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Securities - Gross Unrealized Losses and Fair Value by Investment Category (Details) $ in Thousands | Jun. 30, 2024 USD ($) security | Dec. 31, 2023 USD ($) security
--- | --- | ---
Available for Sale: |  |
Number of positions, Less than 12 Months | security | 7 | 6
Fair Value, Less than 12 Months | $ 17,125 | $ 6,819
Unrealized Losses, Less than 12 Months | $ (240) | $ (222)
Number of positions, 12 Months or More | security | 127 | 127
Fair value, 12 Months or More | $ 647,383 | $ 685,774
Unrealized Losses, 12 Months or More | $ (145,413) | $ (139,572)
Number of positions | security | 134 | 133
Fair Value | $ 664,508 | $ 692,593
Unrealized Losses | $ (145,653) | $ (139,794)
Held to Maturity: |  |
Number of positions, Less than 12 Months | security | 1 | 2
Fair Value, Less than 12 Months | $ 2,351 | $ 2,807
Unrealized Losses, Less than 12 Months | $ (33) | $ (25)
Number of positions, 12 Months or More | security | 235 | 234
Fair Value, 12 Months or More | $ 1,048,672 | $ 1,117,285
Unrealized Losses, 12 Months or More | $ (121,978) | $ (99,715)
Number of positions | security | 236 | 236
Fair Value | $ 1,051,023 | $ 1,120,092
Unrealized Losses | $ (122,011) | $ (99,740)
Obligations of states and political subdivisions |  |
Available for Sale: |  |
Number of positions, Less than 12 Months | security | 0 | 3
Fair Value, Less than 12 Months | $ 0 | $ 2,914
Unrealized Losses, Less than 12 Months | $ 0 | $ (2)
Number of positions, 12 Months or More | security | 7 | 9
Fair value, 12 Months or More | $ 12,928 | $ 15,198
Unrealized Losses, 12 Months or More | $ (2,273) | $ (1,881)
Number of positions | security | 7 | 12
Fair Value | $ 12,928 | $ 18,112
Unrealized Losses | $ (2,273) | $ (1,883)
Held to Maturity: |  |
Number of positions, Less than 12 Months | security | 1 | 2
Fair Value, Less than 12 Months | $ 2,351 | $ 2,807
Unrealized Losses, Less than 12 Months | $ (33) | $ (25)
Number of positions, 12 Months or More | security | 127 | 126
Fair Value, 12 Months or More | $ 241,015 | $ 249,995
Unrealized Losses, 12 Months or More | $ (41,293) | $ (33,663)
Number of positions | security | 128 | 128
Fair Value | $ 243,366 | $ 252,802
Unrealized Losses | $ (41,326) | $ (33,688)
Other debt securities |  |
Available for Sale: |  |
Number of positions, Less than 12 Months | security | 0 | 2
Fair Value, Less than 12 Months | $ 0 | $ 3,099
Unrealized Losses, Less than 12 Months | $ 0 | $ (195)
Number of positions, 12 Months or More | security | 20 | 19
Fair value, 12 Months or More | $ 37,415 | $ 35,072
Unrealized Losses, 12 Months or More | $ (3,791) | $ (4,263)
Number of positions | security | 20 | 21
Fair Value | $ 37,415 | $ 38,171
Unrealized Losses | $ (3,791) | $ (4,458)
Held to Maturity: |  |
Number of positions, Less than 12 Months | security | 0 | 0
Fair Value, Less than 12 Months | $ 0 | $ 0
Unrealized Losses, Less than 12 Months | $ 0 | $ 0
Number of positions, 12 Months or More | security | 10 | 10
Fair Value, 12 Months or More | $ 51,418 | $ 54,254
Unrealized Losses, 12 Months or More | $ (4,707) | $ (4,119)
Number of positions | security | 10 | 10
Fair Value | $ 51,418 | $ 54,254
Unrealized Losses | $ (4,707) | $ (4,119)
Government agency mortgage backed securities | Residential mortgage backed securities: |  |
Available for Sale: |  |
Number of positions, Less than 12 Months | security | 5 | 1
Fair Value, Less than 12 Months | $ 9,495 | $ 806
Unrealized Losses, Less than 12 Months | $ (109) | $ (25)
Number of positions, 12 Months or More | security | 36 | 35
Fair value, 12 Months or More | $ 154,193 | $ 166,963
Unrealized Losses, 12 Months or More | $ (26,271) | $ (24,943)
Number of positions | security | 41 | 36
Fair Value | $ 163,688 | $ 167,769
Unrealized Losses | $ (26,380) | $ (24,968)
Held to Maturity: |  |
Number of positions, Less than 12 Months | security | 0 | 0
Fair Value, Less than 12 Months | $ 0 | $ 0
Unrealized Losses, Less than 12 Months | $ 0 | $ 0
Number of positions, 12 Months or More | security | 70 | 70
Fair Value, 12 Months or More | $ 372,441 | $ 405,950
Unrealized Losses, 12 Months or More | $ (27,382) | $ (20,314)
Number of positions | security | 70 | 70
Fair Value | $ 372,441 | $ 405,950
Unrealized Losses | $ (27,382) | $ (20,314)
Government agency mortgage backed securities | Commercial mortgage backed securities: |  |
Available for Sale: |  |
Number of positions, Less than 12 Months | security | 0 | 0
Fair Value, Less than 12 Months | $ 0 | $ 0
Unrealized Losses, Less than 12 Months | $ 0 | $ 0
Number of positions, 12 Months or More | security | 2 | 2
Fair value, 12 Months or More | $ 5,335 | $ 5,392
Unrealized Losses, 12 Months or More | $ (681) | $ (637)
Number of positions | security | 2 | 2
Fair Value | $ 5,335 | $ 5,392
Unrealized Losses | $ (681) | $ (637)
Held to Maturity: |  |
Number of positions, Less than 12 Months | security | 0 | 0
Fair Value, Less than 12 Months | $ 0 | $ 0
Unrealized Losses, Less than 12 Months | $ 0 | $ 0
Number of positions, 12 Months or More | security | 1 | 1
Fair Value, 12 Months or More | $ 13,914 | $ 14,011
Unrealized Losses, 12 Months or More | $ (3,058) | $ (2,972)
Number of positions | security | 1 | 1
Fair Value | $ 13,914 | $ 14,011
Unrealized Losses | $ (3,058) | $ (2,972)
Government agency collateralized mortgage obligations | Residential mortgage backed securities: |  |
Available for Sale: |  |
Number of positions, Less than 12 Months | security | 0 | 0
Fair Value, Less than 12 Months | $ 0 | $ 0
Unrealized Losses, Less than 12 Months | $ 0 | $ 0
Number of positions, 12 Months or More | security | 37 | 37
Fair value, 12 Months or More | $ 330,955 | $ 354,574
Unrealized Losses, 12 Months or More | $ (89,746) | $ (85,883)
Number of positions | security | 37 | 37
Fair Value | $ 330,955 | $ 354,574
Unrealized Losses | $ (89,746) | $ (85,883)
Held to Maturity: |  |
Number of positions, Less than 12 Months | security | 0 | 0
Fair Value, Less than 12 Months | $ 0 | $ 0
Unrealized Losses, Less than 12 Months | $ 0 | $ 0
Number of positions, 12 Months or More | security | 18 | 18
Fair Value, 12 Months or More | $ 333,214 | $ 355,538
Unrealized Losses, 12 Months or More | $ (38,017) | $ (31,670)
Number of positions | security | 18 | 18
Fair Value | $ 333,214 | $ 355,538
Unrealized Losses | $ (38,017) | $ (31,670)
Government agency collateralized mortgage obligations | Commercial mortgage backed securities: |  |
Available for Sale: |  |
Number of positions, Less than 12 Months | security | 2 | 0
Fair Value, Less than 12 Months | $ 7,630 | $ 0
Unrealized Losses, Less than 12 Months | $ (131) | $ 0
Number of positions, 12 Months or More | security | 25 | 25
Fair value, 12 Months or More | $ 106,557 | $ 108,575
Unrealized Losses, 12 Months or More | $ (22,651) | $ (21,965)
Number of positions | security | 27 | 25
Fair Value | $ 114,187 | $ 108,575
Unrealized Losses | $ (22,782) | $ (21,965)
Held to Maturity: |  |
Number of positions, Less than 12 Months | security | 0 | 0
Fair Value, Less than 12 Months | $ 0 | $ 0
Unrealized Losses, Less than 12 Months | $ 0 | $ 0
Number of positions, 12 Months or More | security | 9 | 9
Fair Value, 12 Months or More | $ 36,670 | $ 37,537
Unrealized Losses, 12 Months or More | $ (7,521) | $ (6,977)
Number of positions | security | 9 | 9
Fair Value | $ 36,670 | $ 37,537
Unrealized Losses | $ (7,521) | $ (6,977)

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