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v3.22.2.2

Investments - Narrative (Details) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021 | Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Debt Securities, Available-for-sale, Amortized Cost | $ 1,692,587,000 |  | $ 1,692,587,000 |  | $ 1,358,960,000
Cumulative net unamortized unrealized gain | $ 28,000 |  | $ 28,000 |  | $ 15,247,000
Maximum percentage of shareholders' equity security holdings held of one issuer | 10.00% |  | 10.00% |  | 10.00%
Securities pledged | $ 596,100,000 |  | $ 596,100,000 |  | $ 752,700,000
Mortgage-backed securities, weighted average life |  |  | 5 years |  |
Allowance for credit losses on available-for-sale securities | 0 |  | $ 0 |  | 0
Accrued interest receivable, held-to-maturity securities | 5,200,000 |  | 5,200,000 |  | 3,400,000
Allowance for credit losses on held-to-maturity debt securities | (689,000) |  | (689,000) |  | (614,000)
Sale of debt securities, available-for-sale | 0 | $ 27,100,000 | 0 | $ 27,135,000 |
Other investments, at cost | 58,637,000 |  | 58,637,000 |  | 59,896,000
Reclassified to Held to Maturity |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Debt Securities, Available-for-sale, Amortized Cost | 116,900,000 |  | 116,900,000 |  |
Cumulative net unamortized unrealized gain | 18,500,000 |  | 18,500,000 |  | 21,000,000
Des Moines |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Other investments, at cost | $ 10,000,000 |  | $ 10,000,000 |  | $ 12,100,000

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