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Debt Securities - Additional Information (Details) $ in Thousands | Sep. 30, 2022 USD ($) security | Dec. 31, 2021 USD ($) security
--- | --- | ---
Available for Sale |  |
Debt securities with gross unrealized losses, fair value | $ | $ 2,532,546 | $ 2,783,177
Gross unrealized losses on debt securities | $ | $ 328,867 | $ 54,654
Ratio of gross unrealized losses to debt securities with gross unrealized losses | 13.00% | 2.00%
Count of debt securities | security | 1,145 | 1,252
Count of debt securities in an unrealized loss position | security | 1,109 | 373
Held to Maturity |  |
Debt securities with gross unrealized losses, fair value | $ | $ 808,885 | $ 0
Gross unrealized losses on debt securities | $ | $ 127,443 | $ 0
Ratio of gross unrealized losses to debt securities with gross unrealized losses | 15.80% | 0.00%
Count of debt securities | security | 55 | 0
Count of debt securities in an unrealized loss position | security | 55 | 0
Total |  |
Debt securities with gross unrealized losses, fair value | $ | $ 3,341,431 | $ 2,783,177
Gross unrealized losses on debt securities | $ | $ 456,310 | $ 54,654
Ratio of gross unrealized losses to debt securities with gross unrealized losses | 13.70% | 2.00%
Count of debt securities | security | 1,200 | 1,252
Count of debt securities in an unrealized loss position | security | 1,164 | 373

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