Securities - Narrative (Details) - USD ($)	1 Months Ended	12 Months Ended
	Jan. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Proceeds from sale of available-for-sale debt securities, including legacy securities			$ 515,200,000	$ 102,100,000
Gross gains from sale of securities				300,000
Gross losses from sale of securities				600,000
Unrealized losses		$ 217,714,000	248,662,000
Fair value of mortgage backed securities of government sponsored entities		1,669,656,000	1,812,522,000
Held-to-maturity securities, allowance for credit loss		0
Other assets of Federal Home Loan Bank and Federal Reserve Bank		67,700,000
Accrued interest receivable on AFS debt securities		7,900,000	7,000,000
Accrued interest receivable on HTM debt securities		$ 1,100,000	$ 1,300,000
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]		Other assets	Other assets
Debt Securities, Held-to-Maturity, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]		Other assets	Other assets
Shares held (in shares)		84,861,498	71,617,852
Common Class B | Visa
Debt Securities, Available-for-sale [Line Items]
Shares held (in shares)		11,330
Common Class B | Visa | Subsequent Event
Debt Securities, Available-for-sale [Line Items]
Proceeds from sale of equity securities	$ 4,100,000
Asset Pledged as Collateral
Debt Securities, Available-for-sale [Line Items]
Securities pledged as collateral		$ 1,700,000,000
Other debt securities
Debt Securities, Available-for-sale [Line Items]
Proceeds from sale of available-for-sale debt securities, including legacy securities		113,400,000
Gross gains from sale of securities		25,000
Gross losses from sale of securities		3,000,000
Unrealized losses		101,000	$ 427,000
Fair value of mortgage backed securities of government sponsored entities		10,579,000	11,459,000
CRA - qualified debt securities
Debt Securities, Available-for-sale [Line Items]
Gross gains from sale of securities		42,000
Gross losses from sale of securities			1,100,000	$ 200,000
Equity securities		13,600,000	8,200,000
Mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities
Debt Securities, Available-for-sale [Line Items]
Unrealized losses		203,700,000
Fair value of mortgage backed securities of government sponsored entities		1,200,000,000
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		10,911,000	12,831,000
Fair value of mortgage backed securities of government sponsored entities		123,420,000	155,722,000
Allowance for credit losses on AFS debt securities		$ 0
Average credit support percentage		23.00%
Collateralized loan obligations
Debt Securities, Available-for-sale [Line Items]
Unrealized losses		$ 1,411,000	10,251,000
Fair value of mortgage backed securities of government sponsored entities		292,632,000	302,904,000
Allowance for credit losses on AFS debt securities		$ 0
Collateralized loan obligations | Standard & Poor's, AAA Rating
Debt Securities, Available-for-sale [Line Items]
Number of positions held, percentage of total		35.00%
Collateralized loan obligations | Standard & Poor's, AA Rating
Debt Securities, Available-for-sale [Line Items]
Number of positions held, percentage of total		26.00%
Obligations of state and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Unrealized losses		$ 1,096,000	1,731,000
Fair value of mortgage backed securities of government sponsored entities		9,390,000	$ 24,229,000
Allowance for credit losses on AFS debt securities		$ 0