Investment Securities - Additional Information (Details) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2023 USD ($) security	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) security	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($) security	Dec. 31, 2021 USD ($)
Proceeds from Sale and Maturity of Debt Securities, Available-for-Sale
Available-for-sale securities sold at par value	$ 161,200		$ 173,200
Debt Securities, Available-for-Sale, Realized Gain (Loss)
Proceeds from sale of available-for-sale securities		$ 0	156,011	$ 0
Debt securities, available-for-sale, realized gain (loss)	$ (17,100)	0	$ (17,300)	0
Number of securities in unrealized loss position \| security	158		158		98
Allowance for loan losses	$ 0	$ 20,032	$ 0	$ 20,032	$ 20,208	$ 20,032

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with interest rate reset through auction process, sold at par value.

+ References

No definition available.

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Amount of realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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Amount of cash inflow from sale of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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