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Investment Securities Available-for-Sale - Additional Information (Details) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items] |  |  |
Federal Reserve and Federal Home Loan Bank stock | $ 34,033 |  | $ 40,104
Allowance for credit losses | $ (132) |  | (167)
Debt securities as percentage of total investment securities | 99.90% |  |
Debt securities weighted average duration | 4 years 3 months 18 days |  |
Gross realized gains on sales of investment securities | $ 726 | $ 1,500 |
Gross realized losses on sales of investment | 187 | 0 |
Proceeds from sale/call of available-for-sale securities | $ 52,022 | $ 119,988 |
Holdings of securities of any one issuer | 10.00% |  |
Other Assets |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Accrued interest on available for sale securities | $ 4,300 |  | 3,500
Collateral Pledged |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Debt securities, available-for-sale, restricted | $ 249,600 |  | $ 268,400

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