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Debt Securities, Available-for-sale, Unrealized Loss Position, Average Credit Support

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Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions, Percentage Of Total

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Debt Securities, Held-To-Maturity, Interest Receivable

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Equity Securities Without Readily Determinable Fair Value, Shares

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The price per share of the conversion feature embedded in the debt instrument.

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Amount 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 of realized gain 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 of realized 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 of investment in debt security 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.

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Amount of accumulated unrealized loss on investment in debt security 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 allowance for credit loss for debt security measured at amortized cost (held-to-maturity).

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Amount of investment in debt security, measured at amortized cost, transferred to investment in debt security, measured at fair value, with change in fair value recognized in other comprehensive income (available-for-sale) and net income (trading).

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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).

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Amount of Federal Home Loan Bank (FHLB) and Federal Reserve Bank stock.

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Amount of realized and unrealized gain (loss) on investment.

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Amount of unrealized gain (loss) from transfer of investment in debt security measured at amortized cost (held-to-maturity), to investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) and investment in debt security measured at fair value with change in fair value recognized in net income (trading).

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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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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Fair value of financial instrument held by the entity for its own account (proprietary securities) for trading or investment purposes that are carried at fair value and pledged to counterparties as collateral for financing transactions.

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Number of shares issued during the period as a result of the conversion of convertible securities.

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Securities - Narrative (Details) - USD ($)	3 Months Ended
Securities - Narrative (Details) - USD ($)	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Proceeds from sale of debt securities available-for-sale	$ 0	$ 27,765,000
Gross gains from sale of securities	100,000
Gross losses from sale of securities	200,000
Gain (loss) on investment in shares of mutual funds	(114,000)	19,000
Securities transferred from available for sale to held to maturity	210,800,000
Securities transferred from available for sale to held to maturity, unrealized gains	800,000
Unrealized losses on mortgage backed securities of government sponsored entities	7,250,000		$ 2,098,000
Fair value of securities in unrealized loss position	499,225,000		405,437,000
Held-to-maturity securities, allowance for credit loss	0
Federal Home Loan Bank and Federal Reserve stock recorded in other assets	31,200,000
Accrued interest receivable on AFS debt securities	2,600,000		3,200,000
Accrued interest receivable on HTM debt securities	$ 800,000		400,000
Visa \| Common Class B
Debt Securities, Available-for-sale [Line Items]
Shares of Visa stock held (in shares)	11,330
Visa \| Common Class A
Debt Securities, Available-for-sale [Line Items]
Conversion rate of Class A stock for each share of Class B stock (in dollars per share)	$ 1.6228
Shares issued (in shares)	18,386
CRA - Qualified Mutual Fund
Debt Securities, Available-for-sale [Line Items]
Gain (loss) on investment in shares of mutual funds	$ (100,000)	$ 100,000
Investment in mutual fund carried at fair value	6,400,000
Public Deposits and Secured Borrowings \| Carrying Value
Debt Securities, Available-for-sale [Line Items]
Fair value of debt securities pledged as collateral	350,500,000
Private mortgage-backed securities and collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Unrealized losses on mortgage backed securities of government sponsored entities	261,000		210,000
Fair value of securities in unrealized loss position	20,781,000		23,997,000
Allowance for credit losses on AFS debt securities	$ 0
Average credit support percentage	31.00%
Mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities
Debt Securities, Available-for-sale [Line Items]
Unrealized losses on mortgage backed securities of government sponsored entities	$ 6,774,000		1,240,000
Fair value of securities in unrealized loss position	319,739,000		203,974,000
Allowance for credit losses on AFS debt securities	0
Collateralized loan obligations
Debt Securities, Available-for-sale [Line Items]
Unrealized losses on mortgage backed securities of government sponsored entities	160,000		647,000
Fair value of securities in unrealized loss position	153,470,000		$ 177,210,000
Allowance for credit losses on AFS debt securities	$ 0
Standard & Poor's, AAA Rating \| Collateralized loan obligations
Debt Securities, Available-for-sale [Line Items]
Number of positions held, percentage of total	27.00%
Standard & Poor's, AA Rating \| Collateralized loan obligations
Debt Securities, Available-for-sale [Line Items]
Number of positions held, percentage of total	24.00%