Derivative Financial Instruments - Summary of Fair Value of Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Designated as Hedging Instrument
Derivative [Line Items]
Assets	$ 17,328	$ 11,764
Liabilities	43,109	47,859
Designated as Hedging Instrument \| Cash flow hedges \| Interest rate collars and floors on loan pools
Derivative [Line Items]
Notional	1,900,000	1,900,000
Assets	17,328	11,764
Liabilities	38,276	47,859
Designated as Hedging Instrument \| Cash flow hedges \| Interest rate swaps on borrowings
Derivative [Line Items]
Notional	150,000	150,000
Assets	0	0
Liabilities	0	0
Designated as Hedging Instrument \| Fair value hedges \| Interest rate swaps on borrowings
Derivative [Line Items]
Notional	200,000	300,000
Assets	0	0
Liabilities	0	0
Designated as Hedging Instrument \| Fair value hedges \| Interest rate swaps on investment securities
Derivative [Line Items]
Notional	909,957	909,957
Assets	0	0
Liabilities	4,833	0
Not Designated as Hedging Instrument
Derivative [Line Items]
Assets	148,741	157,237
Liabilities	277,886	332,845
Not Designated as Hedging Instrument \| Interest rate lock commitments
Derivative [Line Items]
Notional	38,945	21,401
Assets	380	93
Liabilities	0	0
Not Designated as Hedging Instrument \| Forward mortgage loan contracts
Derivative [Line Items]
Notional	45,047	30,330
Assets	0	32
Liabilities	148	0
Not Designated as Hedging Instrument \| Customer interest rate swaps
Derivative [Line Items]
Notional	5,575,403	5,220,363
Assets	19,470	5,676
Liabilities	257,902	326,924
Not Designated as Hedging Instrument \| Counterparty interest rate swaps
Derivative [Line Items]
Notional	5,575,403	5,220,363
Assets	128,487	151,111
Liabilities	19,610	5,711
Not Designated as Hedging Instrument \| Customer foreign currency forward contracts
Derivative [Line Items]
Notional	14,165	8,341
Assets	382	253
Liabilities	21	42
Not Designated as Hedging Instrument \| Counterparty foreign currency forward contracts
Derivative [Line Items]
Notional	14,143	8,297
Assets	22	72
Liabilities	$ 205	$ 168

Fair value, after the effects of master netting arrangements, of a 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. Includes assets not subject to a master netting arrangement and not elected to be offset.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 10
-URI https://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313

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- Definition

Fair value, after the effects of master netting arrangements, of a 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. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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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.

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No definition available.

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- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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