Derivative Instruments and Hedging Activities - Impact Of Derivatives On Balance Sheet (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Designated as hedging instrument
Derivative [Line Items]
Estimated fair value of derivative assets	$ 0	$ 0
Estimated fair value of derivative liabilities	11,930	20,418
Not Designated As Hedging Instruments
Derivative [Line Items]
Estimated fair value of derivative assets	103,589	94,903
Estimated fair value of derivative liabilities	274,603	239,821
Not Designated As Hedging Instruments \| Interest rate contracts
Derivative [Line Items]
Notional Amount	12,377,962	11,888,152
Estimated fair value of derivative assets	102,302	94,208
Estimated fair value of derivative liabilities	274,055	238,134
Not Designated As Hedging Instruments \| Mortgage derivatives \| Mortgage derivatives - interest rate lock commitments
Derivative [Line Items]
Notional Amount	60,402	40,642
Estimated fair value of derivative assets	1,095	695
Estimated fair value of derivative liabilities	0	0
Not Designated As Hedging Instruments \| Mortgage derivatives \| Mortgage derivatives - forward commitments to sell fixed-rate mortgage loans
Derivative [Line Items]
Notional Amount	82,519	60,906
Estimated fair value of derivative assets	0	0
Estimated fair value of derivative liabilities	105	567
Not Designated As Hedging Instruments \| Risk participation agreements
Derivative [Line Items]
Notional Amount	781,904	732,682
Estimated fair value of derivative assets	0	0
Estimated fair value of derivative liabilities	4	3
Not Designated As Hedging Instruments \| Foreign exchange contracts
Derivative [Line Items]
Notional Amount	64,043	41,603
Estimated fair value of derivative assets	192	0
Estimated fair value of derivative liabilities	0	528
Not Designated As Hedging Instruments \| Visa derivative
Derivative [Line Items]
Notional Amount	0	0
Estimated fair value of derivative assets	0	0
Estimated fair value of derivative liabilities	439	589
Cash Flow Hedges
Derivative [Line Items]
Estimated fair value of derivative assets	0	0
Estimated fair value of derivative liabilities	4,337	7,527
Cash Flow Hedges \| Interest rate contracts
Derivative [Line Items]
Notional Amount	4,600,000	5,600,000
Estimated fair value of derivative assets	0	0
Estimated fair value of derivative liabilities	4,337	7,527
Fair Value Hedges
Derivative [Line Items]
Estimated fair value of derivative assets	0	0
Estimated fair value of derivative liabilities	7,593	12,891
Fair Value Hedges \| Interest rate contracts
Derivative [Line Items]
Notional Amount	2,728,580	2,563,504
Estimated fair value of derivative assets	0	0
Estimated fair value of derivative liabilities	$ 7,593	$ 12,891

Fair value, after offset of derivative liability, of financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, before offset against an obligation to return collateral under a master netting arrangement. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Section 55
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition

Fair value, after offset of derivative asset, of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, elected not to be and before offset against a right to receive collateral under a master netting arrangement. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
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-Publisher FASB
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- Details

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