10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

xQUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2013

OR

oTRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from                  to              

Commission file number  000-09439

INTERNATIONAL BANCSHARES CORPORATION

(Exact name of registrant as specified in its charter)

Texas	74-2157138
(State or other jurisdiction of	(I.R.S. Employer Identification No.)
incorporation or organization)

1200 San Bernardo Avenue, Laredo, Texas 78042-1359

(Address of principal executive offices)

(Zip Code)

(956) 722-7611

(Registrant’s telephone number, including area code)

None

(Former name, former address and former fiscal year, if changed since last report)

     Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.  Yes x         No o

     Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Website, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).  Yes x         No o

     Indicate by check mark if the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company.  See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer x	Accelerated filer o
Non-accelerated filer o (Do not check if a smaller reporting company)	Smaller reporting company o

     Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes o      No x

    Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date

Class	Shares Issued and Outstanding
Common Stock, $1.00 par value	67,189,605 shares outstanding at May 6, 2013

PART I - FINANCIAL INFORMATION

Item 1. Financial Statements

INTERNATIONAL BANCSHARES CORPORATION AND SUBSIDIARIES

Consolidated Statements of Condition (Unaudited)

(Dollars in Thousands)

	March 31,			December 31,
	2013			2012
Assets
Cash and cash equivalents	$	234,959		$	283,100
Investment securities:
Held-to-maturity (Market value of $2,400 on March 31, 2013 and $2,400 on December 31, 2012)	2,400			2,400
Available-for-sale (Amortized cost of $5,102,700 on March 31, 2013 and $5,423,189 on December 31, 2012)	5,180,274			5,525,015
Total investment securities	5,182,674			5,527,415
Loans	4,826,509			4,775,004
Less allowance for probable loan losses	(62,968		)	(58,193		)
Net loans	4,763,541			4,716,811
Bank premises and equipment, net	480,828			481,287
Accrued interest receivable	28,384			31,034
Other investments	368,075			372,739
Identified intangible assets, net	6,682			7,819
Goodwill	282,532			282,532
Other assets	172,497			179,936
Total assets	$	11,520,172		$	11,882,673

1

INTERNATIONAL BANCSHARES CORPORATION AND SUBSIDIARIES

Consolidated Statements of Condition, continued (Unaudited)

(Dollars in Thousands)

	March 31,			December 31,
	2013			2012
Liabilities and Shareholders’ Equity
Liabilities:
Deposits:
Demand — non-interest bearing	$	2,612,327		$	2,465,750
Savings and interest bearing demand	2,868,564			2,867,151
Time	2,835,652			2,954,312
Total deposits	8,316,543			8,287,213
Securities sold under repurchase agreements	1,055,587			1,129,679
Other borrowed funds	387,493			749,027
Junior subordinated deferrable interest debentures	190,726			190,726
Other liabilities	134,949			90,320
Total liabilities	10,085,298			10,446,965
Commitments, Contingent Liabilities and Other Tax Matters (Note 10)
Shareholders’ equity:
Common shares of $1.00 par value. Authorized 275,000,000 shares; issued 95,725,560 shares on March 31, 2013 and 95,724,517 shares on December 31, 2012	95,726			95,725
Surplus	163,413			163,287
Retained earnings	1,384,173			1,369,543
Accumulated other comprehensive income (including $(7,234) and $(6,811) of comprehensive loss related to other-than-temporary impairment for non-credit related issues)	50,071			65,662
	1,693,383			1,694,217
Less cost of shares in treasury, 28,537,180 shares on March 31, 2013 and 28,537,180 December 31, 2012	(258,509		)	(258,509		)
Total shareholders’ equity	1,434,874			1,435,708
Total liabilities and shareholders’ equity	$	11,520,172		$	11,882,673

See accompanying notes to consolidated financial statements.

2

INTERNATIONAL BANCSHARES CORPORATION AND SUBSIDIARIES

Consolidated Statements of Income (Unaudited)

(Dollars in Thousands, except per share data)

	Three Months EndedMarch 31,
	2013		2012
Interest income:
Loans, including fees	$	63,534	$	68,323
Investment securities:
Taxable	20,519		24,512
Tax-exempt	3,036		2,861
Other interest income	21		86
Total interest income	87,110		95,782
Interest expense:
Savings deposits	1,011		1,623
Time deposits	4,445		6,485
Securities sold under repurchase agreements	7,568		10,302
Other borrowings	290		208
Junior subordinated interest deferrable debentures	1,164		2,047
Total interest expense	14,478		20,665
Net interest income	72,632		75,117
Provision for probable loan losses	7,419		5,285
Net interest income after provision for probable loan losses	65,213		69,832
Non-interest income:
Service charges on deposit accounts	23,830		22,753
Other service charges, commissions and fees
Banking	9,983		10,064
Non-banking	1,061		1,251
Investment securities transactions, net	9,601		1,172
Other investments, net	6,997		5,134
Other income	1,780		2,803
Total non-interest income	$	53,252	$	43,177

3

INTERNATIONAL BANCSHARES CORPORATION AND SUBSIDIARIES

Consolidated Statements of Income, continued (Unaudited)

(Dollars in Thousands, except per share data)

	Three Months EndedMarch 31,
	2013		2012
Non-interest expense:
Employee compensation and benefits	$	30,211	$	29,401
Occupancy	7,812		8,734
Depreciation of bank premises and equipment	6,625		6,927
Professional fees	3,723		3,370
Deposit insurance assessments	1,616		1,567
Net expense, other real estate owned	1,789		1,181
Amortization of identified intangible assets	1,137		1,137
Advertising	1,846		1,827
Early termination fee — securities sold under repurchase agreements	9,885		—
Impairment charges (Total other-than-temporary impairment charges,$968 net of $658, and $1,650, net of $1,464, included in other comprehensiveincome)	310		186
Other	15,907		13,813
Total non-interest expense	80,861		68,143
Income before income taxes	37,604		44,866
Provision for income taxes	9,535		13,179
Net income	$	28,069	$	31,687
Preferred stock dividends	—		3,343
Net income available to common shareholders	$	28,069	$	28,344
Basic earnings per common share:
Weighted average number of shares outstanding:	67,187,583		67,271,146
Net income	$	.42	$	.42
Fully diluted earnings per common share:
Weighted average number of shares outstanding:	67,279,981		67,355,427
Net income	$	.42	$	.42

See accompanying notes to consolidated financial statements.

4

INTERNATIONAL BANCSHARES CORPORATION AND SUBSIDIARIES

Consolidated Statements of Comprehensive Income (Unaudited)

(Dollars in Thousands)

	Three Months EndedMarch 31,
	2013			2012
Net income	$	28,069		$	31,687
Other comprehensive income, net of tax:
Net unrealized holding losses on securities available for sale arising during period (tax effects of $(5,143) and $(3,959))	(9,552		)	(7,352		)
Reclassification adjustment for gains on securities available for sale included in net income (tax effects of $(3,360) and $(410))	(6,241		)	(762		)
Reclassification adjustment for impairment charges on available for sale securities included in net income (tax effects of $108 and $65)	202			121
	(15,591		)	(7,993		)
Comprehensive income	$	12,478		$	23,694

See accompanying notes to consolidated financial statements.

5

INTERNATIONAL BANCSHARES CORPORATION AND SUBSIDIARIES

Consolidated Statements of Cash Flows (Unaudited)

(Dollars in Thousands)

	Three Months EndedMarch 31,
	2013			2012
Operating activities:
Net income	$	28,069		$	31,687
Adjustments to reconcile net income to net cash provided byoperating activities:
Provision for probable loan losses	7,419			5,285
Specific reserve, other real estate owned	(70		)	427
Depreciation of bank premises and equipment	6,625			6,927
(Gain) loss on sale of bank premises and equipment	(21		)	30
Gain on sale of other real estate owned	(39		)	(232		)
Accretion of investment securities discounts	(894		)	(755		)
Amortization of investment securities premiums	11,204			6,435
Investment securities transactions, net	(9,601		)	(1,172		)
Impairment charges on available-for-sale investment securities	310			186
Amortization of identified intangible assets	1,137			1,137
Stock based compensation expense	114			131
Earnings from affiliates and other investments	(4,702		)	(5,050		)
Deferred tax (benefit) expense	(2,098		)	1,091
Decrease in accrued interest receivable	2,650			2,352
Net decrease (increase) in other assets	8,926			(113		)
Net increase in other liabilities	4,404			11,629
Net cash provided by operating activities	53,433			59,995
Investing activities:
Proceeds from maturities of securities	—			200
Proceeds from sales and calls of available for sale securities	178,124			17,331
Purchases of available for sale securities	(217,214		)	(272,091		)
Principal collected on mortgage-backed securities	396,105			306,652
Net (increase) decrease in loans	(59,937		)	78,532
Purchases of other investments	(512		)	(150		)
Distributions of other investments	9,878			10,396
Purchases of bank premises and equipment	(6,166		)	(9,566		)
Proceeds from sales of other real estate owned	4,410			11,099
Proceeds from sale of bank premises and equipment	21			514
Net cash provided by investing activities	304,709			142,917

6

INTERNATIONAL BANCSHARES CORPORATION AND SUBSIDIARIES

Consolidated Statements of Cash Flows, continued (Unaudited)

(Dollars in Thousands)

	Three Months EndedMarch 31,
	2013			2012
Financing activities:
Net increase in non-interest bearing demand deposits	$	146,577		$	136,582
Net increase in savings and interest bearing demand deposits	1,413			215,514
Net (decrease) increase in time deposits	(118,660		)	19,627
Net (decrease) increase in securities sold under repurchase agreements	(74,092		)	13,805
Net decrease in other borrowed funds	(361,534		)	(296,033		)
Purchases of treasury stock	—			(558		)
Proceeds from stock transactions	13			10
Payments of dividends on preferred stock	—			(2,700		)
Net cash (used in) provided by financing activities	(406,283		)	86,247
(Decrease) increase in cash and cash equivalents	(48,141		)	289,159
Cash and cash equivalents at beginning of period	283,100			261,885
Cash and cash equivalents at end of period	$	234,959		$	551,044
Supplemental cash flow information:
Interest paid	$	15,590		$	21,493
Income taxes paid	5,000			50
Non-cash investing and financing activities:
Accrued dividends, preferred shares	$	—		$	1,350
Dividends declared, not yet paid	13,439			13,450
Net transfer from loans to other real estate owned	5,788			28,765
Purchases of available-for-sale securities not yet settled	37,545			26,195

See accompanying notes to consolidated financial statements.

7

INTERNATIONAL BANCSHARES CORPORATION AND SUBSIDIARIES

Notes to Consolidated Financial Statements

(Unaudited)

Note 1 - Basis of Presentation

The accounting and reporting policies of International Bancshares Corporation (“Corporation”) and Subsidiaries (the Corporation and Subsidiaries collectively referred to herein as the “Company”) conform to accounting principles generally accepted in the United States of America and to general practices within the banking industry.  The consolidated financial statements include the accounts of the Corporation and its wholly-owned subsidiaries, International Bank of Commerce, Laredo (“IBC”), Commerce Bank, International Bank of Commerce, Zapata, International Bank of Commerce, Brownsville and the Corporation’s wholly-owned non-bank subsidiaries, IBC Subsidiary Corporation, IBC Life Insurance Company, IBC Trading Company, IBC Capital Corporation and Premier Tierra Holdings, Inc.  All significant inter-company balances and transactions have been eliminated in consolidation.  The consolidated financial statements are unaudited, but include all adjustments, which, in the opinion of management, are necessary for a fair presentation of the results of the periods presented.  All such adjustments were of a normal and recurring nature.  It is suggested that these financial statements be read in conjunction with the financial statements and the notes thereto in the Company’s latest Annual Report on Form 10-K.  The consolidated statement of condition at December 31, 2012 has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by accounting principles generally accepted in the United States of America for complete financial statements.  Certain reclassifications have been made to make prior periods comparable.

The Company operates as one segment.  The operating information used by the Company’s chief executive officer for purposes of assessing performance and making operating decisions about the Company is the consolidated statements presented in this report.  The Company has four active operating subsidiaries, namely, the bank subsidiaries, otherwise known as International Bank of Commerce, Laredo, Commerce Bank, International Bank of Commerce, Zapata and International Bank of Commerce, Brownsville.  The Company applies the provisions of Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”), FASB ASC 280, “Segment Reporting”, in determining its reportable segments and related disclosures.

The Company has evaluated all events or transactions that occurred through the date the Company issued these financial statements. During this period, the Company did not have any material recognizable or non-recognizable subsequent events.

Note 2 — Fair Value Measurements

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.

8

The following table represents assets and liabilities reported on the consolidated balance sheets at their fair value as of March 31, 2013 by level within the fair value measurement hierarchy:

			Fair Value Measurements at Reporting Date Using
			(in thousands)
	Assets/Liabilities Measured at Fair Value		Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
	March 31, 2013		(Level 1)		(Level 2)		(Level 3)
Measured on a recurring basis:
Assets:
Available for sale securities
Residential mortgage-backed securities	$	4,923,211	$	—	$	4,892,514	$	30,697
States and political subdivisions	235,910		—		235,910		—
Other	21,153		21,153		—		—
	$	5,180,274	$	21,153	$	5,128,424	$	30,697

The following table represents assets and liabilities reported on the consolidated balance sheets at their fair value as of December 31, 2012 by level within the fair value measurement hierarchy:

			Fair Value Measurements at Reporting Date Using
			(in thousands)
	Assets/Liabilities Measured at Fair Value		Quoted Prices in Active Markets for Identical		Significant Other Observable		Significant Unobservable
	December 31, 2012		Assets (Level 1)		Inputs (Level 2)		Inputs (Level 3)
Measured on a recurring basis:
Assets:
Available for sale securities
Residential mortgage-backed securities	$	5,265,204	$	—	$	5,232,344	$	32,860
States and political subdivisions	238,675		—		238,675		—
Other	21,136		21,136		—		—
	$	5,525,015	$	21,136	$	5,471,019	$	32,860

9

Investment securities available-for-sale are classified within level 2 and level 3 of the valuation hierarchy, with the exception of certain equity investments that are classified within level 1.  For investments classified as level 2 in the fair value hierarchy, the Company obtains fair value measurements for investment securities 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.  Investment securities classified as level 3 are non-agency mortgage-backed securities.  The non-agency mortgage-backed securities held by the Company are traded in inactive markets and markets that have experienced significant decreases in volume and level of activity, as evidenced by few recent transactions, a significant decline or absence of new issuances, price quotations that are not based on comparable securities transactions and wide bid-ask spreads among other factors.  As a result of the inability to use quoted market prices to determine fair value for these securities, the Company determined that fair value, as determined by level 3 inputs in the fair value hierarchy, is more appropriate for financial reporting and more consistent with the expected performance of the investments.  For the investments classified within level 3 of the fair value hierarchy, the Company used a discounted cash flow model to determine fair value.  Inputs in the model included both historical performance and expected future performance based on information currently available.

Assumptions used in the discounted cash flow model as of March 31, 2013 and December 31, 2012, were applied separately to those portions of the bond where the underlying residential mortgage loans had been performing under original contract terms for at least the prior 24 months and those where the underlying residential mortgages had not been meeting the original contractual obligation for the same period.  Unobservable inputs included in the model are estimates on future principal prepayment rates, and default and loss severity rates.  For that portion of the bond where the underlying residential mortgage had been meeting the original contract terms for at least 24 months, the Company used the following estimates in the model: (i) a voluntary prepayment rate of 7%, (ii) a 1% default rate, (iii) a loss severity rate of 25%, and (iv) a discount rate of 13%.  The assumptions used in the model for the rest of the bond included the following estimates:  (i) a voluntary prepayment rate of 2 %, (ii) a default rate of 4.5%, (iii) a loss severity rate that started at 60% for the first year (2012)  then declines by 5% for the following five years (2013, 2014, 2015, 2016 and 2017) and remains at 25% thereafter (2018 and beyond), and (iv) a discount rate of 13%.  The estimates used in the model to determine fair value are based on observable historical data of the underlying collateral.  The model anticipates that the housing market will gradually improve and that the underlying collateral will eventually all perform in accordance with the original contract terms on the bond.  Should the number of loans in the underlying collateral that default and go into foreclosure or the severity of the losses in the underlying collateral significantly change, the results of the model would be impacted.  The Company will continue to evaluate the actual historical performance of the underlying collateral and will modify the assumptions used in the model as necessary.

The following table presents a reconciliation of activity for such mortgage-backed securities on a net basis (Dollars in thousands):

Balance at December 31, 2012	$	32,860
Principal paydowns	(1,195		)
Total unrealized losses included in:
Other comprehensive income	(658		)
Impairment realized	(310		)
Balance at March 31, 2013	$	30,697

Certain financial assets and financial liabilities are measured at fair value on a nonrecurring basis.  The instruments 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).

10

The following table represents financial instruments measured at fair value on a non-recurring basis as of March 31, 2013 by level within the fair value measurement hierarchy:

			Fair Value Measurements at Reporting Date Using
			(in thousands)
	Assets/Liabilities Measured at Fair Value		Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs		Net Provision(Credit)During
	March 31, 2013		(Level 1)		(Level 2)		(Level 3)		Period
Measured on a non-recurringbasis:
Assets:
Impaired loans	$	27,330	$	—	$	—	$	27,330	$	10,332
Other real estate owned	2,752		—		—		2,752		(70		)

The following table represents financial instruments measured at fair value on a non-recurring basis as of December 31, 2012 by level within the fair value measurement hierarchy:

			Fair Value Measurements at Reporting Date Using
			(in thousands)
	Assets/Liabilities Measured at Fair Value December 31,		Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs		NetProvisionDuring the
	2012		(Level 1)		(Level 2)		(Level 3)		Period
Measured on a non-recurringbasis:
Assets:
Impaired loans	$	11,981	$	—	$	—	$	11,981	$	295
Other real estate owned	18,749		—		—		18,749		—

11

The Company’s assets measured at fair value on a non-recurring basis are limited to impaired loans and other real estate owned.  Impaired loans are classified within level 3 of the valuation hierarchy.  The fair value of impaired loans is derived in accordance with FASB ASC 310, “Receivables”.  Impaired loans are primarily comprised of collateral-dependent commercial loans.   The fair value of impaired loans is based on the fair value of the collateral, as determined through an appraisal process.  The basis for the Company’s appraisal and appraisal review process is based on regulatory guidelines and strives to comply with all regulatory appraisal laws, regulations and the Uniform Standards of Professional Appraisal Practice.  Understanding that as the primary sources of loan repayments decline, the secondary repayment source comes into play and correctly evaluating the fair value of that secondary source, the collateral, becomes even more important.  New or updated appraisals may be obtained as warranted after evaluation of any material deterioration in the performance of the project, the conditions for the geographic area where the property is located, the property type, differences between the current property conditions and the conditions assumed in prior appraisals or evaluations, or changes in project specifications.  All appraisals and evaluations are “as is” (the property’s highest and best use) valuations based on the current conditions of the property/project at that point in time.  The determination of the fair value of the collateral is based on the net realizable value, which is the appraised value less any closing costs, when applicable.  Impaired loans are remeasured and reported at fair value through a specific valuation allowance allocation of the allowance for probable loan losses based upon the fair value of the underlying collateral.  As of March 31, 2013, the Company had $70,267,000 of impaired commercial collateral dependent loans, of which $50,579,000 had an appraisal or evaluation performed within the last twelve months.  As of December 31, 2012, the Company had $73,646,000 of impaired commercial collateral dependent loans, of which $48,856,000 had an appraisal or evaluation performed within the last twelve months.

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 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 three months ended March 31, 2013 and the twelve months ended December 31, 2012, respectively the Company recorded $61,000 and $10,450,000 in charges to the allowance for probable loan losses in connection with loans transferred to other real estate owned.  For the three months ended March 31, 2013 and twelve months ended December 31, 2012, respectively, the Company recorded $(70) and $0 in adjustments to fair value in connection with other real estate owned.

The fair value estimates, methods, and assumptions for the Company’s financial instruments at March 31, 2013 and December 31, 2012 are outlined below.

Cash and Due From Banks and Federal Funds Sold

For these short-term instruments, the carrying amount is a reasonable estimate of fair value.

Time Deposits with Banks

The carrying amounts of time deposits with banks approximate fair value.

Investment Securities Held-to-Maturity

The carrying amounts of investments held-to-maturity approximate fair value.

Investment Securities

For investment securities, which 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 6.

12

Loans

Fair values are estimated for portfolios of loans with similar financial characteristics.  Loans are segregated by type such as commercial, real estate and consumer loans as outlined by regulatory reporting guidelines.  Each category is segmented into fixed and variable interest rate terms and by performing and non-performing categories.

For variable rate performing loans, the carrying amount approximates the fair value.  For fixed rate performing loans, except residential mortgage loans, the fair value is calculated by discounting scheduled cash flows through the estimated maturity using estimated market discount rates that reflect the credit and interest rate risk inherent in the loan.  For performing residential mortgage loans, fair value is estimated by discounting contractual cash flows adjusted for prepayment estimates using discount rates based on secondary market sources or the primary origination market.  Fixed rate performing loans are within Level 3 of the fair value hierarchy.  At March 31, 2013, and December 31, 2012, the carrying amount of fixed rate performing loans was $1,175,326,000 and $1,189,585,000, respectively, and the estimated fair value was $1,122,036,000 and $1,126,228,000, 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 March 31, 2013 and December 31, 2012.  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 March 31, 2013 and December 31, 2012, the carrying amount of time deposits was $2,835,652,000 and $2,954,312,000, respectively, and the estimated fair value was $2,844,576,000 and $2,962,190,000, respectively.

Securities Sold Under Repurchase Agreements

Securities sold under repurchase agreements include both short and long-term maturities.  Due to the contractual terms of the short-term instruments, the carrying amounts approximated fair value at March 31, 2013 and December 31, 2012.  The fair value of the long-term instruments is based on established market spreads using option adjusted spread methodology.  Long-term repurchase agreements are within level 3 of the fair value hierarchy.  At March 31, 2013 and December 31, 2012, respectively, the carrying amount of long-term repurchase agreements was $730,000,000 and $800,000,000, respectively, and the estimated fair value was $842,507,000 and $932,007,000, respectively.

Junior Subordinated Deferrable Interest Debentures

The Company currently has 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 March 31, 2013 and December 31, 2012.

Other Borrowed Funds

The company currently has short and long-term borrowings issued from the Federal Home Loan Bank (“FHLB”).  Due to the contractual terms of the short-term borrowings, the carrying amounts approximated fair value at March 31, 2013 and December 31, 2012.  The fair value of the long-term borrowings is based on established market spreads for similar types of borrowings.  The long-term borrowings are included in Level 2 of the fair value hierarchy.  At March 31, 2013 and December 31, 2012, the carrying amount of the long-term FHLB borrowings was $6,493,000, and $6,527,000, respectively, and the estimated fair value was $7,011,000 and $7,073,000, respectively.

13

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 the Company’s entire holdings of a particular financial instrument.  Because no market exists for a significant portion of the Company’s 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.

Note 3— Loans

A summary of loans, by loan type at March 31, 2013 and December 31, 2012 is as follows:

	March 31,		December 31,
	2013		2012
	(Dollars in Thousands)
Commercial, financial and agricultural	$	2,657,248	$	2,525,380
Real estate — mortgage	829,088		838,467
Real estate — construction	1,085,506		1,147,669
Consumer	70,030		74,514
Foreign	184,637		188,974
Total loans	$	4,826,509	$	4,775,004

Note 4 - Allowance for Probable Loan Losses

The allowance for probable loan losses primarily consists of the aggregate loan loss allowances of the bank subsidiaries.  The allowances are established through charges to operations in the form of provisions for probable loan losses.  Loan losses or recoveries are charged or credited directly to the allowances.  The allowance for probable loan losses of each bank subsidiary is maintained at a level considered appropriate by management, based on estimated probable losses in the loan portfolio.  The allowance for probable loan losses is derived from the following elements:  (i) allowances established on specific loans, which are based on a review of the individual characteristics of each loan, including the customer’s ability to repay the loan, the underlying collateral values, and the industry in which the customer operates, (ii) allowances based on actual historical loss experience for similar types of loans in the Company’s loan portfolio, and (iii) allowances based on general economic conditions, changes in the mix of loans, company resources, border risk and credit quality indicators, among other things.  All segments of the loan portfolio continue to be impacted by the prolonged economic downturn.  Loans secured by real estate could be impacted negatively by the continued economic environment and resulting decrease in collateral values.  Consumer loans may be impacted by continued and prolonged unemployment rates.

14

The Company’s management continually reviews the allowance for loan losses of the bank subsidiaries using the amounts determined from the allowances established on specific loans, the allowance established on quantitative historical loss percentages, and the allowance based on qualitative data to establish an appropriate amount to maintain in the Company’s allowance for loan losses.  Should any of the factors considered by management in evaluating the adequacy of the allowance for probable loan losses change, the Company’s estimate of probable loan losses could also change, which could affect the level of future provisions for probable loan losses.  While the calculation of the allowance for probable loan losses utilizes management’s best judgment and all information available, the adequacy of the allowance is dependent on a variety of factors beyond the Company’s control, including, among other things, the performance of the entire loan portfolio, the economy, changes in interest rates and the view of regulatory authorities towards loan classifications.

The specific loan loss provision is determined using the following methods.  On a weekly basis, 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 the Company’s internal classified report.  Additionally, the Company’s credit department reviews the majority of the Company’s 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, the Company will determine if a loan should be placed on an internal classified report because of issues related to the analysis of the credit, credit documents, collateral and/or payment history.

A summary of the transactions in the allowance for probable loan losses by loan class is as follows:

	2013
	Domestic																		Foreign
	Commercial			Commercial real estate: other construction & land development			Commercial real estate: farmland & commercial			Commercialreal estate:multifamily			Residential: first lien			Residential:junior lien			Consumer			Foreign			Total
	(Dollars in Thousands)
Balance at December 31,	$	11,632		$	12,720		$	21,880		$	694		$	4,390		$	4,448		$	1,289		$	1,140		$	58,193
Losses charge to allowance	(2,663		)	(128		)	(60		)	—			(172		)	(255		)	(211		)	(20		)	(3,509		)
Recoveries credited to allowance	694			13			13			—			5			94			46			—			865
Net losses charged toallowance	(1,969		)	(115		)	(47		)	—			(167		)	(161		)	(165		)	(20		)	(2,644		)
Provision charged tooperations	11,263			(1,552		)	(1,182		)	(85		)	(355		)	(276		)	(304		)	(90		)	7,419
Balance at March 31,	$	20,926		$	11,053		$	20,651		$	609		$	3,868		$	4,011		$	820		$	1,030		$	62,968

15

	2012
	Domestic																		Foreign
	Commercial			Commercial real estate: other construction & land development			Commercial real estate: farmland & commercial			Commercialreal estate:multifamily			Residential: first lien			Residential:junior lien			Consumer			Foreign			Total
	(Dollars in Thousands)
Balance at December 31,	$	26,617		$	19,940		$	24,227		$	1,003		$	4,562		$	4,760		$	1,724		$	1,359		$	84,192
Losses charge toallowance	(3,424		)	(71		)	(7,994		)	—			(36		)	(312		)	(247		)	—			(12,084		)
Recoveries credited toallowance	1,244			5			31			—			2			45			61			—			1,388
Net losses charged toallowance	(2,180		)	(66		)	(7.963		)	—			(34		)	(267		)	(186		)	—			(10,696		)
Provision charged tooperations	140			(108		)	5,546			(154		)	(149		)	12			64			(66		)	5,285
Balance at March 31,	$	24,577		$	19,766		$	21,810		$	849		$	4, 379		$	4,505		$	1,602		$	1,293		$	78,781

The allowance for probable loan losses is a reserve established through a provision for probable loan losses charged to expense, which represents management’s best estimate of probable loan losses when evaluating loans (i) individually or (ii) collectively.  The allowance for probable loan losses increased 8.2% to $62,968,000 at March 31, 2013 from $58,193,000 at December 31,2012.  The change is primarily driven by the addition of a specific reserve of approximately $10,000,0000 on a previously identified impaired commercial loan that  further deteriorated during the three months ended March 31,2013, partially offset by a decrease in the general reserve due to the stability of general economic factors evaluated by management.

The table below provides additional information on the balance of loans individually or collectively evaluated for impairment and their related allowance, by loan class as of March 31, 2013 and December 31, 2012:

	March 31, 2013
	Loans individually evaluated for impairment				Loans collectively evaluated for impairment
	Recorded Investment		Allowance		RecordedInvestment		Allowance
	(Dollars in Thousands)
Domestic
Commercial	$	33,108	$	11,544	$	835,849	$	9,382
Commercial real estate: other construction & landdevelopment	26,172		823		1,059,334		10,230
Commercial real estate: farmland & commercial	11,900		2,644		1,697,537		18,007
Commercial real estate: multifamily	338		—		78,516		609
Residential: first lien	4,546		—		445,845		3,868
Residential: junior lien	1,702		—		376,995		4,011
Consumer	1,245		—		68,785		820
Foreign	462		—		184,175		1,030
Total	$	79,473	$	15,011	$	4,747,036	$	47,957

16

	December 31, 2012
	Loans individually evaluated for impairment				Loans collectively evaluated for impairment
	Recorded Investment		Allowance		RecordedInvestment		Allowance
	(Dollars in Thousands)
Domestic
Commercial	$	32,768	$	1,477	$	736,342	$	10,155
Commercial real estate: other construction & landdevelopment	28,660		539		1,119,009		12,181
Commercial real estate: farmland & commercial	13,945		2,730		1,659,377		19,150
Commercial real estate: multifamily	353		—		82,595		694
Residential: first lien	3,656		—		453,075		4,390
Residential: junior lien	1,850		—		379,886		4,448
Consumer	1,326		—		73,188		1,289
Foreign	447		—		188,527		1,140
Total	$	83,005	$	4,746	$	4,691,999	$	53,447

The table below provides additional information on loans accounted for on a non-accrual basis by loan class at March 31, 2013 and December 31, 2012:

	March 31, 2013		December 31, 2012
	(Dollars in Thousands)
Domestic
Commercial	$	32,292	$	31,929
Commercial real estate: other construction & land development	23,922		26,410
Commercial real estate: farmland & commercial	9,636		11,681
Commercial real estate: multifamily	338		353
Residential: first lien	1,702		1,175
Residential: junior lien	126		175
Consumer	42		45
Foreign	21		—
Total non-accrual loans	$	68,079	$	71,768

Impaired loans are those loans where it is probable that all amounts due according to contractual terms of the loan agreement will not be collected.  The Company has identified these loans through its normal loan review procedures.    Impaired loans are measured based on (1) the present value of expected future cash flows discounted at the loan’s effective interest rate; (2) the loan’s observable market price; or (3) the fair value of the collateral if the loan is collateral dependent.  Substantially all of the Company’s impaired loans are measured at the fair value of the collateral. In limited cases the Company may use other methods to determine the level of impairment of a loan if such loan is not collateral dependent.

17

The following tables detail key information regarding the Company’s impaired loans by loan class at March 31, 2013 and December 31, 2012:

	March 31, 2013
	Recorded Investment		Unpaid Principal Balance		Related Allowance		Average Recorded Investment		Interest Recognized
	(Dollars in Thousands)
Loans with Related Allowance
Domestic
Commercial	$	18,668	$	18,702	$	11,544	$	18,688	$	9
Commercial real estate: otherconstruction & land development	5,516		5,605		823		5,478		—
Commercial real estate: farmland &commercial	6,438		9,717		2,644		6,452		23
Total impaired loans withrelated allowance	$	30,622	$	34,024	$	15,011	$	30,618	$	32

	March 31, 2013
	Recorded Investment		Unpaid Principal Balance		Average Recorded Investment		Interest Recognized
	(Dollars in Thousands)
Loans with No Related Allowance
Domestic
Commercial	$	14,440	$	14,487	$	15,147	$	1
Commercial real estate: otherconstruction & land development	20,656		20,743		20,878		18
Commercial real estate: farmland &commercial	5,462		6,232		5,006		—
Commercial real estate: multifamily	338		338		345		—
Residential: first lien	4,546		4,595		3,840		33
Residential: junior lien	1,702		1,720		1,732		24
Consumer	1,245		1,250		1,246		—
Foreign	462		463		457		5
Total impaired loans with norelated allowance	$	48,851	$	49,828	$	48,651	$	81

	December 31, 2012
	Recorded Investment		Unpaid Principal Balance		Related Allowance		Average Recorded Investment		Interest Recognized
	(Dollars in Thousands)
Loans with Related Allowance
Domestic
Commercial	$	1,633	$	1,679	$	1,477	$	21,126	$	39
Commercial real estate: otherconstruction & land development	3,671		3,671		539		6,608		—
Commercial real estate: farmland &commercial	6,678		9,923		2,730		7,342		92
Total impaired loans withrelated allowance	$	11,982	$	15,273	$	4,746	$	35,076	$	131

18

	December 31, 2012
	Recorded Investment		Unpaid Principal Balance		Average Recorded Investment		Interest Recognized
	(Dollars in Thousands)
Loans with No Related Allowance
Domestic
Commercial	$	31,135	$	31,170	$	2,996	$	4
Commercial real estate: otherconstruction & land development	24,989		25,160		39,449		141
Commercial real estate: farmland &commercial	7,267		9,340		16,536		8
Commercial real estate: multifamily	353		353		381		—
Residential: first lien	3,656		3,984		2,876		60
Residential: junior lien	1,850		1,944		1,939		104
Consumer	1,326		1,330		1,193		—
Foreign	447		447		166		6
Total impaired loans with norelated allowance	$	71,023	$	73,728	$	65,536	$	323

A portion of the impaired loans have adequate collateral and credit enhancements not requiring a related allowance for loan loss.  The level of impaired loans is reflective of the economic weakness that has been created by the financial crisis and the subsequent economic downturn.  Management is confident the Company’s loss exposure regarding these credits will be significantly reduced due to the Company’s long-standing practices that emphasize secured lending with strong collateral positions and guarantor support.  Management is likewise confident the reserve for probable loan losses is adequate.  The Company has no direct exposure to sub-prime loans in its loan portfolio, but the sub-prime crisis has affected the credit markets on a national level, and as a result, the Company has experienced an increasing amount of impaired loans; however, management’s decision to place loans in this category does not necessarily mean that the Company will experience significant losses from these loans or significant increases in impaired loans from these levels.

Management of the Company recognizes the risks associated with these impaired loans.  However, management’s decision to place loans in this category does not necessarily mean that losses will occur. In the current environment, troubled loan management can be protracted because of the legal and process problems that delay the collection of an otherwise collectable loan.  Additionally, management believes that the collateral related to these impaired loans and/or the secondary support from guarantors mitigates the potential for losses from impaired loans.    It is also important to note that even though the economic conditions in Texas and Oklahoma are weakened, we believe these markets are improving and better positioned to recover than many other areas of the country.  Loans accounted for as “troubled debt restructuring,” which are included in impaired loans, were not significant and totaled $19,232,000 and $24,300,000 as of March 31, 2013 and December 31, 2012, respectively.

The bank subsidiaries 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 and industrial or real estate loans are generally considered by management to represent a loss, in whole or part, when an exposure beyond any collateral coverage is apparent and when no further collection of the loss portion is anticipated based on the borrower’s financial condition and general economic conditions in the borrower’s industry. Generally, unsecured consumer loans are charged-off when 90 days past due.

While management of the Company 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 allowance for probable loan losses can be made only on a subjective basis.  It is the judgment of the Company’s management that the allowance for probable loan losses at March 31, 2013 was adequate to absorb probable losses from loans in the portfolio at that date.

19

The following table presents information regarding the aging of past due loans by loan class at March 31, 2013 and December 31, 2012:

	March 31, 2013
	30 – 59Days		60 – 89Days		90Days orGreater		90 Daysor greater& stillaccruing		Total Pastdue		Current		Total Portfolio
	(Dollars in Thousands)
Domestic
Commercial	$	4,024	$	25,758	$	4,457	$	3,762	$	34,239	$	834,718	$	868,957
Commercial real estate:other construction & landdevelopment	556		14,352		30,668		7,910		45,576		1,039,930		1,085,506
Commercial real estate:farmland & commercial	6,067		2,039		7,767		4,491		15,873		1,693,564		1,709,437
Commercial real estate:multifamily	862		—		412		73		1,274		77,580		78,854
Residential: first lien	4,093		1,232		8,648		7,836		13,973		436,418		450,391
Residential: junior lien	641		112		434		372		1,187		377,510		378,697
Consumer	1,702		299		658		627		2,659		67,371		70,030
Foreign	956		49		556		535		1,561		183,076		184,637
Total past due loans	$	18,901	$	43,841	$	53,600	$	25,606	$	116,342	$	4,710,167	$	4,826,509

	December 31, 2012
	30 – 59Days		60 – 89Days		90 Days orGreater		90 Daysor greater& stillaccruing		Total Pastdue		Current		Total Portfolio
	(Dollars in Thousands)
Domestic
Commercial	$	4,393	$	471	$	3,386	$	2,689	$	8,250	$	760,860	$	769,110
Commercial real estate:other construction & landdevelopment	1,107		2,300		24,225		497		27,632		1,120,037		1,147,669
Commercial real estate:farmland & commercial	3,127		21,272		2,310		929		26,709		1,646,613		1,673,322
Commercial real estate:multifamily	685		—		353		—		1,038		81,910		82,948
Residential: first lien	4,305		2,510		10,645		9,657		17,460		439,271		456,731
Residential: junior lien	2,035		410		259		115		2,704		379,032		381,736
Consumer	1,598		404		915		882		2,917		71,597		74,514
Foreign	2,257		1,005		264		264		3,526		185,448		188,974
Total past due loans	$	19,507	$	28,372	$	42,357	$	15,033	$	90,236	$	4,684,768	$	4,775,004

20

The Company’s 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 the Company’s 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 the Company’s 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 some future loss could be sustained by the Company if such weaknesses are not corrected.  For loans that are classified as impaired, management evaluates these credits ASC 310-10, “Receivables,” and, if deemed necessary, a specific reserve is allocated to the credit.  The specific reserve allocated under ASC 310-10, is 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 the Company’s loans evaluated as impaired under ASC 310-10 are measured using the fair value of collateral method.  In limited cases, the Company may use other methods to determine the specific reserve of a loan under ASC 310-10 if such loan is not collateral dependent.

The allowance based on historical loss experience on the Company’s remaining loan portfolio, which includes the “Special Review Credits,” “Watch List - Pass Credits,” and “Watch List - Substandard Credits” is determined by segregating the remaining loan portfolio into certain categories such as commercial loans, installment loans, international loans, loan concentrations and overdrafts.  Installment loans are then further segregated by number of days past due.  A historical loss percentage, adjusted for (i) management’s evaluation of changes in lending policies and procedures, (ii) current economic conditions in the market area served by the Company, (iii) other risk factors, (iv) the effectiveness of the internal loan review function, (v) changes in loan portfolios, and (vi) the composition and concentration of credit volume is applied to each category.  Each category is then added together to determine the allowance allocated under ASC 450-20.

A summary of the loan portfolio by credit quality indicator by loan class at March 31, 2013 and December 31, 2012 is as follows:

			March 31, 2013
	Pass		Special Review		Watch List - Pass		Watch List - Substandard		Watch List - Impaired
			(Dollars in Thousands)
Domestic
Commercial	$	775,851	$	3,986	$	15,888	$	40,124	$	33,108
Commercial real estate: otherconstruction & land development	992,504		34,790		2,901		29,139		26,172
Commercial real estate: farmland &commercial	1,555,921		86,445		32,798		22,373		11,900
Commercial real estate: multifamily	78,465		—		51		—		338
Residential: first lien	439,754		517		—		5,574		4,546
Residential: junior lien	375,111		77		—		1,807		1,702
Consumer	68,785		—		—		—		1,245
Foreign	183,814		—		—		361		462
Total	$	4,470,205	$	125,815	$	51,638	$	99,378	$	79,473

21

			December 31, 2012
	Pass		Special Review		Watch List - Pass		Watch List - Substandard		Watch List - Impaired
			(Dollars in Thousands)
Domestic
Commercial	$	675,263	$	4,278	$	16,535	$	40,266	$	32,768
Commercial real estate: otherconstruction & land development	1,038,749		55,079		2,614		22,567		28,660
Commercial real estate: farmland &commercial	1,486,572		109,144		46,316		17,345		13,945
Commercial real estate: multifamily	82,542		—		53		—		353
Residential: first lien	446,218		519		—		6,338		3,656
Residential: junior lien	378,000		77		309		1,500		1,850
Consumer	73,188		—		—		—		1,326
Foreign	188,499		—		28		—		447
Total	$	4,369,031	$	169,097	$	65,855	$	88,016	$	83,005

Note 5 — Stock Options

On April 5, 2012, the Board of Directors adopted the 2012 International Bancshares Corporation Stock Option Plan (the “2012 Plan”). There are 800,000 shares available for stock option grants under the 2012 Plan. Under the 2012 Plan, both qualified incentive stock options (“ISOs”) and non-qualified stock options (“NQSOs”) may be granted. 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. As of March 31, 2013, 757,500 shares were available for future grants under the 2012 Plan.

A summary of option activity under the stock option plans for the three months ended March 31, 2013 is as follows:

	Number of options	Weighted average exercise price		Weighted average remaining contractual term (years)	Aggregate intrinsicvalue ($)
					(Dollars in Thousands)
Options outstanding at December 31, 2012	794,877	$	19.03
Plus: Options granted	—	—
Less:
Options exercised	1,043	11.54
Options expired	22,343	23.50
Options forfeited	14,275	17.15
Options outstanding at March 31, 2013	757,216	18.95		3.63	3,164
Options fully vested and exercisable atMarch 31, 2013	382,186	23.7		1.64	603

Stock-based compensation expense included in the consolidated statements of income for the three months ended March 31, 2013 and March 31, 2012 was approximately $114,000 and $131,000, respectively.  As of March 31, 2013, there was approximately $1,043,000 of total unrecognized stock-based compensation cost related to non-vested options granted under the Company plans that will be recognized over a weighted average period of 1.9 years.

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Note 6 - Investment Securities

The Company classifies debt and equity securities into one of three categories:  held-to maturity, available-for-sale, or trading.  Such securities are reassessed for appropriate classification at each reporting date.  Securities classified as “held-to-maturity” are carried at amortized cost for financial statement reporting, while securities classified as “available-for-sale” and “trading” 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 accumulated other comprehensive income (loss) until realized, or in the case of losses, when deemed other than temporary.

The amortized cost and estimated fair value by type of investment security at March 31, 2013 are as follows:

	Held to Maturity
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value		Carrying Value
	(Dollars in Thousands)
Other securities	$	2,400	$	—	$	—	$	2,400	$	2,400
Total investment securities	$	2,400	$	—	$	—	$	2,400	$	2,400

	Available for Sale
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value		Carrying Value (1)
	(Dollars in Thousands)
Residential mortgage-backedsecurities	$	4,865,035	$	85,129	$	(26,953	)	$	4,923,211	$	4,923,211
Obligations of states and politicalsubdivisions	218,090		20,162		(2,342		)	235,910		235,910
Equity securities	19,575		1,609		(31		)	21,153		21,153
Total investment securities	$	5,102,700	$	106,900	$	(29,326	)	$	5,180,274	$	5,180,274

(1)Included in the carrying value of residential mortgage-backed securities are $1,893,174 of mortgage-backed securities issued by Ginnie Mae, $2,999,340,of mortgage-backed securities issued by Fannie Mae and Freddie Mac and $30,697  issued by non-government entities

The amortized cost and estimated fair value by type of investment security at December 31, 2012 are as follows:

	Held to Maturity
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value		Carrying Value
	(Dollars in Thousands)
Other securities	$	2,400	$	—	$	—	$	2,400	$	2,400
Total investment securities	$	2,400	$	—	$	—	$	2,400	$	2,400

	Available for Sale
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value		Carrying Value (1)
	(Dollars in Thousands)
Residential mortgage-backedsecurities	$	5,186,652	$	94,585	$	(16,033	)	$	5,265,204	$	5,265,204
Obligations of states and politicalsubdivisions	216,962		23,504		(1,791		)	238,675		238,675
Equity securities	19,575		1,581		(20		)	21,136		21,136
Total investment securities	$	5,423,189	$	119,670	$	(17,844	)	$	5,525,015	$	5,525,015

(1)Included in the carrying value of residential mortgage-backed securities are $2,035,742 of mortgage-backed securities issued by Ginnie Mae, $3,196,602 of mortgage-backed securities issued by Fannie Mae and Freddie Mac and $32,860  issued by non-government entities

23

The amortized cost and estimated fair value of investment securities at March 31, 2013, 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 Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
	(Dollars in Thousands)
Due in one year or less	$	1,200	$	1,200	$	—	$	—
Due after one year through five years	1,200		1,200		—		—
Due after five years through ten years	—		—		682		775
Due after ten years	—		—		217,408		235,135
Residential mortgage-backed securities	—		—		4,865,035		4,923,211
Equity securities	—		—		19,575		21,153
Total investment securities	$	2,400	$	2,400	$	5,102,700	$	5,180,274

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, the Company believes 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 or 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 $2,200,421,000 and $2,267,420,000, respectively, at March 31, 2013.

Proceeds from the sale of securities available-for-sale were $178,124,000 for the three months ended March 31, 2013, which included $177,623,000 of mortgage-backed securities. Gross gains of $9,601,000 and gross losses of $0 were realized on the sales for the three months ended March 31, 2013.  Proceeds from the sale of securities available-for-sale were $17,331,000 for the three months ended March 31, 2012, which included $0 of mortgage-backed securities. Gross gains of $1,173,000 and gross losses of $(1,000) were realized on the sales for the three months ended March 31, 2012.

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 March 31, 2013, were as follows:

	Less than 12 Months					12 Months or More					Total
	Fair Value		UnrealizedLosses			Fair Value		UnrealizedLosses			Fair Value		UnrealizedLosses
	(Dollars in Thousands)
Available for sale:
Residential mortgage-backedsecurities	$	2,140,381	$	(15,738	)	$	30,697	$	(11,215	)	$	2,171,078	$	(26,953	)
Obligations of states andpolitical subdivisions	12,539		(442		)	10,250		(1,900		)	22,789		(2,342		)
Other equity securities	4,230		(21		)	65		(10		)	4,295		(31		)
	$	2,157,150	$	(16,201	)	$	41,012	$	(13,125	)	$	2,198,162	$	(29,326	)

24

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, 2012 were as follows:

	Less than 12 Months					12 Months or More					Total
	Fair Value		UnrealizedLosses			Fair Value		UnrealizedLosses			Fair Value		UnrealizedLosses
	(Dollars in Thousands)
Available for sale:
Residential mortgage-backedsecurities	$	738,492	$	(5,476	)	$	32,860	$	(10,557	)	$	771,352	$	(16,033	)
Obligations of states andpolitical subdivisions	5,117		(114		)	10,437		(1,677		)	15,554		(1,791		)
Equity securities	—		—			56		(20		)	56		(20		)
	$	743,609	$	(5,590	)	$	43,353	$	(12,254	)	$	786,962	$	(17,844	)

The unrealized losses on investments in residential mortgage-backed securities are primarily caused by changes in market interest rates.  Residential mortgage-backed securities are primarily securities issued by Freddie Mac, Fannie Mae and Ginnie Mae.  Investments in 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, the Company believes 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 or Freddie Mac are rated consistently as AAA rated securities.  The decrease in fair value on residential mortgage-backed securities issued by Freddie Mac, Fannie Mae and Ginnie Mae is due to market interest rates.  The Company has no intent to sell such mortgage-backed securities, and will more than likely not be required to sell such securities before a market price recovery or maturity of the securities; therefore, it is the conclusion of the Company that the investments in residential mortgage-backed securities issued by Freddie Mac, Fannie Mae and Ginnie Mae are not considered other-than-temporarily impaired.  In addition, the Company has a small investment in non-agency residential mortgage-backed securities that have strong credit backgrounds and include additional credit enhancements to protect the Company from losses arising from high foreclosure rates.  These securities have additional market volatility beyond economically induced interest rate events.  It is the conclusion of the Company that the investments in non-agency residential mortgage-backed securities are other-than-temporarily impaired due to both credit and other than credit issues.  Impairment charges of $310,000 ($201,500, after tax) and $186,000 ($121,000, after tax) were recorded for the quarters ended March 31, 2013 and 2012, respectively.  The impairment charge represents the credit related impairment on the securities.

The unrealized losses on investments in other securities are caused by fluctuations in market interest rates.  The underlying cash obligations of the securities are guaranteed by the entity underwriting the debt instrument.  It is the belief of the Company that the entity issuing the debt will honor its interest payment schedule, as well as the full debt at maturity.  The securities are purchased by the Company for their economic value.  The decrease in fair value is primarily due to market interest rates and not other factors, and because the Company has no intent to sell and will more than likely not be required to sell before a market price recovery or maturity of the securities, it is the conclusion of the Company that the investments are not considered other-than-temporarily impaired.

The following table presents a reconciliation of credit-related impairment charges on available-for-sale investments recognized in earnings for the three months ended March 31, 2013 and 2012, respectively (Dollars in Thousands):

Balance at December 31, 2012	$	10,432
Impairment charges recognized in earnings during period	310
Balance at March 31, 2013	$	10,742

Balance at December 31, 2011	$	9,393
Impairment charges recognized in earnings during period	186
Balance at March 31, 2012	$	9,579

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Note 7 — Other Borrowed Funds

Other borrowed funds include Federal Home Loan Bank borrowings, which are short-term and long-term borrowings issued by the FHLB of Dallas at the market price offered at the time of funding.  These borrowings are secured by residential mortgage-backed investment securities and a portion of the Company’s loan portfolio.  At March 31, 2013, other borrowed funds totaled $387,493,000, a decrease of 48.3% from $749,027,000 at December 31, 2012.  The decrease in other borrowed funds can be attributed to the use of funds generated from the sale of mortgage-backed securities to facilitate a re-positioning of the Company’s investment portfolio.

Note 8 — Junior Subordinated Interest Deferrable Debentures

The Company has formed seven statutory business trusts under the laws of the State of Delaware, for the purpose of issuing trust preferred securities. The seven statutory business trusts formed by the Company (the “Trusts”) have each issued Capital and Common Securities and invested the proceeds thereof in an equivalent amount of junior subordinated debentures (the “Debentures”) issued by the Company. As of March 31, 2013 and December 31, 2012, the principal amount of debentures outstanding totaled $190,726,000.

The Debentures are subordinated and junior in right of payment to all present and future senior indebtedness (as defined in the respective indentures) of the Company, and are pari passu with one another. The interest rate payable on, and the payment terms of the Debentures are the same as the distribution rate and payment terms of the respective issues of Capital and Common Securities issued by the Trusts. The Company has fully and unconditionally guaranteed the obligations of each of the Trusts with respect to the Capital and Common Securities. The Company has the right, unless an Event of Default (as defined in the Indentures) has occurred and is continuing, to defer payment of interest on the Debentures for up to twenty consecutive quarterly periods on Trusts VI, VII, VIII, IX, X, XI and XII. If interest payments on any of the Debentures are deferred, distributions on both the Capital and Common Securities related to that Debenture would also be deferred. The redemption prior to maturity of any of the Debentures may require the prior approval of the Federal Reserve and/or other regulatory bodies.

For financial reporting purposes, the Trusts are treated as investments of the Company 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 March 31, 2013 and December 31, 2012, the total $190,726,000 of the Capital Securities outstanding qualified as Tier 1 capital.

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The following table illustrates key information about each of the Capital and Common Securities and their interest rate at March 31, 2013:

	Junior Subordinated Deferrable Interest Debentures		RepricingFrequency	Interest Rate		Interest Rate Index	Maturity Date	Optional Redemption Date(1)
	(In Thousands)
Trust VI	$	25,774	Quarterly	3.74	%	LIBOR + 3.45	November 2032	February 2008
Trust VII	10,310		Quarterly	3.55	%	LIBOR + 3.25	April 2033	April 2008
Trust VIII	25,774		Quarterly	3.35	%	LIBOR + 3.05	October 2033	October 2008
Trust IX	41,238		Quarterly	1.93	%	LIBOR + 1.62	October 2036	October 2011
Trust X	34,021		Quarterly	1.95	%	LIBOR + 1.65	February 2037	February 2012
Trust XI	32,990		Quarterly	1.93	%	LIBOR + 1.62	July 2037	July 2012
Trust XII	20,619		Quarterly	1.74	%	LIBOR + 1.45	September 2037	September 2012
	$	190,726

(1)The Capital Securities may be redeemed in whole or in part on any interest payment date after the Optional Redemption Date.

Note 9 — Common Stock and Dividends

The Company had outstanding 216,000 shares of Series A cumulative perpetual preferred stock (the “Senior Preferred Stock”), issued to the US Treasury under the Company’s participation in the Troubled Asset Relief Program Capital Purchase Program (the “TARP Capital Purchase Program”).  The Company redeemed all of the Senior Preferred Stock in 2012.  In conjunction with the purchase of the Senior Preferred Stock, the US Treasury received a warrant (the “Warrant”) to purchase 1,326,238 shares of the Company’s common stock (the “Warrant Shares”) at $24.43 per share, which would represent an aggregate common stock investment in the Company on exercise of the warrant in full equal to 15% of the Senior Preferred Stock investment.  The term of the Warrant is ten years and was immediately exercisable.  The Warrant is included as a component of Tier 1 capital.  As of March 31, 2013, none of the Warrants had been exercised.

The Company paid cash dividends to the common shareholders of $.20 per share on April 19, 2013 to all holders of record on April 1, 2013.  Cash dividends of $.20 per share were paid to common shareholders on April 20, and October 15, 2012 to all holders of record on April 2 and September 28, 2012, respectively.

In April 2009, following receipt of the Treasury Department’s consent, the Board of Directors re-established a formal stock repurchase program that authorized the repurchase of up to $40 million of common stock within the following twelve months and on February 28, 2013, the Board of Directors extended the repurchase program and again authorized the repurchase of up to $40 million of common stock during the twelve month period commencing on April 9, 2013, which repurchase cap the Board is inclined to increase over time.  Stock repurchases may be made from time to time, on the open market or through private transactions.  Shares repurchased in this program will be held in treasury for reissue for various corporate purposes, including employee stock option plans.  As of May 6, 2013, a total of 7,843,293 shares had been repurchased under all programs at a cost of $237,536,000.

Note 10 - Commitments and Contingent Liabilities and Other Tax Matters

The Company is involved in various legal proceedings that are in various stages of litigation.  Some of these actions allege “lender liability” claims on a variety of theories and claim substantial actual and punitive damages.  The Company has determined, based on discussions with its 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 the consolidated financial position or results of operations of the Company.  However, many of these matters are in various stages of proceedings and further developments could cause management to revise its assessment of these matters.

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During the first quarter of 2013, the Texas State Comptroller refunded approximately $1.5 million in tax in connection with an exam of the Company’s 2008 consolidated Franchise Tax return. Additionally, the Company recorded an adjustment of $2.5 million to reflect the difference between accrued and actual taxes on the 2012 Franchise Tax return.  Both items resulted in a credit to provision for income tax expense net of federal tax expense, of approximately $2.6 million on the consolidated statement of income and reduced the Company’s effective tax rate to 25.4% for the three months ended March 31, 2013.

Note 11 — Capital Ratios

The Company had a Tier 1 capital to average total asset (leverage) ratio of 11.38% and 10.86%, risk-weighted Tier 1 capital ratio of 20.31% and 19.65% and risk-weighted total capital ratio of 21.36% and 20.60% at March 31, 2013 and December 31, 2012, respectively.  The identified intangibles and goodwill of $289,214,000 as of March 31, 2013, recorded in connection with the acquisitions made by the Company, are deducted from the sum of core capital elements when determining the capital ratios of the Company.  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 qualifies as Tier 2 capital.  As of March 31, 2013, the total of $190,726,000 of the Capital Securities outstanding qualified as Tier 1 capital.  The Company actively monitors the regulatory capital ratios to ensure that the Company’s bank subsidiaries are well capitalized under the regulatory framework.

Item 2 - Management’s Discussion and Analysis of Financial Condition and Results of Operations

The following discussion should be read in conjunction with the Company’s consolidated financial statements, and notes thereto, for the year-ended December 31, 2012, included in the Company’s 2012 Form 10-K.  Operating results for the three months ended March 31, 2013 are not necessarily indicative of the results for the year ending December 31, 2013, or any future period.

Special Cautionary Notice Regarding Forward Looking Information

Certain matters discussed in this report, excluding historical information, include forward-looking statements, within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, and are subject to the safe harbor created by these sections.  Although the Company believes such forward-looking statements are based on reasonable assumptions, no assurance can be given that every objective will be reached.  The words “estimate,” “expect,” “intend,” “believe” and “project,” as well as other words or expressions of a similar meaning are intended to identify forward-looking statements.  Readers are cautioned not to place undue reliance on forward-looking statements, which speak only as of the date of this report.  Such statements are based on current expectations, are inherently uncertain, are subject to risks and should be viewed with caution.  Actual results and experience may differ materially from the forward-looking statements as a result of many factors.

Risk factors that could cause actual results to differ materially from any results that are projected, forecasted, estimated or budgeted by the Company in forward-looking statements include, among others, the following possibilities:

·Local, regional, national and international economic business conditions and the impact they may have on the Company, the Company’s customers, and such customers’ ability to transact profitable business with the Company, including the ability of its borrowers to repay their loans according to their terms or a change in the value of the related collateral.

·Volatility and disruption in national and international financial markets.

·Government intervention in the U.S. financial system.

·The Company relies, in part, on external financing to fund the Company’s operations and the unavailability of such funds in the future could adversely impact the Company’s growth strategy and prospects.

·Changes in consumer spending, borrowings and savings habits.

·Changes in interest rates and market prices, which could reduce the Company’s net interest margins, asset valuations and expense expectations, including, without limitation, the repeal of federal prohibitions on the payment of interest on demand deposits.

·Changes in the capital markets utilized by the Company and its subsidiaries, including changes in the interest rate environment that may reduce margins.

·Changes in state and/or federal laws and regulations to which the Company and its subsidiaries, as well as their customers, competitors and potential competitors, are subject, including, without limitation, the impact of the Consumer Financial Protection Bureau as a new regulator of financial institutions, changes in the accounting, tax and regulatory treatment of trust preferred securities, as well as changes in banking, tax, securities, insurance, employment, environmental and immigration laws and regulations and the risk of litigation that may follow.

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·Changes in U.S. — Mexico trade, including, without limitation, reductions in border crossings and commerce resulting from the Homeland Security Programs called “US-VISIT,” which is derived from Section 110 of the Illegal Immigration Reform and Immigrant Responsibility Act of 1996.

·The reduction of deposits from nonresident alien individuals due to the new IRS rules requiring U.S. financial institutions to report to the IRS deposit interest payment made to nonresident alien individuals.

·The loss of senior management or operating personnel.

·Increased competition from both within and outside the banking industry.

·The timing, impact and other uncertainties of the Company’s potential future acquisitions including the Company’s ability to identify suitable potential future acquisition candidates, the success or failure in the integration of their operations and the Company’s ability to maintain its current branch network and to enter new markets successfully and capitalize on growth opportunities.

·Changes in the Company’s ability to pay dividends on its Common Stock.

·Additions to the Company’s loan loss allowance as a result of changes in local, national or international conditions which adversely affect the Company’s customers, including, without limitation, lower real estate values or environmental liability risks associated with foreclosed properties.

·Greater than expected costs or difficulties related to the development and integration of new products and lines of business.

·Increased labor costs and effects related to health care reform and other laws, regulations and legal developments impacting labor costs.

·Impairment of carrying value of goodwill could negatively impact our earnings and capital.

·Changes in the soundness of other financial institutions with which the Company interacts.

·Political instability in the United States or Mexico.

·Technological changes or system failure or breaches of our network security could subject us to increased operating costs as well as litigation and other liabilities.

·Acts of war or terrorism.

·Natural disasters.

·Reduced earnings resulting from the write down of the carrying value of securities held in our securities available-for-sale portfolio following a determination that the securities are other-than-temporarily impaired.

·The effect of changes in accounting policies and practices as may be adopted by the regulatory agencies, as well as the Public Company Accounting Oversight Board, the Financial Accounting Standards Board and other accounting standards setters.

·The costs and effects of regulatory developments, including the resolution of regulatory or other governmental inquiries and the results of regulatory examinations or reviews.

·The effect of final rules amending Regulation E that prohibit financial institutions from charging consumer fees for paying overdrafts on ATM and one-time debit card transactions, unless the consumer consents or opts-in to the overdraft service for those types of transactions, as well as the effect of any other regulatory or legal developments that limit overdraft services.

·The reduction of income and possible increase in required capital levels related to the adoption of new legislation, including, without limitation, the Dodd-Frank Regulatory Reform Act and the implementing rules and regulations, including the Federal Reserve’s rule that establishes debit card interchange fee standards and prohibits network exclusivity arrangements and routing restrictions that is negatively affecting interchange revenue from debit card transactions as well as revenue from consumer services.

·The possible increase in required capital levels related to the proposed capital rules of the federal banking agencies that address the Basel III capital standards.

·The enhanced due diligence burden imposed on banks related to the banks’ inability to rely on credit ratings under Dodd-Frank which may result in a limitation on the types of securities certain banks will be able to purchase as a result of the due diligence burden.

·The Company’s success at managing the risks involved in the foregoing items, or a failure or circumvention of the Company’s internal controls and risk management, policies and procedures.

Forward-looking statements speak only as of the date on which such statements are made.  It is not possible to foresee or identify all such factors.  The Company makes no commitment to update any forward-looking statement, or to disclose any facts, events or circumstances after the date hereof that may affect the accuracy of any forward-looking statement, unless required by law.

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Overview

The Company, which is headquartered in Laredo, Texas, with 217 facilities and more than 335 ATMs, provides banking services for commercial, consumer and international customers of South, Central and Southeast Texas and the State of Oklahoma.  The Company is one of the largest independent commercial bank holding companies headquartered in Texas.  The Company, through its bank subsidiaries, is in the business of gathering funds from various sources and investing those funds in order to earn a return.  The Company either directly or through a bank subsidiary owns two insurance agencies, a liquidating subsidiary, a broker/dealer and a fifty percent interest in an investment banking unit that owns a broker/dealer.  The Company’s primary earnings come from the spread between the interest earned on interest-bearing assets and the interest paid on interest-bearing liabilities.  In addition, the Company generates income from fees on products offered to commercial, consumer and international customers.

The Company is very active in facilitating trade along the United States border with Mexico.  The Company does a large amount of business with customers domiciled in Mexico.  Deposits from persons and entities domiciled in Mexico comprise a large and stable portion of the deposit base of the Company’s bank subsidiaries.  The Company also serves the growing Hispanic population through the Company’s facilities located throughout South, Central and Southeast Texas and the State of Oklahoma.

Expense control is an essential element in the Company’s long-term profitability.  As a result, the Company monitors the efficiency ratio, which is a measure of non-interest expense to net interest income plus non-interest income closely.  As the Company adjusts to regulatory changes related to Dodd-Frank, the Company’s efficiency ratio may suffer because the additional regulatory compliance costs are expected to increase non-interest expense.  The Company monitors this ratio over time to assess the Company’s efficiency relative to its peers.  The Company uses this measure as one factor in determining if the Company is accomplishing its long-term goals of providing superior returns to the Company’s shareholders.

Results of Operations

Summary

Consolidated Statements of Condition Information

	March 31, 2013		December 31, 2012		Percent Increase (Decrease)
	(Dollars in Thousands)
Assets	$	11,520,172	$	11,882,673	(3.1	)%
Net loans	4,763,541		4,716,811		1.0
Deposits	8,316,543		8,287,213		0.4
Other borrowed funds	387,493		749,027		(48.3	)
Junior subordinated deferrable interestdebentures	190,726		190,726		—
Shareholders’ equity	1,434,874		1,435,708		(.1	)%

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Consolidated Statements of Income Information

	Quarter Ended March 31, 2013		Quarter Ended March 31, 2012		Percent Increase (Decrease)
	(Dollars in Thousands)
Interest income	$	87,110	$	95,782	(9.1	)%
Interest expense	14,478		20,665		(29.9	)
Net interest income	72,632		75,117		(3.3	)
Provision for probable loan losses	7,419		5,285		40.4
Non-interest income	53,252		43,177		23.3
Non-interest expense	80,861		68,143		18.7
Net income available to commonshareholders	28,069		28,344		(1.0	)
Per common share:
Basic	$	.42	$	.42	—	%
Diluted		.42	.42		—

Net Income

Net income for the first quarter of 2013 decreased by 1.0% as compared to the same period in 2012. Net income for the first quarter was positively affected by the sale of available-for-sale investment securities totaling $6.2 million, net of tax.  The securities sales were a result of the Company re-positioning a portion of the investment portfolio.  Net income was negatively impacted by a charge of $6.4 million, net of tax, as a result of the Company’s lead bank subsidiary’s early termination of a portion of its long-term repurchase agreements in order to help manage its long-term funding costs.  Net income was also negatively impacted by narrowing interest margins caused by slow loan demand and declining yields in the bond markets coupled with lower levels of revenue on interchange fee income and overdraft programs due to regulatory changes, as well as the burden of increasing compliance costs arising from the Dodd-Frank Act and heightened regulatory oversight.

Net Interest Income

	Quarter Ended March 31, 2013		Quarter Ended March 31, 2012		Percent Increase (Decrease)
	(in Thousands)
Interest income:
Loans, including fees	$	63,534	$	68,323	(7.0	)%
Investment securities:
Taxable	20,519		24,512		(16.3	)
Tax-exempt	3,036		2,861		6.1
Other interest income	21		86		(75.6	)
Total interest income	87,110		95,782		(9.1	)
Interest expense:
Savings deposits	1,011		1,623		(37.7	)
Time deposits	4,445		6,485		(31.5	)
Securities sold under repurchase agreements	7,568		10,302		(26.5	)
Other borrowings	290		208		39.4
Junior subordinated interest deferrable debentures	1,164		2,047		(43.1	)
Total interest expense	14,478		20,665		(29.9	)
Net interest income	$	72,632	$	75,117	(3.3	)%

31

Net interest income is the spread between income on interest earning assets, such as loans and securities, and the interest expense on liabilities used to fund those assets, such as deposits, repurchase agreements and funds borrowed.  As part of its strategy to manage interest rate risk, the Company strives to manage both assets and liabilities so that interest sensitivities match. One method of calculating interest rate sensitivity is through gap analysis.  A gap is the difference between the amount of interest rate sensitive assets and interest rate sensitive liabilities that re-price or mature in a given time period.  Positive gaps occur when interest rate sensitive assets exceed interest rate sensitive liabilities, and negative gaps occur when interest rate sensitive liabilities exceed interest rate sensitive assets.  A positive gap position in a period of rising interest rates should have a positive effect on net interest income as assets will re-price faster than liabilities.  Conversely, net interest income should contract somewhat in a period of falling interest rates.  Management can quickly change the Company’s interest rate position at any given point in time as market conditions dictate.  Additionally, interest rate changes do not affect all categories of assets and liabilities equally or at the same time.  Analytical techniques employed by the Company to supplement gap analysis include simulation analysis to quantify interest rate risk exposure.  The gap analysis prepared by management is reviewed by the Investment Committee of the Company twice a year (see table on page 36 for the March 31, 2013 gap analysis).  Management currently believes that the Company is properly positioned for interest rate changes; however if management determines at any time that the Company is not properly positioned, it will strive to adjust the interest rate sensitive assets and liabilities in order to manage the effect of interest rate changes.

Non-Interest Income

	Quarter Ended March 31, 2013		Quarter Ended March 31, 2012		Percent Increase (Decrease)
	(in Thousands)
Service charges on deposit accounts	$	23,830	$	22,753	4.7	%
Other service charges, commissions and fees
Banking	9,983		10,064		(0.8	)
Non-banking	1,061		1,251		(15.2	)
Investment securities transactions, net	9,601		1,172		719.2
Other investments, net	6,997		5,134		36.3
Other income	1,780		2,803		(36.5	)
Total non-interest income	$	53,252	$	43,177	23.3	%

Total non-interest income increased 23.3% for the quarter ended March 31, 2013 compared the same quarter of 2012.  Investment securities transactions increased for the quarter ended March 31, 2013 primarily due to the sale of residential mortgage-backed securities as a result of the Company re-positioning of a portion of its investment portfolio.

32

Non-Interest Expense

	Quarter Ended March 31, 2013		Quarter Ended March 31, 2012		Percent Increase (Decrease)
	(in Thousands)
Employee compensation and benefits	$	30,211	$	29,401	2.8	%
Occupancy	7,812		8,734		(10.6	)
Depreciation of bank premises and equipment	6,625		6,927		(4.4	)
Professional fees	3,723		3,370		10.5
Deposit insurance assessments	1,616		1,567		3.1
Net expense, other real estate owned	1,789		1,181		51.5
Amortization of identified intangible assets	1,137		1,137		—
Advertising	1,846		1,827		1.0
Early termination fee — securities sold underrepurchase agreements	9,885		—		100.0
Impairment charges (Total other-than-temporaryimpairment charges, $968, net of $658 and$1,650, net of $1,464 included in othercomprehensive income)	310		186		66.7
Other	15,907		13,813		15.2
Total non-interest expense	$	80,861	$	68,143	18.7	%

Non-interest expense increased 18.7% for the quarter ended March 31, 2013 compared to the same period of 2012 and was negatively impacted by a charge of $9.9 million recorded by the Company’s lead bank subsidiary.  The lead bank subsidiary terminated a portion of its long-term repurchase agreements outstanding in order to help manage its long-term funding costs.

Financial Condition

Allowance for Probable Loan Losses

The allowance for probable loan losses increased 8.2% to $62,968,000 at March 31, 2013 from $58,193,000 at December 31, 2012.  The change is primarily driven by the addition of a specific reserve of approximately $10,000,000 on a previously identified impaired commercial loan that further deteriorated during the three months ended March 31, 2013, partially offset by a decrease in the general reserve due to the stability of general economic factors evaluated by management.  The provision for probable loan losses charged to expense increased 40.4% to $7,419,000 for the three months ended March 31, 2013 from $5,285,000 for the same period in 2012.  The allowance for probable loan losses was 1.3% and 1.2% of total loans at March 31, 2013 and December 31, 2012, respectively.

Investment Securities

Mortgage-backed securities are securities primarily issued by the Federal Home Loan Mortgage Corporation (“Freddie Mac”), Federal National Mortgage Association (“Fannie Mae”), and the Government National Mortgage Association (“Ginnie Mae”).  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, the Company believes 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 or Freddie Mac are rated consistently as AAA rated securities.

33

Loans

Net loans increased 1.0% to $4,763,541,000 at March 31, 2013, from $4,716,811,000 at December 31, 2012.  The relatively flat change in loans can be attributed to the lack of demand for loans that the Company is experiencing as the result of the negative economic conditions.  The mix of total impaired loans and non-accural loans at March 31, 2013 remained materially consistent as compared to the balances as of December 31, 2012.

Deposits

Deposits increased by.4% to $8,316,543,000 at March 31, 2013, from $8,287,213,000 at December 31, 2012.  The increase in deposits is the result of the increased demand for deposits and the result of the increased availability of deposits in the banking market.  Even though the Company increased its deposits, the Company is still experiencing a substantial amount of competition for deposits at higher than market rates.  As a result, the Company has attempted to maintain certain deposit relationships but has allowed certain deposits to leave as the result of aggressive pricing.

Foreign Operations

On March 31, 2013, the Company had $11,520,172,000 of consolidated assets, of which approximately $184,637,000, or 1.6%, was related to loans outstanding to borrowers domiciled in foreign countries, compared to $188,974,000, or 1.6%, at December 31, 2012.  Of the $184,637,000, 89.7% is directly or indirectly secured by U.S. assets, certificates of deposits and real estate; 9.8% is secured by foreign real estate; and .5% is unsecured.

Critical Accounting Policies

The Company has established various accounting policies which govern the application of accounting principles in the preparation of the Company’s consolidated financial statements.  The significant accounting policies are described in the notes to the consolidated financial statements.  Certain accounting policies involve significant subjective judgments and assumptions by management which have a material impact on the carrying value of certain assets and liabilities; management considers such accounting policies to be critical accounting policies.

The Company considers its Allowance for Probable Loan Losses as a policy critical to the sound operations of the bank subsidiaries.  The allowance for probable loan losses consists of the aggregate loan loss allowances of the bank subsidiaries.  The allowances are established through charges to operations in the form of provisions for probable loan losses.  Loan losses or recoveries are charged or credited directly to the allowances.  The allowance for probable loan losses of each bank subsidiary is maintained at a level considered appropriate by management, based on estimated probable losses in the loan portfolio.  The allowance is derived from the following elements:  (i) allowances established on specific loans, which are based on a review of the individual characteristics of each loan, including the customer’s ability to repay the loan, the underlying collateral values, and the industry in which the customer operates (ii) allowances based on actual historical loss experience for similar types of loans in the Company’s loan portfolio and (iii) allowances based on general economic conditions, changes in the mix of loans, Company resources, border risk and credit quality indicators, among other things.   See also discussion regarding the allowance for probable loan losses and provision for probable loan losses included in the results of operations and “Provision and Allowance for Probable Loan Losses” included in Notes 1 and 4 of the notes to Consolidated Financial Statements in the Company’s latest Annual Report on Form 10-K for further information regarding the Company’s provision and allowance for probable loan losses policy.

Liquidity and Capital Resources

The maintenance of adequate liquidity provides the Company’s bank subsidiaries with the ability to meet potential depositor withdrawals, provide for customer credit needs, maintain adequate statutory reserve levels and take full advantage of high-yield investment opportunities as they arise.  Liquidity is afforded by access to financial markets and by holding appropriate amounts of liquid assets.  The Company’s bank subsidiaries derive their liquidity largely from deposits of individuals and business entities.  Deposits from persons and entities domiciled in Mexico comprise a stable portion of the deposit base of the Company’s bank subsidiaries. Other important funding sources for the Company’s bank subsidiaries during 2013 and 2012 were borrowings from FHLB, securities sold under repurchase agreements and large certificates of deposit, requiring management to closely monitor its asset/liability mix in terms of both rate sensitivity and maturity distribution.  Primary liquidity of the Company and its subsidiaries has been maintained by means of increased investment in shorter-term securities, certificates of deposit and repurchase agreements.  As in the past, the Company will continue to monitor the volatility and cost of funds in an attempt to match maturities of rate-sensitive assets and liabilities and respond accordingly to anticipated fluctuations in interest rates over reasonable periods of time.

34

The Company maintains an adequate level of capital as a margin of safety for its depositors and shareholders.  At March 31, 2013, shareholders’ equity was $1,434,874,000 compared to $1,435,708,000 at December 31, 2012, a decrease of $834,000, or .1%.  The decrease is primarily due to a decrease in other comprehensive income and the payment of cash dividends to shareholders, offset by the retention of earnings.

The Company had a leverage ratio of 11.38% and 10.86%, risk-weighted Tier 1 capital ratio of 20.31% and 19.65% and risk-weighted total capital ratio of 21.36% and 20.60% at March 31, 2013 and December 31, 2012, respectively.  The identified intangibles and goodwill of $289,214,000 as of March 31, 2013, recorded in connection with the Company’s acquisitions, are deducted from the sum of core capital elements when determining the capital ratios of the Company.

As in the past, the Company will continue to monitor the volatility and cost of funds in an attempt to match maturities of rate-sensitive assets and liabilities, and respond accordingly to anticipate fluctuations in interest rates by adjusting the balance between sources and uses of funds as deemed appropriate.  The net-interest rate sensitivity as of March 31, 2013 is illustrated in the table entitled “Interest Rate Sensitivity.”  This information reflects the balances of assets and liabilities for which rates are subject to change.  A mix of assets and liabilities that are roughly equal in volume and re-pricing characteristics represents a matched interest rate sensitivity position.  Any excess of assets or liabilities results in an interest rate sensitivity gap.

The Company undertakes an interest rate sensitivity analysis to monitor the potential risk on future earnings resulting from the impact of possible future changes in interest rates on currently existing net asset or net liability positions.  However, this type of analysis is as of a point-in-time position, when in fact that position can quickly change as market conditions, customer needs, and management strategies change. Thus, interest rate changes do not affect all categories of asset and liabilities equally or at the same time.  As indicated in the table, the Company is liability sensitive during the early time periods and asset sensitive in the longer periods.  The Company’s Asset and Liability Committee semi-annually reviews the consolidated position along with simulation and duration models, and makes adjustments as needed to control the Company’s interest rate risk position.  The Company uses modeling of future events as a primary tool for monitoring interest rate risk.

35

Interest Rate Sensitivity

(Dollars in Thousands)

	Rate/Maturity
March 31, 2013	3 Monthsor Less			Over 3 Monthsto 1 Year			Over 1Year to 5Years		Over 5Years		Total
Rate sensitive assets
Investment securities	$	488,681		$	1,486,337		$	2,971,746	$	235,910	$	5,182,674
Loans, net of non-accruals	3,620,494			213,341			267,430		657,165		4,758,430
Total earning assets	$	4,109,175		$	1,699,678		$	3,239,176	$	893,075	$	9,941,104
Cumulative earning assets	$	4,109,175		$	5,808,853		$	9,048,029	$	9,941,104
Rate sensitive liabilities
Time deposits	$	1,159,021		$	1,365,664		$	310,529	$	438	$	2,835,652
Other interest bearing deposits	2,868,564			—			—		—		2,868,564
Securities sold under repurchaseagreements	385,123			33,054			637,410		—		1,055,587
Other borrowed funds	381,000			—			—		6,493		387,493
Junior subordinated deferrableinterest debentures	190,726			—			—		—		190,726
Total interest bearing liabilities	$	4,984,434		$	1,398,718		$	947,939	$	6,931	$	7,338,022
Cumulative sensitive liabilities	$	4,984,434		$	6,383,152		$	7,331,091	$	7,338,022
Repricing gap	(875,259		)	$	300,960		$	2,291,237	$	886,144	$	2,603,082
Cumulative repricing gap	(875,259		)	(574,299		)	1,716,938		2,603,082
Ratio of interest-sensitive assetsto liabilities	.82			1.22			3.42		128.85		1.35
Ratio of cumulative, interest-sensitive assets to liabilities	.82			.91			1.23		1.35

Item 3.  Quantitative and Qualitative Disclosures about Market Risk

During the first three months of 2013, there were no material changes in market risk exposures that affected the quantitative and qualitative disclosures regarding market risk presented under the caption “Liquidity and Capital Resources” located on pages 18 through 24 of the Company’s 2012 Annual Report as filed as an exhibit to the Company’s Form 10-K for the year ended December 31, 2012.

36

Item 4.  Controls and Procedures

Disclosure Controls and Procedures

The Company maintains disclosure controls and procedures designed to ensure that information required to be disclosed in reports filed under the Securities Exchange Act of 1934, as amended, is recorded, processed, summarized and reported within specified time periods.  As of the end of the period covered by this Quarterly Report on Form 10-Q, the Company’s principal executive officer and principal financial officer evaluated, with the participation of the Company’s management, the effectiveness of the Company’s disclosure controls and procedures (as defined in Exchange Act rules 13a-15(e) and 15d-15(e)).  Based on the evaluation, which disclosed no material weaknesses, the Company’s principal executive officer and principal financial officer concluded that the Company’s disclosure controls and procedures were effective as of the end of the period covered by this report.

Internal Control Over Financial Reporting

There were no changes in the Company’s internal control over financial reporting that occurred during the Company’s most recent fiscal quarter that have materially affected or are reasonably likely to materially affect the Company’s internal control over financial reporting.

PART II - OTHER INFORMATION

Item 1.  Legal Proceedings

The Company is involved in various legal proceedings that are in various stages of litigation.  Some of these actions allege “lender liability” claims on a variety of theories and claim substantial actual and punitive damages.  The Company has determined, based on discussions with its 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 the consolidated financial position or results of operations of the Company.  However, many of these matters are in various stages of proceedings and further developments could cause management to revise its assessment of these matters.

1A. Risk Factors

There were no material changes in the risk factors as previously disclosed in Item 1A to Part I of the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2012.

Item 2.  Unregistered Sales of Equity Securities and Use of Proceeds

From time to time, the Company’s Board of Directors has authorized stock repurchase plans.  In April 2009, the Board of Directors established a formal stock repurchase program that authorized the repurchase of up to $40 million of common stock within the following twelve months and on February 28, 2013, the Board of Directors extended the repurchase program and again authorized the repurchase of up to $40 million of common stock during the twelve month period commencing on April 9, 2013, which repurchase cap the Board is inclined to increase over time.  Stock repurchases may be made from time to time, on the open market or through private transactions.  During the first quarter, the Company’s Board of Directors adopted a Rule 10b5-1 plan and intends to adopt additional Rule 10b5-1 trading plans that will allow the Company to purchase its shares of common stock during certain trading blackout periods when the Company ordinarily would not be in the market due to trading restrictions in its internal trading policy.  Shares repurchased in this program will be held in treasury for reissue for various corporate purposes, including employee stock option plans.  As of May 6, 2013, a total of 7,843,293 shares had been repurchased under all repurchase programs at a cost of $237,536,000.  The Company is not obligated to repurchase shares under its stock purchase program or to enter into additional Rule 10b5-1 plans.  The timing, actual number and value of shares purchased will depend on many factors, including the Company’s cash flow and the liquidity and price performance of its shares of common stock.

37

Except for repurchases in connection with the administration of an employee benefit plan in the ordinary course of business and consistent with past practices, common stock repurchases are only conducted under publicly announced repurchase programs approved by the Board of Directors.  The following table includes information about common stock share repurchases for the quarter ended March 31, 2013.

	Total Number of Shares Purchased	Average Price Paid PerShare	Shares Purchased as Part of a Publicly- Announced Program	Approximate Dollar Value of Shares Available forRepurchase (1)
January 1 – January 31, 2013	—	—	—	$	38,842,000
February 1 – February 28, 2013	—	—	—	40,000,000
March 1 – March 31, 2013	—	—	—	40,000,000
	—	—	—

(1) The repurchase program was extended on February 28, 2013 and allows for the repurchase of up to an additional $40,000,000 of treasury stock through April 9, 2014.

38

Item 6.  Exhibits

The following exhibits are filed as a part of this Report:

31(a) –Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

31(b) –Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

32(a) –Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

32(b) –Certification of Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

101++ – Interactive Data File

++ Attached as Exhibit 101 to this report are the following documents formatted in XBRL (Extensible Business Reporting Language):  (i) the Condensed Consolidated Statement of Earnings for the three months ended March 31, 2013 and 2012, (ii) the Condensed Consolidated Balance Sheet as of March 31, 2013 and December 31, 2012, and (iii) the Condensed Consolidated Statement of Cash Flows for the three months ended March 31, 2013 and 2012.  Users of this data are advised pursuant to Rule 406T of Regulation S-T that this interactive data file is deemed not filed or part of a registration statement or prospectus for purposes of sections 11 or 12 of the Securities Act of 1933, is deemed not filed for purposes of section 18 of the Securities and Exchange Act of 1934, and otherwise is not subject to liability under these sections.

39

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

		INTERNATIONAL BANCSHARES CORPORATION
Date:	May 9, 2013	/s/ Dennis E. Nixon
		Dennis E. Nixon
		President
Date:	May 9, 2013	/s/ Imelda Navarro
		Imelda Navarro
		Treasurer

40

EX-31.(A)

Exhibit 31(a)

Certification of Chief Executive Officer

pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, Dennis E. Nixon, certify that:

1.I have reviewed this report on form 10-Q of International Bancshares Corporation;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of the financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: May 9, 2013
	/s/ Dennis E. Nixon
	Dennis E. Nixon
	President (Chief Executive Officer)

1

EX-31.(B)

Exhibit 31(b)

Certification of Chief Financial Officer

pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, Imelda Navarro, certify that:

1.I have reviewed this report on form 10-Q of International Bancshares Corporation;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: May 9, 2013
	/s/ Imelda Navarro
	Imelda Navarro
	Treasurer (Chief Financial Officer)

1

EX-32.(A)

Exhibit 32(a)

CERTIFICATION PURSUANT TO

18 U.S.C. 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of International Bancshares Corporation (the “Company”) on Form 10-Q for the period ended March 31, 2013, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Dennis E. Nixon, Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1)The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m(a) or 78o(d)), as applicable; and

(2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

By:	/s/ Dennis E. Nixon
	Dennis E. Nixon
	President
Date:	May 9, 2013

The foregoing certification is being furnished solely to accompany the Report pursuant to 18 U.S.C. 1350, and not being filed for purposes of Section 18 of the Securities Exchange Act, as amended, and is not to be incorporated by reference into any filing of the Company, whether on, before or after the date hereof, regardless of any general incorporation language in such filing.

A signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

1

EX-32.(B)

Exhibit 32(b)

CERTIFICATION PURSUANT TO

18 U.S.C. 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of International Bancshares Corporation (the “Company”) on Form 10-Q for the period ended March 31, 2013 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Imelda Navarro, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1)The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m(a) or 78o(d)), as applicable; and

(2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

By:	/s/ Imelda Navarro
	Imelda Navarro
	Treasurer
Date:	May 9, 2013

The foregoing certification is being furnished solely to accompany the Report pursuant to 18 U.S.C. 1350, and not being filed for purposes of Section 18 of the Securities Exchange Act, as amended, and is not to be incorporated by reference into any filing of the Company, whether on, before or after the date hereof, regardless of any general incorporation language in such filing.

A signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

1

XML

Investment Securities (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Held-to-maturity securities
Amortized Cost	$ 2,400	$ 2,400
Estimated Fair Value	2,400	2,400
Carrying Value	2,400	2,400
Available-for-sale securities
Amortized Cost	5,102,700	5,423,189
Gross Unrealized Gains	106,900	119,670
Gross Unrealized Losses	(29,326)	(17,844)
Estimated Fair Value	5,180,274	5,525,015
Carrying Value	5,180,274	5,525,015
Other securities
Held-to-maturity securities
Amortized Cost	2,400	2,400
Estimated Fair Value	2,400	2,400
Carrying Value	2,400	2,400
Residential mortgage-backed securities
Available-for-sale securities
Amortized Cost	4,865,035	5,186,652
Gross Unrealized Gains	85,129	94,585
Gross Unrealized Losses	(26,953)	(16,033)
Estimated Fair Value	4,923,211	5,265,204
Carrying Value	4,923,211	5,265,204
Mortgage-backed securities by Ginnie Mae
Available-for-sale securities
Carrying Value	1,893,174	2,035,742
Mortgage-backed securities by Fannie Mae and Freddie Mac
Available-for-sale securities
Carrying Value	2,999,340	3,196,602
Mortgage-backed securities by non-government entities
Available-for-sale securities
Carrying Value	30,697	32,860
Obligations of states and political subdivisions
Available-for-sale securities
Amortized Cost	218,090	216,962
Gross Unrealized Gains	20,162	23,504
Gross Unrealized Losses	(2,342)	(1,791)
Estimated Fair Value	235,910	238,675
Carrying Value	235,910	238,675
Equity Securities
Available-for-sale securities
Amortized Cost	19,575	19,575
Gross Unrealized Gains	1,609	1,581
Gross Unrealized Losses	(31)	(20)
Estimated Fair Value	21,153	21,136
Carrying Value	$ 21,153	$ 21,136

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Capital Ratios (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Capital Ratios
Tier 1 Capital (to Average Assets), Actual Ratio (as a percent)	11.38%	10.86%
Tier 1 Capital (to Risk Weighted Assets), Actual Ratio (as a percent)	20.31%	19.65%
Total Capital (to Risk Weighted Assets), Actual Ratio (as a percent)	21.36%	20.60%
Identified intangibles and goodwill	$ 289,214,000
Percentage of capital securities issued by trust qualifying as Tier I capital, maximum	25.00%
Capital securities issued by the trust, qualifying as Tier I capital	$ 190,726,000	$ 190,726,000

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Common Stock and Dividends (Details) (USD $)	0 Months Ended					1 Months Ended	3 Months Ended
	Apr. 19, 2013	Apr. 09, 2013	Feb. 28, 2013	Oct. 15, 2012	Apr. 20, 2012	Apr. 30, 2009	Mar. 31, 2013	May 06, 2013
Common Stock and Dividends
Series A cumulative perpetual preferred shares, outstanding							216,000
Warrants to purchase entity's common stock (in shares)							1,326,238
Warrants, exercise price (in dollars per share)							$ 24.43
Percentage of aggregate common stock investment on exercise of warrant to Senior Preferred Stock investment							15.00%
Warrants, term							10 years
Number of warrants exercised							0
Cash dividends paid to common shareholders (in dollars per share)	$ 0.20			$ 0.20	$ 0.20
Repurchase of common stock, authorized amount		$ 40,000,000	$ 40,000,000			$ 40,000,000
Period of repurchase of common stock			12 months			12 months
Cumulative number of shares repurchased under all stock repurchase programs								7,843,293
Cumulative cost of shares repurchased under all stock repurchase programs								$ 237,536,000

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Allowance for Probable Loan Losses (Details 2) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Loan loss allowances, impaired financing receivable, evaluated individually or collectively
Loans individually evaluated for impairment, Recorded Investment	$ 79,473	$ 83,005
Loans individually evaluated for impairment, Allowance	15,011	4,746
Loans collectively evaluated for impairment, Recorded Investment	4,747,036	4,691,999
Loans collectively evaluated for impairment, Allowance	47,957	53,447
Commercial
Loan loss allowances, impaired financing receivable, evaluated individually or collectively
Loans individually evaluated for impairment, Recorded Investment	33,108	32,768
Loans individually evaluated for impairment, Allowance	11,544	1,477
Loans collectively evaluated for impairment, Recorded Investment	835,849	736,342
Loans collectively evaluated for impairment, Allowance	9,382	10,155
Commercial real estate: other construction and land development
Loan loss allowances, impaired financing receivable, evaluated individually or collectively
Loans individually evaluated for impairment, Recorded Investment	26,172	28,660
Loans individually evaluated for impairment, Allowance	823	539
Loans collectively evaluated for impairment, Recorded Investment	1,059,334	1,119,009
Loans collectively evaluated for impairment, Allowance	10,230	12,181
Commercial real estate: farmland and commercial
Loan loss allowances, impaired financing receivable, evaluated individually or collectively
Loans individually evaluated for impairment, Recorded Investment	11,900	13,945
Loans individually evaluated for impairment, Allowance	2,644	2,730
Loans collectively evaluated for impairment, Recorded Investment	1,697,537	1,659,377
Loans collectively evaluated for impairment, Allowance	18,007	19,150
Commercial real estate: multifamily
Loan loss allowances, impaired financing receivable, evaluated individually or collectively
Loans individually evaluated for impairment, Recorded Investment	338	353
Loans collectively evaluated for impairment, Recorded Investment	78,516	82,595
Loans collectively evaluated for impairment, Allowance	609	694
Residential: first lien
Loan loss allowances, impaired financing receivable, evaluated individually or collectively
Loans individually evaluated for impairment, Recorded Investment	4,546	3,656
Loans collectively evaluated for impairment, Recorded Investment	445,845	453,075
Loans collectively evaluated for impairment, Allowance	3,868	4,390
Residential: junior lien
Loan loss allowances, impaired financing receivable, evaluated individually or collectively
Loans individually evaluated for impairment, Recorded Investment	1,702	1,850
Loans collectively evaluated for impairment, Recorded Investment	376,995	379,886
Loans collectively evaluated for impairment, Allowance	4,011	4,448
Consumer
Loan loss allowances, impaired financing receivable, evaluated individually or collectively
Loans individually evaluated for impairment, Recorded Investment	1,245	1,326
Loans collectively evaluated for impairment, Recorded Investment	68,785	73,188
Loans collectively evaluated for impairment, Allowance	820	1,289
Foreign
Loan loss allowances, impaired financing receivable, evaluated individually or collectively
Loans individually evaluated for impairment, Recorded Investment	462	447
Loans collectively evaluated for impairment, Recorded Investment	184,175	188,527
Loans collectively evaluated for impairment, Allowance	$ 1,030	$ 1,140

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Junior Subordinated Interest Deferrable Debentures (Tables)

3 Months Ended

Mar. 31, 2013

Junior Subordinated Interest Deferrable Debentures

Junior subordinated deferrable interest debentures, major types of business trusts

	Junior Subordinated Deferrable Interest Debentures		Repricing Frequency	Interest Rate		Interest Rate Index	Maturity Date	Optional Redemption Date(1)
	(In Thousands)
Trust VI	$	25,774	Quarterly	3.74	%	LIBOR + 3.45	November 2032	February 2008
Trust VII	10,310		Quarterly	3.55	%	LIBOR + 3.25	April 2033	April 2008
Trust VIII	25,774		Quarterly	3.35	%	LIBOR + 3.05	October 2033	October 2008
Trust IX	41,238		Quarterly	1.93	%	LIBOR + 1.62	October 2036	October 2011
Trust X	34,021		Quarterly	1.95	%	LIBOR + 1.65	February 2037	February 2012
Trust XI	32,990		Quarterly	1.93	%	LIBOR + 1.62	July 2037	July 2012
Trust XII	20,619		Quarterly	1.74	%	LIBOR + 1.45	September 2037	September 2012
	$	190,726

(1) The Capital Securities may be redeemed in whole or in part on any interest payment date after the Optional Redemption Date.

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Investment Securities (Details 4) (Available for sale investments, USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Available for sale investments
Reconciliation of credit-related impairment charges on investments recognized in earnings
Balance at the beginning	$ 10,432	$ 9,393
Impairment charges recognized in earnings during period	310	186
Balance at the end	$ 10,742	$ 9,579

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Allowance for Probable Loan Losses (Details 6) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Loan portfolio by credit quality indicator
Portfolio, total	$ 4,826,509	$ 4,775,004
Pass
Loan portfolio by credit quality indicator
Portfolio, total	4,470,205	4,369,031
Special Review
Loan portfolio by credit quality indicator
Portfolio, total	125,815	169,097
Watch List - Pass
Loan portfolio by credit quality indicator
Portfolio, total	51,638	65,855
Watch List - Substandard
Loan portfolio by credit quality indicator
Portfolio, total	99,378	88,016
Watch List - Impaired
Loan portfolio by credit quality indicator
Portfolio, total	79,473	83,005
Commercial
Loan portfolio by credit quality indicator
Portfolio, total	868,957	769,110
Commercial | Pass
Loan portfolio by credit quality indicator
Portfolio, total	775,851	675,263
Commercial | Special Review
Loan portfolio by credit quality indicator
Portfolio, total	3,986	4,278
Commercial | Watch List - Pass
Loan portfolio by credit quality indicator
Portfolio, total	15,888	16,535
Commercial | Watch List - Substandard
Loan portfolio by credit quality indicator
Portfolio, total	40,124	40,266
Commercial | Watch List - Impaired
Loan portfolio by credit quality indicator
Portfolio, total	33,108	32,768
Commercial real estate: other construction and land development
Loan portfolio by credit quality indicator
Portfolio, total	1,085,506	1,147,669
Commercial real estate: other construction and land development | Pass
Loan portfolio by credit quality indicator
Portfolio, total	992,504	1,038,749
Commercial real estate: other construction and land development | Special Review
Loan portfolio by credit quality indicator
Portfolio, total	34,790	55,079
Commercial real estate: other construction and land development | Watch List - Pass
Loan portfolio by credit quality indicator
Portfolio, total	2,901	2,614
Commercial real estate: other construction and land development | Watch List - Substandard
Loan portfolio by credit quality indicator
Portfolio, total	29,139	22,567
Commercial real estate: other construction and land development | Watch List - Impaired
Loan portfolio by credit quality indicator
Portfolio, total	26,172	28,660
Commercial real estate: farmland and commercial
Loan portfolio by credit quality indicator
Portfolio, total	1,709,437	1,673,322
Commercial real estate: farmland and commercial | Pass
Loan portfolio by credit quality indicator
Portfolio, total	1,555,921	1,486,572
Commercial real estate: farmland and commercial | Special Review
Loan portfolio by credit quality indicator
Portfolio, total	86,445	109,144
Commercial real estate: farmland and commercial | Watch List - Pass
Loan portfolio by credit quality indicator
Portfolio, total	32,798	46,316
Commercial real estate: farmland and commercial | Watch List - Substandard
Loan portfolio by credit quality indicator
Portfolio, total	22,373	17,345
Commercial real estate: farmland and commercial | Watch List - Impaired
Loan portfolio by credit quality indicator
Portfolio, total	11,900	13,945
Commercial real estate: multifamily
Loan portfolio by credit quality indicator
Portfolio, total	78,854	82,948
Commercial real estate: multifamily | Pass
Loan portfolio by credit quality indicator
Portfolio, total	78,465	82,542
Commercial real estate: multifamily | Watch List - Pass
Loan portfolio by credit quality indicator
Portfolio, total	51	53
Commercial real estate: multifamily | Watch List - Impaired
Loan portfolio by credit quality indicator
Portfolio, total	338	353
Residential: first lien
Loan portfolio by credit quality indicator
Portfolio, total	450,391	456,731
Residential: first lien | Pass
Loan portfolio by credit quality indicator
Portfolio, total	439,754	446,218
Residential: first lien | Special Review
Loan portfolio by credit quality indicator
Portfolio, total	517	519
Residential: first lien | Watch List - Substandard
Loan portfolio by credit quality indicator
Portfolio, total	5,574	6,338
Residential: first lien | Watch List - Impaired
Loan portfolio by credit quality indicator
Portfolio, total	4,546	3,656
Residential: junior lien
Loan portfolio by credit quality indicator
Portfolio, total	378,697	381,736
Residential: junior lien | Pass
Loan portfolio by credit quality indicator
Portfolio, total	375,111	378,000
Residential: junior lien | Special Review
Loan portfolio by credit quality indicator
Portfolio, total	77	77
Residential: junior lien | Watch List - Pass
Loan portfolio by credit quality indicator
Portfolio, total		309
Residential: junior lien | Watch List - Substandard
Loan portfolio by credit quality indicator
Portfolio, total	1,807	1,500
Residential: junior lien | Watch List - Impaired
Loan portfolio by credit quality indicator
Portfolio, total	1,702	1,850
Consumer
Loan portfolio by credit quality indicator
Portfolio, total	70,030	74,514
Consumer | Pass
Loan portfolio by credit quality indicator
Portfolio, total	68,785	73,188
Consumer | Watch List - Impaired
Loan portfolio by credit quality indicator
Portfolio, total	1,245	1,326
Foreign
Loan portfolio by credit quality indicator
Portfolio, total	184,637	188,974
Foreign | Pass
Loan portfolio by credit quality indicator
Portfolio, total	183,814	188,499
Foreign | Watch List - Pass
Loan portfolio by credit quality indicator
Portfolio, total		28
Foreign | Watch List - Substandard
Loan portfolio by credit quality indicator
Portfolio, total	361
Foreign | Watch List - Impaired
Loan portfolio by credit quality indicator
Portfolio, total	$ 462	$ 447

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Commitments and Contingent Liabilities and Other Tax Matters (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Commitments and Contingent Liabilities and Other Tax Matters
Deposits made against tax refund litigations	$ 1.5
Loss Contingency Income Tax Adjustments	2.5
Federal tax expense	$ 2.6
Company's effective tax rate (as a percent)	25.40%

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Basis of Presentation

3 Months Ended

Mar. 31, 2013

Basis of Presentation

Basis of Presentation

Note 1 — Basis of Presentation

The accounting and reporting policies of International Bancshares Corporation (“Corporation”) and Subsidiaries (the Corporation and Subsidiaries collectively referred to herein as the “Company”) conform to accounting principles generally accepted in the United States of America and to general practices within the banking industry.  The consolidated financial statements include the accounts of the Corporation and its wholly-owned subsidiaries, International Bank of Commerce, Laredo (“IBC”), Commerce Bank, International Bank of Commerce, Zapata, International Bank of Commerce, Brownsville and the Corporation’s wholly-owned non-bank subsidiaries, IBC Subsidiary Corporation, IBC Life Insurance Company, IBC Trading Company, IBC Capital Corporation and Premier Tierra Holdings, Inc.  All significant inter-company balances and transactions have been eliminated in consolidation.  The consolidated financial statements are unaudited, but include all adjustments, which, in the opinion of management, are necessary for a fair presentation of the results of the periods presented.  All such adjustments were of a normal and recurring nature.  It is suggested that these financial statements be read in conjunction with the financial statements and the notes thereto in the Company’s latest Annual Report on Form 10-K.  The consolidated statement of condition at December 31, 2012 has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by accounting principles generally accepted in the United States of America for complete financial statements.  Certain reclassifications have been made to make prior periods comparable.

The Company operates as one segment.  The operating information used by the Company’s chief executive officer for purposes of assessing performance and making operating decisions about the Company is the consolidated statements presented in this report.  The Company has four active operating subsidiaries, namely, the bank subsidiaries, otherwise known as International Bank of Commerce, Laredo, Commerce Bank, International Bank of Commerce, Zapata and International Bank of Commerce, Brownsville.  The Company applies the provisions of Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”), FASB ASC 280, “Segment Reporting”, in determining its reportable segments and related disclosures.

The Company has evaluated all events or transactions that occurred through the date the Company issued these financial statements. During this period, the Company did not have any material recognizable or non-recognizable subsequent events.

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Other Borrowed Funds (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Other Borrowed Funds
Other borrowed funds	$ 387,493	$ 749,027
Percentage of decrease in other borrowed funds	48.30%

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Fair Value Measurements (Details 3) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Assets:
Impaired Loans	$ 70,267,000	$ 73,646,000
Assumptions used in discounted cash flow model to determine fair value of investments classified within level 3
Charges to allowance for probable loan losses in connection with other real estate owned	61,000	10,450,000
Adjustment to fair value in connection with other real estate owned	(70,000)	0
Impaired commercial collateral dependent loans	70,267,000	73,646,000
Impaired commerical collateral dependent receivables appraisals to determine fair value within last twelve months	50,579,000	48,856,000
Significant Unobservable Inputs (Level 3) | Bond meeting the original contract terms
Assumptions used in discounted cash flow model to determine fair value of investments classified within level 3
Estimated future principal prepayment rate assumption, low end of range (as a percent)	7.00%
Estimated future principal prepayment rate assumption, discount rate (as a percent)	13.00%
Default rate assumptions (as a percent)	1.00%
Loss severity rate assumptions, first year (as a percent)	25.00%
Significant Unobservable Inputs (Level 3) | Bond not meeting the original contract terms
Assumptions used in discounted cash flow model to determine fair value of investments classified within level 3
Estimated future principal prepayment rate assumption, low end of range (as a percent)	2.00%
Estimated future principal prepayment rate assumption, discount rate (as a percent)	13.00%
Default rate assumptions (as a percent)	4.50%
Loss severity rate assumptions, first year (as a percent)	60.00%
Decrease in loss severity rates, following five years (as a percent)	5.00%
Loss severity rate, thereafter (as a percent)	25.00%
Measured on a non-recurring basis:
Assumptions used in discounted cash flow model to determine fair value of investments classified within level 3
Change in net provision (Credit), impaired loans	10,332,000	295,000
Change in net provision (Credit), other real estate owned	(70,000)
Measured on a non-recurring basis: | Assets/Liabilities Measured at Fair Value
Assets:
Impaired Loans	27,330,000	11,981,000
Non-financial assets:
Other real estate owned	2,752,000	18,749,000
Assumptions used in discounted cash flow model to determine fair value of investments classified within level 3
Impaired commercial collateral dependent loans	27,330,000	11,981,000
Measured on a non-recurring basis: | Significant Unobservable Inputs (Level 3)
Assets:
Impaired Loans	27,330,000	11,981,000
Non-financial assets:
Other real estate owned	2,752,000	18,749,000
Assumptions used in discounted cash flow model to determine fair value of investments classified within level 3
Impaired commercial collateral dependent loans	$ 27,330,000	$ 11,981,000

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Fair Value Measurements (Details 2) (Residential mortgage-backed securities, USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Residential mortgage-backed securities
Reconciliation of activity for mortgage-backed securities on a net basis
Balance at the beginning of the period	$ 32,860
Principal paydowns	(1,195)
Total unrealized losses included in:
Other comprehensive income	(658)
Impairment realized	(310)
Balance at the end of the period	$ 30,697

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Junior Subordinated Interest Deferrable Debentures (Details) (USD $)	3 Months Ended
	Mar. 31, 2013 item	Dec. 31, 2012
Junior Subordinated Interest Deferrable Debentures
Number of statutory business trusts issuing trust preferred securities	7
Junior subordinated deferrable interest debentures	$ 190,726,000	$ 190,726,000
Maximum number of consecutive quarterly period available for deferral of interest payment on Trusts VI, VII, VIII, IX, X, XI and XII	20
Percentage of capital securities issued by trust qualifying as Tier I capital, maximum	25.00%
Capital securities issued by the trust, qualifying as Tier I capital	$ 190,726,000	$ 190,726,000

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Fair Value Measurements (Details 4) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Deposits
Carrying amount of time deposits	$ 2,835,652,000	$ 2,954,312,000
Estimated fair value of time deposits	2,844,576,000	2,962,190,000
Securities Sold Under Repurchase Agreements
Carrying amount of long-term repurchase agreements	730,000,000	800,000,000
Estimated fair value of long-term repurchase agreements	842,507,000	932,007,000
Other borrowed funds
Carrying amount of the long-term FHLB borrowings	6,493,000	6,527,000
Estimated fair value of long-term FHLB borrowings	7,011,000	7,073,000
Significant Unobservable Inputs (Level 3)
Assets and liabilities reported at fair value on recurring
Estimated fair value of fixed rate performing loans	1,122,036,000	1,126,228,000
Loans
Carrying amount of fixed rate performing loans	$ 1,175,326,000	$ 1,189,585,000

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Loans (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Summary of loans, by loan type
Total loans	$ 4,826,509	$ 4,775,004
Commercial, financial and agricultural
Summary of loans, by loan type
Total loans	2,657,248	2,525,380
Real estate - mortgage
Summary of loans, by loan type
Total loans	829,088	838,467
Real estate - construction
Summary of loans, by loan type
Total loans	1,085,506	1,147,669
Consumer
Summary of loans, by loan type
Total loans	70,030	74,514
Foreign
Summary of loans, by loan type
Total loans	$ 184,637	$ 188,974

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Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Operating activities:
Net income	$ 28,069	$ 31,687
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for probable loan losses	7,419	5,285
Specific reserve, other real estate owned	(70)	427
Depreciation of bank premises and equipment	6,625	6,927
(Gain) loss on sale of bank premises and equipment	(21)	30
Gain on sale of other real estate owned	(39)	(232)
Accretion of investment securities discounts	(894)	(755)
Amortization of investment securities premiums	11,204	6,435
Investment securities transactions, net	(9,601)	(1,172)
Impairment charges on available-for-sale investment securities	310	186
Amortization of identified intangible assets	1,137	1,137
Stock based compensation expense	114	131
Earnings from affiliates and other investments	(4,702)	(5,050)
Deferred tax (benefit) expense	(2,098)	1,091
Decrease in accrued interest receivable	2,650	2,352
Net decrease (increase) in other assets	8,926	(113)
Net increase in other liabilities	4,404	11,629
Net cash provided by operating activities	53,433	59,995
Investing activities:
Proceeds from maturities of securities		200
Proceeds from sales and calls of available for sale securities	178,124	17,331
Purchases of available for sale securities	(217,214)	(272,091)
Principal collected on mortgage-backed securities	396,105	306,652
Net (increase) decrease in loans	(59,937)	78,532
Purchases of other investments	(512)	(150)
Distributions of other investments	9,878	10,396
Purchases of bank premises and equipment	(6,166)	(9,566)
Proceeds from sales of other real estate owned	4,410	11,099
Proceeds from sale of bank premises and equipment	21	514
Net cash provided by investing activities	304,709	142,917
Financing activities:
Net increase in non-interest bearing demand deposits	146,577	136,582
Net increase in savings and interest bearing demand deposits	1,413	215,514
Net (decrease) increase in time deposits	(118,660)	19,627
Net (decrease) increase in securities sold under repurchase agreements	(74,092)	13,805
Net decrease in other borrowed funds	(361,534)	(296,033)
Purchases of treasury stock		(558)
Proceeds from stock transactions	13	10
Payments of dividends on preferred stock		(2,700)
Net cash (used in) provided by financing activities	(406,283)	86,247
(Decrease) increase in cash and cash equivalents	(48,141)	289,159
Cash and cash equivalents at beginning of period	283,100	261,885
Cash and cash equivalents at end of period	234,959	551,044
Supplemental cash flow information:
Interest paid	15,590	21,493
Income taxes paid	5,000	50
Non-cash investing and financing activities:
Accrued dividends, preferred shares		1,350
Dividends declared, not yet paid	13,439	13,450
Net transfer from loans to other real estate owned	5,788	28,765
Purchases of available-for-sale securities not yet settled	$ 37,545	$ 26,195

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Allowance for Probable Loan Losses (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Allowance for probable loan losses
Balance at the beginning of the period	$ 58,193	$ 84,192
Losses charged to allowance	(3,509)	(12,084)
Recoveries credited to allowance	865	1,388
Net losses charged to allowance	(2,644)	(10,696)
Provision charged to operations	7,419	5,285
Balance at the end of the period	62,968	78,781
Increase in allowance for probable loan losses (as a percent)	8.20%
Addition of a specific reserve on a previously identified impaired loan	10,000
Commercial
Allowance for probable loan losses
Balance at the beginning of the period	11,632	26,617
Losses charged to allowance	(2,663)	(3,424)
Recoveries credited to allowance	694	1,244
Net losses charged to allowance	(1,969)	(2,180)
Provision charged to operations	11,263	140
Balance at the end of the period	20,926	24,577
Commercial real estate: other construction and land development
Allowance for probable loan losses
Balance at the beginning of the period	12,720	19,940
Losses charged to allowance	(128)	(71)
Recoveries credited to allowance	13	5
Net losses charged to allowance	(115)	(66)
Provision charged to operations	(1,552)	(108)
Balance at the end of the period	11,053	19,766
Commercial real estate: farmland and commercial
Allowance for probable loan losses
Balance at the beginning of the period	21,880	24,227
Losses charged to allowance	(60)	(7,994)
Recoveries credited to allowance	13	31
Net losses charged to allowance	(47)	(7,963)
Provision charged to operations	(1,182)	5,546
Balance at the end of the period	20,651	21,810
Commercial real estate: multifamily
Allowance for probable loan losses
Balance at the beginning of the period	694	1,003
Provision charged to operations	(85)	(154)
Balance at the end of the period	609	849
Residential: first lien
Allowance for probable loan losses
Balance at the beginning of the period	4,390	4,562
Losses charged to allowance	(172)	(36)
Recoveries credited to allowance	5	2
Net losses charged to allowance	(167)	(34)
Provision charged to operations	(355)	(149)
Balance at the end of the period	3,868	4,379
Residential: junior lien
Allowance for probable loan losses
Balance at the beginning of the period	4,448	4,760
Losses charged to allowance	(255)	(312)
Recoveries credited to allowance	94	45
Net losses charged to allowance	(161)	(267)
Provision charged to operations	(276)	12
Balance at the end of the period	4,011	4,505
Consumer
Allowance for probable loan losses
Balance at the beginning of the period	1,289	1,724
Losses charged to allowance	(211)	(247)
Recoveries credited to allowance	46	61
Net losses charged to allowance	(165)	(186)
Provision charged to operations	(304)	64
Balance at the end of the period	820	1,602
Foreign
Allowance for probable loan losses
Balance at the beginning of the period	1,140	1,359
Losses charged to allowance	(20)
Net losses charged to allowance	(20)
Provision charged to operations	(90)	(66)
Balance at the end of the period	$ 1,030	$ 1,293

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Investment Securities (Details 2) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Held-to-maturity debt securities amortized cost disclosures
Due in one year or less, held-to-maturity debt securities amortized cost	$ 1,200,000
Due after one year through five years, held-to-maturity debt securities amortized cost	1,200,000
Amortized cost, held-to-maturity debt securities	2,400,000
Held-to-maturity debt securities, Estimated fair value disclosures
Due in one year or less, held-to-maturity debt securities, Estimated fair value	1,200,000
Due after one year through five years, held-to-maturity debt securities, Estimated fair value	1,200,000
Estimated fair value, held-to-maturity debt securities	2,400,000
Available-for-sale debt securities amortized cost disclosures
Due after five years through ten years, available-for-sale debt securities amortized cost	682,000
Due after ten years, available-for-sale debt securities amortized cost	217,408,000
Residential mortgage-backed securities, amortized cost	4,865,035,000
Equity securities, amortized cost	19,575,000
Amortized cost, Available for sale securities	5,102,700,000		5,423,189,000
Available for sale debt securities, Estimated Fair Value Disclosures
Due after five years through ten years, available-for-sale debt securities, Estimated Fair Value	775,000
Due after ten years, available-for-sale debt securities, Estimated Fair Value	235,135,000
Residential mortgage-backed securities, Estimated Fair Value	4,923,211,000
Equity securities, Estimated Fair Value	21,153,000
Estimated fair value, Available for sale securities	5,180,274,000		5,525,015,000
Amortized cost of available for sale investment securities pledged	2,200,421,000
Fair value of available for sale investment securities pledged	2,267,420,000
Proceeds from sales and calls of available for sale securities	178,124,000	17,331,000
Proceeds from sales of mortgage-backed securities	177,623,000	0
Gross gains realized on sales	9,601,000	1,173,000
Gross losses realized on sales	0	(1,000)
Impairment charges on available-for-sale investment securities	310,000	186,000
Impairment charges on available-for-sale investment securities, after tax	$ 201,500	$ 121,000

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Consolidated Statements of Condition (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Assets
Cash and cash equivalents	$ 234,959	$ 283,100
Investment securities:
Held-to-maturity (Market value of $2,400 on March 31, 2013 and $2,400 on December 31, 2012)	2,400	2,400
Available-for-sale (Amortized cost of $5,102,700 on March 31, 2013 and $5,423,189 on December 31, 2012)	5,180,274	5,525,015
Total investment securities	5,182,674	5,527,415
Loans	4,826,509	4,775,004
Less allowance for probable loan losses	(62,968)	(58,193)
Net loans	4,763,541	4,716,811
Bank premises and equipment, net	480,828	481,287
Accrued interest receivable	28,384	31,034
Other investments	368,075	372,739
Identified intangible assets, net	6,682	7,819
Goodwill	282,532	282,532
Other assets	172,497	179,936
Total assets	11,520,172	11,882,673
Deposits:
Demand - non-interest bearing	2,612,327	2,465,750
Savings and interest bearing demand	2,868,564	2,867,151
Time	2,835,652	2,954,312
Total deposits	8,316,543	8,287,213
Securities sold under repurchase agreements	1,055,587	1,129,679
Other borrowed funds	387,493	749,027
Junior subordinated deferrable interest debentures	190,726	190,726
Other liabilities	134,949	90,320
Total liabilities	10,085,298	10,446,965
Commitments, Contingent Liabilities and Other Tax Matters (Note 10)
Shareholders' equity:
Common shares of $1.00 par value. Authorized 275,000,000 shares; issued 95,725,560 shares on March 31, 2013 and 95,724,517 shares on December 31, 2012	95,726	95,725
Surplus	163,413	163,287
Retained earnings	1,384,173	1,369,543
Accumulated other comprehensive income (including $(7,234) and $(6,811) of comprehensive loss related to other-than- temporary impairment for non-credit related issues)	50,071	65,662
Total shareholders' equity before treasury stock	1,693,383	1,694,217
Less cost of shares in treasury, 28,537,180 shares on March 31, 2013 and 28,537,180 December 31, 2012	(258,509)	(258,509)
Total shareholders' equity	1,434,874	1,435,708
Total liabilities and shareholders' equity	$ 11,520,172	$ 11,882,673

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Junior Subordinated Interest Deferrable Debentures (Details 2) (USD $) In Thousands, unless otherwise specified			3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2013 Trust VI	Mar. 31, 2013 Trust VII	Mar. 31, 2013 Trust VIII	Mar. 31, 2013 Trust IX	Mar. 31, 2013 Trust X	Mar. 31, 2013 Trust XI	Mar. 31, 2013 Trust XII
Junior subordinated deferrable interest debentures, major types of business trusts
Junior subordinated deferrable interest debentures	$ 190,726	$ 190,726	$ 25,774	$ 10,310	$ 25,774	$ 41,238	$ 34,021	$ 32,990	$ 20,619
Interest rate (as a percent)			3.74%	3.55%	3.35%	1.93%	1.95%	1.93%	1.74%
Interest rate index			LIBOR	LIBOR	LIBOR	LIBOR	LIBOR	LIBOR	LIBOR
Spread on interest rate index (as a percent)			3.45%	3.25%	3.05%	1.62%	1.65%	1.62%	1.45%

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Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Consolidated Statements of Comprehensive Income
Net income	$ 28,069	$ 31,687
Other comprehensive income, net of tax:
Net unrealized holding losses on securities available for sale arising during period (tax effects of $(5,143) and $(3,959))	(9,552)	(7,352)
Reclassification adjustment for gains on securities available for sale included in net income (tax effects of $(3,360) and $(410))	(6,241)	(762)
Reclassification adjustment for impairment charges on available for sale securities included in net income (tax effects of $108 and $65)	202	121
Other comprehensive income, net of tax	(15,591)	(7,993)
Comprehensive income	$ 12,478	$ 23,694

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Allowance for Probable Loan Losses (Details 4) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Interest income recognized:
Loans accounted for as troubled debt restructuring	$ 19,232,000	$ 24,300,000
Period of charge off for past due unsecured commercial loans	90 days
Class of financing receivable
Recorded investment:
Total impaired loans with related allowance	30,622,000	11,982,000
Total impaired loans with no related allowance	48,851,000	71,023,000
Unpaid principal balance:
Total impaired loans with an allowance recorded	34,024,000	15,273,000
Total impaired loans with no related allowance recorded	49,828,000	73,728,000
Related Allowance	15,011,000	4,746,000
Average recorded investment:
Total impaired loans with an allowance recorded	30,618,000	35,076,000
Total impaired loans with no related allowance recorded	48,651,000	65,536,000
Interest income recognized:
Total impaired loans with an allowance recorded	32,000	131,000
Total impaired loans with no related allowance recorded	81,000	323,000
Commercial | Class of financing receivable
Recorded investment:
Total impaired loans with related allowance	18,668,000	1,633,000
Total impaired loans with no related allowance	14,440,000	31,135,000
Unpaid principal balance:
Total impaired loans with an allowance recorded	18,702,000	1,679,000
Total impaired loans with no related allowance recorded	14,487,000	31,170,000
Related Allowance	11,544,000	1,477,000
Average recorded investment:
Total impaired loans with an allowance recorded	18,688,000	21,126,000
Total impaired loans with no related allowance recorded	15,147,000	2,996,000
Interest income recognized:
Total impaired loans with an allowance recorded	9,000	39,000
Total impaired loans with no related allowance recorded	1,000	4,000
Commercial real estate: other construction and land development | Class of financing receivable
Recorded investment:
Total impaired loans with related allowance	5,516,000	3,671,000
Total impaired loans with no related allowance	20,656,000	24,989,000
Unpaid principal balance:
Total impaired loans with an allowance recorded	5,605,000	3,671,000
Total impaired loans with no related allowance recorded	20,743,000	25,160,000
Related Allowance	823,000	539,000
Average recorded investment:
Total impaired loans with an allowance recorded	5,478,000	6,608,000
Total impaired loans with no related allowance recorded	20,878,000	39,449,000
Interest income recognized:
Total impaired loans with no related allowance recorded	18,000	141,000
Commercial real estate: farmland and commercial | Class of financing receivable
Recorded investment:
Total impaired loans with related allowance	6,438,000	6,678,000
Total impaired loans with no related allowance	5,462,000	7,267,000
Unpaid principal balance:
Total impaired loans with an allowance recorded	9,717,000	9,923,000
Total impaired loans with no related allowance recorded	6,232,000	9,340,000
Related Allowance	2,644,000	2,730,000
Average recorded investment:
Total impaired loans with an allowance recorded	6,452,000	7,342,000
Total impaired loans with no related allowance recorded	5,006,000	16,536,000
Interest income recognized:
Total impaired loans with an allowance recorded	23,000	92,000
Total impaired loans with no related allowance recorded		8,000
Commercial real estate: multifamily | Class of financing receivable
Recorded investment:
Total impaired loans with no related allowance	338,000	353,000
Unpaid principal balance:
Total impaired loans with no related allowance recorded	338,000	353,000
Average recorded investment:
Total impaired loans with no related allowance recorded	345,000	381,000
Residential: first lien | Class of financing receivable
Recorded investment:
Total impaired loans with no related allowance	4,546,000	3,656,000
Unpaid principal balance:
Total impaired loans with no related allowance recorded	4,595,000	3,984,000
Average recorded investment:
Total impaired loans with no related allowance recorded	3,840,000	2,876,000
Interest income recognized:
Total impaired loans with no related allowance recorded	33,000	60,000
Residential: junior lien | Class of financing receivable
Recorded investment:
Total impaired loans with no related allowance	1,702,000	1,850,000
Unpaid principal balance:
Total impaired loans with no related allowance recorded	1,720,000	1,944,000
Average recorded investment:
Total impaired loans with no related allowance recorded	1,732,000	1,939,000
Interest income recognized:
Total impaired loans with no related allowance recorded	24,000	104,000
Consumer | Class of financing receivable
Recorded investment:
Total impaired loans with no related allowance	1,245,000	1,326,000
Unpaid principal balance:
Total impaired loans with no related allowance recorded	1,250,000	1,330,000
Average recorded investment:
Total impaired loans with no related allowance recorded	1,246,000	1,193,000
Foreign | Class of financing receivable
Recorded investment:
Total impaired loans with no related allowance	462,000	447,000
Unpaid principal balance:
Total impaired loans with no related allowance recorded	463,000	447,000
Average recorded investment:
Total impaired loans with no related allowance recorded	457,000	166,000
Interest income recognized:
Total impaired loans with no related allowance recorded	$ 5,000	$ 6,000

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Allowance for Probable Loan Losses (Tables)

3 Months Ended

Mar. 31, 2013

Allowance for Probable Loan Losses

Summary of the transactions in the allowance for probable loan losses, by loan class

	2013
	Domestic																		Foreign
	Commercial			Commercial real estate: other construction & land development			Commercial real estate: farmland & commercial			Commercial real estate: multifamily			Residential: first lien			Residential: junior lien			Consumer			Foreign			Total
	(Dollars in Thousands)
Balance at December 31,	$	11,632		$	12,720		$	21,880		$	694		$	4,390		$	4,448		$	1,289		$	1,140		$	58,193
Losses charge to allowance	(2,663		)	(128		)	(60		)	—			(172		)	(255		)	(211		)	(20		)	(3,509		)
Recoveries credited to allowance	694			13			13			—			5			94			46			—			865
Net losses charged to allowance	(1,969		)	(115		)	(47		)	—			(167		)	(161		)	(165		)	(20		)	(2,644		)
Provision charged to operations	11,263			(1,552		)	(1,182		)	(85		)	(355		)	(276		)	(304		)	(90		)	7,419
Balance at March 31,	$	20,926		$	11,053		$	20,651		$	609		$	3,868		$	4,011		$	820		$	1,030		$	62,968

	2012
	Domestic																		Foreign
	Commercial			Commercial real estate: other construction & land development			Commercial real estate: farmland & commercial			Commercial real estate: multifamily			Residential: first lien			Residential: junior lien			Consumer			Foreign			Total
	(Dollars in Thousands)
Balance at December 31,	$	26,617		$	19,940		$	24,227		$	1,003		$	4,562		$	4,760		$	1,724		$	1,359		$	84,192
Losses charge to allowance	(3,424		)	(71		)	(7,994		)	—			(36		)	(312		)	(247		)	—			(12,084		)
Recoveries credited to allowance	1,244			5			31			—			2			45			61			—			1,388
Net losses charged to allowance	(2,180		)	(66		)	(7.963		)	—			(34		)	(267		)	(186		)	—			(10,696		)
Provision charged to operations	140			(108		)	5,546			(154		)	(149		)	12			64			(66		)	5,285
Balance at March 31,	$	24,577		$	19,766		$	21,810		$	849		$	4, 379		$	4,505		$	1,602		$	1,293		$	78,781

Loans individually or collectively evaluated for impairment and related allowance, by loan class

	March 31, 2013
	Loans individually evaluated for impairment				Loans collectively evaluated for impairment
	Recorded Investment		Allowance		Recorded Investment		Allowance
	(Dollars in Thousands)
Domestic
Commercial	$	33,108	$	11,544	$	835,849	$	9,382
Commercial real estate: other construction & land development	26,172		823		1,059,334		10,230
Commercial real estate: farmland & commercial	11,900		2,644		1,697,537		18,007
Commercial real estate: multifamily	338		—		78,516		609
Residential: first lien	4,546		—		445,845		3,868
Residential: junior lien	1,702		—		376,995		4,011
Consumer	1,245		—		68,785		820
Foreign	462		—		184,175		1,030
Total	$	79,473	$	15,011	$	4,747,036	$	47,957

	December 31, 2012
	Loans individually evaluated for impairment				Loans collectively evaluated for impairment
	Recorded Investment		Allowance		Recorded Investment		Allowance
	(Dollars in Thousands)
Domestic
Commercial	$	32,768	$	1,477	$	736,342	$	10,155
Commercial real estate: other construction & land development	28,660		539		1,119,009		12,181
Commercial real estate: farmland & commercial	13,945		2,730		1,659,377		19,150
Commercial real estate: multifamily	353		—		82,595		694
Residential: first lien	3,656		—		453,075		4,390
Residential: junior lien	1,850		—		379,886		4,448
Consumer	1,326		—		73,188		1,289
Foreign	447		—		188,527		1,140
Total	$	83,005	$	4,746	$	4,691,999	$	53,447

Loans accounted on non-accrual basis, by loan class

	March 31, 2013		December 31, 2012
	(Dollars in Thousands)
Domestic
Commercial	$	32,292	$	31,929
Commercial real estate: other construction & land development	23,922		26,410
Commercial real estate: farmland & commercial	9,636		11,681
Commercial real estate: multifamily	338		353
Residential: first lien	1,702		1,175
Residential: junior lien	126		175
Consumer	42		45
Foreign	21		—
Total non-accrual loans	$	68,079	$	71,768

Impaired loans, by loan class

	March 31, 2013
	Recorded Investment		Unpaid Principal Balance		Related Allowance		Average Recorded Investment		Interest Recognized
	(Dollars in Thousands)
Loans with Related Allowance
Domestic
Commercial	$	18,668	$	18,702	$	11,544	$	18,688	$	9
Commercial real estate: other construction & land development	5,516		5,605		823		5,478		—
Commercial real estate: farmland & commercial	6,438		9,717		2,644		6,452		23
Total impaired loans with related allowance	$	30,622	$	34,024	$	15,011	$	30,618	$	32

	March 31, 2013
	Recorded Investment		Unpaid Principal Balance		Average Recorded Investment		Interest Recognized
	(Dollars in Thousands)
Loans with No Related Allowance
Domestic
Commercial	$	14,440	$	14,487	$	15,147	$	1
Commercial real estate: other construction & land development	20,656		20,743		20,878		18
Commercial real estate: farmland & commercial	5,462		6,232		5,006		—
Commercial real estate: multifamily	338		338		345		—
Residential: first lien	4,546		4,595		3,840		33
Residential: junior lien	1,702		1,720		1,732		24
Consumer	1,245		1,250		1,246		—
Foreign	462		463		457		5
Total impaired loans with no related allowance	$	48,851	$	49,828	$	48,651	$	81

	December 31, 2012
	Recorded Investment		Unpaid Principal Balance		Related Allowance		Average Recorded Investment		Interest Recognized
	(Dollars in Thousands)
Loans with Related Allowance
Domestic
Commercial	$	1,633	$	1,679	$	1,477	$	21,126	$	39
Commercial real estate: other construction & land development	3,671		3,671		539		6,608		—
Commercial real estate: farmland & commercial	6,678		9,923		2,730		7,342		92
Total impaired loans with related allowance	$	11,982	$	15,273	$	4,746	$	35,076	$	131

	December 31, 2012
	Recorded Investment		Unpaid Principal Balance		Average Recorded Investment		Interest Recognized
	(Dollars in Thousands)
Loans with No Related Allowance
Domestic
Commercial	$	31,135	$	31,170	$	2,996	$	4
Commercial real estate: other construction & land development	24,989		25,160		39,449		141
Commercial real estate: farmland & commercial	7,267		9,340		16,536		8
Commercial real estate: multifamily	353		353		381		—
Residential: first lien	3,656		3,984		2,876		60
Residential: junior lien	1,850		1,944		1,939		104
Consumer	1,326		1,330		1,193		—
Foreign	447		447		166		6
Total impaired loans with no related allowance	$	71,023	$	73,728	$	65,536	$	323

Information regarding the aging of past due loans, by loan class

	March 31, 2013
	30 – 59 Days		60 – 89 Days		90 Days or Greater		90 Days or greater & still accruing		Total Past due		Current		Total Portfolio
	(Dollars in Thousands)
Domestic
Commercial	$	4,024	$	25,758	$	4,457	$	3,762	$	34,239	$	834,718	$	868,957
Commercial real estate: other construction & land development	556		14,352		30,668		7,910		45,576		1,039,930		1,085,506
Commercial real estate: farmland & commercial	6,067		2,039		7,767		4,491		15,873		1,693,564		1,709,437
Commercial real estate: multifamily	862		—		412		73		1,274		77,580		78,854
Residential: first lien	4,093		1,232		8,648		7,836		13,973		436,418		450,391
Residential: junior lien	641		112		434		372		1,187		377,510		378,697
Consumer	1,702		299		658		627		2,659		67,371		70,030
Foreign	956		49		556		535		1,561		183,076		184,637
Total past due loans	$	18,901	$	43,841	$	53,600	$	25,606	$	116,342	$	4,710,167	$	4,826,509

	December 31, 2012
	30 – 59 Days		60 – 89 Days		90 Days or Greater		90 Days or greater & still accruing		Total Past due		Current		Total Portfolio
	(Dollars in Thousands)
Domestic
Commercial	$	4,393	$	471	$	3,386	$	2,689	$	8,250	$	760,860	$	769,110
Commercial real estate: other construction & land development	1,107		2,300		24,225		497		27,632		1,120,037		1,147,669
Commercial real estate: farmland & commercial	3,127		21,272		2,310		929		26,709		1,646,613		1,673,322
Commercial real estate: multifamily	685		—		353		—		1,038		81,910		82,948
Residential: first lien	4,305		2,510		10,645		9,657		17,460		439,271		456,731
Residential: junior lien	2,035		410		259		115		2,704		379,032		381,736
Consumer	1,598		404		915		882		2,917		71,597		74,514
Foreign	2,257		1,005		264		264		3,526		185,448		188,974
Total past due loans	$	19,507	$	28,372	$	42,357	$	15,033	$	90,236	$	4,684,768	$	4,775,004

Summary of the loan portfolio by credit quality indicator, by loan class

			March 31, 2013
	Pass		Special Review		Watch List - Pass		Watch List - Substandard		Watch List - Impaired
			(Dollars in Thousands)
Domestic
Commercial	$	775,851	$	3,986	$	15,888	$	40,124	$	33,108
Commercial real estate: other construction & land development	992,504		34,790		2,901		29,139		26,172
Commercial real estate: farmland & commercial	1,555,921		86,445		32,798		22,373		11,900
Commercial real estate: multifamily	78,465		—		51		—		338
Residential: first lien	439,754		517		—		5,574		4,546
Residential: junior lien	375,111		77		—		1,807		1,702
Consumer	68,785		—		—		—		1,245
Foreign	183,814		—		—		361		462
Total	$	4,470,205	$	125,815	$	51,638	$	99,378	$	79,473

			December 31, 2012
	Pass		Special Review		Watch List - Pass		Watch List - Substandard		Watch List - Impaired
			(Dollars in Thousands)
Domestic
Commercial	$	675,263	$	4,278	$	16,535	$	40,266	$	32,768
Commercial real estate: other construction & land development	1,038,749		55,079		2,614		22,567		28,660
Commercial real estate: farmland & commercial	1,486,572		109,144		46,316		17,345		13,945
Commercial real estate: multifamily	82,542		—		53		—		353
Residential: first lien	446,218		519		—		6,338		3,656
Residential: junior lien	378,000		77		309		1,500		1,850
Consumer	73,188		—		—		—		1,326
Foreign	188,499		—		28		—		447
Total	$	4,369,031	$	169,097	$	65,855	$	88,016	$	83,005

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Allowance for Probable Loan Losses (Details 5) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Financing receivable recorded investment
Past due 30-59 days	$ 18,901	$ 19,507
Past due 60-89 days	43,841	28,372
Past due 90 days or greater	53,600	42,357
Past due 90 days or greater and still accruing	25,606	15,033
Past due, total	116,342	90,236
Loans, current	4,710,167	4,684,768
Total loans	4,826,509	4,775,004
Commercial
Financing receivable recorded investment
Past due 30-59 days	4,024	4,393
Past due 60-89 days	25,758	471
Past due 90 days or greater	4,457	3,386
Past due 90 days or greater and still accruing	3,762	2,689
Past due, total	34,239	8,250
Loans, current	834,718	760,860
Total loans	868,957	769,110
Commercial real estate: other construction and land development
Financing receivable recorded investment
Past due 30-59 days	556	1,107
Past due 60-89 days	14,352	2,300
Past due 90 days or greater	30,668	24,225
Past due 90 days or greater and still accruing	7,910	497
Past due, total	45,576	27,632
Loans, current	1,039,930	1,120,037
Total loans	1,085,506	1,147,669
Commercial real estate: farmland and commercial
Financing receivable recorded investment
Past due 30-59 days	6,067	3,127
Past due 60-89 days	2,039	21,272
Past due 90 days or greater	7,767	2,310
Past due 90 days or greater and still accruing	4,491	929
Past due, total	15,873	26,709
Loans, current	1,693,564	1,646,613
Total loans	1,709,437	1,673,322
Commercial real estate: multifamily
Financing receivable recorded investment
Past due 30-59 days	862	685
Past due 90 days or greater	412	353
Past due 90 days or greater and still accruing	73
Past due, total	1,274	1,038
Loans, current	77,580	81,910
Total loans	78,854	82,948
Residential: first lien
Financing receivable recorded investment
Past due 30-59 days	4,093	4,305
Past due 60-89 days	1,232	2,510
Past due 90 days or greater	8,648	10,645
Past due 90 days or greater and still accruing	7,836	9,657
Past due, total	13,973	17,460
Loans, current	436,418	439,271
Total loans	450,391	456,731
Residential: junior lien
Financing receivable recorded investment
Past due 30-59 days	641	2,035
Past due 60-89 days	112	410
Past due 90 days or greater	434	259
Past due 90 days or greater and still accruing	372	115
Past due, total	1,187	2,704
Loans, current	377,510	379,032
Total loans	378,697	381,736
Consumer
Financing receivable recorded investment
Past due 30-59 days	1,702	1,598
Past due 60-89 days	299	404
Past due 90 days or greater	658	915
Past due 90 days or greater and still accruing	627	882
Past due, total	2,659	2,917
Loans, current	67,371	71,597
Total loans	70,030	74,514
Foreign
Financing receivable recorded investment
Past due 30-59 days	956	2,257
Past due 60-89 days	49	1,005
Past due 90 days or greater	556	264
Past due 90 days or greater and still accruing	535	264
Past due, total	1,561	3,526
Loans, current	183,076	185,448
Total loans	$ 184,637	$ 188,974

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Investment Securities (Tables)

3 Months Ended

Mar. 31, 2013

Investment Securities

Amortized cost and estimated fair value by type of investment security

The amortized cost and estimated fair value by type of investment security at March 31, 2013 are as follows:

	Held to Maturity
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value		Carrying Value
	(Dollars in Thousands)
Other securities	$	2,400	$	—	$	—	$	2,400	$	2,400
Total investment securities	$	2,400	$	—	$	—	$	2,400	$	2,400

	Available for Sale
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value		Carrying Value (1)
	(Dollars in Thousands)
Residential mortgage-backed securities	$	4,865,035	$	85,129	$	(26,953	)	$	4,923,211	$	4,923,211
Obligations of states and political subdivisions	218,090		20,162		(2,342		)	235,910		235,910
Equity securities	19,575		1,609		(31		)	21,153		21,153
Total investment securities	$	5,102,700	$	106,900	$	(29,326	)	$	5,180,274	$	5,180,274

(1) Included in the carrying value of residential mortgage-backed securities are $1,893,174 of mortgage-backed securities issued by Ginnie Mae, $2,999,340,of mortgage-backed securities issued by Fannie Mae and Freddie Mac and $30,697  issued by non-government entities

The amortized cost and estimated fair value by type of investment security at December 31, 2012 are as follows:

	Held to Maturity
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value		Carrying Value
	(Dollars in Thousands)
Other securities	$	2,400	$	—	$	—	$	2,400	$	2,400
Total investment securities	$	2,400	$	—	$	—	$	2,400	$	2,400

	Available for Sale
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value		Carrying Value (1)
	(Dollars in Thousands)
Residential mortgage-backed securities	$	5,186,652	$	94,585	$	(16,033	)	$	5,265,204	$	5,265,204
Obligations of states and political subdivisions	216,962		23,504		(1,791		)	238,675		238,675
Equity securities	19,575		1,581		(20		)	21,136		21,136
Total investment securities	$	5,423,189	$	119,670	$	(17,844	)	$	5,525,015	$	5,525,015

(1) Included in the carrying value of residential mortgage-backed securities are $2,035,742 of mortgage-backed securities issued by Ginnie Mae, $3,196,602 of mortgage-backed securities issued by Fannie Mae and Freddie Mac and $32,860  issued by non-government entities

Amortized cost and fair value of investment securities, by contractual maturity

	Held to Maturity				Available for Sale
	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
	(Dollars in Thousands)
Due in one year or less	$	1,200	$	1,200	$	—	$	—
Due after one year through five years	1,200		1,200		—		—
Due after five years through ten years	—		—		682		775
Due after ten years	—		—		217,408		235,135
Residential mortgage-backed securities	—		—		4,865,035		4,923,211
Equity securities	—		—		19,575		21,153
Total investment securities	$	2,400	$	2,400	$	5,102,700	$	5,180,274

Gross unrealized losses on investment securities and the related fair value

	Less than 12 Months					12 Months or More					Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
	(Dollars in Thousands)
Available for sale:
Residential mortgage-backed securities	$	2,140,381	$	(15,738	)	$	30,697	$	(11,215	)	$	2,171,078	$	(26,953	)
Obligations of states and political subdivisions	12,539		(442		)	10,250		(1,900		)	22,789		(2,342		)
Other equity securities	4,230		(21		)	65		(10		)	4,295		(31		)
	$	2,157,150	$	(16,201	)	$	41,012	$	(13,125	)	$	2,198,162	$	(29,326	)

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, 2012 were as follows:

	Less than 12 Months					12 Months or More					Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
	(Dollars in Thousands)
Available for sale:
Residential mortgage-backed securities	$	738,492	$	(5,476	)	$	32,860	$	(10,557	)	$	771,352	$	(16,033	)
Obligations of states and political subdivisions	5,117		(114		)	10,437		(1,677		)	15,554		(1,791		)
Equity securities	—		—			56		(20		)	56		(20		)
	$	743,609	$	(5,590	)	$	43,353	$	(12,254	)	$	786,962	$	(17,844	)

Reconciliation of credit-related impairment charges on available-for-sale investment

The following table presents a reconciliation of credit-related impairment charges on available-for-sale investments recognized in earnings for the three months ended March 31, 2013 and 2012, respectively (Dollars in Thousands):

Balance at December 31, 2012	$	10,432
Impairment charges recognized in earnings during period	310
Balance at March 31, 2013	$	10,742

Balance at December 31, 2011	$	9,393
Impairment charges recognized in earnings during period	186
Balance at March 31, 2012	$	9,579

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Consolidated Statements of Comprehensive Income (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Consolidated Statements of Comprehensive Income
Net unrealized holding losses on securities available for sale arising during period, tax effects	$ (5,143)	$ (3,959)
Reclassification adjustment for gains on securities available for sale included in net income, tax effects	(3,360)	(410)
Reclassification adjustment for impairment charges on available for sale securities included in net income, tax effects	$ 108	$ 65

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Consolidated Statements of Condition (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Consolidated Statements of Condition
Held-to-maturity, Market value (in dollars)	$ 2,400	$ 2,400
Available-for-sale, Amortized cost (in dollars)	5,102,700	5,423,189
Common shares, par value (in dollars per share)	$ 1.00	$ 1.00
Common shares, Authorized shares	275,000,000	275,000,000
Common shares, issued shares	95,725,560	95,724,517
Accumulated other comprehensive income, comprehensive loss related to other-than-temporary impairment for non-credit related issues (in dollars)	$ (7,234)	$ (6,811)
Treasury, shares	28,537,180	28,537,180

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Common Stock and Dividends

3 Months Ended

Mar. 31, 2013

Common Stock and Dividends

Common Stock and Dividends

Note 9 — Common Stock and Dividends

The Company had outstanding 216,000 shares of Series A cumulative perpetual preferred stock (the “Senior Preferred Stock”), issued to the US Treasury under the Company’s participation in the Troubled Asset Relief Program Capital Purchase Program (the “TARP Capital Purchase Program”).  The Company redeemed all of the Senior Preferred Stock in 2012.  In conjunction with the purchase of the Senior Preferred Stock, the US Treasury received a warrant (the “Warrant”) to purchase 1,326,238 shares of the Company’s common stock (the “Warrant Shares”) at $24.43 per share, which would represent an aggregate common stock investment in the Company on exercise of the warrant in full equal to 15% of the Senior Preferred Stock investment.  The term of the Warrant is ten years and was immediately exercisable.  The Warrant is included as a component of Tier 1 capital.  As of March 31, 2013, none of the Warrants had been exercised.

The Company paid cash dividends to the common shareholders of $.20 per share on April 19, 2013 to all holders of record on April 1, 2013.  Cash dividends of $.20 per share were paid to common shareholders on April 20, and October 15, 2012 to all holders of record on April 2 and September 28, 2012, respectively.

In April 2009, following receipt of the Treasury Department’s consent, the Board of Directors re-established a formal stock repurchase program that authorized the repurchase of up to $40 million of common stock within the following twelve months and on February 28, 2013, the Board of Directors extended the repurchase program and again authorized the repurchase of up to $40 million of common stock during the twelve month period commencing on April 9, 2013, which repurchase cap the Board is inclined to increase over time.  Stock repurchases may be made from time to time, on the open market or through private transactions.  Shares repurchased in this program will be held in treasury for reissue for various corporate purposes, including employee stock option plans.  As of May 6, 2013, a total of 7,843,293 shares had been repurchased under all programs at a cost of $237,536,000.

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Document and Entity Information	3 Months Ended
	Mar. 31, 2013	May 06, 2013
Document and Entity Information
Entity Registrant Name	INTERNATIONAL BANCSHARES CORP
Entity Central Index Key	0000315709
Document Type	10-Q
Document Period End Date	Mar. 31, 2013
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		67,189,605
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q1

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Commitments and Contingent Liabilities and Other Tax Matters

3 Months Ended

Mar. 31, 2013

Commitments and Contingent Liabilities and Other Tax Matters

Commitments and Contingent Liabilities and Other Tax Matters

Note 10 — Commitments and Contingent Liabilities and Other Tax Matters

The Company is involved in various legal proceedings that are in various stages of litigation.  Some of these actions allege “lender liability” claims on a variety of theories and claim substantial actual and punitive damages.  The Company has determined, based on discussions with its 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 the consolidated financial position or results of operations of the Company.  However, many of these matters are in various stages of proceedings and further developments could cause management to revise its assessment of these matters.

During the first quarter of 2013, the Texas State Comptroller refunded approximately $1.5 million in tax in connection with an exam of the Company’s 2008 consolidated Franchise Tax return. Additionally, the Company recorded an adjustment of $2.5 million to reflect the difference between accrued and actual taxes on the 2012 Franchise Tax return.  Both items resulted in a credit to provision for income tax expense net of federal tax expense, of approximately $2.6 million on the consolidated statement of income and reduced the Company’s effective tax rate to 25.4% for the three months ended March 31, 2013.

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Consolidated Statements of Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Interest income:
Loans, including fees	$ 63,534	$ 68,323
Investment securities:
Taxable	20,519	24,512
Tax-exempt	3,036	2,861
Other interest income	21	86
Total interest income	87,110	95,782
Interest expense:
Savings deposits	1,011	1,623
Time deposits	4,445	6,485
Securities sold under repurchase agreements	7,568	10,302
Other borrowings	290	208
Junior subordinated interest deferrable debentures	1,164	2,047
Total interest expense	14,478	20,665
Net interest income	72,632	75,117
Provision for probable loan losses	7,419	5,285
Net interest income after provision for probable loan losses	65,213	69,832
Non-interest income:
Service charges on deposit accounts	23,830	22,753
Other service charges, commissions and fees
Banking	9,983	10,064
Non-banking	1,061	1,251
Investment securities transactions, net	9,601	1,172
Other investments, net	6,997	5,134
Other income	1,780	2,803
Total non-interest income	53,252	43,177
Non-interest expense:
Employee compensation and benefits	30,211	29,401
Occupancy	7,812	8,734
Depreciation of bank premises and equipment	6,625	6,927
Professional fees	3,723	3,370
Deposit insurance assessments	1,616	1,567
Net expense, other real estate owned	1,789	1,181
Amortization of identified intangible assets	1,137	1,137
Advertising	1,846	1,827
Early termination fee - securities sold under repurchase agreements	9,885
Impairment charges (Total other-than-temporary impairment charges, $968 net of $658, and $1,650, net of $1,464, included in other comprehensive income)	310	186
Other	15,907	13,813
Total non-interest expense	80,861	68,143
Income before income taxes	37,604	44,866
Provision for income taxes	9,535	13,179
Net income	28,069	31,687
Preferred stock dividends		3,343
Net income available to common shareholders	$ 28,069	$ 28,344
Basic earnings per common share:
Weighted average number of shares outstanding: (in shares)	67,187,583	67,271,146
Net income (in dollars per share)	$ 0.42	$ 0.42
Fully diluted earnings per common share:
Weighted average number of shares outstanding: (in shares)	67,279,981	67,355,427
Net income (in dollars per share)	$ 0.42	$ 0.42

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Allowance for Probable Loan Losses

3 Months Ended

Mar. 31, 2013

Allowance for Probable Loan Losses

Allowance for Probable Loan Losses

Note 4 — Allowance for Probable Loan Losses

The allowance for probable loan losses primarily consists of the aggregate loan loss allowances of the bank subsidiaries.  The allowances are established through charges to operations in the form of provisions for probable loan losses.  Loan losses or recoveries are charged or credited directly to the allowances.  The allowance for probable loan losses of each bank subsidiary is maintained at a level considered appropriate by management, based on estimated probable losses in the loan portfolio.  The allowance for probable loan losses is derived from the following elements:  (i) allowances established on specific loans, which are based on a review of the individual characteristics of each loan, including the customer’s ability to repay the loan, the underlying collateral values, and the industry in which the customer operates, (ii) allowances based on actual historical loss experience for similar types of loans in the Company’s loan portfolio, and (iii) allowances based on general economic conditions, changes in the mix of loans, company resources, border risk and credit quality indicators, among other things.  All segments of the loan portfolio continue to be impacted by the prolonged economic downturn.  Loans secured by real estate could be impacted negatively by the continued economic environment and resulting decrease in collateral values.  Consumer loans may be impacted by continued and prolonged unemployment rates.

The Company’s management continually reviews the allowance for loan losses of the bank subsidiaries using the amounts determined from the allowances established on specific loans, the allowance established on quantitative historical loss percentages, and the allowance based on qualitative data to establish an appropriate amount to maintain in the Company’s allowance for loan losses.  Should any of the factors considered by management in evaluating the adequacy of the allowance for probable loan losses change, the Company’s estimate of probable loan losses could also change, which could affect the level of future provisions for probable loan losses.  While the calculation of the allowance for probable loan losses utilizes management’s best judgment and all information available, the adequacy of the allowance is dependent on a variety of factors beyond the Company’s control, including, among other things, the performance of the entire loan portfolio, the economy, changes in interest rates and the view of regulatory authorities towards loan classifications.

The specific loan loss provision is determined using the following methods.  On a weekly basis, 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 the Company’s internal classified report.  Additionally, the Company’s credit department reviews the majority of the Company’s 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, the Company will determine if a loan should be placed on an internal classified report because of issues related to the analysis of the credit, credit documents, collateral and/or payment history.

A summary of the transactions in the allowance for probable loan losses by loan class is as follows:

	2013
	Domestic																		Foreign
	Commercial			Commercial real estate: other construction & land development			Commercial real estate: farmland & commercial			Commercial real estate: multifamily			Residential: first lien			Residential: junior lien			Consumer			Foreign			Total
	(Dollars in Thousands)
Balance at December 31,	$	11,632		$	12,720		$	21,880		$	694		$	4,390		$	4,448		$	1,289		$	1,140		$	58,193
Losses charge to allowance	(2,663		)	(128		)	(60		)	—			(172		)	(255		)	(211		)	(20		)	(3,509		)
Recoveries credited to allowance	694			13			13			—			5			94			46			—			865
Net losses charged to allowance	(1,969		)	(115		)	(47		)	—			(167		)	(161		)	(165		)	(20		)	(2,644		)
Provision charged to operations	11,263			(1,552		)	(1,182		)	(85		)	(355		)	(276		)	(304		)	(90		)	7,419
Balance at March 31,	$	20,926		$	11,053		$	20,651		$	609		$	3,868		$	4,011		$	820		$	1,030		$	62,968

	2012
	Domestic																		Foreign
	Commercial			Commercial real estate: other construction & land development			Commercial real estate: farmland & commercial			Commercial real estate: multifamily			Residential: first lien			Residential: junior lien			Consumer			Foreign			Total
	(Dollars in Thousands)
Balance at December 31,	$	26,617		$	19,940		$	24,227		$	1,003		$	4,562		$	4,760		$	1,724		$	1,359		$	84,192
Losses charge to allowance	(3,424		)	(71		)	(7,994		)	—			(36		)	(312		)	(247		)	—			(12,084		)
Recoveries credited to allowance	1,244			5			31			—			2			45			61			—			1,388
Net losses charged to allowance	(2,180		)	(66		)	(7.963		)	—			(34		)	(267		)	(186		)	—			(10,696		)
Provision charged to operations	140			(108		)	5,546			(154		)	(149		)	12			64			(66		)	5,285
Balance at March 31,	$	24,577		$	19,766		$	21,810		$	849		$	4, 379		$	4,505		$	1,602		$	1,293		$	78,781

The allowance for probable loan losses is a reserve established through a provision for probable loan losses charged to expense, which represents management’s best estimate of probable loan losses when evaluating loans (i) individually or (ii) collectively.  The allowance for probable loan losses increased 8.2% to $62,968,000 at March 31, 2013 from $58,193,000 at December 31,2012.  The change is primarily driven by the addition of a specific reserve of approximately $10,000,0000 on a previously identified impaired commercial loan that  further deteriorated during the three months ended March 31,2013, partially offset by a decrease in the general reserve due to the stability of general economic factors evaluated by management.

The table below provides additional information on the balance of loans individually or collectively evaluated for impairment and their related allowance, by loan class as of March 31, 2013 and December 31, 2012:

	March 31, 2013
	Loans individually evaluated for impairment				Loans collectively evaluated for impairment
	Recorded Investment		Allowance		Recorded Investment		Allowance
	(Dollars in Thousands)
Domestic
Commercial	$	33,108	$	11,544	$	835,849	$	9,382
Commercial real estate: other construction & land development	26,172		823		1,059,334		10,230
Commercial real estate: farmland & commercial	11,900		2,644		1,697,537		18,007
Commercial real estate: multifamily	338		—		78,516		609
Residential: first lien	4,546		—		445,845		3,868
Residential: junior lien	1,702		—		376,995		4,011
Consumer	1,245		—		68,785		820
Foreign	462		—		184,175		1,030
Total	$	79,473	$	15,011	$	4,747,036	$	47,957

	December 31, 2012
	Loans individually evaluated for impairment				Loans collectively evaluated for impairment
	Recorded Investment		Allowance		Recorded Investment		Allowance
	(Dollars in Thousands)
Domestic
Commercial	$	32,768	$	1,477	$	736,342	$	10,155
Commercial real estate: other construction & land development	28,660		539		1,119,009		12,181
Commercial real estate: farmland & commercial	13,945		2,730		1,659,377		19,150
Commercial real estate: multifamily	353		—		82,595		694
Residential: first lien	3,656		—		453,075		4,390
Residential: junior lien	1,850		—		379,886		4,448
Consumer	1,326		—		73,188		1,289
Foreign	447		—		188,527		1,140
Total	$	83,005	$	4,746	$	4,691,999	$	53,447

The table below provides additional information on loans accounted for on a non-accrual basis by loan class at March 31, 2013 and December 31, 2012:

	March 31, 2013		December 31, 2012
	(Dollars in Thousands)
Domestic
Commercial	$	32,292	$	31,929
Commercial real estate: other construction & land development	23,922		26,410
Commercial real estate: farmland & commercial	9,636		11,681
Commercial real estate: multifamily	338		353
Residential: first lien	1,702		1,175
Residential: junior lien	126		175
Consumer	42		45
Foreign	21		—
Total non-accrual loans	$	68,079	$	71,768

Impaired loans are those loans where it is probable that all amounts due according to contractual terms of the loan agreement will not be collected.  The Company has identified these loans through its normal loan review procedures.    Impaired loans are measured based on (1) the present value of expected future cash flows discounted at the loan’s effective interest rate; (2) the loan’s observable market price; or (3) the fair value of the collateral if the loan is collateral dependent.  Substantially all of the Company’s impaired loans are measured at the fair value of the collateral. In limited cases the Company may use other methods to determine the level of impairment of a loan if such loan is not collateral dependent.

The following tables detail key information regarding the Company’s impaired loans by loan class at March 31, 2013 and December 31, 2012:

	March 31, 2013
	Recorded Investment		Unpaid Principal Balance		Related Allowance		Average Recorded Investment		Interest Recognized
	(Dollars in Thousands)
Loans with Related Allowance
Domestic
Commercial	$	18,668	$	18,702	$	11,544	$	18,688	$	9
Commercial real estate: other construction & land development	5,516		5,605		823		5,478		—
Commercial real estate: farmland & commercial	6,438		9,717		2,644		6,452		23
Total impaired loans with related allowance	$	30,622	$	34,024	$	15,011	$	30,618	$	32

	March 31, 2013
	Recorded Investment		Unpaid Principal Balance		Average Recorded Investment		Interest Recognized
	(Dollars in Thousands)
Loans with No Related Allowance
Domestic
Commercial	$	14,440	$	14,487	$	15,147	$	1
Commercial real estate: other construction & land development	20,656		20,743		20,878		18
Commercial real estate: farmland & commercial	5,462		6,232		5,006		—
Commercial real estate: multifamily	338		338		345		—
Residential: first lien	4,546		4,595		3,840		33
Residential: junior lien	1,702		1,720		1,732		24
Consumer	1,245		1,250		1,246		—
Foreign	462		463		457		5
Total impaired loans with no related allowance	$	48,851	$	49,828	$	48,651	$	81

	December 31, 2012
	Recorded Investment		Unpaid Principal Balance		Related Allowance		Average Recorded Investment		Interest Recognized
	(Dollars in Thousands)
Loans with Related Allowance
Domestic
Commercial	$	1,633	$	1,679	$	1,477	$	21,126	$	39
Commercial real estate: other construction & land development	3,671		3,671		539		6,608		—
Commercial real estate: farmland & commercial	6,678		9,923		2,730		7,342		92
Total impaired loans with related allowance	$	11,982	$	15,273	$	4,746	$	35,076	$	131

	December 31, 2012
	Recorded Investment		Unpaid Principal Balance		Average Recorded Investment		Interest Recognized
	(Dollars in Thousands)
Loans with No Related Allowance
Domestic
Commercial	$	31,135	$	31,170	$	2,996	$	4
Commercial real estate: other construction & land development	24,989		25,160		39,449		141
Commercial real estate: farmland & commercial	7,267		9,340		16,536		8
Commercial real estate: multifamily	353		353		381		—
Residential: first lien	3,656		3,984		2,876		60
Residential: junior lien	1,850		1,944		1,939		104
Consumer	1,326		1,330		1,193		—
Foreign	447		447		166		6
Total impaired loans with no related allowance	$	71,023	$	73,728	$	65,536	$	323

A portion of the impaired loans have adequate collateral and credit enhancements not requiring a related allowance for loan loss.  The level of impaired loans is reflective of the economic weakness that has been created by the financial crisis and the subsequent economic downturn.  Management is confident the Company’s loss exposure regarding these credits will be significantly reduced due to the Company’s long-standing practices that emphasize secured lending with strong collateral positions and guarantor support.  Management is likewise confident the reserve for probable loan losses is adequate.  The Company has no direct exposure to sub-prime loans in its loan portfolio, but the sub-prime crisis has affected the credit markets on a national level, and as a result, the Company has experienced an increasing amount of impaired loans; however, management’s decision to place loans in this category does not necessarily mean that the Company will experience significant losses from these loans or significant increases in impaired loans from these levels.

Management of the Company recognizes the risks associated with these impaired loans.  However, management’s decision to place loans in this category does not necessarily mean that losses will occur. In the current environment, troubled loan management can be protracted because of the legal and process problems that delay the collection of an otherwise collectable loan.  Additionally, management believes that the collateral related to these impaired loans and/or the secondary support from guarantors mitigates the potential for losses from impaired loans.    It is also important to note that even though the economic conditions in Texas and Oklahoma are weakened, we believe these markets are improving and better positioned to recover than many other areas of the country.  Loans accounted for as “troubled debt restructuring,” which are included in impaired loans, were not significant and totaled $19,232,000 and $24,300,000 as of March 31, 2013 and December 31, 2012, respectively.

The bank subsidiaries 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 and industrial or real estate loans are generally considered by management to represent a loss, in whole or part, when an exposure beyond any collateral coverage is apparent and when no further collection of the loss portion is anticipated based on the borrower’s financial condition and general economic conditions in the borrower’s industry. Generally, unsecured consumer loans are charged-off when 90 days past due.

While management of the Company 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 allowance for probable loan losses can be made only on a subjective basis.  It is the judgment of the Company’s management that the allowance for probable loan losses at March 31, 2013 was adequate to absorb probable losses from loans in the portfolio at that date.

The following table presents information regarding the aging of past due loans by loan class at March 31, 2013 and December 31, 2012:

	March 31, 2013
	30 – 59 Days		60 – 89 Days		90 Days or Greater		90 Days or greater & still accruing		Total Past due		Current		Total Portfolio
	(Dollars in Thousands)
Domestic
Commercial	$	4,024	$	25,758	$	4,457	$	3,762	$	34,239	$	834,718	$	868,957
Commercial real estate: other construction & land development	556		14,352		30,668		7,910		45,576		1,039,930		1,085,506
Commercial real estate: farmland & commercial	6,067		2,039		7,767		4,491		15,873		1,693,564		1,709,437
Commercial real estate: multifamily	862		—		412		73		1,274		77,580		78,854
Residential: first lien	4,093		1,232		8,648		7,836		13,973		436,418		450,391
Residential: junior lien	641		112		434		372		1,187		377,510		378,697
Consumer	1,702		299		658		627		2,659		67,371		70,030
Foreign	956		49		556		535		1,561		183,076		184,637
Total past due loans	$	18,901	$	43,841	$	53,600	$	25,606	$	116,342	$	4,710,167	$	4,826,509

	December 31, 2012
	30 – 59 Days		60 – 89 Days		90 Days or Greater		90 Days or greater & still accruing		Total Past due		Current		Total Portfolio
	(Dollars in Thousands)
Domestic
Commercial	$	4,393	$	471	$	3,386	$	2,689	$	8,250	$	760,860	$	769,110
Commercial real estate: other construction & land development	1,107		2,300		24,225		497		27,632		1,120,037		1,147,669
Commercial real estate: farmland & commercial	3,127		21,272		2,310		929		26,709		1,646,613		1,673,322
Commercial real estate: multifamily	685		—		353		—		1,038		81,910		82,948
Residential: first lien	4,305		2,510		10,645		9,657		17,460		439,271		456,731
Residential: junior lien	2,035		410		259		115		2,704		379,032		381,736
Consumer	1,598		404		915		882		2,917		71,597		74,514
Foreign	2,257		1,005		264		264		3,526		185,448		188,974
Total past due loans	$	19,507	$	28,372	$	42,357	$	15,033	$	90,236	$	4,684,768	$	4,775,004

The Company’s 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 the Company’s 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 the Company’s 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 some future loss could be sustained by the Company if such weaknesses are not corrected.  For loans that are classified as impaired, management evaluates these credits ASC 310-10, “Receivables,” and, if deemed necessary, a specific reserve is allocated to the credit.  The specific reserve allocated under ASC 310-10, is 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 the Company’s loans evaluated as impaired under ASC 310-10 are measured using the fair value of collateral method.  In limited cases, the Company may use other methods to determine the specific reserve of a loan under ASC 310-10 if such loan is not collateral dependent.

The allowance based on historical loss experience on the Company’s remaining loan portfolio, which includes the “Special Review Credits,” “Watch List - Pass Credits,” and “Watch List - Substandard Credits” is determined by segregating the remaining loan portfolio into certain categories such as commercial loans, installment loans, international loans, loan concentrations and overdrafts.  Installment loans are then further segregated by number of days past due.  A historical loss percentage, adjusted for (i) management’s evaluation of changes in lending policies and procedures, (ii) current economic conditions in the market area served by the Company, (iii) other risk factors, (iv) the effectiveness of the internal loan review function, (v) changes in loan portfolios, and (vi) the composition and concentration of credit volume is applied to each category.  Each category is then added together to determine the allowance allocated under ASC 450-20.

A summary of the loan portfolio by credit quality indicator by loan class at March 31, 2013 and December 31, 2012 is as follows:

			March 31, 2013
	Pass		Special Review		Watch List - Pass		Watch List - Substandard		Watch List - Impaired
			(Dollars in Thousands)
Domestic
Commercial	$	775,851	$	3,986	$	15,888	$	40,124	$	33,108
Commercial real estate: other construction & land development	992,504		34,790		2,901		29,139		26,172
Commercial real estate: farmland & commercial	1,555,921		86,445		32,798		22,373		11,900
Commercial real estate: multifamily	78,465		—		51		—		338
Residential: first lien	439,754		517		—		5,574		4,546
Residential: junior lien	375,111		77		—		1,807		1,702
Consumer	68,785		—		—		—		1,245
Foreign	183,814		—		—		361		462
Total	$	4,470,205	$	125,815	$	51,638	$	99,378	$	79,473

			December 31, 2012
	Pass		Special Review		Watch List - Pass		Watch List - Substandard		Watch List - Impaired
			(Dollars in Thousands)
Domestic
Commercial	$	675,263	$	4,278	$	16,535	$	40,266	$	32,768
Commercial real estate: other construction & land development	1,038,749		55,079		2,614		22,567		28,660
Commercial real estate: farmland & commercial	1,486,572		109,144		46,316		17,345		13,945
Commercial real estate: multifamily	82,542		—		53		—		353
Residential: first lien	446,218		519		—		6,338		3,656
Residential: junior lien	378,000		77		309		1,500		1,850
Consumer	73,188		—		—		—		1,326
Foreign	188,499		—		28		—		447
Total	$	4,369,031	$	169,097	$	65,855	$	88,016	$	83,005

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Loans

3 Months Ended

Mar. 31, 2013

Loans

Loans

Note 3 — Loans

A summary of loans, by loan type at March 31, 2013 and December 31, 2012 is as follows:

	March 31,		December 31,
	2013		2012
	(Dollars in Thousands)
Commercial, financial and agricultural	$	2,657,248	$	2,525,380
Real estate — mortgage	829,088		838,467
Real estate — construction	1,085,506		1,147,669
Consumer	70,030		74,514
Foreign	184,637		188,974
Total loans	$	4,826,509	$	4,775,004

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Stock Options (Tables)

3 Months Ended

Mar. 31, 2013

Stock Options

Summary of option activity under stock option plans

	Number of options	Weighted average exercise price		Weighted average remaining contractual term (years)	Aggregate intrinsic value ($)
					(Dollars in Thousands)
Options outstanding at December 31, 2012	794,877	$	19.03
Plus: Options granted	—	—
Less:
Options exercised	1,043	11.54
Options expired	22,343	23.50
Options forfeited	14,275	17.15
Options outstanding at March 31, 2013	757,216	18.95		3.63	3,164
Options fully vested and exercisable at March 31, 2013	382,186	23.7		1.64	603

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Capital Ratios

3 Months Ended

Mar. 31, 2013

Capital Ratios

Capital Ratios

Note 11 — Capital Ratios

The Company had a Tier 1 capital to average total asset (leverage) ratio of 11.38% and 10.86%, risk-weighted Tier 1 capital ratio of 20.31% and 19.65% and risk-weighted total capital ratio of 21.36% and 20.60% at March 31, 2013 and December 31, 2012, respectively.  The identified intangibles and goodwill of $289,214,000 as of March 31, 2013, recorded in connection with the acquisitions made by the Company, are deducted from the sum of core capital elements when determining the capital ratios of the Company.  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 qualifies as Tier 2 capital.  As of March 31, 2013, the total of $190,726,000 of the Capital Securities outstanding qualified as Tier 1 capital.  The Company actively monitors the regulatory capital ratios to ensure that the Company’s bank subsidiaries are well capitalized under the regulatory framework.

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Other Borrowed Funds

3 Months Ended

Mar. 31, 2013

Other Borrowed Funds

Other Borrowed Funds

Note 7 — Other Borrowed Funds

Other borrowed funds include Federal Home Loan Bank borrowings, which are short-term and long-term borrowings issued by the FHLB of Dallas at the market price offered at the time of funding.  These borrowings are secured by residential mortgage-backed investment securities and a portion of the Company’s loan portfolio.  At March 31, 2013, other borrowed funds totaled $387,493,000, a decrease of 48.3% from $749,027,000 at December 31, 2012.  The decrease in other borrowed funds can be attributed to the use of funds generated from the sale of mortgage-backed securities to facilitate a re-positioning of the Company’s investment portfolio.

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Stock Options

3 Months Ended

Mar. 31, 2013

Stock Options

Stock Options

Note 5 — Stock Options

On April 5, 2012, the Board of Directors adopted the 2012 International Bancshares Corporation Stock Option Plan (the “2012 Plan”). There are 800,000 shares available for stock option grants under the 2012 Plan. Under the 2012 Plan, both qualified incentive stock options (“ISOs”) and non-qualified stock options (“NQSOs”) may be granted. 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. As of March 31, 2013, 757,500 shares were available for future grants under the 2012 Plan.

A summary of option activity under the stock option plans for the three months ended March 31, 2013 is as follows:

	Number of options	Weighted average exercise price		Weighted average remaining contractual term (years)	Aggregate intrinsic value ($)
					(Dollars in Thousands)
Options outstanding at December 31, 2012	794,877	$	19.03
Plus: Options granted	—	—
Less:
Options exercised	1,043	11.54
Options expired	22,343	23.50
Options forfeited	14,275	17.15
Options outstanding at March 31, 2013	757,216	18.95		3.63	3,164
Options fully vested and exercisable at March 31, 2013	382,186	23.7		1.64	603

Stock-based compensation expense included in the consolidated statements of income for the three months ended March 31, 2013 and March 31, 2012 was approximately $114,000 and $131,000, respectively.  As of March 31, 2013, there was approximately $1,043,000 of total unrecognized stock-based compensation cost related to non-vested options granted under the Company plans that will be recognized over a weighted average period of 1.9 years.

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Investment Securities

3 Months Ended

Mar. 31, 2013

Investment Securities

Investment Securities

Note 6 — Investment Securities

The Company classifies debt and equity securities into one of three categories:  held-to maturity, available-for-sale, or trading.  Such securities are reassessed for appropriate classification at each reporting date.  Securities classified as “held-to-maturity” are carried at amortized cost for financial statement reporting, while securities classified as “available-for-sale” and “trading” 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 accumulated other comprehensive income (loss) until realized, or in the case of losses, when deemed other than temporary.

The amortized cost and estimated fair value by type of investment security at March 31, 2013 are as follows:

	Held to Maturity
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value		Carrying Value
	(Dollars in Thousands)
Other securities	$	2,400	$	—	$	—	$	2,400	$	2,400
Total investment securities	$	2,400	$	—	$	—	$	2,400	$	2,400

	Available for Sale
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value		Carrying Value (1)
	(Dollars in Thousands)
Residential mortgage-backed securities	$	4,865,035	$	85,129	$	(26,953	)	$	4,923,211	$	4,923,211
Obligations of states and political subdivisions	218,090		20,162		(2,342		)	235,910		235,910
Equity securities	19,575		1,609		(31		)	21,153		21,153
Total investment securities	$	5,102,700	$	106,900	$	(29,326	)	$	5,180,274	$	5,180,274

(1) Included in the carrying value of residential mortgage-backed securities are $1,893,174 of mortgage-backed securities issued by Ginnie Mae, $2,999,340,of mortgage-backed securities issued by Fannie Mae and Freddie Mac and $30,697  issued by non-government entities

The amortized cost and estimated fair value by type of investment security at December 31, 2012 are as follows:

	Held to Maturity
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value		Carrying Value
	(Dollars in Thousands)
Other securities	$	2,400	$	—	$	—	$	2,400	$	2,400
Total investment securities	$	2,400	$	—	$	—	$	2,400	$	2,400

	Available for Sale
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value		Carrying Value (1)
	(Dollars in Thousands)
Residential mortgage-backed securities	$	5,186,652	$	94,585	$	(16,033	)	$	5,265,204	$	5,265,204
Obligations of states and political subdivisions	216,962		23,504		(1,791		)	238,675		238,675
Equity securities	19,575		1,581		(20		)	21,136		21,136
Total investment securities	$	5,423,189	$	119,670	$	(17,844	)	$	5,525,015	$	5,525,015

(1) Included in the carrying value of residential mortgage-backed securities are $2,035,742 of mortgage-backed securities issued by Ginnie Mae, $3,196,602 of mortgage-backed securities issued by Fannie Mae and Freddie Mac and $32,860  issued by non-government entities

The amortized cost and estimated fair value of investment securities at March 31, 2013, 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 Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
	(Dollars in Thousands)
Due in one year or less	$	1,200	$	1,200	$	—	$	—
Due after one year through five years	1,200		1,200		—		—
Due after five years through ten years	—		—		682		775
Due after ten years	—		—		217,408		235,135
Residential mortgage-backed securities	—		—		4,865,035		4,923,211
Equity securities	—		—		19,575		21,153
Total investment securities	$	2,400	$	2,400	$	5,102,700	$	5,180,274

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, the Company believes 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 or 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 $2,200,421,000 and $2,267,420,000, respectively, at March 31, 2013.

Proceeds from the sale of securities available-for-sale were $178,124,000 for the three months ended March 31, 2013, which included $177,623,000 of mortgage-backed securities. Gross gains of $9,601,000 and gross losses of $0 were realized on the sales for the three months ended March 31, 2013.  Proceeds from the sale of securities available-for-sale were $17,331,000 for the three months ended March 31, 2012, which included $0 of mortgage-backed securities. Gross gains of $1,173,000 and gross losses of $(1,000) were realized on the sales for the three months ended March 31, 2012.

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 March 31, 2013, were as follows:

	Less than 12 Months					12 Months or More					Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
	(Dollars in Thousands)
Available for sale:
Residential mortgage-backed securities	$	2,140,381	$	(15,738	)	$	30,697	$	(11,215	)	$	2,171,078	$	(26,953	)
Obligations of states and political subdivisions	12,539		(442		)	10,250		(1,900		)	22,789		(2,342		)
Other equity securities	4,230		(21		)	65		(10		)	4,295		(31		)
	$	2,157,150	$	(16,201	)	$	41,012	$	(13,125	)	$	2,198,162	$	(29,326	)

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, 2012 were as follows:

	Less than 12 Months					12 Months or More					Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
	(Dollars in Thousands)
Available for sale:
Residential mortgage-backed securities	$	738,492	$	(5,476	)	$	32,860	$	(10,557	)	$	771,352	$	(16,033	)
Obligations of states and political subdivisions	5,117		(114		)	10,437		(1,677		)	15,554		(1,791		)
Equity securities	—		—			56		(20		)	56		(20		)
	$	743,609	$	(5,590	)	$	43,353	$	(12,254	)	$	786,962	$	(17,844	)

The unrealized losses on investments in residential mortgage-backed securities are primarily caused by changes in market interest rates.  Residential mortgage-backed securities are primarily securities issued by Freddie Mac, Fannie Mae and Ginnie Mae.  Investments in 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, the Company believes 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 or Freddie Mac are rated consistently as AAA rated securities.  The decrease in fair value on residential mortgage-backed securities issued by Freddie Mac, Fannie Mae and Ginnie Mae is due to market interest rates.  The Company has no intent to sell such mortgage-backed securities, and will more than likely not be required to sell such securities before a market price recovery or maturity of the securities; therefore, it is the conclusion of the Company that the investments in residential mortgage-backed securities issued by Freddie Mac, Fannie Mae and Ginnie Mae are not considered other-than-temporarily impaired.  In addition, the Company has a small investment in non-agency residential mortgage-backed securities that have strong credit backgrounds and include additional credit enhancements to protect the Company from losses arising from high foreclosure rates.  These securities have additional market volatility beyond economically induced interest rate events.  It is the conclusion of the Company that the investments in non-agency residential mortgage-backed securities are other-than-temporarily impaired due to both credit and other than credit issues.  Impairment charges of $310,000 ($201,500, after tax) and $186,000 ($121,000, after tax) were recorded for the quarters ended March 31, 2013 and 2012, respectively.  The impairment charge represents the credit related impairment on the securities.

The unrealized losses on investments in other securities are caused by fluctuations in market interest rates.  The underlying cash obligations of the securities are guaranteed by the entity underwriting the debt instrument.  It is the belief of the Company that the entity issuing the debt will honor its interest payment schedule, as well as the full debt at maturity.  The securities are purchased by the Company for their economic value.  The decrease in fair value is primarily due to market interest rates and not other factors, and because the Company has no intent to sell and will more than likely not be required to sell before a market price recovery or maturity of the securities, it is the conclusion of the Company that the investments are not considered other-than-temporarily impaired.

The following table presents a reconciliation of credit-related impairment charges on available-for-sale investments recognized in earnings for the three months ended March 31, 2013 and 2012, respectively (Dollars in Thousands):

Balance at December 31, 2012	$	10,432
Impairment charges recognized in earnings during period	310
Balance at March 31, 2013	$	10,742

Balance at December 31, 2011	$	9,393
Impairment charges recognized in earnings during period	186
Balance at March 31, 2012	$	9,579

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Junior Subordinated Interest Deferrable Debentures

3 Months Ended

Mar. 31, 2013

Junior Subordinated Interest Deferrable Debentures

Junior Subordinated Interest Deferrable Debentures

Note 8 — Junior Subordinated Interest Deferrable Debentures

The Company has formed seven statutory business trusts under the laws of the State of Delaware, for the purpose of issuing trust preferred securities. The seven statutory business trusts formed by the Company (the “Trusts”) have each issued Capital and Common Securities and invested the proceeds thereof in an equivalent amount of junior subordinated debentures (the “Debentures”) issued by the Company. As of March 31, 2013 and December 31, 2012, the principal amount of debentures outstanding totaled $190,726,000.

The Debentures are subordinated and junior in right of payment to all present and future senior indebtedness (as defined in the respective indentures) of the Company, and are pari passu with one another. The interest rate payable on, and the payment terms of the Debentures are the same as the distribution rate and payment terms of the respective issues of Capital and Common Securities issued by the Trusts. The Company has fully and unconditionally guaranteed the obligations of each of the Trusts with respect to the Capital and Common Securities. The Company has the right, unless an Event of Default (as defined in the Indentures) has occurred and is continuing, to defer payment of interest on the Debentures for up to twenty consecutive quarterly periods on Trusts VI, VII, VIII, IX, X, XI and XII. If interest payments on any of the Debentures are deferred, distributions on both the Capital and Common Securities related to that Debenture would also be deferred. The redemption prior to maturity of any of the Debentures may require the prior approval of the Federal Reserve and/or other regulatory bodies.

For financial reporting purposes, the Trusts are treated as investments of the Company 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 March 31, 2013 and December 31, 2012, the total $190,726,000 of the Capital Securities outstanding qualified as Tier 1 capital.

The following table illustrates key information about each of the Capital and Common Securities and their interest rate at March 31, 2013:

	Junior Subordinated Deferrable Interest Debentures		Repricing Frequency	Interest Rate		Interest Rate Index	Maturity Date	Optional Redemption Date(1)
	(In Thousands)
Trust VI	$	25,774	Quarterly	3.74	%	LIBOR + 3.45	November 2032	February 2008
Trust VII	10,310		Quarterly	3.55	%	LIBOR + 3.25	April 2033	April 2008
Trust VIII	25,774		Quarterly	3.35	%	LIBOR + 3.05	October 2033	October 2008
Trust IX	41,238		Quarterly	1.93	%	LIBOR + 1.62	October 2036	October 2011
Trust X	34,021		Quarterly	1.95	%	LIBOR + 1.65	February 2037	February 2012
Trust XI	32,990		Quarterly	1.93	%	LIBOR + 1.62	July 2037	July 2012
Trust XII	20,619		Quarterly	1.74	%	LIBOR + 1.45	September 2037	September 2012
	$	190,726

(1) The Capital Securities may be redeemed in whole or in part on any interest payment date after the Optional Redemption Date.

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Allowance for Probable Loan Losses (Details 3) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Loan loss allowances, financing receivable past due
Non-accrual loans, total	$ 68,079	$ 71,768
Commercial
Loan loss allowances, financing receivable past due
Non-accrual loans, total	32,292	31,929
Commercial real estate: other construction and land development
Loan loss allowances, financing receivable past due
Non-accrual loans, total	23,922	26,410
Commercial real estate: farmland and commercial
Loan loss allowances, financing receivable past due
Non-accrual loans, total	9,636	11,681
Commercial real estate: multifamily
Loan loss allowances, financing receivable past due
Non-accrual loans, total	338	353
Residential: first lien
Loan loss allowances, financing receivable past due
Non-accrual loans, total	1,702	1,175
Residential: junior lien
Loan loss allowances, financing receivable past due
Non-accrual loans, total	126	175
Consumer
Loan loss allowances, financing receivable past due
Non-accrual loans, total	42	45
Foreign
Loan loss allowances, financing receivable past due
Non-accrual loans, total	$ 21

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Loans (Tables)

3 Months Ended

Mar. 31, 2013

Loans

Summary of loans, by loan type

	March 31,		December 31,
	2013		2012
	(Dollars in Thousands)
Commercial, financial and agricultural	$	2,657,248	$	2,525,380
Real estate — mortgage	829,088		838,467
Real estate — construction	1,085,506		1,147,669
Consumer	70,030		74,514
Foreign	184,637		188,974
Total loans	$	4,826,509	$	4,775,004

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Basis of Presentation (Details)	3 Months Ended
	Mar. 31, 2013 item
Basis of Presentation
Number of operating segments	1
Number of active operating bank subsidiaries	4

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Investment Securities (Details 3) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Available for sale:
Fair value, less than 12 months	$ 2,157,150	$ 743,609
Unrealized losses, less than 12 months	(16,201)	(5,590)
Fair value, 12 months or more	41,012	43,353
Unrealized losses, 12 months or more	(13,125)	(12,254)
Fair value, total	2,198,162	786,962
Unrealized losses, total	(29,326)	(17,844)
Residential mortgage-backed securities
Available for sale:
Fair value, less than 12 months	2,140,381	738,492
Unrealized losses, less than 12 months	(15,738)	(5,476)
Fair value, 12 months or more	30,697	32,860
Unrealized losses, 12 months or more	(11,215)	(10,557)
Fair value, total	2,171,078	771,352
Unrealized losses, total	(26,953)	(16,033)
Obligations of states and political subdivisions
Available for sale:
Fair value, less than 12 months	12,539	5,117
Unrealized losses, less than 12 months	(442)	(114)
Fair value, 12 months or more	10,250	10,437
Unrealized losses, 12 months or more	(1,900)	(1,677)
Fair value, total	22,789	15,554
Unrealized losses, total	(2,342)	(1,791)
Other equity securities
Available for sale:
Fair value, less than 12 months	4,230
Unrealized losses, less than 12 months	(21)
Fair value, 12 months or more	65
Unrealized losses, 12 months or more	(10)
Fair value, total	4,295
Unrealized losses, total	(31)
Equity Securities
Available for sale:
Fair value, 12 months or more		56
Unrealized losses, 12 months or more		(20)
Fair value, total		56
Unrealized losses, total		$ (20)

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Consolidated Statements of Income (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Consolidated Statements of Income
Impairment charges, other-than-temporary impairment charges	$ 968	$ 1,650
Impairment charges, other comprehensive income	$ 658	$ 1,464

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Fair Value Measurements

3 Months Ended

Mar. 31, 2013

Fair Value Measurements

Fair Value Measurements

Note 2 — Fair Value Measurements

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 assets and liabilities reported on the consolidated balance sheets at their fair value as of March 31, 2013 by level within the fair value measurement hierarchy:

			Fair Value Measurements at Reporting Date Using
			(in thousands)
	Assets/Liabilities Measured at Fair Value		Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
	March 31, 2013		(Level 1)		(Level 2)		(Level 3)
Measured on a recurring basis:
Assets:
Available for sale securities
Residential mortgage-backed securities	$	4,923,211	$	—	$	4,892,514	$	30,697
States and political subdivisions	235,910		—		235,910		—
Other	21,153		21,153		—		—
	$	5,180,274	$	21,153	$	5,128,424	$	30,697

The following table represents assets and liabilities reported on the consolidated balance sheets at their fair value as of December 31, 2012 by level within the fair value measurement hierarchy:

			Fair Value Measurements at Reporting Date Using
			(in thousands)
	Assets/Liabilities Measured at Fair Value		Quoted Prices in Active Markets for Identical		Significant Other Observable		Significant Unobservable
	December 31, 2012		Assets (Level 1)		Inputs (Level 2)		Inputs (Level 3)
Measured on a recurring basis:
Assets:
Available for sale securities
Residential mortgage-backed securities	$	5,265,204	$	—	$	5,232,344	$	32,860
States and political subdivisions	238,675		—		238,675		—
Other	21,136		21,136		—		—
	$	5,525,015	$	21,136	$	5,471,019	$	32,860

Investment securities available-for-sale are classified within level 2 and level 3 of the valuation hierarchy, with the exception of certain equity investments that are classified within level 1.  For investments classified as level 2 in the fair value hierarchy, the Company obtains fair value measurements for investment securities 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.  Investment securities classified as level 3 are non-agency mortgage-backed securities.  The non-agency mortgage-backed securities held by the Company are traded in inactive markets and markets that have experienced significant decreases in volume and level of activity, as evidenced by few recent transactions, a significant decline or absence of new issuances, price quotations that are not based on comparable securities transactions and wide bid-ask spreads among other factors.  As a result of the inability to use quoted market prices to determine fair value for these securities, the Company determined that fair value, as determined by level 3 inputs in the fair value hierarchy, is more appropriate for financial reporting and more consistent with the expected performance of the investments.  For the investments classified within level 3 of the fair value hierarchy, the Company used a discounted cash flow model to determine fair value.  Inputs in the model included both historical performance and expected future performance based on information currently available.

Assumptions used in the discounted cash flow model as of March 31, 2013 and December 31, 2012, were applied separately to those portions of the bond where the underlying residential mortgage loans had been performing under original contract terms for at least the prior 24 months and those where the underlying residential mortgages had not been meeting the original contractual obligation for the same period.  Unobservable inputs included in the model are estimates on future principal prepayment rates, and default and loss severity rates.  For that portion of the bond where the underlying residential mortgage had been meeting the original contract terms for at least 24 months, the Company used the following estimates in the model: (i) a voluntary prepayment rate of 7%, (ii) a 1% default rate, (iii) a loss severity rate of 25%, and (iv) a discount rate of 13%.  The assumptions used in the model for the rest of the bond included the following estimates:  (i) a voluntary prepayment rate of 2 %, (ii) a default rate of 4.5%, (iii) a loss severity rate that started at 60% for the first year (2012)  then declines by 5% for the following five years (2013, 2014, 2015, 2016 and 2017) and remains at 25% thereafter (2018 and beyond), and (iv) a discount rate of 13%.  The estimates used in the model to determine fair value are based on observable historical data of the underlying collateral.  The model anticipates that the housing market will gradually improve and that the underlying collateral will eventually all perform in accordance with the original contract terms on the bond.  Should the number of loans in the underlying collateral that default and go into foreclosure or the severity of the losses in the underlying collateral significantly change, the results of the model would be impacted.  The Company will continue to evaluate the actual historical performance of the underlying collateral and will modify the assumptions used in the model as necessary.

The following table presents a reconciliation of activity for such mortgage-backed securities on a net basis (Dollars in thousands):

Balance at December 31, 2012	$	32,860
Principal paydowns	(1,195		)
Total unrealized losses included in:
Other comprehensive income	(658		)
Impairment realized	(310		)
Balance at March 31, 2013	$	30,697

Certain financial assets and financial liabilities are measured at fair value on a nonrecurring basis.  The instruments 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 March 31, 2013 by level within the fair value measurement hierarchy:

			Fair Value Measurements at Reporting Date Using
			(in thousands)
	Assets/Liabilities Measured at Fair Value		Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs		Net Provision (Credit) During
	March 31, 2013		(Level 1)		(Level 2)		(Level 3)		Period
Measured on a non-recurring basis:
Assets:
Impaired loans	$	27,330	$	—	$	—	$	27,330	$	10,332
Other real estate owned	2,752		—		—		2,752		(70		)

The following table represents financial instruments measured at fair value on a non-recurring basis as of December 31, 2012 by level within the fair value measurement hierarchy:

			Fair Value Measurements at Reporting Date Using
			(in thousands)
	Assets/Liabilities Measured at Fair Value December 31,		Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs		Net Provision During the
	2012		(Level 1)		(Level 2)		(Level 3)		Period
Measured on a non-recurring basis:
Assets:
Impaired loans	$	11,981	$	—	$	—	$	11,981	$	295
Other real estate owned	18,749		—		—		18,749		—

The Company’s assets measured at fair value on a non-recurring basis are limited to impaired loans and other real estate owned.  Impaired loans are classified within level 3 of the valuation hierarchy.  The fair value of impaired loans is derived in accordance with FASB ASC 310, “Receivables”.  Impaired loans are primarily comprised of collateral-dependent commercial loans.   The fair value of impaired loans is based on the fair value of the collateral, as determined through an appraisal process.  The basis for the Company’s appraisal and appraisal review process is based on regulatory guidelines and strives to comply with all regulatory appraisal laws, regulations and the Uniform Standards of Professional Appraisal Practice.  Understanding that as the primary sources of loan repayments decline, the secondary repayment source comes into play and correctly evaluating the fair value of that secondary source, the collateral, becomes even more important.  New or updated appraisals may be obtained as warranted after evaluation of any material deterioration in the performance of the project, the conditions for the geographic area where the property is located, the property type, differences between the current property conditions and the conditions assumed in prior appraisals or evaluations, or changes in project specifications.  All appraisals and evaluations are “as is” (the property’s highest and best use) valuations based on the current conditions of the property/project at that point in time.  The determination of the fair value of the collateral is based on the net realizable value, which is the appraised value less any closing costs, when applicable.  Impaired loans are remeasured and reported at fair value through a specific valuation allowance allocation of the allowance for probable loan losses based upon the fair value of the underlying collateral.  As of March 31, 2013, the Company had $70,267,000 of impaired commercial collateral dependent loans, of which $50,579,000 had an appraisal or evaluation performed within the last twelve months.  As of December 31, 2012, the Company had $73,646,000 of impaired commercial collateral dependent loans, of which $48,856,000 had an appraisal or evaluation performed within the last twelve months.

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 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 three months ended March 31, 2013 and the twelve months ended December 31, 2012, respectively the Company recorded $61,000 and $10,450,000 in charges to the allowance for probable loan losses in connection with loans transferred to other real estate owned.  For the three months ended March 31, 2013 and twelve months ended December 31, 2012, respectively, the Company recorded $(70) and $0 in adjustments to fair value in connection with other real estate owned.

The fair value estimates, methods, and assumptions for the Company’s financial instruments at March 31, 2013 and December 31, 2012 are outlined below.

Cash and Due From Banks and Federal Funds Sold

For these short-term instruments, the carrying amount is a reasonable estimate of fair value.

Time Deposits with Banks

The carrying amounts of time deposits with banks approximate fair value.

Investment Securities Held-to-Maturity

The carrying amounts of investments held-to-maturity approximate fair value.

Investment Securities

For investment securities, which 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 6.

Loans

Fair values are estimated for portfolios of loans with similar financial characteristics.  Loans are segregated by type such as commercial, real estate and consumer loans as outlined by regulatory reporting guidelines.  Each category is segmented into fixed and variable interest rate terms and by performing and non-performing categories.

For variable rate performing loans, the carrying amount approximates the fair value.  For fixed rate performing loans, except residential mortgage loans, the fair value is calculated by discounting scheduled cash flows through the estimated maturity using estimated market discount rates that reflect the credit and interest rate risk inherent in the loan.  For performing residential mortgage loans, fair value is estimated by discounting contractual cash flows adjusted for prepayment estimates using discount rates based on secondary market sources or the primary origination market.  Fixed rate performing loans are within Level 3 of the fair value hierarchy.  At March 31, 2013, and December 31, 2012, the carrying amount of fixed rate performing loans was $1,175,326,000 and $1,189,585,000, respectively, and the estimated fair value was $1,122,036,000 and $1,126,228,000, 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 March 31, 2013 and December 31, 2012.  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 March 31, 2013 and December 31, 2012, the carrying amount of time deposits was $2,835,652,000 and $2,954,312,000, respectively, and the estimated fair value was $2,844,576,000 and $2,962,190,000, respectively.

Securities Sold Under Repurchase Agreements

Securities sold under repurchase agreements include both short and long-term maturities.  Due to the contractual terms of the short-term instruments, the carrying amounts approximated fair value at March 31, 2013 and December 31, 2012.  The fair value of the long-term instruments is based on established market spreads using option adjusted spread methodology.  Long-term repurchase agreements are within level 3 of the fair value hierarchy.  At March 31, 2013 and December 31, 2012, respectively, the carrying amount of long-term repurchase agreements was $730,000,000 and $800,000,000, respectively, and the estimated fair value was $842,507,000 and $932,007,000, respectively.

Junior Subordinated Deferrable Interest Debentures

The Company currently has 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 March 31, 2013 and December 31, 2012.

Other Borrowed Funds

The company currently has short and long-term borrowings issued from the Federal Home Loan Bank (“FHLB”).  Due to the contractual terms of the short-term borrowings, the carrying amounts approximated fair value at March 31, 2013 and December 31, 2012.  The fair value of the long-term borrowings is based on established market spreads for similar types of borrowings.  The long-term borrowings are included in Level 2 of the fair value hierarchy.  At March 31, 2013 and December 31, 2012, the carrying amount of the long-term FHLB borrowings was $6,493,000, and $6,527,000, respectively, and the estimated fair value was $7,011,000 and $7,073,000, 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 the Company’s entire holdings of a particular financial instrument.  Because no market exists for a significant portion of the Company’s 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.

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Fair Value Measurements (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Assets:
Available for sale securities	$ 5,180,274	$ 5,525,015
Measured on a recurring basis: | Assets/Liabilities Measured at Fair Value
Assets:
Available for sale securities	5,180,274	5,525,015
Measured on a recurring basis: | Assets/Liabilities Measured at Fair Value | Residential mortgage-backed securities
Assets:
Available for sale securities	4,923,211	5,265,204
Measured on a recurring basis: | Assets/Liabilities Measured at Fair Value | States and political subdivisions
Assets:
Available for sale securities	235,910	238,675
Measured on a recurring basis: | Assets/Liabilities Measured at Fair Value | Other
Assets:
Available for sale securities	21,153	21,136
Measured on a recurring basis: | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Available for sale securities	21,153	21,136
Measured on a recurring basis: | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other
Assets:
Available for sale securities	21,153	21,136
Measured on a recurring basis: | Significant Other Observable Inputs (Level 2)
Assets:
Available for sale securities	5,128,424	5,471,019
Measured on a recurring basis: | Significant Other Observable Inputs (Level 2) | Residential mortgage-backed securities
Assets:
Available for sale securities	4,892,514	5,232,344
Measured on a recurring basis: | Significant Other Observable Inputs (Level 2) | States and political subdivisions
Assets:
Available for sale securities	235,910	238,675
Measured on a recurring basis: | Significant Unobservable Inputs (Level 3)
Assets:
Available for sale securities	30,697	32,860
Measured on a recurring basis: | Significant Unobservable Inputs (Level 3) | Residential mortgage-backed securities
Assets:
Available for sale securities	$ 30,697	$ 32,860

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Stock Options (Details) (2012 Plan Stock Options, USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Apr. 05, 2012
Stock option details
Shares available for future grants	757,500		800,000
Maximum exercisable period for options granted	10 years
Stock option activity
Options outstanding at the beginning of the period (in shares)	794,877
Less:
Options exercised (in shares)	1,043
Options expired (in shares)	22,343
Options forfeited (in shares)	14,275
Options outstanding at the end of the period (in shares)	757,216
Options fully vested and exercisable at the end of the period (in shares)	382,186
Stock options, weighted average exercise price
Options outstanding at the beginning, weighted average exercise price (in dollars per share)	$ 19.03
Less:
Options exercised, weighted average exercise price (in dollars per share)	$ 11.54
Options expired, weighted average exercise price (in dollars per share)	$ 23.50
Options forfeited, weighted average exercise price (in dollars per share)	$ 17.15
Options outstanding at the end, weighted average exercise price (in dollars per share)	$ 18.95
Options fully vested and exercisable at the end, weighted average exercise price (in dollars per share)	$ 23.7
Stock options, weighted average remaining contractual term
Options outstanding at the end, weighted average remaining contractual term	3 years 7 months 17 days
Options fully vested and exercisable at the end, weighted average remaining contractual term	1 year 7 months 20 days
Stock options, aggregate intrinsic value
Options outstanding at the end, aggregate intrinsic value	$ 3,164,000
Options fully vested and exercisable at the end, aggregate intrinsic value	603,000
Stock-based compensation expense	114,000	131,000
Stock-based compensation cost, unrecognized, related to non-vested options	$ 1,043,000
Stock-based compensation cost, unrecognized, related to non-vested options, weighted-average period of recognition	1 year 10 months 24 days
Incentive stock options granted to 10% shareholders
Stock option details
Maximum exercisable period for options granted	5 years

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Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2013

Fair Value Measurements

Assets and liabilities measured at fair value on a recurring basis

The following table represents assets and liabilities reported on the consolidated balance sheets at their fair value as of March 31, 2013 by level within the fair value measurement hierarchy:

			Fair Value Measurements at Reporting Date Using
			(in thousands)
	Assets/Liabilities Measured at Fair Value		Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
	March 31, 2013		(Level 1)		(Level 2)		(Level 3)
Measured on a recurring basis:
Assets:
Available for sale securities
Residential mortgage-backed securities	$	4,923,211	$	—	$	4,892,514	$	30,697
States and political subdivisions	235,910		—		235,910		—
Other	21,153		21,153		—		—
	$	5,180,274	$	21,153	$	5,128,424	$	30,697

The following table represents assets and liabilities reported on the consolidated balance sheets at their fair value as of December 31, 2012 by level within the fair value measurement hierarchy:

			Fair Value Measurements at Reporting Date Using
			(in thousands)
	Assets/Liabilities Measured at Fair Value		Quoted Prices in Active Markets for Identical		Significant Other Observable		Significant Unobservable
	December 31, 2012		Assets (Level 1)		Inputs (Level 2)		Inputs (Level 3)
Measured on a recurring basis:
Assets:
Available for sale securities
Residential mortgage-backed securities	$	5,265,204	$	—	$	5,232,344	$	32,860
States and political subdivisions	238,675		—		238,675		—
Other	21,136		21,136		—		—
	$	5,525,015	$	21,136	$	5,471,019	$	32,860

Reconciliation of activity for mortgage-backed securities on a net basis

The following table presents a reconciliation of activity for such mortgage-backed securities on a net basis (Dollars in thousands):

Balance at December 31, 2012	$	32,860
Principal paydowns	(1,195		)
Total unrealized losses included in:
Other comprehensive income	(658		)
Impairment realized	(310		)
Balance at March 31, 2013	$	30,697

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 March 31, 2013 by level within the fair value measurement hierarchy:

			Fair Value Measurements at Reporting Date Using
			(in thousands)
	Assets/Liabilities Measured at Fair Value		Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs		Net Provision (Credit) During
	March 31, 2013		(Level 1)		(Level 2)		(Level 3)		Period
Measured on a non-recurring basis:
Assets:
Impaired loans	$	27,330	$	—	$	—	$	27,330	$	10,332
Other real estate owned	2,752		—		—		2,752		(70		)

The following table represents financial instruments measured at fair value on a non-recurring basis as of December 31, 2012 by level within the fair value measurement hierarchy:

			Fair Value Measurements at Reporting Date Using
			(in thousands)
	Assets/Liabilities Measured at Fair Value December 31,		Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs		Net Provision During the
	2012		(Level 1)		(Level 2)		(Level 3)		Period
Measured on a non-recurring basis:
Assets:
Impaired loans	$	11,981	$	—	$	—	$	11,981	$	295
Other real estate owned	18,749		—		—		18,749		—