Commitments and Contingencies - Additional Information (Details)		1 Months Ended	12 Months Ended
	May 28, 2021	Jun. 30, 2021 USD ($)	Dec. 31, 2022 USD ($) swap contract	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Commitments And Contingencies [Line Items]
Subordinated notes, interest rate	3.00%
Derivatives designated as hedging instruments:
Commitments And Contingencies [Line Items]
Notional amount			$ 900,000,000	$ 1,000,000,000
Derivatives not designated as hedging instruments:
Commitments And Contingencies [Line Items]
Notional amount			16,058,364,000	10,613,888,000
Derivative—interest rate swaps:
Commitments And Contingencies [Line Items]
Notional amount		$ 300,000,000
Accumulated net after-tax losses related to effective cash flow hedges			2,200,000	1,300,000
Reclassified to interest expense			3,500,000
Derivative—interest rate swaps: | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Commitments And Contingencies [Line Items]
Annual interest rate spread, percentage		2.187%
Derivative—interest rate swaps: | Fair value hedge interest rate swaps | Non-interest income
Commitments And Contingencies [Line Items]
Fee income			$ 43,100,000	26,900,000	$ 59,000,000
Derivative—interest rate swaps: | Derivatives designated as hedging instruments: | Cash flow hedge interest rate swaps
Commitments And Contingencies [Line Items]
Number of derivative instruments | contract			6
Notional amount			$ 600,000,000
Derivative—interest rate swaps: | Derivatives designated as hedging instruments: | Fair value hedge interest rate swaps
Commitments And Contingencies [Line Items]
Notional amount			$ 300,000,000	300,000,000
Derivative—interest rate swaps: | Derivatives not designated as hedging instruments:
Commitments And Contingencies [Line Items]
Number of derivative instruments | swap			35
Notional amount			$ 14,753,330,000	$ 10,179,294,000
Derivative—interest rate swaps: | Derivatives not designated as hedging instruments: | Risk Participation
Commitments And Contingencies [Line Items]
Notional amount			$ 374,300,000
Derivative—interest rate swaps: | Derivatives not designated as hedging instruments: | Fair value hedge interest rate swaps
Commitments And Contingencies [Line Items]
Number of derivative instruments | swap			2
Notional amount			$ 10,400,000