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Securities, Unrealized Loss Position (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2023 | Dec. 31, 2022
Debt Securities Available-for-Sale, Unrealized Loss Position [Abstract] |  |
Less than 12 months, fair value | $ 20,892 | $ 235,668
More than 12 months, fair value | 294,176 | 87,969
Total, fair value | 315,068 | 323,637
Less than 12 months, unrealized losses | (542) | (11,785)
More than 12 months, unrealized losses | (26,645) | (12,832)
Total, unrealized losses | (27,187) | (24,617)
Debt Securities Available-for-Sale [Abstract] |  |
Securities in nonaccrual status | 0 | 0
Securities purchased with deterioration in credit quality | 0 | 0
Collateral dependent securities | 0 | 0
Federal Agency Mortgage-backed Securities [Member] |  |
Debt Securities Available-for-Sale, Unrealized Loss Position [Abstract] |  |
Less than 12 months, fair value | 49 | 38,380
More than 12 months, fair value | 64,898 | 35,526
Total, fair value | 64,947 | 73,906
Less than 12 months, unrealized losses | 0 | (4,807)
More than 12 months, unrealized losses | (13,006) | (5,981)
Total, unrealized losses | (13,006) | (10,788)
Federal Agency Collateralized Mortgage Obligations (CMO) [Member] |  |
Debt Securities Available-for-Sale, Unrealized Loss Position [Abstract] |  |
Less than 12 months, fair value | 768 | 20,997
More than 12 months, fair value | 22,528 | 5,103
Total, fair value | 23,296 | 26,100
Less than 12 months, unrealized losses | (4) | (885)
More than 12 months, unrealized losses | (2,042) | (791)
Total, unrealized losses | (2,046) | (1,676)
Federal Agency Debt [Member] |  |
Debt Securities Available-for-Sale, Unrealized Loss Position [Abstract] |  |
Less than 12 months, fair value | 5,520 | 26,383
More than 12 months, fair value | 46,054 | 21,956
Total, fair value | 51,574 | 48,339
Less than 12 months, unrealized losses | (72) | (1,529)
More than 12 months, unrealized losses | (4,193) | (2,759)
Total, unrealized losses | (4,265) | (4,288)
Municipal Bonds [Member] |  |
Debt Securities Available-for-Sale, Unrealized Loss Position [Abstract] |  |
Less than 12 months, fair value | 0 | 2,176
More than 12 months, fair value | 4,170 | 2,021
Total, fair value | 4,170 | 4,197
Less than 12 months, unrealized losses | 0 | (315)
More than 12 months, unrealized losses | (672) | (354)
Total, unrealized losses | (672) | (669)
US Treasuries [Member] |  |
Debt Securities Available-for-Sale, Unrealized Loss Position [Abstract] |  |
Less than 12 months, fair value | 14,267 | 143,989
More than 12 months, fair value | 147,383 | 16,600
Total, fair value | 161,650 | 160,589
Less than 12 months, unrealized losses | (465) | (3,884)
More than 12 months, unrealized losses | (4,671) | (1,524)
Total, unrealized losses | (5,136) | (5,408)
SBA Pools [Member] |  |
Debt Securities Available-for-Sale, Unrealized Loss Position [Abstract] |  |
Less than 12 months, fair value | 288 | 3,743
More than 12 months, fair value | 9,143 | 6,763
Total, fair value | 9,431 | 10,506
Less than 12 months, unrealized losses | (1) | (365)
More than 12 months, unrealized losses | (2,061) | (1,423)
Total, unrealized losses | $ (2,062) | $ (1,788)

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