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Securities - Amortized Cost and Fair Value, Held to Maturity (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | $ 1,324,072 | $ 416,389
Gross Unrealized Gains | 17 | 334
Gross Unrealized Losses | (117,549) | (1,171)
Fair Value | 1,206,540 | 415,552
Allowance for credit losses - held to maturity securities | (32) | (32)
Held-to-maturity securities, net of allowance for credit losses | 1,324,040 | 416,357
Obligations of states and political subdivisions |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 291,886 | 267,641
Gross Unrealized Gains | 17 | 333
Gross Unrealized Losses | (48,325) | (685)
Fair Value | 243,578 | 267,289
Residential mortgage backed securities: |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 423,315 | 24,832
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (30,706) | (92)
Fair Value | 392,609 | 24,740
Other debt securities |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 62,875 | 22,049
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (4,266) | (79)
Fair Value | 58,609 | 21,970
Government agency mortgage backed securities | Residential mortgage backed securities: |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 483,560 | 60,507
Gross Unrealized Gains | 0 | 1
Gross Unrealized Losses | (24,432) | (198)
Fair Value | 459,128 | 60,310
Government agency mortgage backed securities | Commercial mortgage backed securities: |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 17,006 | 1,855
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (3,261) | 0
Fair Value | 13,745 | 1,855
Government agency collateralized mortgage obligations | Commercial mortgage backed securities: |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 45,430 | 39,505
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (6,559) | (117)
Fair Value | $ 38,871 | $ 39,388

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