Securities - Narrative (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2022 USD ($)	Dec. 31, 2022 USD ($) security	Dec. 31, 2021 USD ($) security	Dec. 31, 2020 USD ($)
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Fair value of debt securities from AFS to HTM	$ 3,010,000,000.00
Unrealized losses, net of tax, from transfer of AFS to HTM	$ 113,000,000	$ 113,000,000
AFS and HTM, accrued interest		$ 41,800,000	$ 33,100,000
Number of available-for-sale debt securities in an unrealized loss position | security		559	431
Allowance for credit loss		$ 0	$ 0
Provision for credit losses		0	0	$ 0
HTM securities allowance for credit loss		0
Amortized Cost		9,881,093,000
Asset Pledged as Collateral
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Amortized Cost		$ 794,200,000	$ 803,900,000
U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Number of available-for-sale debt securities in an unrealized loss position | security		263	180
U.S. government agency and U.S. government-sponsored enterprise debt securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Number of available-for-sale debt securities in an unrealized loss position | security			50
U.S. Treasury securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Number of available-for-sale debt securities in an unrealized loss position | security		15	21
Corporate debt securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Number of available-for-sale debt securities in an unrealized loss position | security		68	30
Non-agency mortgage-backed securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Number of available-for-sale debt securities in an unrealized loss position | security		100