International Bancshares (IBOC) 10-K 27 Feb 25 2024 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Feb. 24, 2025	Jun. 30, 2024
Document and Entity Information
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2024
Document Transition Report	false
Securities Act File Number	0-09439
Entity Registrant Name	INTERNATIONAL BANCSHARES CORPORATION
Entity Incorporation, State or Country Code	TX
Entity Tax Identification Number	74-2157138
Entity Address, Address Line One	1200 San Bernardo Avenue
Entity Address, City or Town	Laredo
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	78042 - 1359
City Area Code	956
Local Phone Number	722-7611
Title of 12(b) Security	Common Stock, $1.00 par value
Trading Symbol	IBOC
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Document Financial Statement Error Correction [Flag]	false
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
ICFR Auditor Attestation Flag	true
Auditor Name	RSM US LLP
Auditor Firm ID	49
Auditor Location	Austin, Texas
Entity Public Float			$ 3,557,308
Entity Common Stock, Shares Outstanding		62,215,830
Entity Central Index Key	0000315709
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	FY
Amendment Flag	false

Consolidated Statements of Cond

Consolidated Statements of Condition - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Assets
Cash and cash equivalents	$ 352,652	$ 651,058
Investment securities:
Held to maturity debt securities (Market value of $4,400 on December 31, 2024 and $3,400 on December 31, 2023)	4,400	3,400
Available for sale debt securities (Amortized cost of $5,472,310 on December 31, 2024 and $5,330,814 on December 31, 2023)	4,987,916	4,822,341
Equity securities with readily determinable fair values	5,394	5,417
Total investment securities	4,997,710	4,831,158
Loans	8,809,826	8,058,961
Less allowance for credit losses	(156,537)	(157,069)
Net loans	8,653,289	7,901,892
Bank premises and equipment, net	428,221	437,094
Accrued interest receivable	72,175	65,302
Other investments	356,735	343,452
Cash surrender value of life insurance policies	303,042	303,486
Goodwill	282,532	282,532
Other assets	292,496	250,215
Total assets	15,738,852	15,066,189
Deposits:
Demand-non-interest bearing	4,612,344	5,030,845
Savings and interest bearing demand	4,599,957	4,368,532
Time	2,899,543	2,425,177
Total deposits	12,111,844	11,824,554
Securities sold under repurchase agreements	535,322	530,416
Other borrowed funds	10,541	10,745
Junior subordinated deferrable interest debentures	108,868	108,868
Other liabilities	175,570	143,832
Total liabilities	12,942,145	12,618,415
Shareholders' equity:
Common shares of $1.00 par value. Authorized 275,000,000 shares; issued 96,616,673 shares on December 31, 2024 and 96,466,900 shares on December 31, 2023	96,617	96,467
Surplus	159,333	155,511
Retained earnings	3,356,177	3,029,088
Accumulated other comprehensive loss	(379,054)	(397,889)
Total shareholders' equity before treasury stock	3,233,073	2,883,177
Less cost of shares in treasury, 34,407,674 shares on December 31, 2024 and 34,391,184 on December 31, 2023	(436,366)	(435,403)
Total shareholders' equity	2,796,707	2,447,774
Total liabilities and shareholders' equity	$ 15,738,852	$ 15,066,189

Consolidated Statements of Co_2

Consolidated Statements of Condition (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Consolidated Statements of Condition
Held to maturity, Market value (in dollars)	$ 4,400	$ 3,400
Available for sale, Amortized cost (in dollars)	$ 5,472,310	$ 5,330,814
Common shares, par value (in dollars per share)	$ 1	$ 1
Common shares, Authorized shares	275,000,000	275,000,000
Common shares, issued shares	96,616,673	96,466,900
Treasury, shares	34,407,674	34,391,184

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Interest income:
Loans, including fees	$ 681,280	$ 620,048	$ 402,177
Investment securities:
Taxable	153,486	132,151	74,988
Tax-exempt	6,146	6,259	2,541
Other interest income	25,070	41,704	46,075
Total interest income	865,982	800,162	525,781
Interest expense:
Savings deposits	81,912	60,337	12,686
Time deposits	96,968	53,158	11,157
Securities sold under repurchase agreements	22,340	14,760	2,495
Other borrowings	281	283	6,781
Junior subordinated deferrable interest debentures	7,762	8,123	5,037
Total interest expense	209,263	136,661	38,156
Net interest income	656,719	663,501	487,625
Credit loss expense	31,802	34,576	21,651
Net interest income after provision for credit losses	624,917	628,925	465,974
Non-interest income:
Investment securities transactions, net	(1)	(3)
Other investments income, net	13,133	9,601	17,538
Other income	21,042	18,941	32,994
Total non-interest income	176,922	169,941	187,134
Non-interest expense:
Employee compensation and benefits	145,944	134,441	127,722
Occupancy	27,012	25,832	25,654
Depreciation of bank premises and equipment	22,524	21,944	21,821
Professional fees	15,726	14,000	11,292
Deposit insurance assessments	6,865	6,285	6,987
Net operations, other real estate owned	1,298	(3,983)	122
Advertising	6,289	5,010	4,588
Software and software maintenance	21,093	20,046	15,271
Other	46,368	51,779	57,012
Total non-interest expense	293,119	275,354	270,469
Income before income taxes	508,720	523,512	382,639
Provision for income taxes	99,553	111,744	82,407
Net income	$ 409,167	$ 411,768	$ 300,232
Basic earnings per common share:
Weighted average number of shares outstanding (in shares)	62,180,448	62,082,827	62,658,414
Net income per common share (in dollars per share)	$ 6.58	$ 6.63	$ 4.79
Fully diluted earnings per common share:
Weighted average number of shares outstanding (in shares)	62,298,278	62,221,601	62,810,234
Net income per common share (in dollars per share)	$ 6.57	$ 6.62	$ 4.78
Service charges on deposit accounts
Non-interest income:
Service charges on deposit accounts	$ 73,714	$ 73,933	$ 72,781
Other service charges, commissions and fees, Banking
Non-interest income:
Service charges on deposit accounts	58,682	57,923	55,253
Other service charges, commissions and fees, Non-banking
Non-interest income:
Service charges on deposit accounts	$ 10,352	$ 9,546	$ 8,568

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Consolidated Statements of Comprehensive Income
Net Income (Loss)	$ 409,167	$ 411,768	$ 300,232
Other comprehensive income (loss), net of tax:
Net change in unrealized holding gains (losses) on securities available for sale arising during period (net of tax effects of $5,007, $19,300, and $(116,568))	18,834	72,606	(438,517)
Reclassification adjustment for losses on securities available for sale included in net income (net of tax effects of $0, $1, and $0)	1	2
Total other comprehensive income (loss), net of tax	18,835	72,608	(438,517)
Comprehensive income (loss)	$ 428,002	$ 484,376	$ (138,285)

Consolidated Statements of Co_3

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Consolidated Statements of Comprehensive Income
Net change in unrealized holding gains (losses) on securities available for sale arising during period, tax effects	$ 5,007	$ 19,300	$ (116,568)
Reclassification adjustment for losses on securities available for sale included in net income, tax effects	$ 0	$ 1	$ 0

Consolidated Statements of Shar

Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Preferred Stock	Common Stock	Surplus	Retained Earnings	Other Comprehensive Income (Loss)	Treasury Stock	Total
Balance at Dec. 31, 2021		$ 96,351	$ 152,144	$ 2,470,710	$ (31,980)	$ (378,744)	$ 2,308,481
Balance (in shares) at Dec. 31, 2021	96,351
Increase (decrease) in shareholders' equity
Net Income (Loss)				300,232			300,232
Dividends:
Dividends Payable/ Cash				(75,375)			(75,375)
Purchase of treasury stock						(52,048)	(52,048)
Exercise of stock options		69	1,468				1,537
Exercise of stock options (in shares)	69
Stock compensation expense recognized in earnings			449				449
Other comprehensive income (loss), net of tax:
Net change in unrealized gains and losses on available for sale securities, net of reclassification adjustments					(438,517)		(438,517)
Balance at Dec. 31, 2022		96,420	154,061	2,695,567	(470,497)	(430,792)	2,044,759
Balance (in shares) at Dec. 31, 2022	96,420
Increase (decrease) in shareholders' equity
Net Income (Loss)				411,768			411,768
Dividends:
Dividends Payable/ Cash				(78,247)			(78,247)
Purchase of treasury stock						(4,611)	(4,611)
Exercise of stock options		47	1,120				1,167
Exercise of stock options (in shares)	47
Stock compensation expense recognized in earnings			330				330
Other comprehensive income (loss), net of tax:
Net change in unrealized gains and losses on available for sale securities, net of reclassification adjustments					72,608		72,608
Balance at Dec. 31, 2023		96,467	155,511	3,029,088	(397,889)	(435,403)	2,447,774
Balance (in shares) at Dec. 31, 2023	96,467
Increase (decrease) in shareholders' equity
Net Income (Loss)				409,167			409,167
Dividends:
Dividends Payable/ Cash				(82,078)			(82,078)
Purchase of treasury stock						(963)	(963)
Exercise of stock options		150	3,608				3,758
Exercise of stock options (in shares)	150
Stock compensation expense recognized in earnings			214				214
Other comprehensive income (loss), net of tax:
Net change in unrealized gains and losses on available for sale securities, net of reclassification adjustments					18,835		18,835
Balance at Dec. 31, 2024		$ 96,617	$ 159,333	$ 3,356,177	$ (379,054)	$ (436,366)	$ 2,796,707
Balance (in shares) at Dec. 31, 2024	96,617

Consolidated Statements of Sh_2

Consolidated Statements of Shareholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Consolidated Statements of Shareholders' Equity
Payable (in dollars per share)	$ 1.32	$ 1.26	$ 1.2
Purchase of treasury stock (in shares)	16,490	112,567	1,299,344

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Operating activities:
Net income	$ 409,167	$ 411,768	$ 300,232
Adjustments to reconcile net income to net cash provided by operating activities:
Credit loss expense	31,802	34,576	21,651
Specific reserve, other real estate owned	632	2,538	1,627
Depreciation of bank premises and equipment	22,524	21,944	21,821
Gain on sale of bank premises and equipment	(378)	(198)	(3,110)
Loss (gain) on sale of other real estate owned	182	(7,370)	(2,096)
Accretion of investment securities discounts	(3,022)	(1,913)	(1,785)
Amortization of investment securities premiums	5,553	6,901	13,907
Investment securities transactions, net	1	3
Unrealized loss (gain) on equity securities with readily determinable fair values	24	(59)	721
Stock based compensation expense	214	330	449
Earnings from affiliates and other investments	(7,360)	(983)	(15,894)
Deferred tax (benefit) expense	(11,466)	22,950	10,619
Increase in accrued interest receivable	(6,873)	(19,515)	(15,194)
(Increase) decrease in other assets	(8,067)	(7,297)	12,975
Increase in other liabilities	41,015	10,757	42,018
Net cash provided by operating activities	473,948	474,432	387,941
Investing activities:
Proceeds from maturities of securities	2,075	51,167	2,200
Proceeds from sales and calls of available for sale securities	3,750	2,045	800
Purchases of available for sale securities	(984,543)	(1,079,215)	(1,455,249)
Principal collected on mortgage backed securities	833,690	629,194	756,092
Net increase in loans	(812,477)	(632,976)	(228,340)
Purchases of other investments	(48,052)	(31,256)	(79,669)
Distributions from other investments	32,007	12,175	8,886
Purchases of bank premises and equipment	(14,147)	(27,497)	(19,213)
Proceeds from sales of bank premises and equipment	874	269	13,496
Proceeds from sales of other real estate owned	1,760	8,888	8,969
Net cash used in investing activities	(985,063)	(1,067,206)	(992,028)
Financing activities:
Net (decrease) increase in non-interest bearing demand deposits	(418,501)	(815,210)	7,529
Net increase (decrease) in savings and interest bearing demand deposits	231,425	(377,236)	155,220
Net increase (decrease) in time deposits	474,366	356,993	(120,619)
Net increase (decrease) in securities sold under repurchase agreements	4,906	99,225	(8,481)
Net decrease in other borrowed funds	(204)	(199)	(425,194)
Redemption of long-term debt		(25,774)
Purchase of treasury stock	(963)	(4,611)	(52,048)
Proceeds from stock transactions	3,758	1,167	1,537
Payments of cash dividends	(82,078)	(78,247)	(75,375)
Net cash provided by (used in) financing activities	212,709	(843,892)	(517,431)
Decrease in cash and cash equivalents	(298,406)	(1,436,666)	(1,121,518)
Cash and cash equivalents at beginning of period	651,058	2,087,724	3,209,242
Cash and cash equivalents at end of period	352,652	651,058	2,087,724
Supplemental cash flow information:
Interest paid	201,827	117,936	36,355
Income taxes paid	51,239	69,799	22,118
Non-cash investing and financing activities:
Purchases of available-for-sale securities not yet settled			80,000
Net transfers from loans to other real estate owned	3,727	$ 600	835
Net transfers from loans to other investments	$ 25,551
Net transfers from bank premises and equipment to other assets			$ 2,476

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2024
Summary of Significant Accounting Policies
Summary of Significant Accounting Policies	(1) Summary of Significant Accounting Policies Our accounting and reporting policies conform to U.S. generally accepted accounting principles (“GAAP”) and to general practices within the banking industry. The following is a description of the more significant of those policies. Consolidation and Basis of Presentation Our consolidated financial statements include the accounts of the International Bancshares Corporation, its wholly owned Subsidiary Banks and its wholly owned non-bank subsidiaries, IBC Trading Company, Premier Tierra Holdings, Inc., IBC Charitable and Community Development Corporation, IBC Capital Corporation and Diamond Beach Holdings, LLC. All significant inter-company balances and transactions have been eliminated in consolidation. We, through our Subsidiary Banks, are primarily engaged in the business of banking, including the acceptance of checking and savings deposits and the making of commercial, real estate, personal, home improvement, automobile, and other installment and term loans. Our primary markets are north, south, central, and southeast Texas and the state of Oklahoma. Each of our Subsidiary Banks is highly active in facilitating international trade along the United States border with Mexico and elsewhere. Although our loan portfolio is diversified, the ability of our debtors to honor their contracts is primarily dependent upon the economic conditions in our trade area. In addition, the investment portfolio is directly impacted by fluctuations in market interest rates. We are subject to the regulations of certain federal agencies as well as the Texas Department of Banking and the Oklahoma Department of Banking and undergo periodic examinations by those regulatory authorities. Such agencies may require certain standards or impose certain limitations based on their judgments or changes in law and regulations. We own one insurance-related subsidiary, IBC Insurance Agency, Inc., a wholly owned subsidiary of our Subsidiary Bank, International Bank of Commerce, Laredo. The insurance-related subsidiary does not conduct underwriting activities. The preparation of the consolidated financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the dates of the statement of condition and income and expenses for the periods. Actual results could differ significantly from those estimates. Material estimates that are particularly susceptible to significant changes in the near-term relate to the determination of the allowance for credit losses (“ACL”). Subsequent Events We have evaluated all events or transactions that occurred through the date we issued these financial statements. During this period, we did not have any material recognizable or non-recognizable subsequent events. Investment Securities We classify debt securities into one of these categories: held-to-maturity, available-for-sale, or trading. Such classifications are reassessed for appropriate classification at each reporting date. Securities that are intended and expected to be held until maturity are classified as “held-to-maturity” and are carried at amortized cost for financial statement reporting. Securities that are not positively expected to be held until maturity but are intended to be held for an indefinite period of time are classified as “available-for-sale” or “trading” and are carried at their fair value. Unrealized holding gains and losses are included in net income for those securities classified as “trading,” while unrealized holding gains and losses related to those securities classified as “available-for-sale” are excluded from net income and reported net of tax as other comprehensive income (loss) and in shareholders’ equity as accumulated other comprehensive income (loss) until realized. Unrealized gains and losses related to equity securities with readily determinable fair values are included in net income. Available-for-sale and held-to-maturity debt securities in an unrealized loss position are evaluated for the underlying cause of the loss. In the event that the deterioration in value is attributable to credit related reasons, then the amount of credit- related impairment would be recorded as a charge to our ACL with subsequent changes in the amount of impairment, up or down, also recorded through our ACL. The exception to this process will occur if we intend to sell an impaired available- for-sale debt security or if we will more likely than not be required to sell a credit impaired available-for-sale debt security prior to the value recovering to the security’s amortized cost. In those situations, the entire credit-related impairment amount would be required to be recognized in earnings. We have evaluated the debt securities classified as available-for-sale and held-to-maturity at December 31, 2024 and have determined that no debt securities in an unrealized loss position are arising from credit related reasons and have therefore not recorded any allowances for debt securities in our ACL for the periods. We did not maintain any trading securities during the three-year period ended December 31, 2024. Mortgage-backed securities held at December 31, 2024 and 2023 represent participating interests in pools of long-term first mortgage loans originated and serviced by the issuers of the securities. Mortgage-backed securities are either issued or guaranteed by the U.S. government or its agencies including Freddie Mac, Fannie Mae, Ginnie Mae or other non-government entities. Investments in residential mortgage-backed securities issued by Ginnie Mae are fully guaranteed by the U. S. government. Investments in residential mortgage-backed securities issued by Freddie Mac and Fannie Mae are not fully guaranteed by the U.S. government; however, we believe that the quality of the bonds is similar to other AAA rated bonds with limited credit risk, particularly given the placement of Fannie Mae and Freddie Mac into conservatorship by the federal government in 2008 and because securities issued by others that are collateralized by residential mortgage-backed securities issued by Fannie Mae or Freddie Mac are rated consistently as AAA rated securities. Market interest rate fluctuations can affect the prepayment speed of principal and the yield on the security. Premiums and discounts are amortized using the level yield or “interest method” over the terms of the securities. Declines in the fair value of held-to-maturity and available-for sale-securities below their cost that are deemed to be other than temporary are reflected in earnings as realized losses. In determining whether other-than-temporary impairment exists, management considers many factors, including (i) the length of time and the extent to which the fair value has been less than cost, (ii) the financial condition and near-term prospects of the issuer, and (iii) our intent to hold and our determination of whether we will more likely than not be required to sell the security prior to a recovery in fair value. If we determine that (i) we intend to sell the security or (ii) it is more likely than not that we will be required to sell the security before it’s anticipated recovery, the other-than-temporary impairment that is recognized in earnings is equal to the difference between the fair value of the security and our amortized cost of the security. If we determine that we (i) do not intend to sell the security and (ii) we will not be more likely than not required to sell the security before it’s anticipated recovery, the other-than-temporary impairment is segregated into its two components (i) the amount of impairment related to credit loss and (ii) the amount of impairment related to other factors. The difference between the present value of the cash flows expected to be collected and the amortized cost is the credit loss recognized through earnings and an adjustment to the cost basis of the security. The amount of impairment related to other factors is included in other comprehensive income (loss). Gains and losses on the sale of securities are recorded on the trade date and are determined using the specific identification method. Equity Securities Provision and Allowance for Credit Losses Our ACL is based on an expected credit loss model that recognizes credit losses over the life of a financial asset. Expected credit losses capture historical information, current conditions, and reasonable and supportable forecasts of future conditions. The ACL is deducted from the amortized cost of an instrument to present the net amount expected to be collected on the financial asset. Our ACL primarily consists of the aggregate ACL estimates of our Subsidiary Banks. The estimates are established through charges to operations in the form of charges to provisions for credit loss expense. Loan losses or recoveries are charged or credited directly to the ACL. The ACL of each Subsidiary Bank is maintained at a level considered appropriate by management, based on estimated current expected credit losses in the current loan portfolio, including information about past events, current conditions, and reasonable and supportable forecasts. Our management continually reviews the ACL of the Subsidiary Banks using the amounts determined from the estimates established on specific doubtful loans, the estimate established on quantitative historical loss percentages, and the estimate based on qualitative current conditions and reasonable and supportable two-year forecasted data. Our methodology reverts to the average lifetime loss-rate beyond the forecast period when we can no longer develop reasonable and supportable forecasts. Should any of the factors considered by management in evaluating the adequacy of the estimate for current expected credit losses change, our estimate of current expected credit losses could also change, which could affect the level of future credit loss expense. While the calculation of our ACL utilizes management’s best judgment and all information reasonably available, the adequacy of the ACL is dependent on a variety of factors beyond our control, including, among other things, the performance of the entire loan portfolio, the economy, government actions, changes in interest rates, and the view of regulatory authorities towards loan classifications. We believe that the allowance for probable loan losses is adequate. The Subsidiary Banks charge-off that portion of any loan which management considers to represent a loss as well as that portion of any other loan which is classified as a “loss” by bank examiners. Commercial, financial, and agricultural or real estate loans are generally considered by management to represent a loss, in whole or part, (i) when an exposure beyond any collateral coverage is apparent, (ii) when no further collection of the portion of the loan so exposed is anticipated based on actual results, (iii) when the credit enhancements, if any, are not adequate, and (iv) when the borrower’s financial condition would indicate so. Generally, unsecured consumer loans are charged-off when 90 days past due. Loans Loans are reported at the principal balance outstanding, net of unearned discounts. Interest income on loans is reported on an accrual basis. Loan fees and costs associated with originating the loans are accreted or amortized over the life of the loan using the interest method. We originate mortgage loans that may subsequently be sold to an unaffiliated third party. The loans are not securitized and if sold, are sold without recourse. Loans held for sale are carried at cost and the principal amount outstanding is not significant to the consolidated financial statements. Doubtful Loans Doubtful loans are those loans where it is probable that all amounts due according to contractual terms of the loan agreement will not be collected. Doubtful loans are measured based on (i) the present value of expected future cash flows discounted at the loan’s effective interest rate; (ii) the loan’s observable market price; or (iii) the fair value of the collateral if the loan is collateral dependent. Substantially all our doubtful loans are measured at the fair value of the collateral. In limited cases, we may use other methods to determine the level of impairment of a loan if such loan is not collateral dependent. Troubled Loan Modifications Non-Accrual Loans The non-accrual loan policy of our Subsidiary Banks is to discontinue the accrual of interest on loans when management determines that it is probable that future interest accruals will be un-collectible. As it relates to consumer loans, management charges-off those loans when the loan is contractually 90 days past due. Under special circumstances, a consumer or non-consumer loan may be more than 90 days delinquent as to interest or principal and not be placed on non-accrual status. This situation generally results when a Subsidiary Bank has a borrower who is experiencing financial difficulties, but not to the extent that requires a restructuring of indebtedness. The majority of this category is composed of loans that are considered to be adequately secured and/or for which there are expected future payments. When a loan is placed on non-accrual status, any interest accrued, not paid is reversed and charged to operations against interest income. As it relates to non-consumer loans that are not 90 days past due, management will evaluate each of these loans to determine if placing the loan on non-accrual status is warranted. Interest income on non-accrual loans is recognized only to the extent payments are received or when, in management’s opinion, the debtor’s financial condition warrants reestablishment of interest accruals. Other Real Estate Owned and Repossessed Assets Other real estate owned is comprised of real estate acquired by foreclosure and deeds in lieu of foreclosure. Other real estate is carried at the lower of the recorded investment in the property or its fair value less estimated costs to sell such property (as determined by independent appraisal). Prior to foreclosure, the value of the underlying loan is written down to the fair value of the real estate to be acquired by a charge to the ACL, if necessary. Any subsequent write-downs are charged against other non-interest expense through a valuation allowance. Other real estate owned totaled approximately $28,193,000 and $26,728,000 at December 31, 2024 and 2023, respectively. Other real estate owned is included in other assets. Repossessed assets consist primarily of non-real estate assets acquired by foreclosure. Prior to foreclosure, the value of the underlying loan is written down to the fair value of the asset to be repossessed by a charge to the ACL, if necessary. Repossessed assets are included in other assets on the consolidated financial statements and totaled approximately $358,000 and $236,000 at December 31, 2024 and 2023, respectively. Bank Premises and Equipment Bank premises and equipment are stated at cost less accumulated depreciation. Depreciation is computed on straight-line and accelerated methods over the estimated useful lives of the assets. Repairs and maintenance are charged to operations as incurred and expenditures for renewals and betterments are capitalized. We primarily own all the property we occupy, with the exception of certain branches operating in grocery store or retail shopping centers and certain ATM locations, which are all under operating leases as classified under guidance prior to the issuance of ASU 2016-02, “Leases (Topic 842).” Other Investments Other investments include equity investments in non-financial companies, as well as equity securities with no readily determinable fair market value. Equity investments are accounted for using the equity method of accounting. Due to timing issues in the accounting by some of the non-financial companies in which we hold an investment, activity recorded to our books is recorded one Revenue Recognition Income Taxes Deferred income tax assets and liabilities are determined using the asset and liability method. Under this method, the net deferred tax asset or liability is determined based on the tax effects of the differences between the book and tax basis of the various balance sheet assets and liabilities and gives current recognition to changes in tax rates and laws. We file a consolidated federal income tax return with our subsidiaries. Recognition of deferred tax assets is based on management’s assessment that the benefit related to certain temporary differences, tax operating loss carry forwards, and tax credits are more likely than not to be realized. A valuation allowance is recorded for the amount of the deferred tax items for which it is more likely than not that the tax benefits will not be realized. We evaluate uncertain tax positions at the end of each reporting period. We may recognize the tax benefit from an uncertain tax position only if it is more likely than not that the tax position will be sustained on examination by the taxing authorities, based on the technical merits of the position. The tax benefit recognized in the financial statements from any such a position is measured based on the largest benefit that has a greater than fifty percent likelihood of being realized upon ultimate settlement. As of December 31, 2024 and 2023, respectively, after evaluating all uncertain tax positions, we have recorded no liability for unrecognized tax benefits at the end of the reporting period. We would recognize any interest accrued on unrecognized tax benefits as other interest expense and penalties as other non-interest expense. During the years ended December 31, 2024, 2023, and 2022, we recognized no interest expense or penalties related to uncertain tax positions. We file consolidated tax returns in the U.S. federal jurisdiction and various state jurisdictions. We are no longer subject to U.S. federal or state income tax examinations by tax authorities for years before 2021. Stock Options and Stock Appreciation Rights Compensation expense for stock-based awards is based on the market price of the stock on the measurement date, which is generally the date of grant, and is recognized ratably over the service period of the award. The fair value of stock options and stock appreciation rights granted was estimated using a Black-Scholes-Merton pricing model. These models were developed for use in estimating the fair value of publicly traded options and stock appreciation rights that have no vesting restrictions and are fully transferable. Additionally, these models require the input of highly subjective assumptions. Because our employee stock options and stock appreciation rights have characteristics significantly different from those of publicly traded options and appreciation rights, and because changes in the subjective input assumptions can materially affect the fair value estimate, in management’s opinion, the Black-Scholes-Merton pricing models do not necessarily provide a reliable single measure of the fair value of our stock options and stock appreciation rights. Net Income Per Share Basic Earnings Per Share (“EPS”) is calculated by dividing net income by the weighted average number of common shares outstanding. The computation of diluted EPS assumes the issuance of common shares for all dilutive potential common shares outstanding during the reporting period. The dilutive effect of stock options is considered in earnings per share calculations, if dilutive, using the treasury stock method. Goodwill and Identified Intangible Assets Goodwill represents the excess of costs over fair value of assets of businesses acquired. Goodwill is tested for impairment at least annually or on an interim basis if an event triggering impairment may have occurred. As of October 1, 2024, after completing goodwill testing, we have determined that no goodwill impairment exists. There were no changes in the carrying amount of goodwill for the years ended December 31, 2024 and December 31, 2023. Identified intangible assets are acquired assets that lack physical substance but can be distinguished from goodwill because of contractual or other legal rights or because the asset is capable of being sold or exchanged either on its own or in combination with a related contract, asset, or liability. Impairment of Long-Lived Assets Long-lived assets, such as property, plant, and equipment, and purchased intangibles subject to amortization, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying value of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying value of the asset to the estimated undiscounted future cash flows expected to be generated by the asset. If the carrying value of an asset exceeds its estimated future cash flows, an impairment charge is recognized by the amount by which the carrying value of the asset exceeds the fair value of the asset. Assets to be disposed of would be separately presented in the statement of condition and reported at the lower of the carrying value or fair value less costs to sell and are no longer depreciated. The assets and liabilities of a disposed group classified as held for sale would be presented separately in the appropriate asset and liability sections of the statement of condition. Consolidated Statements of Cash Flows For purposes of the consolidated statements of cash flows, we consider all short-term investments with a maturity at date of purchase of three months or less to be cash equivalents. Also, we report transactions related to deposits and loans to customers on a net basis. Accounting for Transfers and Servicing of Financial Assets We account for transfers and servicing of financial assets and extinguishments of liabilities based on the application of a financial-components approach that focuses on control. After a transfer of financial assets, we recognize the financial and servicing assets we control and liabilities we have incurred, derecognize financial assets when control has been surrendered and derecognize liabilities when extinguished. We have retained mortgage servicing rights in connection with the sale of mortgage loans. Because we may not initially identify loans as originated for resale, all loans are initially treated as held for investment. The value of the mortgage servicing rights are reviewed periodically for impairment and are amortized in proportion to, and over the period of estimated net servicing income or net servicing losses. The value of the mortgage servicing rights is not significant to the consolidated statements of condition. Segments of an Enterprise and Related Information We operate as one segment, banking. The chief operating decision maker (“CODM”) is our chief executive officer. The operating information used by our CODM for purposes of assessing performance and making operating decisions is the consolidated financial statements presented in this report. We have five active operating subsidiaries, namely, the Subsidiary Banks. Our Subsidiary Banks offer all products and services on the same basis and on the same terms and operate in the same regulatory environment. We apply the provisions of ASC Topic 280, “Segment Reporting,” in determining our reportable segments and related disclosures. Comprehensive Income (Loss) Comprehensive income (loss) consists of net income and other comprehensive income (loss). Other comprehensive income (loss) includes unrealized gains and losses on securities available for sale. Advertising Advertising costs are expensed as incurred. Reclassifications Certain amounts in the prior year’s presentations have been reclassified to conform to the current presentation. These reclassifications had no effect on previously reported net income or shareholders’ equity. New Accounting Standards In March 2022, the FASB issued Accounting Standards Update No. 2022-02, Financial Instruments – Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures (“ASU 2022-02”). ASU 2022-02 eliminates the accounting guidance for troubled debt restructurings in existing guidance and enhances disclosure requirements for certain loan refinancings and restructurings when a borrower is experiencing financial difficulty. Additionally, ASU 2022-02 requires entities to disclose current period gross write-offs by year of origination for financing receivables and net investments in leases. We adopted the provisions of ASU 2022-02 on January 1, 2023 and it did not have a significant impact on our consolidated financial statements. date in which the SEC removal of the related disclosure from Regulation S-X or Regulation S-K, with early adoption prohibited. The adoption of ASU 2023-06 did not have a significant impact on our consolidated financial statements.

Investment Securities, Equity S

Investment Securities, Equity Securities with Readily Determinable Fair Values and Other Investments	12 Months Ended
	Dec. 31, 2024
Investment Securities, Equity Securities with Readily Determinable Fair Values and Other Investments
Investment Securities, Equity Securities with Readily Determinable Fair Values and Other Investments	(2) Investment Securities, Equity Securities with Readily Determinable Fair Values and Other Investments Available-for-sale and held-to-maturity debt securities in an unrealized loss position are evaluated for the underlying cause of the loss. In the event that the deterioration in value is attributable to credit related reasons, then the amount of credit-related impairment would be recorded as a charge to our ACL with subsequent changes in the amount of impairment, up or down, also recorded through our ACL. The exception to this process will occur if we intend to sell an impaired available-for-sale debt security or if we will more likely than not be required to sell a credit impaired available-for-sale debt security prior to the value recovering to the security’s amortized cost. In those situations, the entire credit-related impairment amount would be required to be recognized in earnings. We have evaluated the debt securities classified as available-for-sale and held-to-maturity at December 31, 2024 and December 31, 2023, and have determined that no debt securities in an unrealized loss position are arising from credit related reasons, and have therefore not recorded any allowances for debt securities in our ACL for the period. Unrealized gains and losses related to equity securities with readily determinable fair values are included in net income. The amortized cost and estimated fair value by type of investment security at December 31, 2024 are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Held to Maturity ​ ​ ​ ​ ​ ​ Gross ​ Gross ​ ​ ​ ​ ​ ​ ​ ​ ​ Amortized ​ unrealized ​ unrealized ​ Estimated ​ Carrying ​ ​ ​ cost ​ gains ​ losses ​ fair value ​ value ​ ​ ​ (Dollars in Thousands) ​ Other securities $ 4,400 $ — $ — $ 4,400 $ 4,400 ​ Total investment securities ​ $ 4,400 ​ $ — ​ $ — ​ $ 4,400 ​ $ 4,400 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Available for Sale Debt Securities ​ ​ ​ ​ ​ ​ Gross ​ Gross ​ ​ ​ ​ ​ ​ ​ ​ ​ Amortized ​ unrealized ​ unrealized ​ Estimated ​ Carrying ​ ​ ​ cost ​ gains ​ losses ​ fair value ​ value (1) ​ ​ ​ (Dollars in Thousands) ​ Residential mortgage-backed securities ​ $ 5,315,488 ​ $ 8,858 ​ $ (489,170) ​ $ 4,835,176 ​ $ 4,835,176 ​ Obligations of states and political subdivisions ​ 156,822 ​ 331 ​ (4,413) ​ 152,740 ​ 152,740 ​ Total investment securities ​ $ 5,472,310 ​ $ 9,189 ​ $ (493,583) ​ $ 4,987,916 ​ $ 4,987,916 ​ ​ (1) Included in the carrying value of residential mortgage- backed securities are $1,001,184 of mortgage-backed securities issued by Ginnie Mae and $3,833,992 of mortgage-backed securities issued by Fannie Mae and Freddie Mac The amortized cost and estimated fair value of investment securities at December 31, 2024, by contractual maturity, are shown below. Expected maturities will differ from contractual maturities because borrowers may have the right to prepay obligations with or without prepayment penalties. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Held to Maturity ​ Available for Sale ​ ​ ​ Amortized ​ Estimated ​ Amortized ​ Estimated ​ ​ ​ Cost ​ fair value ​ Cost ​ fair value ​ ​ ​ (Dollars in Thousands) ​ Due in one year or less $ 1,325 $ 1,325 $ — $ — ​ Due after one year through five years ​ 3,075 ​ 3,075 ​ — ​ ​ — ​ Due after five years through ten years ​ — ​ — ​ 1,442 ​ 1,438 ​ Due after ten years ​ — ​ — ​ 155,380 ​ 151,302 ​ Residential mortgage-backed securities ​ — ​ — ​ 5,315,488 ​ 4,835,176 ​ Total investment securities ​ $ 4,400 ​ $ 4,400 ​ $ 5,472,310 ​ $ 4,987,916 ​ ​ The amortized cost and estimated fair value by type of investment security at December 31, 2023 are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Held to Maturity ​ ​ ​ ​ ​ ​ Gross ​ Gross ​ ​ ​ ​ ​ ​ ​ ​ ​ Amortized ​ unrealized ​ unrealized ​ Estimated ​ Carrying ​ ​ ​ cost ​ gains ​ losses ​ fair value ​ value ​ ​ ​ (Dollars in Thousands) ​ Other securities $ 3,400 $ — $ — $ 3,400 $ 3,400 ​ Total investment securities ​ $ 3,400 ​ $ — ​ $ — ​ $ 3,400 ​ $ 3,400 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Available for Sale ​ ​ ​ ​ ​ ​ Gross ​ Gross ​ Estimated ​ ​ ​ ​ ​ ​ Amortized ​ unrealized ​ unrealized ​ fair ​ Carrying ​ ​ ​ cost ​ gains ​ losses ​ value ​ value (1) ​ ​ ​ (Dollars in Thousands) ​ Residential mortgage-backed securities $ 5,169,813 ​ $ 9,541 ​ $ (519,255) ​ 4,660,099 ​ 4,660,099 ​ Obligations of states and political subdivisions ​ 161,001 ​ 1,602 ​ (361) ​ 162,242 ​ 162,242 ​ Total investment securities ​ $ 5,330,814 ​ $ 11,143 ​ $ (519,616) ​ $ 4,822,341 ​ $ 4,822,341 ​ (1) Included in the carrying value of residential mortgage- backed securities are $959,421 of mortgage-backed securities issued by Ginnie Mae, $3,700,678 of mortgage-backed securities issued by Fannie Mae and Freddie Mac Residential mortgage-backed securities are securities issued by Freddie Mac, Fannie Mae, Ginnie Mae or non-government entities. Investments in residential mortgage-backed securities issued by Ginnie Mae are fully guaranteed by the U.S. government. Investments in mortgage-backed securities issued by Freddie Mac and Fannie Mae are not fully guaranteed by the U.S. government; however, we believe that the quality of the bonds is similar to other AAA rated bonds with limited credit risk, particularly given the placement of Fannie Mae and Freddie Mac into conservatorship by the federal government in early September 2008 and because securities issued by others that are collateralized by residential mortgage-backed securities issued by Fannie Mae and Freddie Mac are rated consistently as AAA rated securities. The amortized cost and fair value of available for sale investment securities pledged to qualify for fiduciary powers, to secure public monies as required by law, repurchase agreements and short-term fixed borrowings was $1,896,183,000 and $1,646,971,000, respectively, at December 31, 2024. Proceeds from the sale and call of securities available-for-sale were $3,750,000, $2,045,000, and $800,000 during 2024, 2023 and 2022, respectively, which amounts included $0, $0 and $0 of mortgage-backed securities. Gross gains of $0, $0 and $0, and gross losses of $1,000, $3,000 and $0 were realized on the sales and calls in 2024, 2023 and 2022, respectively. Gross unrealized losses on investment securities and the fair value of the related securities, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at December 31, 2024 were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Less than 12 months ​ 12 months or more ​ Total ​ ​ ​ ​ ​ ​ Unrealized ​ ​ ​ ​ Unrealized ​ ​ ​ ​ Unrealized ​ ​ ​ Fair Value ​ Losses ​ Fair Value ​ Losses ​ Fair Value ​ Losses ​ ​ ​ (Dollars in Thousands) ​ Available for sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential mortgage-backed securities $ 544,375 $ (4,126) $ 3,358,586 $ (485,044) $ 3,902,961 $ (489,170) ​ Obligations of states and political subdivisions ​ 66,450 ​ (2,389) ​ 57,551 ​ (2,024) ​ 124,001 ​ (4,413) ​ ​ ​ $ 610,825 ​ $ (6,515) ​ $ 3,416,137 ​ $ (487,068) ​ $ 4,026,962 ​ $ (493,583) ​ ​ Gross unrealized losses on investment securities and the fair value of the related securities, aggregated by investment category and length of time that individual securities have been in a continuous loss position, at December 31, 2023 were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Less than 12 months ​ 12 months or more ​ Total ​ ​ ​ ​ ​ Unrealized ​ ​ ​ ​ Unrealized ​ ​ ​ ​ Unrealized ​ ​ Fair Value ​ Losses ​ Fair Value ​ Losses ​ Fair Value ​ Losses ​ ​ (Dollars in Thousands) Available for sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential mortgage-backed securities $ 577,448 $ (8,267) $ 3,456,349 $ (510,988) $ 4,033,797 $ (519,255) Obligations of states and political subdivisions ​ 651 ​ (1) ​ 64,373 ​ (360) ​ 65,024 ​ (361) ​ ​ $ 578,099 ​ $ (8,268) ​ $ 3,520,722 ​ $ (511,348) ​ $ 4,098,821 ​ $ (519,616) ​ The unrealized losses on investments in residential mortgage-backed securities are primarily caused by changes in market interest rates. We have no intent to sell and more likely than not be required to sell before a market price recovery or maturity of the securities; therefore, it is our conclusion that the investments in residential mortgage-backed securities issued by Freddie Mac, Fannie Mae, and Ginnie Mae are not considered other-than-temporarily impaired. realized gains and losses recognized in net income on equity securities for the twelve months ended December 31, 2024, 2023, and 2022: ​ ​ ​ ​ ​ ​ ​ ​ Year Ended ​ ​ December 31, 2024 ​ ​ (Dollars in Thousands) ​ ​ ​ Net losses recognized during the period on equity securities $ ​ (24) Less: Net gains and (losses) recognized during the period on equity securities sold during the period ​ ​ — ​ ​ ​ ​ ​ Unrealized losses recognized during the reporting period on equity securities still held at the reporting date ​ $ ​ (24) ​ ​ ​ ​ ​ ​ ​ ​ Year Ended ​ ​ December 31, 2023 ​ ​ (Dollars in Thousands) ​ ​ ​ Net gains recognized during the period on equity securities $ ​ 59 Less: Net gains and (losses) recognized during the period on equity securities sold during the period ​ ​ — ​ ​ ​ ​ ​ Unrealized gains recognized during the reporting period on equity securities still held at the reporting date ​ $ ​ 59 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended ​ ​ December 31, 2022 ​ ​ (Dollars in Thousands) ​ ​ ​ Net losses recognized during the period on equity securities $ ​ (721) Less: Net gains and (losses) recognized during the period on equity securities sold during the period ​ ​ — ​ ​ ​ ​ ​ Unrealized losses recognized during the reporting period on equity securities still held at the reporting date ​ $ ​ (721) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ twelve twelve

Loans

Loans	12 Months Ended
	Dec. 31, 2024
Loans
Loans	(3) Loans A summary of loans, by loan type at December 31, 2024 and 2023 is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ December 31, ​ ​ ​ 2024 ​ 2023 ​ ​ ​ (Dollars in Thousands) ​ Commercial, financial and agricultural $ 5,089,721 $ 4,802,622 ​ Real estate - mortgage ​ 999,313 ​ 938,901 ​ Real estate - construction ​ 2,484,454 ​ 2,091,622 ​ Consumer ​ 49,777 ​ 45,121 ​ Foreign ​ 186,561 ​ 180,695 ​ Total loans ​ $ 8,809,826 ​ $ 8,058,961 ​ ​

Allowance for Credit Losses

Allowance for Credit Losses	12 Months Ended
	Dec. 31, 2024
Allowance for Credit Losses
Allowance for Credit Losses	(4) Allowance for Credit Losses We adopted the provisions of ASU 2016-13, Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments on January 1, 2020 on a modified retrospective basis. Results and information regarding our ACL included in this Note are calculated and presented in accordance with that accounting standards update. ​ ASU 2016-13 replaces the long-standing incurred-loss model with a current expected credit loss model (“CECL”) that recognizes credit losses over the life of a financial asset. Using the CECL methodology, expected credit losses capture historical information, current conditions, and reasonable and supportable forecasts of future conditions. The ACL is deducted from the amortized cost of an instrument to present the net amount expected to be collected on the financial asset. Our ACL primarily consists of the aggregate ACL estimates of our Subsidiary Banks. The estimates are established through charges to operations in the form of charges to provisions for credit loss expense. Loan losses or recoveries are charged or credited directly to the ACL. The ACL of each Subsidiary Bank is maintained at a level considered appropriate by management, based on estimated current expected credit losses in the current loan portfolio, including information about past events, current conditions, and reasonable and supportable forecasts. ​ The estimation of the ACL is based on a loss-rate methodology that measures lifetime losses on loan pools that have similar risk characteristics. Loans that do not have similar risk characteristics are evaluated on an individual basis. The segmentation of the loan portfolio into pools requires a balancing process between capturing similar risk characteristics and containing sufficient loss history to provide meaningful results. Our segmentation starts at the general loan category with further sub-segmentation based on collateral types that may be of meaningful size and/or may contain sufficient differences in risk characteristics based on management’s judgement that would warrant further segmentation. The general loan categories along with primary risk characteristics used in our calculation are as follows: Commercial and industrial loans. Construction and land development loans. Commercial real estate loans. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2024 ​ ​ December 31, 2023 ​ ​ ​ (Dollars in Thousands) ​ ​ (Dollars in Thousands) ​ ​ ​ Amount ​ Percent of Total ​ ​ Amount ​ Percent of Total ​ Commercial real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial real estate construction development ​ $ 1,313,984 ​ ​ 23.0 % ​ $ 1,035,936 ​ ​ 19.6 % Hotel ​ 1,080,706 ​ 18.9 ​ ​ 1,116,539 ​ 21.1 ​ Retail multi-tenant ​ 738,874 ​ 12.9 ​ ​ 699,145 ​ 13.2 ​ Lot development: residential and commercial lots ​ 513,760 ​ 9.0 ​ ​ 548,797 ​ 10.4 ​ Warehouse ​ 435,783 ​ 7.6 ​ ​ 355,635 ​ 6.7 ​ Office/Professional buildings ​ 416,014 ​ 7.3 ​ ​ 311,413 ​ 5.9 ​ 1 - 4 family construction ​ ​ 338,832 ​ ​ 5.9 ​ ​ ​ 329,828 ​ ​ 6.2 ​ Multi-family ​ ​ 310,115 ​ ​ 5.4 ​ ​ ​ 380,839 ​ ​ 7.2 ​ Owner occupied real estate ​ ​ 270,584 ​ ​ 4.7 ​ ​ ​ 246,797 ​ ​ 4.7 ​ Commercial leased properties ​ ​ 194,023 ​ ​ 3.4 ​ ​ ​ 167,539 ​ ​ 3.2 ​ Farmland ​ ​ 109,697 ​ ​ 1.9 ​ ​ ​ 97,812 ​ ​ 1.8 ​ Total commercial real estate ​ $ 5,722,372 ​ $ 100.0 % ​ $ 5,290,280 ​ $ 100.0 % ​ 1-4 family mortgages. ​ Consumer loans. ​ The loan pools are further broken down using a risk-based segmentation based on internal classifications for commercial loans and past due status for consumer mortgage loans. Non-mortgage consumer loans are evaluated as one segment. On a weekly basis, commercial loan past due reports are reviewed by the credit quality committee to determine if a loan has any potential problems and if a loan should be placed on our internal Watch List report. Additionally, our credit department reviews the majority of our loans for proper internal classification purposes regardless of whether they are past due and segregates any loans with potential problems for further review. The credit department will discuss the potential problem loans with the servicing loan officers to determine any relevant issues that were not discovered in the evaluation. Also, an analysis of loans that is provided through examinations by regulatory authorities is considered in the review process. After the above analysis is completed, we will determine if a loan should be placed on an internal Watch List report because of issues related to the analysis of the credit, credit documents, collateral, and/or payment history. Our internal Watch List report is segregated into the following categories: (i) Pass, (ii) Economic Monitoring, (iii) Special Review, (iv) Watch List—Pass, (v) Watch List—Substandard, and (vi) Watch List—Doubtful. Loans placed in the Economic Monitoring or Special Review categories reflect our opinion that the loans have potential weaknesses that require monitoring on a more frequent basis. Credits in those categories are reviewed and discussed on a regular basis with the credit department and the lending staff to determine if a change in category is warranted. Loans placed in the Watch List—Pass category reflect our opinion that the credit contains weaknesses that represent a greater degree of risk, which warrants “extra attention.” Credits placed in this category are reviewed and discussed on a regular basis with the credit department and the lending staff to determine if a change in category is warranted. Loans placed in the Watch List—Substandard category are considered to be potentially inadequately protected by the current sound worth and debt service capacity of the borrower or of any pledged collateral. Those credit obligations, even if apparently protected by collateral value, have shown defined weaknesses related to adverse financial, managerial, economic, market, or political conditions which may jeopardize repayment of principal under contractual terms. Furthermore, there is a possibility that we may sustain some future loss if such weaknesses are not corrected. Loans placed in the Watch List—Doubtful category have shown defined weaknesses and reflect our belief that it is likely, based on current information and events, that we will be unable to collect all principal and/or interest amounts contractually due. Loans placed in the Watch List—Doubtful category are placed on non-accrual when they are moved to that category. For the purposes of the ACL, in order to maintain segments with sufficient history for meaningful results, the credits in the Pass and Economic Monitoring categories are aggregated, the credits in the Special Review and Watch List—Pass category are aggregated, and the credits in the Watch List—Substandard category remain in their own segment. For loans classified as Watch List—Doubtful, management evaluates these credits in accordance FASB ASC Subtopic 326-20, “Financial Instruments – Credit Losses – Measured at Amortized Cost,” and, if deemed necessary, a specific reserve is allocated to the loan. The analysis of the specific reserve is based on a variety of factors, including the borrower’s ability to pay, the economic conditions impacting the borrower’s industry and any collateral deficiency. If it is a collateral-dependent loan, the net realizable fair value of collateral will be evaluated for any deficiencies. Substantially all of our loans evaluated as Watch List – Doubtful are measured using the fair value of collateral method. In rare cases, we may use other methods to determine the specific reserve of a loan if such loan is not collateral dependent. Within each collectively evaluated pool, the robustness of the lifetime historical loss-rate is evaluated and, if needed, is supplemented with peer loss rates through a model risk adjustment. Certain qualitative loss factors are then evaluated to incorporate management’s two-year reasonable and supportable forecast period followed by a reversion to the pool’s average lifetime loss-rate. Those qualitative loss factors are: (i) trends in portfolio volume and composition, (ii) volume and trends in classified loans, delinquencies and non-accruals, (iii) concentration risk, (iv) trends in underlying collateral value, (v) changes in policies, procedures, and strategies, and (vi) economic conditions. Qualitative factors also include potential losses stemming from operational risk factors arising from fraud, natural disasters, pandemics, geopolitical events and large loans. The large loan operational risk factor was added beginning in the second quarter of 2023. Because of the magnitude of large loans, they pose a higher risk of default. Recognizing this risk and establishing an operational risk factor to capture that risk, is prudent action in the current economic environment. Large loans are usually part of a larger relationship with collateral that is pledged across the relationship. Defaulting on a larger loan may therefore jeopardize an entire collateral relationship. The current economic environment has created challenges for borrowers to service their debt. Increasing cap rates, elevated office vacancies, an upward trend in apartment vacancies and significant increases in interest rates are all contributing to the elevated risk in large loans. Should any of the factors considered by management in evaluating the adequacy of the ACL change, our estimate could also change, which could affect the level of future credit loss expense. We have elected to not measure an ACL for accrued interest receivable given our timely approach in identifying and writing off uncollectible accrued interest. An ACL for off-balance sheet exposure is derived from a projected usage rate of any unfunded commitment multiplied by the historical loss rate, plus model risk adjustment, if any, of the on-balance sheet loan pools. Our management continually reviews the ACL of the Subsidiary Banks using the amounts determined from the estimates established on specific doubtful loans, the estimate established on quantitative historical loss percentages, and the estimate based on qualitative current conditions and reasonable and supportable two-year forecasted data. Our methodology reverts to the average lifetime loss-rate beyond the forecast period when we can no longer develop reasonable and supportable forecasts. Should any of the factors considered by management in evaluating the adequacy of the estimate for current expected credit losses change, our estimate of current expected credit losses could also change, which could affect the level of future credit loss expense. While the calculation of our ACL utilizes management’s best judgment and all information reasonably available, the adequacy of the ACL is dependent on a variety of factors beyond our control, including, among other things, the performance of the entire loan portfolio, the economy, government actions, changes in interest rates, and the view of regulatory authorities towards loan classifications. A summary of the changes in the allowance for probable loan losses by loan class is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2024 ​ ​ Domestic ​ Foreign ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ other Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ construction & real estate: ​ Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ land ​ farmland & ​ real estate: ​ Residential: ​ Residential: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ development ​ commercial ​ multifamily ​ first lien ​ junior lien ​ Consumer ​ Foreign ​ Total ​ ​ (Dollars in Thousands) ​ Balance at December 31, 2023 $ 35,550 ​ $ 55,291 ​ $ 42,703 ​ $ 5,088 ​ $ 5,812 ​ $ 11,024 ​ $ 318 ​ $ 1,283 ​ $ 157,069 ​ Losses charged to allowance ​ (34,149) ​ (2,228) ​ ​ — ​ — ​ (46) ​ — ​ (185) ​ — ​ (36,608) ​ Recoveries credited to allowance ​ 4,079 ​ — ​ 20 ​ — ​ 38 ​ 123 ​ 13 ​ 1 ​ 4,274 ​ Net losses charged to allowance ​ (30,070) ​ (2,228) ​ 20 ​ — ​ (8) ​ 123 ​ (172) ​ 1 ​ (32,334) ​ Provision (credit) charged to operations ​ 24,373 ​ ​ 7,576 ​ 1,267 ​ (219) ​ (276) ​ (1,116) ​ 135 ​ 62 ​ 31,802 ​ Balance at December 31, 2024 ​ $ 29,853 ​ $ 60,639 ​ $ 43,990 ​ $ 4,869 ​ $ 5,528 ​ $ 10,031 ​ $ 281 ​ $ 1,346 ​ $ 156,537 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2023 ​ ​ Domestic ​ Foreign ​ ​ ​ ​ ​ ​ ​ Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ other Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ construction & real estate: ​ Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ land ​ farmland & ​ real estate: ​ Residential: ​ Residential: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial development ​ commercial ​ multifamily ​ first lien ​ junior lien ​ Consumer ​ Foreign ​ Total ​ ​ (Dollars in Thousands) ​ Balance at December 31, 2022 $ 26,728 ​ $ 44,684 ​ $ 36,474 ​ $ 3,794 ​ $ 4,759 ​ $ 8,284 ​ $ 281 ​ $ 968 $ 125,972 ​ Losses charged to allowance ​ (9,664) ​ — ​ ​ — ​ — ​ (43) ​ (298) ​ (179) ​ — ​ (10,184) ​ Recoveries credited to allowance ​ 5,433 ​ 837 ​ 143 ​ — ​ 16 ​ 260 ​ 16 ​ — ​ 6,705 ​ Net losses charged to allowance ​ (4,231) ​ 837 ​ 143 ​ — ​ (27) ​ (38) ​ (163) ​ — ​ (3,479) ​ Provision (credit) charged to operations ​ 13,053 ​ ​ 9,770 ​ 6,086 ​ 1,294 ​ 1,080 ​ 2,778 ​ 200 ​ 315 ​ 34,576 ​ Balance at December 31, 2023 ​ $ 35,550 ​ $ 55,291 ​ $ 42,703 ​ $ 5,088 ​ $ 5,812 ​ $ 11,024 ​ $ 318 ​ $ 1,283 ​ $ 157,069 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2022 ​ ​ Domestic ​ Foreign ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ other Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ construction & real estate: ​ Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ land ​ farmland & ​ real estate: ​ Residential: ​ Residential: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial development ​ commercial ​ multifamily ​ first lien ​ junior lien ​ Consumer ​ Foreign ​ Total ​ (Dollars in Thousands) Balance at December 31, 2021 $ 23,178 ​ $ 35,390 ​ $ 35,654 ​ $ 3,291 ​ $ 4,073 ​ $ 7,754 ​ $ 272 ​ $ 762 $ 110,374 ​ Losses charged to allowance ​ (9,050) ​ (2) ​ ​ (16) ​ — ​ (160) ​ (28) ​ (223) ​ — ​ (9,479) ​ Recoveries credited to allowance ​ 2,894 ​ 123 ​ 27 ​ — ​ 240 ​ 104 ​ 38 ​ — ​ 3,426 ​ Net losses charged to allowance ​ (6,156) ​ 121 ​ 11 ​ — ​ 80 ​ 76 ​ (185) ​ — ​ (6,053) ​ Provision (credit) charged to operations ​ 9,706 ​ ​ 9,173 ​ 809 ​ 503 ​ 606 ​ 454 ​ 194 ​ 206 ​ 21,651 ​ Balance at December 31, 2022 ​ $ 26,728 ​ $ 44,684 ​ $ 36,474 ​ $ 3,794 ​ $ 4,759 ​ $ 8,284 ​ $ 281 ​ $ 968 ​ $ 125,972 ​ ​ The table below provides additional information on the balance of loans individually or collectively evaluated for impairment and their related allowance, by loan class: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2024 ​ ​ ​ Loans Individually ​ Loans Collectively ​ ​ ​ Evaluated For ​ Evaluated For ​ ​ ​ Impairment ​ Impairment ​ ​ ​ Recorded ​ ​ ​ ​ Recorded ​ ​ ​ ​ ​ ​ Investment ​ Allowance ​ Investment ​ Allowance ​ ​ ​ (Dollars in Thousands) ​ Domestic ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial $ 52,110 $ 400 $ 1,799,693 $ 29,453 ​ Commercial real estate: other construction & land development ​ 8,195 ​ 8,122 ​ 2,476,259 ​ 52,517 ​ Commercial real estate: farmland & commercial ​ 65,733 ​ 8,228 ​ 2,862,070 ​ 35,762 ​ Commercial real estate: multifamily ​ 42,964 ​ 1,882 ​ 267,151 ​ 2,987 ​ Residential: first lien ​ 45 ​ — ​ 530,039 ​ 5,528 ​ Residential: junior lien ​ 141 ​ — ​ 469,088 ​ 10,031 ​ Consumer ​ — ​ — ​ 49,777 ​ 281 ​ Foreign ​ — ​ — ​ 186,561 ​ 1,346 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 169,188 ​ $ 18,632 ​ $ 8,640,638 ​ $ 137,905 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2023 ​ ​ ​ Loans Individually ​ Loans Collectively ​ ​ ​ Evaluated For ​ Evaluated For ​ ​ ​ Impairment ​ Impairment ​ ​ ​ Recorded ​ ​ ​ ​ Recorded ​ ​ ​ ​ ​ ​ Investment ​ Allowance ​ Investment ​ Allowance ​ ​ ​ (Dollars in Thousands) ​ Domestic ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial $ 30,872 $ 7,971 $ 1,597,358 $ 27,579 ​ Commercial real estate: other construction & land development ​ 15,701 ​ 4,320 ​ 2,075,921 ​ 50,971 ​ Commercial real estate: farmland & commercial ​ 299 ​ — ​ 2,793,254 ​ 42,703 ​ Commercial real estate: multifamily ​ 96 ​ — ​ 380,743 ​ 5,088 ​ Residential: first lien ​ 93 ​ — ​ 477,940 ​ 5,812 ​ Residential: junior lien ​ — ​ — ​ 460,868 ​ 11,024 ​ Consumer ​ — ​ — ​ 45,121 ​ 318 ​ Foreign ​ — ​ — ​ 180,695 ​ 1,283 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 47,061 ​ $ 12,291 ​ $ 8,011,900 ​ $ 144,778 ​ ​ The increase in Commercial loans individually evaluated for impairment at December 31, 2024 compared to December 31, 2023 can be attributed to two loans secured by commercial properties that were placed on non-accrual in the fourth quarter of 2024. The increase in commercial real estate: farmland & commercial loans individually evaluated for impairment at December 31, 2024 compared to December 31, 2023 can be attributed to one relationship secured by commercial buildings in which childcare centers are operated. The increase in Commercial real estate: multifamily loans can be attributed to two loans secured by apartments that were placed on non-accrual in the third quarter of 2024. Loans accounted for on a non-accrual basis at December 31, 2024, 2023 and 2022 amounted to $169,136,000, $47,170,000, and $51,648,000, respectively. The effect of such non-accrual loans reduced interest income by approximately $12,661,000, $6,614,000, and $116,000 for the years ended December 31, 2024, 2023, and 2022, respectively. Amounts received on non-accruals are applied, for financial accounting purposes, first to principal and then to interest after all principal has been collected. Accruing loans contractually past due 90 days or more as to principal or interest payments at December 31, 2024, 2023, and 2022 amounted to approximately $6,693,000, $5,597,000, and $6,132,000, respectively. The table below provides additional information on loans accounted for on a non-accrual basis by loan class: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2024 ​ December 31, 2023 ​ ​ ​ (Dollars in Thousands) ​ ​ ​ ​ Total Non-Accrual Loans ​ Non-Accrual Loans with No Credit Allowance ​ Total Non-Accrual Loans ​ Non-Accrual Loans with No Credit Allowance ​ Domestic ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial $ 52,110 ​ $ 51,276 ​ $ 30,872 ​ $ 122 ​ Commercial real estate: other construction & land development ​ 8,195 ​ 73 ​ 15,701 ​ 5,400 ​ Commercial real estate: farmland & commercial ​ 65,733 ​ 24,757 ​ 299 ​ 211 ​ Commercial real estate: multifamily ​ 42,964 ​ 73 ​ 96 ​ 96 ​ Residential: first lien ​ 134 ​ 134 ​ 202 ​ 172 ​ Total non-accrual loans ​ $ 169,136 ​ $ 76,313 ​ $ 47,170 ​ $ 6,001 ​ ​ Doubtful loans are those loans where it is probable that all amounts due according to contractual terms of the loan agreement will not be collected. We have identified these loans through our normal loan review procedures. Doubtful loans are measured based on (i) the present value of expected future cash flows discounted at the loan’s effective interest rate; (ii) the loan’s observable market price; or (iii) the fair value of the collateral if the loan is collateral dependent. Substantially all of our doubtful loans are measured at the fair value of the collateral. In limited cases, we may use other methods to determine the level of impairment of a loan if such loan is not collateral dependent. ​ ​ While management considers that it is generally able to identify borrowers with financial problems reasonably early and to monitor credit extended to such borrowers carefully, there is no precise method of predicting loan losses. The determination that a loan is likely to be uncollectible and that it should be wholly or partially charged-off as a loss is an exercise of judgment. Similarly, the determination of the adequacy of the ACL (formerly allowance for probable loan losses) can be made only on a subjective basis. It is the judgment of our management that the ACL at December 31, 2024 and December 31, 2023, was adequate to absorb expected losses from loans in the portfolio at that date. The following table presents information regarding the aging of past due loans by loan class: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2024 ​ ​ ​ ​ ​ ​ ​ ​ ​ 90 Days or Total ​ ​ ​ ​ ​ ​ ​ 30 - 59 ​ 60 - 89 ​ 90 Days or ​ greater & ​ Past ​ ​ ​ ​ Total ​ ​ ​ Days ​ Days ​ Greater ​ still accruing ​ Due ​ Current ​ Portfolio ​ ​ ​ (Dollars in Thousands) ​ Domestic ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial $ 4,070 $ 51,577 $ 579 $ 534 $ 56,226 $ 1,795,577 $ 1,851,803 ​ Commercial real estate: other construction & land development ​ 2,421 ​ 15 ​ 8,122 ​ — ​ 10,558 ​ 2,473,896 ​ 2,484,454 ​ Commercial real estate: farmland & commercial ​ 1,221 ​ — ​ 26,416 ​ 262 ​ 27,637 ​ 2,900,166 ​ 2,927,803 ​ Commercial real estate: multifamily ​ — ​ 270 ​ 25,064 ​ — ​ 25,334 ​ 284,781 ​ 310,115 ​ Residential: first lien ​ 4,763 ​ 1,337 ​ 3,631 ​ 3,542 ​ 9,731 ​ 520,353 ​ 530,084 ​ Residential: junior lien ​ 2,599 ​ 1,544 ​ 2,000 ​ 2,000 ​ 6,143 ​ 463,086 ​ 469,229 ​ Consumer ​ 122 ​ 32 ​ 16 ​ 16 ​ 170 ​ 49,607 ​ 49,777 ​ Foreign ​ 816 ​ 1,992 ​ 339 ​ 339 ​ 3,147 ​ 183,414 ​ 186,561 ​ Total past due loans ​ $ 16,012 ​ $ 56,767 ​ $ 66,167 ​ $ 6,693 ​ $ 138,946 ​ $ 8,670,880 ​ $ 8,809,826 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 90 Days or ​ Total ​ ​ ​ ​ ​ ​ ​ ​ ​ 30 - 59 ​ 60 - 89 ​ 90 Days or ​ greater & ​ Past ​ ​ ​ ​ Total ​ ​ ​ Days ​ Days ​ Greater ​ still accruing ​ Due ​ Current ​ Portfolio ​ ​ ​ (Dollars in Thousands) ​ Domestic ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ $ 2,387 $ 1,583 $ 30,238 $ 539 $ 34,208 $ 1,594,022 $ 1,628,230 ​ Commercial real estate: other construction & land development ​ 3,460 ​ — ​ 10,245 ​ — ​ 13,705 ​ 2,077,917 ​ 2,091,622 ​ Commercial real estate: farmland & commercial ​ 1,424 ​ 371 ​ 93 ​ 4 ​ 1,888 ​ 2,791,665 ​ 2,793,553 ​ Commercial real estate: multifamily ​ 369 ​ 330 ​ — ​ — ​ 699 ​ 380,140 ​ 380,839 ​ Residential: first lien ​ 1,812 ​ 1,439 ​ 2,545 ​ 2,437 ​ 5,796 ​ 472,236 ​ 478,032 ​ Residential: junior lien ​ 1,273 ​ 613 ​ 1,701 ​ 1,701 ​ 3,587 ​ 457,282 ​ 460,869 ​ Consumer ​ 263 ​ 11 ​ 27 ​ 27 ​ 301 ​ 44,820 ​ 45,121 ​ Foreign ​ 1,884 ​ 848 ​ 889 ​ 889 ​ 3,621 ​ 177,074 ​ 180,695 ​ Total past due loans ​ $ 12,872 ​ $ 5,195 ​ $ 45,738 ​ $ 5,597 ​ $ 63,805 ​ $ 7,995,156 ​ $ 8,058,961 ​ ​ The increase in Commercial loans past due 60 - 89 days or greater at December 31, 2024 can be primarily attributed to two loans secured by commercial properties that were placed on non-accrual in the fourth quarter of 2024. The decrease in Commercial loans past due 90 days or greater at December 31, 2024 can be attributed to a loan secured by equipment and pipeline infrastructure used in the oil and gas industry and oil and gas production that was charged-down in the first quarter of 2024. The increase in Commercial real estate: farmland and commercial loans past due 90 days or greater at December 3, 2024 can be attributed to two loans, one is a hotel and one is a commercial building, both of which are on non-accrual at December 31, 2024. The increase in Commercial real estate: multifamily loans at December 31, 2024 can be attributed to a loan secured by apartments that is on non-accrual at December 31, 2024. Our internal classified report is segregated into the following categories: (i) “Special Review Credits,” (ii) “Watch List—Pass Credits,” or (iii) “Watch List—Substandard Credits.” The loans placed in the “Special Review Credits” category reflect our opinion that the loans reflect potential weakness which require monitoring on a more frequent basis. The “Special Review Credits” are reviewed and discussed on a regular basis with the credit department and the lending staff to determine if a change in category is warranted. The loans placed in the “Watch List—Pass Credits” category reflect our opinion that the credit contains weaknesses which represent a greater degree of risk, which warrant “extra attention.” The “Watch List—Pass Credits” are reviewed and discussed on a regular basis with the credit department and the lending staff to determine if a change in category is warranted. The loans placed in the “Watch List—Substandard Credits” classification are considered to be potentially inadequately protected by the current sound worth and debt service capacity of the borrower or of any pledged collateral. These credit obligations, even if apparently protected by collateral value, have shown defined weaknesses related to adverse financial, managerial, economic, market, or political conditions which may jeopardize repayment of principal and interest. Furthermore, there is the possibility that we could sustain some future loss if such weaknesses are not corrected. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2024 2023 2022 2021 2020 Prior Total ​ ​ ​ (Dollars in Thousands) ​ Balance at December 31, 2024 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Domestic ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 993,045 ​ $ 343,212 ​ $ 135,057 ​ $ 214,702 ​ $ 37,670 ​ $ 63,030 ​ $ 1,786,716 ​ Watch List - Pass ​ ​ — ​ ​ 11,113 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 11,113 ​ Watch List - Substandard ​ ​ 1,341 ​ ​ 327 ​ ​ 74 ​ ​ 122 ​ ​ — ​ ​ — ​ ​ 1,864 ​ Watch List - Doubtful ​ ​ 881 ​ ​ 51,184 ​ ​ 45 ​ ​ — ​ ​ — ​ ​ — ​ ​ 52,110 ​ Total Commercial ​ $ 995,267 ​ $ 405,836 ​ $ 135,176 ​ $ 214,824 ​ $ 37,670 ​ $ 63,030 ​ $ 1,851,803 ​ Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross writeoffs ​ $ 5,711 ​ $ 2,689 ​ $ 25,686 ​ $ 44 ​ $ 14 ​ $ 5 ​ $ 34,149 ​ Commercial real estate: other construction & land development ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 1,029,399 ​ $ 921,180 ​ $ 322,348 ​ $ 144,221 ​ $ 39,908 ​ $ 2,925 ​ $ 2,459,981 ​ Special Review ​ ​ — ​ ​ 16,000 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 16,000 ​ Watch List - Substandard ​ ​ 278 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 278 ​ Watch List - Doubtful ​ ​ 73 ​ ​ — ​ ​ 8,122 ​ ​ — ​ ​ — ​ ​ — ​ ​ 8,195 ​ Total Commercial real estate: other construction & land development ​ $ 1,029,750 ​ $ 937,180 ​ $ 330,470 ​ $ 144,221 ​ $ 39,908 ​ $ 2,925 ​ $ 2,484,454 ​ Commercial real estate: other construction & land development ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross writeoffs ​ $ — ​ $ 1,146 ​ $ 1,082 ​ $ — ​ $ — ​ $ — ​ $ 2,228 ​ Commercial real estate: farmland & commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 814,273 ​ $ 631,806 ​ $ 531,035 ​ $ 312,757 ​ $ 220,510 ​ $ 245,334 ​ $ 2,755,715 ​ Special Review ​ ​ 643 ​ ​ 67,567 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 68,210 ​ Watch List - Pass ​ ​ 16,490 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 16,490 ​ Watch List - Substandard ​ ​ 18,934 ​ ​ 242 ​ ​ 2,122 ​ ​ — ​ ​ 357 ​ ​ — ​ ​ 21,655 ​ Watch List - Doubtful ​ ​ 52,973 ​ ​ 115 ​ ​ 12,645 ​ ​ — ​ ​ — ​ ​ — ​ ​ 65,733 ​ Total Commercial real estate: farmland & commercial ​ $ 903,313 ​ $ 699,730 ​ $ 545,802 ​ $ 312,757 ​ $ 220,867 ​ $ 245,334 ​ $ 2,927,803 ​ Commercial real estate: multifamily ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 90,092 ​ $ 11,538 ​ $ 108,830 ​ $ 18,621 ​ $ 8,198 ​ $ 29,871 ​ $ 267,150 ​ Watch List - Doubtful ​ ​ 17,901 ​ ​ 25,064 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 42,965 ​ Total Commercial real estate: multifamily ​ $ 107,993 ​ $ 36,602 ​ $ 108,830 ​ $ 18,621 ​ $ 8,198 ​ $ 29,871 ​ $ 310,115 ​ Residential: first lien ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 180,743 ​ $ 107,100 ​ $ 81,618 ​ $ 57,503 ​ $ 29,316 ​ $ 73,390 ​ $ 529,670 ​ Watch List - Substandard ​ ​ 95 ​ ​ — ​ ​ — ​ ​ 274 ​ ​ — ​ ​ — ​ ​ 369 ​ Watch List - Doubtful ​ ​ 23 ​ ​ — ​ ​ 22 ​ ​ — ​ ​ — ​ ​ — ​ ​ 45 ​ Total Residential: first lien ​ $ 180,861 ​ $ 107,100 ​ $ 81,640 ​ $ 57,777 ​ $ 29,316 ​ $ 73,390 ​ $ 530,084 ​ Residential: first lien ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross writeoffs ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 46 ​ $ 46 ​ Residential: junior lien ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 91,202 ​ $ 73,740 ​ $ 65,144 ​ $ 70,969 ​ $ 65,799 ​ $ 102,234 ​ $ 469,088 ​ Watch List- Doubtful ​ ​ 141 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 141 ​ Total Residential: junior lien ​ $ 91,343 ​ $ 73,740 ​ $ 65,144 ​ $ 70,969 ​ $ 65,799 ​ $ 102,234 ​ $ 469,229 ​ Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 38,778 ​ $ 8,137 ​ $ 904 ​ $ 422 ​ $ 22 ​ $ 1,514 ​ $ 49,777 ​ Total Consumer ​ $ 38,778 ​ $ 8,137 ​ $ 904 ​ $ 422 ​ $ 22 ​ $ 1,514 ​ $ 49,777 ​ Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross writeoffs ​ $ 43 ​ $ 120 ​ $ 22 ​ $ — ​ $ — ​ $ — ​ $ 185 ​ Foreign ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 124,716 ​ $ 30,648 ​ $ 16,877 ​ $ 6,962 ​ $ 2,879 ​ $ 4,479 ​ $ 186,561 ​ Total Foreign ​ $ 124,716 ​ $ 30,648 ​ $ 16,877 ​ $ 6,962 ​ $ 2,879 ​ $ 4,479 ​ $ 186,561 ​ Total Loans ​ $ 3,472,021 ​ $ 2,298,973 ​ $ 1,284,843 ​ $ 826,553 ​ $ 404,659 ​ $ 522,777 ​ $ 8,809,826 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2023 2022 2021 2020 2019 Prior Total ​ ​ (Dollars in Thousands) Balance at December 31, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Domestic ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 791,233 ​ $ 272,919 ​ $ 364,271 ​ $ 50,602 ​ $ 21,468 ​ $ 74,119 ​ $ 1,574,612 Special Review ​ ​ 7,613 ​ ​ 1,800 ​ ​ 164 ​ ​ — ​ ​ — ​ ​ — ​ ​ 9,577 Watch List - Pass ​ ​ 11,865 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 11,865 Watch List - Substandard ​ ​ 1,180 ​ ​ 92 ​ ​ 28 ​ ​ — ​ ​ — ​ ​ 4 ​ ​ 1,304 Watch List - Doubtful ​ ​ 27 ​ ​ 30,810 ​ ​ 35 ​ ​ — ​ ​ — ​ ​ — ​ ​ 30,872 Total Commercial ​ $ 811,918 ​ $ 305,621 ​ $ 364,498 ​ $ 50,602 ​ $ 21,468 ​ $ 74,123 ​ $ 1,628,230 Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross writeoffs ​ $ 7,053 ​ $ 2,187 ​ $ 155 ​ $ 264 ​ $ 2 ​ $ 3 ​ $ 9,664 Commercial real estate: other construction & land development ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 938,739 ​ $ 674,037 ​ $ 324,238 ​ $ 96,400 ​ $ 14,058 ​ $ 3,219 ​ $ 2,050,691 Watch List - Substandard ​ ​ 25,230 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 25,230 Watch List - Doubtful ​ ​ 2,726 ​ ​ 12,975 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 15,701 Total Commercial real estate: other construction & land development ​ $ 966,695 ​ $ 687,012 ​ $ 324,238 ​ $ 96,400 ​ $ 14,058 ​ $ 3,219 ​ $ 2,091,622 Commercial real estate: farmland & commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 888,878 ​ $ 628,653 ​ $ 415,458 ​ $ 267,705 ​ $ 184,164 ​ $ 248,626 ​ $ 2,633,484 Special Review ​ ​ 5,205 ​ ​ — ​ ​ 3,357 ​ ​ — ​ ​ — ​ ​ — ​ ​ 8,562 Watch List - Pass ​ ​ 16,654 ​ ​ 87 ​ ​ 233 ​ ​ — ​ ​ — ​ ​ — ​ ​ 16,974 Watch List - Substandard ​ ​ 129,644 ​ ​ 2,201 ​ ​ — ​ ​ 2,304 ​ ​ 84 ​ ​ 1 ​ ​ 134,234 Watch List - Doubtful ​ ​ 211 ​ ​ 88 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 299 Total Commercial real estate: farmland & commercial ​ $ 1,040,592 ​ $ 631,029 ​ $ 419,048 ​ $ 270,009 ​ $ 184,248 ​ $ 248,627 ​ $ 2,793,553 Commercial real estate: multifamily ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 123,523 ​ $ 94,551 ​ $ 42,081 ​ $ 73,652 ​ $ 10,743 ​ $ 36,193 ​ $ 380,743 Watch List - Doubtful ​ ​ — ​ ​ 96 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 96 Total Commercial real estate: multifamily ​ $ 123,523 ​ $ 94,647 ​ $ 42,081 ​ $ 73,652 ​ $ 10,743 ​ $ 36,193 ​ $ 380,839 Residential: first lien ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 180,127 ​ $ 83,568 ​ $ 68,082 ​ $ 39,935 ​ $ 27,499 ​ $ 78,306 ​ $ 477,517 Watch List - Substandard ​ ​ — ​ ​ — ​ ​ 327 ​ ​ — ​ ​ — ​ ​ 95 ​ ​ 422 Watch List - Doubtful ​ ​ — ​ ​ 93 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 93 Total Residential: first lien ​ $ 180,127 ​ $ 83,661 ​ $ 68,409 ​ $ 39,935 ​ $ 27,499 ​ $ 78,401 ​ $ 478,032 Residential: first lien ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross writeoffs ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 43 ​ $ 43 Residential: junior lien ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 88,628 ​ $ 76,845 ​ $ 96,411 ​ $ 76,490 ​ $ 34,870 ​ $ 87,625 ​ $ 460,869 Total Residential: junior lien ​ $ 88,628 ​ $ 76,845 ​ $ 96,411 ​ $ 76,490 ​ $ 34,870 ​ $ 87,625 ​ $ 460,869 Residential: junior lien ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross writeoffs ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 298 ​ $ 298 Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

Bank Premises and Equipment

Bank Premises and Equipment	12 Months Ended
	Dec. 31, 2024
Bank Premises and Equipment
Bank Premises and Equipment	(5) Bank Premises and Equipment A summary of bank premises and equipment, by asset classification, at December 31, 2024 and 2023 were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Estimated ​ ​ ​ ​ ​ ​ ​ ​ useful lives ​ 2024 ​ 2023 ​ ​ ​ ​ ​ ​ ​ (Dollars in Thousands) Bank buildings and improvements 5 - 39 years $ 588,093 $ 582,075 ​ Furniture, equipment and vehicles 1 - 20 years ​ 331,200 ​ 325,855 ​ Land ​ ​ ​ ​ ​ ​ 110,919 ​ 108,551 ​ Less: accumulated depreciation ​ ​ ​ ​ ​ ​ (601,991) ​ (579,387) ​ Bank premises and equipment, net ​ ​ ​ ​ ​ ​ $ 428,221 ​ $ 437,094 ​ ​

Deposits

Deposits	12 Months Ended
	Dec. 31, 2024
Deposits.
Deposits	(6) Deposits Deposits as of December 31, 2024 and 2023 and related interest expense for the years ended December 31, 2024, 2023, and 2022 were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2024 ​ 2023 ​ ​ (Dollars in Thousands) Deposits: ​ ​ ​ Demand - non-interest bearing ​ ​ ​ ​ ​ ​ ​ Domestic ​ $ 3,790,875 ​ $ 4,126,635 ​ Foreign ​ 821,469 ​ 904,210 ​ Total demand non-interest bearing ​ 4,612,344 ​ 5,030,845 ​ Savings and interest bearing demand ​ ​ ​ ​ ​ ​ ​ Domestic ​ 3,317,461 ​ 3,161,411 ​ Foreign ​ 1,282,496 ​ 1,207,121 ​ Total savings and interest bearing demand ​ 4,599,957 ​ 4,368,532 ​ Time, certificates of deposit $100,000 or more ​ ​ ​ ​ ​ ​ ​ Domestic ​ 876,254 ​ 763,419 ​ Foreign ​ 1,390,566 ​ 1,103,710 ​ Less than $100,000 ​ ​ ​ ​ ​ ​ ​ Domestic ​ 317,220 ​ 289,565 ​ Foreign ​ 315,503 ​ 268,483 ​ Total time, certificates of deposit ​ 2,899,543 ​ 2,425,177 ​ Total deposits ​ $ 12,111,844 ​ $ 11,824,554 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2024 ​ 2023 ​ 2022 ​ ​ (Dollars in Thousands) Interest expense: ​ ​ ​ ​ Savings and interest bearing demand ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Domestic $ 56,759 ​ $ 42,148 ​ $ 9,196 ​ Foreign ​ 25,153 ​ 18,189 ​ 3,490 ​ Total savings and interest bearing demand ​ 81,912 ​ 60,337 ​ 12,686 ​ Time, certificates of deposit $100,000 or more ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Domestic ​ 32,283 ​ 18,597 ​ 5,528 ​ Foreign ​ 47,420 ​ 25,471 ​ 3,867 ​ Less than $100,000 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Domestic ​ 8,748 ​ 4,592 ​ 1,027 ​ Foreign ​ 8,517 ​ 4,498 ​ 735 ​ Total time, certificates of deposit ​ 96,968 ​ 53,158 ​ 11,157 ​ Total interest expense on deposits ​ $ 178,880 ​ $ 113,495 ​ $ 23,843 ​ ​ Scheduled maturities of time deposits as of December 31, 2024 were as follows: ​ ​ ​ ​ ​ ​ ​ Total ​ ​ (in thousands) 2025 ​ $ 2,730,997 ​ 2026 ​ 119,228 ​ 2027 ​ 32,607 ​ 2028 ​ 16,285 ​ 2029 ​ 424 ​ Thereafter ​ 2 ​ Total ​ $ 2,899,543 ​ ​ Scheduled maturities of time deposits in amounts of $100,000 or more at December 31, 2024, were as follows: ​ ​ ​ ​ ​ ​ ​ Total ​ ​ (in thousands) Due within 3 months or less $ 982,133 Due after 3 months and within 6 months ​ 698,349 Due after 6 months and within 12 months ​ 465,005 Due after 12 months ​ 121,333 ​ ​ $ 2,266,820 ​ Time deposits that meet or exceed the FDIC insurance limit of $250,000 at December 31, 2024 and December 31, 2023 were $1,494,267,000 and $1,202,170,000, respectively.

Securities Sold Under Repurchas

Securities Sold Under Repurchase Agreements	12 Months Ended
	Dec. 31, 2024
Securities Sold Under Repurchase Agreements
Securities Sold Under Repurchase Agreements	(7) Securities Sold Under Repurchase Agreements Our Subsidiary Banks have entered into repurchase agreements with individual customers of the Subsidiary Banks. The purchasers have agreed to resell to the Subsidiary Banks identical securities upon the maturities of the agreements. Securities sold under repurchase agreements were mortgage-backed securities and averaged $616,208,000 and $469,152,000 during 2024 and 2023, respectively, and the maximum amount outstanding at any month end during 2024 and 2023 was $713,772,000 and $544,418,000, respectively. Further information related to repurchase agreements at December 31, 2024 and 2023 is set forth in the following table: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Collateral Securities ​ Repurchase Borrowing ​ ​ Book Value of ​ Fair Value of ​ Balance of ​ Weighted Average ​ ​ Securities Sold ​ Securities Sold ​ Liability ​ Interest Rate ​ ​ (Dollars in Thousands) December 31, 2024 term: ​ ​ ​ ​ Overnight agreements ​ $ 775,760 ​ $ 687,091 ​ $ 523,152 3.09 % 1 to 29 days ​ 15,872 ​ 13,604 ​ 11,100 4.75 ​ 30 to 90 days ​ — ​ — ​ — — ​ Over 90 days ​ 1,914 ​ 1,871 ​ 1,070 4.00 ​ Total ​ $ 793,546 ​ $ 702,566 ​ $ 535,322 3.12 % December 31, 2023 term: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Overnight agreements ​ $ 667,647 ​ $ 587,673 ​ $ 518,650 3.76 % 1 to 29 days ​ 24,842 ​ 20,454 ​ 10,696 4.50 ​ 30 to 90 days ​ — ​ — ​ — — ​ Over 90 days ​ 1,623 ​ 1,574 ​ 1,070 4.00 ​ Total ​ $ 694,112 ​ $ 609,701 ​ $ 530,416 3.78 % ​ The book value and fair value of securities sold includes the entire book value and fair value of securities partially or fully pledged under repurchase agreements.

Other Borrowed Funds

Other Borrowed Funds	12 Months Ended
	Dec. 31, 2024
Other Borrowed Funds
Other Borrowed Funds	(8) Other Borrowed Funds Other borrowed funds include Federal Home Loan Bank borrowings, which may be short, and long-term fixed borrowings issued by the Federal Home Loan Bank of Dallas and the Federal Home Loan Bank of Topeka at the market price offered at the time of funding. These borrowings are secured by mortgage-backed investment securities and a portion of our loan portfolio. Further information regarding our other borrowed funds at December 31, 2024 and 2023 is set forth in the following table: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ ​ 2024 ​ 2023 ​ ​ (Dollars in Thousands) Federal Home Loan Bank advances—long-term(1) ​ ​ ​ ​ ​ ​ ​ Balance at year end ​ $ 10,541 ​ $ 10,745 ​ Rate on balance outstanding at year end ​ 2.61 % 2.61 % Average daily balance ​ $ 10,635 ​ $ 10,837 ​ Average rate ​ 2.61 % 2.61 % Maximum amount outstanding at any month end ​ $ 10,729 ​ $ 10,928 ​ (1) Long-term advances at December 31, 2024 and December 31, 2023 consisted of amortizing advances. Two amortizing advances are outstanding at December 31, 2024 in the amounts of $2,852,000 and $7,689,000 and mature in December 2033 and November 2033, respectively. The amortization on the amortizing long-term advances totals approximately $210,000 , $215,000 , $221,000 , $227,000 and $233,000 for the years ending December 31, 2025, 2026, 2027, 2028 and December 31, 2029, respectively .

Junior Subordinated Interest De

Junior Subordinated Interest Deferrable Debentures	12 Months Ended
	Dec. 31, 2024
Junior Subordinated Interest Deferrable Debentures
Junior Subordinated Interest Deferrable Debentures	(9) Junior Subordinated Deferrable Interest Debentures We currently have four statutory business trusts under the laws of the State of Delaware for the purpose of issuing trust preferred securities. These statutory business trusts (the “Trusts”) each issued capital and common securities (“Capital and Common Securities”) and invested the proceeds thereof in an equivalent amount of junior subordinated debentures (the “Debentures”) we issued. As of December 31, 2024 and December 31, 2023, the principal amount of debentures outstanding totaled $108,868,000, respectively. The Debentures are subordinated and junior in right of payment to all our present and future senior indebtedness (as defined in the respective indentures) and are pari passu For financial reporting purposes, the Trusts are treated as investments and not consolidated in the consolidated financial statements. Although the Capital Securities issued by each of the Trusts are not included as a component of shareholders’ equity on the consolidated statement of condition, the Capital Securities are treated as capital for regulatory purposes. Specifically, under applicable regulatory guidelines, the Capital Securities issued by the Trusts qualify as Tier 1 capital up to a maximum of 25% of Tier 1 capital on an aggregate basis. Any amount that exceeds the 25% threshold would qualify as Tier 2 capital. At December 31, 2024 and December 31, 2023, the total $108,868,000, respectively, of the Capital Securities outstanding qualified as Tier 1 capital. The following table illustrates key information about each of the Debentures and their interest rates at December 31, 2024: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Junior ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Subordinated ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Deferrable ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest ​ Repricing ​ Interest ​ Interest ​ ​ ​ Optional ​ ​ ​ Debentures ​ Frequency ​ Rate ​ Rate Index (1) ​ Maturity Date ​ Redemption Date (2) ​ ​ ​ (Dollars in Thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Trust IX ​ $ 41,238 Quarterly 6.47 % SOFR + 1.62 October 2036 October 2011 ​ Trust X ​ 21,021 Quarterly 6.48 % SOFR + 1.65 February 2037 February 2012 ​ Trust XI ​ 25,990 Quarterly 6.47 % SOFR + 1.62 July 2037 July 2012 ​ Trust XII ​ 20,619 Quarterly 6.21 % SOFR + 1.45 September 2037 September 2012 ​ ​ ​ $ 108,868 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (1) On July 1, 2023, the interest rate index on the Capital and Common Securities transitioned from U.S.-dollar London Interbank Offered Rate (“LIBOR”) to the Three-Month CME Term Secured Overnight Financing rate (“SOFR”) with a 26 -basis point spread adjustment. (2) The Capital Securities may be redeemed in whole or in part on any interest payment date after the Optional Redemption Date.

Earnings per Share ("EPS")

Earnings per Share ("EPS")	12 Months Ended
	Dec. 31, 2024
Earnings Per Share [Abstract]
Earnings per Share ("EPS")	(10) Earnings per Share (“EPS”) Basic EPS is calculated by dividing net income by the weighted average number of common shares outstanding. The computation of diluted EPS assumes the issuance of common shares for all dilutive potential common shares outstanding during the reporting period. The calculation of the basic EPS and the diluted EPS for the years ended December 31, 2024, 2023, and 2022 is set forth in the following table: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net Income ​ Shares ​ Per Share ​ ​ (Numerator) ​ (Denominator) ​ Amount ​ ​ (Dollars in Thousands, ​ ​ Except Per Share Amounts) December 31, 2024: ​ ​ ​ Basic EPS ​ ​ ​ ​ ​ ​ ​ ​ ​ Net income available to common shareholders ​ $ 409,167 62,180,448 ​ $ 6.58 ​ Potential dilutive common shares ​ — 117,830 ​ ​ ​ ​ Diluted EPS ​ $ 409,167 62,298,278 ​ $ 6.57 ​ December 31, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ Basic EPS ​ ​ ​ ​ ​ ​ ​ ​ ​ Net income available to common shareholders ​ $ 411,768 62,082,827 ​ $ 6.63 ​ Potential dilutive common shares ​ — 138,774 ​ ​ ​ ​ Diluted EPS ​ $ 411,768 62,221,601 ​ $ 6.62 ​ December 31, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ Basic EPS ​ ​ ​ ​ ​ ​ ​ ​ ​ Net income available to common shareholders ​ $ 300,232 62,658,414 ​ $ 4.79 ​ Potential dilutive common shares ​ — 151,820 ​ ​ ​ ​ Diluted EPS ​ $ 300,232 62,810,234 ​ $ 4.78 ​ ​

Employees' Profit Sharing Plan

Employees' Profit Sharing Plan	12 Months Ended
	Dec. 31, 2024
Employees' Profit Sharing Plan
Employees' Profit Sharing Plan	(11) Employees’ Profit-Sharing Plan We have a deferred profit-sharing plan for full-time employees with a minimum of one year of continuous employment. Our annual contribution to the plan is based on a percentage, as determined by our Board of Directors, of income before income taxes, as defined, for the year. Allocation of the contribution among officers and employees’ accounts is based on length of service and amount of salary earned. Profit sharing costs of $4,460,000, $4,011,000, and $4,300,000 were charged to income for the years ended December 31, 2024, 2023, and 2022, respectively.

International Operations

International Operations	12 Months Ended
	Dec. 31, 2024
International Operations
International Operations	(12) International Operations We provide international banking services for our customers through our Subsidiary Banks. Neither we nor our Subsidiary Banks have facilities located outside the United States. International operations are distinguished from domestic operations based upon the domicile of the customer. Because the resources we employ are common to both international and domestic operations, it is not practical to determine net income generated exclusively from international activities. A summary of assets attributable to international operations at December 31, 2024 and 2023 are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2024 ​ 2023 ​ ​ (Dollars in Thousands) Loans: ​ ​ ​ Commercial ​ $ 99,836 ​ $ 106,241 ​ Others ​ 86,725 ​ 74,454 ​ ​ ​ 186,561 ​ 180,695 ​ Less allowance for probable credit losses ​ (1,346) ​ (1,283) ​ Net loans ​ $ 185,215 ​ $ 179,412 ​ Accrued interest receivable ​ $ 991 ​ $ 515 ​ ​ At December 31, 2024 and December 31, 2023, we had $149,543,000 and $147,551,000, respectively, in outstanding standby and commercial letters of credit to facilitate trade activities. Revenues directly attributable to international operations were approximately $8,669,000, $8,212,000, and $4,821,000 for the years ended December 31, 2024, 2023 and 2022, respectively.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2024
Income Taxes
Income Taxes	(13) Income Taxes We file a consolidated U.S. Federal and State income tax return. The current and deferred portions of net income tax expense included in the consolidated statements of income are presented below for the years ended December 31: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2024 ​ 2023 ​ 2022 ​ ​ (Dollars in Thousands) Current ​ ​ ​ ​ U.S. ​ $ 105,114 ​ $ 82,657 ​ $ 66,670 ​ State ​ 5,905 ​ 6,137 ​ 5,118 ​ Total current taxes ​ 111,019 ​ 88,794 ​ 71,788 ​ Deferred ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. ​ (11,430) ​ 23,001 ​ 10,555 ​ State ​ (36) ​ (51) ​ 64 ​ Total deferred taxes ​ (11,466) ​ 22,950 ​ 10,619 ​ Total income taxes ​ $ 99,553 ​ $ 111,744 ​ $ 82,407 ​ ​ The income tax expense differs from the amount computed by applying the U.S. Federal income tax rate of 21% for 2024, 2023, and 2022 to income before income taxes. Included in the table below is the net tax benefit related to investments in LIHTC projects. Additional information on LIHTC investments can be found in Note 2 – Investment Securities, Equity Securities with Readily Determinable Fair Values and Other Investments. The reasons for the differences for the years ended December 31 are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2024 ​ 2023 ​ 2022 ​ ​ (Dollars in Thousands) Computed expected tax expense $ 107,134 $ 110,065 $ 80,893 ​ Change in taxes resulting from: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Tax-exempt interest income ​ (3,233) ​ (3,663) ​ (2,433) ​ State tax, net of federal income taxes, tax credit and refunds ​ 4,636 ​ 4,808 ​ 4,094 ​ Other investment income ​ (2,626) ​ (2,761) ​ (1,391) ​ Net investment in low income housing investments ​ ​ (2,531) ​ ​ 1,974 ​ ​ 1,906 ​ Other ​ (3,827) ​ 1,321 ​ (662) ​ Actual tax expense ​ $ 99,553 ​ $ 111,744 ​ $ 82,407 ​ ​ The tax effects of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities at December 31, 2024 and 2023 are reflected below: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2024 ​ 2023 ​ ​ (Dollars in Thousands) Deferred tax assets: ​ ​ ​ Loans receivable, principally due to the allowance for probable loan losses ​ $ 40,883 ​ $ 32,136 ​ Other real estate owned ​ 1,443 ​ 1,649 ​ Accrued expenses ​ 539 ​ 581 ​ Net unrealized losses on available for sale investment securities ​ ​ 105,339 ​ ​ 110,584 ​ Other ​ 1,480 ​ 1,352 ​ Total deferred tax assets ​ 149,684 ​ 146,302 ​ Deferred tax liabilities: ​ ​ ​ ​ ​ ​ ​ Bank premises and equipment, principally due to differences on depreciation ​ (14,648) ​ (14,879) ​ Impairment charges on available-for-sale securities ​ ​ (19) ​ ​ (19) ​ Identified intangible assets and goodwill ​ (14,151) ​ (14,151) ​ Partnership investment pass through ​ ​ (55,117) ​ ​ (58,376) ​ Other ​ (4,189) ​ (3,321) ​ Total deferred tax liabilities ​ (88,124) ​ (90,746) ​ Net deferred tax asset ​ $ 61,560 ​ $ 55,556 ​ ​ The net deferred tax asset of $61,560,000 and $55,556,000 at December 31, 2024 and December 31, 2023, respectively, is included in other assets in the consolidated statements of condition.

Stock Options and Stock Appreci

Stock Options and Stock Appreciation Rights	12 Months Ended
	Dec. 31, 2024
Stock Options and Stock Appreciation Rights
Stock Options and Stock Appreciation Rights	(14) Stock Options and Stock Appreciation Rights On April 5, 2012, the Board of Directors adopted the 2012 International Bancshares Corporation Stock Option Plan (the “2012 Plan”). There were 800,000 shares of common stock available for stock option grants under the 2012 Plan, which were qualified incentive stock options (“ISOs”) or non-qualified stock options. Options granted may be exercisable for a period of up to 10 years from the date of grant, excluding ISOs granted to 10% shareholders, which may be exercisable for a period of up to only five years. On April 4, 2022, the 2012 Plan expired and was not renewed. The fair value of each option award granted under the plan was estimated on the date of grant using a Black-Scholes-Merton option valuation model that uses the assumptions noted in the following table. Expected volatility was based on the historical volatility of the price of our stock. We used historical data to estimate the expected dividend yield and employee termination rates within the valuation model. The expected term of options was derived from historical exercise behavior. The risk-free rate for periods within the contractual life of the option was based on the U.S. Treasury yield curve in effect at the time of grant. ​ A summary of option activity under the stock option plans for the twelve months ended December 31, 2024 is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ ​ ​ ​ ​ ​ Weighted ​ average ​ ​ ​ ​ ​ ​ ​ ​ average ​ remaining ​ Aggregate ​ ​ ​ Number of ​ exercise ​ contractual ​ intrinsic ​ ​ ​ options ​ price ​ term (years) ​ value ($) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (in Thousands) ​ Options outstanding at December 31, 2023 383,865 ​ $ 30.65 ​ ​ ​ ​ ​ ​ Plus: Options granted — ​ ​ — ​ ​ ​ ​ ​ ​ Less: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Options exercised (149,773) ​ ​ 25.08 ​ ​ ​ ​ ​ ​ Options expired — ​ ​ — ​ ​ ​ ​ ​ ​ Options forfeited (21,937) ​ ​ 23.93 ​ ​ ​ ​ ​ ​ Options outstanding at December 31, 2024 212,155 ​ 35.27 4.13 ​ $ 5,918 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Options fully vested and exercisable at December 31, 2024 121,714 ​ $ 35.92 3.31 ​ $ 3,316 ​ ​ Stock-based compensation expense included in the consolidated statements of income for the years ended December 31, 2024, 2023, and 2022 was approximately $214,000, $330,000, and $449,000, respectively. As of December 31, 2024, there was approximately $218,000 of total unrecognized stock-based compensation cost related to non-vested options granted under our plans that will be recognized over a weighted average period of 1.4 years. Other information pertaining to option activity during the twelve months ended December 31, 2024, 2023, and 2022 is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Twelve Months Ended December 31, ​ ​ 2024 ​ 2023 ​ 2022 Weighted average grant date fair value of stock options granted $ — $ — $ 11.24 ​ Total fair value of stock options vested ​ $ 616,286 ​ $ 514,000 ​ $ 514,000 ​ Total intrinsic value of stock options exercised ​ $ 4,640,000 ​ $ 1,060,000 ​ $ 1,670,000 ​ ​ ​ ​ ​ ​ ​ On April 18, 2022, the Board of Directors adopted the 2022 International Bancshares Stock Appreciation Rights Plan (the “SAR Plan”). There are 750,000 shares of underlying common stock that may be used for stock appreciation right (“SAR”) grants under the plan, however, no actual shares will be granted. Upon exercise, the SAR will be settled in cash. SARs granted may be exercisable for a period of up to 10 years from the date of grant and may vest over an eight-year period. As of December 31, 2024, a total of 456,702 SARS had been issued under the SAR Plan. ​ A summary of activity under the SAR Plan for the twelve months ended December 31, 2024 is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ ​ ​ ​ ​ Weighted ​ average ​ ​ ​ ​ ​ Number of ​ average ​ remaining ​ Aggregate ​ ​ stock appreciation ​ exercise ​ contractual ​ intrinsic ​ ​ rights ​ price ​ term (years) ​ value ($) ​ ​ ​ ​ ​ ​ ​ ​ ​ (in Thousands) SARs outstanding at December 31, 2023 465,250 ​ $ 39.35 ​ ​ ​ ​ ​ Plus: SARs granted 8,000 ​ ​ 53.91 ​ ​ ​ ​ ​ Less: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ SARs exercised (2,548) ​ ​ 39.33 ​ ​ ​ ​ ​ SARs expired — ​ ​ — ​ ​ ​ ​ ​ SARs forfeited (14,000) ​ ​ 39.33 ​ ​ ​ ​ ​ SARs outstanding at December 31, 2024 456,702 ​ 39.61 7.54 ​ $ 10,757 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ SARs fully vested and exercisable at December 31, 2024 22,435 ​ $ 39.35 7.50 ​ $ 534 ​ The fair value of the liability for payments due to stock appreciation rights holders at December 31, 2024 and December 31, 2023 is approximately $4,540,000 and $1,464,000, respectively, as calculated using a Black-Scholes-Merton model, and is included in other liabilities on the consolidated statements of condition. The expense recorded in connection with all grants under the SAR Plan totaled $3,144,000, $918,000 and $546,000, respectively, for the twelve months ended December 31, 2024, 2023, and 2022. As of December 31, 2024, there was approximately $8,309,000 in unrecognized liability related to non-vested SARs granted under the plan that will be recognized over a weighted average period of 7.5 ​ ​

Commitments, Contingent Liabili

Commitments, Contingent Liabilities and Other Matters	12 Months Ended
	Dec. 31, 2024
Commitments, Contingent Liabilities and Other Matters
Commitments and Contingent Liabilities and Other Matters	(15) Commitments, Contingent Liabilities and Other Matters On March 15, 2020, the FRB announced that it had reduced regulatory reserve requirements to zero percent effective on March 26, 2020; therefore, no cash is required to be maintained to satisfy regulatory reserve requirements. We are involved in various legal proceedings that are in various stages of litigation. We have determined, based on discussions with our counsel that any material loss in such actions, individually or in the aggregate, is remote or the damages sought, even if fully recovered, would not be considered material to our consolidated statements of condition and related statements of income, comprehensive income, shareholders’ equity, and cash flows. However, many of these matters are in various stages of proceedings and further developments could cause management to revise its assessment of these matters.

Transactions with Related Parti

Transactions with Related Parties	12 Months Ended
	Dec. 31, 2024
Transactions with Related Parties
Transactions with Related Parties	(16) Transactions with Related Parties In the ordinary course of business, the Subsidiary Banks make loans to our directors and executive officers, including their affiliates, families, and companies in which they are principal owners. In the opinion of management, these loans are made on substantially the same terms, including interest rates and collateral, as those prevailing at the time for comparable transactions with other persons and do not involve more than normal risk of collectability or present other unfavorable features. The aggregate amounts receivable from such related parties amounted to approximately $6,669,000 and $13,335,000 at December 31, 2024 and 2023, respectively. ​

Financial Instruments with Off-

Financial Instruments with Off-Statement of Condition Risk and Concentrations of Credit Risk	12 Months Ended
	Dec. 31, 2024
Financial Instruments with Off-Statement of Condition Risk and Concentrations of Credit Risk
Financial Instruments with Off-Statement of Condition Risk and Concentrations of Credit Risk	(17) Financial Instruments with Off-Statement of Condition Risk and Concentrations of Credit Risk In the normal course of business, the Subsidiary Banks are party to financial instruments with off-statement of condition risk to meet the financing needs of their customers. These financial instruments include commitments to their customers. These financial instruments involve, to varying degrees, elements of credit risk in excess of the amounts recognized in the consolidated statement of condition. The contract amounts of these instruments reflect the extent of involvement the Subsidiary Banks have in particular classes of financial instruments. At December 31, 2024, the following financial amounts of instruments, whose contract amounts represent credit risks, were outstanding (in thousands): ​ ​ ​ ​ ​ Commitments to extend credit $ 3,440,252 Credit card lines ​ $ 12,985 Standby letters of credit ​ $ 147,435 Commercial letters of credit ​ $ 2,108 ​ We enter into a standby letter of credit to guarantee performance of a customer to a third party. These guarantees are primarily issued to support public and private borrowing arrangements. The credit risk involved is represented by the contractual amounts of those instruments. Under the standby letters of credit, we are required to make payments to the beneficiary of the letters of credit upon request by the beneficiary so long as all performance criteria have been met. At December 31, 2024, the maximum potential amount of future payments is approximately $147,435,000. At December 31, 2024, the fair value of these guarantees is not significant. Unsecured letters of credit totaled approximately $23,334,000 and $23,677,000 at December 31, 2024 and 2023, respectively. We enter into commercial letters of credit on behalf of our customers which authorize a third party to draw drafts upon us up to a stipulated amount and with specific terms and conditions. A commercial letter of credit is a conditional commitment on our part to provide payment on drafts drawn in accordance with the terms of the commercial letter of credit. The Subsidiary Banks’ exposure to credit loss in the event of nonperformance by the other party to the above financial instruments is represented by the contractual amounts of the instruments. The Subsidiary Banks use the same credit policies in making commitments and conditional obligations as they do for on-statement of condition instruments. The Subsidiary Banks control the credit risk of these transactions through credit approvals, limits, and monitoring procedures. Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates normally less than one year or other termination clauses and may require the payment of a fee. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The Subsidiary Banks evaluate each customer’s credit-worthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary by the Subsidiary Banks upon extension of credit, is based on management’s credit evaluation of the customer. Collateral held varies, but may include residential and commercial real estate, bank certificates of deposit, accounts receivable, and inventory. The Subsidiary Banks make commercial, real estate and consumer loans to customers principally located in south, central and southeast Texas and the State of Oklahoma. Although the loan portfolio is diversified, a substantial portion of its debtors’ ability to honor their contracts is dependent upon the economic conditions in these areas, especially in the real estate and commercial business sectors.

Capital Requirements

Capital Requirements	12 Months Ended
	Dec. 31, 2024
Capital Requirements
Capital Requirements	(18) Capital Requirements Bank regulatory agencies limit the amount of dividends, which the Subsidiary Banks can pay, without obtaining prior approval from such agencies. At December 31, 2024, the Subsidiary Banks could pay dividends of up to $1,440,000,000 without prior regulatory approval and without adversely affecting their “well-capitalized” status under regulatory capital rules in effect at December 31, 2024. In addition to legal requirements, regulatory authorities also consider the adequacy of the Subsidiary Banks’ total capital in relation to their deposits and other factors. These capital adequacy considerations also limit amounts available for payment of dividends. We historically have not allowed any Subsidiary Bank to pay dividends in such a manner as to impair its capital adequacy. We and the Subsidiary Banks are subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on our consolidated financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, we must meet specific capital guidelines that involve quantitative measures of our assets, liabilities, and certain off-statement of condition items as calculated under regulatory accounting practices. Our capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings, and other factors. Current quantitative measures established by regulation to ensure capital adequacy require us to maintain minimum amounts and ratios (set forth in the table on the following page) of Total and Tier 1 capital to risk-weighted assets and of Tier 1 capital to average assets. Management believes, as of December 31, 2024, that we met all capital adequacy requirements to which we are subject. In November 2017, the OCC, the FRB and the FDIC finalized a proposed rule that extends the current treatment under the regulatory capital rules for certain regulatory capital deductions and risk weights and certain minority interest requirements, as they apply to banking organizations that are not subject to the advanced approaches capital rules. Effective January 1, 2018, the rule also paused the full transition to the Basel III treatment of mortgage servicing assets, certain deferred tax assets, investments in the capital of unconsolidated financial institutions and minority interests. The agencies are also considering whether to make adjustments to the capital rules in response to CECL (the FASB Standard relating to current expected credit loss) and its potential impact on regulatory capital. Pursuant to rules issued by the federal bank regulatory agencies in February 2019 and March 2020, banking organizations were given options to phase in the adoption of CECL over a three-year transition period through December 31, 2022 or over a five-year transition period through December 31, 2024. Rather than electing to make one of the phase-in options, we immediately recognized the capital impact upon adopting CECL accounting standards on January 1, 2020, which resulted in an increase in our allowance for probable loan losses and a one-time cumulative-effect adjustment to retained earnings upon adoption. In December 2017, the Basel Committee on Banking Supervision unveiled its final set of standards and reforms to its Basel III regulatory capital framework, commonly called “Basel III Endgame” or “Basel IV.” The Basel IV framework makes changes to the capital framework first introduced as “Basel III” in 2010 and aim to reduce excessive variability in banks’ calculations of risk-weighted capital ratios. Implementation of Basel IV began on January 1, 2023 and will continue over a five-year transition period by regulators in individual countries, including the U.S. federal bank regulatory agencies. The U.S. has targeted implementation of Basel IV to begin on July 1, 2025, subject to a three-year transition period with full compliance expected by July 1, 2028. On May 24, 2018, the Economic Growth, Regulatory Relief and Consumer Protection Act of 2018 (“EGRRCPA”) was enacted, and, among other things, it includes a simplified capital rule change which effectively exempts banks with assets of less than $10 billion that exceed the “community bank leverage ratio,” from all risk-based capital requirements, including Basel III and its predecessors. The federal banking agencies must establish the “community bank leverage ratio” (a ratio of tangible equity to average consolidated assets) between 8% and 10% before community banks can begin to take advantage of this regulatory relief provision. Some of the Subsidiary Banks, with assets of less than $10 billion, may qualify for this exemption. Additionally, under the EGRRCPA, qualified bank holding companies with assets of up to $3 billion (currently $1 billion) will be eligible for the Federal Reserve’s Small Bank Holding Company Policy Statement, which eases limitations on the issuance of debt by holding companies. On August 28, 2018, the Federal Reserve issued an interim final rule expanding the applicability of its Small Bank Holding Company Policy Statement. While holding companies that meet the conditions of the policy statement are excluded from consolidated capital requirements, their depository institutions continue to be subject to minimum capital requirements. Finally, for banks that continue to be subject to the risk-based capital rules of Basel III (e.g., 150%), certain commercial real estate loans that were formally classified as high volatility commercial real estate 31 (“HVCRE”) will not be subject to heightened risk weights if they meet certain criteria. Also, while acquisition, development, and construction loans will generally be subject to heightened risk weights, certain exceptions will apply. On September 18, 2018, the federal banking agencies issued a proposed rule modifying the agencies’ capital rules for HVCRE. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For Capital Adequacy ​ To Be Well-Capitalized ​ ​ ​ ​ ​ ​ ​ Purposes ​ Under Prompt Corrective ​ ​ Actual ​ Phase In Schedule ​ Action Provisions ​ ​ Amount ​ Ratio ​ Amount ​ Ratio ​ Amount ​ Ratio ​ ​ ​ ​ ​ ​ ​ (greater than ​ (greater than ​ (greater than ​ (greater than ​ ​ ​ ​ ​ ​ ​ or equal to) ​ or equal to) ​ or equal to) ​ or equal to) ​ ​ (Dollars in Thousands) As of December 31, 2024: ​ ​ ​ ​ Common Equity Tier 1 (to Risk Weighted Assets): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ $ 2,893,228 ​ 22.42 % $ 903,203 7.000 % ​ N/A N/A ​ International Bank of Commerce, Laredo ​ 1,638,720 ​ 19.46 ​ 589,359 7.000 ​ $ 547,262 6.50 % International Bank of Commerce, Brownsville ​ ​ 554,879 ​ 26.11 ​ ​ 148,761 ​ 7.000 ​ ​ 138,136 ​ 6.50 ​ International Bank of Commerce, Oklahoma ​ 240,023 ​ 20.57 ​ 81,679 7.000 ​ 75,845 6.50 ​ Commerce Bank ​ 102,200 ​ 37.50 ​ 19,077 7.000 ​ 17,714 6.50 ​ International Bank of Commerce, Zapata ​ 66,932 ​ 32.74 ​ 14,310 7.000 ​ ​ 13,287 6.50 ​ Total Capital (to Risk Weighted Assets): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ $ 3,136,215 ​ 24.31 % $ 1,354,805 10.500 % ​ N/A N/A ​ International Bank of Commerce, Laredo ​ 1,744,057 ​ 20.71 ​ 884,039 10.500 ​ $ 841,942 10.00 % International Bank of Commerce, Brownsville ​ ​ 578,515 ​ 27.22 ​ ​ 223,142 ​ 10.500 ​ ​ 212,516 ​ 10.00 ​ International Bank of Commerce, Oklahoma ​ 254,659 ​ 21.82 ​ 122,519 10.500 ​ 116,685 10.00 ​ Commerce Bank ​ 105,090 ​ 38.56 ​ 28,616 10.500 ​ 27,253 10.00 ​ International Bank of Commerce, Zapata ​ 69,278 ​ 33.89 ​ 21,464 10.500 ​ 20,442 10.00 ​ Tier 1 Capital (to Risk Weighted Assets): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ $ 2,974,881 ​ 23.06 % $ 1,096,747 8.500 % N/A N/A ​ International Bank of Commerce, Laredo ​ 1,638,720 ​ 19.46 ​ 715,651 8.500 ​ $ 673,554 8.00 % International Bank of Commerce, Brownsville ​ ​ 554,879 ​ 26.11 ​ ​ 180,639 ​ 8.500 ​ ​ 170,013 ​ 8.00 ​ International Bank of Commerce, Oklahoma ​ 240,023 ​ 20.57 ​ 99,182 8.500 ​ 93,348 8.00 ​ Commerce Bank ​ 102,200 ​ 37.50 ​ 23,165 8.500 ​ 21,802 8.00 ​ International Bank of Commerce, Zapata ​ 66,932 ​ 32.74 ​ 17,376 8.500 ​ 16,354 8.00 ​ Tier 1 Capital (to Average Assets): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ $ 2,974,881 ​ 18.84 % $ 631,755 4.00 % $ N/A N/A ​ International Bank of Commerce, Laredo ​ 1,638,720 ​ 17.67 ​ 370,911 4.00 ​ 463,639 5.00 % International Bank of Commerce, Brownsville ​ ​ 554,879 ​ 13.08 ​ ​ 169,680 ​ 4.00 ​ ​ 212,100 ​ 5.00 ​ International Bank of Commerce, Oklahoma ​ 240,023 ​ 14.47 ​ 66,341 4.00 ​ 82,926 5.00 ​ Commerce Bank ​ 102,200 ​ 13.53 ​ 30,219 4.00 ​ 37,774 5.00 ​ International Bank of Commerce, Zapata ​ 66,932 ​ 13.44 ​ 19,917 4.00 ​ 24,896 5.00 ​ ​ ​ Our actual capital amounts and ratios for 2023 are also presented in the following table: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ To Be Well-Capitalized ​ ​ ​ ​ ​ ​ ​ For Capital Adequacy ​ ​ Under Prompt Corrective ​ ​ Actual ​ Purposes ​ ​ Action Provisions ​ ​ Amount ​ Ratio ​ Amount ​ Ratio ​ ​ Amount Ratio ​ ​ ​ ​ ​ ​ ​ (greater than ​ (greater than ​ (greater than ​ (greater than ​ ​ ​ ​ ​ ​ ​ or equal to) ​ or equal to) ​ or equal to) ​ or equal to) ​ ​ (Dollars in Thousands) As of December 31, 2023: ​ ​ ​ ​ Common Equity Tier 1 (to Risk Weighted Assets): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ $ 2,563,130 ​ 21.72 % $ 825,968 7.000 % ​ N/A N/A ​ International Bank of Commerce, Laredo ​ 1,444,775 ​ 18.54 ​ 545,611 7.000 ​ $ 506,639 6.50 % International Bank of Commerce, Oklahoma ​ ​ 477,390 ​ 24.41 ​ ​ 136,883 ​ 7.000 ​ ​ 127,106 ​ 6.50 ​ International Bank of Commerce, Brownsville ​ 232,965 ​ 20.72 ​ 78,718 7.000 ​ 73,095 6.50 ​ International Bank of Commerce, Zapata ​ 97,334 ​ 36.57 ​ 18,628 7.000 ​ 17,298 6.50 ​ Commerce Bank ​ 64,110 ​ 31.18 ​ 14,394 7.000 ​ 13,366 6.50 ​ Total Capital (to Risk Weighted Assets): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ $ 2,790,171 ​ 23.65 % $ 1,238,952 10.500 % ​ N/A N/A % International Bank of Commerce, Laredo ​ 1,542,462 ​ 19.79 ​ 818,416 10.500 ​ $ 779,444 10.00 ​ International Bank of Commerce, Oklahoma ​ ​ 500,268 ​ 25.58 ​ ​ 205,325 ​ 10.500 ​ ​ 195,547 ​ 10.00 ​ International Bank of Commerce, Brownsville ​ 247,031 ​ 21.97 ​ 118,076 10.500 ​ 112,454 10.00 ​ International Bank of Commerce, Zapata ​ 100,660 ​ 37.82 ​ 27,943 10.500 ​ 26,612 10.00 ​ Commerce Bank ​ 66,680 ​ 32.43 ​ 21,591 10.500 ​ 20,563 10.00 ​ Tier 1 Capital (to Risk Weighted Assets): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ % Consolidated ​ $ 2,642,492 ​ 22.39 % $ 1,002,961 8.500 % N/A N/A ​ International Bank of Commerce, Laredo ​ 1,444,775 ​ 18.54 ​ 662,527 8.500 ​ $ 623,555 8.00 ​ International Bank of Commerce, Oklahoma ​ ​ 477,390 ​ 24.41 ​ ​ 166,215 ​ 8.500 ​ ​ 156,438 ​ 8.00 ​ International Bank of Commerce, Brownsville ​ 232,965 ​ 20.72 ​ 95,586 8.500 ​ 89,963 8.00 ​ International Bank of Commerce, Zapata ​ 97,334 ​ 36.57 ​ 22,620 8.500 ​ 21,290 8.00 ​ Commerce Bank ​ 64,110 ​ 31.18 ​ 17,478 8.500 ​ 16,450 8.00 % Tier 1 Capital (to Average Assets): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ $ 2,642,492 ​ 17.46 % $ 605,262 4.00 % $ N/A N/A ​ International Bank of Commerce, Laredo ​ 1,444,775 ​ 16.40 ​ 352,412 4.00 ​ 440,515 5.00 ​ International Bank of Commerce, Oklahoma ​ ​ 477,390 ​ 11.79 ​ ​ 161,919 ​ 4.00 ​ ​ 202,398 ​ 5.00 ​ International Bank of Commerce, Brownsville ​ 232,965 ​ 14.72 ​ 63,294 4.00 ​ 79,117 5.00 ​ International Bank of Commerce, Zapata ​ 97,334 ​ 14.50 ​ 26,858 4.00 ​ 33,572 5.00 ​ Commerce Bank ​ 64,110 ​ 13.26 ​ 19,338 4.00 ​ 24,172 5.00 ​ ​

Fair Value

Fair Value	12 Months Ended
	Dec. 31, 2024
Fair Value
Fair Value	(19) Fair Value ASC Topic 820, “Fair Value Measurements and Disclosures” (“ASC 820”) defines fair value, establishes a framework for measuring fair value in generally accepted accounting principles, and expands disclosures about fair value measurements. ASC 820 applies to all financial instruments that are being measured and reported on a fair value basis. ASC 820 defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date; it also establishes a fair value hierarchy that prioritizes the inputs used in valuation methodologies into the following three levels: ● Level 1 Inputs—Unadjusted quoted prices in active markets for identical assets or liabilities. ● Level 2 Inputs—Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. ● Level 3 Inputs—Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Level 3 assets and liabilities include financial instruments whose value is determined using pricing models, discounted cash flow methodologies, or other valuation techniques, as well as instruments for which the determination of fair value requires significant management judgment or estimation. ​ A description of the valuation methodologies used for instruments measured at fair value, as well as the general classification of such instruments pursuant to the valuation hierarchy is set forth below. The following table represents financial instruments reported on the consolidated statements of condition at their fair value as of December 31, 2024 by level within the fair value measurement hierarchy. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurements at ​ ​ ​ ​ ​ ​ Reporting Date Using ​ ​ ​ ​ ​ ​ (in Thousands) ​ ​ ​ ​ ​ ​ Quoted ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Prices in ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Active ​ Significant ​ ​ ​ ​ ​ ​ Assets/Liabilities ​ Markets for ​ Other ​ Significant ​ ​ ​ Measured at ​ Identical ​ Observable ​ Unobservable ​ ​ ​ Fair Value ​ Assets ​ Inputs ​ Inputs ​ ​ ​ December 31, 2024 ​ (Level 1) ​ (Level 2) ​ (Level 3) ​ Measured on a recurring basis: ​ ​ ​ ​ ​ Assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Available for sale debt securities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential mortgage-backed securities ​ $ 4,835,176 ​ $ — ​ $ 4,835,176 ​ $ — ​ States and political subdivisions ​ 152,741 ​ — ​ 152,741 ​ — ​ Equity Securities ​ 5,394 ​ 5,394 ​ ​ — ​ — ​ ​ ​ $ 4,993,311 ​ $ 5,394 ​ $ 4,987,917 ​ $ — ​ ​ The following table represents financial instruments reported on the consolidated balance sheets at their fair value as of December 31, 2023 by level within the fair value measurement hierarchy. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurements at ​ ​ ​ ​ ​ ​ Reporting Date Using ​ ​ ​ ​ ​ ​ (in Thousands) ​ ​ ​ ​ ​ ​ Quoted ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Prices in ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Active ​ Significant ​ ​ ​ ​ ​ ​ Assets/Liabilities ​ Markets for ​ Other ​ Significant ​ ​ ​ Measured at ​ Identical ​ Observable ​ Unobservable ​ ​ ​ Fair Value ​ Assets ​ Inputs ​ Inputs ​ ​ ​ December 31, 2023 ​ (Level 1) ​ (Level 2) ​ (Level 3) ​ Measured on a recurring basis: ​ ​ ​ ​ ​ Assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Available for sale securities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential mortgage-backed securities ​ $ 4,660,099 ​ $ — ​ $ 4,660,099 ​ $ — ​ States and political subdivisions ​ 162,242 ​ — ​ 162,242 ​ — ​ Equity Securities ​ 5,417 ​ 5,417 ​ — ​ — ​ ​ ​ $ 4,827,758 ​ $ 5,417 ​ $ 4,822,341 ​ $ — ​ ​ For the years ended December 31, 2024 and December 31, 2023, debt investment securities available-for-sale are classified within Level 2 of the valuation hierarchy. Equity securities with readily determinable fair values are classified within Level 1. For debt securities classified as Level 2 in the fair value hierarchy, we obtain fair value measurements from an independent pricing service. The fair value measurements consider observable data that may include dealer quotes, market spreads, cash flows, the U.S. Treasury yield curve, live trading levels, trade execution data, market consensus prepayment speeds, credit information, and the bond’s terms and conditions, among other things. Certain financial instruments are measured at fair value on a nonrecurring basis. They are not measured at fair value on an ongoing basis but are subject to fair value adjustments in certain circumstances (for example, when there is evidence of impairment). The following table represents financial instruments measured at fair value on a non-recurring basis as of and for the period ended December 31, 2024 by level within the fair value measurement hierarchy: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurements at Reporting ​ ​ ​ ​ ​ ​ ​ ​ Date Using ​ ​ ​ ​ ​ ​ ​ ​ (in thousands) ​ ​ ​ ​ ​ ​ ​ ​ Quoted ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Assets/Liabilities ​ Prices in ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Measured at ​ Active ​ Significant ​ ​ ​ ​ ​ ​ ​ ​ Fair Value ​ Markets for ​ Other ​ Significant ​ Net ​ ​ Period ended ​ Identical ​ Observable ​ Unobservable ​ Provision ​ ​ December 31, ​ Assets ​ Inputs ​ Inputs ​ During ​ ​ 2024 ​ (Level 1) ​ (Level 2) ​ (Level 3) ​ Period Measured on a non-recurring basis: ​ ​ ​ ​ ​ Assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Watch List—Doubtful loans ​ $ 169,246 ​ $ — ​ $ — ​ $ 169,246 ​ $ 14,662 Other real estate owned ​ ​ 11,537 ​ ​ — ​ ​ — ​ ​ 11,537 ​ ​ 632 ​ The following table represents financial instruments measured at fair value on a non-recurring basis as of and for the year ended December 31, 2023 by level within the fair value measurement hierarchy: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurements at Reporting ​ ​ ​ ​ ​ ​ ​ ​ Date Using ​ ​ ​ ​ ​ ​ ​ ​ (in thousands) ​ ​ ​ ​ ​ ​ ​ ​ Quoted ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Assets/Liabilities ​ Prices in ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Measured at ​ Active ​ Significant ​ ​ ​ ​ ​ ​ ​ ​ Fair Value ​ Markets ​ Other ​ Significant ​ Net ​ ​ Year ended ​ for Identical ​ Observable ​ Unobservable ​ Provision ​ ​ December 31, ​ Assets ​ Inputs ​ Inputs ​ During ​ ​ 2023 ​ (Level 1) ​ (Level 2) ​ (Level 3) ​ Period Measured on a non-recurring basis: ​ ​ ​ ​ ​ Assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Watch List—Doubtful loans ​ $ 46,124 ​ $ — ​ $ — ​ $ 46,124 ​ $ 10,221 Other real estate owned ​ 307 ​ — ​ — ​ 307 ​ 2,538 ​ Our assets measured at fair value on a non-recurring basis are limited to loans classified as Watch List—Doubtful and other real estate owned. The tabular disclosures above include only those loans or other real estate owned that had a change in the provision for credit loss during the reporting period or for which a new specific provision for credit loss was established during the reporting period. The fair value of Watch List—Doubtful loans is derived in accordance with FASB ASC Subtopic 326-10, “Financial Instruments – Credit Losses - Overall”. They are primarily comprised of collateral-dependent commercial loans. As the primary sources of loan repayments decline, the secondary repayment source, the collateral, takes on greater significance. Correctly evaluating the fair value becomes even more important. Re-measurement of the loan to fair value is done through a specific valuation allowance included in the allowance for credit losses (“ACL”). The fair value of the loan is based on the fair value of the collateral, as determined through either an appraisal or internal evaluation process. The basis for our appraisal and appraisal review process are applicable regulatory guidelines, including regulatory appraisal laws and the Uniform Standards of Professional Appraisal Practice, which are incorporated into our lending policy. All collateral dependent loans are evaluated in accordance with our lending policy to assess if a third-party appraisal is required to be obtained as part of our credit underwriting and monitoring process. Collateral dependent loans that do not meet the requirements for a third-party appraisal are required to undergo an internal evaluation by our in-house independent appraisal staff. ​ Our determination to either seek an appraisal or to perform an internal evaluation is performed by our credit quality committee, which analyzes the existing collateral values of the doubtful loans and identifies obsolete appraisals or internal evaluations. The credit quality committee reviews the existing appraisal to determine if the collateral value is reasonable in view of the current use of the collateral and the economic environment related to the collateral. The ultimate decision on the appropriate action is made by our independent credit administration team. A new appraisal is not required if an internal evaluation, as performed by our in-house independent appraisal staff, is able to appropriately update the original appraisal assumptions to reflect current market conditions and provide an estimate of the collateral’s market value for analysis of the doubtful loan. The internal evaluations must be in writing and contain sufficient information detailing the analysis, assumptions and conclusions, and they must support performing an evaluation in lieu of ordering a new appraisal. ​ As of December 31, 2024, we had $168,621,000 of doubtful commercial collateral-dependent loans, of which $110,583,000 had an appraisal performed within the immediately preceding rolling twelve-month period, and of which $0 had an internal evaluation performed within the immediately preceding rolling twelve-month period. As of December 31, 2023, we had approximately $46,491,000 of doubtful commercial collateral-dependent loans, of which $1,272,000 had an appraisal performed within the immediately preceding rolling twelve-month period and of which $35,061,000 had an internal evaluation performed within the immediately preceding rolling twelve-month period. ​ Other real estate owned is comprised of real estate acquired by foreclosure and deeds in lieu of foreclosure. Other real estate owned is carried at the lower of the recorded investment in the property or its fair value less estimated costs to sell such property (as determined by independent appraisal) within Level 3 of the fair value hierarchy. Prior to foreclosure, the value of the underlying loan is written down to the fair value of the real estate to be acquired by a charge to the ACL (formerly allowance for probable loan losses), if necessary. The fair value is reviewed periodically, and subsequent write downs are made accordingly through a charge to operations. Other real estate owned is included in other assets on the consolidated financial statements. For the twelve months ended December 31, 2024, 2023, and 2022, we recorded approximately $2,228,000, $0, and $2,000, respectively, in charges to the ACL in connection with loans transferred to other real estate owned. For the twelve months ended December 31, 2024, 2023, and 2022, we recorded approximately $632,000, $2,538,000, and $1,627,000, respectively, in adjustments to fair value in connection with other real estate owned. The fair value estimates, methods, and assumptions for our financial instruments at December 31, 2024 and December 31, 2023 are outlined below. Cash and Cash Equivalents For these short-term instruments, the carrying amount is a reasonable estimate of fair value. Investment securities held-to-maturity The carrying amounts of investments held-to-maturity approximate fair value. Investment Securities For debt investment securities, which may include U.S. Treasury securities, obligations of other U.S. government agencies, obligations of states and political subdivisions and mortgage pass through and related securities, fair values are from an independent pricing service. The fair value measurements consider observable data that may include dealer quotes, market spreads, cash flows, the U.S. Treasury yield curve, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the bond’s terms and conditions, among other things. See disclosures of fair value of investment securities in Note 2 – Investment Securities, Equity Securities with Readily Determinable Fair Values and Other Investments. Loans Fair values are estimated for portfolios of loans with similar financial characteristics. For variable rate performing loans, the carrying amount approximates the fair value. For fixed rate performing loans, the fair value is calculated by discounting scheduled cash flows using current interest rates at which similar loans with similar terms would be made to borrowers of similar credit quality. Fixed rate performing loans are within Level 3 of the fair value hierarchy. At December 31, 2024 and December 31, 2023, the carrying amount of fixed rate performing loans was $1,216,156,000 and $1,199,347,000, respectively, and the estimated fair value was $1,154,862,000 and $1,073,892,000, respectively. Accrued Interest The carrying amounts of accrued interest approximate fair value. Deposits The fair value of deposits with no stated maturity, such as non-interest bearing demand deposit accounts, savings accounts and interest-bearing demand deposit accounts, was equal to the amount payable on demand as of December 31, 2024 and December 31, 2023. The fair value of time deposits is based on the discounted value of contractual cash flows. The discount rate is based on currently offered rates. Time deposits are within Level 3 of the fair value hierarchy. At December 31, 2024 and December 31, 2023, the carrying amount of time deposits was $2,899,543,000 and $2,425,177,000, respectively, and the estimated fair value was $2,895,245,000 and $2,428,681,000, respectively. Securities Sold Under Repurchase Agreements Securities sold under repurchase agreements are short-term maturities. Due to the contractual terms of the instruments, the carrying amounts approximated fair value at December 31, 2024 and December 31, 2023. Junior Subordinated Deferrable Interest Debentures We currently have floating rate junior subordinated deferrable interest debentures outstanding. Due to the contractual terms of the floating rate junior subordinated deferrable interest debentures, the carrying amounts approximated fair value at December 31, 2024 and December 31, 2023. Other Borrowed Funds We currently have long-term borrowings issued from the Federal Home Loan Bank (“FHLB”). The long-term borrowings outstanding at December 31, 2024 and December 31, 2023 are fixed-rate borrowings and the fair value is based on established market spreads for similar types of borrowings. The fixed-rate long-term borrowings are included in Level 2 of the fair value hierarchy. At December 31, 2024 and December 31, 2023, the carrying amount of the fixed-rate long-term FHLB borrowings was $10,541,000 and $10,745,000, respectively, and the estimated fair value was $10,541,000 and $10,745,000, respectively. Commitments to Extend Credit and Letters of Credit Commitments to extend credit and fund letters of credit are principally at current interest rates and therefore the carrying amount approximates fair value. Limitations Fair value estimates are made at a point in time, based on relevant market information and information about the financial instrument. These estimates do not reflect any premium or discount that could result from offering for sale at one time of our entire holdings of a particular financial instrument. Because no market exists for a significant portion of our financial instruments, fair value estimates are based on judgments regarding future expected loss experience, current economic conditions, risk characteristics of various financial instruments, and other factors. These estimates are subjective in nature and involve uncertainties and matters of significant judgment and therefore cannot be determined with precision. Changes in assumptions could significantly affect the estimates. Fair value estimates are based on existing on-and off-statement of condition financial instruments without attempting to estimate the value of anticipated future business and the value of assets and liabilities that are not considered financial instruments. Other significant assets and liabilities that are not considered financial assets or liabilities include the bank premises and equipment and core deposit value. In addition, the tax ramifications related to the effect of fair value estimates have not been considered in the above estimates.

International Bancshares Corpor

International Bancshares Corporation (Parent Company Only) Financial Information Statements of Condition	12 Months Ended
	Dec. 31, 2024
International Bancshares Corporation (Parent Company Only) Financial Information Statements of Condition
International Bancshares Corporation (Parent Company Only) Financial Information Statements of Condition	(20) International Bancshares Corporation (Parent Company Only) Financial Information Statements of Condition (Parent Company Only) December 31, 2024 and 2023 (Dollars in Thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2024 2023 ASSETS ​ ​ ​ ​ ​ ​ ​ Cash ​ $ 65,858 ​ $ 105,184 ​ Other investments ​ 155,416 ​ 111,382 ​ Net loans ​ 60,502 ​ 62,150 ​ Investment in subsidiaries ​ 2,622,447 ​ 2,281,952 ​ Goodwill ​ ​ 3,365 ​ ​ 3,365 ​ Other assets ​ 12,744 ​ 8,617 ​ Total assets ​ $ 2,920,332 ​ $ 2,572,650 ​ LIABILITIES AND SHAREHOLDERS’ EQUITY ​ ​ ​ ​ ​ ​ ​ Liabilities: ​ ​ ​ ​ ​ ​ ​ Junior subordinated deferrable interest debentures ​ $ 108,868 ​ $ 108,868 ​ Due to IBC Trading ​ 21 ​ 21 ​ Other liabilities ​ 14,736 ​ 15,987 ​ Total liabilities ​ 123,625 ​ 124,876 ​ Shareholders’ equity: ​ ​ ​ ​ ​ ​ ​ Common shares ​ 96,617 ​ 96,467 ​ Surplus ​ 159,333 ​ 155,511 ​ Retained earnings ​ 3,356,177 ​ 3,029,088 ​ Accumulated other comprehensive loss ​ (379,054) ​ (397,889) ​ ​ ​ 3,233,073 ​ 2,883,177 ​ Less cost of shares in treasury ​ (436,366) ​ (435,403) ​ Total shareholders’ equity ​ 2,796,707 ​ 2,447,774 ​ Total liabilities and shareholders’ equity ​ $ 2,920,332 ​ $ 2,572,650 ​ ​

International Bancshares Corp_2

International Bancshares Corporation (Parent Company Only) Financial Information Statements of Income	12 Months Ended
	Dec. 31, 2024
International Bancshares Corporation (Parent Company Only) Financial Information Statements of Income
International Bancshares Corporation (Parent Company Only) Financial Information Statements of Income	(21) International Bancshares Corporation (Parent Company Only) Financial Information Statements of Income (Parent Company Only) Years ended December 31, 2024, 2023 and 2022 (Dollars in Thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2024 2023 2022 Income: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Dividends from subsidiaries ​ $ 130,000 ​ $ 179,000 ​ $ 222,175 ​ Interest income on notes receivable ​ 7,602 ​ 5,769 ​ 2,394 ​ (Loss) income on other investments ​ (3,356) ​ (6,150) ​ 8,662 ​ Other ​ 1,059 ​ 4 ​ 857 ​ Total income ​ 135,305 ​ 178,623 ​ 234,088 ​ Expenses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest expense (Debentures) ​ 7,762 ​ 8,122 ​ 5,037 ​ Provision for credit loss ​ ​ 625 ​ ​ 500 ​ ​ 437 ​ Other ​ 6,252 ​ 252 ​ 2,291 ​ Total expenses ​ 14,639 ​ 8,874 ​ 7,765 ​ Income before federal income taxes and equity in undistributed net income of subsidiaries ​ 120,666 ​ 169,749 ​ 226,323 ​ Income tax (benefit) expense ​ (833) ​ (1,365) ​ 504 ​ Income before equity in undistributed net income of subsidiaries ​ 121,499 ​ 171,114 ​ 225,819 ​ Equity in undistributed net income of subsidiaries ​ 287,668 ​ 240,654 ​ 74,413 ​ Net income ​ $ 409,167 ​ $ 411,768 ​ $ 300,232 ​ ​

International Bancshares Corp_3

International Bancshares Corporation (Parent Company Only) Financial Information Statements of Cash Flows	12 Months Ended
	Dec. 31, 2024
International Bancshares Corporation (Parent Company Only) Financial Information Statements of Cash Flows
International Bancshares Corporation (Parent Company Only) Financial Information Statements of Cash Flows	(22) International Bancshares Corporation (Parent Company Only) Financial Information Statements of Cash Flows (Parent Company Only) Years ended December 31, 2024, 2023 and 2022 (Dollars in Thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2024 2023 2022 Operating activities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net income ​ $ 409,167 ​ $ 411,768 ​ $ 300,232 ​ Adjustments to reconcile net income to net cash provided by operating activities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Provision for credit loss ​ ​ 625 ​ ​ 500 ​ ​ 437 ​ Unrealized (gain) loss on equity securities with readily determinable fair values ​ ​ (27) ​ ​ (14) ​ ​ 36 ​ Stock compensation expense ​ 214 ​ 330 ​ 449 ​ (Decrease) increase in other liabilities ​ (1,251) ​ 4,911 ​ 1,743 ​ Equity in undistributed net income of subsidiaries ​ (287,668) ​ (240,654) ​ (74,413) ​ Net cash provided by operating activities ​ 121,060 ​ 176,841 ​ 228,484 ​ Investing activities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net increase in loans ​ (24,528) ​ (20,170) ​ (32,556) ​ Increase in other assets and other investments ​ (56,575) ​ (33,285) ​ (43,343) ​ Net cash used in investing activities ​ (81,103) ​ (53,455) ​ (75,899) ​ Financing activities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Redemption of long-term debt ​ — ​ (25,774) ​ — ​ Proceeds from stock transactions ​ 3,758 ​ 1,167 ​ 1,537 ​ Payments of cash dividends - common ​ (82,078) ​ (78,247) ​ (75,375) ​ Purchase of treasury stock ​ (963) ​ (4,611) ​ (52,048) ​ Net cash used in financing activities ​ (79,283) ​ (107,465) ​ (125,886) ​ (Decrease) increase in cash ​ (39,326) ​ 15,921 ​ 26,699 ​ Cash at beginning of year ​ 105,184 ​ 89,263 ​ 62,564 ​ Cash at end of year ​ $ 65,858 ​ $ 105,184 ​ $ 89,263 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Non-cash investing activities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net transfers from loans to other investments ​ $ 25,551 ​ $ — ​ $ — ​ ​

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Pay vs Performance Disclosure
Net Income (Loss)	$ 409,167	$ 411,768	$ 300,232

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Dec. 31, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Insider Trading Policies and Pr

Insider Trading Policies and Procedures	12 Months Ended
	Dec. 31, 2024
Insider Trading Policies and Procedures [Line Items]
Insider Trading Policies and Procedures Adopted	true

Cybersecurity Risk Management a

Cybersecurity Risk Management and Strategy Disclosure	12 Months Ended
	Dec. 31, 2024
Cybersecurity Risk Management, Strategy, and Governance [Line Items]
Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block]	Risk Management and Strategy As part of our ISSP and strategy for managing cybersecurity risks, we have adopted the following cybersecurity policies: · Enterprise Information Systems Security Policy, which, among other objectives, prescribes a comprehensive framework for creating a practice-based Information Security Management System; protecting the confidentiality, integrity, and availability of our data and systems; providing for the development, review, maintenance, and ability to ensure the effectiveness of minimum security controls required to protect our data and systems; and recognizing the highly-networked nature of the current computing environment to provide effective company-wide management and oversight of related cybersecurity risks; · Corporate Account Takeover Policy, which serves to mitigate the risks of corporate account takeover crimes and to document our compliance with the Texas Department of Banking’s Supervisory Memorandum 1029 on “Risk Management of Account Takeovers,” dated September 30, 2019, and the FFIEC’s guidance on “Authentication and Access to Financial Institution Services and Systems,” dated August 11, 2021; · Vendor Management Policy, which provides a risk-based process for identifying, measuring, monitoring, and managing third-party relationships with new and existing vendors by requiring an assessment, categorization, and ranking of the risks associated with each third-party vendor and implements a third-party risk-management process that focuses on risk assessment, due diligence in selecting third-party vendors, contract structuring and review, and ongoing oversight of the operational and financial performance of the third-party vendor’s products and services; · Service Center Physical Security for Data and Computing Equipment Policy, which provides directives for implementing appropriate physical security controls to protect the hardware, infrastructure, and systems that store and transmit our sensitive information and data from damage, unauthorized access, and loss of availability; to monitor, analyze, and properly disclose security alerts and information; and to administer other administrative and technical operational security procedures; and · Security Incident Response Policy, which establishes the steps necessary to ensure a timely and adequate response to security incidents impacting our security systems or infrastructure. · Forming a Security Council Committee (SCC), which consists primarily of members of our management team and IT department, to develop and oversee our cybersecurity policies and infrastructure and establishing a multi-tiered reporting and governance system pursuant to which our SCC reports to our Service Center Board, which reports to our Risk Committee, which reports to our Board; · Implementing heightened safety measures, physical-security controls, and controlled-access requirements to protect the Service Center that houses the hardware and infrastructure used to store and transmit sensitive and confidential bank, customer, and employee information in accordance with the FFIEC IT Examination Handbook on Information Security and designating a specialized Service Center Board within the Service Center Department to oversee the protection of the Service Center’s physical integrity; · Maintaining a clearly defined ISSP, which prescribes measures to establish and enforce our security program, addresses each component of our information security (IS) position, and advances our objectives of protecting and managing risks to our data and security systems by establishing policies, standards, controls, procedures, and guidelines that address topics such as security and privacy governance, statutory, regulatory, and contractual compliance, business and disaster recovery, change management, identification and authentication processes, expectations for continuous monitoring, asset management, third-party provider management, endpoint security, and incident responses, among others; ● Conducting an annual self-assessment using the Cyber Risk Institute (based on the NIST Cybersecurity Framework) to review our cyber risk-management strategy and framework, assess the effectiveness and legal and regulatory compliance of our organizational cybersecurity policy, and evaluate our policies and procedures for identifying risks, protecting information, detecting security threats, responding to cyber incidents, executing recovery plans, and managing levels of external dependence and resiliency; · Conducting regular cybersecurity training for our employees regarding security awareness, the proper use and handling of sensitive information, and the protocols in place to identify, assess, and manage any cybersecurity threats and periodically testing employees’ cybersecurity knowledge, policy compliance, and response rates by engaging with third-party providers to conduct internal social engineering campaigns; · Engaging in security-incident preparedness simulations and completing disaster recovery and resilience tests designed to test and strengthen any vulnerabilities in our cybersecurity infrastructure; · Employing robust encryption and anonymization technologies and other cybersecurity monitoring and auditing systems to fortify our cybersecurity framework, including through our Online Banking Enhanced Security Program, which requires the authorized users on a customer’s account to be validated and employs multi-factor authentication (MFA), which requires each of our retail and commercial customers to authenticate their identities by entering a secure access code that our MFA system automatically generates and sends to the customer each time there is an attempted login to the customer’s online banking account; · Implementing MFA protections for our treasury customers by prohibiting their initiation of ACH transactions or wire transfers until they authenticate their identities using a security token that is generated and sent by our online-banking MFA system; ● Communicating awareness and education of security risks, social engineering and scams affecting our customers through targeted marketing and social media messaging strategies and campaigns; ● Monitoring electronic mail and other network intrusion attempts with various tools to identify and stop intrusion and malware threats; ● Scanning and assessing vulnerabilities arising from software and hardware on our network infrastructure, ATMs, software applications, computers, copiers and other electronic assets to ensure that vulnerabilities are identified and resolved timely; · Establishing a risk-appetite profile, which we review at least annually to regularly assess our cybersecurity infrastructure and software systems in a manner that ensures we capture their current state and identify emerging risks that would require changes in our cyber environment; · Leveraging internal and external auditors as well as security consultants to review the procedures, systems, and controls that comprise our ISSP to evaluate their design and operational effectiveness and to address any operational deficiencies or security weaknesses; and · Maintaining an Incident Response Plan that establishes our procedures and standards for responding to actual or potential cybersecurity threats or incidents, which we review at least annually.
Cybersecurity Risk Management Processes Integrated [Flag]	true
Cybersecurity Risk Management Processes Integrated [Text Block]	· Forming a Security Council Committee (SCC), which consists primarily of members of our management team and IT department, to develop and oversee our cybersecurity policies and infrastructure and establishing a multi-tiered reporting and governance system pursuant to which our SCC reports to our Service Center Board, which reports to our Risk Committee, which reports to our Board; · Implementing heightened safety measures, physical-security controls, and controlled-access requirements to protect the Service Center that houses the hardware and infrastructure used to store and transmit sensitive and confidential bank, customer, and employee information in accordance with the FFIEC IT Examination Handbook on Information Security and designating a specialized Service Center Board within the Service Center Department to oversee the protection of the Service Center’s physical integrity; · Maintaining a clearly defined ISSP, which prescribes measures to establish and enforce our security program, addresses each component of our information security (IS) position, and advances our objectives of protecting and managing risks to our data and security systems by establishing policies, standards, controls, procedures, and guidelines that address topics such as security and privacy governance, statutory, regulatory, and contractual compliance, business and disaster recovery, change management, identification and authentication processes, expectations for continuous monitoring, asset management, third-party provider management, endpoint security, and incident responses, among others; ● Conducting an annual self-assessment using the Cyber Risk Institute (based on the NIST Cybersecurity Framework) to review our cyber risk-management strategy and framework, assess the effectiveness and legal and regulatory compliance of our organizational cybersecurity policy, and evaluate our policies and procedures for identifying risks, protecting information, detecting security threats, responding to cyber incidents, executing recovery plans, and managing levels of external dependence and resiliency; · Conducting regular cybersecurity training for our employees regarding security awareness, the proper use and handling of sensitive information, and the protocols in place to identify, assess, and manage any cybersecurity threats and periodically testing employees’ cybersecurity knowledge, policy compliance, and response rates by engaging with third-party providers to conduct internal social engineering campaigns; · Engaging in security-incident preparedness simulations and completing disaster recovery and resilience tests designed to test and strengthen any vulnerabilities in our cybersecurity infrastructure; · Employing robust encryption and anonymization technologies and other cybersecurity monitoring and auditing systems to fortify our cybersecurity framework, including through our Online Banking Enhanced Security Program, which requires the authorized users on a customer’s account to be validated and employs multi-factor authentication (MFA), which requires each of our retail and commercial customers to authenticate their identities by entering a secure access code that our MFA system automatically generates and sends to the customer each time there is an attempted login to the customer’s online banking account; · Implementing MFA protections for our treasury customers by prohibiting their initiation of ACH transactions or wire transfers until they authenticate their identities using a security token that is generated and sent by our online-banking MFA system; ● Communicating awareness and education of security risks, social engineering and scams affecting our customers through targeted marketing and social media messaging strategies and campaigns; ● Monitoring electronic mail and other network intrusion attempts with various tools to identify and stop intrusion and malware threats; ● Scanning and assessing vulnerabilities arising from software and hardware on our network infrastructure, ATMs, software applications, computers, copiers and other electronic assets to ensure that vulnerabilities are identified and resolved timely; · Establishing a risk-appetite profile, which we review at least annually to regularly assess our cybersecurity infrastructure and software systems in a manner that ensures we capture their current state and identify emerging risks that would require changes in our cyber environment; · Leveraging internal and external auditors as well as security consultants to review the procedures, systems, and controls that comprise our ISSP to evaluate their design and operational effectiveness and to address any operational deficiencies or security weaknesses; and · Maintaining an Incident Response Plan that establishes our procedures and standards for responding to actual or potential cybersecurity threats or incidents, which we review at least annually.
Cybersecurity Risk Management Third Party Engaged [Flag]	true
Cybersecurity Risk Third Party Oversight and Identification Processes [Flag]	true
Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Flag]	false
Cybersecurity Risk Board of Directors Oversight [Text Block]	Governance Security Council Committee . Other Committees. Chief Information Security Officer . Procedures Governing our Cybersecurity Incident Responses. · After becoming aware of a potential cybersecurity incident, our IT Service Desk reports the incident and any pertinent information to our CISO. Our IT Service Desk is the central point of contact for reporting computer incidents or intrusions. · The CISO then conducts a preliminary analysis of the incident and determines whether activating the full IRT is warranted. Types of incidents that would generally require the activation of our IRT include but are not limited to a breach of personal information, a denial-of-service (DoS) or distributed DoS attack, excessive port scans, a firewall breach, or a virus or malware outbreak. · If the type of incident or the threat created by the incident necessitates a full-scale response by the IRT, the CISO notifies a team of network and security engineers, security analysts, and Windows / Unix / Linux systems administrators (collectively, the IT Security and Engineering Teams). · At the CISO’s direction, the IT Security and Engineering Teams gather intel regarding the incident and take pre-planned steps to mitigate harm, address system weaknesses, and block ongoing threats. For example, our network engineers analyze network traffic for external attacks, search for signs of a firewall breach, and take action to block a suspected intruder’s network traffic; our security analysts and engineers look for indications of an attack or suspicious activity by monitoring and reviewing the network activity of our business applications and the audit logs of our mission-critical servers; and our systems administrators examine system logs of our critical systems for any abnormal activity, confirm our mission-critical computers are up to date on all service packs and patches, and ensure backups have been created for our critical systems. · The CISO reports the incident to our executive management team, Service Center Board, and SCC. · Our CISO, executive management team, Service Center Board, and SCC evaluate the type and severity of the incident, review applicable legal and regulatory requirements for disclosing cybersecurity incidents, and determine whether, when, and to whom the incident must be reported. Procedures Governing our Third-Party Vendor Relationships. Procedures Governing our Corporate Account Takeover Responses. Our information systems may experience an interruption or breach in security
Cybersecurity Risk Board Committee or Subcommittee Responsible for Oversight [Text Block]	Security Council Committee
Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block]	The SCC meets at least quarterly to discuss its oversight of our cybersecurity policies and procedures, risk-management practices and controls, and efforts to mitigate and prevent cybersecurity risks. The SCC may meet more frequently if required by our Incident Response Plan to facilitate timely response, monitoring, risk-management, and recovery efforts. The SCC is also charged with periodically reporting to management, the Board, and the Risk Committee, the status, and results of our compliance with our security program, results of security assessments, and effectiveness of remediation activities.
Cybersecurity Risk Role of Management [Text Block]	Other Committees. Chief Information Security Officer . Procedures Governing our Cybersecurity Incident Responses. · After becoming aware of a potential cybersecurity incident, our IT Service Desk reports the incident and any pertinent information to our CISO. Our IT Service Desk is the central point of contact for reporting computer incidents or intrusions. · The CISO then conducts a preliminary analysis of the incident and determines whether activating the full IRT is warranted. Types of incidents that would generally require the activation of our IRT include but are not limited to a breach of personal information, a denial-of-service (DoS) or distributed DoS attack, excessive port scans, a firewall breach, or a virus or malware outbreak. · If the type of incident or the threat created by the incident necessitates a full-scale response by the IRT, the CISO notifies a team of network and security engineers, security analysts, and Windows / Unix / Linux systems administrators (collectively, the IT Security and Engineering Teams). · At the CISO’s direction, the IT Security and Engineering Teams gather intel regarding the incident and take pre-planned steps to mitigate harm, address system weaknesses, and block ongoing threats. For example, our network engineers analyze network traffic for external attacks, search for signs of a firewall breach, and take action to block a suspected intruder’s network traffic; our security analysts and engineers look for indications of an attack or suspicious activity by monitoring and reviewing the network activity of our business applications and the audit logs of our mission-critical servers; and our systems administrators examine system logs of our critical systems for any abnormal activity, confirm our mission-critical computers are up to date on all service packs and patches, and ensure backups have been created for our critical systems. · The CISO reports the incident to our executive management team, Service Center Board, and SCC. · Our CISO, executive management team, Service Center Board, and SCC evaluate the type and severity of the incident, review applicable legal and regulatory requirements for disclosing cybersecurity incidents, and determine whether, when, and to whom the incident must be reported.
Cybersecurity Risk Management Positions or Committees Responsible [Flag]	true
Cybersecurity Risk Management Positions or Committees Responsible [Text Block]	Chief Information Security Officer (CISO)
Cybersecurity Risk Process for Informing Management or Committees Responsible [Text Block]	. Our CISO reports to our Senior and Executive Management Committee, the SCC, the Risk Committee, and the Chairman of the Board.  At least annually, the CISO presents all of our IS policies to the Board.  The CISO is also tasked with maintaining an effective Security Awareness Program and providing training to our management, Board, and employees on an annual basis.  Additionally, the CISO meets with our Audit Committee on a quarterly basis to inform them of material cybersecurity-related regulatory updates and with our full Board on a monthly basis to discuss and provide pertinent regulatory information.
Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag]	true

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2024
Summary of Significant Accounting Policies
Consolidation and Basis of Presentation	Consolidation and Basis of Presentation Our consolidated financial statements include the accounts of the International Bancshares Corporation, its wholly owned Subsidiary Banks and its wholly owned non-bank subsidiaries, IBC Trading Company, Premier Tierra Holdings, Inc., IBC Charitable and Community Development Corporation, IBC Capital Corporation and Diamond Beach Holdings, LLC. All significant inter-company balances and transactions have been eliminated in consolidation. We, through our Subsidiary Banks, are primarily engaged in the business of banking, including the acceptance of checking and savings deposits and the making of commercial, real estate, personal, home improvement, automobile, and other installment and term loans. Our primary markets are north, south, central, and southeast Texas and the state of Oklahoma. Each of our Subsidiary Banks is highly active in facilitating international trade along the United States border with Mexico and elsewhere. Although our loan portfolio is diversified, the ability of our debtors to honor their contracts is primarily dependent upon the economic conditions in our trade area. In addition, the investment portfolio is directly impacted by fluctuations in market interest rates. We are subject to the regulations of certain federal agencies as well as the Texas Department of Banking and the Oklahoma Department of Banking and undergo periodic examinations by those regulatory authorities. Such agencies may require certain standards or impose certain limitations based on their judgments or changes in law and regulations. We own one insurance-related subsidiary, IBC Insurance Agency, Inc., a wholly owned subsidiary of our Subsidiary Bank, International Bank of Commerce, Laredo. The insurance-related subsidiary does not conduct underwriting activities. The preparation of the consolidated financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the dates of the statement of condition and income and expenses for the periods. Actual results could differ significantly from those estimates. Material estimates that are particularly susceptible to significant changes in the near-term relate to the determination of the allowance for credit losses (“ACL”).
Subsequent Events	Subsequent Events We have evaluated all events or transactions that occurred through the date we issued these financial statements. During this period, we did not have any material recognizable or non-recognizable subsequent events.
Investment Securities	Investment Securities We classify debt securities into one of these categories: held-to-maturity, available-for-sale, or trading. Such classifications are reassessed for appropriate classification at each reporting date. Securities that are intended and expected to be held until maturity are classified as “held-to-maturity” and are carried at amortized cost for financial statement reporting. Securities that are not positively expected to be held until maturity but are intended to be held for an indefinite period of time are classified as “available-for-sale” or “trading” and are carried at their fair value. Unrealized holding gains and losses are included in net income for those securities classified as “trading,” while unrealized holding gains and losses related to those securities classified as “available-for-sale” are excluded from net income and reported net of tax as other comprehensive income (loss) and in shareholders’ equity as accumulated other comprehensive income (loss) until realized. Unrealized gains and losses related to equity securities with readily determinable fair values are included in net income. Available-for-sale and held-to-maturity debt securities in an unrealized loss position are evaluated for the underlying cause of the loss. In the event that the deterioration in value is attributable to credit related reasons, then the amount of credit- related impairment would be recorded as a charge to our ACL with subsequent changes in the amount of impairment, up or down, also recorded through our ACL. The exception to this process will occur if we intend to sell an impaired available- for-sale debt security or if we will more likely than not be required to sell a credit impaired available-for-sale debt security prior to the value recovering to the security’s amortized cost. In those situations, the entire credit-related impairment amount would be required to be recognized in earnings. We have evaluated the debt securities classified as available-for-sale and held-to-maturity at December 31, 2024 and have determined that no debt securities in an unrealized loss position are arising from credit related reasons and have therefore not recorded any allowances for debt securities in our ACL for the periods. We did not maintain any trading securities during the three-year period ended December 31, 2024. Mortgage-backed securities held at December 31, 2024 and 2023 represent participating interests in pools of long-term first mortgage loans originated and serviced by the issuers of the securities. Mortgage-backed securities are either issued or guaranteed by the U.S. government or its agencies including Freddie Mac, Fannie Mae, Ginnie Mae or other non-government entities. Investments in residential mortgage-backed securities issued by Ginnie Mae are fully guaranteed by the U. S. government. Investments in residential mortgage-backed securities issued by Freddie Mac and Fannie Mae are not fully guaranteed by the U.S. government; however, we believe that the quality of the bonds is similar to other AAA rated bonds with limited credit risk, particularly given the placement of Fannie Mae and Freddie Mac into conservatorship by the federal government in 2008 and because securities issued by others that are collateralized by residential mortgage-backed securities issued by Fannie Mae or Freddie Mac are rated consistently as AAA rated securities. Market interest rate fluctuations can affect the prepayment speed of principal and the yield on the security. Premiums and discounts are amortized using the level yield or “interest method” over the terms of the securities. Declines in the fair value of held-to-maturity and available-for sale-securities below their cost that are deemed to be other than temporary are reflected in earnings as realized losses. In determining whether other-than-temporary impairment exists, management considers many factors, including (i) the length of time and the extent to which the fair value has been less than cost, (ii) the financial condition and near-term prospects of the issuer, and (iii) our intent to hold and our determination of whether we will more likely than not be required to sell the security prior to a recovery in fair value. If we determine that (i) we intend to sell the security or (ii) it is more likely than not that we will be required to sell the security before it’s anticipated recovery, the other-than-temporary impairment that is recognized in earnings is equal to the difference between the fair value of the security and our amortized cost of the security. If we determine that we (i) do not intend to sell the security and (ii) we will not be more likely than not required to sell the security before it’s anticipated recovery, the other-than-temporary impairment is segregated into its two components (i) the amount of impairment related to credit loss and (ii) the amount of impairment related to other factors. The difference between the present value of the cash flows expected to be collected and the amortized cost is the credit loss recognized through earnings and an adjustment to the cost basis of the security. The amount of impairment related to other factors is included in other comprehensive income (loss). Gains and losses on the sale of securities are recorded on the trade date and are determined using the specific identification method.
Equity Securities	Equity Securities
Provision and Allowance for Credit Losses, Loans, Doubtful Loans	Provision and Allowance for Credit Losses Our ACL is based on an expected credit loss model that recognizes credit losses over the life of a financial asset. Expected credit losses capture historical information, current conditions, and reasonable and supportable forecasts of future conditions. The ACL is deducted from the amortized cost of an instrument to present the net amount expected to be collected on the financial asset. Our ACL primarily consists of the aggregate ACL estimates of our Subsidiary Banks. The estimates are established through charges to operations in the form of charges to provisions for credit loss expense. Loan losses or recoveries are charged or credited directly to the ACL. The ACL of each Subsidiary Bank is maintained at a level considered appropriate by management, based on estimated current expected credit losses in the current loan portfolio, including information about past events, current conditions, and reasonable and supportable forecasts. Our management continually reviews the ACL of the Subsidiary Banks using the amounts determined from the estimates established on specific doubtful loans, the estimate established on quantitative historical loss percentages, and the estimate based on qualitative current conditions and reasonable and supportable two-year forecasted data. Our methodology reverts to the average lifetime loss-rate beyond the forecast period when we can no longer develop reasonable and supportable forecasts. Should any of the factors considered by management in evaluating the adequacy of the estimate for current expected credit losses change, our estimate of current expected credit losses could also change, which could affect the level of future credit loss expense. While the calculation of our ACL utilizes management’s best judgment and all information reasonably available, the adequacy of the ACL is dependent on a variety of factors beyond our control, including, among other things, the performance of the entire loan portfolio, the economy, government actions, changes in interest rates, and the view of regulatory authorities towards loan classifications. We believe that the allowance for probable loan losses is adequate. The Subsidiary Banks charge-off that portion of any loan which management considers to represent a loss as well as that portion of any other loan which is classified as a “loss” by bank examiners. Commercial, financial, and agricultural or real estate loans are generally considered by management to represent a loss, in whole or part, (i) when an exposure beyond any collateral coverage is apparent, (ii) when no further collection of the portion of the loan so exposed is anticipated based on actual results, (iii) when the credit enhancements, if any, are not adequate, and (iv) when the borrower’s financial condition would indicate so. Generally, unsecured consumer loans are charged-off when 90 days past due. Loans Loans are reported at the principal balance outstanding, net of unearned discounts. Interest income on loans is reported on an accrual basis. Loan fees and costs associated with originating the loans are accreted or amortized over the life of the loan using the interest method. We originate mortgage loans that may subsequently be sold to an unaffiliated third party. The loans are not securitized and if sold, are sold without recourse. Loans held for sale are carried at cost and the principal amount outstanding is not significant to the consolidated financial statements. Doubtful Loans Doubtful loans are those loans where it is probable that all amounts due according to contractual terms of the loan agreement will not be collected. Doubtful loans are measured based on (i) the present value of expected future cash flows discounted at the loan’s effective interest rate; (ii) the loan’s observable market price; or (iii) the fair value of the collateral if the loan is collateral dependent. Substantially all our doubtful loans are measured at the fair value of the collateral. In limited cases, we may use other methods to determine the level of impairment of a loan if such loan is not collateral dependent. Troubled Loan Modifications
Non-Accrual Loans	Non-Accrual Loans The non-accrual loan policy of our Subsidiary Banks is to discontinue the accrual of interest on loans when management determines that it is probable that future interest accruals will be un-collectible. As it relates to consumer loans, management charges-off those loans when the loan is contractually 90 days past due. Under special circumstances, a consumer or non-consumer loan may be more than 90 days delinquent as to interest or principal and not be placed on non-accrual status. This situation generally results when a Subsidiary Bank has a borrower who is experiencing financial difficulties, but not to the extent that requires a restructuring of indebtedness. The majority of this category is composed of loans that are considered to be adequately secured and/or for which there are expected future payments. When a loan is placed on non-accrual status, any interest accrued, not paid is reversed and charged to operations against interest income. As it relates to non-consumer loans that are not 90 days past due, management will evaluate each of these loans to determine if placing the loan on non-accrual status is warranted. Interest income on non-accrual loans is recognized only to the extent payments are received or when, in management’s opinion, the debtor’s financial condition warrants reestablishment of interest accruals.
Other Real Estate Owned and Repossessed Assets	Other Real Estate Owned and Repossessed Assets Other real estate owned is comprised of real estate acquired by foreclosure and deeds in lieu of foreclosure. Other real estate is carried at the lower of the recorded investment in the property or its fair value less estimated costs to sell such property (as determined by independent appraisal). Prior to foreclosure, the value of the underlying loan is written down to the fair value of the real estate to be acquired by a charge to the ACL, if necessary. Any subsequent write-downs are charged against other non-interest expense through a valuation allowance. Other real estate owned totaled approximately $28,193,000 and $26,728,000 at December 31, 2024 and 2023, respectively. Other real estate owned is included in other assets. Repossessed assets consist primarily of non-real estate assets acquired by foreclosure. Prior to foreclosure, the value of the underlying loan is written down to the fair value of the asset to be repossessed by a charge to the ACL, if necessary. Repossessed assets are included in other assets on the consolidated financial statements and totaled approximately $358,000 and $236,000 at December 31, 2024 and 2023, respectively.
Bank Premises and Equipment	Bank Premises and Equipment Bank premises and equipment are stated at cost less accumulated depreciation. Depreciation is computed on straight-line and accelerated methods over the estimated useful lives of the assets. Repairs and maintenance are charged to operations as incurred and expenditures for renewals and betterments are capitalized. We primarily own all the property we occupy, with the exception of certain branches operating in grocery store or retail shopping centers and certain ATM locations, which are all under operating leases as classified under guidance prior to the issuance of ASU 2016-02, “Leases (Topic 842).”
Other Investments	Other Investments Other investments include equity investments in non-financial companies, as well as equity securities with no readily determinable fair market value. Equity investments are accounted for using the equity method of accounting. Due to timing issues in the accounting by some of the non-financial companies in which we hold an investment, activity recorded to our books is recorded one
Revenue recognition	Revenue Recognition
Income Taxes	Income Taxes Deferred income tax assets and liabilities are determined using the asset and liability method. Under this method, the net deferred tax asset or liability is determined based on the tax effects of the differences between the book and tax basis of the various balance sheet assets and liabilities and gives current recognition to changes in tax rates and laws. We file a consolidated federal income tax return with our subsidiaries. Recognition of deferred tax assets is based on management’s assessment that the benefit related to certain temporary differences, tax operating loss carry forwards, and tax credits are more likely than not to be realized. A valuation allowance is recorded for the amount of the deferred tax items for which it is more likely than not that the tax benefits will not be realized. We evaluate uncertain tax positions at the end of each reporting period. We may recognize the tax benefit from an uncertain tax position only if it is more likely than not that the tax position will be sustained on examination by the taxing authorities, based on the technical merits of the position. The tax benefit recognized in the financial statements from any such a position is measured based on the largest benefit that has a greater than fifty percent likelihood of being realized upon ultimate settlement. As of December 31, 2024 and 2023, respectively, after evaluating all uncertain tax positions, we have recorded no liability for unrecognized tax benefits at the end of the reporting period. We would recognize any interest accrued on unrecognized tax benefits as other interest expense and penalties as other non-interest expense. During the years ended December 31, 2024, 2023, and 2022, we recognized no interest expense or penalties related to uncertain tax positions. We file consolidated tax returns in the U.S. federal jurisdiction and various state jurisdictions. We are no longer subject to U.S. federal or state income tax examinations by tax authorities for years before 2021.
Stock Options and Stock Appreciation Rights	Stock Options and Stock Appreciation Rights Compensation expense for stock-based awards is based on the market price of the stock on the measurement date, which is generally the date of grant, and is recognized ratably over the service period of the award. The fair value of stock options and stock appreciation rights granted was estimated using a Black-Scholes-Merton pricing model. These models were developed for use in estimating the fair value of publicly traded options and stock appreciation rights that have no vesting restrictions and are fully transferable. Additionally, these models require the input of highly subjective assumptions. Because our employee stock options and stock appreciation rights have characteristics significantly different from those of publicly traded options and appreciation rights, and because changes in the subjective input assumptions can materially affect the fair value estimate, in management’s opinion, the Black-Scholes-Merton pricing models do not necessarily provide a reliable single measure of the fair value of our stock options and stock appreciation rights.
Net Income Per Share	Net Income Per Share Basic Earnings Per Share (“EPS”) is calculated by dividing net income by the weighted average number of common shares outstanding. The computation of diluted EPS assumes the issuance of common shares for all dilutive potential common shares outstanding during the reporting period. The dilutive effect of stock options is considered in earnings per share calculations, if dilutive, using the treasury stock method.
Goodwill and Identified Intangible Assets	Goodwill and Identified Intangible Assets Goodwill represents the excess of costs over fair value of assets of businesses acquired. Goodwill is tested for impairment at least annually or on an interim basis if an event triggering impairment may have occurred. As of October 1, 2024, after completing goodwill testing, we have determined that no goodwill impairment exists. There were no changes in the carrying amount of goodwill for the years ended December 31, 2024 and December 31, 2023. Identified intangible assets are acquired assets that lack physical substance but can be distinguished from goodwill because of contractual or other legal rights or because the asset is capable of being sold or exchanged either on its own or in combination with a related contract, asset, or liability.
Impairment of Long-Lived Assets	Impairment of Long-Lived Assets Long-lived assets, such as property, plant, and equipment, and purchased intangibles subject to amortization, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying value of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying value of the asset to the estimated undiscounted future cash flows expected to be generated by the asset. If the carrying value of an asset exceeds its estimated future cash flows, an impairment charge is recognized by the amount by which the carrying value of the asset exceeds the fair value of the asset. Assets to be disposed of would be separately presented in the statement of condition and reported at the lower of the carrying value or fair value less costs to sell and are no longer depreciated. The assets and liabilities of a disposed group classified as held for sale would be presented separately in the appropriate asset and liability sections of the statement of condition.
Consolidated Statements of Cash Flows	Consolidated Statements of Cash Flows For purposes of the consolidated statements of cash flows, we consider all short-term investments with a maturity at date of purchase of three months or less to be cash equivalents. Also, we report transactions related to deposits and loans to customers on a net basis.
Accounting for Transfers and Servicing of Financial Assets	Accounting for Transfers and Servicing of Financial Assets We account for transfers and servicing of financial assets and extinguishments of liabilities based on the application of a financial-components approach that focuses on control. After a transfer of financial assets, we recognize the financial and servicing assets we control and liabilities we have incurred, derecognize financial assets when control has been surrendered and derecognize liabilities when extinguished. We have retained mortgage servicing rights in connection with the sale of mortgage loans. Because we may not initially identify loans as originated for resale, all loans are initially treated as held for investment. The value of the mortgage servicing rights are reviewed periodically for impairment and are amortized in proportion to, and over the period of estimated net servicing income or net servicing losses. The value of the mortgage servicing rights is not significant to the consolidated statements of condition.
Segments of an Enterprise and Related Information	Segments of an Enterprise and Related Information We operate as one segment, banking. The chief operating decision maker (“CODM”) is our chief executive officer. The operating information used by our CODM for purposes of assessing performance and making operating decisions is the consolidated financial statements presented in this report. We have five active operating subsidiaries, namely, the Subsidiary Banks. Our Subsidiary Banks offer all products and services on the same basis and on the same terms and operate in the same regulatory environment. We apply the provisions of ASC Topic 280, “Segment Reporting,” in determining our reportable segments and related disclosures.
Comprehensive Income (Loss)	Comprehensive Income (Loss) Comprehensive income (loss) consists of net income and other comprehensive income (loss). Other comprehensive income (loss) includes unrealized gains and losses on securities available for sale.
Advertising	Advertising Advertising costs are expensed as incurred.
Reclassifications	Reclassifications Certain amounts in the prior year’s presentations have been reclassified to conform to the current presentation. These reclassifications had no effect on previously reported net income or shareholders’ equity.
New Accounting Standards	New Accounting Standards In March 2022, the FASB issued Accounting Standards Update No. 2022-02, Financial Instruments – Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures (“ASU 2022-02”). ASU 2022-02 eliminates the accounting guidance for troubled debt restructurings in existing guidance and enhances disclosure requirements for certain loan refinancings and restructurings when a borrower is experiencing financial difficulty. Additionally, ASU 2022-02 requires entities to disclose current period gross write-offs by year of origination for financing receivables and net investments in leases. We adopted the provisions of ASU 2022-02 on January 1, 2023 and it did not have a significant impact on our consolidated financial statements. date in which the SEC removal of the related disclosure from Regulation S-X or Regulation S-K, with early adoption prohibited. The adoption of ASU 2023-06 did not have a significant impact on our consolidated financial statements.

Investment Securities, Equity_2

Investment Securities, Equity Securities with Readily Determinable Fair Values and Other Investments (Tables)	12 Months Ended
	Dec. 31, 2024
Investment Securities, Equity Securities with Readily Determinable Fair Values and Other Investments
Amortized cost and estimated fair value by type of investment security	The amortized cost and estimated fair value by type of investment security at December 31, 2024 are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Held to Maturity ​ ​ ​ ​ ​ ​ Gross ​ Gross ​ ​ ​ ​ ​ ​ ​ ​ ​ Amortized ​ unrealized ​ unrealized ​ Estimated ​ Carrying ​ ​ ​ cost ​ gains ​ losses ​ fair value ​ value ​ ​ ​ (Dollars in Thousands) ​ Other securities $ 4,400 $ — $ — $ 4,400 $ 4,400 ​ Total investment securities ​ $ 4,400 ​ $ — ​ $ — ​ $ 4,400 ​ $ 4,400 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Available for Sale Debt Securities ​ ​ ​ ​ ​ ​ Gross ​ Gross ​ ​ ​ ​ ​ ​ ​ ​ ​ Amortized ​ unrealized ​ unrealized ​ Estimated ​ Carrying ​ ​ ​ cost ​ gains ​ losses ​ fair value ​ value (1) ​ ​ ​ (Dollars in Thousands) ​ Residential mortgage-backed securities ​ $ 5,315,488 ​ $ 8,858 ​ $ (489,170) ​ $ 4,835,176 ​ $ 4,835,176 ​ Obligations of states and political subdivisions ​ 156,822 ​ 331 ​ (4,413) ​ 152,740 ​ 152,740 ​ Total investment securities ​ $ 5,472,310 ​ $ 9,189 ​ $ (493,583) ​ $ 4,987,916 ​ $ 4,987,916 ​ (1) Included in the carrying value of residential mortgage- backed securities are $1,001,184 of mortgage-backed securities issued by Ginnie Mae and $3,833,992 of mortgage-backed securities issued by Fannie Mae and Freddie Mac The amortized cost and estimated fair value by type of investment security at December 31, 2023 are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Held to Maturity ​ ​ ​ ​ ​ ​ Gross ​ Gross ​ ​ ​ ​ ​ ​ ​ ​ ​ Amortized ​ unrealized ​ unrealized ​ Estimated ​ Carrying ​ ​ ​ cost ​ gains ​ losses ​ fair value ​ value ​ ​ ​ (Dollars in Thousands) ​ Other securities $ 3,400 $ — $ — $ 3,400 $ 3,400 ​ Total investment securities ​ $ 3,400 ​ $ — ​ $ — ​ $ 3,400 ​ $ 3,400 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Available for Sale ​ ​ ​ ​ ​ ​ Gross ​ Gross ​ Estimated ​ ​ ​ ​ ​ ​ Amortized ​ unrealized ​ unrealized ​ fair ​ Carrying ​ ​ ​ cost ​ gains ​ losses ​ value ​ value (1) ​ ​ ​ (Dollars in Thousands) ​ Residential mortgage-backed securities $ 5,169,813 ​ $ 9,541 ​ $ (519,255) ​ 4,660,099 ​ 4,660,099 ​ Obligations of states and political subdivisions ​ 161,001 ​ 1,602 ​ (361) ​ 162,242 ​ 162,242 ​ Total investment securities ​ $ 5,330,814 ​ $ 11,143 ​ $ (519,616) ​ $ 4,822,341 ​ $ 4,822,341 ​ (1) Included in the carrying value of residential mortgage- backed securities are $959,421 of mortgage-backed securities issued by Ginnie Mae, $3,700,678 of mortgage-backed securities issued by Fannie Mae and Freddie Mac
Amortized cost and fair value of investment securities, by contractual maturity	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Held to Maturity ​ Available for Sale ​ ​ ​ Amortized ​ Estimated ​ Amortized ​ Estimated ​ ​ ​ Cost ​ fair value ​ Cost ​ fair value ​ ​ ​ (Dollars in Thousands) ​ Due in one year or less $ 1,325 $ 1,325 $ — $ — ​ Due after one year through five years ​ 3,075 ​ 3,075 ​ — ​ ​ — ​ Due after five years through ten years ​ — ​ — ​ 1,442 ​ 1,438 ​ Due after ten years ​ — ​ — ​ 155,380 ​ 151,302 ​ Residential mortgage-backed securities ​ — ​ — ​ 5,315,488 ​ 4,835,176 ​ Total investment securities ​ $ 4,400 ​ $ 4,400 ​ $ 5,472,310 ​ $ 4,987,916 ​
Gross unrealized losses on debt investment securities and the related fair value	Gross unrealized losses on investment securities and the fair value of the related securities, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at December 31, 2024 were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Less than 12 months ​ 12 months or more ​ Total ​ ​ ​ ​ ​ ​ Unrealized ​ ​ ​ ​ Unrealized ​ ​ ​ ​ Unrealized ​ ​ ​ Fair Value ​ Losses ​ Fair Value ​ Losses ​ Fair Value ​ Losses ​ ​ ​ (Dollars in Thousands) ​ Available for sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential mortgage-backed securities $ 544,375 $ (4,126) $ 3,358,586 $ (485,044) $ 3,902,961 $ (489,170) ​ Obligations of states and political subdivisions ​ 66,450 ​ (2,389) ​ 57,551 ​ (2,024) ​ 124,001 ​ (4,413) ​ ​ ​ $ 610,825 ​ $ (6,515) ​ $ 3,416,137 ​ $ (487,068) ​ $ 4,026,962 ​ $ (493,583) ​ ​ Gross unrealized losses on investment securities and the fair value of the related securities, aggregated by investment category and length of time that individual securities have been in a continuous loss position, at December 31, 2023 were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Less than 12 months ​ 12 months or more ​ Total ​ ​ ​ ​ ​ Unrealized ​ ​ ​ ​ Unrealized ​ ​ ​ ​ Unrealized ​ ​ Fair Value ​ Losses ​ Fair Value ​ Losses ​ Fair Value ​ Losses ​ ​ (Dollars in Thousands) Available for sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential mortgage-backed securities $ 577,448 $ (8,267) $ 3,456,349 $ (510,988) $ 4,033,797 $ (519,255) Obligations of states and political subdivisions ​ 651 ​ (1) ​ 64,373 ​ (360) ​ 65,024 ​ (361) ​ ​ $ 578,099 ​ $ (8,268) ​ $ 3,520,722 ​ $ (511,348) ​ $ 4,098,821 ​ $ (519,616) ​
Summary of unrealized and realized gains and losses recognized in net income on equity securities	​ ​ ​ ​ ​ ​ ​ ​ Year Ended ​ ​ December 31, 2024 ​ ​ (Dollars in Thousands) ​ ​ ​ Net losses recognized during the period on equity securities $ ​ (24) Less: Net gains and (losses) recognized during the period on equity securities sold during the period ​ ​ — ​ ​ ​ ​ ​ Unrealized losses recognized during the reporting period on equity securities still held at the reporting date ​ $ ​ (24) ​ ​ ​ ​ ​ ​ ​ ​ Year Ended ​ ​ December 31, 2023 ​ ​ (Dollars in Thousands) ​ ​ ​ Net gains recognized during the period on equity securities $ ​ 59 Less: Net gains and (losses) recognized during the period on equity securities sold during the period ​ ​ — ​ ​ ​ ​ ​ Unrealized gains recognized during the reporting period on equity securities still held at the reporting date ​ $ ​ 59 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended ​ ​ December 31, 2022 ​ ​ (Dollars in Thousands) ​ ​ ​ Net losses recognized during the period on equity securities $ ​ (721) Less: Net gains and (losses) recognized during the period on equity securities sold during the period ​ ​ — ​ ​ ​ ​ ​ Unrealized losses recognized during the reporting period on equity securities still held at the reporting date ​ $ ​ (721)

Loans (Tables)

Loans (Tables)	12 Months Ended
	Dec. 31, 2024
Loans
Summary of loans, by loan type	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ December 31, ​ ​ ​ 2024 ​ 2023 ​ ​ ​ (Dollars in Thousands) ​ Commercial, financial and agricultural $ 5,089,721 $ 4,802,622 ​ Real estate - mortgage ​ 999,313 ​ 938,901 ​ Real estate - construction ​ 2,484,454 ​ 2,091,622 ​ Consumer ​ 49,777 ​ 45,121 ​ Foreign ​ 186,561 ​ 180,695 ​ Total loans ​ $ 8,809,826 ​ $ 8,058,961 ​ ​

Allowance for Credit Losses (Ta

Allowance for Credit Losses (Tables)	12 Months Ended
	Dec. 31, 2024
Allowance for Credit Losses
Schedule of commercial real estate loan portfolio disaggregated by the type of real estate securing the credit	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2024 ​ ​ December 31, 2023 ​ ​ ​ (Dollars in Thousands) ​ ​ (Dollars in Thousands) ​ ​ ​ Amount ​ Percent of Total ​ ​ Amount ​ Percent of Total ​ Commercial real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial real estate construction development ​ $ 1,313,984 ​ ​ 23.0 % ​ $ 1,035,936 ​ ​ 19.6 % Hotel ​ 1,080,706 ​ 18.9 ​ ​ 1,116,539 ​ 21.1 ​ Retail multi-tenant ​ 738,874 ​ 12.9 ​ ​ 699,145 ​ 13.2 ​ Lot development: residential and commercial lots ​ 513,760 ​ 9.0 ​ ​ 548,797 ​ 10.4 ​ Warehouse ​ 435,783 ​ 7.6 ​ ​ 355,635 ​ 6.7 ​ Office/Professional buildings ​ 416,014 ​ 7.3 ​ ​ 311,413 ​ 5.9 ​ 1 - 4 family construction ​ ​ 338,832 ​ ​ 5.9 ​ ​ ​ 329,828 ​ ​ 6.2 ​ Multi-family ​ ​ 310,115 ​ ​ 5.4 ​ ​ ​ 380,839 ​ ​ 7.2 ​ Owner occupied real estate ​ ​ 270,584 ​ ​ 4.7 ​ ​ ​ 246,797 ​ ​ 4.7 ​ Commercial leased properties ​ ​ 194,023 ​ ​ 3.4 ​ ​ ​ 167,539 ​ ​ 3.2 ​ Farmland ​ ​ 109,697 ​ ​ 1.9 ​ ​ ​ 97,812 ​ ​ 1.8 ​ Total commercial real estate ​ $ 5,722,372 ​ $ 100.0 % ​ $ 5,290,280 ​ $ 100.0 %
Loans individually or collectively evaluated for their impairment and related allowance, by loan class	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2024 ​ ​ Domestic ​ Foreign ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ other Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ construction & real estate: ​ Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ land ​ farmland & ​ real estate: ​ Residential: ​ Residential: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ development ​ commercial ​ multifamily ​ first lien ​ junior lien ​ Consumer ​ Foreign ​ Total ​ ​ (Dollars in Thousands) ​ Balance at December 31, 2023 $ 35,550 ​ $ 55,291 ​ $ 42,703 ​ $ 5,088 ​ $ 5,812 ​ $ 11,024 ​ $ 318 ​ $ 1,283 ​ $ 157,069 ​ Losses charged to allowance ​ (34,149) ​ (2,228) ​ ​ — ​ — ​ (46) ​ — ​ (185) ​ — ​ (36,608) ​ Recoveries credited to allowance ​ 4,079 ​ — ​ 20 ​ — ​ 38 ​ 123 ​ 13 ​ 1 ​ 4,274 ​ Net losses charged to allowance ​ (30,070) ​ (2,228) ​ 20 ​ — ​ (8) ​ 123 ​ (172) ​ 1 ​ (32,334) ​ Provision (credit) charged to operations ​ 24,373 ​ ​ 7,576 ​ 1,267 ​ (219) ​ (276) ​ (1,116) ​ 135 ​ 62 ​ 31,802 ​ Balance at December 31, 2024 ​ $ 29,853 ​ $ 60,639 ​ $ 43,990 ​ $ 4,869 ​ $ 5,528 ​ $ 10,031 ​ $ 281 ​ $ 1,346 ​ $ 156,537 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2023 ​ ​ Domestic ​ Foreign ​ ​ ​ ​ ​ ​ ​ Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ other Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ construction & real estate: ​ Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ land ​ farmland & ​ real estate: ​ Residential: ​ Residential: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial development ​ commercial ​ multifamily ​ first lien ​ junior lien ​ Consumer ​ Foreign ​ Total ​ ​ (Dollars in Thousands) ​ Balance at December 31, 2022 $ 26,728 ​ $ 44,684 ​ $ 36,474 ​ $ 3,794 ​ $ 4,759 ​ $ 8,284 ​ $ 281 ​ $ 968 $ 125,972 ​ Losses charged to allowance ​ (9,664) ​ — ​ ​ — ​ — ​ (43) ​ (298) ​ (179) ​ — ​ (10,184) ​ Recoveries credited to allowance ​ 5,433 ​ 837 ​ 143 ​ — ​ 16 ​ 260 ​ 16 ​ — ​ 6,705 ​ Net losses charged to allowance ​ (4,231) ​ 837 ​ 143 ​ — ​ (27) ​ (38) ​ (163) ​ — ​ (3,479) ​ Provision (credit) charged to operations ​ 13,053 ​ ​ 9,770 ​ 6,086 ​ 1,294 ​ 1,080 ​ 2,778 ​ 200 ​ 315 ​ 34,576 ​ Balance at December 31, 2023 ​ $ 35,550 ​ $ 55,291 ​ $ 42,703 ​ $ 5,088 ​ $ 5,812 ​ $ 11,024 ​ $ 318 ​ $ 1,283 ​ $ 157,069 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2022 ​ ​ Domestic ​ Foreign ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ other Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ construction & real estate: ​ Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ land ​ farmland & ​ real estate: ​ Residential: ​ Residential: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial development ​ commercial ​ multifamily ​ first lien ​ junior lien ​ Consumer ​ Foreign ​ Total ​ (Dollars in Thousands) Balance at December 31, 2021 $ 23,178 ​ $ 35,390 ​ $ 35,654 ​ $ 3,291 ​ $ 4,073 ​ $ 7,754 ​ $ 272 ​ $ 762 $ 110,374 ​ Losses charged to allowance ​ (9,050) ​ (2) ​ ​ (16) ​ — ​ (160) ​ (28) ​ (223) ​ — ​ (9,479) ​ Recoveries credited to allowance ​ 2,894 ​ 123 ​ 27 ​ — ​ 240 ​ 104 ​ 38 ​ — ​ 3,426 ​ Net losses charged to allowance ​ (6,156) ​ 121 ​ 11 ​ — ​ 80 ​ 76 ​ (185) ​ — ​ (6,053) ​ Provision (credit) charged to operations ​ 9,706 ​ ​ 9,173 ​ 809 ​ 503 ​ 606 ​ 454 ​ 194 ​ 206 ​ 21,651 ​ Balance at December 31, 2022 ​ $ 26,728 ​ $ 44,684 ​ $ 36,474 ​ $ 3,794 ​ $ 4,759 ​ $ 8,284 ​ $ 281 ​ $ 968 ​ $ 125,972 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2024 ​ ​ ​ Loans Individually ​ Loans Collectively ​ ​ ​ Evaluated For ​ Evaluated For ​ ​ ​ Impairment ​ Impairment ​ ​ ​ Recorded ​ ​ ​ ​ Recorded ​ ​ ​ ​ ​ ​ Investment ​ Allowance ​ Investment ​ Allowance ​ ​ ​ (Dollars in Thousands) ​ Domestic ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial $ 52,110 $ 400 $ 1,799,693 $ 29,453 ​ Commercial real estate: other construction & land development ​ 8,195 ​ 8,122 ​ 2,476,259 ​ 52,517 ​ Commercial real estate: farmland & commercial ​ 65,733 ​ 8,228 ​ 2,862,070 ​ 35,762 ​ Commercial real estate: multifamily ​ 42,964 ​ 1,882 ​ 267,151 ​ 2,987 ​ Residential: first lien ​ 45 ​ — ​ 530,039 ​ 5,528 ​ Residential: junior lien ​ 141 ​ — ​ 469,088 ​ 10,031 ​ Consumer ​ — ​ — ​ 49,777 ​ 281 ​ Foreign ​ — ​ — ​ 186,561 ​ 1,346 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 169,188 ​ $ 18,632 ​ $ 8,640,638 ​ $ 137,905 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2023 ​ ​ ​ Loans Individually ​ Loans Collectively ​ ​ ​ Evaluated For ​ Evaluated For ​ ​ ​ Impairment ​ Impairment ​ ​ ​ Recorded ​ ​ ​ ​ Recorded ​ ​ ​ ​ ​ ​ Investment ​ Allowance ​ Investment ​ Allowance ​ ​ ​ (Dollars in Thousands) ​ Domestic ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial $ 30,872 $ 7,971 $ 1,597,358 $ 27,579 ​ Commercial real estate: other construction & land development ​ 15,701 ​ 4,320 ​ 2,075,921 ​ 50,971 ​ Commercial real estate: farmland & commercial ​ 299 ​ — ​ 2,793,254 ​ 42,703 ​ Commercial real estate: multifamily ​ 96 ​ — ​ 380,743 ​ 5,088 ​ Residential: first lien ​ 93 ​ — ​ 477,940 ​ 5,812 ​ Residential: junior lien ​ — ​ — ​ 460,868 ​ 11,024 ​ Consumer ​ — ​ — ​ 45,121 ​ 318 ​ Foreign ​ — ​ — ​ 180,695 ​ 1,283 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 47,061 ​ $ 12,291 ​ $ 8,011,900 ​ $ 144,778 ​
Loans accounted on non-accrual basis, by loan class	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2024 ​ December 31, 2023 ​ ​ ​ (Dollars in Thousands) ​ ​ ​ ​ Total Non-Accrual Loans ​ Non-Accrual Loans with No Credit Allowance ​ Total Non-Accrual Loans ​ Non-Accrual Loans with No Credit Allowance ​ Domestic ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial $ 52,110 ​ $ 51,276 ​ $ 30,872 ​ $ 122 ​ Commercial real estate: other construction & land development ​ 8,195 ​ 73 ​ 15,701 ​ 5,400 ​ Commercial real estate: farmland & commercial ​ 65,733 ​ 24,757 ​ 299 ​ 211 ​ Commercial real estate: multifamily ​ 42,964 ​ 73 ​ 96 ​ 96 ​ Residential: first lien ​ 134 ​ 134 ​ 202 ​ 172 ​ Total non-accrual loans ​ $ 169,136 ​ $ 76,313 ​ $ 47,170 ​ $ 6,001 ​
Information regarding the aging of past due loans, by loan class	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2024 ​ ​ ​ ​ ​ ​ ​ ​ ​ 90 Days or Total ​ ​ ​ ​ ​ ​ ​ 30 - 59 ​ 60 - 89 ​ 90 Days or ​ greater & ​ Past ​ ​ ​ ​ Total ​ ​ ​ Days ​ Days ​ Greater ​ still accruing ​ Due ​ Current ​ Portfolio ​ ​ ​ (Dollars in Thousands) ​ Domestic ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial $ 4,070 $ 51,577 $ 579 $ 534 $ 56,226 $ 1,795,577 $ 1,851,803 ​ Commercial real estate: other construction & land development ​ 2,421 ​ 15 ​ 8,122 ​ — ​ 10,558 ​ 2,473,896 ​ 2,484,454 ​ Commercial real estate: farmland & commercial ​ 1,221 ​ — ​ 26,416 ​ 262 ​ 27,637 ​ 2,900,166 ​ 2,927,803 ​ Commercial real estate: multifamily ​ — ​ 270 ​ 25,064 ​ — ​ 25,334 ​ 284,781 ​ 310,115 ​ Residential: first lien ​ 4,763 ​ 1,337 ​ 3,631 ​ 3,542 ​ 9,731 ​ 520,353 ​ 530,084 ​ Residential: junior lien ​ 2,599 ​ 1,544 ​ 2,000 ​ 2,000 ​ 6,143 ​ 463,086 ​ 469,229 ​ Consumer ​ 122 ​ 32 ​ 16 ​ 16 ​ 170 ​ 49,607 ​ 49,777 ​ Foreign ​ 816 ​ 1,992 ​ 339 ​ 339 ​ 3,147 ​ 183,414 ​ 186,561 ​ Total past due loans ​ $ 16,012 ​ $ 56,767 ​ $ 66,167 ​ $ 6,693 ​ $ 138,946 ​ $ 8,670,880 ​ $ 8,809,826 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 90 Days or ​ Total ​ ​ ​ ​ ​ ​ ​ ​ ​ 30 - 59 ​ 60 - 89 ​ 90 Days or ​ greater & ​ Past ​ ​ ​ ​ Total ​ ​ ​ Days ​ Days ​ Greater ​ still accruing ​ Due ​ Current ​ Portfolio ​ ​ ​ (Dollars in Thousands) ​ Domestic ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ $ 2,387 $ 1,583 $ 30,238 $ 539 $ 34,208 $ 1,594,022 $ 1,628,230 ​ Commercial real estate: other construction & land development ​ 3,460 ​ — ​ 10,245 ​ — ​ 13,705 ​ 2,077,917 ​ 2,091,622 ​ Commercial real estate: farmland & commercial ​ 1,424 ​ 371 ​ 93 ​ 4 ​ 1,888 ​ 2,791,665 ​ 2,793,553 ​ Commercial real estate: multifamily ​ 369 ​ 330 ​ — ​ — ​ 699 ​ 380,140 ​ 380,839 ​ Residential: first lien ​ 1,812 ​ 1,439 ​ 2,545 ​ 2,437 ​ 5,796 ​ 472,236 ​ 478,032 ​ Residential: junior lien ​ 1,273 ​ 613 ​ 1,701 ​ 1,701 ​ 3,587 ​ 457,282 ​ 460,869 ​ Consumer ​ 263 ​ 11 ​ 27 ​ 27 ​ 301 ​ 44,820 ​ 45,121 ​ Foreign ​ 1,884 ​ 848 ​ 889 ​ 889 ​ 3,621 ​ 177,074 ​ 180,695 ​ Total past due loans ​ $ 12,872 ​ $ 5,195 ​ $ 45,738 ​ $ 5,597 ​ $ 63,805 ​ $ 7,995,156 ​ $ 8,058,961 ​
Summary of the loan portfolio by credit quality indicator, by loan class	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2024 2023 2022 2021 2020 Prior Total ​ ​ ​ (Dollars in Thousands) ​ Balance at December 31, 2024 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Domestic ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 993,045 ​ $ 343,212 ​ $ 135,057 ​ $ 214,702 ​ $ 37,670 ​ $ 63,030 ​ $ 1,786,716 ​ Watch List - Pass ​ ​ — ​ ​ 11,113 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 11,113 ​ Watch List - Substandard ​ ​ 1,341 ​ ​ 327 ​ ​ 74 ​ ​ 122 ​ ​ — ​ ​ — ​ ​ 1,864 ​ Watch List - Doubtful ​ ​ 881 ​ ​ 51,184 ​ ​ 45 ​ ​ — ​ ​ — ​ ​ — ​ ​ 52,110 ​ Total Commercial ​ $ 995,267 ​ $ 405,836 ​ $ 135,176 ​ $ 214,824 ​ $ 37,670 ​ $ 63,030 ​ $ 1,851,803 ​ Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross writeoffs ​ $ 5,711 ​ $ 2,689 ​ $ 25,686 ​ $ 44 ​ $ 14 ​ $ 5 ​ $ 34,149 ​ Commercial real estate: other construction & land development ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 1,029,399 ​ $ 921,180 ​ $ 322,348 ​ $ 144,221 ​ $ 39,908 ​ $ 2,925 ​ $ 2,459,981 ​ Special Review ​ ​ — ​ ​ 16,000 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 16,000 ​ Watch List - Substandard ​ ​ 278 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 278 ​ Watch List - Doubtful ​ ​ 73 ​ ​ — ​ ​ 8,122 ​ ​ — ​ ​ — ​ ​ — ​ ​ 8,195 ​ Total Commercial real estate: other construction & land development ​ $ 1,029,750 ​ $ 937,180 ​ $ 330,470 ​ $ 144,221 ​ $ 39,908 ​ $ 2,925 ​ $ 2,484,454 ​ Commercial real estate: other construction & land development ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross writeoffs ​ $ — ​ $ 1,146 ​ $ 1,082 ​ $ — ​ $ — ​ $ — ​ $ 2,228 ​ Commercial real estate: farmland & commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 814,273 ​ $ 631,806 ​ $ 531,035 ​ $ 312,757 ​ $ 220,510 ​ $ 245,334 ​ $ 2,755,715 ​ Special Review ​ ​ 643 ​ ​ 67,567 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 68,210 ​ Watch List - Pass ​ ​ 16,490 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 16,490 ​ Watch List - Substandard ​ ​ 18,934 ​ ​ 242 ​ ​ 2,122 ​ ​ — ​ ​ 357 ​ ​ — ​ ​ 21,655 ​ Watch List - Doubtful ​ ​ 52,973 ​ ​ 115 ​ ​ 12,645 ​ ​ — ​ ​ — ​ ​ — ​ ​ 65,733 ​ Total Commercial real estate: farmland & commercial ​ $ 903,313 ​ $ 699,730 ​ $ 545,802 ​ $ 312,757 ​ $ 220,867 ​ $ 245,334 ​ $ 2,927,803 ​ Commercial real estate: multifamily ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 90,092 ​ $ 11,538 ​ $ 108,830 ​ $ 18,621 ​ $ 8,198 ​ $ 29,871 ​ $ 267,150 ​ Watch List - Doubtful ​ ​ 17,901 ​ ​ 25,064 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 42,965 ​ Total Commercial real estate: multifamily ​ $ 107,993 ​ $ 36,602 ​ $ 108,830 ​ $ 18,621 ​ $ 8,198 ​ $ 29,871 ​ $ 310,115 ​ Residential: first lien ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 180,743 ​ $ 107,100 ​ $ 81,618 ​ $ 57,503 ​ $ 29,316 ​ $ 73,390 ​ $ 529,670 ​ Watch List - Substandard ​ ​ 95 ​ ​ — ​ ​ — ​ ​ 274 ​ ​ — ​ ​ — ​ ​ 369 ​ Watch List - Doubtful ​ ​ 23 ​ ​ — ​ ​ 22 ​ ​ — ​ ​ — ​ ​ — ​ ​ 45 ​ Total Residential: first lien ​ $ 180,861 ​ $ 107,100 ​ $ 81,640 ​ $ 57,777 ​ $ 29,316 ​ $ 73,390 ​ $ 530,084 ​ Residential: first lien ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross writeoffs ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 46 ​ $ 46 ​ Residential: junior lien ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 91,202 ​ $ 73,740 ​ $ 65,144 ​ $ 70,969 ​ $ 65,799 ​ $ 102,234 ​ $ 469,088 ​ Watch List- Doubtful ​ ​ 141 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 141 ​ Total Residential: junior lien ​ $ 91,343 ​ $ 73,740 ​ $ 65,144 ​ $ 70,969 ​ $ 65,799 ​ $ 102,234 ​ $ 469,229 ​ Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 38,778 ​ $ 8,137 ​ $ 904 ​ $ 422 ​ $ 22 ​ $ 1,514 ​ $ 49,777 ​ Total Consumer ​ $ 38,778 ​ $ 8,137 ​ $ 904 ​ $ 422 ​ $ 22 ​ $ 1,514 ​ $ 49,777 ​ Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross writeoffs ​ $ 43 ​ $ 120 ​ $ 22 ​ $ — ​ $ — ​ $ — ​ $ 185 ​ Foreign ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 124,716 ​ $ 30,648 ​ $ 16,877 ​ $ 6,962 ​ $ 2,879 ​ $ 4,479 ​ $ 186,561 ​ Total Foreign ​ $ 124,716 ​ $ 30,648 ​ $ 16,877 ​ $ 6,962 ​ $ 2,879 ​ $ 4,479 ​ $ 186,561 ​ Total Loans ​ $ 3,472,021 ​ $ 2,298,973 ​ $ 1,284,843 ​ $ 826,553 ​ $ 404,659 ​ $ 522,777 ​ $ 8,809,826 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2023 2022 2021 2020 2019 Prior Total ​ ​ (Dollars in Thousands) Balance at December 31, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Domestic ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 791,233 ​ $ 272,919 ​ $ 364,271 ​ $ 50,602 ​ $ 21,468 ​ $ 74,119 ​ $ 1,574,612 Special Review ​ ​ 7,613 ​ ​ 1,800 ​ ​ 164 ​ ​ — ​ ​ — ​ ​ — ​ ​ 9,577 Watch List - Pass ​ ​ 11,865 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 11,865 Watch List - Substandard ​ ​ 1,180 ​ ​ 92 ​ ​ 28 ​ ​ — ​ ​ — ​ ​ 4 ​ ​ 1,304 Watch List - Doubtful ​ ​ 27 ​ ​ 30,810 ​ ​ 35 ​ ​ — ​ ​ — ​ ​ — ​ ​ 30,872 Total Commercial ​ $ 811,918 ​ $ 305,621 ​ $ 364,498 ​ $ 50,602 ​ $ 21,468 ​ $ 74,123 ​ $ 1,628,230 Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross writeoffs ​ $ 7,053 ​ $ 2,187 ​ $ 155 ​ $ 264 ​ $ 2 ​ $ 3 ​ $ 9,664 Commercial real estate: other construction & land development ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 938,739 ​ $ 674,037 ​ $ 324,238 ​ $ 96,400 ​ $ 14,058 ​ $ 3,219 ​ $ 2,050,691 Watch List - Substandard ​ ​ 25,230 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 25,230 Watch List - Doubtful ​ ​ 2,726 ​ ​ 12,975 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 15,701 Total Commercial real estate: other construction & land development ​ $ 966,695 ​ $ 687,012 ​ $ 324,238 ​ $ 96,400 ​ $ 14,058 ​ $ 3,219 ​ $ 2,091,622 Commercial real estate: farmland & commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 888,878 ​ $ 628,653 ​ $ 415,458 ​ $ 267,705 ​ $ 184,164 ​ $ 248,626 ​ $ 2,633,484 Special Review ​ ​ 5,205 ​ ​ — ​ ​ 3,357 ​ ​ — ​ ​ — ​ ​ — ​ ​ 8,562 Watch List - Pass ​ ​ 16,654 ​ ​ 87 ​ ​ 233 ​ ​ — ​ ​ — ​ ​ — ​ ​ 16,974 Watch List - Substandard ​ ​ 129,644 ​ ​ 2,201 ​ ​ — ​ ​ 2,304 ​ ​ 84 ​ ​ 1 ​ ​ 134,234 Watch List - Doubtful ​ ​ 211 ​ ​ 88 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 299 Total Commercial real estate: farmland & commercial ​ $ 1,040,592 ​ $ 631,029 ​ $ 419,048 ​ $ 270,009 ​ $ 184,248 ​ $ 248,627 ​ $ 2,793,553 Commercial real estate: multifamily ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 123,523 ​ $ 94,551 ​ $ 42,081 ​ $ 73,652 ​ $ 10,743 ​ $ 36,193 ​ $ 380,743 Watch List - Doubtful ​ ​ — ​ ​ 96 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 96 Total Commercial real estate: multifamily ​ $ 123,523 ​ $ 94,647 ​ $ 42,081 ​ $ 73,652 ​ $ 10,743 ​ $ 36,193 ​ $ 380,839 Residential: first lien ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 180,127 ​ $ 83,568 ​ $ 68,082 ​ $ 39,935 ​ $ 27,499 ​ $ 78,306 ​ $ 477,517 Watch List - Substandard ​ ​ — ​ ​ — ​ ​ 327 ​ ​ — ​ ​ — ​ ​ 95 ​ ​ 422 Watch List - Doubtful ​ ​ — ​ ​ 93 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 93 Total Residential: first lien ​ $ 180,127 ​ $ 83,661 ​ $ 68,409 ​ $ 39,935 ​ $ 27,499 ​ $ 78,401 ​ $ 478,032 Residential: first lien ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross writeoffs ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 43 ​ $ 43 Residential: junior lien ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 88,628 ​ $ 76,845 ​ $ 96,411 ​ $ 76,490 ​ $ 34,870 ​ $ 87,625 ​ $ 460,869 Total Residential: junior lien ​ $ 88,628 ​ $ 76,845 ​ $ 96,411 ​ $ 76,490 ​ $ 34,870 ​ $ 87,625 ​ $ 460,869 Residential: junior lien ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross writeoffs ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 298 ​ $ 298 Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 36,639 ​ $ 5,366 ​ $ 1,043 ​ $ 237 ​ $ 157 ​ $ 1,679 ​ $ 45,121 Total Consumer ​ $ 36,639 ​ $ 5,366 ​ $ 1,043 ​ $ 237 ​ $ 157 ​ $ 1,679 ​ $ 45,121 Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross writeoffs ​ $ 54 ​ $ 115 ​ $ 9 ​ $ — ​ $ 1 ​ $ — ​ $ 179 Foreign ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 116,104 ​ $ 43,842 ​ $ 12,317 ​ $ 2,016 ​ $ 2,797 ​ $ 3,619 ​ $ 180,695 Total Foreign ​ $ 116,104 ​ $ 43,842 ​ $ 12,317 ​ $ 2,016 ​ $ 2,797 ​ $ 3,619 ​ $ 180,695 Total Loans ​ $ 3,364,226 ​ $ 1,928,023 ​ $ 1,328,045 ​ $ 609,341 ​ $ 295,840 ​ $ 533,486 ​ $ 8,058,961

Bank Premises and Equipment (Ta

Bank Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2024
Bank Premises and Equipment
Summary of bank premises and equipment, by asset classification	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Estimated ​ ​ ​ ​ ​ ​ ​ ​ useful lives ​ 2024 ​ 2023 ​ ​ ​ ​ ​ ​ ​ (Dollars in Thousands) Bank buildings and improvements 5 - 39 years $ 588,093 $ 582,075 ​ Furniture, equipment and vehicles 1 - 20 years ​ 331,200 ​ 325,855 ​ Land ​ ​ ​ ​ ​ ​ 110,919 ​ 108,551 ​ Less: accumulated depreciation ​ ​ ​ ​ ​ ​ (601,991) ​ (579,387) ​ Bank premises and equipment, net ​ ​ ​ ​ ​ ​ $ 428,221 ​ $ 437,094 ​ ​

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2024
Deposits.
Schedule of deposits and related interest expense	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2024 ​ 2023 ​ ​ (Dollars in Thousands) Deposits: ​ ​ ​ Demand - non-interest bearing ​ ​ ​ ​ ​ ​ ​ Domestic ​ $ 3,790,875 ​ $ 4,126,635 ​ Foreign ​ 821,469 ​ 904,210 ​ Total demand non-interest bearing ​ 4,612,344 ​ 5,030,845 ​ Savings and interest bearing demand ​ ​ ​ ​ ​ ​ ​ Domestic ​ 3,317,461 ​ 3,161,411 ​ Foreign ​ 1,282,496 ​ 1,207,121 ​ Total savings and interest bearing demand ​ 4,599,957 ​ 4,368,532 ​ Time, certificates of deposit $100,000 or more ​ ​ ​ ​ ​ ​ ​ Domestic ​ 876,254 ​ 763,419 ​ Foreign ​ 1,390,566 ​ 1,103,710 ​ Less than $100,000 ​ ​ ​ ​ ​ ​ ​ Domestic ​ 317,220 ​ 289,565 ​ Foreign ​ 315,503 ​ 268,483 ​ Total time, certificates of deposit ​ 2,899,543 ​ 2,425,177 ​ Total deposits ​ $ 12,111,844 ​ $ 11,824,554 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2024 ​ 2023 ​ 2022 ​ ​ (Dollars in Thousands) Interest expense: ​ ​ ​ ​ Savings and interest bearing demand ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Domestic $ 56,759 ​ $ 42,148 ​ $ 9,196 ​ Foreign ​ 25,153 ​ 18,189 ​ 3,490 ​ Total savings and interest bearing demand ​ 81,912 ​ 60,337 ​ 12,686 ​ Time, certificates of deposit $100,000 or more ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Domestic ​ 32,283 ​ 18,597 ​ 5,528 ​ Foreign ​ 47,420 ​ 25,471 ​ 3,867 ​ Less than $100,000 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Domestic ​ 8,748 ​ 4,592 ​ 1,027 ​ Foreign ​ 8,517 ​ 4,498 ​ 735 ​ Total time, certificates of deposit ​ 96,968 ​ 53,158 ​ 11,157 ​ Total interest expense on deposits ​ $ 178,880 ​ $ 113,495 ​ $ 23,843 ​ ​
Scheduled maturities of time deposits	Scheduled maturities of time deposits as of December 31, 2024 were as follows: ​ ​ ​ ​ ​ ​ ​ Total ​ ​ (in thousands) 2025 ​ $ 2,730,997 ​ 2026 ​ 119,228 ​ 2027 ​ 32,607 ​ 2028 ​ 16,285 ​ 2029 ​ 424 ​ Thereafter ​ 2 ​ Total ​ $ 2,899,543 ​
Scheduled maturities of time deposits in amounts of $100,000 or more	​ ​ ​ ​ ​ ​ ​ Total ​ ​ (in thousands) Due within 3 months or less $ 982,133 Due after 3 months and within 6 months ​ 698,349 Due after 6 months and within 12 months ​ 465,005 Due after 12 months ​ 121,333 ​ ​ $ 2,266,820

Securities Sold Under Repurch_2

Securities Sold Under Repurchase Agreements (Tables)	12 Months Ended
	Dec. 31, 2024
Securities Sold Under Repurchase Agreements
Schedule of repurchase agreements	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Collateral Securities ​ Repurchase Borrowing ​ ​ Book Value of ​ Fair Value of ​ Balance of ​ Weighted Average ​ ​ Securities Sold ​ Securities Sold ​ Liability ​ Interest Rate ​ ​ (Dollars in Thousands) December 31, 2024 term: ​ ​ ​ ​ Overnight agreements ​ $ 775,760 ​ $ 687,091 ​ $ 523,152 3.09 % 1 to 29 days ​ 15,872 ​ 13,604 ​ 11,100 4.75 ​ 30 to 90 days ​ — ​ — ​ — — ​ Over 90 days ​ 1,914 ​ 1,871 ​ 1,070 4.00 ​ Total ​ $ 793,546 ​ $ 702,566 ​ $ 535,322 3.12 % December 31, 2023 term: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Overnight agreements ​ $ 667,647 ​ $ 587,673 ​ $ 518,650 3.76 % 1 to 29 days ​ 24,842 ​ 20,454 ​ 10,696 4.50 ​ 30 to 90 days ​ — ​ — ​ — — ​ Over 90 days ​ 1,623 ​ 1,574 ​ 1,070 4.00 ​ Total ​ $ 694,112 ​ $ 609,701 ​ $ 530,416 3.78 %

Other Borrowed Funds (Tables)

Other Borrowed Funds (Tables)	12 Months Ended
	Dec. 31, 2024
Other Borrowed Funds
Schedule of other borrowed funds	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ ​ 2024 ​ 2023 ​ ​ (Dollars in Thousands) Federal Home Loan Bank advances—long-term(1) ​ ​ ​ ​ ​ ​ ​ Balance at year end ​ $ 10,541 ​ $ 10,745 ​ Rate on balance outstanding at year end ​ 2.61 % 2.61 % Average daily balance ​ $ 10,635 ​ $ 10,837 ​ Average rate ​ 2.61 % 2.61 % Maximum amount outstanding at any month end ​ $ 10,729 ​ $ 10,928 ​ (1) Long-term advances at December 31, 2024 and December 31, 2023 consisted of amortizing advances. Two amortizing advances are outstanding at December 31, 2024 in the amounts of $2,852,000 and $7,689,000 and mature in December 2033 and November 2033, respectively. The amortization on the amortizing long-term advances totals approximately $210,000 , $215,000 , $221,000 , $227,000 and $233,000 for the years ending December 31, 2025, 2026, 2027, 2028 and December 31, 2029, respectively .

Junior Subordinated Interest _2

Junior Subordinated Interest Deferrable Debentures (Tables)	12 Months Ended
	Dec. 31, 2024
Junior Subordinated Interest Deferrable Debentures
Junior subordinated interest deferrable debentures, major types of business trusts	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Junior ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Subordinated ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Deferrable ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest ​ Repricing ​ Interest ​ Interest ​ ​ ​ Optional ​ ​ ​ Debentures ​ Frequency ​ Rate ​ Rate Index (1) ​ Maturity Date ​ Redemption Date (2) ​ ​ ​ (Dollars in Thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Trust IX ​ $ 41,238 Quarterly 6.47 % SOFR + 1.62 October 2036 October 2011 ​ Trust X ​ 21,021 Quarterly 6.48 % SOFR + 1.65 February 2037 February 2012 ​ Trust XI ​ 25,990 Quarterly 6.47 % SOFR + 1.62 July 2037 July 2012 ​ Trust XII ​ 20,619 Quarterly 6.21 % SOFR + 1.45 September 2037 September 2012 ​ ​ ​ $ 108,868 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (1) On July 1, 2023, the interest rate index on the Capital and Common Securities transitioned from U.S.-dollar London Interbank Offered Rate (“LIBOR”) to the Three-Month CME Term Secured Overnight Financing rate (“SOFR”) with a 26 -basis point spread adjustment. (2) The Capital Securities may be redeemed in whole or in part on any interest payment date after the Optional Redemption Date.

Earnings per Share ("EPS") (Tab

Earnings per Share ("EPS") (Tables)	12 Months Ended
	Dec. 31, 2024
Earnings Per Share [Abstract]
Schedule of calculation of the basic EPS and the diluted EPS	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net Income ​ Shares ​ Per Share ​ ​ (Numerator) ​ (Denominator) ​ Amount ​ ​ (Dollars in Thousands, ​ ​ Except Per Share Amounts) December 31, 2024: ​ ​ ​ Basic EPS ​ ​ ​ ​ ​ ​ ​ ​ ​ Net income available to common shareholders ​ $ 409,167 62,180,448 ​ $ 6.58 ​ Potential dilutive common shares ​ — 117,830 ​ ​ ​ ​ Diluted EPS ​ $ 409,167 62,298,278 ​ $ 6.57 ​ December 31, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ Basic EPS ​ ​ ​ ​ ​ ​ ​ ​ ​ Net income available to common shareholders ​ $ 411,768 62,082,827 ​ $ 6.63 ​ Potential dilutive common shares ​ — 138,774 ​ ​ ​ ​ Diluted EPS ​ $ 411,768 62,221,601 ​ $ 6.62 ​ December 31, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ Basic EPS ​ ​ ​ ​ ​ ​ ​ ​ ​ Net income available to common shareholders ​ $ 300,232 62,658,414 ​ $ 4.79 ​ Potential dilutive common shares ​ — 151,820 ​ ​ ​ ​ Diluted EPS ​ $ 300,232 62,810,234 ​ $ 4.78 ​ ​

International Operations (Table

International Operations (Tables)	12 Months Ended
	Dec. 31, 2024
International Operations
Summary of assets attributable to international operations	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2024 ​ 2023 ​ ​ (Dollars in Thousands) Loans: ​ ​ ​ Commercial ​ $ 99,836 ​ $ 106,241 ​ Others ​ 86,725 ​ 74,454 ​ ​ ​ 186,561 ​ 180,695 ​ Less allowance for probable credit losses ​ (1,346) ​ (1,283) ​ Net loans ​ $ 185,215 ​ $ 179,412 ​ Accrued interest receivable ​ $ 991 ​ $ 515 ​

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2024
Income Taxes
Schedule of current and deferred portions of net income tax expense	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2024 ​ 2023 ​ 2022 ​ ​ (Dollars in Thousands) Current ​ ​ ​ ​ U.S. ​ $ 105,114 ​ $ 82,657 ​ $ 66,670 ​ State ​ 5,905 ​ 6,137 ​ 5,118 ​ Total current taxes ​ 111,019 ​ 88,794 ​ 71,788 ​ Deferred ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. ​ (11,430) ​ 23,001 ​ 10,555 ​ State ​ (36) ​ (51) ​ 64 ​ Total deferred taxes ​ (11,466) ​ 22,950 ​ 10,619 ​ Total income taxes ​ $ 99,553 ​ $ 111,744 ​ $ 82,407 ​
Schedule of income tax expense differences from the amount computed by applying the U.S. Federal income tax rate to income before income taxes	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2024 ​ 2023 ​ 2022 ​ ​ (Dollars in Thousands) Computed expected tax expense $ 107,134 $ 110,065 $ 80,893 ​ Change in taxes resulting from: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Tax-exempt interest income ​ (3,233) ​ (3,663) ​ (2,433) ​ State tax, net of federal income taxes, tax credit and refunds ​ 4,636 ​ 4,808 ​ 4,094 ​ Other investment income ​ (2,626) ​ (2,761) ​ (1,391) ​ Net investment in low income housing investments ​ ​ (2,531) ​ ​ 1,974 ​ ​ 1,906 ​ Other ​ (3,827) ​ 1,321 ​ (662) ​ Actual tax expense ​ $ 99,553 ​ $ 111,744 ​ $ 82,407 ​
Schedule of tax effects of temporary difference that give rise to significant portions of the deferred tax assets and deferred tax liabilities	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2024 ​ 2023 ​ ​ (Dollars in Thousands) Deferred tax assets: ​ ​ ​ Loans receivable, principally due to the allowance for probable loan losses ​ $ 40,883 ​ $ 32,136 ​ Other real estate owned ​ 1,443 ​ 1,649 ​ Accrued expenses ​ 539 ​ 581 ​ Net unrealized losses on available for sale investment securities ​ ​ 105,339 ​ ​ 110,584 ​ Other ​ 1,480 ​ 1,352 ​ Total deferred tax assets ​ 149,684 ​ 146,302 ​ Deferred tax liabilities: ​ ​ ​ ​ ​ ​ ​ Bank premises and equipment, principally due to differences on depreciation ​ (14,648) ​ (14,879) ​ Impairment charges on available-for-sale securities ​ ​ (19) ​ ​ (19) ​ Identified intangible assets and goodwill ​ (14,151) ​ (14,151) ​ Partnership investment pass through ​ ​ (55,117) ​ ​ (58,376) ​ Other ​ (4,189) ​ (3,321) ​ Total deferred tax liabilities ​ (88,124) ​ (90,746) ​ Net deferred tax asset ​ $ 61,560 ​ $ 55,556 ​

Stock Options and Stock Appre_2

Stock Options and Stock Appreciation Rights (Tables)	12 Months Ended
	Dec. 31, 2024
Stock Options and Stock Appreciation Rights
Summary of option activity under stock option plans	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ ​ ​ ​ ​ ​ Weighted ​ average ​ ​ ​ ​ ​ ​ ​ ​ average ​ remaining ​ Aggregate ​ ​ ​ Number of ​ exercise ​ contractual ​ intrinsic ​ ​ ​ options ​ price ​ term (years) ​ value ($) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (in Thousands) ​ Options outstanding at December 31, 2023 383,865 ​ $ 30.65 ​ ​ ​ ​ ​ ​ Plus: Options granted — ​ ​ — ​ ​ ​ ​ ​ ​ Less: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Options exercised (149,773) ​ ​ 25.08 ​ ​ ​ ​ ​ ​ Options expired — ​ ​ — ​ ​ ​ ​ ​ ​ Options forfeited (21,937) ​ ​ 23.93 ​ ​ ​ ​ ​ ​ Options outstanding at December 31, 2024 212,155 ​ 35.27 4.13 ​ $ 5,918 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Options fully vested and exercisable at December 31, 2024 121,714 ​ $ 35.92 3.31 ​ $ 3,316 ​
Schedule of other information pertaining to option activity	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Twelve Months Ended December 31, ​ ​ 2024 ​ 2023 ​ 2022 Weighted average grant date fair value of stock options granted $ — $ — $ 11.24 ​ Total fair value of stock options vested ​ $ 616,286 ​ $ 514,000 ​ $ 514,000 ​ Total intrinsic value of stock options exercised ​ $ 4,640,000 ​ $ 1,060,000 ​ $ 1,670,000 ​
Summary of activity under the SAR Plan	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ ​ ​ ​ ​ Weighted ​ average ​ ​ ​ ​ ​ Number of ​ average ​ remaining ​ Aggregate ​ ​ stock appreciation ​ exercise ​ contractual ​ intrinsic ​ ​ rights ​ price ​ term (years) ​ value ($) ​ ​ ​ ​ ​ ​ ​ ​ ​ (in Thousands) SARs outstanding at December 31, 2023 465,250 ​ $ 39.35 ​ ​ ​ ​ ​ Plus: SARs granted 8,000 ​ ​ 53.91 ​ ​ ​ ​ ​ Less: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ SARs exercised (2,548) ​ ​ 39.33 ​ ​ ​ ​ ​ SARs expired — ​ ​ — ​ ​ ​ ​ ​ SARs forfeited (14,000) ​ ​ 39.33 ​ ​ ​ ​ ​ SARs outstanding at December 31, 2024 456,702 ​ 39.61 7.54 ​ $ 10,757 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ SARs fully vested and exercisable at December 31, 2024 22,435 ​ $ 39.35 7.50 ​ $ 534

Financial Instruments with Of_2

Financial Instruments with Off-Statement of Condition Risk and Concentrations of Credit Risk (Tables)	12 Months Ended
	Dec. 31, 2024
Financial Instruments with Off-Statement of Condition Risk and Concentrations of Credit Risk
Schedule of financial amounts of instruments, whose contract amounts represent credit risks	​ ​ ​ ​ ​ Commitments to extend credit $ 3,440,252 Credit card lines ​ $ 12,985 Standby letters of credit ​ $ 147,435 Commercial letters of credit ​ $ 2,108

Capital Requirements (Tables)

Capital Requirements (Tables)	12 Months Ended
	Dec. 31, 2024
Capital Requirements
Schedule of the Company's and the bank subsidiaries' actual capital amounts and ratios	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For Capital Adequacy ​ To Be Well-Capitalized ​ ​ ​ ​ ​ ​ ​ Purposes ​ Under Prompt Corrective ​ ​ Actual ​ Phase In Schedule ​ Action Provisions ​ ​ Amount ​ Ratio ​ Amount ​ Ratio ​ Amount ​ Ratio ​ ​ ​ ​ ​ ​ ​ (greater than ​ (greater than ​ (greater than ​ (greater than ​ ​ ​ ​ ​ ​ ​ or equal to) ​ or equal to) ​ or equal to) ​ or equal to) ​ ​ (Dollars in Thousands) As of December 31, 2024: ​ ​ ​ ​ Common Equity Tier 1 (to Risk Weighted Assets): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ $ 2,893,228 ​ 22.42 % $ 903,203 7.000 % ​ N/A N/A ​ International Bank of Commerce, Laredo ​ 1,638,720 ​ 19.46 ​ 589,359 7.000 ​ $ 547,262 6.50 % International Bank of Commerce, Brownsville ​ ​ 554,879 ​ 26.11 ​ ​ 148,761 ​ 7.000 ​ ​ 138,136 ​ 6.50 ​ International Bank of Commerce, Oklahoma ​ 240,023 ​ 20.57 ​ 81,679 7.000 ​ 75,845 6.50 ​ Commerce Bank ​ 102,200 ​ 37.50 ​ 19,077 7.000 ​ 17,714 6.50 ​ International Bank of Commerce, Zapata ​ 66,932 ​ 32.74 ​ 14,310 7.000 ​ ​ 13,287 6.50 ​ Total Capital (to Risk Weighted Assets): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ $ 3,136,215 ​ 24.31 % $ 1,354,805 10.500 % ​ N/A N/A ​ International Bank of Commerce, Laredo ​ 1,744,057 ​ 20.71 ​ 884,039 10.500 ​ $ 841,942 10.00 % International Bank of Commerce, Brownsville ​ ​ 578,515 ​ 27.22 ​ ​ 223,142 ​ 10.500 ​ ​ 212,516 ​ 10.00 ​ International Bank of Commerce, Oklahoma ​ 254,659 ​ 21.82 ​ 122,519 10.500 ​ 116,685 10.00 ​ Commerce Bank ​ 105,090 ​ 38.56 ​ 28,616 10.500 ​ 27,253 10.00 ​ International Bank of Commerce, Zapata ​ 69,278 ​ 33.89 ​ 21,464 10.500 ​ 20,442 10.00 ​ Tier 1 Capital (to Risk Weighted Assets): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ $ 2,974,881 ​ 23.06 % $ 1,096,747 8.500 % N/A N/A ​ International Bank of Commerce, Laredo ​ 1,638,720 ​ 19.46 ​ 715,651 8.500 ​ $ 673,554 8.00 % International Bank of Commerce, Brownsville ​ ​ 554,879 ​ 26.11 ​ ​ 180,639 ​ 8.500 ​ ​ 170,013 ​ 8.00 ​ International Bank of Commerce, Oklahoma ​ 240,023 ​ 20.57 ​ 99,182 8.500 ​ 93,348 8.00 ​ Commerce Bank ​ 102,200 ​ 37.50 ​ 23,165 8.500 ​ 21,802 8.00 ​ International Bank of Commerce, Zapata ​ 66,932 ​ 32.74 ​ 17,376 8.500 ​ 16,354 8.00 ​ Tier 1 Capital (to Average Assets): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ $ 2,974,881 ​ 18.84 % $ 631,755 4.00 % $ N/A N/A ​ International Bank of Commerce, Laredo ​ 1,638,720 ​ 17.67 ​ 370,911 4.00 ​ 463,639 5.00 % International Bank of Commerce, Brownsville ​ ​ 554,879 ​ 13.08 ​ ​ 169,680 ​ 4.00 ​ ​ 212,100 ​ 5.00 ​ International Bank of Commerce, Oklahoma ​ 240,023 ​ 14.47 ​ 66,341 4.00 ​ 82,926 5.00 ​ Commerce Bank ​ 102,200 ​ 13.53 ​ 30,219 4.00 ​ 37,774 5.00 ​ International Bank of Commerce, Zapata ​ 66,932 ​ 13.44 ​ 19,917 4.00 ​ 24,896 5.00 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ To Be Well-Capitalized ​ ​ ​ ​ ​ ​ ​ For Capital Adequacy ​ ​ Under Prompt Corrective ​ ​ Actual ​ Purposes ​ ​ Action Provisions ​ ​ Amount ​ Ratio ​ Amount ​ Ratio ​ ​ Amount Ratio ​ ​ ​ ​ ​ ​ ​ (greater than ​ (greater than ​ (greater than ​ (greater than ​ ​ ​ ​ ​ ​ ​ or equal to) ​ or equal to) ​ or equal to) ​ or equal to) ​ ​ (Dollars in Thousands) As of December 31, 2023: ​ ​ ​ ​ Common Equity Tier 1 (to Risk Weighted Assets): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ $ 2,563,130 ​ 21.72 % $ 825,968 7.000 % ​ N/A N/A ​ International Bank of Commerce, Laredo ​ 1,444,775 ​ 18.54 ​ 545,611 7.000 ​ $ 506,639 6.50 % International Bank of Commerce, Oklahoma ​ ​ 477,390 ​ 24.41 ​ ​ 136,883 ​ 7.000 ​ ​ 127,106 ​ 6.50 ​ International Bank of Commerce, Brownsville ​ 232,965 ​ 20.72 ​ 78,718 7.000 ​ 73,095 6.50 ​ International Bank of Commerce, Zapata ​ 97,334 ​ 36.57 ​ 18,628 7.000 ​ 17,298 6.50 ​ Commerce Bank ​ 64,110 ​ 31.18 ​ 14,394 7.000 ​ 13,366 6.50 ​ Total Capital (to Risk Weighted Assets): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ $ 2,790,171 ​ 23.65 % $ 1,238,952 10.500 % ​ N/A N/A % International Bank of Commerce, Laredo ​ 1,542,462 ​ 19.79 ​ 818,416 10.500 ​ $ 779,444 10.00 ​ International Bank of Commerce, Oklahoma ​ ​ 500,268 ​ 25.58 ​ ​ 205,325 ​ 10.500 ​ ​ 195,547 ​ 10.00 ​ International Bank of Commerce, Brownsville ​ 247,031 ​ 21.97 ​ 118,076 10.500 ​ 112,454 10.00 ​ International Bank of Commerce, Zapata ​ 100,660 ​ 37.82 ​ 27,943 10.500 ​ 26,612 10.00 ​ Commerce Bank ​ 66,680 ​ 32.43 ​ 21,591 10.500 ​ 20,563 10.00 ​ Tier 1 Capital (to Risk Weighted Assets): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ % Consolidated ​ $ 2,642,492 ​ 22.39 % $ 1,002,961 8.500 % N/A N/A ​ International Bank of Commerce, Laredo ​ 1,444,775 ​ 18.54 ​ 662,527 8.500 ​ $ 623,555 8.00 ​ International Bank of Commerce, Oklahoma ​ ​ 477,390 ​ 24.41 ​ ​ 166,215 ​ 8.500 ​ ​ 156,438 ​ 8.00 ​ International Bank of Commerce, Brownsville ​ 232,965 ​ 20.72 ​ 95,586 8.500 ​ 89,963 8.00 ​ International Bank of Commerce, Zapata ​ 97,334 ​ 36.57 ​ 22,620 8.500 ​ 21,290 8.00 ​ Commerce Bank ​ 64,110 ​ 31.18 ​ 17,478 8.500 ​ 16,450 8.00 % Tier 1 Capital (to Average Assets): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ $ 2,642,492 ​ 17.46 % $ 605,262 4.00 % $ N/A N/A ​ International Bank of Commerce, Laredo ​ 1,444,775 ​ 16.40 ​ 352,412 4.00 ​ 440,515 5.00 ​ International Bank of Commerce, Oklahoma ​ ​ 477,390 ​ 11.79 ​ ​ 161,919 ​ 4.00 ​ ​ 202,398 ​ 5.00 ​ International Bank of Commerce, Brownsville ​ 232,965 ​ 14.72 ​ 63,294 4.00 ​ 79,117 5.00 ​ International Bank of Commerce, Zapata ​ 97,334 ​ 14.50 ​ 26,858 4.00 ​ 33,572 5.00 ​ Commerce Bank ​ 64,110 ​ 13.26 ​ 19,338 4.00 ​ 24,172 5.00 ​ ​

Fair Value (Tables)

Fair Value (Tables)	12 Months Ended
	Dec. 31, 2024
Fair Value
Assets and liabilities measured at fair value on a recurring basis	The following table represents financial instruments reported on the consolidated statements of condition at their fair value as of December 31, 2024 by level within the fair value measurement hierarchy. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurements at ​ ​ ​ ​ ​ ​ Reporting Date Using ​ ​ ​ ​ ​ ​ (in Thousands) ​ ​ ​ ​ ​ ​ Quoted ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Prices in ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Active ​ Significant ​ ​ ​ ​ ​ ​ Assets/Liabilities ​ Markets for ​ Other ​ Significant ​ ​ ​ Measured at ​ Identical ​ Observable ​ Unobservable ​ ​ ​ Fair Value ​ Assets ​ Inputs ​ Inputs ​ ​ ​ December 31, 2024 ​ (Level 1) ​ (Level 2) ​ (Level 3) ​ Measured on a recurring basis: ​ ​ ​ ​ ​ Assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Available for sale debt securities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential mortgage-backed securities ​ $ 4,835,176 ​ $ — ​ $ 4,835,176 ​ $ — ​ States and political subdivisions ​ 152,741 ​ — ​ 152,741 ​ — ​ Equity Securities ​ 5,394 ​ 5,394 ​ ​ — ​ — ​ ​ ​ $ 4,993,311 ​ $ 5,394 ​ $ 4,987,917 ​ $ — ​ ​ The following table represents financial instruments reported on the consolidated balance sheets at their fair value as of December 31, 2023 by level within the fair value measurement hierarchy. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurements at ​ ​ ​ ​ ​ ​ Reporting Date Using ​ ​ ​ ​ ​ ​ (in Thousands) ​ ​ ​ ​ ​ ​ Quoted ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Prices in ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Active ​ Significant ​ ​ ​ ​ ​ ​ Assets/Liabilities ​ Markets for ​ Other ​ Significant ​ ​ ​ Measured at ​ Identical ​ Observable ​ Unobservable ​ ​ ​ Fair Value ​ Assets ​ Inputs ​ Inputs ​ ​ ​ December 31, 2023 ​ (Level 1) ​ (Level 2) ​ (Level 3) ​ Measured on a recurring basis: ​ ​ ​ ​ ​ Assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Available for sale securities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential mortgage-backed securities ​ $ 4,660,099 ​ $ — ​ $ 4,660,099 ​ $ — ​ States and political subdivisions ​ 162,242 ​ — ​ 162,242 ​ — ​ Equity Securities ​ 5,417 ​ 5,417 ​ — ​ — ​ ​ ​ $ 4,827,758 ​ $ 5,417 ​ $ 4,822,341 ​ $ — ​
Assets measured at fair value on a non-recurring basis	The following table represents financial instruments measured at fair value on a non-recurring basis as of and for the period ended December 31, 2024 by level within the fair value measurement hierarchy: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurements at Reporting ​ ​ ​ ​ ​ ​ ​ ​ Date Using ​ ​ ​ ​ ​ ​ ​ ​ (in thousands) ​ ​ ​ ​ ​ ​ ​ ​ Quoted ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Assets/Liabilities ​ Prices in ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Measured at ​ Active ​ Significant ​ ​ ​ ​ ​ ​ ​ ​ Fair Value ​ Markets for ​ Other ​ Significant ​ Net ​ ​ Period ended ​ Identical ​ Observable ​ Unobservable ​ Provision ​ ​ December 31, ​ Assets ​ Inputs ​ Inputs ​ During ​ ​ 2024 ​ (Level 1) ​ (Level 2) ​ (Level 3) ​ Period Measured on a non-recurring basis: ​ ​ ​ ​ ​ Assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Watch List—Doubtful loans ​ $ 169,246 ​ $ — ​ $ — ​ $ 169,246 ​ $ 14,662 Other real estate owned ​ ​ 11,537 ​ ​ — ​ ​ — ​ ​ 11,537 ​ ​ 632 ​ The following table represents financial instruments measured at fair value on a non-recurring basis as of and for the year ended December 31, 2023 by level within the fair value measurement hierarchy: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurements at Reporting ​ ​ ​ ​ ​ ​ ​ ​ Date Using ​ ​ ​ ​ ​ ​ ​ ​ (in thousands) ​ ​ ​ ​ ​ ​ ​ ​ Quoted ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Assets/Liabilities ​ Prices in ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Measured at ​ Active ​ Significant ​ ​ ​ ​ ​ ​ ​ ​ Fair Value ​ Markets ​ Other ​ Significant ​ Net ​ ​ Year ended ​ for Identical ​ Observable ​ Unobservable ​ Provision ​ ​ December 31, ​ Assets ​ Inputs ​ Inputs ​ During ​ ​ 2023 ​ (Level 1) ​ (Level 2) ​ (Level 3) ​ Period Measured on a non-recurring basis: ​ ​ ​ ​ ​ Assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Watch List—Doubtful loans ​ $ 46,124 ​ $ — ​ $ — ​ $ 46,124 ​ $ 10,221 Other real estate owned ​ 307 ​ — ​ — ​ 307 ​ 2,538

International Bancshares Corp_4

International Bancshares Corporation (Parent Company Only) Financial Information Statements of Condition (Tables)	12 Months Ended
	Dec. 31, 2024
International Bancshares Corporation (Parent Company Only) Financial Information Statements of Condition
Schedule of condensed statements of condition of Parent Company	(Dollars in Thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2024 2023 ASSETS ​ ​ ​ ​ ​ ​ ​ Cash ​ $ 65,858 ​ $ 105,184 ​ Other investments ​ 155,416 ​ 111,382 ​ Net loans ​ 60,502 ​ 62,150 ​ Investment in subsidiaries ​ 2,622,447 ​ 2,281,952 ​ Goodwill ​ ​ 3,365 ​ ​ 3,365 ​ Other assets ​ 12,744 ​ 8,617 ​ Total assets ​ $ 2,920,332 ​ $ 2,572,650 ​ LIABILITIES AND SHAREHOLDERS’ EQUITY ​ ​ ​ ​ ​ ​ ​ Liabilities: ​ ​ ​ ​ ​ ​ ​ Junior subordinated deferrable interest debentures ​ $ 108,868 ​ $ 108,868 ​ Due to IBC Trading ​ 21 ​ 21 ​ Other liabilities ​ 14,736 ​ 15,987 ​ Total liabilities ​ 123,625 ​ 124,876 ​ Shareholders’ equity: ​ ​ ​ ​ ​ ​ ​ Common shares ​ 96,617 ​ 96,467 ​ Surplus ​ 159,333 ​ 155,511 ​ Retained earnings ​ 3,356,177 ​ 3,029,088 ​ Accumulated other comprehensive loss ​ (379,054) ​ (397,889) ​ ​ ​ 3,233,073 ​ 2,883,177 ​ Less cost of shares in treasury ​ (436,366) ​ (435,403) ​ Total shareholders’ equity ​ 2,796,707 ​ 2,447,774 ​ Total liabilities and shareholders’ equity ​ $ 2,920,332 ​ $ 2,572,650 ​ ​

International Bancshares Corp_5

International Bancshares Corporation (Parent Company Only) Financial Information Statements of Income (Tables)	12 Months Ended
	Dec. 31, 2024
International Bancshares Corporation (Parent Company Only) Financial Information Statements of Income
Schedule of condensed statements of income of Parent Company	(Dollars in Thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2024 2023 2022 Income: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Dividends from subsidiaries ​ $ 130,000 ​ $ 179,000 ​ $ 222,175 ​ Interest income on notes receivable ​ 7,602 ​ 5,769 ​ 2,394 ​ (Loss) income on other investments ​ (3,356) ​ (6,150) ​ 8,662 ​ Other ​ 1,059 ​ 4 ​ 857 ​ Total income ​ 135,305 ​ 178,623 ​ 234,088 ​ Expenses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest expense (Debentures) ​ 7,762 ​ 8,122 ​ 5,037 ​ Provision for credit loss ​ ​ 625 ​ ​ 500 ​ ​ 437 ​ Other ​ 6,252 ​ 252 ​ 2,291 ​ Total expenses ​ 14,639 ​ 8,874 ​ 7,765 ​ Income before federal income taxes and equity in undistributed net income of subsidiaries ​ 120,666 ​ 169,749 ​ 226,323 ​ Income tax (benefit) expense ​ (833) ​ (1,365) ​ 504 ​ Income before equity in undistributed net income of subsidiaries ​ 121,499 ​ 171,114 ​ 225,819 ​ Equity in undistributed net income of subsidiaries ​ 287,668 ​ 240,654 ​ 74,413 ​ Net income ​ $ 409,167 ​ $ 411,768 ​ $ 300,232 ​ ​

International Bancshares Corp_6

International Bancshares Corporation (Parent Company Only) Financial Information Statements of Cash Flows (Tables)	12 Months Ended
	Dec. 31, 2024
International Bancshares Corporation (Parent Company Only) Financial Information Statements of Cash Flows
Schedule of condensed statements of cash flows of Parent Company	(Dollars in Thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2024 2023 2022 Operating activities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net income ​ $ 409,167 ​ $ 411,768 ​ $ 300,232 ​ Adjustments to reconcile net income to net cash provided by operating activities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Provision for credit loss ​ ​ 625 ​ ​ 500 ​ ​ 437 ​ Unrealized (gain) loss on equity securities with readily determinable fair values ​ ​ (27) ​ ​ (14) ​ ​ 36 ​ Stock compensation expense ​ 214 ​ 330 ​ 449 ​ (Decrease) increase in other liabilities ​ (1,251) ​ 4,911 ​ 1,743 ​ Equity in undistributed net income of subsidiaries ​ (287,668) ​ (240,654) ​ (74,413) ​ Net cash provided by operating activities ​ 121,060 ​ 176,841 ​ 228,484 ​ Investing activities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net increase in loans ​ (24,528) ​ (20,170) ​ (32,556) ​ Increase in other assets and other investments ​ (56,575) ​ (33,285) ​ (43,343) ​ Net cash used in investing activities ​ (81,103) ​ (53,455) ​ (75,899) ​ Financing activities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Redemption of long-term debt ​ — ​ (25,774) ​ — ​ Proceeds from stock transactions ​ 3,758 ​ 1,167 ​ 1,537 ​ Payments of cash dividends - common ​ (82,078) ​ (78,247) ​ (75,375) ​ Purchase of treasury stock ​ (963) ​ (4,611) ​ (52,048) ​ Net cash used in financing activities ​ (79,283) ​ (107,465) ​ (125,886) ​ (Decrease) increase in cash ​ (39,326) ​ 15,921 ​ 26,699 ​ Cash at beginning of year ​ 105,184 ​ 89,263 ​ 62,564 ​ Cash at end of year ​ $ 65,858 ​ $ 105,184 ​ $ 89,263 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Non-cash investing activities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net transfers from loans to other investments ​ $ 25,551 ​ $ — ​ $ — ​ ​

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Details)		12 Months Ended
	Oct. 01, 2024 USD ($)	Dec. 31, 2024 USD ($) item subsidiary segment	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Summary of Significant Accounting Policies
Number of insurance-related subsidiaries | item		1
Investment Securities
Number of components in which other-than-temporary impairment is segregated | item		2
Non-Accrual Loans
Period of charge off for past due unsecured consumer loans		90 days
Minimum period that past due unsecured loans outstanding may not be placed on nonaccrual status under special circumstances		90 days
Maximum period of non-consumer loans outstanding that is used to evaluate whether loans should be placed on non-accrual status		90 days
Other Real Estate Owned and Repossessed Assets
Other real estate owned		$ 28,193,000	$ 26,728,000
Repossessed assets		$ 358,000	236,000
Other Investments
Equity Method Investments, Recording Arrear		3 months
Income Taxes
Percentage of likelihood of realization of recognized tax benefit		50%
Liability for unrecognized tax benefits		$ 0	0
Interest expense related to uncertain tax positions		0	0	$ 0
Penalties related to uncertain tax positions		0	0	$ 0
Goodwill and Identified Intangible Assets
Changes in carrying amount of goodwill		$ 0	$ 0
Goodwill impairment loss	$ 0
Segments of an Enterprise and Related Information
Number of operating segments | segment		1
Number of active operating bank subsidiaries | subsidiary		5

Investment Securities, Equity_3

Investment Securities, Equity Securities with Readily Determinable Fair Values and Other Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Held-to-maturity securities
Amortized Value	$ 4,400	$ 3,400
Estimated fair value	4,400	3,400
Carrying Value	4,400	3,400
Available-for-sale securities
Amortized cost	5,472,310	5,330,814
Gross unrealized gains	9,189	11,143
Gross unrealized losses	(493,583)	(519,616)
Estimated fair value, Available for sale securities	4,987,916	4,822,341
Estimated Fair Value
Available-for-sale securities
Estimated fair value, Available for sale securities	4,987,916	4,822,341
Reported Value Measurement
Available-for-sale securities
Estimated fair value, Available for sale securities	4,987,916	4,822,341
Residential mortgage-backed securities
Available-for-sale securities
Amortized cost	5,315,488	5,169,813
Gross unrealized gains	8,858	9,541
Gross unrealized losses	(489,170)	(519,255)
Residential mortgage-backed securities | Estimated Fair Value
Available-for-sale securities
Estimated fair value, Available for sale securities	4,835,176	4,660,099
Residential mortgage-backed securities | Reported Value Measurement
Available-for-sale securities
Estimated fair value, Available for sale securities	4,835,176	4,660,099
Mortgage-backed securities
Available-for-sale securities
Estimated fair value, Available for sale securities	1,001,184	959,421
Fannie Mae and Freddie Mac
Available-for-sale securities
Estimated fair value, Available for sale securities	3,833,992	3,700,678
States and political subdivisions
Available-for-sale securities
Amortized cost	156,822	161,001
Gross unrealized gains	331	1,602
Gross unrealized losses	(4,413)	(361)
States and political subdivisions | Estimated Fair Value
Available-for-sale securities
Estimated fair value, Available for sale securities	152,740	162,242
States and political subdivisions | Reported Value Measurement
Available-for-sale securities
Estimated fair value, Available for sale securities	152,740	162,242
Other Debt Obligations
Held-to-maturity securities
Amortized Value	4,400	3,400
Estimated fair value	4,400	3,400
Carrying Value	$ 4,400	$ 3,400

Investment Securities, Equity_4

Investment Securities, Equity Securities with Readily Determinable Fair Values and Other Investments - Contractual Maturities and Estimated Fair Values (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Amortized Cost
Due in one year or less, held-to-maturity debt securities amortized cost	$ 1,325,000
Due after one year through five years, held-to-maturity debt securities amortized cost	3,075,000
Amortized cost, held-to-maturity debt securities	4,400,000	$ 3,400,000
Fair Value
Due in one year or less, held-to-maturity debt securities, Estimated fair value	1,325,000
Due after one year through five years, held-to-maturity debt securities, Estimated fair value	3,075,000
Estimated fair value	4,400,000	3,400,000
Available-for-sale debt securities amortized cost disclosures
Due after five years through ten years, available-for-sale debt securities amortized cost	1,442,000
Due after ten years, available-for-sale debt securities amortized cost	155,380,000
Residential mortgage-backed securities, available-for-sale debt securities amortized cost	5,315,488,000
Amortized cost, Available-for-sale securities	5,472,310,000	5,330,814,000
Available for sale debt securities, Estimated Fair Value Disclosures
Due after five years through ten years, available-for-sale debt securities, Estimated Fair Value	1,438,000
Due after ten years, available-for-sale debt securities, Estimated Fair Value	151,302,000
Residential mortgage-backed securities, available-for-sale debt securities, Estimated Fair Value	4,835,176,000
Estimated fair value, Available for sale securities	4,987,916,000	4,822,341,000
Available for sale debt securities, Estimated Fair Value Disclosures
Proceeds from sales and calls of available for sale securities	3,750,000	2,045,000	$ 800,000
Proceeds from sales of mortgage-backed securities	0	0	0
Gross gains realized on sales	0	0	0
Gross losses realized on sales	1,000	$ 3,000	$ 0
Collateral pledged
Available-for-sale debt securities amortized cost disclosures
Amortized cost, Available-for-sale securities	1,896,183,000
Available for sale debt securities, Estimated Fair Value Disclosures
Fair value of available for sale investment securities pledged	$ 1,646,971,000

Investment Securities, Equity_5

Investment Securities, Equity Securities with Readily Determinable Fair Values and Other Investments - Unrealized Losses (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Available for sale:
Fair value, less than 12 months	$ 610,825	$ 578,099
Unrealized losses, less than 12 Months	(6,515)	(8,268)
Fair value, 12 months or more	3,416,137	3,520,722
Unrealized losses, 12 Months or More	(487,068)	(511,348)
Fair value, Total	4,026,962	4,098,821
Unrealized losses, Total	(493,583)	(519,616)
Residential mortgage-backed securities
Available for sale:
Fair value, less than 12 months	544,375	577,448
Unrealized losses, less than 12 Months	(4,126)	(8,267)
Fair value, 12 months or more	3,358,586	3,456,349
Unrealized losses, 12 Months or More	(485,044)	(510,988)
Fair value, Total	3,902,961	4,033,797
Unrealized losses, Total	(489,170)	(519,255)
Obligations of states and political subdivisions
Available for sale:
Fair value, less than 12 months	66,450	651
Unrealized losses, less than 12 Months	(2,389)	(1)
Fair value, 12 months or more	57,551	64,373
Unrealized losses, 12 Months or More	(2,024)	(360)
Fair value, Total	124,001	65,024
Unrealized losses, Total	$ (4,413)	$ (361)

Investment Securities, Equity_6

Investment Securities, Equity Securities with Readily Determinable Fair Values and Other Investments - Unrealized and realized gains and losses recognized in net income on equity securities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Investment Securities, Equity Securities with Readily Determinable Fair Values and Other Investments
Equity Securities	$ 5,394	$ 5,417
Summary of unrealized and realized gains and losses recognized in net income on equity securities
Net gains (losses) recognized during the period on equity securities	(24)	59	$ (721)
Unrealized gains (losses) recognized during the reporting period on equity securities still held at the reporting date	$ (24)	$ 59	$ (721)

Investment Securities, Equity_7

Investment Securities, Equity Securities with Readily Determinable Fair Values and Other Investments - Other Investments (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
LIHTC
Investments	$ 186,369,000	$ 200,245,000
Investment, Proportional Amortization Method, Elected, Statement of Financial Position [Extensible Enumeration]	Other Long-Term Investments	Other Long-Term Investments
Estimated tax credits	$ 28,310,000
Estimated amortization	$ 26,615,000
Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Cash Flows [Extensible Enumeration]	Net Income (Loss), Including Portion Attributable to Noncontrolling Interest
Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Noninterest Expense
Impairment losses	$ 0
Other liabilities
LIHTC
Unfunded commitments	$ 25,064,000	$ 34,126,000

Loans (Details)

Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Summary of loans, by loan type
Total loans	$ 8,809,826	$ 8,058,961
Commercial, financial and agricultural
Summary of loans, by loan type
Total loans	5,089,721	4,802,622
Real estate - mortgage
Summary of loans, by loan type
Total loans	999,313	938,901
Commercial real estate
Summary of loans, by loan type
Total loans	2,484,454	2,091,622
Consumer
Summary of loans, by loan type
Total loans	49,777	45,121
Foreign
Summary of loans, by loan type
Total loans	$ 186,561	$ 180,695

Allowance for Credit Losses - C

Allowance for Credit Losses - Commercial real estate loan portfolio (Details) - Commercial real estate - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Loan loss allowances, real estate securing credit
Amount of real estate securing the credit	$ 5,722,372	$ 5,290,280
Percent of total of real estate securing the credit	100%	100%
Commercial real estate construction development
Loan loss allowances, real estate securing credit
Amount of real estate securing the credit	$ 1,313,984	$ 1,035,936
Percent of total of real estate securing the credit	23%	19.60%
Hotel
Loan loss allowances, real estate securing credit
Amount of real estate securing the credit	$ 1,080,706	$ 1,116,539
Percent of total of real estate securing the credit	18.90%	21.10%
Retail multi-tenant
Loan loss allowances, real estate securing credit
Amount of real estate securing the credit	$ 738,874	$ 699,145
Percent of total of real estate securing the credit	12.90%	13.20%
Lot development: residential and commercial lots
Loan loss allowances, real estate securing credit
Amount of real estate securing the credit	$ 513,760	$ 548,797
Percent of total of real estate securing the credit	9%	10.40%
Warehouse
Loan loss allowances, real estate securing credit
Amount of real estate securing the credit	$ 435,783	$ 355,635
Percent of total of real estate securing the credit	7.60%	6.70%
Office/Professional buildings
Loan loss allowances, real estate securing credit
Amount of real estate securing the credit	$ 416,014	$ 311,413
Percent of total of real estate securing the credit	7.30%	5.90%
1 - 4 family construction
Loan loss allowances, real estate securing credit
Amount of real estate securing the credit	$ 338,832	$ 329,828
Percent of total of real estate securing the credit	5.90%	6.20%
Multi-family
Loan loss allowances, real estate securing credit
Amount of real estate securing the credit	$ 310,115	$ 380,839
Percent of total of real estate securing the credit	5.40%	7.20%
Owner occupied real estate
Loan loss allowances, real estate securing credit
Amount of real estate securing the credit	$ 270,584	$ 246,797
Percent of total of real estate securing the credit	4.70%	4.70%
Commercial leased properties
Loan loss allowances, real estate securing credit
Amount of real estate securing the credit	$ 194,023	$ 167,539
Percent of total of real estate securing the credit	3.40%	3.20%
Farmland
Loan loss allowances, real estate securing credit
Amount of real estate securing the credit	$ 109,697	$ 97,812
Percent of total of real estate securing the credit	1.90%	1.80%

Allowance for Credit Losses - B

Allowance for Credit Losses - By Loan Class (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Balance at the beginning of the period	$ 157,069	$ 125,972	$ 110,374
Losses charged to allowance	(36,608)	(10,184)	(9,479)
Recoveries credited to allowance	4,274	6,705	3,426
Net losses charged to allowance	(32,334)	(3,479)	(6,053)
Provision (credit) charged to operations	31,802	34,576	21,651
Balance at the end of the period	156,537	157,069	125,972
Commercial, financial and agricultural | Commercial
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Charge-down due to customer filing bankruptcy	25,600
Commercial, financial and agricultural | Domestic | Commercial
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Balance at the beginning of the period	35,550	26,728	23,178
Losses charged to allowance	(34,149)	(9,664)	(9,050)
Recoveries credited to allowance	4,079	5,433	2,894
Net losses charged to allowance	(30,070)	(4,231)	(6,156)
Provision (credit) charged to operations	24,373	13,053	9,706
Balance at the end of the period	29,853	35,550	26,728
Commercial real estate | Domestic | Commercial real estate construction development
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Balance at the beginning of the period	55,291	44,684	35,390
Losses charged to allowance	(2,228)		(2)
Recoveries credited to allowance		837	123
Net losses charged to allowance	(2,228)	837	121
Provision (credit) charged to operations	7,576	9,770	9,173
Balance at the end of the period	60,639	55,291	44,684
Commercial real estate | Domestic | Commercial real estate: farmland & commercial
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Balance at the beginning of the period	42,703	36,474	35,654
Losses charged to allowance			(16)
Recoveries credited to allowance	20	143	27
Net losses charged to allowance	20	143	11
Provision (credit) charged to operations	1,267	6,086	809
Balance at the end of the period	43,990	42,703	36,474
Commercial real estate | Domestic | Commercial Real Estate Multifamily Receivable [Member]
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Balance at the beginning of the period	5,088	3,794	3,291
Provision (credit) charged to operations	(219)	1,294	503
Balance at the end of the period	4,869	5,088	3,794
Real estate - mortgage | Domestic | Residential First Lien
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Balance at the beginning of the period	5,812	4,759	4,073
Losses charged to allowance	(46)	(43)	(160)
Recoveries credited to allowance	38	16	240
Net losses charged to allowance	(8)	(27)	80
Provision (credit) charged to operations	(276)	1,080	606
Balance at the end of the period	5,528	5,812	4,759
Real estate - mortgage | Domestic | Residential Junior Lien
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Balance at the beginning of the period	11,024	8,284	7,754
Losses charged to allowance		(298)	(28)
Recoveries credited to allowance	123	260	104
Net losses charged to allowance	123	(38)	76
Provision (credit) charged to operations	(1,116)	2,778	454
Balance at the end of the period	10,031	11,024	8,284
Consumer | Domestic
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Balance at the beginning of the period	318	281	272
Losses charged to allowance	(185)	(179)	(223)
Recoveries credited to allowance	13	16	38
Net losses charged to allowance	(172)	(163)	(185)
Provision (credit) charged to operations	135	200	194
Balance at the end of the period	281	318	281
Foreign | Foreign
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Balance at the beginning of the period	1,283	968	762
Recoveries credited to allowance	1
Net losses charged to allowance	1
Provision (credit) charged to operations	62	315	206
Balance at the end of the period	$ 1,346	$ 1,283	$ 968

Allowance for Credit Losses - I

Allowance for Credit Losses - Impairment By Loan Class (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Loan loss allowances
Loans Individually Evaluated for Impairment, Recorded Investment	$ 169,188	$ 47,061
Loans Individually Evaluated for Impairment, Allowance	18,632	12,291
Loans Collectively Evaluated for Impairment, Recorded Investment	8,640,638	8,011,900
Loans Collectively Evaluated for Impairment, Allowance	137,905	144,778
Commercial, financial and agricultural | Domestic | Commercial
Loan loss allowances
Loans Individually Evaluated for Impairment, Recorded Investment	52,110	30,872
Loans Individually Evaluated for Impairment, Allowance	400	7,971
Loans Collectively Evaluated for Impairment, Recorded Investment	1,799,693	1,597,358
Loans Collectively Evaluated for Impairment, Allowance	29,453	27,579
Commercial real estate | Domestic | Commercial real estate construction development
Loan loss allowances
Loans Individually Evaluated for Impairment, Recorded Investment	8,195	15,701
Loans Individually Evaluated for Impairment, Allowance	8,122	4,320
Loans Collectively Evaluated for Impairment, Recorded Investment	2,476,259	2,075,921
Loans Collectively Evaluated for Impairment, Allowance	52,517	50,971
Commercial real estate | Domestic | Commercial real estate: farmland & commercial
Loan loss allowances
Loans Individually Evaluated for Impairment, Recorded Investment	65,733	299
Loans Individually Evaluated for Impairment, Allowance	8,228
Loans Collectively Evaluated for Impairment, Recorded Investment	2,862,070	2,793,254
Loans Collectively Evaluated for Impairment, Allowance	35,762	42,703
Commercial real estate | Domestic | Commercial real estate: multifamily
Loan loss allowances
Loans Individually Evaluated for Impairment, Recorded Investment	42,964	96
Loans Individually Evaluated for Impairment, Allowance	1,882
Loans Collectively Evaluated for Impairment, Recorded Investment	267,151	380,743
Loans Collectively Evaluated for Impairment, Allowance	2,987	5,088
Real estate - mortgage | Domestic | Residential First Lien
Loan loss allowances
Loans Individually Evaluated for Impairment, Recorded Investment	45	93
Loans Collectively Evaluated for Impairment, Recorded Investment	530,039	477,940
Loans Collectively Evaluated for Impairment, Allowance	5,528	5,812
Real estate - mortgage | Domestic | Residential Junior Lien
Loan loss allowances
Loans Individually Evaluated for Impairment, Recorded Investment	141
Loans Collectively Evaluated for Impairment, Recorded Investment	469,088	460,868
Loans Collectively Evaluated for Impairment, Allowance	10,031	11,024
Consumer | Domestic
Loan loss allowances
Loans Collectively Evaluated for Impairment, Recorded Investment	49,777	45,121
Loans Collectively Evaluated for Impairment, Allowance	281	318
Foreign | Foreign
Loan loss allowances
Loans Collectively Evaluated for Impairment, Recorded Investment	186,561	180,695
Loans Collectively Evaluated for Impairment, Allowance	$ 1,346	$ 1,283

Allowance for Credit Losses - N

Allowance for Credit Losses - Non-accrual Basis By Loan Class (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Loan loss allowances, financing receivable past due
Non-accrual loans, total	$ 169,136,000	$ 47,170,000	$ 51,648,000
Non-accrual loans with no credit allowance	76,313,000	6,001,000
Reduced interest income on non-accrual loans	12,661,000	6,614,000	$ 116,000
Commercial, financial and agricultural | Domestic | Commercial
Loan loss allowances, financing receivable past due
Non-accrual loans, total	52,110,000	30,872,000
Non-accrual loans with no credit allowance	51,276,000	122,000
Commercial real estate | Domestic | Commercial real estate construction development
Loan loss allowances, financing receivable past due
Non-accrual loans, total	8,195,000	15,701,000
Non-accrual loans with no credit allowance	73,000	5,400,000
Commercial real estate | Domestic | Commercial real estate: farmland & commercial
Loan loss allowances, financing receivable past due
Non-accrual loans, total	65,733,000	299,000
Non-accrual loans with no credit allowance	24,757,000	211,000
Commercial real estate | Domestic | Commercial real estate: multifamily
Loan loss allowances, financing receivable past due
Non-accrual loans, total	42,964,000	96,000
Non-accrual loans with no credit allowance	73,000	96,000
Real estate - mortgage | Domestic | Residential First Lien
Loan loss allowances, financing receivable past due
Non-accrual loans, total	134,000	202,000
Non-accrual loans with no credit allowance	$ 134,000	$ 172,000

Allowance for Credit Losses -_2

Allowance for Credit Losses - Impaired Loans (Details)	Dec. 31, 2024
Allowance for Credit Losses
Period of charge off for past due unsecured commercial loans	90 days

Allowance for Credit Losses - A

Allowance for Credit Losses - Aging By Loan Class (Details)	Dec. 31, 2024 USD ($) loan	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Financing receivable recorded investment
Past due 90 days or Greater and Still Accruing	$ 6,693,000	$ 5,597,000	$ 6,132,000
Loans	8,809,826,000	8,058,961,000
Current
Financing receivable recorded investment
Loans	8,670,880,000	7,995,156,000
Total Past Due
Financing receivable recorded investment
Loans	138,946,000	63,805,000
30 to 59 Days
Financing receivable recorded investment
Loans	16,012,000	12,872,000
60 to 89 Days
Financing receivable recorded investment
Loans	56,767,000	5,195,000
90 Days or Greater
Financing receivable recorded investment
Loans	$ 66,167,000	45,738,000
Commercial real estate: multifamily
Financing receivable recorded investment
Number of loans placed on non-accrual | loan	2
Commercial, financial and agricultural
Financing receivable recorded investment
Loans	$ 5,089,721,000	4,802,622,000
Commercial, financial and agricultural | Domestic | Commercial
Financing receivable recorded investment
Past due 90 days or Greater and Still Accruing	534,000	539,000
Loans	1,851,803,000	1,628,230,000
Commercial, financial and agricultural | Domestic | Commercial | Current
Financing receivable recorded investment
Loans	1,795,577,000	1,594,022,000
Commercial, financial and agricultural | Domestic | Commercial | Total Past Due
Financing receivable recorded investment
Loans	56,226,000	34,208,000
Commercial, financial and agricultural | Domestic | Commercial | 30 to 59 Days
Financing receivable recorded investment
Loans	4,070,000	2,387,000
Commercial, financial and agricultural | Domestic | Commercial | 60 to 89 Days
Financing receivable recorded investment
Loans	$ 51,577,000	1,583,000
Number of loans placed on non-accrual | loan	2
Commercial, financial and agricultural | Domestic | Commercial | 90 Days or Greater
Financing receivable recorded investment
Loans	$ 579,000	30,238,000
Commercial real estate
Financing receivable recorded investment
Loans	2,484,454,000	2,091,622,000
Commercial real estate | Domestic | Commercial real estate construction development
Financing receivable recorded investment
Loans	2,484,454,000	2,091,622,000
Commercial real estate | Domestic | Commercial real estate construction development | Current
Financing receivable recorded investment
Loans	2,473,896,000	2,077,917,000
Commercial real estate | Domestic | Commercial real estate construction development | Total Past Due
Financing receivable recorded investment
Loans	10,558,000	13,705,000
Commercial real estate | Domestic | Commercial real estate construction development | 30 to 59 Days
Financing receivable recorded investment
Loans	2,421,000	3,460,000
Commercial real estate | Domestic | Commercial real estate construction development | 60 to 89 Days
Financing receivable recorded investment
Loans	15,000
Commercial real estate | Domestic | Commercial real estate construction development | 90 Days or Greater
Financing receivable recorded investment
Loans	8,122,000	10,245,000
Commercial real estate | Domestic | Commercial real estate: farmland & commercial
Financing receivable recorded investment
Past due 90 days or Greater and Still Accruing	262,000	4,000
Loans	2,927,803,000	2,793,553,000
Commercial real estate | Domestic | Commercial real estate: farmland & commercial | Current
Financing receivable recorded investment
Loans	2,900,166,000	2,791,665,000
Commercial real estate | Domestic | Commercial real estate: farmland & commercial | Total Past Due
Financing receivable recorded investment
Loans	27,637,000	1,888,000
Commercial real estate | Domestic | Commercial real estate: farmland & commercial | 30 to 59 Days
Financing receivable recorded investment
Loans	1,221,000	1,424,000
Commercial real estate | Domestic | Commercial real estate: farmland & commercial | 60 to 89 Days
Financing receivable recorded investment
Loans		371,000
Commercial real estate | Domestic | Commercial real estate: farmland & commercial | 90 Days or Greater
Financing receivable recorded investment
Loans	$ 26,416,000	93,000
Number of Loans Secured by Hotel | loan	1
Number Of Loans Secured By Commercial Building | loan	1
Number of loans placed on non-accrual | loan	2
Commercial real estate | Domestic | Commercial real estate: multifamily
Financing receivable recorded investment
Loans	$ 310,115,000	380,839,000
Commercial real estate | Domestic | Commercial real estate: multifamily | Current
Financing receivable recorded investment
Loans	284,781,000	380,140,000
Commercial real estate | Domestic | Commercial real estate: multifamily | Total Past Due
Financing receivable recorded investment
Loans	25,334,000	699,000
Commercial real estate | Domestic | Commercial real estate: multifamily | 30 to 59 Days
Financing receivable recorded investment
Loans		369,000
Commercial real estate | Domestic | Commercial real estate: multifamily | 60 to 89 Days
Financing receivable recorded investment
Loans	270,000	330,000
Commercial real estate | Domestic | Commercial real estate: multifamily | 90 Days or Greater
Financing receivable recorded investment
Loans	25,064,000
Real estate - mortgage
Financing receivable recorded investment
Loans	999,313,000	938,901,000
Real estate - mortgage | Domestic | Residential First Lien
Financing receivable recorded investment
Past due 90 days or Greater and Still Accruing	3,542,000	2,437,000
Loans	530,084,000	478,032,000
Real estate - mortgage | Domestic | Residential First Lien | Current
Financing receivable recorded investment
Loans	520,353,000	472,236,000
Real estate - mortgage | Domestic | Residential First Lien | Total Past Due
Financing receivable recorded investment
Loans	9,731,000	5,796,000
Real estate - mortgage | Domestic | Residential First Lien | 30 to 59 Days
Financing receivable recorded investment
Loans	4,763,000	1,812,000
Real estate - mortgage | Domestic | Residential First Lien | 60 to 89 Days
Financing receivable recorded investment
Loans	1,337,000	1,439,000
Real estate - mortgage | Domestic | Residential First Lien | 90 Days or Greater
Financing receivable recorded investment
Loans	3,631,000	2,545,000
Real estate - mortgage | Domestic | Residential Junior Lien
Financing receivable recorded investment
Past due 90 days or Greater and Still Accruing	2,000,000	1,701,000
Loans	469,229,000	460,869,000
Real estate - mortgage | Domestic | Residential Junior Lien | Current
Financing receivable recorded investment
Loans	463,086,000	457,282,000
Real estate - mortgage | Domestic | Residential Junior Lien | Total Past Due
Financing receivable recorded investment
Loans	6,143,000	3,587,000
Real estate - mortgage | Domestic | Residential Junior Lien | 30 to 59 Days
Financing receivable recorded investment
Loans	2,599,000	1,273,000
Real estate - mortgage | Domestic | Residential Junior Lien | 60 to 89 Days
Financing receivable recorded investment
Loans	1,544,000	613,000
Real estate - mortgage | Domestic | Residential Junior Lien | 90 Days or Greater
Financing receivable recorded investment
Loans	2,000,000	1,701,000
Consumer
Financing receivable recorded investment
Loans	49,777,000	45,121,000
Consumer | Domestic
Financing receivable recorded investment
Past due 90 days or Greater and Still Accruing	16,000	27,000
Loans	49,777,000	45,121,000
Consumer | Domestic | Current
Financing receivable recorded investment
Loans	49,607,000	44,820,000
Consumer | Domestic | Total Past Due
Financing receivable recorded investment
Loans	170,000	301,000
Consumer | Domestic | 30 to 59 Days
Financing receivable recorded investment
Loans	122,000	263,000
Consumer | Domestic | 60 to 89 Days
Financing receivable recorded investment
Loans	32,000	11,000
Consumer | Domestic | 90 Days or Greater
Financing receivable recorded investment
Loans	16,000	27,000
Foreign
Financing receivable recorded investment
Loans	186,561,000	180,695,000
Foreign | Foreign
Financing receivable recorded investment
Past due 90 days or Greater and Still Accruing	339,000	889,000
Loans	186,561,000	180,695,000
Foreign | Foreign | Current
Financing receivable recorded investment
Loans	183,414,000	177,074,000
Foreign | Foreign | Total Past Due
Financing receivable recorded investment
Loans	3,147,000	3,621,000
Foreign | Foreign | 30 to 59 Days
Financing receivable recorded investment
Loans	816,000	1,884,000
Foreign | Foreign | 60 to 89 Days
Financing receivable recorded investment
Loans	1,992,000	848,000
Foreign | Foreign | 90 Days or Greater
Financing receivable recorded investment
Loans	$ 339,000	$ 889,000

Allowance for Credit Losses - P

Allowance for Credit Losses - Portfolio Credit Quality (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Loan portfolio by credit quality indicator
2024	$ 3,472,021
2023	2,298,973	$ 3,364,226
2022	1,284,843	1,928,023
2021	826,553	1,328,045
2020	404,659	609,341
2019/Prior	522,777	295,840
Prior		533,486
Total loans	8,809,826	8,058,961
Current-period gross writeoffs
Total	36,608	10,184	$ 9,479
Commercial, financial and agricultural
Loan portfolio by credit quality indicator
Total loans	5,089,721	4,802,622
Commercial, financial and agricultural | Domestic | Commercial
Loan portfolio by credit quality indicator
2024	995,267
2023	405,836	811,918
2022	135,176	305,621
2021	214,824	364,498
2020	37,670	50,602
2019/Prior	63,030	21,468
Prior		74,123
Total loans	1,851,803	1,628,230
Current-period gross writeoffs
2024	5,711
2023	2,689	7,053
2022	25,686	2,187
2021	44	155
2020	14	264
2019		2
Prior	5
Prior		3
Total	34,149	9,664	9,050
Commercial, financial and agricultural | Domestic | Commercial | Pass
Loan portfolio by credit quality indicator
2024	993,045
2023	343,212	791,233
2022	135,057	272,919
2021	214,702	364,271
2020	37,670	50,602
2019/Prior	63,030	21,468
Prior		74,119
Total loans	1,786,716	1,574,612
Commercial, financial and agricultural | Domestic | Commercial | Special Mention
Loan portfolio by credit quality indicator
2023		7,613
2022		1,800
2021		164
Total loans		9,577
Commercial, financial and agricultural | Domestic | Commercial | Watch List - Pass
Loan portfolio by credit quality indicator
2023	11,113	11,865
Total loans	11,113	11,865
Commercial, financial and agricultural | Domestic | Commercial | Watch List - Substandard
Loan portfolio by credit quality indicator
2024	1,341
2023	327	1,180
2022	74	92
2021	122	28
Prior		4
Total loans	1,864	1,304
Commercial, financial and agricultural | Domestic | Commercial | Watch List - Doubtful
Loan portfolio by credit quality indicator
2024	881
2023	51,184	27
2022	45	30,810
2021		35
Total loans	52,110	30,872
Commercial real estate
Loan portfolio by credit quality indicator
Total loans	2,484,454	2,091,622
Commercial real estate | Domestic | Commercial real estate construction development
Loan portfolio by credit quality indicator
2024	1,029,750
2023	937,180	966,695
2022	330,470	687,012
2021	144,221	324,238
2020	39,908	96,400
2019/Prior	2,925	14,058
Prior		3,219
Total loans	2,484,454	2,091,622
Current-period gross writeoffs
2023	1,146
2022	1,082
Total	2,228		2
Commercial real estate | Domestic | Commercial real estate construction development | Pass
Loan portfolio by credit quality indicator
2024	1,029,399
2023	921,180	938,739
2022	322,348	674,037
2021	144,221	324,238
2020	39,908	96,400
2019/Prior	2,925	14,058
Prior		3,219
Total loans	2,459,981	2,050,691
Commercial real estate | Domestic | Commercial real estate construction development | Special Mention
Loan portfolio by credit quality indicator
2023	16,000
Total loans	16,000
Commercial real estate | Domestic | Commercial real estate construction development | Watch List - Substandard
Loan portfolio by credit quality indicator
2024	278
2023		25,230
Total loans	278	25,230
Commercial real estate | Domestic | Commercial real estate construction development | Watch List - Doubtful
Loan portfolio by credit quality indicator
2024	73
2023		2,726
2022	8,122	12,975
Total loans	8,195	15,701
Commercial real estate | Domestic | Commercial real estate: farmland & commercial
Loan portfolio by credit quality indicator
2024	903,313
2023	699,730	1,040,592
2022	545,802	631,029
2021	312,757	419,048
2020	220,867	270,009
2019/Prior	245,334	184,248
Prior		248,627
Total loans	2,927,803	2,793,553
Current-period gross writeoffs
Total			16
Commercial real estate | Domestic | Commercial real estate: farmland & commercial | Pass
Loan portfolio by credit quality indicator
2024	814,273
2023	631,806	888,878
2022	531,035	628,653
2021	312,757	415,458
2020	220,510	267,705
2019/Prior	245,334	184,164
Prior		248,626
Total loans	2,755,715	2,633,484
Commercial real estate | Domestic | Commercial real estate: farmland & commercial | Special Mention
Loan portfolio by credit quality indicator
2024	643
2023	67,567	5,205
2021		3,357
Total loans	68,210	8,562
Commercial real estate | Domestic | Commercial real estate: farmland & commercial | Watch List - Pass
Loan portfolio by credit quality indicator
2024	16,490
2023		16,654
2022		87
2021		233
Total loans	16,490	16,974
Commercial real estate | Domestic | Commercial real estate: farmland & commercial | Watch List - Substandard
Loan portfolio by credit quality indicator
2024	18,934
2023	242	129,644
2022	2,122	2,201
2020	357	2,304
2019/Prior		84
Prior		1
Total loans	21,655	134,234
Commercial real estate | Domestic | Commercial real estate: farmland & commercial | Watch List - Doubtful
Loan portfolio by credit quality indicator
2024	52,973
2023	115	211
2022	12,645	88
Total loans	65,733	299
Commercial real estate | Domestic | Commercial real estate: multifamily
Loan portfolio by credit quality indicator
2024	107,993
2023	36,602	123,523
2022	108,830	94,647
2021	18,621	42,081
2020	8,198	73,652
2019/Prior	29,871	10,743
Prior		36,193
Total loans	310,115	380,839
Commercial real estate | Domestic | Commercial real estate: multifamily | Pass
Loan portfolio by credit quality indicator
2024	90,092
2023	11,538	123,523
2022	108,830	94,551
2021	18,621	42,081
2020	8,198	73,652
2019/Prior	29,871	10,743
Prior		36,193
Total loans	267,150	380,743
Commercial real estate | Domestic | Commercial real estate: multifamily | Watch List - Doubtful
Loan portfolio by credit quality indicator
2024	17,901
2023	25,064
2022		96
2021
2020
2019/Prior
Prior
Total loans	42,965	96
Real estate - mortgage
Loan portfolio by credit quality indicator
Total loans	999,313	938,901
Real estate - mortgage | Domestic | Residential First Lien
Loan portfolio by credit quality indicator
2024	180,861
2023	107,100	180,127
2022	81,640	83,661
2021	57,777	68,409
2020	29,316	39,935
2019/Prior	73,390	27,499
Prior		78,401
Total loans	530,084	478,032
Current-period gross writeoffs
Prior	46
Prior		43
Total	46	43	160
Real estate - mortgage | Domestic | Residential First Lien | Pass
Loan portfolio by credit quality indicator
2024	180,743
2023	107,100	180,127
2022	81,618	83,568
2021	57,503	68,082
2020	29,316	39,935
2019/Prior	73,390	27,499
Prior		78,306
Total loans	529,670	477,517
Real estate - mortgage | Domestic | Residential First Lien | Watch List - Substandard
Loan portfolio by credit quality indicator
2024	95
2021	274	327
Prior		95
Total loans	369	422
Real estate - mortgage | Domestic | Residential First Lien | Watch List - Doubtful
Loan portfolio by credit quality indicator
2024	23
2022	22	93
Total loans	45	93
Real estate - mortgage | Domestic | Residential Junior Lien
Loan portfolio by credit quality indicator
2024	91,343
2023	73,740	88,628
2022	65,144	76,845
2021	70,969	96,411
2020	65,799	76,490
2019/Prior	102,234	34,870
Prior		87,625
Total loans	469,229	460,869
Current-period gross writeoffs
Prior		298
Total		298	28
Real estate - mortgage | Domestic | Residential Junior Lien | Pass
Loan portfolio by credit quality indicator
2024	91,202
2023	73,740	88,628
2022	65,144	76,845
2021	70,969	96,411
2020	65,799	76,490
2019/Prior	102,234	34,870
Prior		87,625
Total loans	469,088	460,869
Real estate - mortgage | Domestic | Residential Junior Lien | Watch List - Doubtful
Loan portfolio by credit quality indicator
2024	141
Total loans	141
Consumer
Loan portfolio by credit quality indicator
Total loans	49,777	45,121
Consumer | Domestic
Loan portfolio by credit quality indicator
2024	38,778
2023	8,137	36,639
2022	904	5,366
2021	422	1,043
2020	22	237
2019/Prior	1,514	157
Prior		1,679
Total loans	49,777	45,121
Current-period gross writeoffs
2024	43
2023	120	54
2022	22	115
2021		9
2019		1
Total	185	179	$ 223
Consumer | Domestic | Pass
Loan portfolio by credit quality indicator
2024	38,778
2023	8,137	36,639
2022	904	5,366
2021	422	1,043
2020	22	237
2019/Prior	1,514	157
Prior		1,679
Total loans	49,777	45,121
Foreign
Loan portfolio by credit quality indicator
Total loans	186,561	180,695
Foreign | Foreign
Loan portfolio by credit quality indicator
2024	124,716
2023	30,648	116,104
2022	16,877	43,842
2021	6,962	12,317
2020	2,879	2,016
2019/Prior	4,479	2,797
Prior		3,619
Total loans	186,561	180,695
Foreign | Foreign | Pass
Loan portfolio by credit quality indicator
2024	124,716
2023	30,648	116,104
2022	16,877	43,842
2021	6,962	12,317
2020	2,879	2,016
2019/Prior	4,479	2,797
Prior		3,619
Total loans	$ 186,561	$ 180,695

Bank Premises and Equipment (De

Bank Premises and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Bank premises and equipment
Less: accumulated depreciation	$ (601,991)	$ (579,387)
Bank premises and equipment, net	428,221	437,094
Bank buildings and improvements
Bank premises and equipment
Bank premises and equipment, gross	$ 588,093	582,075
Bank buildings and improvements | Minimum
Bank premises and equipment
Estimated useful lives	5 years
Bank buildings and improvements | Maximum
Bank premises and equipment
Estimated useful lives	39 years
Furniture, equipment and vehicles
Bank premises and equipment
Bank premises and equipment, gross	$ 331,200	325,855
Furniture, equipment and vehicles | Minimum
Bank premises and equipment
Estimated useful lives	1 year
Furniture, equipment and vehicles | Maximum
Bank premises and equipment
Estimated useful lives	20 years
Land
Bank premises and equipment
Bank premises and equipment, gross	$ 110,919	$ 108,551

Deposits (Details)

Deposits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Demand non-interest bearing
Domestic	$ 3,790,875	$ 4,126,635
Foreign	821,469	904,210
Total demand non-interest bearing	4,612,344	5,030,845
Savings and interest-bearing demand
Domestic	3,317,461	3,161,411
Foreign	1,282,496	1,207,121
Total savings and interest-bearing demand	4,599,957	4,368,532
$100,000 or more
Time, certificate of deposit	2,266,820
Less than $100,000
Domestic	317,220	289,565
Foreign	315,503	268,483
Total time, certificates of deposit	2,899,543	2,425,177
Total deposits	12,111,844	11,824,554
Savings and interest-bearing demand
Domestic	56,759	42,148	$ 9,196
Foreign	25,153	18,189	3,490
Total savings and interest-bearing demand	81,912	60,337	12,686
$100,000 or more
Domestic	32,283	18,597	5,528
Foreign	47,420	25,471	3,867
Less than $100,000
Domestic	8,748	4,592	1,027
Foreign	8,517	4,498	735
Total time, certificates of deposit	96,968	53,158	11,157
Total interest expense on deposits	178,880	113,495	$ 23,843
Domestic
$100,000 or more
Time, certificate of deposit	876,254	763,419
Foreign
$100,000 or more
Time, certificate of deposit	$ 1,390,566	$ 1,103,710

Deposits (Scheduled Maturities)

Deposits (Scheduled Maturities) (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Scheduled maturities of time deposits
2025	$ 2,730,997
2026	119,228
2027	32,607
2028	16,285
2029	424
Thereafter	2
Total time, certificates of deposit	2,899,543	$ 2,425,177
Time Deposits 250,000 or exceed	1,494,267	$ 1,202,170
Scheduled maturities of time deposits in amounts of $100,000 or more
Due within 3 months or less	982,133
Due after 3 months and within 6 months	698,349
Due after 6 months and within 12 months	465,005
Due after 12 months	121,333
Total	$ 2,266,820

Securities Sold Under Repurch_3

Securities Sold Under Repurchase Agreements (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Collateral Securities and Repurchase Borrowing agreements
Average outstanding amount	$ 616,208	$ 469,152
Maximum amount outstanding at any month end	713,772	544,418
Collateralized Securities, Book Value of Securities Sold	793,546	694,112
Collateralized securities, Fair Value of Securities Sold	702,566	609,701
Repurchase Borrowing, Balance of Liability	$ 535,322	$ 530,416
Repurchase Borrowing, Weighted Average Interest Rate (as a percent)	3.12%	3.78%
Overnight agreements
Collateral Securities and Repurchase Borrowing agreements
Collateralized Securities, Book Value of Securities Sold	$ 775,760	$ 667,647
Collateralized securities, Fair Value of Securities Sold	687,091	587,673
Repurchase Borrowing, Balance of Liability	$ 523,152	$ 518,650
Repurchase Borrowing, Weighted Average Interest Rate (as a percent)	3.09%	3.76%
1 to 29 days
Collateral Securities and Repurchase Borrowing agreements
Collateralized Securities, Book Value of Securities Sold	$ 15,872	$ 24,842
Collateralized securities, Fair Value of Securities Sold	13,604	20,454
Repurchase Borrowing, Balance of Liability	$ 11,100	$ 10,696
Repurchase Borrowing, Weighted Average Interest Rate (as a percent)	4.75%	4.50%
Over 90 days
Collateral Securities and Repurchase Borrowing agreements
Collateralized Securities, Book Value of Securities Sold	$ 1,914	$ 1,623
Collateralized securities, Fair Value of Securities Sold	1,871	1,574
Repurchase Borrowing, Balance of Liability	$ 1,070	$ 1,070
Repurchase Borrowing, Weighted Average Interest Rate (as a percent)	4%	4%

Other Borrowed Funds (Details)

Other Borrowed Funds (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($) loan	Dec. 31, 2023 USD ($)
Federal Home Loan Bank advances
Other borrowed funds	$ 10,541	$ 10,745
Long-term Debt
Federal Home Loan Bank advances
Other borrowed funds	$ 10,541	$ 10,745
Rate on balance outstanding at year end (as a percent)	2.61%	2.61%
Average daily balance	$ 10,635	$ 10,837
Average rate (as a percent)	2.61%	2.61%
Maximum amount outstanding at any month end	$ 10,729	$ 10,928
Long-term Debt | Federal Home Loan Bank amortizing advances
Federal Home Loan Bank advances
Number of amortizing advances | loan	2
Amortizing in 2025	$ 210
Amortizing in 2026	215
Amortizing in 2027	221
Amortizing in 2028	227
Amortizing in 2029	233
Long-term Debt | Federal Home Loan Bank advances maturing December 2033
Federal Home Loan Bank advances
Other borrowed funds	2,852
Long-term Debt | Federal Home Loan Bank advances maturing November 2033
Federal Home Loan Bank advances
Other borrowed funds	$ 7,689

Junior Subordinated Interest _3

Junior Subordinated Interest Deferrable Debentures (Details)	12 Months Ended
	Dec. 31, 2024 USD ($) item	Dec. 31, 2023 USD ($)
Junior Subordinated Interest Deferrable Debentures
Number of statutory business trusts issuing trust preferred securities | item	4
Junior subordinated deferrable interest debentures | $	$ 108,868,000	$ 108,868,000
Maximum number of consecutive quarterly period | item	20
Percentage of capital securities issued by trust qualifying as Tier I capital, maximum	25%
Percentage of capital securities issued by trust qualifying as Tier II capital, minimum	25%
Capital securities issued by the trust, qualifying as Tier I capital | $	$ 108,868,000	$ 108,868,000

Junior Subordinated Interest _4

Junior Subordinated Interest Deferrable Debentures - Key Information (Details) - USD ($) $ in Thousands		12 Months Ended
	Jul. 01, 2023	Dec. 31, 2024	Dec. 31, 2023
Junior subordinated interest deferrable debentures, major types of business trusts
Junior subordinated deferrable interest debentures		$ 108,868	$ 108,868
Trust IX
Junior subordinated interest deferrable debentures, major types of business trusts
Junior subordinated deferrable interest debentures		$ 41,238
Interest rate (as a percent)		6.47%
Interest rate index		SOFR
Spread on interest rate index (as a percent)		1.62%
Trust X
Junior subordinated interest deferrable debentures, major types of business trusts
Junior subordinated deferrable interest debentures		$ 21,021
Interest rate (as a percent)		6.48%
Interest rate index		SOFR
Spread on interest rate index (as a percent)		1.65%
Trust XI
Junior subordinated interest deferrable debentures, major types of business trusts
Junior subordinated deferrable interest debentures		$ 25,990
Interest rate (as a percent)		6.47%
Interest rate index		SOFR
Spread on interest rate index (as a percent)		1.62%
Trust XII
Junior subordinated interest deferrable debentures, major types of business trusts
Junior subordinated deferrable interest debentures		$ 20,619
Interest rate (as a percent)		6.21%
Interest rate index		SOFR
Spread on interest rate index (as a percent)		1.45%
Capital and Common Securities
Junior subordinated interest deferrable debentures, major types of business trusts
Spread on interest rate index (as a percent)	0.26%

Earnings per Share ("EPS") (Det

Earnings per Share ("EPS") (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Basic EPS
Net income available to common shareholders	$ 409,167	$ 411,768	$ 300,232
Shares (Denominator)	62,180,448	62,082,827	62,658,414
Per Share Amount	$ 6.58	$ 6.63	$ 4.79
Diluted EPS
Net income available to common shareholders	$ 409,167	$ 411,768	$ 300,232
Potential dilutive common shares	117,830	138,774	151,820
Shares (Denominator)	62,298,278	62,221,601	62,810,234
Per Share Amount (in dollars per share)	$ 6.57	$ 6.62	$ 4.78

Employees' Profit Sharing Plan

Employees' Profit Sharing Plan (Details) - Deferred Profit-Sharing Plan - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Employees' profit sharing plan
Minimum period of continuous employment to be fully vested	1 year
Profit sharing costs	$ 4,460	$ 4,011	$ 4,300

International Operations (Detai

International Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Loans and Leases Receivable, Other Information [Abstract]
Loans	$ 8,809,826	$ 8,058,961
Less allowance for credit losses	(156,537)	(157,069)	$ (125,972)	$ (110,374)
Net loans	8,653,289	7,901,892
Accrued interest receivable	72,175	65,302
International Banking Services
Loans and Leases Receivable, Other Information [Abstract]
Accrued interest receivable	991	515
Outstanding standby and commercial letters of credit	149,543	147,551
Revenues	8,669	8,212	$ 4,821
International Banking Services | Foreign
Loans and Leases Receivable, Other Information [Abstract]
Loans	186,561	180,695
Less allowance for credit losses	(1,346)	(1,283)
Net loans	185,215	179,412
International Banking Services | Foreign | Commercial
Loans and Leases Receivable, Other Information [Abstract]
Loans	99,836	106,241
International Banking Services | Foreign | Others
Loans and Leases Receivable, Other Information [Abstract]
Loans	$ 86,725	$ 74,454

Income Taxes (Current and Defer

Income Taxes (Current and Deferred Portions of Net Income Tax Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Current
U.S.	$ 105,114	$ 82,657	$ 66,670
State	5,905	6,137	5,118
Total current taxes	111,019	88,794	71,788
Deferred
U.S.	(11,430)	23,001	10,555
State	(36)	(51)	64
Total deferred taxes	(11,466)	22,950	10,619
Total income taxes	$ 99,553	$ 111,744	$ 82,407

Income Taxes (Income Tax Expens

Income Taxes (Income Tax Expense Differences from the Amount Computed by Applying the U.S. Federal Income Tax Rate) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Taxes
U.S. Federal income tax rate (as a percent)	21%	21%	21%
Reasons for the difference of income tax expense
Computed expected tax expense	$ 107,134	$ 110,065	$ 80,893
Change in taxes resulting from:
Tax-exempt interest income	(3,233)	(3,663)	(2,433)
State tax, net of federal income taxes and tax credit and refunds	4,636	4,808	4,094
Other investment income	(2,626)	(2,761)	(1,391)
Net investment expense, low-income housing investment	(2,531)	1,974	1,906
Other	(3,827)	1,321	(662)
Total income taxes	$ 99,553	$ 111,744	$ 82,407

Income Taxes (Deferred Tax Asse

Income Taxes (Deferred Tax Assets and Deferred Tax Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Deferred tax assets:
Loans receivable, principally due to the allowance for probable loan losses	$ 40,883	$ 32,136
Other real estate owned	1,443	1,649
Accrued expenses	539	581
Net unrealized losses on available for sale investment securities	105,339	110,584
Other	1,480	1,352
Total deferred tax assets	149,684	146,302
Deferred tax liabilities:
Bank premises and equipment, principally due to differences on depreciation	(14,648)	(14,879)
Impairment charges on available-for-securities	(19)	(19)
Identified intangible assets and goodwill	(14,151)	(14,151)
Partnership investment pass through	(55,117)	(58,376)
Other	(4,189)	(3,321)
Total deferred tax liabilities	88,124	90,746
Net deferred tax asset	$ 61,560	$ 55,556

Stock Options and Stock Appre_3

Stock Options and Stock Appreciation Rights - Options (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Apr. 05, 2012
Employee Stock Option
Stock option details
Shares available for future grants				800,000
Maximum exercisable period for granted share-based compensation	10 years
Stock option activity
Options outstanding at the beginning of the period (in shares)	383,865
Less:
Options exercised (in shares)	(149,773)
Options forfeited (in shares)	(21,937)
Options outstanding at the end of the period (in shares)	212,155	383,865
Options fully vested and exercisable at the end of the period (in shares)	121,714
Stock Options, Weighted average exercise price
Options outstanding at the beginning, weighted average exercise price (in dollars per share)	$ 30.65
Less:
Options exercised, weighted average exercise price (in dollars per share)	25.08
Options forfeited, weighted average exercise price (in dollars per share)	23.93
Options outstanding at the end, weighted average exercise price (in dollars per share)	35.27	$ 30.65
Options fully vested and exercisable at the end, weighted average exercise price (in dollars per share)	$ 35.92
Stock Options, Weighted average remaining contractual term (years)
Options outstanding at the end, weighted average remaining contractual term (years)	4 years 1 month 17 days
Options fully vested and exercisable at the end, weighted average remaining contractual term (years)	3 years 3 months 21 days
Stock Options, Aggregate intrinsic value
Options outstanding at the end, aggregate intrinsic value	$ 5,918,000
Options fully vested and exercisable at the end, aggregate intrinsic value	3,316,000
Stock-based compensation expense	214,000	$ 330,000	$ 449,000
Stock-based compensation cost, unrecognized	$ 218,000
Stock-based compensation cost, unrecognized, weighted-average period of recognition	1 year 4 months 24 days
Other information pertaining to option activity
Weighted average grant date fair value of stock options granted (in dollars per share)			$ 11.24
Total fair value of stock options vested	$ 616,286	514,000	$ 514,000
Total intrinsic value of stock options exercised	$ 4,640,000	$ 1,060,000	$ 1,670,000
Incentive Stock Options to 10 Percent Shareholders
Stock option details
Maximum exercisable period for granted share-based compensation	5 years

Stock Options and Stock Appre_4

Stock Options and Stock Appreciation Rights - SARs (Details) - USD ($)		12 Months Ended
	Apr. 18, 2022	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
SARs
SARs fully vested and exercisable		22,435
Stock Appreciation Rights (SARs)
Stock option details
Shares available for future grants	750,000
Maximum exercisable period for granted share-based compensation	10 years
Number of rights issued		8,000
Base value of units issued (per unit)		$ 53.91
Vesting period	8 years
SARs
Outstanding beginning balance		465,250
Granted		8,000
Exercised		(2,548)
Forfeited		(14,000)
Outstanding ending balance		456,702	465,250
Weighted average exercise price
Weighted average exercise price, beginning balance (per share)		$ 39.35
Weighted average exercise price, granted (per share)		53.91
Weighted average exercise price, exercised (per share)		39.33
Weighted average exercise price, forfeited (per share)		39.33
Weighted average exercise price, ending balance (per share)		39.61	$ 39.35
SARs Weighted average exercise price		$ 39.35
Aggregate intrinsic value
Aggregate intrinsic value		$ 10,757,000
SAR Aggregate intrinsic value		$ 534,000
Weighted average remaining contractual term (years)		7 years 6 months 14 days
SAR Weighted average remaining contractual term (years)		7 years 6 months
Fair Value of Liability		$ 4,540,000	$ 1,464,000
Stock-based compensation expense		3,144,000	$ 918,000	$ 546,000
Stock-based compensation cost, unrecognized		$ 8,309,000
Stock-based compensation cost, unrecognized, weighted-average period of recognition		7 years 6 months

Transactions with Related Par_2

Transactions with Related Parties (Details) - USD ($)	Dec. 31, 2024	Dec. 31, 2023
Transactions with Related Parties
Receivables from related parties	$ 6,669,000	$ 13,335,000

Financial Instruments with Of_3

Financial Instruments with Off-Statement of Condition Risk and Concentrations of Credit Risk (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Maximum
Financial amounts of instruments, whose contract amounts represent credit risks
Credit risk commitment, maximum expiration date	1 year
Commitments to Extend Credit
Financial amounts of instruments, whose contract amounts represent credit risks
Outstanding amount of financial instruments whose, contract amounts represent credit risks	$ 3,440,252,000
Credit Card Lines
Financial amounts of instruments, whose contract amounts represent credit risks
Outstanding amount of financial instruments whose, contract amounts represent credit risks	12,985,000
Standby Letters of Credit
Financial amounts of instruments, whose contract amounts represent credit risks
Outstanding amount of financial instruments whose, contract amounts represent credit risks	147,435,000
Guarantee obligations, maximum exposure	147,435,000
Commercial Letters of Credit
Financial amounts of instruments, whose contract amounts represent credit risks
Outstanding amount of financial instruments whose, contract amounts represent credit risks	2,108,000
Unsecured Letters of Credit
Financial amounts of instruments, whose contract amounts represent credit risks
Unsecured letters of credit	$ 23,334,000	$ 23,677,000

Capital Requirements (Details)

Capital Requirements (Details)	12 Months Ended
	Dec. 31, 2024 USD ($)
Capital Requirements
Dividend payable by subsidiaries, maximum	$ 1,440,000,000

Capital Requirements - Capital

Capital Requirements - Capital Amounts and Ratios (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Capital Requirements
Percentage of capital securities issued by trust qualifying as Tier II capital, minimum	25%
Junior subordinated deferrable interest debentures	$ 108,868	$ 108,868
Parent Company
Capital Requirements
Common Equity Tier 1 Capital (to Risk Weighted Assets), Actual Amount	$ 2,893,228	$ 2,563,130
Common Equity Tier 1 Capital (to Risk Weighted Assets), Actual Ratio (as a percent)	0.2242%	0.2172%
Total Capital (to Risk Weighted Assets), Actual Amount	$ 3,136,215	$ 2,790,171
Total Capital (to Risk Weighted Assets), Actual Ratio (as a percent)	0.2431	0.2365
Tier 1 Capital (to Risk Weighted Assets), Actual Amount	$ 2,974,881	$ 2,642,492
Tier 1 capital (to Risk Weighted Assets), Actual Ratio (as a percent)	0.2306	0.2239
Tier 1 Capital (to Average Assets), Actual Amount	$ 2,974,881	$ 2,642,492
Tier 1 capital (to Average Assets), Actual Ratio (as a percent)	0.1884	0.1746
Parent Company | Minimum
Capital Requirements
Common Equity Tier 1 Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Amount	$ 903,203	$ 825,968
Common Equity Tier 1 Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Ratio (as a percent)	0.07%	0.07%
Total Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Amount	$ 1,354,805	$ 1,238,952
Total Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Ratio (as a percent)	0.105	0.105
Tier 1 Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Amount	$ 1,096,747	$ 1,002,961
Tier 1 Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Ratio (as a percent)	0.085	0.085
Tier 1 Capital (to Average Assets), For Capital Adequacy Purposes Amount	$ 631,755	$ 605,262
Tier 1 Capital (to Average Assets), For Capital Adequacy Purposes Ratio (as a percent)	0.04	0.04
International Bank of Commerce Laredo
Capital Requirements
Common Equity Tier 1 Capital (to Risk Weighted Assets), Actual Amount	$ 1,638,720	$ 1,444,775
Common Equity Tier 1 Capital (to Risk Weighted Assets), Actual Ratio (as a percent)	0.1946%	0.1854%
Total Capital (to Risk Weighted Assets), Actual Amount	$ 1,744,057	$ 1,542,462
Total Capital (to Risk Weighted Assets), Actual Ratio (as a percent)	0.2071	0.1979
Tier 1 Capital (to Risk Weighted Assets), Actual Amount	$ 1,638,720	$ 1,444,775
Tier 1 capital (to Risk Weighted Assets), Actual Ratio (as a percent)	0.1946	0.1854
Tier 1 Capital (to Average Assets), Actual Amount	$ 1,638,720	$ 1,444,775
Tier 1 capital (to Average Assets), Actual Ratio (as a percent)	0.1767	0.164
International Bank of Commerce Laredo | Minimum
Capital Requirements
Common Equity Tier 1 Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Amount	$ 589,359	$ 545,611
Common Equity Tier 1 Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 547,262	$ 506,639
Common Equity Tier 1 Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Ratio (as a percent)	0.07%	0.07%
Common Equity Tier 1 Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio (as a percent)	0.065%	0.065%
Total Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Amount	$ 884,039	$ 818,416
Total Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 841,942	$ 779,444
Total Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Ratio (as a percent)	0.105	0.105
Total Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio (as a percent)	0.10	0.10
Tier 1 Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Amount	$ 715,651	$ 662,527
Tier 1 Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 673,554	$ 623,555
Tier 1 Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Ratio (as a percent)	0.085	0.085
Tier 1 Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio (as a percent)	0.08	0.08
Tier 1 Capital (to Average Assets), For Capital Adequacy Purposes Amount	$ 370,911	$ 352,412
Tier 1 Capital (to Average Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 463,639	$ 440,515
Tier 1 Capital (to Average Assets), For Capital Adequacy Purposes Ratio (as a percent)	0.04	0.04
Tier 1 Capital (to Average Assets), To Be well Capitalized Under Prompt Corrective Action Provisions Ratio (as a percent)	0.05	0.05
International Bank of Commerce Brownsville
Capital Requirements
Common Equity Tier 1 Capital (to Risk Weighted Assets), Actual Amount	$ 554,879	$ 232,965
Common Equity Tier 1 Capital (to Risk Weighted Assets), Actual Ratio (as a percent)	0.2611%	0.2072%
Total Capital (to Risk Weighted Assets), Actual Amount	$ 578,515	$ 247,031
Total Capital (to Risk Weighted Assets), Actual Ratio (as a percent)	0.2722	0.2197
Tier 1 Capital (to Risk Weighted Assets), Actual Amount	$ 554,879	$ 232,965
Tier 1 capital (to Risk Weighted Assets), Actual Ratio (as a percent)	0.2611	0.2072
Tier 1 Capital (to Average Assets), Actual Amount	$ 554,879	$ 232,965
Tier 1 capital (to Average Assets), Actual Ratio (as a percent)	0.1308	0.1472
International Bank of Commerce Brownsville | Minimum
Capital Requirements
Common Equity Tier 1 Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Amount	$ 148,761	$ 78,718
Common Equity Tier 1 Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 138,136	$ 73,095
Common Equity Tier 1 Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Ratio (as a percent)	0.07%	0.07%
Common Equity Tier 1 Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio (as a percent)	0.065%	0.065%
Total Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Amount	$ 223,142	$ 118,076
Total Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 212,516	$ 112,454
Total Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Ratio (as a percent)	0.105	0.105
Total Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio (as a percent)	0.10	0.10
Tier 1 Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Amount	$ 180,639	$ 95,586
Tier 1 Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 170,013	$ 89,963
Tier 1 Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Ratio (as a percent)	0.085	0.085
Tier 1 Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio (as a percent)	0.08	0.08
Tier 1 Capital (to Average Assets), For Capital Adequacy Purposes Amount	$ 169,680	$ 63,294
Tier 1 Capital (to Average Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 212,100	$ 79,117
Tier 1 Capital (to Average Assets), For Capital Adequacy Purposes Ratio (as a percent)	0.04	0.04
Tier 1 Capital (to Average Assets), To Be well Capitalized Under Prompt Corrective Action Provisions Ratio (as a percent)	0.05	0.05
International Bank Of Commerce Oklahoma
Capital Requirements
Common Equity Tier 1 Capital (to Risk Weighted Assets), Actual Amount	$ 240,023	$ 477,390
Common Equity Tier 1 Capital (to Risk Weighted Assets), Actual Ratio (as a percent)	0.2057%	0.2441%
Total Capital (to Risk Weighted Assets), Actual Amount	$ 254,659	$ 500,268
Total Capital (to Risk Weighted Assets), Actual Ratio (as a percent)	0.2182	0.2558
Tier 1 Capital (to Risk Weighted Assets), Actual Amount	$ 240,023	$ 477,390
Tier 1 capital (to Risk Weighted Assets), Actual Ratio (as a percent)	0.2057	0.2441
Tier 1 Capital (to Average Assets), Actual Amount	$ 240,023	$ 477,390
Tier 1 capital (to Average Assets), Actual Ratio (as a percent)	0.1447	0.1179
International Bank Of Commerce Oklahoma | Minimum
Capital Requirements
Common Equity Tier 1 Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Amount	$ 81,679	$ 136,883
Common Equity Tier 1 Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 75,845	$ 127,106
Common Equity Tier 1 Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Ratio (as a percent)	0.07%	0.07%
Common Equity Tier 1 Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio (as a percent)	0.065%	0.065%
Total Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Amount	$ 122,519	$ 205,325
Total Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 116,685	$ 195,547
Total Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Ratio (as a percent)	0.105	0.105
Total Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio (as a percent)	0.10	0.10
Tier 1 Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Amount	$ 99,182	$ 166,215
Tier 1 Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 93,348	$ 156,438
Tier 1 Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Ratio (as a percent)	0.085	0.085
Tier 1 Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio (as a percent)	0.08	0.08
Tier 1 Capital (to Average Assets), For Capital Adequacy Purposes Amount	$ 66,341	$ 161,919
Tier 1 Capital (to Average Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 82,926	$ 202,398
Tier 1 Capital (to Average Assets), For Capital Adequacy Purposes Ratio (as a percent)	0.04	0.04
Tier 1 Capital (to Average Assets), To Be well Capitalized Under Prompt Corrective Action Provisions Ratio (as a percent)	0.05	0.05
Commerce Bank
Capital Requirements
Common Equity Tier 1 Capital (to Risk Weighted Assets), Actual Amount	$ 102,200	$ 64,110
Common Equity Tier 1 Capital (to Risk Weighted Assets), Actual Ratio (as a percent)	0.375%	0.3118%
Total Capital (to Risk Weighted Assets), Actual Amount	$ 105,090
Total Capital (to Risk Weighted Assets), Actual Ratio (as a percent)	0.3856	0.3243
Tier 1 Capital (to Risk Weighted Assets), Actual Amount	$ 102,200	$ 66,680
Tier 1 capital (to Risk Weighted Assets), Actual Ratio (as a percent)	0.375	0.3118
Tier 1 Capital (to Average Assets), Actual Amount	$ 102,200	$ 64,110
Tier 1 capital (to Average Assets), Actual Ratio (as a percent)	0.1353	0.1326
Commerce Bank | Minimum
Capital Requirements
Common Equity Tier 1 Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Amount	$ 19,077	$ 14,394
Common Equity Tier 1 Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 17,714	$ 13,366
Common Equity Tier 1 Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Ratio (as a percent)	0.07%	0.07%
Common Equity Tier 1 Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio (as a percent)	0.065%	0.065%
Total Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Amount	$ 28,616	$ 21,591
Total Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 27,253	$ 20,563
Total Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Ratio (as a percent)	0.105	0.105
Total Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio (as a percent)	0.10	0.10
Tier 1 Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Amount	$ 23,165	$ 17,478
Tier 1 Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 21,802	$ 16,450
Tier 1 Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Ratio (as a percent)	0.085	0.085
Tier 1 Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio (as a percent)	0.08	0.08
Tier 1 Capital (to Average Assets), For Capital Adequacy Purposes Amount	$ 30,219	$ 19,338
Tier 1 Capital (to Average Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 37,774	$ 24,172
Tier 1 Capital (to Average Assets), For Capital Adequacy Purposes Ratio (as a percent)	0.04	0.04
Tier 1 Capital (to Average Assets), To Be well Capitalized Under Prompt Corrective Action Provisions Ratio (as a percent)	0.05	0.05
International Bank of Commerce Zapata
Capital Requirements
Common Equity Tier 1 Capital (to Risk Weighted Assets), Actual Amount	$ 66,932	$ 97,334
Common Equity Tier 1 Capital (to Risk Weighted Assets), Actual Ratio (as a percent)	0.3274%	0.3657%
Total Capital (to Risk Weighted Assets), Actual Amount	$ 69,278	$ 100,660
Total Capital (to Risk Weighted Assets), Actual Ratio (as a percent)	0.3389	0.3782
Tier 1 Capital (to Risk Weighted Assets), Actual Amount	$ 66,932	$ 97,334
Tier 1 capital (to Risk Weighted Assets), Actual Ratio (as a percent)	0.3274	0.3657
Tier 1 Capital (to Average Assets), Actual Amount	$ 66,932	$ 97,334
Tier 1 capital (to Average Assets), Actual Ratio (as a percent)	0.1344	0.145
International Bank of Commerce Zapata | Minimum
Capital Requirements
Common Equity Tier 1 Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Amount	$ 14,310	$ 18,628
Common Equity Tier 1 Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 13,287	$ 17,298
Common Equity Tier 1 Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Ratio (as a percent)	0.07%	0.07%
Common Equity Tier 1 Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio (as a percent)	0.065%	0.065%
Total Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Amount	$ 21,464	$ 27,943
Total Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 20,442	$ 26,612
Total Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Ratio (as a percent)	0.105	0.105
Total Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio (as a percent)	0.10	0.10
Tier 1 Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Amount	$ 17,376	$ 22,620
Tier 1 Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 16,354	$ 21,290
Tier 1 Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Ratio (as a percent)	0.085	0.085
Tier 1 Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio (as a percent)	0.08	0.08
Tier 1 Capital (to Average Assets), For Capital Adequacy Purposes Amount	$ 19,917	$ 26,858
Tier 1 Capital (to Average Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 24,896	$ 33,572
Tier 1 Capital (to Average Assets), For Capital Adequacy Purposes Ratio (as a percent)	0.04	0.04
Tier 1 Capital (to Average Assets), To Be well Capitalized Under Prompt Corrective Action Provisions Ratio (as a percent)	0.05	0.05

Fair Value - Fair Value By Leve

Fair Value - Fair Value By Level (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Assets:
Available for sale debt securities	$ 4,987,916	$ 4,822,341
Equity Securities	5,394	5,417
Estimate of Fair Value Measurement
Assets:
Available for sale debt securities	4,987,916	4,822,341
Estimate of Fair Value Measurement | Residential mortgage-backed securities
Assets:
Available for sale debt securities	4,835,176	4,660,099
Estimate of Fair Value Measurement | States and political subdivisions
Assets:
Available for sale debt securities	152,740	162,242
Recurring | Fair Value, Inputs, Level 1
Assets:
Equity Securities	5,394	5,417
Marketable Securities	5,394	5,417
Recurring | Fair Value, Inputs, Level 2
Assets:
Marketable Securities	4,987,917	4,822,341
Recurring | Fair Value, Inputs, Level 2 | Residential mortgage-backed securities
Assets:
Available for sale debt securities	4,835,176	4,660,099
Recurring | Fair Value, Inputs, Level 2 | States and political subdivisions
Assets:
Available for sale debt securities	152,741	162,242
Recurring | Estimate of Fair Value Measurement
Assets:
Equity Securities	5,394	5,417
Marketable Securities	4,993,311	4,827,758
Recurring | Estimate of Fair Value Measurement | Residential mortgage-backed securities
Assets:
Available for sale debt securities	4,835,176	4,660,099
Recurring | Estimate of Fair Value Measurement | States and political subdivisions
Assets:
Available for sale debt securities	$ 152,741	$ 162,242

Fair Value - Fair Value Measure

Fair Value - Fair Value Measurement and Assumptions (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Non-financial assets:
Other real estate owned	$ 28,193,000	$ 26,728,000
Assumptions used in discounted cash flow model to determine fair value of investments classified within level 3
Doubtful and Impaired commercial collateral dependent loans	168,621,000	46,491,000
Impaired commercial collateral dependent receivables appraisals to determine fair value within immediately preceding twelve months	110,583,000	1,272,000
Impaired collateral dependent commercial loans with internal evaluation completed within last twelve months	0	35,061,000
Charges to allowance for probable loan losses in connection with other real estate owned	2,228,000	0	$ 2,000
Adjustment to fair value in connection with other real estate owned	632,000	2,538,000	$ 1,627,000
Fair Value, Measurements, Nonrecurring
Assumptions used in discounted cash flow model to determine fair value of investments classified within level 3
Change in net provision, impaired loans	14,662,000	10,221,000
Change in net provision, other real estate owned	632,000	2,538,000
Fair Value, Measurements, Nonrecurring | Fair Value, Inputs, Level 3
Assets:
Watch-List doubtful loans	169,246,000	46,124,000
Non-financial assets:
Other real estate owned	11,537,000	307,000
Fair Value, Measurements, Nonrecurring | Estimated Fair Value
Assets:
Watch-List doubtful loans	169,246,000	46,124,000
Non-financial assets:
Other real estate owned	$ 11,537,000	$ 307,000

Fair Value - Other Assumptions

Fair Value - Other Assumptions (Details) - USD ($)	Dec. 31, 2024	Dec. 31, 2023
Deposits
Carrying amount of time deposits	$ 2,899,543,000	$ 2,425,177,000
Fair Value, Inputs, Level 3
Loans
Carrying amount of fixed rate performing loans	1,216,156,000	1,199,347,000
Estimated fair value of fixed rate performing loans	1,154,862,000	1,073,892,000
Deposits
Carrying amount of time deposits	2,899,543,000	2,425,177,000
Estimated fair value of time deposits	2,895,245,000	2,428,681,000
Fair Value, Inputs, Level 2
Other borrowed funds
Carrying amount of the long-term FHLB borrowings	10,541,000	10,745,000
Estimated fair value of long-term FHLB borrowings	$ 10,541,000	$ 10,745,000

International Bancshares Corp_7

International Bancshares Corporation (Parent Company Only) Financial Information Statements of Condition (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
ASSETS
Other investments	$ 356,735	$ 343,452
Notes loans	8,653,289	7,901,892
Goodwill	282,532	282,532
Other assets	292,496	250,215
Total assets	15,738,852	15,066,189
Liabilities:
Junior subordinated deferrable interest debentures	108,868	108,868
Other liabilities	175,570	143,832
Total liabilities	12,942,145	12,618,415
Shareholders' equity:
Common shares	96,617	96,467
Surplus	159,333	155,511
Retained earnings	3,356,177	3,029,088
Accumulated other comprehensive loss	(379,054)	(397,889)
Total shareholders' equity before treasury stock	3,233,073	2,883,177
Less cost of shares in treasury	(436,366)	(435,403)
Total shareholders' equity	2,796,707	2,447,774	$ 2,044,759	$ 2,308,481
Total liabilities and shareholders' equity	15,738,852	15,066,189
Parent Company | Reportable legal entities
ASSETS
Cash	65,858	105,184
Other investments	155,416	111,382
Notes loans	60,502	62,150
Investment in subsidiaries	2,622,447	2,281,952
Goodwill	3,365	3,365
Other assets	12,744	8,617
Total assets	2,920,332	2,572,650
Liabilities:
Junior subordinated deferrable interest debentures	108,868	108,868
Due to IBC Trading	21	21
Other liabilities	14,736	15,987
Total liabilities	123,625	124,876
Shareholders' equity:
Common shares	96,617	96,467
Surplus	159,333	155,511
Retained earnings	3,356,177	3,029,088
Accumulated other comprehensive loss	(379,054)	(397,889)
Total shareholders' equity before treasury stock	3,233,073	2,883,177
Less cost of shares in treasury	(436,366)	(435,403)
Total shareholders' equity	2,796,707	2,447,774
Total liabilities and shareholders' equity	$ 2,920,332	$ 2,572,650

International Bancshares Corp_8

International Bancshares Corporation (Parent Company Only) Financial Information Statements of Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Expenses:
Interest expense (Debentures)	$ 7,762	$ 8,123	$ 5,037
Provision for credit loss	31,802	34,576	21,651
Income before federal income taxes and equity in undistributed net income of subsidiaries	508,720	523,512	382,639
Income tax (benefit) expense	99,553	111,744	82,407
Net income	409,167	411,768	300,232
Parent Company | Reportable legal entities
Income:
Dividends from subsidiaries	130,000	179,000	222,175
Interest income on notes receivable	7,602	5,769	2,394
(Loss) income on other investments	(3,356)	(6,150)	8,662
Other	1,059	4	857
Total income	135,305	178,623	234,088
Expenses:
Interest expense (Debentures)	7,762	8,122	5,037
Provision for credit loss	625	500	437
Other	6,252	252	2,291
Total expenses	14,639	8,874	7,765
Income before federal income taxes and equity in undistributed net income of subsidiaries	120,666	169,749	226,323
Income tax (benefit) expense	(833)	(1,365)	504
Income before equity in undistributed net income of subsidiaries	121,499	171,114	225,819
Equity in undistributed net income of subsidiaries	287,668	240,654	74,413
Net income	$ 409,167	$ 411,768	$ 300,232

International Bancshares Corp_9

International Bancshares Corporation (Parent Company Only) Financial Information Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Operating activities:
Net Income (Loss)	$ 409,167	$ 411,768	$ 300,232
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit loss	31,802	34,576	21,651
Unrealized (gain) loss on equity securities with readily determinable fair values	24	(59)	721
Stock compensation expense	214	330	449
(Decrease) increase in other liabilities	41,015	10,757	42,018
Net cash provided by operating activities	473,948	474,432	387,941
Investing activities:
Net increase in loans	(812,477)	(632,976)	(228,340)
Net cash used in investing activities	(985,063)	(1,067,206)	(992,028)
Financing activities:
Redemption of long-term debt		(25,774)
Proceeds from stock transactions	3,758	1,167	1,537
Payments of cash dividends - common	(82,078)	(78,247)	(75,375)
Purchase of treasury stock	(963)	(4,611)	(52,048)
Net cash provided by (used in) financing activities	212,709	(843,892)	(517,431)
Decrease in cash and cash equivalents	(298,406)	(1,436,666)	(1,121,518)
Cash and cash equivalents at beginning of period	651,058	2,087,724	3,209,242
Cash and cash equivalents at end of period	352,652	651,058	2,087,724
Non-cash investing activities:
Net transfers from loans to other investments	25,551
Parent Company | Reportable legal entities
Operating activities:
Net Income (Loss)	409,167	411,768	300,232
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit loss	625	500	437
Unrealized (gain) loss on equity securities with readily determinable fair values	(27)	(14)	36
Stock compensation expense	214	330	449
(Decrease) increase in other liabilities	(1,251)	4,911	1,743
Equity in undistributed net income of subsidiaries	(287,668)	(240,654)	(74,413)
Net cash provided by operating activities	121,060	176,841	228,484
Investing activities:
Net increase in loans	(24,528)	(20,170)	(32,556)
Increase in other assets and other investments	(56,575)	(33,285)	(43,343)
Net cash used in investing activities	(81,103)	(53,455)	(75,899)
Financing activities:
Redemption of long-term debt		(25,774)
Proceeds from stock transactions	3,758	1,167	1,537
Payments of cash dividends - common	(82,078)	(78,247)	(75,375)
Purchase of treasury stock	(963)	(4,611)	(52,048)
Net cash provided by (used in) financing activities	(79,283)	(107,465)	(125,886)
Decrease in cash and cash equivalents	(39,326)	15,921	26,699
Cash and cash equivalents at beginning of period	105,184	89,263	62,564
Cash and cash equivalents at end of period	65,858	$ 105,184	$ 89,263
Non-cash investing activities:
Net transfers from loans to other investments	$ 25,551