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v3.23.1

Securities - Fair Value and Age of Gross Unrealized Losses of Debt Securities (Details) $ in Thousands | Mar. 31, 2023 USD ($) security | Dec. 31, 2022 USD ($) security
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Debt Securities, Available-for-sale [Line Items] |  |
Number of Securities, Less Than 12 Months | security | 33 | 116
Fair Value, Less Than 12 Months | $ 232,123 | $ 663,656
Unrealized Losses, Less Than 12 Months | $ (6,273) | $ (46,120)
Number of Securities, 12 Months or More | security | 94 | 31
Fair Value, 12 Months or More | $ 694,891 | $ 308,067
Unrealized Losses, 12 Months or More | $ (82,675) | $ (56,462)
Number of Securities, Total | security | 127 | 147
Fair Value, Total | $ 927,014 | $ 971,723
Unrealized Losses, Total | $ (88,948) | $ (102,582)
U.S. Treasury securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Number of Securities, Less Than 12 Months | security | 1 | 6
Fair Value, Less Than 12 Months | $ 9,413 | $ 57,057
Unrealized Losses, Less Than 12 Months | $ (112) | $ (3,363)
Number of Securities, 12 Months or More | security | 12 | 8
Fair Value, 12 Months or More | $ 114,151 | $ 74,638
Unrealized Losses, 12 Months or More | $ (11,342) | $ (10,358)
Number of Securities, Total | security | 13 | 14
Fair Value, Total | $ 123,564 | $ 131,695
Unrealized Losses, Total | $ (11,454) | $ (13,721)
Obligations of U.S. government corporations and agencies |  |
Debt Securities, Available-for-sale [Line Items] |  |
Number of Securities, Less Than 12 Months | security | 4 | 6
Fair Value, Less Than 12 Months | $ 27,382 | $ 41,811
Unrealized Losses, Less Than 12 Months | $ (618) | $ (1,668)
Number of Securities, 12 Months or More | security | 2 | 0
Fair Value, 12 Months or More | $ 14,713 | $ 0
Unrealized Losses, 12 Months or More | $ (732) | $ 0
Number of Securities, Total | security | 6 | 6
Fair Value, Total | $ 42,095 | $ 41,811
Unrealized Losses, Total | $ (1,350) | $ (1,668)
Collateralized mortgage obligations of U.S. government corporations and agencies |  |
Debt Securities, Available-for-sale [Line Items] |  |
Number of Securities, Less Than 12 Months | security | 16 | 47
Fair Value, Less Than 12 Months | $ 130,667 | $ 296,509
Unrealized Losses, Less Than 12 Months | $ (3,867) | $ (28,153)
Number of Securities, 12 Months or More | security | 43 | 13
Fair Value, 12 Months or More | $ 283,266 | $ 112,902
Unrealized Losses, 12 Months or More | $ (43,507) | $ (25,682)
Number of Securities, Total | security | 59 | 60
Fair Value, Total | $ 413,933 | $ 409,411
Unrealized Losses, Total | $ (47,374) | $ (53,835)
Residential mortgage-backed securities of U.S. government corporations and agencies |  |
Debt Securities, Available-for-sale [Line Items] |  |
Number of Securities, Less Than 12 Months | security | 3 | 25
Fair Value, Less Than 12 Months | $ 1,487 | $ 7,143
Unrealized Losses, Less Than 12 Months | $ (69) | $ (589)
Number of Securities, 12 Months or More | security | 12 | 3
Fair Value, 12 Months or More | $ 39,280 | $ 34,223
Unrealized Losses, 12 Months or More | $ (7,039) | $ (7,245)
Number of Securities, Total | security | 15 | 28
Fair Value, Total | $ 40,767 | $ 41,366
Unrealized Losses, Total | $ (7,108) | $ (7,834)
Commercial mortgage-backed securities of U.S. government corporations and agencies |  |
Debt Securities, Available-for-sale [Line Items] |  |
Number of Securities, Less Than 12 Months | security | 9 | 30
Fair Value, Less Than 12 Months | $ 63,174 | $ 241,009
Unrealized Losses, Less Than 12 Months | $ (1,607) | $ (11,975)
Number of Securities, 12 Months or More | security | 25 | 7
Fair Value, 12 Months or More | $ 243,481 | $ 86,304
Unrealized Losses, 12 Months or More | $ (20,055) | $ (13,177)
Number of Securities, Total | security | 34 | 37
Fair Value, Total | $ 306,655 | $ 327,313
Unrealized Losses, Total | $ (21,662) | $ (25,152)
Obligations of states and political subdivisions |  |
Debt Securities, Available-for-sale [Line Items] |  |
Number of Securities, Less Than 12 Months | security | 0 | 2
Fair Value, Less Than 12 Months | $ 0 | $ 20,127
Unrealized Losses, Less Than 12 Months | $ 0 | $ (372)
Number of Securities, 12 Months or More | security | 0 | 0
Fair Value, 12 Months or More | $ 0 | $ 0
Unrealized Losses, 12 Months or More | $ 0 | $ 0
Number of Securities, Total | security | 0 | 2
Fair Value, Total | $ 0 | $ 20,127
Unrealized Losses, Total | $ 0 | $ (372)

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