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

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- Definition

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

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- Definition

Proceeds from Sale of Debt Securities, Available-for-sale, Including Legacy Securities

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Amount, after allowance for credit loss, of accrued interest 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 fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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- Definition

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

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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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- Definition

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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The aggregate fair value as of the balance sheet date of financial instruments and other positions owned by the entity including: (1) mortgages, mortgage-backed and asset backed securities; (2) US government and agency obligations; (3) state and municipal government obligations; (4) other sovereign government debt; (5) corporate obligations; (6) corporate equities; (7) principal investments; (8) derivative contracts; and (9) physical commodities. Includes both pledged and unpledged holdings.

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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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Securities - Narrative (Details) - USD ($)	3 Months Ended
Securities - Narrative (Details) - USD ($)	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Debt Securities, Available-for-sale [Line Items]
Proceeds from sale of available-for-sale debt securities, including legacy securities	$ 277,200,000	$ 0
Gross losses from sale of securities	39,500,000
Unrealized losses on mortgage backed securities of government sponsored entities	131,091,000		$ 150,385,000
Fair value of securities in unrealized loss position	3,223,588,000		2,040,898,000
Held-to-maturity securities, allowance for credit loss	0
Federal Home Loan Bank and Federal Reserve stock recorded in other assets	135,600,000		135,600,000
Accrued interest receivable on AFS debt securities	23,100,000		24,500,000
Accrued interest receivable on HTM debt securities	1,000,000.0		1,000,000.0
Asset Pledged as Collateral
Debt Securities, Available-for-sale [Line Items]
Fair value of debt securities pledged as collateral	1,900,000,000
CRA - Qualified Mutual Fund
Debt Securities, Available-for-sale [Line Items]
Gross losses from sale of securities	100,000
Gross gains from sale of securities		$ 200,000
Investment in mutual fund carried at fair value	13,800,000		13,900,000
U.S. Treasury securities and obligations of U.S. government agencies
Debt Securities, Available-for-sale [Line Items]
Unrealized losses on mortgage backed securities of government sponsored entities	775,000		451,000
Fair value of securities in unrealized loss position	48,580,000		35,778,000
Allowance for credit losses on AFS debt securities	0
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	115,100,000
Fair value of securities in unrealized loss position	2,200,000,000
Allowance for credit losses on AFS debt securities	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	4,978,000		5,010,000
Fair value of securities in unrealized loss position	73,226,000		77,798,000
Allowance for credit losses on AFS debt securities	$ 0
Average credit support percentage	22.00%
CLOs
Debt Securities, Available-for-sale [Line Items]
Unrealized losses on mortgage backed securities of government sponsored entities	$ 2,254,000		512,000
Fair value of securities in unrealized loss position	397,687,000		249,934,000
Allowance for credit losses on AFS debt securities	$ 0
CLOs \| Standard & Poor's, AAA Rating
Debt Securities, Available-for-sale [Line Items]
Number of positions held, percentage of total	38.00%
CLOs \| Standard & Poor's, AA Rating
Debt Securities, Available-for-sale [Line Items]
Number of positions held, percentage of total	24.00%
Obligations of state and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Unrealized losses on mortgage backed securities of government sponsored entities	$ 6,024,000		2,520,000
Fair value of securities in unrealized loss position	299,564,000		249,898,000
Allowance for credit losses on AFS debt securities	0
Other debt securities
Debt Securities, Available-for-sale [Line Items]
Unrealized losses on mortgage backed securities of government sponsored entities	1,933,000		576,000
Fair value of securities in unrealized loss position	$ 197,074,000		$ 132,345,000