Derivative Instruments and Hedging Activities - Additional Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($) swap	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($)
Derivatives not designated as hedging instruments:
Derivative [Line Items]
Notional amount	$ 17,684,279		$ 17,878,243
Interest rate swaps
Derivative [Line Items]
Accumulated net after-tax gains related to effective cash flow hedges	1,900		2,100
Interest rate swaps | Interest income
Derivative [Line Items]
Amounts reclassified to income statement	1,200
Interest rate swaps | Fair value hedge interest rate swaps | Interest income
Derivative [Line Items]
Fee income related to derivative interest rate swaps executed with commercial loan customers	4,879	$ 0
Interest rate swaps | Fair value hedge interest rate swaps | Noninterest Income
Derivative [Line Items]
Fee income related to derivative interest rate swaps executed with commercial loan customers	$ 4,500	$ 9,900
Interest rate swaps | Derivatives not designated as hedging instruments:
Derivative [Line Items]
Number of instruments held | swap	44
Notional amount	$ 16,200,678		$ 16,282,279
Interest rate swaps | Derivatives not designated as hedging instruments: | Fair value hedge interest rate swaps
Derivative [Line Items]
Number of instruments held | swap	2
Notional amount	$ 10,400
Interest rate swaps | Derivatives not designated as hedging instruments: | Risk Participation Agreement
Derivative [Line Items]
Notional amount	$ 605,500