Securities - Narrative (Details) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Gross gains from sale of securities	$ 24,000
Gross losses from sale of securities	19,000
Unrealized losses on mortgage backed securities of government sponsored entities	224,755,000		$ 248,662,000
Fair value of securities in unrealized loss position	1,913,579,000		1,812,522,000
Held-to-maturity securities, allowance for credit loss	0
Federal Home Loan Bank and Federal Reserve stock recorded in other assets	78,900,000
Accrued interest receivable on AFS debt securities	7,800,000		7,000,000
Accrued interest receivable on HTM debt securities	$ 1,300,000		$ 1,300,000
Common stock, shares outstanding (in shares)	84,609,320		71,617,852
Visa | Common Class B
Debt Securities, Available-for-sale [Line Items]
Common stock, shares outstanding (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)	$ 1.5991
Shares issued (in shares)	18,117
Asset Pledged as Collateral
Debt Securities, Available-for-sale [Line Items]
Fair value of debt securities pledged as collateral	$ 2,000,000,000
Other debt securities
Debt Securities, Available-for-sale [Line Items]
Proceeds from sale of available-for-sale debt securities, including legacy securities	8,400,000
Unrealized losses on mortgage backed securities of government sponsored entities	410,000		$ 427,000
Fair value of securities in unrealized loss position	18,058,000		11,459,000
CRA - Qualified Mutual Fund
Debt Securities, Available-for-sale [Line Items]
Gross gains from sale of securities	100,000
Gross losses from sale of securities		$ (500,000)
Investment in mutual fund carried at fair value	13,700,000		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 on mortgage backed securities of government sponsored entities	203,663,000		223,083,000
Fair value of securities in unrealized loss position	1,406,849,000		1,314,171,000
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	12,359,000		12,831,000
Fair value of securities in unrealized loss position	134,890,000		155,722,000
Allowance for credit losses on AFS debt securities	$ 0
Average credit support percentage	22.00%
Collateralized loan obligations
Debt Securities, Available-for-sale [Line Items]
Unrealized losses on mortgage backed securities of government sponsored entities	$ 6,609,000		10,251,000
Fair value of securities in unrealized loss position	305,477,000		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	36.00%
Collateralized loan obligations | Standard & Poor's, AA Rating
Debt Securities, Available-for-sale [Line Items]
Number of positions held, percentage of total	25.00%
Obligations of state and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Unrealized losses on mortgage backed securities of government sponsored entities	$ 1,383,000		1,731,000
Fair value of securities in unrealized loss position	15,968,000		$ 24,229,000
Allowance for credit losses on AFS debt securities	0
Asset-back securities
Debt Securities, Available-for-sale [Line Items]
Unrealized losses on mortgage backed securities of government sponsored entities	300,000
Fair value of securities in unrealized loss position	10,800,000
Allowance for credit losses on AFS debt securities	0
Professional Holding Corp.
Debt Securities, Available-for-sale [Line Items]
Proceeds from sale of available-for-sale debt securities, including legacy securities	$ 22,100,000