Derivative Instruments and Hedging Activities - Gains (Losses) on Interest Rate Derivatives Designated as Fair Value Hedges (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Gain Loss On Fair Value Hedges Recognized In Earnings [Line Items]
Gain (loss) related to hedged loans			$ (9,349)	$ (20,452)
Fair value hedge interest rate swaps | Interest income | Derivative - interest rate swap:
Gain Loss On Fair Value Hedges Recognized In Earnings [Line Items]
Gain (loss) related to derivative interest rate swaps	$ 0	$ (2,385)	0	3,170
Fair value hedge interest rate swaps | Interest income | Hedged items - loans, time deposits and subordinated debt: | Derivatives designated as hedging instruments
Gain Loss On Fair Value Hedges Recognized In Earnings [Line Items]
Gain (loss) related to hedged loans	(160)	2,391	(482)	(3,235)
Fair value hedge interest rate swaps | Interest expense | Derivative - interest rate swap:
Gain Loss On Fair Value Hedges Recognized In Earnings [Line Items]
Gain (loss) related to derivative interest rate swaps	2,092	15,244	8,816	16,957
Fair value hedge interest rate swaps | Interest expense | Hedged items - loans, time deposits and subordinated debt: | Derivatives designated as hedging instruments
Gain Loss On Fair Value Hedges Recognized In Earnings [Line Items]
Gain (loss) related to hedged loans	$ (2,141)	$ (15,537)	$ (8,867)	$ (17,217)