Investment Securities - Additional Information (Details)	12 Months Ended
Dec. 31, 2021 USD ($) security	Dec. 31, 2020 USD ($) security	Dec. 31, 2019 USD ($)
Investments, Debt and Equity Securities [Abstract]
Equity securities	$ 36,473,000	$ 29,378,000
Trading debt securities	$ 38,130,000	$ 0
Number of security positions in the debt securities available for sale portfolio in an unrealized loss position \| security	139	58
Fair value of debt securities available for sale pledged as collateral	$ 568,700,000
Weighted-average remaining expected life of residential mortgage-backed securities available for sale, years	5 years
Impairment loss	$ 0	$ 0
Allowance for credit losses for available for sale debt securities	$ 0	$ 0
Number of security positions in the securities held to maturity portfolio in an unrealized loss position \| security	108	13
Fair value of investments held to maturity pledged as collateral	$ 1,200,000,000
Weighted-average remaining expected life of residential mortgage-backed securities held to maturity, years	6 years 1 month 6 days
Charge-offs of debt securities	$ 0	$ 0
Sales of investment securities available for sale	$ 91,978,000	$ 30,020,000	$ 271,901,000

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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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 investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current.

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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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