amortized cost | 96,449 |  | 96,449 |  | 97,036
Unrealized gains | 0 |  | 0 |  | 5
Unrealized losses | (13,164) |  | (13,164) |  | (14,190)
Estimated fair value | 83,285 |  | 83,285 |  | 82,851
Mortgage-Backed, Government Sponsored Enterprises [Member] |  |  |  |  |
Debt securities, available-for-sale [Abstract] |  |  |  |  |
Amortized cost | 412,257 |  | 412,257 |  | 454,177
Unrealized gains | 0 |  | 0 |  | 9
Unrealized losses | (61,231) |  | (61,231) |  | (54,675)
Estimated fair value | 351,026 |  | 351,026 |  | 399,511
Mortgage-Backed, U.S. Government Agency Securities [Member] |  |  |  |  |
Debt securities, available-for-sale [Abstract] |  |  |  |  |
Amortized cost | 74,812 |  | 74,812 |  | 81,844
Unrealized gains | 6 |  | 6 |  | 15
Unrealized losses | (10,076) |  | (10,076) |  | (7,676)
Estimated fair value | 64,742 |  | 64,742 |  | 74,183
Collateralized Mortgage Obligations, Government-Sponsored Enterprises [Member] |  |  |  |  |
Debt securities, available-for-sale [Abstract] |  |  |  |  |
Amortized cost | 463,436 |  | 463,436 |  | 498,021
Unrealized gains | 2 |  | 2 |  | 9
Unrealized losses | (63,389) |  | (63,389) |  | (59,473)
Estimated fair value | 400,049 |  | 400,049 |  | 438,557
Collateralized Mortgage Obligations, U.S. Government Agency Securities [Member] |  |  |  |  |
Debt securities, available-for-sale [Abstract] |  |  |  |  |
Amortized cost | 164,418 |  | 164,418 |  | 171,090
Unrealized gains | 0 |  | 0 |  | 0
Unrealized losses | (31,056) |  | (31,056) |  | (21,284)
Estimated fair value | 133,362 |  | 133,362 |  | 149,806
Corporate [Member] |  |  |  |  |
Debt securities, available-for-sale [Abstract] |  |  |  |  |
Amortized cost | 48,432 |  | 48,432 |  | 60,404
Unrealized gains | 0 |  | 0 |  | 0
Unrealized losses | (7,215) |  | (7,215) |  | (6,164)
Estimated fair value | $ 41,217 |  | 41,217 |  | $ 54,240
Loss on the write-off of an AFS debt security |  |  | $ 5,000 |  |

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