Fair Value Disclosures - Schedule of Estimated Fair Values of the Company’s Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Financial Assets
Net carrying amount	$ 6,372,463	$ 5,603,723
Held to maturity	1,689	3,225
Equity	48,200	48,770
Trading	0	666
Add: Unearned income	11,284,931	11,469,812
Reported Value Measurement
Financial Assets
Net carrying amount	6,372,463	5,603,723
Held to maturity	1,689	3,225
Equity	48,200	48,770
Trading	0	666
Add: Unearned income	11,284,931	11,469,812
Loans held for sale	54,119	34,264
Derivatives	7,969	10,312
Total assets	19,834,553	18,413,279
Financial Liabilities
Federal funds purchased and customer repurchase agreements	1,011,851	1,007,295
Accrued interest payable	9,306	10,291
Derivatives	7,021	8,842
Cash and due from banks | Reported Value Measurement
Financial Assets
Cash and due from banks	258,588	265,209
Short-term interest-bearing deposits | Reported Value Measurement
Financial Assets
Cash and due from banks	1,805,215	969,416
Time deposits | Reported Value Measurement
Financial Assets
Cash and due from banks	1,039	699
Federal funds sold and securities purchased under agreements to resell | Reported Value Measurement
Financial Assets
Cash and due from banks	340	7,183
Quoted prices in active markets for identical assets (Level 1) | Estimate of Fair Value Measurement
Financial Assets
Net carrying amount	929,305	1,270,167
Held to maturity	0	0
Equity	0	724
Trading	0	0
Add: Unearned income	0	0
Loans held for sale	0	0
Derivatives	0	0
Total assets	2,993,448	2,512,699
Financial Liabilities
Federal funds purchased and customer repurchase agreements	1,011,851	1,007,295
Accrued interest payable	9,306	10,291
Derivatives	0	0
Quoted prices in active markets for identical assets (Level 1) | Cash and due from banks | Estimate of Fair Value Measurement
Financial Assets
Cash and due from banks	258,588	265,209
Quoted prices in active markets for identical assets (Level 1) | Short-term interest-bearing deposits | Estimate of Fair Value Measurement
Financial Assets
Cash and due from banks	1,805,215	969,416
Quoted prices in active markets for identical assets (Level 1) | Time deposits | Estimate of Fair Value Measurement
Financial Assets
Cash and due from banks	0	0
Quoted prices in active markets for identical assets (Level 1) | Federal funds sold and securities purchased under agreements to resell | Estimate of Fair Value Measurement
Financial Assets
Cash and due from banks	340	7,183
Significant other observable inputs (Level 2) | Estimate of Fair Value Measurement
Financial Assets
Net carrying amount	5,443,158	4,333,556
Held to maturity	1,023	2,554
Equity	36,690	36,765
Trading	0	666
Add: Unearned income	0	0
Loans held for sale	54,119	34,264
Derivatives	7,969	10,312
Total assets	5,542,959	4,418,117
Financial Liabilities
Federal funds purchased and customer repurchase agreements	0	0
Accrued interest payable	0	0
Derivatives	7,021	8,842
Significant other observable inputs (Level 2) | Cash and due from banks | Estimate of Fair Value Measurement
Financial Assets
Cash and due from banks	0	0
Significant other observable inputs (Level 2) | Short-term interest-bearing deposits | Estimate of Fair Value Measurement
Financial Assets
Cash and due from banks	0	0
Significant other observable inputs (Level 2) | Time deposits | Estimate of Fair Value Measurement
Financial Assets
Cash and due from banks	0	0
Significant other observable inputs (Level 2) | Federal funds sold and securities purchased under agreements to resell | Estimate of Fair Value Measurement
Financial Assets
Cash and due from banks	0	0
Significant unobservable inputs (Level 3) | Estimate of Fair Value Measurement
Financial Assets
Net carrying amount	0	0
Held to maturity	677	677
Equity	11,510	11,281
Trading	0	0
Add: Unearned income	11,285,348	11,283,393
Loans held for sale	0	0
Derivatives	0	0
Total assets	11,298,574	11,296,050
Financial Liabilities
Federal funds purchased and customer repurchase agreements	0	0
Accrued interest payable	0	0
Derivatives	0	0
Significant unobservable inputs (Level 3) | Cash and due from banks | Estimate of Fair Value Measurement
Financial Assets
Cash and due from banks	0	0
Significant unobservable inputs (Level 3) | Short-term interest-bearing deposits | Estimate of Fair Value Measurement
Financial Assets
Cash and due from banks	0	0
Significant unobservable inputs (Level 3) | Time deposits | Estimate of Fair Value Measurement
Financial Assets
Cash and due from banks	1,039	699
Significant unobservable inputs (Level 3) | Federal funds sold and securities purchased under agreements to resell | Estimate of Fair Value Measurement
Financial Assets
Cash and due from banks	$ 0	$ 0