Consolidated Balance Sheets (Parenthetical) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Investment securities, available for sale, allowance	$ 83,000	$ 2,000
Investment securities held to maturity, fair value	815,211,000	93,868,000
Investment securities held to maturity, allowance	$ 181,000	$ 0
Common stock, par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	50,737,400	50,610,681
Common stock, shares outstanding (in shares)	50,606,365	50,479,646
Treasury stock (in shares)	131,035	131,035

Face amount per share of no-par value common stock.

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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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Amount, excluding accrued interest, of allowance for credit loss on investment in debt security measured at amortized cost (held-to-maturity).

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Fair value of investment in debt security measured at amortized cost (held-to-maturity).

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Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

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