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Investment Securities - Available for Sale Securities Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Fair Value |  |
Less Than 12 Months | $ 31,139 | $ 183,951
12 Months or Greater | 366,095 | 246,349
Total | 397,234 | 430,300
Gross Unrealized Losses |  |
Less Than 12 Months | (2,346) | (13,575)
12 Months or Greater | (62,009) | (44,251)
Total | (64,355) | (57,826)
U.S. treasury securities |  |
Fair Value |  |
Less Than 12 Months | 0 | 1,377
12 Months or Greater | 791 | 245
Total | 791 | 1,622
Gross Unrealized Losses |  |
Less Than 12 Months | 0 | (17)
12 Months or Greater | (8) | (5)
Total | (8) | (22)
U.S. agency securities |  |
Fair Value |  |
Less Than 12 Months | 0 | 3,221
12 Months or Greater | 4,103 | 1,364
Total | 4,103 | 4,585
Gross Unrealized Losses |  |
Less Than 12 Months | 0 | (257)
12 Months or Greater | (510) | (193)
Total | (510) | (450)
Asset backed securities |  |
Fair Value |  |
Less Than 12 Months | 5,934 | 10,780
12 Months or Greater | 18,598 | 19,208
Total | 24,532 | 29,988
Gross Unrealized Losses |  |
Less Than 12 Months | (14) | (319)
12 Months or Greater | (397) | (1,161)
Total | (411) | (1,480)
State, county & municipal securities |  |
Fair Value |  |
Less Than 12 Months | 1,457 | 29,284
12 Months or Greater | 100,197 | 75,472
Total | 101,654 | 104,756
Gross Unrealized Losses |  |
Less Than 12 Months | (276) | (3,629)
12 Months or Greater | (22,952) | (17,734)
Total | (23,228) | (21,363)
Corporate debt securities |  |
Fair Value |  |
Less Than 12 Months | 7,660 | 17,258
12 Months or Greater | 39,369 | 30,651
Total | 47,029 | 47,909
Gross Unrealized Losses |  |
Less Than 12 Months | (1,632) | (1,463)
12 Months or Greater | (6,033) | (3,857)
Total | (7,665) | (5,320)
Mortgage-backed securities |  |
Fair Value |  |
Less Than 12 Months | 16,088 | 122,031
12 Months or Greater | 203,037 | 119,409
Total | 219,125 | 241,440
Gross Unrealized Losses |  |
Less Than 12 Months | (424) | (7,890)
12 Months or Greater | (32,109) | (21,301)
Total | $ (32,533) | $ (29,191)

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