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Derivative Financial Instruments - Summary of Derivative Notional Amounts and Fair Values (Details) - USD ($)	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	$ 3,000,720,000		$ 2,168,615,000
Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	1,425,000,000		1,225,000,000
Interest rate contracts | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	$ 925,000,000		614,000,000
Weighted-average term	2 years 9 months 18 days	4 years 1 month 6 days
Interest rate contracts | Correspondent Banks | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	$ 1,589,746,000		1,013,407,000
Interest rate contracts | Customers | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	1,263,725,000		1,013,407,000
Interest Rate Swap, forward starting | Cash Flow Hedge | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount			111,000,000
Weighted-average term		3 years 10 months 24 days
Interest Rate Swap, forward starting | Interest Rate Cap | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	$ 500,000,000		500,000,000
Weighted-average term	3 years 6 months	3 years
Foreign Exchange Contract | Correspondent Banks | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	$ 5,691,000		2,359,000
Foreign Exchange Contract | Customers | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	5,691,000		2,359,000
Risk participation agreement | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	132,117,000		134,282,000
Interest Rate Lock Commitments and Forward Contracts | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	3,750,000		2,801,000
Other assets | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Credit valuation adjustment	70,661,000		73,497,000
Other assets | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest rate derivatives	0		25,383,000
Other assets | Interest rate contracts | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest rate derivatives	0		19,773,000
Other assets | Interest rate contracts | Correspondent Banks | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest rate derivatives	70,165,000		73,059,000
Other assets | Interest rate contracts | Customers | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest rate derivatives	351,000		330,000
Other assets | Interest Rate Swap, forward starting | Cash Flow Hedge | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest rate derivatives			5,428,000
Other assets | Interest Rate Swap, forward starting | Interest Rate Cap | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest rate derivatives	0		182,000
Other assets | Foreign Exchange Contract | Correspondent Banks | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Foreign exchange contracts	90,000		79,000
Other assets | Foreign Exchange Contract | Customers | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Foreign exchange contracts	30,000		0
Other assets | Risk participation agreement | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Credit valuation adjustment	0		0
Other assets | Interest Rate Lock Commitments and Forward Contracts | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Credit valuation adjustment	25,000		29,000
Other liabilities | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Credit valuation adjustment	72,977,000		73,517,000
Other liabilities | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest rate derivatives	4,812,000		2,055,000
Other liabilities | Interest rate contracts | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest rate derivatives	0		1,227,000
Other liabilities | Interest rate contracts | Correspondent Banks | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest rate derivatives	351,000		330,000
Other liabilities | Interest rate contracts | Customers | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest rate derivatives	72,489,000		73,059,000
Other liabilities | Interest Rate Swap, forward starting | Cash Flow Hedge | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest rate derivatives			0
Other liabilities | Interest Rate Swap, forward starting | Interest Rate Cap | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest rate derivatives	4,812,000		828,000
Other liabilities | Foreign Exchange Contract | Correspondent Banks | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Foreign exchange contracts	24,000		0
Other liabilities | Foreign Exchange Contract | Customers | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Foreign exchange contracts	81,000		73,000
Other liabilities | Risk participation agreement | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Credit valuation adjustment	28,000		32,000
Other liabilities | Interest Rate Lock Commitments and Forward Contracts | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Credit valuation adjustment	$ 4,000		$ 23,000

X

- Definition

Average remaining period until maturity of the derivative contract, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

Amount of credit risk valuation adjustment to derivative liabilities to properly reflect the credit quality of the entity.

+ References

No definition available.

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- Definition

Fair value of the assets less the liabilities of a derivative or group of derivatives.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482907/825-10-50-10

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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

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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
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480434/815-10-50-1B

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1A
-Subparagraph (d)
-Publisher FASB
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- Definition

Net fair value of all derivative instruments not designated as a hedging instrument.

+ References

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