Investment Securities - Additional Information (Details)	3 Months Ended
Mar. 31, 2022 USD ($) position	Mar. 31, 2021 USD ($)	Dec. 31, 2021 USD ($) position
Investments, Debt and Equity Securities [Abstract]
Equity securities	$ 35,992,000		$ 36,473,000
Trading debt securities	11,739,000		$ 38,130,000
Net trading gains (losses) on trading securities	$ (1,100,000)	$ 219,000
Number of security positions in the debt securities available for sale portfolio in an unrealized loss position \| position	404		139
Fair value of debt securities available for sale pledged as collateral	$ 488,500,000
Weighted-average remaining expected life of residential mortgage-backed securities available for sale, years	5 years
Impairment loss	$ 0	0
Available for sale debt securities, allowance for credit losses	$ 0		$ 0
Number of security positions in the securities held to maturity portfolio in an unrealized loss position \| position	303		108
Fair value of investments held to maturity pledged as collateral	$ 909,700,000
Weighted-average remaining expected life of residential mortgage-backed securities held to maturity, years	7 years 10 months 24 days
Held to maturity debt securities, allowance for credit losses	$ 1,200,000		$ 1,200,000
Held to maturity debt securities, (credit) provision for credit losses	$ 57,000	$ (358,000)

Amount excluding accrued interest, of allowance for credit loss on 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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