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Securities - Additional Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($)	Mar. 31, 2022 USD ($) Security	Dec. 31, 2021 USD ($)
Schedule Of Investments [Line Items]
Trading securities		$ 0
Net gains reclassified from accumulated other comprehensive income earnings	$ 1,500
Investment securities posted as collateral		$ 463,600	$ 332,300
Minimum
Schedule Of Investments [Line Items]
Percentage of shareholders equity for which securities holdings exceeds for no issuer other than U.S. Government and agencies		10.00%	10.00%
Federal Home Loan Bank Advances
Schedule Of Investments [Line Items]
Carrying amount of securities pledged as collateral		$ 0	$ 0
Public Fund Deposits
Schedule Of Investments [Line Items]
Carrying amount of securities pledged as collateral		402,000	277,100
Customer Repurchase Agreements
Schedule Of Investments [Line Items]
Carrying amount of securities pledged as collateral		$ 39,000	$ 38,800
Available-for-sale Securities
Schedule Of Investments [Line Items]
Investment securities with unrealized losses | Security		223
Held-to-maturity Securities
Schedule Of Investments [Line Items]
Investment securities with unrealized losses | Security		0

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Amount after tax of reclassification adjustment from accumulated other comprehensive income for unrealized gain (loss) realized upon the sale of available-for-sale securities.

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Amount of investment in debt security measured at fair value with change in fair value recognized in net income (trading) and investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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