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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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Stock Issued During Period, Conversion Ratio, Equity Interests Issued and Issuable, Entity Shares Issued For Each Acquiree Share

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

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Amount, after allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity) 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), classified as current.

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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 ($) $ in Thousands	3 Months Ended			9 Months Ended
Securities - Narrative (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Proceeds from sale of debt securities available-for-sale	$ 1,000		$ 4,400	$ 57,209	$ 96,733
Gross gains from sale of securities	0		4	200	2,400
Gross losses from sale of securities	0		0	300	1,300
Gain (loss) on investment in shares of mutual funds	(30)		4	(199)	1,253
Securities transferred from available for sale to held to maturity		$ 210,800
Securities transferred from available for sale to held to maturity, unrealized gains		$ 800
Unrealized losses on mortgage backed securities of government sponsored entities	9,850			9,850		$ 2,098
Fair value of securities in unrealized loss position	770,488			770,488		405,437
Held-to-maturity securities, allowance for credit loss	0			0
Federal Home Loan Bank and Federal Reserve stock recorded in other assets	31,500			31,500
Accrued interest receivable on AFS debt securities	3,700			3,700		3,200
Accrued interest receivable on HTM debt securities	$ 800			$ 800		400
Common Class B \| Visa
Debt Securities, Available-for-sale [Line Items]
Shares of Visa stock held (in shares)	11,330			11,330
Common Class A \| Visa
Debt Securities, Available-for-sale [Line Items]
Conversion rate of Class A stock for each share of Class B stock (in shares)	1.6228			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	$ (30)		$ 100	$ (100)	$ 200
Investment in mutual fund carried at fair value	9,400			9,400
Public Deposits and Secured Borrowings \| Carrying Value
Debt Securities, Available-for-sale [Line Items]
Fair value of debt securities pledged as collateral	385,500			385,500
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	9,450			9,450		1,240
Fair value of securities in unrealized loss position	675,378			675,378		203,974
Allowance for credit losses on AFS debt securities	0			0
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	236			236		210
Fair value of securities in unrealized loss position	15,728			15,728		23,997
Allowance for credit losses on AFS debt securities	$ 0			$ 0
Average credit support percentage	35.00%			35.00%
Collateralized loan obligations
Debt Securities, Available-for-sale [Line Items]
Unrealized losses on mortgage backed securities of government sponsored entities	$ 105			$ 105		647
Fair value of securities in unrealized loss position	73,691			73,691		$ 177,210
Allowance for credit losses on AFS debt securities	$ 0			$ 0
Collateralized loan obligations \| Standard & Poor's, AAA Rating
Debt Securities, Available-for-sale [Line Items]
Number of positions held, percentage of total	37.00%			37.00%
Collateralized loan obligations \| Standard & Poor's, AA Rating
Debt Securities, Available-for-sale [Line Items]
Number of positions held, percentage of total	24.00%			24.00%