Derivative Financial Instruments - Schedule of Effect of Derivative Instruments on the Consolidated Statements of Income (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Other Comprehensive Income on Derivative	$ (15,574)	$ (36,755)	$ 45,547	$ (49,679)
Gain (Loss) Reclassified from AOCI into Income	(4,927)	(749)	19,893	139
Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivative	814	821	1,869	436
Fair value hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivative	35,984	47,431	(11,232)	151,508
Gain (Loss) Recognized in Income on Related Hedged Items	(36,489)	(47,337)	10,632	(151,574)
Interest rate swaps on borrowings \| Fair value hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivative	(9,553)	(532)	(18,500)	(7,889)
Gain (Loss) Recognized in Income on Related Hedged Items	9,566	638	18,303	8,193
Interest rate swaps on investment securities \| Fair value hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivative	45,537	47,963	7,268	159,397
Gain (Loss) Recognized in Income on Related Hedged Items	(46,055)	(47,975)	(7,671)	(159,767)
Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Other Comprehensive Income on Derivative	(15,574)	(36,755)	4,302	(49,679)
Gain (Loss) Reclassified from AOCI into Income	(5,960)	(749)	17,481	139
Interest rate contracts \| Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivative	426	108	1,125	1,058
Mortgage contracts \| Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivative	391	638	760	(735)
Foreign currency contracts \| Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivative	$ (3)	$ 75	$ (16)	$ 113

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

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Total amount of gain (loss) derived from fair value hedges recognized in earnings in the period.

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Amount, before tax and reclassification, of gain (loss) from derivative instrument designated and qualifying cash flow hedge included in assessment of hedge effectiveness.

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Amount, before tax, of reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

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