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Derivative Instruments and Hedging Activities - Additional Information (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026 USD ($) position swap	Jun. 30, 2025 USD ($)	Jun. 30, 2026 USD ($) position swap	Jun. 30, 2025 USD ($)	Jul. 31, 2026 USD ($) position	May 14, 2026 USD ($)	Mar. 31, 2026 position	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)
Derivative [Line Items]
Notional amount	$ 23,589,104		$ 23,589,104					$ 22,489,009
Loans	52,467,251		52,467,251					50,136,728
Consumer loans
Derivative [Line Items]
Loans	4,174,233		4,174,233					4,105,035
Consumer loans \| Automobile
Derivative [Line Items]
Loans	2,150,089		2,150,089					2,184,600
Derivatives not designated as hedging instruments:
Derivative [Line Items]
Notional amount	$ 23,174,016		$ 23,174,016					21,708,687
Interest Rate Swaps Entered In 2026 \| Derivatives designated as hedging instruments
Derivative [Line Items]
Number of instruments held \| position	4		4
Interest Rate Swaps Entered In 2026 \| Fair value hedge interest rate swaps \| Derivatives designated as hedging instruments
Derivative [Line Items]
Notional amount	$ 204,300		$ 204,300
Interest Rate Swaps Entered In 2026 \| Fair value hedge interest rate swaps \| Derivatives designated as hedging instruments \| Minimum
Derivative [Line Items]
Derivative, fixed interest rate	3.73%		3.73%
Interest Rate Swaps Entered In 2026 \| Fair value hedge interest rate swaps \| Derivatives designated as hedging instruments \| Maximum
Derivative [Line Items]
Derivative, fixed interest rate	3.93%		3.93%
Interest Rate Swaps Entered In 2024 \| Derivatives designated as hedging instruments
Derivative [Line Items]
Number of instruments held \| position	5		5				11
Number of instruments expired \| position	6		6
Interest Rate Swaps Entered In 2024 \| Fair value hedge interest rate swaps \| Derivatives designated as hedging instruments
Derivative [Line Items]
Notional amount	$ 210,800		$ 210,800
Notional amount, expired	269,500		269,500
Subordinated Notes Due June 2031
Derivative [Line Items]
Notional amount						$ 300,000
Interest rate swaps
Derivative [Line Items]
Accumulated net after-tax gains related to effective cash flow hedges	$ 172		$ 172					420
Interest rate swaps \| Derivatives designated as hedging instruments \| Subsequent Event
Derivative [Line Items]
Number of instruments held \| position					5
Interest rate swaps \| Derivatives not designated as hedging instruments:
Derivative [Line Items]
Number of instruments held \| swap	91		91
Notional amount	$ 19,540,317		$ 19,540,317					18,685,777
Interest rate swaps \| Derivatives not designated as hedging instruments: \| Risk Participation Agreement
Derivative [Line Items]
Notional amount	972,100		972,100
Interest rate swaps \| Fair value hedge interest rate swaps \| Income Statement Location [Axis]: us-gaap:InterestExpenseOperating
Derivative [Line Items]
Fee income related to derivative interest rate swaps executed with commercial loan customers	541	$ 2,155	764	$ 6,724
Interest rate swaps \| Fair value hedge interest rate swaps \| Income Statement Location [Axis]: us-gaap:NoninterestIncome
Derivative [Line Items]
Fee income related to derivative interest rate swaps executed with commercial loan customers	9,600	8,300	19,200	14,000
Interest rate swaps \| Fair value hedge interest rate swaps \| Subsequent Event
Derivative [Line Items]
Notional amount					$ 239,000
Interest rate swaps \| Fair value hedge interest rate swaps \| Derivatives designated as hedging instruments
Derivative [Line Items]
Notional amount	$ 415,088		$ 415,088					780,322
Interest rate swaps \| Fair value hedge interest rate swaps \| Derivatives designated as hedging instruments \| Minimum \| Subsequent Event
Derivative [Line Items]
Derivative, fixed interest rate					3.93%
Interest rate swaps \| Fair value hedge interest rate swaps \| Derivatives designated as hedging instruments \| Maximum \| Subsequent Event
Derivative [Line Items]
Derivative, fixed interest rate					4.16%
Interest rate swaps \| Fair value hedge interest rate swaps \| Derivatives not designated as hedging instruments:
Derivative [Line Items]
Number of instruments held \| swap	2		2
Notional amount	$ 10,400		$ 10,400
Credit default swap \| Derivatives not designated as hedging instruments:
Derivative [Line Items]
Notional amount	471,914		471,914					$ 653,459	$ 1,500,000
Derivative, cost of hedge	$ 881	$ 1,800	$ 1,600	$ 3,800