10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF

THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2013

Commission file number 0-7674

FIRST FINANCIAL BANKSHARES, INC.

(Exact name of registrant as specified in its charter)

Texas	75-0944023
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
400 Pine Street, Abilene, Texas	79601
(Address of principal executive offices)	(Zip Code)

(325) 627-7155

(Registrant’s telephone number, including area code)

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  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulations 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  ¨

Indicate by check mark whether 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	¨
Non-accelerated filer	¨  (Do not check if a smaller reporting company)	Smaller reporting company	¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).    Yes  ¨    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	Outstanding at April 26, 2013
Common Stock, $0.01 par value per share	31,532,851

TABLE OF CONTENTS

PART I

FINANCIAL INFORMATION

Item		Page
1.	Financial Statements		1
Consolidated Balance Sheets—Unaudited			2
Consolidated Statements of Earnings—Unaudited			3
Consolidated Statements of Comprehensive Earnings—Unaudited			4
Consolidated Statements of Changes in Shareholders’ Equity—Unaudited			5
Consolidated Statements of Cash Flows—Unaudited			6
Notes to Consolidated Financial Statements—Unaudited			7
2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations		25
3.	Quantitative and Qualitative Disclosures About Market Risk		38
4.	Controls and Procedures		38
	PART II
	OTHER INFORMATION
1.	Legal Proceedings		40
1A.	Risk Factors		40
2.	Unregistered Sales of Equity Securities and Use of Proceeds		40
3.	Defaults Upon Senior Securities		40
4.	Mine Safety Disclosures		40
5.	Other Information		40
6.	Exhibits		41
	Signatures		42

PART I

FINANCIAL INFORMATION

Item 1. Financial Statements.

The consolidated balance sheets of First Financial Bankshares, Inc. (the “Company”) at March 31, 2013 and 2012 and December 31, 2012, and the consolidated statements of earnings, comprehensive earnings, changes in shareholders’ equity and cash flows for the three months ended March 31, 2013 and 2012, follow on pages 2 through 6.

1

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

(Dollars in thousands, except per share amounts)

	March 31,						December 31,
	2013			2012			2012
	(Unaudited)
ASSETS
CASH AND DUE FROM BANKS	$	113,958		$	131,163		$	207,018
FEDERAL FUNDS SOLD		3,175			11,200			14,045
INTEREST-BEARING DEPOSITS IN BANKS		20,065			84,169			139,676
Total cash and cash equivalents		137,198			226,532			360,739
INTEREST-BEARING TIME DEPOSITS IN BANKS		45,172			62,018			49,005
SECURITIES AVAILABLE-FOR-SALE, at fair value		1,958,151			1,960,760			1,819,035
SECURITIES HELD-TO-MATURITY (fair value of $920, $2,612 and $1,080 at March 31, 2013 and 2012 and December 31, 2012, respectively)		903			2,581			1,061
LOANS
Held for investment		2,128,015			1,793,172			2,077,166
Less - allowance for loan losses		(34,672	)		(34,529	)		(34,839	)
Net loans held for investment		2,093,343			1,758,643			2,042,327
Held for sale		10,122			5,695			11,457
Net loans		2,103,465			1,764,338			2,053,784
BANK PREMISES AND EQUIPMENT, net		86,265			79,308			84,122
INTANGIBLE ASSETS		71,963			72,078			71,973
OTHER ASSETS		52,863			59,635			62,293
Total assets	$	4,455,980		$	4,227,250		$	4,502,012
LIABILITIES AND SHAREHOLDERS’ EQUITY
NONINTEREST-BEARING DEPOSITS	$	1,237,840		$	1,125,577		$	1,311,708
INTEREST-BEARING DEPOSITS		2,312,286			2,272,495			2,320,876
Total deposits		3,550,126			3,398,072			3,632,584
DIVIDENDS PAYABLE		7,879			7,553			—
SHORT-TERM BORROWINGS		263,345			237,567			259,697
OTHER LIABILITIES		70,378			67,053			52,768
Total liabilities		3,891,728			3,710,245			3,945,049
COMMITMENTS AND CONTINGENCIES
SHAREHOLDERS’ EQUITY
Common stock - $0.01 par value, authorized 80,000,000 shares; 31,519,973, 31,477,483, and 31,496,881 shares issued at March 31, 2013 and 2012 and December 31, 2012, respectively		315			315			315
Capital surplus		278,122			276,623			277,412
Retained earnings		238,625			195,074			227,927
Treasury stock (shares at cost: 268,348, 261,454, and 266,845 at March 31, 2013 and 2012 and December 31, 2012, respectively)		(5,138	)		(4,712	)		(5,007	)
Deferred compensation		5,138			4,712			5,007
Accumulated other comprehensive earnings		47,190			44,993			51,309
Total shareholders’ equity		564,252			517,005			556,963
Total liabilities and shareholders’ equity	$	4,455,980		$	4,227,250		$	4,502,012

See notes to consolidated financial statements.

2

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF EARNINGS—(UNAUDITED)

(Dollars in thousands, except per share amounts)

	Three Months Ended March 31,
	2013			2012
INTEREST INCOME:
Interest and fees on loans	$	26,445		$	24,640
Interest on investment securities:
Taxable		6,375			8,804
Exempt from federal income tax		6,579			6,141
Interest on federal funds sold and interest-bearing deposits in banks		176			212
Total interest income		39,575			39,797
INTEREST EXPENSE:
Interest on deposits		867			1,482
Other		37			58
Total interest expense		904			1,540
Net interest income		38,671			38,257
PROVISION FOR LOAN LOSSES		401			1,296
Net interest income after provision for loan losses		38,270			36,961
NONINTEREST INCOME:
Trust fees		3,793			3,454
Service charges on deposit accounts		3,895			3,882
ATM, interchange and credit card fees		3,729			3,676
Real estate mortgage operations		1,384			1,050
Net gain on available-for-sale securities (includes $222 and $346 for the three months ended March 31, 2013 and 2012, respectively, related to accumulated other comprehensive earnings reclassifications)		222			346
Net gain (loss) on sale of foreclosed assets		(316	)		6
Other		1,253			884
Total noninterest income		13,960			13,298
NONINTEREST EXPENSE:
Salaries and employee benefits		15,180			14,229
Net occupancy expense		1,766			1,737
Equipment expense		2,281			2,108
FDIC insurance premiums		572			527
ATM, interchange and credit card expenses		1,340			1,249
Professional and service fees		803			737
Printing, stationery and supplies		472			505
Amortization of intangible assets		10			44
Other		5,047			5,332
Total noninterest expense		27,471			26,468
EARNINGS BEFORE INCOME TAXES		24,759			23,791
INCOME TAX EXPENSE (includes $78 and $121 for the three months ended March 31, 2013 and 2012, respectively, related to income tax expense from reclassification items)		6,182			6,035
NET EARNINGS	$	18,577		$	17,756
EARNINGS PER SHARE, BASIC	$	0.59		$	0.56
EARNINGS PER SHARE, ASSUMING DILUTION	$	0.59		$	0.56
DIVIDENDS PER SHARE	$	0.25		$	0.24

See notes to consolidated financial statements.

3

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF COMPREHENSIVE EARNINGS—(UNAUDITED)

(Dollars in thousands)

	Three Months Ended March 31,
	2013			2012
NET EARNINGS	$	18,577		$	17,756
OTHER ITEMS OF COMPREHENSIVE EARNINGS:
Change in unrealized gain on investment securities available-for-sale, before income taxes		(6,115	)		(3,088	)
Reclassification adjustment for realized gains on investment securities included in net earnings, before income tax		(222	)		(346	)
Total other items of comprehensive earnings		(6,337	)		(3,434	)
Income tax expense related to other items of comprehensive earnings		2,218			1,202
COMPREHENSIVE EARNINGS	$	14,458		$	15,524

See notes to consolidated financial statements.

4

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS’ EQUITY

(Dollars in thousands, except per share amounts)

	Common Stock				Capital Surplus		Retained Earnings			Treasury Stock						Deferred Compensation		Accumulated Other Comprehensive Earnings			Total Shareholders’ Equity
	Shares		Amount							Shares			Amounts
Balances at December 31, 2011		31,459,635	$	314	$	276,127	$	184,871			(258,235	)	$	(4,597	)	$	4,597	$	47,225		$	508,537
Net earnings (unaudited)		—		—		—		17,756			—			—			—		—			17,756
Stock issuances (unaudited)		17,848		1		398		—			—			—			—		—			399
Cash dividends declared, $0.24 per share (unaudited)		—		—		—		(7,553	)		—			—			—		—			(7,553	)
Change in unrealized gain in investment securities available-for-sale, net of related income taxes (unaudited)		—		—		—		—			—			—			—		(2,232	)		(2,232	)
Additional tax benefit related to directors’ deferred compensation plan (unaudited)		—		—		10		—			—			—			—		—			10
Shares purchased in connection with directors’ deferred compensation plan, net (unaudited)		—		—		—		—			(3,219	)		(115	)		115		—			—
Stock option expense (unaudited)		—		—		88		—			—			—			—		—			88
Balances at March 31, 2012 (unaudited)		31,477,483	$	315	$	276,623	$	195,074			(261,454	)	$	(4,712	)	$	4,712	$	44,993		$	517,005
Balances at December 31, 2012		31,496,881	$	315	$	277,412	$	227,927			(266,845	)	$	(5,007	)	$	5,007	$	51,309		$	556,963
Net earnings (unaudited)		—		—		—		18,577			—			—			—		—			18,577
Stock issuances (unaudited)		23,092		—		612		—			—			—			—		—			612
Cash dividends declared, $0.25 per share (unaudited)		—		—		—		(7,879	)		—			—			—		—			(7,879	)
Change in unrealized gain in investment securities available-for-sale, net of related income taxes (unaudited)		—		—		—		—			—			—			—		(4,119	)		(4,119	)
Additional tax benefit related to directors’ deferred compensation plan (unaudited)		—		—		10		—			—			—			—		—			10
Shares purchased in connection with directors’ deferred compensation plan, net (unaudited)		—		—		—		—			(1,503	)		(131	)		131		—			—
Stock option expense (unaudited)		—		—		88		—			—			—			—		—			88
Balances at March 31, 2013 (unaudited)		31,519,973	$	315	$	278,122	$	238,625			(268,348	)	$	(5,138	)	$	5,138	$	47,190		$	564,252

See notes to consolidated financial statements.

5

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS—(UNAUDITED)

(Dollars in thousands)

	Three Months Ended March 31,
	2013			2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Net earnings	$	18,577		$	17,756
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization		2,007			1,887
Provision for loan losses		401			1,296
Securities premium amortization (discount accretion), net		4,208			3,610
Gain on sale of assets, net		(74	)		(474	)
Deferred federal income tax expense (benefit)		—			(4	)
Change in loans held for sale		1,334			4,934
Change in other assets		8,732			1,842
Change in other liabilities		7,440			5,897
Total adjustments		24,048			18,988
Net cash provided by operating activities		42,625			36,744
CASH FLOWS FROM INVESTING ACTIVITIES:
Net decrease (increase) in interest-bearing time deposits in banks		3,833			(843	)
Activity in available-for-sale securities:
Sales		5,227			21,003
Maturities		94,803			76,390
Purchases		(236,984	)		(222,889	)
Activity in held-to-maturity securities—maturities		158			1,028
Net increase in loans		(51,454	)		(18,162	)
Purchases of bank premises and equipment and other assets		(4,567	)		(5,063	)
Proceeds from sale of other assets		1,015			1,555
Net cash used in investing activities		(187,969	)		(146,981	)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase (decrease) in noninterest-bearing deposits		(73,868	)		24,001
Net increase (decrease) in interest-bearing deposits		(8,590	)		39,272
Net increase in short-term borrowings		3,648			29,811
Common stock transactions:
Proceeds from stock issuances		613			399
Dividends paid		—			(7,550	)
Net cash provided by (used in) financing activities		(78,197	)		85,933
NET DECREASE IN CASH AND CASH EQUIVALENTS		(223,541	)		(24,304	)
CASH AND CASH EQUIVALENTS, beginning of period		360,739			250,836
CASH AND CASH EQUIVALENTS, end of period	$	137,198		$	226,532
SUPPLEMENTAL INFORMATION AND NONCASH TRANSACTIONS
Interest paid	$	953		$	1,653
Federal income tax paid		—			—
Transfer of loans to foreclosed assets		39			82
Investment securities purchased but not settled		21,095			21,895

See notes to consolidated financial statements.

6

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

Note 1—Basis of Presentation

The interim consolidated financial statements include the accounts of the Company, a Texas corporation and a financial holding company registered under the Bank Holding Company Act of 1956, as amended, or BHCA, and its wholly-owned subsidiaries: First Financial Bank, National Association, Abilene, Texas; First Technology Services, Inc.; First Financial Trust & Asset Management Company, National Association; First Financial Investments, Inc.; and First Financial Insurance Agency, Inc.

Through our subsidiary bank, we conduct full-service commercial banking business. Our banking centers are located primarily in Central, North Central and West Texas. As of March 31, 2013, we had 56 financial centers across Texas, with eleven locations in Abilene, two locations in Cleburne, two locations in Stephenville, two locations in Granbury, three locations in San Angelo, three locations in Weatherford, and one location each in Mineral Wells, Hereford, Sweetwater, Eastland, Ranger, Rising Star, Cisco, Southlake, Grapevine, Aledo, Willow Park, Brock, Alvarado, Burleson, Keller, Trophy Club, Boyd, Bridgeport, Decatur, Roby, Trent, Merkel, Clyde, Moran, Albany, Midlothian, Crowley, Glen Rose, Odessa, Waxahachie, Acton, Fort Worth and Huntsville. Our trust subsidiary has six locations which consist of Abilene, San Angelo, Stephenville, Sweetwater, Fort Worth and Odessa, all in Texas.

In the opinion of management, the unaudited interim consolidated financial statements reflect all adjustments necessary for a fair presentation of the Company’s financial position and unaudited results of operations and should be read in conjunction with the Company’s audited consolidated financial statements, and notes thereto in the Company’s Annual Report on Form 10-K, for the year ended December 31, 2012. All adjustments were of a normal recurring nature. However, the results of operations for the three months ended March 31, 2013, are not necessarily indicative of the results to be expected for the year ending December 31, 2013, due to seasonality, changes in economic conditions and loan credit quality, interest rate fluctuations, regulatory and legislative changes and other factors. Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States have been condensed or omitted under SEC rules and regulations. The Company evaluated subsequent events for potential recognition and/or disclosure through the date the consolidated financial statements were issued.

Effective December 30, 2012, the Company consolidated its eleven bank charters into one charter. The Company cited regulatory, compliance and technology complexities and the opportunity for cost savings as its reason for making this change. The Company noted it expects to operate the one charter as it previously did with eleven charters with local management and board decisions to benefit the customers and communities it serves.

On October 26, 2011, the Company’s Board of Directors authorized the repurchase of up to 750,000 common shares through September 30, 2014. The stock buyback plan authorizes management to repurchase the stock at such time as repurchases are considered beneficial to shareholders. Any repurchase of stock will be made through the open market, block trades or in privately negotiated transactions in accordance with applicable laws and regulations. Under the repurchase plan, there is no minimum number of shares that the Company is required to repurchase. Through March 31, 2013, no shares have been repurchased under this authorization.

On April 24, 2012, the Company’s shareholders approved an amendment to the Company’s Amended and Restated Certificate of Formation to increase the number of authorized common shares to 80,000,000.

Goodwill and other intangible assets are evaluated annually for impairment as of the end of the second quarter. No such impairment has been noted in connection with the current or any prior evaluations.

7

Note 2—Earnings Per Share

Basic earnings per common share is computed by dividing net income available to common shareholders by the weighted average number of shares outstanding during the periods presented. In computing diluted earnings per common share for the three months ended March 31, 2013 and 2012, the Company assumes that all dilutive outstanding options to purchase common stock have been exercised at the beginning of the period (or the time of issuance, if later). The dilutive effect of the outstanding options is reflected by application of the treasury stock method, whereby the proceeds from the exercised options are assumed to be used to purchase common stock at the average market price during the respective periods. The weighted average common shares outstanding used in computing basic earnings per common share for the three months ended March 31, 2013 and 2012, were 31,507,975 and 31,466,706 shares, respectively. The weighted average common shares outstanding used in computing fully diluted earnings per common share for the three months ended March 31, 2013 and 2012, were 31,601,364 and 31,479,743 respectively.

Note 3 – Interest-bearing Time Deposits in Banks and Securities

Interest-bearing time deposits in banks totaled $45,172,000 and $49,005,000 at March 31, 2013 and December 31, 2012, respectively, and have original maturities generally ranging from one to two years. Of these amounts, $40,943,000 and $44,776,000 are time deposits with balances greater than $100,000 at March 31, 2013 and December 31, 2012, respectively.

The Company records its available-for-sale and trading securities portfolio at fair value.

Management classifies debt and equity securities as held-to-maturity, available-for-sale, or trading based on its intent. Debt securities that management has the positive intent and ability to hold to maturity are classified as held-to-maturity and recorded at cost, adjusted for amortization of premiums and accretion of discounts, which are recognized as adjustments to interest income using the interest method. Securities not classified as held-to-maturity or trading are classified as available-for-sale and recorded at estimated fair value, with all unrealized gains and unrealized losses judged to be temporary, net of deferred income taxes, excluded from earnings and reported in the consolidated statements of comprehensive earnings. Available-for-sale securities that have unrealized losses that are judged other than temporary are included in gain (loss) on sale of securities and a new cost basis is established. Securities classified as trading are recorded at estimated fair value with unrealized gains and losses included in earnings.

Fair values of these securities are determined based on methodologies in accordance with current authoritative accounting guidance. Fair values are volatile and may be influenced by a number of factors, including market interest rates, prepayment speeds, discount rates, credit ratings and yield curves. Fair values for investment securities are based on quoted market prices, where available. If quoted market prices are not available, fair values are based on the quoted prices of similar instruments or an estimate of fair value by using a range of fair value estimates in the market place as a result of the illiquid market specific to the type of security.

When the fair value of a security is below its amortized cost, and depending on the length of time the condition exists and the extent the fair value is below amortized cost, additional analysis is performed to determine whether an other-than-temporary impairment condition exists. Available-for-sale and held-to-maturity securities are analyzed quarterly for possible other-than-temporary impairment. The analysis considers (i) whether we have the intent to sell our securities prior to recovery and/or maturity, (ii) whether it is more likely than not that we will have to sell our securities prior to recovery and/or maturity, (iii) the length of time and extent to which the fair value has been less than costs, and (iv) the financial condition of the issuer. Often, the information available to conduct these assessments is limited and rapidly changing, making estimates of fair value subject to judgment. If actual information or conditions are different than estimated, the extent of the impairment of the security may be different than previously estimated, which could have a material effect on the Company’s results of operations and financial condition.

8

The Company’s investment portfolio consists of traditional investments, substantially all in U.S. Treasury securities, obligations of U.S. government sponsored-enterprises and agencies, mortgage pass-through securities, corporate bonds and general obligation or revenue based municipal bonds. Pricing for such securities is generally readily available and transparent in the market. The Company utilizes independent third party pricing services to assist in valuing its investment securities. The Company reviews the prices supplied by the independent pricing services as well as the underlying pricing methodologies for reasonableness and to ensure such prices are aligned with traditional pricing matrices. The Company validates quarterly, on a sample basis, prices supplied by the independent pricing services by comparison to prices obtained from other third party sources.

A summary of available-for-sale and held-to-maturity securities follows (in thousands):

	March 31, 2013
	Amortized Cost Basis		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses			Estimated Fair Value
Securities available-for-sale:
U.S. Treasury securities	$	6,017	$	23	$	—		$	6,040
Obligations of U.S. government sponsored-enterprises and agencies		189,913		3,451		—			193,364
Obligations of states and political subdivisions		865,282		53,191		(558	)		917,915
Corporate bonds and other		111,669		5,553		—			117,222
Residential mortgage-backed securities		592,911		23,866		(213	)		616,564
Commercial mortgage-backed securities		106,898		1,408		(1,260	)		107,046
Total securities available-for-sale	$	1,872,690	$	87,492	$	(2,031	)	$	1,958,151
Securities held-to-maturity:
Obligations of states and political subdivisions	$	595	$	5	$	—		$	600
Residential mortgage-backed securities		308		12		—			320
Total debt securities held-to-maturity	$	903	$	17	$	—		$	920

9

	December 31, 2012
	Amortized Cost Basis		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses			Estimated Fair Value
Securities available-for-sale:
U.S. Treasury securities	$	6,042	$	48	$	—		$	6,090
Obligations of U.S. government sponsored-enterprises and agencies		219,420		4,060		—			223,480
Obligations of states and political subdivisions		786,278		57,541		(129	)		843,690
Corporate bonds and other		117,244		6,020		(73	)		123,191
Residential mortgage-backed securities		564,434		23,285		(443	)		587,276
Commercial mortgage-backed securities		33,819		1,739		(250	)		35,308
Total securities available-for-sale	$	1,727,237	$	92,693	$	(895	)	$	1,819,035
Securities held-to-maturity:
Obligations of states and political subdivisions	$	735	$	7	$	—		$	742
Residential mortgage-backed securities		294		11		—			305
Commercial mortgage-backed securities		32		1		—			33
Total debt securities held-to-maturity	$	1,061	$	19	$	—		$	1,080

The Company invests in mortgage-backed securities that have expected maturities that differ from their contractual maturities. These differences arise because borrowers may have the right to call or prepay obligations with or without a prepayment penalty. These securities include collateralized mortgage obligations (CMOs) and other asset backed securities. The expected maturities of these securities at March 31, 2013, were computed by using scheduled amortization of balances and historical prepayment rates. At March 31, 2013 and December 31, 2012, the Company did not hold any CMOs that entail higher risks than standard mortgage-backed securities.

The amortized cost and estimated fair value of debt securities at March 31, 2013, by contractual and expected maturity, are shown below (in thousands):

	Available-for-Sale				Held-to-Maturity
	Amortized Cost Basis		Estimated Fair Value		Amortized Cost Basis		Estimated Fair Value
Due within one year	$	142,205	$	144,366	$	595	$	600
Due after one year through five years		509,641		532,461		—		—
Due after five years through ten years		495,789		530,064		—		—
Due after ten years		25,246		27,650		—		—
Mortgage-backed securities		699,809		723,610		308		320
Total	$	1,872,690	$	1,958,151	$	903	$	920

10

The following tables disclose, as of March 31, 2013 and December 31, 2012, the Company’s investment securities that have been in a continuous unrealized-loss position for less than 12 months and for 12 months or longer (in thousands):

	Less than 12 Months				12 Months or Longer				Total
March 31, 2013	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Obligations of states and political subdivisions	$	42,102	$	558	$	—	$	—	$	42,102	$	558
Residential mortgage-backed securities		8,664		9		14,885		204		23,549		213
Commercial mortgage-backed securities		38,472		1,260		—		—		38,472		1,260
Total	$	89,238	$	1,827	$	14,885	$	204	$	104,123	$	2,031
	Less than 12 Months				12 Months or Longer				Total
December 31, 2012	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Obligations of states and political subdivisions	$	36,480	$	129	$	—	$	—	$	36,480	$	129
Residential mortgage-backed securities		17,344		401		3,574		42		20,918		443
Commercial mortgage-backed securities		12,453		250		—		—		12,453		250
Corporate bonds and other		4,994		73		—		—		4,994		73
Total	$	71,271	$	853	$	3,574	$	42	$	74,845	$	895

The number of investment positions in an unrealized loss position totaled 108 at March 31, 2013. We do not believe these unrealized losses are “other than temporary” as (i) we do not have the intent to sell our securities prior to recovery and/or maturity and (ii) it is more likely than not that we will not have to sell our securities prior to recovery and/or maturity. In making the determination, we also consider the length of time and extent to which fair value has been less than cost and the financial condition of the issuer. The unrealized losses noted are interest rate related due to the level of interest rates at March 31, 2013 compared to the time of purchase. We have reviewed the ratings of the issuers and have not identified any issues related to the ultimate repayment of principal as a result of credit concerns on these securities. Our mortgage related securities are backed by GNMA, FNMA and FHLMC or are collateralized by securities backed by these agencies.

Securities, carried at approximately $870,328,000 at March 31, 2013, were pledged as collateral for public or trust fund deposits, repurchase agreements and for other purposes required or permitted by law.

During the quarter ended March 31, 2013 and 2012, sales of investment securities that were classified as available-for-sale totaled $5,227,000 and $21,003,000, respectively. Gross realized gains from securities sales and calls during the first quarter of 2013 and 2012 totaled $223,000 and $346,000, respectively. Gross realized losses from securities sales and calls during the first quarter of 2013 totaled $1,000. There were no losses realized on securities sales and calls during the first quarter of 2012. The specific identification method was used to determine cost in order to compute the realized gains and losses.

11

Note 4 –Loans and Allowance for Loan Losses

Loans held for investment are stated at the amount of unpaid principal, reduced by unearned income and an allowance for loan losses. Interest on loans is calculated by using the simple interest method on daily balances of the principal amounts outstanding. The Company defers and amortizes net loan origination fees and costs as an adjustment to yield. The allowance for loan losses is established through a provision for loan losses charged to expense. Loans are charged against the allowance for loan losses when management believes the collectability of the principal is unlikely.

The Company has certain lending policies and procedures in place that are designed to maximize loan income with an acceptable level of risk. Management reviews and approves these policies and procedures on a regular basis and makes changes as appropriate. Management receives and reviews frequent reports related to loan originations, quality, concentrations, delinquencies, non-performing and potential problem loans. Diversification in the loan portfolio is a means of managing risk associated with fluctuations in economic conditions, both by type of loan and geographic location.

Commercial loans are underwritten after evaluating and understanding the borrower’s ability to operate profitably and effectively. Underwriting standards are designed to determine whether the borrower possesses sound business ethics and practices and to evaluate current and projected cash flows to determine the ability of the borrower to repay their obligations as agreed. Commercial loans are primarily made based on the identified cash flows of the borrower and, secondarily, on the underlying collateral provided by the borrower. Most commercial loans are secured by the assets being financed or other business assets, such as accounts receivable or inventory and include personal guarantees.

Agricultural loans are subject to underwriting standards and processes similar to commercial loans. These agricultural loans are based primarily on the identified cash flows of the borrower and secondarily on the underlying collateral provided by the borrower. Most agricultural loans are secured by the agriculture related assets being financed, such as farm land, cattle or equipment and include personal guarantees.

Real estate loans are also subject to underwriting standards and processes similar to commercial and agricultural loans. These loans are underwritten primarily based on projected cash flows and, secondarily, as loans secured by real estate. The repayment of real estate loans is generally largely dependent on the successful operation of the property securing the loans or the business conducted on the property securing the loan. Real estate loans may be more adversely affected by conditions in the real estate markets or in the general economy. The properties securing the Company’s real estate portfolio are generally diverse in terms of type and geographic location. This diversity helps reduce the exposure to adverse economic events that affect any single market or industry. Generally, real estate loans are owner occupied which further reduces the Company’s risk.

Consumer loan underwriting utilizes methodical credit standards and analysis to supplement the Company’s underwriting policies and procedures. The Company’s loan policy addresses types of consumer loans that may be originated and the collateral, if secured, which must be perfected. The relatively smaller individual dollar amounts of consumer loans that are spread over numerous individual borrowers also minimize the Company’s risk.

12

The allowance is an amount management believes is appropriate to absorb probable losses that have been incurred on existing loans as of the balance sheet date based upon management’s review and evaluation of the loan portfolio. The allowance for loan losses is comprised of three elements: (i) specific reserves determined in accordance with current authoritative accounting guidance based on probable losses on specific classified loans; (ii) general reserve determined in accordance with current authoritative accounting guidance that considers historical loss rates; and (iii) qualitative reserves determined in accordance with current authoritative accounting guidance based upon general economic conditions and other qualitative risk factors both internal and external to the Company. The allowance for loan losses is increased by charges to income and decreased by charge-offs (net of recoveries). Management’s periodic evaluation of the appropriateness of the allowance is based on general economic conditions, the financial condition of borrowers, the value and liquidity of collateral, delinquency, prior loan loss experience, and the results of periodic reviews of the portfolio. For purposes of determining our general reserve, the loan portfolio, less cash secured loans, government guaranteed loans and classified loans, is multiplied by the Company’s historical loss rate. Our methodology is constructed so that specific allocations are increased in accordance with deterioration in credit quality and a corresponding increase in risk of loss on a particular loan. In addition, we adjust our allowance for qualitative factors such as current local economic conditions and trends, including, without limitations, unemployment, changes in lending staff, policies and procedures, changes in credit concentrations, changes in the trends and severity of problem loans and changes in trends in volume and terms of loans. This additional allocation based on qualitative factors serves to compensate for additional areas of uncertainty inherent in our portfolio that are not reflected in our historic loss factors.

Although we believe we use the best information available to make loan loss allowance determinations, future adjustments could be necessary if circumstances or economic conditions differ substantially from the assumptions used in making our initial determinations. A further downturn in the economy and employment could result in increased levels of non-performing assets and charge-offs, increased loan provisions and reductions in income. Additionally, bank regulatory agencies periodically review our allowance for loan losses and could require additions to the loan loss allowance based on their judgment of information available to them at the time of their examination.

Accrual of interest is discontinued on a loan and payments are applied to principal when management believes, after considering economic and business conditions and collection efforts, the borrower’s financial condition is such that collection of interest is doubtful. Except consumer loans, generally all loans past due greater than 90 days, based on contractual terms, are placed on non-accrual. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured. Consumer loans are generally charged-off when a loan becomes past due 90 days. For other loans in the portfolio, facts and circumstances are evaluated in making charge-off decisions.

Loans are considered impaired when, based on current information and events, management determines that it is probable we will be unable to collect all amounts due in accordance with the original contractual terms of the loan agreement, including scheduled principal and interest payments. If a loan is impaired, a specific valuation allowance is allocated, if necessary. Interest payments on impaired loans are typically applied to principal unless collectability of the principal amount is reasonably assured, in which case interest is recognized on a cash basis. Impaired loans, or portions thereof, are charged off when deemed uncollectable.

The Company’s policy requires measurement of the allowance for an impaired, collateral dependent loan based on the fair value of the collateral. Other loan impairments are measured based on the present value of expected future cash flows or the loan’s observable market price. At March 31, 2013 and 2012, and December 31, 2012, all significant impaired loans have been determined to be collateral dependent and the allowance for loss has been measured utilizing the estimated fair value of the collateral.

13

From time to time, the Company modifies its loan agreement with a borrower. A modified loan is considered a troubled debt restructuring when two conditions are met: (i) the borrower is experiencing financial difficulty and (ii) concessions are made by the Company that would not otherwise be considered for a borrower with similar credit risk characteristics. Modifications to loan terms may include a lower interest rate, a reduction of principal, or a longer term to maturity. To date, these troubled debt restructurings have been such that, after considering economic and business conditions and collection efforts, the collection of interest is doubtful and therefore the loan has been placed on non-accrual. Each of these loans is evaluated for impairment and a specific reserve is recorded based on probable losses, taking into consideration the related collateral and modified loan terms and cash flow. As of March 31, 2013 and 2012, and December 31, 2012, all of the Company’s troubled debt restructured loans are included in the non-accrual totals.

The Company originates certain mortgage loans for sale in the secondary market. Accordingly, these loans are classified as held for sale and are carried at the lower of cost or fair value on an aggregate basis. Loans held for sale totaled $10,122,000, $5,695,000 and $11,457,000, at March 31, 2013 and 2012 and December 31, 2012, respectively, in which the carrying amounts approximate fair value. The mortgage loan sales contracts contain indemnification clauses should the loans default, generally in the first three to six months, or if documentation is determined not to be in compliance with regulations. The Company’s historic losses as a result of these indemnities have been insignificant.

Major classifications of loans held for investment are as follows (in thousands):

	March 31,				December 31, 2012
	2013		2012
Commercial	$	513,422	$	433,351	$	509,609
Agricultural		55,247		57,977		68,306
Real estate		1,275,564		1,083,244		1,226,823
Consumer		283,782		218,600		272,428
Total loans held for investment	$	2,128,015	$	1,793,172	$	2,077,166

The Company’s non-accrual loans, loans still accruing and past due 90 days or more and restructured loans are as follows (in thousands):

	March 31,				December 31, 2012
	2013		2012
Non-accrual loans	$	22,509	$	20,963	$	21,800
Loans still accruing and past due 90 days or more		24		53		97
Restructured loans*		—		—		—
Total	$	22,533	$	21,016	$	21,897

* Restructured loans whose interest collection, after considering economic and business conditions and collection efforts, is doubtful are included in non-accrual loans.

14

The Company’s recorded investment in impaired loans and the related valuation allowance are as follows (in thousands):

March 31, 2013		March 31, 2012		December 31, 2012
Recorded Investment	Valuation Allowance	Recorded Investment	Valuation Allowance	Recorded Investment	Valuation Allowance
$ 22,509	$5,793	$20,963	$5,357	$21,800	$6,010

The average recorded investment in impaired loans for the three months ended March 31, 2013 and 2012 and the year ended December 31, 2012 was approximately $23,163,000, $21,957,000 and $24,025,000, respectively. The Company had $25,718,000, $28,868,000 and $25,462,000 in non-accrual, past due 90 days still accruing and restructured loans and foreclosed assets at March 31, 2013 and 2012, and December 31, 2012, respectively. Non-accrual loans totaled $22,509,000, $20,963,000 and $21,800,000, respectively, and consisted of the following amounts by type (in thousands):

	March 31,				December 31, 2012
	2013		2012
Commercial	$	1,133	$	3,665	$	2,251
Agricultural		473		923		372
Real estate		20,502		16,026		18,698
Consumer		401		349		479
Total	$	22,509	$	20,963	$	21,800

No additional funds are committed to be advanced in connection with impaired loans.

The Company’s impaired loans and related allowance as of March 31, 2013 and 2012, and December 31, 2012, are summarized in the following table (in thousands). No interest income was recognized on impaired loans subsequent to their classification as impaired.

March 31, 2013	Unpaid Contractual Principal Balance		Recorded Investment With No Allowance		Recorded Investment With Allowance		Total Recorded Investment		Related Allowance		Three-month Average Recorded Investment
Commercial	$	1,555	$	25	$	1,108	$	1,133	$	555	$	1,232
Agricultural		489		25		448		473		169		483
Real Estate		24,937		1,956		18,546		20,502		4,901		21,028
Consumer		466		77		324		401		168		420
Total	$	27,447	$	2,083	$	20,426	$	22,509	$	5,793	$	23,163

March 31, 2012	Unpaid Contractual Principal Balance		Recorded Investment With No Allowance		Recorded Investment With Allowance		Total Recorded Investment		Related Allowance		Three-month Average Recorded Investment
Commercial	$	4,218	$	24	$	3,641	$	3,665	$	1,990	$	3,817
Agricultural		948		—		923		923		170		922
Real Estate		20,058		3,470		12,556		16,026		3,082		16,838
Consumer		414		55		294		349		115		380
Total	$	25,638	$	3,549	$	17,414	$	20,963	$	5,357	$	21,957

December 31, 2012	Unpaid Contractual Principal Balance		Recorded Investment With No Allowance		Recorded Investment With Allowance		Total Recorded Investment		Related Allowance		Year-to-Date Average Recorded Investment
Commercial	$	2,677	$	20	$	2,231	$	2,251	$	1,350	$	2,966
Agricultural		381		—		372		372		131		437
Real Estate		22,569		2,049		16,649		18,698		4,356		20,164
Consumer		543		115		364		479		173		458
Total	$	26,170	$	2,184	$	19,616	$	21,800	$	6,010	$	24,025

15

The Company recognized interest income on impaired loans prior to being recognized as impaired of approximately $384,000 during the year ended December 31, 2012. Such amounts for the three-month period ended March 31, 2013 and 2012 were not significant.

From a credit risk standpoint, the Company classifies its loans in one of four categories: (i) pass, (ii) special mention, (iii) substandard, or (iv) doubtful. Loans classified as loss are charged-off.

The classifications of loans reflect a judgment about the risks of default and loss associated with the loan. The Company reviews the ratings on our credits as part of our on-going monitoring of the credit quality of our loan portfolio. Ratings are adjusted to reflect the degree of risk and loss that are felt to be inherent in each credit as of each monthly reporting period. Our methodology is structured so that specific allocations are increased in accordance with deterioration in credit quality (and a corresponding increase in risk and loss) or decreased in accordance with improvement in credit quality (and a corresponding decrease in risk and loss).

Credits rated special mention show clear signs of financial weaknesses or deterioration in credit worthiness, however, such concerns are not so pronounced that the Company generally expects to experience significant loss within the short-term. Such credits typically maintain the ability to perform within standard credit terms and credit exposure is not as prominent as credits rated more harshly.

Credits rated substandard are those in which the normal repayment of principal and interest may be, or has been, jeopardized by reason of adverse trends or developments of a financial, managerial, economic or political nature, or important weaknesses exist in collateral. A protracted workout on these credits is a distinct possibility. Prompt corrective action is therefore required to strengthen the Company’s position, and/or to reduce exposure and to assure that adequate remedial measures are taken by the borrower. Credit exposure becomes more likely in such credits and a serious evaluation of the secondary support to the credit is performed.

Credits rated doubtful are those in which full collection of principal appears highly questionable, and which some degree of loss is anticipated, even though the ultimate amount of loss may not yet be certain and/or other factors exist which could affect collection of debt. Based upon available information, positive action by the Company is required to avert or minimize loss. Credits rated doubtful are generally also placed on non-accrual.

At March 31, 2013 and December 31, 2012, the following summarizes the Company’s internal ratings of its loans held for investment (in thousands):

March 31, 2013	Pass		Special Mention		Substandard		Doubtful		Total
Commercial	$	501,859	$	2,083	$	9,449	$	31	$	513,422
Agricultural		51,321		337		3,582		7		55,247
Real Estate		1,222,112		15,015		38,281		156		1,275,564
Consumer		282,545		349		870		18		283,782
Total	$	2,057,837	$	17,784	$	52,182	$	212	$	2,128,015

December 31, 2012	Pass		Special Mention		Substandard		Doubtful		Total
Commercial	$	498,188	$	2,193	$	9,198	$	30	$	509,609
Agricultural		64,397		342		3,559		8		68,306
Real Estate		1,176,330		14,680		35,673		140		1,226,823
Consumer		271,114		382		911		21		272,428
Total	$	2,010,029	$	17,597	$	49,341	$	199	$	2,077,166

16

At March 31, 2013 and December 31, 2012, the Company’s past due loans are as follows (in thousands):

March 31, 2013	15-59 Days Past Due*		60-89 Days Past Due		Greater Than 90 Days		Total Past Due		Current		Total Loans		90 Days Past Due Still Accruing
Commercial	$	4,146	$	307	$	283	$	4,736	$	508,686	$	513,422	$	3
Agricultural		641		16		—		657		54,590		55,247		—
Real Estate		14,962		1,653		1,907		18,522		1,257,042		1,275,564		—
Consumer		1,629		227		144		2,000		281,782		283,782		21
Total	$	21,378	$	2,203	$	2,334	$	25,915	$	2,102,100	$	2,128,015	$	24

December 31, 2012	15-59 Days Past Due*		60-89 Days Past Due		Greater Than 90 Days		Total Past Due		Current		Total Loans		90 Days Past Due Still Accruing
Commercial	$	1,708	$	470	$	247	$	2,425	$	507,184	$	509,609	$	—
Agricultural		467		95		—		562		67,744		68,306		—
Real Estate		10,141		2,711		1,237		14,089		1,212,734		1,226,823		34
Consumer		1,660		287		163		2,110		270,318		272,428		63
Total	$	13,976	$	3,563	$	1,647	$	19,186	$	2,057,980	$	2,077,166	$	97

* The Company monitors commercial, agricultural and real estate loans after such loans are 15 days past due. Consumer loans are monitored after such loans are 30 days past due.

The allowance for loan losses as of March 31, 2013 and 2012, and December 31, 2012, is presented below. Management has evaluated the adequacy of the allowance for loan losses by estimating the probable losses in various categories of the loan portfolio, which are identified below (in thousands):

	March 31,				December 31, 2012
	2013		2012
Allowance for loan losses provided for:
Loans specifically evaluated as impaired	$	5,793	$	5,357	$	6,010
Remaining portfolio		28,879		29,172		28,829
Total allowance for loan losses	$	34,672	$	34,529	$	34,839

The following table details the allowance for loan losses at March 31, 2013 and December 31, 2012 by portfolio segment (in thousands). Allocation of a portion of the allowance to one category of loans does not preclude its availability to absorb losses in other categories.

March 31, 2013	Commercial		Agricultural		Real Estate		Consumer		Total
Loans individually evaluated for impairment	$	2,542	$	388	$	8,983	$	315	$	12,228
Loans collectively evaluated for impairment		3,962		1,078		15,878		1,526		22,444
Total	$	6,504	$	1,466	$	24,861	$	1,841	$	34,672

December 31, 2012	Commercial		Agricultural		Real Estate		Consumer		Total
Loans individually evaluated for impairment	$	3,253	$	388	$	8,380	$	308	$	12,329
Loans collectively evaluated for impairment		4,090		1,153		15,683		1,584		22,510
Total	$	7,343	$	1,541	$	24,063	$	1,892	$	34,839

17

Changes in the allowance for loan losses for the three months ended March 31, 2013 and 2012 are summarized as follows (in thousands):

Three months ended March 31, 2013	Commercial			Agricultural			Real Estate			Consumer			Total
Beginning balance	$	7,343		$	1,541		$	24,063		$	1,892		$	34,839
Provision for loan losses		(672	)		(86	)		1,120			39			401
Recoveries		121			11			28			95			255
Charge-offs		(288	)		—			(350	)		(185	)		(823	)
Ending balance	$	6,504		$	1,466		$	24,861		$	1,841		$	34,672

Three months ended March 31, 2012	Commercial			Agricultural			Real Estate			Consumer			Total
Beginning balance	$	9,664		$	1,482		$	21,533		$	1,636		$	34,315
Provision for loan losses		94			(119	)		1,161			160			1,296
Recoveries		103			12			113			95			323
Charge-offs		(249	)		(22	)		(972	)		(162	)		(1,405	)
Ending balance	$	9,612		$	1,353		$	21,835		$	1,729		$	34,529

The Company’s recorded investment in loans as of March 31, 2013 and December 31, 2012 related to the balance in the allowance for loan losses on the basis of the Company’s impairment methodology was as follows (in thousands):

March 31, 2013	Commercial		Agricultural		Real Estate		Consumer		Total
Loans individually evaluated for impairment	$	11,563	$	3,926	$	53,452	$	1,237	$	70,178
Loans collectively evaluated for impairment		501,859		51,321		1,222,112		282,545		2,057,837
Total	$	513,422	$	55,247	$	1,275,564	$	283,782	$	2,128,015

December 31, 2012	Commercial		Agricultural		Real Estate		Consumer		Total
Loans individually evaluated for impairment	$	11,421	$	3,909	$	50,493	$	1,314	$	67,137
Loans collectively evaluated for impairment		498,188		64,397		1,176,330		271,114		2,010,029
Total	$	509,609	$	68,306	$	1,226,823	$	272,428	$	2,077,166

The Company’s loans that were modified in the three months ended March 31, 2013 and 2012 and considered a troubled debt restructuring are as follows (dollars in thousands):

	Three months ended March 31, 2013						Three months ended March 31, 2012
			Pre-Modification		Post- Modification				Pre-Modification		Post- Modification
			Recorded		Recorded				Recorded		Recorded
	Number		Investment		Investment		Number		Investment		Investment
Commercial		2	$	120	$	120		4	$	127	$	127
Agricultural		1		24		24		2		108		108
Real Estate		4		796		796		13		3,803		3,803
Consumer		—		—		—		—		—		—
Total		7	$	940	$	940		19	$	4,038	$	4,038

18

The balances below provide information as to how the loans were modified as troubled debt restructured loans during the three months ended March 31, 2013 and 2012 (in thousands):

	Three months ended March 31, 2013						Three months ended March 31, 2012
	Adjusted Interest Rate		Extended Maturity		Combined Rate and Maturity		Adjusted Interest Rate		Extended Maturity		Combined Rate and Maturity
Commercial	$	—	$	120	$	—	$	17	$	62	$	48
Agricultural		—		24		—		—		13		95
Real Estate		272		350		174		—		—		3,803
Consumer		—		—		—		—		—		—
Total	$	272	$	494	$	174	$	17	$	75	$	3,946

During the three months ended March 31, 2013, 11 loans totaling $1,167,000 that had been modified as a troubled debt restructured loan within the previous 12 months defaulted on the modified loan. A default for purposes of this disclosure is a troubled debt restructured loan in which the borrower is 90 days past due or results in the foreclosure and repossession of the applicable collateral. There were no such defaults for the three months ended March 31, 2012. The loans are as follows (dollars in thousands):

	Three months ended March 31, 2013
	Number		Balance
Commercial		5	$	217
Agriculture		—		—
Real Estate		5		931
Consumer		1		19
Total		11	$	1,167

As of March 31, 2013, the Company has no commitments to lend additional funds to loan customers whose terms have been modified in troubled debt restructurings.

Our subsidiary bank has established a line of credit with the Federal Home Loan Bank of Dallas to provide liquidity and meet pledging requirements for those customers eligible to have securities pledged to secure certain uninsured deposits. At March 31, 2013, approximately $1,118,519,000 in loans held by the bank were subject to blanket liens as security for these lines of credit. At March 31, 2013, $68,600,000 in letters of credit issued by the Federal Home Loan Bank of Dallas were outstanding under these lines of credit. The letters of credit were pledged as collateral for public funds held by our bank.

Note 5 – Income Taxes

Income tax expense was $6,182,000 for the first quarter in 2013 as compared to $6,035,000 for the same period in 2012. Our effective tax rates on pretax income were 25.0% and 25.4% for the first quarter of 2013 and 2012, respectively. The effective tax rates differ from the statutory federal tax rate of 35% largely due to tax exempt interest income earned on certain investment securities and loans, the deductibility of dividends paid to our employee stock ownership plan and Texas state taxes.

Note 6 – Stock Based Compensation

The Company grants incentive stock options for a fixed number of shares with an exercise price equal to the fair value of the shares at the date of grant to employees. No options have been granted in 2013 or 2012. The Company recorded stock option expense totaling approximately $88,000 thousand and $88,000, respectively, for the three-month periods ended March 31, 2013 and 2012. The additional disclosure requirements under authoritative accounting guidance have been omitted due to immateriality.

19

Note 7 – Pension Plan

The Company’s defined benefit pension plan was frozen effective January 1, 2004, whereby no additional years of service will accrue to participants, unless the pension plan is reinstated at a future date. The pension plan covered substantially all of the Company’s employees at the time. The benefits for each employee were based on years of service and a percentage of the employee’s qualifying compensation during the final years of employment. The Company’s funding policy was and is to contribute annually the amount necessary to satisfy the Internal Revenue Service’s funding standards. Contributions to the pension plan, prior to freezing the plan, were intended to provide not only for benefits attributed to service to date but also for those expected to be earned in the future. As a result of the Pension Protection Act of 2006 (the “Protection Act”), the Company will be required to contribute amounts in future years to fund any shortfalls. The Company has evaluated the provisions of the Protection Act as well as the Internal Revenue Service’s funding standards to develop a plan for funding in future years. The Company made a contribution totaling $2,000,000 in 2012 and has to date made no contributions in 2013.

Net periodic benefit costs totaling $208,000 and $185,000 were recorded, respectively, for the three months ended March 31, 2013 and 2012.

Note 8 – Recently Issued Authoritative Accounting Guidance

In 2011 and 2013, the Financial Accounting Standards Board (the “FASB”) amended its authoritative guidance related to offsetting assets and liabilities to require an entity to disclose both gross and net information about financial instruments, such as sales and repurchase agreements and reverse sales and repurchase agreements and securities borrowing/lending arrangements, and derivative instruments that are eligible for offset in the statement of financial position and/or subject to a master netting arrangement or similar agreement. The new guidance was effective for annual and interim periods beginning on January 1, 2013, and did not have a significant impact on the Company’s financial statements.

In 2013, the FASB amended its authoritative guidance related to reporting of reclassifications out of other comprehensive earnings. The new guidance sets requirements for presentation for significant items reclassified to net earnings during the period presented. The new guidance was effective for annual and interim periods beginning on January 1, 2013 and have been included in these financial statements.

Note 9 – Fair Value Disclosures

The authoritative accounting guidance for fair value measurements 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. A fair value measurement assumes that the transaction to sell the asset or transfer the liability occurs in the principal market for the asset or liability or, in the absence of a principal market, the most advantageous market for the asset or liability. The price in the principal (or most advantageous) market used to measure the fair value of the asset or liability shall not be adjusted for transaction costs. An orderly transaction is a transaction that assumes exposure to the market for a period prior to the measurement date to allow for marketing activities that are usual and customary for transactions involving such assets and liabilities; it is not a forced transaction. Market participants are buyers and sellers in the principal market that are (i) independent, (ii) knowledgeable, (iii) able to transact, and (iv) willing to transact.

The authoritative accounting guidance requires the use of valuation techniques that are consistent with the market approach, the income approach and/or the cost approach. The market approach uses prices and other relevant information generated by market transactions involving identical or comparable assets and liabilities. The income approach uses valuation techniques to convert future amounts, such as cash flows or earnings, to a single present amount on a discounted basis. The cost approach is based on the amount that currently would be required to replace the service capacity of an asset (replacement costs). Valuation techniques should be consistently applied. Inputs to valuation techniques refer to the assumptions that market participants would use in pricing the asset or liability. Inputs may be observable, meaning those

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that reflect the assumptions market participants would use in pricing the asset or liability developed based on market data obtained from independent sources, or unobservable, meaning those that reflect the reporting entity’s own assumptions about the assumptions market participants would use in pricing the asset or liability developed based on the best information available in the circumstances. In that regard, the authoritative guidance establishes a fair value hierarchy for valuation inputs that gives the highest priority to quoted prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs. The fair value hierarchy is as follows:

• Level 1 Inputs – Unadjusted quoted prices in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date.

• Level 2 Inputs – Inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. These include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (for example, interest rates, volatilities, prepayment speeds, loss severities, credit risks and default rates) or inputs that are derived principally from or corroborated by observable market data by correlation or other means.

• Level 3 Inputs – Significant unobservable inputs that reflect an entity’s own assumptions that market participants would use in pricing the assets or liabilities.

A description of the valuation methodologies used for assets and liabilities measured at fair value, as well as the general classification of such instruments pursuant to the valuation hierarchy, is set forth below.

In general, fair value is based upon quoted market prices, where available. If such quoted market prices are not available, fair value is based upon internally developed models that primarily use, as inputs, observable market-based parameters. Valuation adjustments may be made to ensure that financial instruments are recorded at fair value. While management believes the Company’s valuation methodologies are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different estimate of fair value at the reporting date.

Securities classified as available-for-sale and trading are reported at fair value utilizing Level 1 and Level 2 inputs. For these securities, the Company obtains fair value measurements from an independent pricing service. The fair value measurements consider observable data that may include market spreads, cash flows, the United States Treasury yield curve, live trading levels, trade execution data, dealer quotes, market consensus prepayments speeds, credit information and the security’s terms and conditions, among other items. Securities are considered to be measured with Level 1 inputs at the time of purchase and for 30 days following. After 30 days, the majority of securities are transferred to Level 2 as they are considered to be measured with Level 2 inputs, with the exception of U. S. Treasury securities and any other security for which there remain Level 1 inputs. Transfers are recognized on the actual date of transfer.

There were no transfers between Level 2 and Level 3 during the three months ended March 31, 2013 or 2012.

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The following table summarizes financial assets and financial liabilities measured at fair value on a recurring basis as of March 31, 2013, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value (dollars in thousands):

	Level 1 Inputs		Level 2 Inputs		Level 3 Inputs		Total Fair Value
Available-for-sale investment securities:
U. S. Treasury securities	$	6,039	$	—	$	—	$	6,039
Obligations of U. S. government sponsored-enterprises and agencies		16,844		176,520		—		193,364
Obligations of states and political subdivisions		86,393		831,522		—		917,915
Corporate bonds		—		113,067		—		113,067
Residential mortgage-backed securities		37,972		578,594		—		616,566
Commercial mortgage-backed securities		10,556		96,489		—		107,045
Other securities		4,155		—		—		4,155
Total	$	161,959	$	1,796,192	$	—	$	1,958,151

Certain financial assets and financial liabilities are measured at fair value on a nonrecurring basis, that is, 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). Financial assets and financial liabilities measured at fair value on a non-recurring basis include the following at March 31, 2013:

Impaired Loans – Impaired loans are reported at the fair value of the underlying collateral if repayment is expected solely from the collateral. Collateral values are estimated using Level 2 inputs based on observable market data, or Level 3 input based on the discounting of the collateral. At March 31, 2013, impaired loans with a carrying value of $22,509,000 were reduced by specific valuation reserves totaling $5,793,000 resulting in a net fair value of $16,716,000.

Loans Held for Sale – Loans held for sale are reported at the lower of cost or fair value. In determining whether the fair value of loans held for sale is less than cost when quoted market prices are not available, the Company considers investor commitments/contracts. These loans are considered Level 2 of the fair value hierarchy. At March 31, 2013, the Company’s mortgage loans held for sale were recorded at cost as fair value exceeded cost.

Certain non-financial assets and non-financial liabilities measured at fair value on a non-recurring basis include other real estate owned, goodwill and other intangible assets and other non-financial long-lived assets. Non-financial assets measured at fair value on a non-recurring basis during the three months ended March 31, 2013 and 2012 include other real estate owned which, subsequent to their initial transfer to other real estate owned from loans, were re-measured at fair value through a write-down included in gain (loss) on sale of foreclosed assets. During the reported periods, all fair value measurements for foreclosed assets utilized Level 2 inputs based on observable market data, generally third-party appraisals, or Level 3 inputs based on customized discounting criteria. These appraisals are evaluated individually and discounted are as necessary due to the age of the appraisal, lack of comparable sales, expected holding periods of property or special use type of the property. Such discounts vary by appraisal based on

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the above factors but generally range from 5% to 25% of the appraised value. Reevaluation of other real estate owned is performed at least annually as required by regulatory guidelines or more often if particular circumstances arise. The following table presents other real estate owned that were re-measured subsequent to their initial transfer to other real estate owned (dollars in thousands):

	Three months ended March 31,
	2013			2012
Carrying value of other real estate owned prior to re-measurement	$	1,827		$	417
Write-downs included in gain (loss) on sale of other real estate owned		(304	)		(101	)
Fair value	$	1,523		$	316

At March 31, 2013 and 2012, and December 31, 2012, other real estate owned totaled $3,052,000, $7,815,000 and $3,505,000, respectively.

The Company is required under current authoritative accounting guidance to disclose the estimated fair value of their financial instrument assets and liabilities including those subject to the requirements discussed above. For the Company, as for most financial institutions, substantially all of its assets and liabilities are considered financial instruments, as defined. Many of the Company’s financial instruments, however, lack an available trading market as characterized by a willing buyer and willing seller engaging in an exchange transaction.

The estimated fair value amounts of financial instruments have been determined by the Company using available market information and appropriate valuation methodologies. However, considerable judgment is required to interpret data to develop the estimates of fair value. Accordingly, the estimates presented herein are not necessarily indicative of the amounts the Company could realize in a current market exchange. The use of different market assumptions and/or estimation methodologies may have a material effect on the estimated fair value amounts.

In addition, reasonable comparability between financial institutions may not be likely due to the wide range of permitted valuation techniques and numerous estimates that must be made given the absence of active secondary markets for many of the financial instruments. This lack of uniform valuation methodologies also introduces a greater degree of subjectivity to these estimated fair values.

Cash and due from banks, federal funds sold, interest-bearing deposits and time deposits in banks and accrued interest receivable and payable are liquid in nature and considered Level 1 or 2 of the fair value hierarchy.

Financial instruments with stated maturities have been valued using a present value discounted cash flow with a discount rate approximating current market for similar assets and liabilities and are considered Levels 2 and 3 of the fair value hierarchy. Financial instrument liabilities with no stated maturities have an estimated fair value equal to both the amount payable on demand and the carrying value and are considered Level 1 of the fair value hierarchy.

The carrying value and the estimated fair value of the Company’s contractual off-balance-sheet unfunded lines of credit, loan commitments and letters of credit, which are generally priced at market at the time of funding, are not material.

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The estimated fair values and carrying values of all financial instruments under current authoritative guidance at March 31, 2013 and December 31, 2012, were as follows (in thousands):

	March 31,				December 31,
	2013				2012
	Carrying		Estimated		Carrying		Estimated		Fair Value
	Value		Fair Value		Value		Fair Value		Hierarchy
Cash and due from banks	$	113,958	$	113,958	$	207,018	$	207,018	Level 1
Federal funds sold		3,175		3,175		14,045		14,045	Level 1
Interest-bearing deposits in banks		20,065		20,065		139,676		139,676	Level 1
Interest-bearing time deposits in banks		45,172		45,415		49,005		49,288	Level 2
Available-for-sale securities		1,958,151		1,958,151		1,819,035		1,819,035	Levels 1 and 2
Held-to-maturity securities		903		920		1,061		1,080	Level 2
Loans		2,103,465		2,120,669		2,053,784		2,081,091	Level 3
Accrued interest receivable		20,904		20,904		23,122		23,122	Level 2
Deposits with stated maturities		620,848		621,946		637,040		638,227	Level 2
Deposits with no stated maturities		2,929,278		2,929,278		2,995,544		2,995,544	Level 1
Short term borrowings		263,345		263,345		259,697		259,697	Level 2
Accrued interest payable		239		239		287		287	Level 2

Note 10 – Acquisition Definitive Agreement Signed

On February 20, 2013, the Company announced that it has entered into a definitive agreement to acquire Orange Savings Bank, SSB in Orange, Texas for an expected combination of cash and stock purchase price of approximately $56.0 million. Pending regulatory and shareholder approval, the acquisition is expected to be finalized in the second quarter of 2013.

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

Forward-Looking Statements

This Form 10-Q contains certain forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. When used in this Form 10-Q, words such as “anticipate,” “believe,” “estimate,” “expect,” “intend,” “predict,” “project,” and similar expressions, as they relate to us or management, identify forward-looking statements. These forward-looking statements are based on information currently available to our management. Actual results could differ materially from those contemplated by the forward-looking statements as a result of certain factors, including, but not limited to, those listed in “Item 1A- Risk Factors” in our Annual Report on Form 10-K and the following:

• general economic conditions, including our local, state and national real estate markets and employment trends;

• volatility and disruption in national and international financial markets;

• government intervention in the U.S. financial system including the effects of recent legislative, tax, accounting and regulatory actions and reforms, including the Dodd-Frank Wall Street Reform and Consumer Protection Act (the “Dodd-Frank Act”), the Jumpstart Our Business Startups Act, the Consumer Financial Protection Bureau and the ratios of proposed rule making per Basel III;

• political instability;

• the ability of the Federal government to deal with the slowdown of the national economy and the fiscal cliff;

• competition from other financial institutions and financial holding companies;

• the effects of and changes in trade, monetary and fiscal policies and laws, including interest rate policies of the Board of Governors of the Federal Reserve System;

• changes in the demand for loans;

• fluctuations in the value of collateral securing our loan portfolio and in the level of the allowance for loan losses;

• the accuracy of our estimates of future loan losses;

• the accuracy of our estimates and assumptions regarding the performance of our securities portfolio;

• soundness of other financial institutions with which we have transactions;

• inflation, interest rate, market and monetary fluctuations;

• changes in consumer spending, borrowing and savings habits;

• our ability to attract deposits;

• changes in our liquidity position;

• changes in the reliability of our vendors, internal control system or information systems;

• our ability to attract and retain qualified employees;

• acquisitions and integration of acquired businesses;

• the possible impairment of goodwill associated with our acquisitions;

• consequences of continued bank mergers and acquisitions in our market area, resulting in fewer but much larger and stronger competitors;

• expansion of operations, including branch openings, new product offerings and expansion into new markets;

• changes in compensation and benefit plans; and

• acts of God or of war or terrorism.

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Such statements reflect the current views of our management with respect to future events and are subject to these and other risks, uncertainties and assumptions relating to our operations, results of operations, growth strategy and liquidity. All subsequent written and oral forward-looking statements attributable to us or persons acting on our behalf are expressly qualified in their entirety by this paragraph. We undertake no obligation to publicly update or otherwise revise any forward-looking statements, whether as a result of new information, future events or otherwise.

Introduction

As a financial holding company, we generate most of our revenue from interest on loans and investments, trust fees, and service charges. Our primary source of funding for our loans and investments are deposits held by our subsidiary bank. Our largest expenses are interest on these deposits and salaries and related employee benefits. We usually measure our performance by calculating our return on average assets, return on average equity, our regulatory leverage and risk based capital ratios, and our efficiency ratio, which is calculated by dividing noninterest expense by the sum of net interest income on a tax equivalent basis and noninterest income.

The following discussion of operations and financial condition should be read in conjunction with the financial statements and accompanying footnotes included in Item 1 of this Form 10-Q as well as those included in the Company’s 2012 Annual Report on Form 10-K.

Critical Accounting Policies

We prepare consolidated financial statements based on generally accepted accounting principles and customary practices in the banking industry. These policies, in certain areas, require us to make significant estimates and assumptions.

We deem a policy critical if (1) the accounting estimate required us to make assumptions about matters that are highly uncertain at the time we make the accounting estimate; and (2) different estimates that reasonably could have been used in the current period, or changes in the accounting estimate that are reasonably likely to occur from period to period, would have a material impact on the financial statements.

We deem our most critical accounting policies to be (1) our allowance for loan losses and our provision for loan losses and (2) our valuation of securities. We have other significant accounting policies and continue to evaluate the materiality of their impact on our consolidated financial statements, but we believe these other policies either do not generally require us to make estimates and judgments that are difficult or subjective, or it is less likely they would have a material impact on our reported results for a given period. A discussion of (1) our allowance for loan losses and our provision for loan losses and (2) our valuation of securities is included in note 4 and note 3, respectively, to our notes to consolidated financial statements (unaudited) which begins on page 7.

Consolidation of Bank Charters

Effective December 30, 2012, the Company consolidated its eleven bank charters into one charter. The Company cited regulatory, compliance and technology complexities and the opportunity for cost savings as its reason for making this change. The Company noted it expects to operate its subsidiary bank as it previously did with eleven charters with local management and board decisions to benefit the customers and communities it serves.

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Results of Operations

Performance Summary. Net earnings for the first quarter of 2013 were $18.58 million compared to $17.76 million for the same period in 2012, or a 4.62% increase over the same period in 2012.

Basic earnings per share for the first quarter of 2013 were $0.59 compared to $0.56 for the same quarter last year. The return on average assets was 1.71% for the first quarter of 2013, as compared to 1.73% for the same quarter of 2012. The return on average equity was 13.41% for the first quarter of 2013 as compared to 13.79% for the same quarter of 2012.

Net Interest Income. Net interest income is the difference between interest income on earning assets and interest expense on liabilities incurred to fund those assets. Our earning assets consist primarily of loans and investment securities. Our liabilities to fund those assets consist primarily of noninterest-bearing and interest-bearing deposits.

Tax-equivalent net interest income was $42.47 million for the first quarter of 2013, as compared to $41.75 million for the same period last year. The increase in 2013 compared to 2012 was largely attributable to the decrease in rate of interest bearing liabilities. Average earning assets increased $283.68 million for the first quarter of 2013 over the same period in 2012. Average tax exempt securities and average loans increased $133.87 million and $326.95 million, respectively, for the first quarter of 2013 over the first quarter of 2012. Average interest bearing liabilities increased $97.27 million for the first quarter of 2013, as compared to the same period in 2012. The yield on earning assets decreased 27 basis points during the first quarter of 2013, whereas the rate paid on interest-bearing liabilities decreased 11 basis points in the first quarter of 2013 primarily due to the effects of lower interest rates.

Table 1 allocates the change in tax-equivalent net interest income between the amount of change attributable to volume and to rate.

Table 1 — Changes in Interest Income and Interest Expense (in thousands):

	Three Months Ended March 31, 2013 Compared to Three Months Ended March 31, 2012
	Change Attributable to						Total Change
	Volume			Rate
Short-term investments	$	(8	)	$	(28	)	$	(36	)
Taxable investment securities		(1,288	)		(1,141	)		(2,429	)
Tax-exempt investment securities (1)		1,816			(1,118	)		698
Loans (1) (2)		4,319			(2,474	)		1,845
Interest income		4,839			(4,761	)		78
Interest-bearing deposits		32			(647	)		(615	)
Short-term borrowings		6			(27	)		(21	)
Interest expense		38			(674	)		(636	)
Net interest income	$	4,801		$	(4,087	)	$	714

(1) Computed on a tax-equivalent basis assuming a marginal tax rate of 35%.

(2) Non-accrual loans are included in loans.

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The net interest margin for the first quarter of 2013 was 4.19%, a decrease of 20 basis points from the same period in 2012. The target Federal funds rate was reduced to a range of zero to 25 basis points in December 2008. The low level of interest rates has reduced the yields on our short-term investments and investment securities as the proceeds from maturing investment securities have been invested at much lower rates. We have been able to partially mitigate the impact of low short-term interest rates by establishing minimum interest rates on certain of our loans, improving the pricing for loan risk, and reducing rates paid on interest bearing liabilities. We expect interest rates to remain at the current low levels until 2015 as announced by the Federal Reserve, which will continue to place pressure on our interest margin.

The net interest margin, which measures tax-equivalent net interest income as a percentage of average earning assets, is illustrated in Table 2.

Table 2 — Average Balances and Average Yields and Rates (in thousands, except percentages):

	Three months ended March 31,
	2013								2012
	Average Balance			Income/ Expense		Yield/ Rate			Average Balance			Income/ Expense		Yield/ Rate
Assets
Short-term investments (1)	$	137,595		$	176		0.56	%	$	136,657		$	211		0.63	%
Taxable investment securities (2)		1,038,706			6,375		2.45			1,216,783			8,804		2.89
Tax-exempt investment securities (2)(3)		824,947			10,073		4.88			691,076			9,375		5.43
Loans (3)(4)		2,111,138			26,747		5.14			1,784,192			24,901		5.61
Total earning assets		4,112,386			43,371		4.28			3,828,708			43,291		4.55
Cash and due from banks		129,945								125,443
Bank premises and equipment, net		85,476								77,535
Other assets		46,417								50,754
Goodwill and other intangible assets, net		71,968								72,099
Allowance for loan losses		(34,900	)							(34,462	)
Total assets	$	4,411,292							$	4,120,077
Liabilities and Shareholders’ Equity
Interest-bearing deposits	$	2,320,932		$	868		0.15	%	$	2,252,481		$	1,482		0.26	%
Short-term borrowings		270,561			37		0.06			241,745			58		0.10
Total interest-bearing liabilities		2,591,493			905		0.14			2,494,226			1,540		0.25
Noninterest-bearing deposits		1,205,522								1,055,654
Other liabilities		52,630								52,514
Total liabilities		3,849,645								3,602,394
Shareholders’ equity		561,647								517,683
Total liabilities and shareholders’ equity	$	4,411,292							$	4,120,077
Net interest income				$	42,466							$	41,751
Rate Analysis:
Interest income/earning assets							4.28	%							4.55	%
Interest expense/earning assets							0.11								0.16
Net yield on earning assets							4.19	%							4.39	%

(1) Short-term investments are comprised of Fed Funds sold, interest-bearing deposits in banks and interest-bearing time deposits in banks.

(2) Average balances include unrealized gains and losses on available-for-sale securities.

(3) Computed on a tax-equivalent basis assuming a marginal tax rate of 35%.

(4) Non-accrual loans are included in loans.

Noninterest Income. Noninterest income for the first quarter of 2013 was $13.96 million, an increase of $662 thousand over the same period in 2012. Trust fees increased $339 thousand and real estate mortgage operations increased $334 thousand. The increase in trust fees reflects an increase in estate fees, fees from mineral management and an increase in assets under management over the prior year from both improved market conditions and growth in assets managed. The fair value of our trust assets managed,

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which are not reflected in our consolidated balance sheet, totaled $3.02 billion at March 31, 2013 as compared to $2.63 billion for the same date in 2012. Real estate mortgage income increased primarily due to a stronger housing market and increased market share.

Offsetting these increases was a decrease in our net gain on sale of available for sale securities of $124 thousand and a loss on sale of foreclosed assets of $322 thousand.

Table 3 — Noninterest Income (in thousands):

	Three Months Ended March 31,
	2013			Increase (Decrease)			2012
Trust fees	$	3,793		$	339		$	3,454
Service charges on deposit accounts		3,895			13			3,882
ATM, interchange and credit card fees		3,729			53			3,676
Real estate mortgage operations		1,384			334			1,050
Net gain on sale of available-for-sale securities		222			(124	)		346
Net gain (loss) on sale of foreclosed assets		(316	)		(322	)		6
Other:
Check printing fees		50			9			41
Safe deposit rental fees		165			(1	)		166
Credit life and debt protection fees		40			4			36
Brokerage commissions		109			68			41
Interest on loan recoveries		238			125			113
Gain (loss) on sale of assets, net		168			46			122
Miscellaneous income		483			118			365
Total other		1,253			369			884
Total Noninterest Income	$	13,960		$	662		$	13,298

Noninterest Expense. Total noninterest expense for the first quarter of 2013 was $27.47 million, an increase of $1.00 million, or 3.79%, as compared to the same period in 2012. An important measure in determining whether a banking company effectively manages noninterest expenses is the efficiency ratio, which is calculated by dividing noninterest expense by the sum of net interest income on a tax-equivalent basis and noninterest income. Lower ratios indicate better efficiency since more income is generated with a lower noninterest expense total. Our efficiency ratio for the first quarter of 2013 was 48.68%, compared to 48.08% from the same period in 2012.

Salaries and employee benefits for the first quarter of 2013 totaled $15.18 million, an increase of $951 thousand compared to 2012. The increase was largely the result of additional employees to staff new branches and annual pay increases.

All other categories of noninterest expense for the first quarter of 2013 totaled $12.29 million, an increase of $52 thousand, or 0.42%, as compared to the same period in 2012. Categories of noninterest expense with increases included ATM, interchange and credit card expense, equipment expense and professional and service fees. Offsetting these increases were decreases in operation and other losses, legal fees and regulatory exam fees. Included in noninterest expense for the first quarter of 2013 are costs, primarily legal and travel, totaling $143 thousand related to the Company’s recently announced acquisition of Orange Savings Bank, SSB, which is expected to close in the second quarter of 2013.

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Table 4 — Noninterest Expense (in thousands):

	Three Months Ended March 31,
	2013		Increase (Decrease)			2012
Salaries	$	11,381	$	611		$	10,770
Medical		1,017		214			803
Profit sharing		1,079		36			1,043
Pension		208		23			185
401(k) match expense		381		25			356
Payroll taxes		1,026		42			984
Stock option expense		88		—			88
Total salaries and employee benefits		15,180		951			14,229
Net occupancy expense		1,766		29			1,737
Equipment expense		2,281		173			2,108
FDIC assessment fees		572		45			527
ATM, interchange and credit card expense		1,340		91			1,249
Professional and service fees		803		66			737
Printing, stationery and supplies		472		(33	)		505
Amortization of intangible assets		10		(34	)		44
Other:
Data processing fees		59		(4	)		63
Postage		378		46			332
Advertising		552		32			520
Correspondent bank service charges		202		2			200
Telephone		402		1			401
Public relations and business development		442		20			422
Directors’ fees		231		29			202
Audit and accounting fees		381		39			342
Legal fees		143		(106	)		249
Regulatory exam fees		197		(62	)		259
Travel		171		6			165
Courier expense		188		(4	)		192
Operational and other losses		192		(195	)		387
Other real estate		117		(6	)		123
Other miscellaneous expense		1,392		(83	)		1,475
Total other		5,047		(285	)		5,332
Total Noninterest Expense	$	27,471	$	1,003		$	26,468

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Balance Sheet Review

Loans. Our portfolio is comprised of loans made to businesses, professionals, individuals, and farm and ranch operations located in the primary trade areas served by our subsidiary bank. Real estate loans represent loans primarily for 1-4 family residences and owner-occupied commercial real estate. The structure of loans in the real estate mortgage area generally provides re-pricing intervals to minimize the interest rate risk inherent in long-term fixed rate loans. As of March 31, 2013, total loans held for investment were $2.13 billion, an increase of $50.85 million, as compared to December 31, 2012. As compared to December 31, 2012, commercial loans increased $3.8 million, agricultural loans decreased $13.1 million, real estate loans increased $48.7 million, and consumer loans increased $11.4 million. Loans averaged $2.11 billion during the first quarter of 2013, an increase of $326.9 million from the prior year first quarter average balances.

Table 5 — Composition of Loans (in thousands):

	March 31,				December  31, 2012
	2013		2012
Commercial	$	513,422	$	433,351	$	509,609
Agricultural		55,247		57,977		68,306
Real estate		1,275,564		1,083,244		1,226,823
Consumer		283,782		218,600		272,428
Total loans held for investment	$	2,128,015	$	1,793,172	$	2,077,166

At March 31, 2013, our real estate loans represent approximately 60.2% of our loan portfolio and are comprised of (i) 1-4 family residence loans of 43.6%, (ii) commercial real estate loans of 28.2%, generally owner occupied, (iii) other loans, which includes ranches, hospitals and universities, of 18.6%, (iv) residential development and construction loans of 5.7%, which includes our custom and speculation home construction loans and (v) commercial development and construction loans of 3.9%.

Loans held for sale, consisting of mortgage loans, totaled $10.1 million, $5.7 million and $11.5 million at March 31, 2013 and 2012, and December 31, 2012, respectively, in which the carrying amounts approximate market.

Asset Quality. Our loan portfolios are subject to periodic reviews by our centralized independent loan review group as well as periodic examinations by state and federal bank regulatory agencies. Loans are placed on nonaccrual status when, in the judgment of management, the collectability of principal or interest under the original terms becomes doubtful. Nonaccrual, past due 90 days still accruing and restructured loans plus foreclosed assets, were $25.7 million at March 31, 2013, as compared to $28.9 million at March 31, 2012 and $25.5 million at December 31, 2012. As a percent of loans and foreclosed assets, these assets were 1.20% at March 31, 2013, as compared to 1.60% at March 31, 2012 and 1.22% at December 31, 2012. As a percent of total assets, these assets were 0.58% at March 31, 2013 as compared to 0.68% at March 31, 2012 and 0.57% at December 31, 2012. The continued higher levels of these nonperforming assets are the result of ongoing weakness in real estate markets and the national economy. We believe the level of these assets to be manageable at March 31, 2013.

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Table 6 — Non-accrual Loans, Loans Still Accruing and Past Due 90 Days or More, Restructured Loans and Foreclosed Assets (in thousands, except percentages):

	March 31,						December  31, 2012
	2013			2012
Non-accrual loans	$	22,509		$	20,963		$	21,800
Loans still accruing and past due 90 days or more		24			53			97
Restructured loans		—			—			—
Foreclosed assets		3,185			7,852			3,565
Total	$	25,718		$	28,868		$	25,462
As a % of loans and foreclosed assets		1.20	%		1.60	%		1.22	%
As a % of total assets		0.58	%		0.68	%		0.57	%

We record interest payments received on non-accrual loans as reductions of principal. Prior to the loans being placed on non-accrual, we recognized interest income on impaired loans as of December 31, 2012 described above of approximately $287 thousand during the year ended December 31, 2012. If interest on these impaired loans had been recognized on a full accrual basis during the year ended December 31, 2012, such income would have approximated $1.67 million. Such amounts for the 2013 and 2012 interim periods were insignificant.

Provision and Allowance for Loan Losses. The allowance for loan losses is the amount we determine as of a specific date to be appropriate to absorb probable losses on existing loans in which full collectability is unlikely based on our review and evaluation of the loan portfolio. For a discussion of our methodology, see note 4 to our notes to consolidated financial statements (unaudited). The provision for loan losses was $401 thousand for the first quarter of 2013, as compared to $1.3 million for the first quarter of 2012. The continued provision for loan losses in 2013 and 2012 reflects the growth in loans and continuing higher levels of nonperforming assets. However, the general stability of our balances in non-accrual loans and reductions in net charge-offs enabled the Company to reduce its provisions in the first quarter of 2013 compared to the prior year. As a percent of average loans, net loan charge-offs were 0.11% for the first quarter of 2013 compared to 0.24% during the first quarter of 2012. The allowance for loan losses as a percent of loans was 1.62% as of March 31, 2013, as compared to 1.67% as of December 31, 2012 and 1.92% as of March 31, 2012. Included in Table 7 is further analysis of our allowance for loan losses compared to charge-offs.

Table 7 — Loan Loss Experience and Allowance for Loan Losses (in thousands, except percentages):

	Three Months Ended March 31,
	2013			2012
Allowance for loan losses at period end	$	34,672		$	34,529
Loans held for investment at period end		2,128,015			1,793,172
Average loans for period		2,111,138			1,784,192
Net charge-offs/average loans (annualized)		0.11	%		0.24	%
Allowance for loan losses/period-end loans		1.62	%		1.92	%
Allowance for loan losses/nonaccrual loans, past due 90 days still accruing and restructured loans		153.9	%		164.3	%

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The ratio of our allowance to non-accrual, past due 90 days still accruing and restructured loans has generally trended downward since 2007, as the economic conditions worsened. Although the ratio has declined from prior years when net charge-offs and non-performing asset levels were historically low, management believes the allowance for loan losses is appropriate at March 31, 2013 in spite of these trends.

Interest-Bearing Deposits and Time Deposits in Banks. As of March 31, 2013, our interest-bearing deposits and time deposits were $65.2 million compared with $146.2 million and $188.7 million as of March 31, 2012 and December 31, 2012, respectively. At March 31, 2013, interest-bearing deposits and time deposits in banks included $45.2 million invested in FDIC-insured certificates of deposit, and $19.3 million maintained at the Federal Reserve Bank of Dallas. Interest-bearing deposits in banks results from several factors including cash flows from maturing investment securities, growth in deposits and fluctuating deposits from larger depository customers.

Available-for-Sale and Held-to-Maturity Securities. At March 31, 2013, securities with an amortized cost of $903 thousand were classified as securities held-to-maturity and securities with a fair value of $1.96 billion were classified as securities available-for-sale. As compared to December 31, 2012, the available for sale portfolio, carried at fair value, at March 31, 2013, reflected (i) a decrease of $30.2 million in U.S. Treasury securities and obligations of U.S. government sponsored-enterprises and agencies, (ii) an increase of $74.2 million in obligations of states and political subdivisions, (iii) a decrease of $6.0 million in corporate and other bonds, and (iv) an increase of $101.0 million in mortgage-backed securities. Our mortgage related securities are backed by GNMA, FNMA or FHLMC or are collateralized by securities guaranteed by these agencies.

See note 3 to consolidated financial statements (unaudited) for additional disclosures related to the maturities and fair values of the investment portfolio at March 31, 2013 and December 31, 2012.

Table 8 — Maturities and Yields of Available-for-Sale and Held-to-Maturity Securities Held at March 31, 2013 (in thousands, except percentages):

	Maturing
	One Year or Less					After One Year Through Five Years					After Five Years Through Ten Years					After Ten Years					Total
Available-for-Sale:	Amount		Yield			Amount		Yield			Amount		Yield			Amount		Yield			Amount		Yield
U.S. Treasury securities	$	6,040		1.78	%	$	—		—	%	$	—		—	%	$	—		—	%	$	6,040		1.78	%
Obligations of U.S. government sponsored-enterprises and agencies		56,061		2.73			137,303		1.37			—		—			—		—			193,364		1.77
Obligations of states and political subdivisions		65,189		5.26			305,109		4.58			519,967		5.40			27,650		5.87			917,915		5.13
Corporate bonds and other securities		17,076		4.64			90,049		2.76			10,097		4.36			—		—			117,222		2.79
Mortgage-backed securities		20,818		4.47			428,493		2.97			219,778		2.19			54,521		2.73			723,610		2.76
Total	$	165,184		4.11	%	$	960,954		3.19	%	$	749,842		4.45	%	$	82,171		3.78	%	$	1,958,151		3.77	%

	Maturing
	One Year or Less					After One Year Through Five Years					After Five Years Through Ten Years					After Ten Years					Total
Held-to-Maturity:	Amount		Yield			Amount		Yield			Amount		Yield			Amount		Yield			Amount		Yield
Obligations of states and political subdivisions	$	595		8.03	%	$	—		—	%	$	—		—	%	$	—		—	%	$	595		8.03	%
Mortgage-backed securities		18		6.62			198		2.82			92		1.78			—		—			308		2.73
Total	$	613		7.99	%	$	198		2.82	%	$	92		1.78	%	$	—		—	%	$	903		6.22	%

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All yields are computed on a tax-equivalent basis assuming a marginal tax rate of 35%. Yields on securities are based on amortized cost. Maturities of mortgage-backed securities are based on contractual maturities and could differ due to prepayments of underlying mortgages. Maturities of other securities are reported at the sooner of maturity date or call date.

As of March 31, 2013, the investment portfolio had an overall tax equivalent yield of 3.73%, a weighted average life of 4.61 years and modified duration of 4.07 years.

Deposits. Deposits held by subsidiary banks represent our primary source of funding. Total deposits were $3.55 billion as of March 31, 2013, as compared to $3.40 billion as of March 31, 2012. Table 9 provides a breakdown of average deposits and rates paid for the three month period ended March 31, 2013 and 2012.

Table 9 — Composition of Average Deposits (in thousands, except percentages):

	Three Months Ended March 31,
	2013					2012
	Average Balance		Average Rate			Average Balance		Average Rate
Noninterest-bearing deposits	$	1,205,522		—	%	$	1,055,654		—	%
Interest-bearing deposits
Interest-bearing checking		1,005,770		0.11			879,458		0.12
Savings and money market accounts		687,143		0.07			628,056		0.14
Time deposits under $100,000		277,206		0.28			313,662		0.78
Time deposits of $100,000 or more		350,813		0.35			431,305		0.38
Total interest-bearing deposits		2,320,932		0.15	%		2,252,481		0.26	%
Total average deposits	$	3,526,454				$	3,308,135

Short-Term Borrowings. Included in short-term borrowings were federal funds purchased and securities sold under repurchase agreements of $263.3 million and $237.6 million at March 31, 2013 and 2012, respectively. Securities sold under repurchase agreements are generally with significant customers that require short-term liquidity for their funds which we pledge our securities that have a fair value equal to at least the amount of the short-term borrowing. The average balance of federal funds purchased and securities sold under repurchase agreements was $269.6 million and $241.7 million in the first quarters of 2013 and 2012, respectively. The average rates paid on federal funds purchased and securities sold under repurchase agreements was 0.06% and 0.10% for the first quarters of 2013 and 2012, respectively.

Capital Resources

We evaluate capital resources by our ability to maintain adequate regulatory capital ratios to do business in the banking industry. Issues related to capital resources arise primarily when we are growing at an accelerated rate but not retaining a significant amount of our profits or when we experience significant asset quality deterioration.

Total shareholders’ equity was $564.3 million, or 12.66% of total assets, at March 31, 2013, as compared to $517.0 million, or 12.23% of total assets, at March 31, 2012. Included in shareholders’ equity at March 31, 2013 and March 31, 2012, were $55.5 million and $52.3 million, respectively, in unrealized gains on investment securities available-for-sale, net of related income taxes. For the first quarter of 2013, total shareholders’ equity averaged $561.6 million, or 12.73% of average assets, as compared to $517.7 million, or 12.56% of average assets, during the same period in 2012.

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Banking regulators measure capital adequacy by means of the risk-based capital ratio and leverage ratio. The risk-based capital rules provide for the weighting of assets and off-balance-sheet commitments and contingencies according to prescribed risk categories ranging from 0% to 100%. Regulatory capital is then divided by risk-weighted assets to determine the risk-adjusted capital ratios. The leverage ratio is computed by dividing shareholders’ equity less intangible assets by quarter-to-date average assets less intangible assets. Regulatory minimums to be designated “well capitalized” for total risk-based, Tier 1 risk based and leverage ratios are 10.00%, 6.00% and 5.00%, respectively. As of March 31, 2013, our total risk-based, Tier 1 risk based and leverage capital ratios were 18.80%, 17.54% and 10.69%, respectively, as compared to total risk-based, Tier 1 risk based and leverage capital ratios of 18.99%, 17.73% and 10.31% as of March 31, 2012. We believe by all measurements our capital ratios remain well above regulatory requirements to be considered “well capitalized” by the regulators.

Interest Rate Risk. Interest rate risk results when the maturity or re-pricing intervals of interest-earning assets and interest-bearing liabilities are different. Our exposure to interest rate risk is managed primarily through our strategy of selecting the types and terms of interest-earning assets and interest-bearing liabilities that generate favorable earnings while limiting the potential negative effects of changes in market interest rates. We use no off-balance-sheet financial instruments to manage or hedge interest rate risk.

Our subsidiary bank has an asset liability management committee that monitors interest rate risk and compliance with investment policies. The subsidiary bank utilizes an earnings simulation model as the primary quantitative tool in measuring the amount of interest rate risk associated with changing market rates. The model quantifies the effects of various interest rate scenarios on projected net interest income and net income over the next twelve months. The model measures the impact on net interest income relative to a base case scenario of hypothetical fluctuations in interest rates over the next twelve months. These simulations incorporate assumptions regarding balance sheet growth and mix, pricing and the re-pricing and maturity characteristics of the existing and projected balance sheet.

As of March 31, 2013, the model simulations projected that 100 and 200 basis point increases in interest rates would result in positive variances in net interest income of 0.92% and 1.84%, respectively, relative to the base case over the next twelve months, while decreases in interest rates of 50 basis points would result in a negative variance in net interest income of 2.76% relative to the base case over the next twelve months. The likelihood of a decrease in interest rates beyond 50 basis points as of March 31, 2013 is considered remote given current interest rate levels. These are good faith estimates and assume that the composition of our interest sensitive assets and liabilities existing at each year-end will remain constant over the relevant twelve month measurement period and that changes in market interest rates are instantaneous and sustained across the yield curve regardless of duration of pricing characteristics of specific assets or liabilities. Also, this analysis does not contemplate any actions that we might undertake in response to changes in market interest rates. We believe these estimates are not necessarily indicative of what actually could occur in the event of immediate interest rate increases or decreases of this magnitude. As interest-bearing assets and liabilities re-price in different time frames and proportions to market interest rate movements, various assumptions must be made based on historical relationships of these variables in reaching any conclusion. Since these correlations are based on competitive and market conditions, we anticipate that our future results will likely be different from the foregoing estimates, and such differences could be material.

Should we be unable to maintain a reasonable balance of maturities and re-pricing of our interest-earning assets and our interest-bearing liabilities, we could be required to dispose of our assets in an unfavorable manner or pay a higher than market rate to fund our activities. Our asset liability committee oversees and monitors this risk.

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Liquidity

Liquidity is our ability to meet cash demands as they arise. Such needs can develop from loan demand, deposit withdrawals or acquisition opportunities. Potential obligations resulting from the issuance of standby letters of credit and commitments to fund future borrowings to our loan customers are other factors affecting our liquidity needs. Many of these obligations and commitments are expected to expire without being drawn upon; therefore the total commitment amounts do not necessarily represent future cash requirements affecting our liquidity position. The potential need for liquidity arising from these types of financial instruments is represented by the contractual notional amount of the instrument. Asset liquidity is provided by cash and assets which are readily marketable or which will mature in the near future. Liquid assets include cash, federal funds sold, and short-term investments in time deposits in banks. Liquidity is also provided by access to funding sources, which include core depositors and correspondent banks that maintain accounts with and sell federal funds to our subsidiary banks. Other sources of funds include our ability to borrow from short-term sources, such as purchasing federal funds from correspondent banks and sales of securities under agreements to repurchase, which amounted to $263.3 million at March 31, 2013, and an unfunded $25.0 million line of credit established with The Frost Bank which matures on June 30, 2013 (see next paragraph). Our bank also has federal funds purchased lines of credit with two non-affiliated banks totaling $80.0 million. No balance was outstanding on these federal funds purchased lines of credit at March 31, 2013. Our subsidiary bank has available lines of credit with the Federal Home Loan Bank of Dallas totaling $424.7 million secured by portions of their loan portfolios and certain investment securities. At March 31, 2013, $68.6 million in letters of credit issued by the Federal Home Loan Bank of Dallas were outstanding under these lines of credit, and there were no amounts outstanding in short-term borrowings under these lines. The letters of credit were pledged as collateral for public funds held by our bank.

The Company renewed its loan agreement, effective June 30, 2011, with Frost Bank. Under the loan agreement, as renewed and amended, we are permitted to draw up to $25.0 million on a revolving line of credit. Prior to June 30, 2013, interest is paid quarterly at Wall Street Journal Prime, and the line of credit matures June 30, 2013. If a balance exists at June 30, 2013, the principal balance converts to a term facility payable quarterly over five years and interest is paid quarterly at our election at Wall Street Journal Prime plus 50 basis points or LIBOR plus 250 basis points. The line of credit is unsecured. Among other provisions in the credit agreement, we must satisfy certain financial covenants during the term of the loan agreement, including, without limitation, covenants that require us to maintain certain capital, tangible net worth, loan loss reserve, non-performing asset and cash flow coverage ratio. In addition, the credit agreement contains certain operational covenants, which among others, restricts the payment of dividends above 55% of consolidated net income, limits the incurrence of debt (excluding any amounts acquired in an acquisition) and prohibits the disposal of assets except in the ordinary course of business. Since 1995, we have historically declared dividends as a percentage of our consolidated net income in a range of 37% (low) in 1995 to 53% (high) in 2003 and 2006. Management believes the Company was in compliance with the financial and operational covenants at March 31, 2013. There was no outstanding balance under the line of credit as of March 31, 2013, or December 31, 2012.

In addition, we anticipate that future acquisition of financial institutions, expansion of branch locations or offering of new products could also place a demand on our cash resources. Available cash and interest-bearing deposits in banks which totaled $69.9 million at March 31, 2013, investment securities which totaled $12.5 million which matures over 10 to 17 years, available dividends from our subsidiaries which totaled $43.6 million at March 31, 2013, utilization of available lines of credit, and future debt or equity offerings are expected to be the source of funding for these potential acquisitions or expansions. Existing cash resources at our subsidiary bank may also be used as a source of funding for these potential acquisitions or expansions.

Given the strong core deposit base, relatively low loan to deposit ratios maintained at our subsidiary bank, available lines of credit, and dividend capacity of our subsidiary bank, we consider our current liquidity position to be adequate to meet our short- and long-term liquidity needs.

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Off-Balance Sheet Arrangements. We are a party to financial instruments with off-balance-sheet risk in the normal course of business to meet the financing needs of our customers. These financial instruments include unfunded lines of credit, commitments to extend credit and Federal funds sold and standby letters of credit. Those instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in our consolidated balance sheets.

Our exposure to credit loss in the event of nonperformance by the counterparty to the financial instrument for unfunded lines of credit, commitments to extend credit and standby letters of credit is represented by the contractual notional amount of these instruments. We generally use the same credit policies in making commitments and conditional obligations as we do for on-balance-sheet instruments.

Unfunded lines of credit and commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. These commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. We evaluate each customer’s creditworthiness on a case-by-case basis. The amount of collateral obtained, as we deem necessary upon extension of credit, is based on our credit evaluation of the counterparty. Collateral held varies but may include accounts receivable, inventory, property, plant, and equipment and income-producing commercial properties.

Standby letters of credit are conditional commitments we issue to guarantee the performance of a customer to a third party. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loan facilities to customers. The average collateral value held on letters of credit usually exceeds the contract amount.

Table 10 – Commitments as of March 31, 2013 (in thousands):

	Total Notional Amounts Committed
Unfunded lines of credit	$	375,202
Unfunded commitments to extend credit		106,700
Standby letters of credit		20,175
Total commercial commitments	$	502,077

We believe we have no other off-balance sheet arrangements or transactions with unconsolidated, special purpose entities that would expose us to liability that is not reflected on the face of the financial statements.

Parent Company Funding. Our ability to fund various operating expenses, dividends to shareholders, and cash acquisitions is generally dependent on our own earnings (without giving effect to our subsidiaries), cash reserves and funds derived from our subsidiaries. These funds historically have been produced by dividends from our subsidiaries and management fees that are limited to reimbursement of actual expenses. We anticipate that our recurring cash sources will continue to include dividends and management fees from our subsidiaries. At March 31, 2013, approximately $43.6 million was available for the payment of intercompany dividends by our subsidiaries without the prior approval of regulatory agencies. Our subsidiaries paid aggregate dividends of $15.4 million and $13.9 million for the three month periods ended March 31, 2013 and 2012, respectively.

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Dividends. Our long-term dividend policy is to pay cash dividends to our shareholders of between 40% and 55% of net earnings while maintaining adequate capital to support growth. The cash dividend payout ratios have amounted to 42.4% and 42.5% of net earnings, respectively, for the first three months of 2013 and the same period in 2012. Given our current capital position and projected earnings and asset growth rates, we do not anticipate any significant change in our current dividend policy.

Our bank subsidiary is required by federal law to obtain the prior approval of the Office of the Comptroller of the Currency (the “OCC”), to declare and pay dividends if the total of all dividends declared in any calendar year would exceed the total of (1) such bank’s net profits (as defined and interpreted by regulation) for that year plus (2) its retained net profits (as defined and interpreted by regulation) for the preceding two calendar years, less any required transfers to surplus. In addition, our bank may only pay dividends to the extent that retained net profits (including the portion transferred to surplus) exceed bad debts (as defined by regulation).

To pay dividends, we and our subsidiaries must maintain adequate capital above regulatory guidelines. In addition, if the applicable regulatory authority believes that our subsidiary under its jurisdiction is engaged in or is about to engage in an unsafe or unsound practice (which, depending on the financial condition of the subsidiary, could include the payment of dividends), the authority may require, after notice and hearing, that such bank cease and desist from the unsafe practice. The Federal Reserve, the FDIC and the OCC have each indicated that paying dividends that deplete a bank’s capital base to an inadequate level would be an unsafe and unsound banking practice. The Federal Reserve, the OCC and the FDIC have issued policy statements that recommend that bank holding companies and insured banks should generally only pay dividends out of current operating earnings.

Item 3. Quantitative and Qualitative Disclosures About Market Risk

Management considers interest rate risk to be a significant market risk for the Company. See “Item 2—Management’s Discussion and Analysis of Financial Condition and Results of Operations – Capital Resources—Interest Rate Risk” for disclosure regarding this market risk.

Item 4. Controls and Procedures

As of March 31, 2013, we carried out an evaluation, under the supervision and with the participation of our management, including our principal executive officer and principal financial officer, of the effectiveness of the design and operation of our disclosure controls and procedures pursuant to Rule 13a-15 of the Securities Exchange Act of 1934. Our management, which includes our principal executive officer and our principal financial officer, does not expect that our disclosure controls and procedures will prevent all errors and all fraud.

A control system, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. Further, the design of a control system must reflect the fact that there are resource constraints; additionally, the benefits of controls must be considered relative to their costs. Because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if any, within the Company have been detected. These inherent limitations include the realities that judgments in decision-making can be faulty, and that breakdowns can occur because of simple error or mistake. Additionally, controls can be circumvented by the individual acts of some persons, by collusion of two or more people, or by management override of the controls. The design of any system of controls also is based, in part, upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions. Over time, controls may

38

become inadequate due to changes in conditions; also the degree of compliance with policies or procedures may deteriorate. Because of the inherent limitations in a cost-effective control system, misstatements due to error or fraud may occur and not be detected. Our principal executive officer and principal financial officer have concluded based on our evaluation of our disclosure controls and procedures, that our disclosure controls and procedures, as defined under Rule 13a-15 of the Securities Exchange Act of 1934, are effective at the reasonable assurance level as of March 31, 2013.

There were no significant changes in our internal controls over financial reporting or other factors during the first quarter of 2013 that have materially affected, or are reasonably likely to materially affect, these internal controls.

39

PART II

OTHER INFORMATION

Item 1. Legal Proceedings

From time to time we and our subsidiary banks are parties to lawsuits arising in the ordinary course of our banking business. However, there are no material pending legal proceedings to which we, our subsidiary banks or our other direct and indirect subsidiaries, or any of their properties, are currently subject. Other than regular, routine examinations by state and federal banking authorities, there are no proceedings pending or known to be contemplated by any governmental authorities.

Item 1A. Risk Factors

There has been no material change in the risk factors previously disclosed under Item 1A. of the Company’s 2012 Form 10-K.

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

None

Item 3. Defaults Upon Senior Securities

Not Applicable

Item 4. Mine Safety Disclosures

Not Applicable

Item 5. Other Information

None

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Item 6. Exhibits

The following exhibits are filed as part of this report:

3.1	—	Amended and Restated Certificate of Formation (incorporated by reference from Exhibit 3.1 of the Registrant’s Form 8-K filed April 25, 2012).
3.2	—	Amended and Restated Bylaws of the Registrant (incorporated by reference from Exhibit 3.2 of the Registrant’s Form 8-K filed January 24, 2012).
4.1	—	Specimen certificate of First Financial Common Stock (incorporated by reference from Exhibit 3 of the Registrant’s Amendment No. 1 to Form 8-A filed on Form 8-A/A No. 1 on January 7, 1994).
10.1	—	Executive Recognition Agreement (incorporated by reference from Exhibit 10.1 of the Registrant’s Form 8-K Report filed June 29, 2012).
10.2	—	2002 Incentive Stock Option Plan (incorporated by reference from Exhibit 10.3 of the Registrant’s Form 10-Q filed May 4, 2010).
10.3	—	2012 Incentive Stock Option Plan (incorporated by reference from Appendix A of the Registrant’s Definitive Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 filed March 1, 2012).
10.4	—	Loan agreement dated December 31, 2004, between First Financial Bankshares, Inc. and The Frost National Bank (incorporated by reference from Exhibit 10.4 of the Registrant’s Form 10-Q filed May 4, 2010).
10.5	—	First Amendment to Loan Agreement, dated December 28, 2005, between First Financial Bankshares, Inc. and The Frost National Bank (incorporated by reference from Exhibit 10.5 of the Registrant’s Form 10-Q Quarterly Report filed August 2, 2011).
10.6	—	Second Amendment to Loan Agreement, dated December 31, 2006, between First Financial Bankshares, Inc. and The Frost National Bank (incorporated by reference from Exhibit 10.6 of the Registrant’s Form 10-Q Quarterly Report filed October 31, 2012).
10.7	—	Third Amendment to Loan Agreement, dated December 31, 2007, between First Financial Bankshares, Inc. and The Frost National Bank (incorporated by reference from Exhibit 10.4 of the Registrant’s Form 8-K filed January 2, 2008).
10.8	—	Fourth Amendment to Loan Agreement, dated July 24, 2008, between First Financial Bankshares, Inc. and The Frost National Bank (incorporated by reference from Exhibit 10.10 of the Registrant’s Form 10-Q Quarterly Report filed July 25, 2008).
10.9	—	Fifth Amendment to Loan Agreement, dated December 19, 2008, between First Financial Bankshares, Inc. and The Frost National Bank (incorporated by reference from Exhibit 10.6 of the Registrant’s Form 8-K filed December 23, 2008).
10.10	—	Sixth Amendment to Loan Agreement, dated June 16, 2009, signed June 30, 2009, between First Financial Bankshares, Inc. and The Frost National Bank (incorporated by reference from Exhibit 10.7 of the Registrant’s Form 8-K filed on July 1, 2009).
10.11	—	Seventh Amendment to Loan Agreement, dated December 30, 2009, between First Financial Bankshares, Inc. and The Frost National Bank (incorporated by reference from Exhibit 10.8 of the Registrant’s Form 8-K filed December 31, 2009).
10.12	—	Eighth Amendment to Loan Agreement, dated June 30, 2011, between First Financial Bankshares, Inc. and The Frost National Bank (incorporated by reference from Exhibit 10-9 of the Registrant’s Form 8-K filed June 30, 2011).
31.1	—	Rule 13a-14(a) / 15(d)-14(a) Certification of Chief Executive Officer of First Financial Bankshares, Inc.*
31.2	—	Rule 13a-14(a) / 15(d)-14(a) Certification of Chief Financial Officer of First Financial Bankshares, Inc.*
32.1	—	Section 1350 Certification of Chief Executive Officer of First Financial Bankshares, Inc.*
32.2	—	Section 1350 Certification of Chief Financial Officer of First Financial Bankshares, Inc.*

* Filed herewith

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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.

	FIRST FINANCIAL BANKSHARES, INC.
Date: April 26, 2013	By:	/s/ F. Scott Dueser
		F. Scott Dueser
		President and Chief Executive Officer
Date: April 26, 2013	By:	/s/ J. Bruce Hildebrand
		J. Bruce Hildebrand
		Executive Vice President and
		Chief Financial Officer

42

EX-31.1

Exhibit 31.1

Certification of

Chief Executive Officer

of First Financial Bankshares, Inc.

I, F. Scott Dueser, President and Chief Executive Officer of First Financial Bankshares, Inc., certify that:

1. I have reviewed this Form 10-Q of First Financial Bankshares, Inc.;

2. Based on my knowledge, this quarterly 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 quarterly 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 effectives 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: April 26, 2013

By:	/s/ F. SCOTT DUESER
	F. Scott Dueser
	President and Chief Executive Officer

EX-31.2

Exhibit 31.2

Certification of

Chief Financial Officer

of First Financial Bankshares, Inc.

I, J. Bruce Hildebrand, Executive Vice President and Chief Financial Officer of First Financial Bankshares, Inc., certify that:

1. I have reviewed this Form 10-Q of First Financial Bankshares, Inc.;

2. Based on my knowledge, this quarterly 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 quarterly 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 effectives 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: April 26, 2013

By:	/s/ J. Bruce Hildebrand
	J. Bruce Hildebrand
	Executive Vice President and Chief
	Financial Officer

EX-32.1

Exhibit 32.1

Certification of

Chief Executive Officer

of First Financial Bankshares, Inc.

This certification is provided pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a) and (b) of Section 1350, Chapter 63 of Title 18, United States Code) and accompanies the quarterly report on Form 10-Q (the “Form 10-Q”) for the quarter ended March 31, 2013 of First Financial Bankshares, Inc. (the “Company”).

I, F. Scott Dueser, the President and Chief Executive Officer of the Company, certify that:

1. the Form 10-Q fully complies with the requirements of section 13(a) or section 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m(a) or 78o(d)); and

2. the information contained in the Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: April 26, 2013

By:	/s/ F. SCOTT DUESER
	F. Scott Dueser
	Chief Executive Officer

Subscribed and sworn to before me this 26th day of April, 2013.

/s/ Vickie L. Sadler

Vickie L. Sadler

Notary Public

My commission expires: November 25, 2014

EX-32.2

Exhibit 32.2

Certification of

Chief Financial Officer

of First Financial Bankshares, Inc.

This certification is provided pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a) and (b) of Section 1350, Chapter 63 of Title 18, United States Code) and accompanies the quarterly report on Form 10-Q (the “Form 10-Q”) for the quarter ended March 31, 2013 of First Financial Bankshares, Inc. (the “Company”).

I, J. Bruce Hildebrand, the Executive Vice President and Chief Financial Officer of the Company, certify that:

1. the Form 10-Q fully complies with the requirements of section 13(a) or section 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m(a) or 78o(d)); and

2. the information contained in the Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: April 26, 2013

By:	/s/ J. Bruce Hildebrand
	J. Bruce Hildebrand
	Chief Financial Officer

Subscribed and sworn to before me this 26th day of April, 2013.

/s/ Vickie L. Sadler

Vickie L. Sadler

Notary Public

My commission expires: November 25, 2014

XML

Loans and Allowance for Loan Losses - Changes in Allowance for Loan Losses (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	$ 34,839	$ 34,315
Provision for loan losses	401	1,296
Recoveries	255	323
Charge-offs	(823)	(1,405)
Ending balance	34,672	34,529
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	7,343	9,664
Provision for loan losses	(672)	94
Recoveries	121	103
Charge-offs	(288)	(249)
Ending balance	6,504	9,612
Agricultural [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	1,541	1,482
Provision for loan losses	(86)	(119)
Recoveries	11	12
Charge-offs		(22)
Ending balance	1,466	1,353
Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	24,063	21,533
Provision for loan losses	1,120	1,161
Recoveries	28	113
Charge-offs	(350)	(972)
Ending balance	24,861	21,835
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	1,892	1,636
Provision for loan losses	39	160
Recoveries	95	95
Charge-offs	(185)	(162)
Ending balance	$ 1,841	$ 1,729

XML

Fair Value Disclosures - Additional Information (Detail) (USD $)				3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Mar. 31, 2013 Minimum [Member]	Mar. 31, 2013 Maximum [Member]
Fair Value Inputs Assets And Liabilities Quantitative Information [Line Items]
Impaired loans carrying value	$ 22,509,000
Impaired loans valuation reserves	5,793,000
Impaired loans net fair value	16,716,000
Debt discounts, percentage				5.00%	25.00%
Other real estate owned, total	$ 3,052,000	$ 3,505,000	$ 7,815,000

XML

Pension Plan - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Compensation And Retirement Disclosure [Abstract]
Contribution towards pension plan	$ 0	$ 2,000,000
Net periodic benefit costs, total	$ 208,000	$ 185,000

XML

Loans and Allowance for Loan Losses - Schedule of Non-Accrual Loans (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	$ 22,509	$ 21,800	$ 20,963
Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	1,133	2,251	3,665
Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	473	372	923
Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	20,502	18,698	16,026
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	$ 401	$ 479	$ 349

XML

Interest-bearing Time Deposits in Banks and Securities - Additional Information (Detail) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Interest Bearing Time Deposits In Banks And Securities [Line Items]
INTEREST-BEARING TIME DEPOSITS IN BANKS	$ 45,172,000	$ 62,018,000	$ 49,005,000
Time deposits with balances greater than $100,000	40,943,000		44,776,000
Time deposits balances	100,000		100,000
Number of investment positions	108
Securities pledged as collateral	870,328,000
Sales of investment securities available-for-sale	5,227,000	21,003,000
Gross realized gains from securities sales and calls	223,000	346,000
Gross realized losses from securities sales and calls	$ 1,000	$ 0
Minimum [Member]
Interest Bearing Time Deposits In Banks And Securities [Line Items]
Interesting-bearing time deposits, maturity period, years	One
Maximum [Member]
Interest Bearing Time Deposits In Banks And Securities [Line Items]
Interesting-bearing time deposits, maturity period, years	Two

XML

Fair Value Disclosures - Schedule of Estimated Fair Values and Carrying Values of All Financial Instruments Under Current Authoritative Guidance (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	$ 113,958	$ 207,018	$ 131,163
FEDERAL FUNDS SOLD	3,175	14,045	11,200
INTEREST-BEARING DEPOSITS IN BANKS	20,065	139,676	84,169
INTEREST-BEARING TIME DEPOSITS IN BANKS	45,172	49,005	62,018
Available-for-sale securities	1,958,151	1,819,035	1,960,760
Held-to-maturity securities	903	1,061	2,581
Loans	2,103,465	2,053,784	1,764,338
Short term borrowings	263,345	259,697	237,567
Carrying Value [Member] | Level 1 Inputs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	113,958	207,018
FEDERAL FUNDS SOLD	3,175	14,045
INTEREST-BEARING DEPOSITS IN BANKS	20,065	139,676
Deposits with no stated maturities	2,929,278	2,995,544
Carrying Value [Member] | Level 2 Inputs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
INTEREST-BEARING TIME DEPOSITS IN BANKS	45,172	49,005
Held-to-maturity securities	903	1,061
Accrued interest receivable	20,904	23,122
Deposits with stated maturities	620,848	637,040
Short term borrowings	263,345	259,697
Accrued interest payable	239	287
Carrying Value [Member] | Level 1 and 2 Inputs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities	1,958,151	1,819,035
Carrying Value [Member] | Level 3 Inputs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	2,103,465	2,053,784
Estimated Fair Value [Member] | Level 1 Inputs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	113,958	207,018
FEDERAL FUNDS SOLD	3,175	14,045
INTEREST-BEARING DEPOSITS IN BANKS	20,065	139,676
Deposits with no stated maturities	2,929,278	2,995,544
Estimated Fair Value [Member] | Level 2 Inputs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
INTEREST-BEARING TIME DEPOSITS IN BANKS	45,415	49,288
Held-to-maturity securities	920	1,080
Accrued interest receivable	20,904	23,122
Deposits with stated maturities	621,946	638,227
Short term borrowings	263,345	259,697
Accrued interest payable	239	287
Estimated Fair Value [Member] | Level 1 and 2 Inputs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities	1,958,151	1,819,035
Estimated Fair Value [Member] | Level 3 Inputs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	$ 2,120,669	$ 2,081,091

XML

Loans and Allowance for Loan Losses - Schedule of How Loans Were Modified as Troubled Debt Restructured Loans (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Troubled Debt Restructured Loan Modifications by Class [Line Items]
Adjusted Interest Rate	$ 272	$ 17
Extended Maturity	494	75
Combined Rate and Maturity	174	3,946
Commercial [Member]
Troubled Debt Restructured Loan Modifications by Class [Line Items]
Adjusted Interest Rate		17
Extended Maturity	120	62
Combined Rate and Maturity		48
Agricultural [Member]
Troubled Debt Restructured Loan Modifications by Class [Line Items]
Adjusted Interest Rate
Extended Maturity	24	13
Combined Rate and Maturity		95
Real Estate [Member]
Troubled Debt Restructured Loan Modifications by Class [Line Items]
Adjusted Interest Rate	272
Extended Maturity	350
Combined Rate and Maturity	174	3,803
Consumer [Member]
Troubled Debt Restructured Loan Modifications by Class [Line Items]
Adjusted Interest Rate
Extended Maturity
Combined Rate and Maturity

XML

Loans and Allowance for Loan Losses - Allowance for Loan Losses by Estimating Probable Losses in Various Categories of Loan Portfolio (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Dec. 31, 2011
Receivables [Abstract]
Loans specifically evaluated as impaired	$ 5,793	$ 6,010	$ 5,357
Remaining portfolio	28,879	28,829	29,172
Total allowance for loan losses	$ 34,672	$ 34,839	$ 34,529	$ 34,315

XML

Fair Value Disclosures - Financial Assets and Financial Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value	$ 1,958,151
U.S. Treasury securities [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value	6,039
Obligations of U.S. government sponsored-enterprises and agencies [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value	193,364
Obligations of states and political subdivisions [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value	917,915
Corporate bonds and other [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value	113,067
Residential mortgage-backed securities [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value	616,566
Commercial mortgage-backed securities [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value	107,045
Other securities [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value	4,155
Level 1 Inputs [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value	161,959
Level 1 Inputs [Member] | U.S. Treasury securities [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value	6,039
Level 1 Inputs [Member] | Obligations of U.S. government sponsored-enterprises and agencies [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value	16,844
Level 1 Inputs [Member] | Obligations of states and political subdivisions [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value	86,393
Level 1 Inputs [Member] | Corporate bonds and other [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value
Level 1 Inputs [Member] | Residential mortgage-backed securities [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value	37,972
Level 1 Inputs [Member] | Commercial mortgage-backed securities [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value	10,556
Level 1 Inputs [Member] | Other securities [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value	4,155
Level 2 Inputs [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value	1,796,192
Level 2 Inputs [Member] | U.S. Treasury securities [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value
Level 2 Inputs [Member] | Obligations of U.S. government sponsored-enterprises and agencies [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value	176,520
Level 2 Inputs [Member] | Obligations of states and political subdivisions [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value	831,522
Level 2 Inputs [Member] | Corporate bonds and other [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value	113,067
Level 2 Inputs [Member] | Residential mortgage-backed securities [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value	578,594
Level 2 Inputs [Member] | Commercial mortgage-backed securities [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value	96,489
Level 2 Inputs [Member] | Other securities [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value
Level 3 Inputs [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value
Level 3 Inputs [Member] | U.S. Treasury securities [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value
Level 3 Inputs [Member] | Obligations of U.S. government sponsored-enterprises and agencies [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value
Level 3 Inputs [Member] | Obligations of states and political subdivisions [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value
Level 3 Inputs [Member] | Corporate bonds and other [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value
Level 3 Inputs [Member] | Residential mortgage-backed securities [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value
Level 3 Inputs [Member] | Commercial mortgage-backed securities [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value
Level 3 Inputs [Member] | Other securities [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value

XML

CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Earnings	$ 18,577	$ 17,756
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	2,007	1,887
PROVISION FOR LOAN LOSSES	401	1,296
Securities premium amortization (discount accretion), net	4,208	3,610
Gain on sale of assets, net	(74)	(474)
Deferred federal income tax expense (benefit)		(4)
Change in loans held for sale	1,334	4,934
Change in other assets	8,732	1,842
Change in other liabilities	7,440	5,897
Total adjustments	24,048	18,988
Net cash provided by operating activities	42,625	36,744
CASH FLOWS FROM INVESTING ACTIVITIES:
Net decrease (increase) in interest-bearing time deposits in banks	3,833	(843)
Activity in available-for-sale securities:
Sales	5,227	21,003
Maturities	94,803	76,390
Purchases	(236,984)	(222,889)
Activity in held-to-maturity securities - maturities	158	1,028
Net increase in loans	(51,454)	(18,162)
Purchases of bank premises and equipment and other assets	(4,567)	(5,063)
Proceeds from sale of other assets	1,015	1,555
Net cash used in investing activities	(187,969)	(146,981)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase (decrease) in noninterest-bearing deposits	(73,868)	24,001
Net increase (decrease) in interest-bearing deposits	(8,590)	39,272
Net increase in short-term borrowings	3,648	29,811
Common stock transactions:
Proceeds from stock issuances	613	399
Dividends paid		(7,550)
Net cash provided by (used in) financing activities	(78,197)	85,933
NET DECREASE IN CASH AND CASH EQUIVALENTS	(223,541)	(24,304)
CASH AND CASH EQUIVALENTS, beginning of period	360,739	250,836
CASH AND CASH EQUIVALENTS, end of period	137,198	226,532
SUPPLEMENTAL INFORMATION AND NONCASH TRANSACTIONS
Interest paid	953	1,653
Federal income tax paid
Transfer of loans to foreclosed assets	39	82
Investment securities purchased but not settled	$ 21,095	$ 21,895

XML

Loans and Allowance for Loan Losses - Schedule of Troubled Debt Restructuring (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013 Contract
Troubled Debt Restructured Loan Modifications by Class [Line Items]
Number	11
Balance	$ 1,167
Commercial [Member]
Troubled Debt Restructured Loan Modifications by Class [Line Items]
Number	5
Balance	217
Agricultural [Member]
Troubled Debt Restructured Loan Modifications by Class [Line Items]
Number
Balance
Real Estate [Member]
Troubled Debt Restructured Loan Modifications by Class [Line Items]
Number	5
Balance	931
Consumer [Member]
Troubled Debt Restructured Loan Modifications by Class [Line Items]
Number	1
Balance	$ 19

XML

Loans and Allowance for Loan Losses - Additional Information (Detail) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2013 Contract	Mar. 31, 2012	Dec. 31, 2012
Receivables [Abstract]
Minimum number of days to consider the loans as non-accrual	90 days
Loans held for sale	$ 10,122,000	$ 5,695,000	$ 11,457,000
Average recorded investment in impaired loans	23,163,000	21,957,000	24,025,000
Non-accrual loans still accruing, past due 90 days, restructured loans and foreclosed assets	25,718,000	28,868,000	25,462,000
Non-accrual loans	22,509,000	20,963,000	21,800,000
Interest income recognized on impaired loans			384,000
Number of loans	11
Troubled debt restructured loan	1,167,000
Default for purposes of this disclosure is a troubled debt restructured loan	90 days
Loans held by subsidiaries subject to blanket liens	1,118,519,000
Letters of credit outstanding, amount	$ 68,600,000

XML

Interest-bearing Time Deposits in Banks and Securities - Continuous Unrealized-Loss Position of Available-For-Sale and Held-To-Maturity Securities (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Schedule Of Available For Sale And Held To Maturity Securities Continuous Unrealized Loss Position [Line Items]
Available-for-sale and held-to-maturity securities, continuous unrealized loss position Less than 12 Months, Fair Value	$ 89,238	$ 71,271
Available-for-sale and held-to-maturity securities, continuous unrealized loss position Less than 12 Months, Unrealized Loss	1,827	853
Available-for-sale and held-to-maturity securities, continuous unrealized loss position 12 Months or Longer, Fair Value	14,885	3,574
Available-for-sale and held-to-maturity securities, continuous unrealized loss position 12 Months or Longer, Unrealized Loss	204	42
Available-for-sale and held-to-maturity securities, continuous unrealized loss position, Fair Value	104,123	74,845
Available-for-sale and held-to-maturity securities, continuous unrealized loss position, Unrealized Loss	2,031	895
Obligations of states and political subdivisions [Member]
Schedule Of Available For Sale And Held To Maturity Securities Continuous Unrealized Loss Position [Line Items]
Available-for-sale and held-to-maturity securities, continuous unrealized loss position Less than 12 Months, Fair Value	42,102	36,480
Available-for-sale and held-to-maturity securities, continuous unrealized loss position Less than 12 Months, Unrealized Loss	558	129
Available-for-sale and held-to-maturity securities, continuous unrealized loss position 12 Months or Longer, Fair Value
Available-for-sale and held-to-maturity securities, continuous unrealized loss position 12 Months or Longer, Unrealized Loss
Available-for-sale and held-to-maturity securities, continuous unrealized loss position, Fair Value	42,102	36,480
Available-for-sale and held-to-maturity securities, continuous unrealized loss position, Unrealized Loss	558	129
Residential mortgage-backed securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities Continuous Unrealized Loss Position [Line Items]
Available-for-sale and held-to-maturity securities, continuous unrealized loss position Less than 12 Months, Fair Value	8,664	17,344
Available-for-sale and held-to-maturity securities, continuous unrealized loss position Less than 12 Months, Unrealized Loss	9	401
Available-for-sale and held-to-maturity securities, continuous unrealized loss position 12 Months or Longer, Fair Value	14,885	3,574
Available-for-sale and held-to-maturity securities, continuous unrealized loss position 12 Months or Longer, Unrealized Loss	204	42
Available-for-sale and held-to-maturity securities, continuous unrealized loss position, Fair Value	23,549	20,918
Available-for-sale and held-to-maturity securities, continuous unrealized loss position, Unrealized Loss	213	443
Commercial mortgage-backed securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities Continuous Unrealized Loss Position [Line Items]
Available-for-sale and held-to-maturity securities, continuous unrealized loss position Less than 12 Months, Fair Value	38,472	12,453
Available-for-sale and held-to-maturity securities, continuous unrealized loss position Less than 12 Months, Unrealized Loss	1,260	250
Available-for-sale and held-to-maturity securities, continuous unrealized loss position 12 Months or Longer, Fair Value
Available-for-sale and held-to-maturity securities, continuous unrealized loss position 12 Months or Longer, Unrealized Loss
Available-for-sale and held-to-maturity securities, continuous unrealized loss position, Fair Value	38,472	12,453
Available-for-sale and held-to-maturity securities, continuous unrealized loss position, Unrealized Loss	1,260	250
Corporate bonds and other [Member]
Schedule Of Available For Sale And Held To Maturity Securities Continuous Unrealized Loss Position [Line Items]
Available-for-sale and held-to-maturity securities, continuous unrealized loss position Less than 12 Months, Fair Value		4,994
Available-for-sale and held-to-maturity securities, continuous unrealized loss position Less than 12 Months, Unrealized Loss		73
Available-for-sale and held-to-maturity securities, continuous unrealized loss position 12 Months or Longer, Fair Value
Available-for-sale and held-to-maturity securities, continuous unrealized loss position 12 Months or Longer, Unrealized Loss
Available-for-sale and held-to-maturity securities, continuous unrealized loss position, Fair Value		4,994
Available-for-sale and held-to-maturity securities, continuous unrealized loss position, Unrealized Loss		$ 73

XML

Income Taxes - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Income Tax Disclosure [Abstract]
INCOME TAX EXPENSE	$ 6,182	$ 6,035
Effective tax rates on pretax income	25.00%	25.40%
Statutory federal tax rate	35.00%

XML

Loans and Allowance for Loan Losses - Major Classifications of Loans Held for Investment (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
Receivables [Abstract]
Commercial	$ 513,422	$ 509,609	$ 433,351
Agricultural	55,247	68,306	57,977
Real estate	1,275,564	1,226,823	1,083,244
Consumer	283,782	272,428	218,600
Total	$ 2,128,015	$ 2,077,166	$ 1,793,172

XML

Loans and Allowance for Loan Losses - Non-Accrual Loans, Loans Still Accruing and Past Due 90 Days or More and Restructured Loans (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013		Dec. 31, 2012	Mar. 31, 2012
Receivables [Abstract]
Non-accrual loans	$ 22,509		$ 21,800	$ 20,963
Loans still accruing and past due 90 days or more	24		97	53
Restructured loans		[1]
Total	$ 22,533		$ 21,897	$ 21,016

[1] Restructured loans whose interest collection, after considering economic and business conditions and collection efforts, is doubtful are included in non-accrual loans.

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CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Statement Of Stockholders Equity [Abstract]
Cash dividend per share	$ 0.25	$ 0.24

XML

Loans and Allowance for Loan Losses - Recorded Investment in Impaired Loans and Related Valuation Allowance (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
Receivables [Abstract]
Recorded Investment	$ 22,509	$ 21,800	$ 20,963
Valuation Allowance	$ 5,793	$ 6,010	$ 5,357

XML

Loans and Allowance for Loan Losses - Schedule of Investment in Loans Related to Balance in Allowance for Loan Losses on Basis of Company's Impairment Methodology (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
Schedule Of Allowance For Credit Losses And Recorded Investment In Financing Receivables [Line Items]
Loans individually evaluated for impairment	$ 70,178	$ 67,137
Loans collectively evaluated for impairment	2,057,837	2,010,029
Total	2,128,015	2,077,166	1,793,172
Commercial [Member]
Schedule Of Allowance For Credit Losses And Recorded Investment In Financing Receivables [Line Items]
Loans individually evaluated for impairment	11,563	11,421
Loans collectively evaluated for impairment	501,859	498,188
Total	513,422	509,609
Agricultural [Member]
Schedule Of Allowance For Credit Losses And Recorded Investment In Financing Receivables [Line Items]
Loans individually evaluated for impairment	3,926	3,909
Loans collectively evaluated for impairment	51,321	64,397
Total	55,247	68,306
Real Estate [Member]
Schedule Of Allowance For Credit Losses And Recorded Investment In Financing Receivables [Line Items]
Loans individually evaluated for impairment	53,452	50,493
Loans collectively evaluated for impairment	1,222,112	1,176,330
Total	1,275,564	1,226,823
Consumer [Member]
Schedule Of Allowance For Credit Losses And Recorded Investment In Financing Receivables [Line Items]
Loans individually evaluated for impairment	1,237	1,314
Loans collectively evaluated for impairment	282,545	271,114
Total	$ 283,782	$ 272,428

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CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
ASSETS
Cash and due from banks	$ 113,958	$ 207,018	$ 131,163
FEDERAL FUNDS SOLD	3,175	14,045	11,200
INTEREST-BEARING DEPOSITS IN BANKS	20,065	139,676	84,169
Total cash and cash equivalents	137,198	360,739	226,532
INTEREST-BEARING TIME DEPOSITS IN BANKS	45,172	49,005	62,018
SECURITIES AVAILABLE-FOR-SALE, at fair value	1,958,151	1,819,035	1,960,760
SECURITIES HELD-TO-MATURITY (fair value of $920, $2,612 and $1,080 at March 31, 2013 and 2012 and December 31, 2012, respectively)	903	1,061	2,581
LOANS
Held for investment	2,128,015	2,077,166	1,793,172
Less - allowance for loan losses	(34,672)	(34,839)	(34,529)
Net loans held for investment	2,093,343	2,042,327	1,758,643
Held for sale	10,122	11,457	5,695
Net loans	2,103,465	2,053,784	1,764,338
BANK PREMISES AND EQUIPMENT, net	86,265	84,122	79,308
INTANGIBLE ASSETS	71,963	71,973	72,078
OTHER ASSETS	52,863	62,293	59,635
Total assets	4,455,980	4,502,012	4,227,250
LIABILITIES AND SHAREHOLDERS' EQUITY
NONINTEREST-BEARING DEPOSITS	1,237,840	1,311,708	1,125,577
INTEREST-BEARING DEPOSITS	2,312,286	2,320,876	2,272,495
Total deposits	3,550,126	3,632,584	3,398,072
DIVIDENDS PAYABLE	7,879		7,553
SHORT-TERM BORROWINGS	263,345	259,697	237,567
OTHER LIABILITIES	70,378	52,768	67,053
Total liabilities	3,891,728	3,945,049	3,710,245
COMMITMENTS AND CONTINGENCIES
SHAREHOLDERS' EQUITY
Common stock - $0.01 par value, authorized 80,000,000 shares; 31,519,973, 31,477,483, and 31,496,881 shares issued at March 31, 2013 and 2012 and December 31, 2012, respectively	315	315	315
Capital surplus	278,122	277,412	276,623
Retained earnings	238,625	227,927	195,074
Treasury stock (shares at cost: 268,348, 261,454, and 266,845 at March 31, 2013 and 2012 and December 31, 2012, respectively)	(5,138)	(5,007)	(4,712)
Deferred compensation	5,138	5,007	4,712
Accumulated other comprehensive earnings	47,190	51,309	44,993
Total shareholders' equity	564,252	556,963	517,005
Total liabilities and shareholders' equity	$ 4,455,980	$ 4,502,012	$ 4,227,250

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Stock Based Compensation - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock option expense	$ 88,000	$ 88,000

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CONSOLIDATED STATEMENTS OF COMPREHENSIVE EARNINGS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Statement Of Income And Comprehensive Income [Abstract]
Net Earnings	$ 18,577	$ 17,756
OTHER ITEMS OF COMPREHENSIVE EARNINGS:
Change in unrealized gain on investment securities available-for-sale, before income taxes	(6,115)	(3,088)
Reclassification adjustment for realized gains on investment securities included in net earnings, before income tax	(222)	(346)
Total other items of comprehensive earnings	(6,337)	(3,434)
Income tax expense related to other items of comprehensive earnings	2,218	1,202
COMPREHENSIVE EARNINGS	$ 14,458	$ 15,524

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Loans and Allowance for Loan Losses - Schedule of Internal Ratings of Loans Held for Investment (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	$ 2,128,015	$ 2,077,166	$ 1,793,172
Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	513,422	509,609
Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	55,247	68,306
Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	1,275,564	1,226,823
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	283,782	272,428
Pass [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	2,057,837	2,010,029
Pass [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	501,859	498,188
Pass [Member] | Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	51,321	64,397
Pass [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	1,222,112	1,176,330
Pass [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	282,545	271,114
Special Mention [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	17,784	17,597
Special Mention [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	2,083	2,193
Special Mention [Member] | Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	337	342
Special Mention [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	15,015	14,680
Special Mention [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	349	382
Substandard [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	52,182	49,341
Substandard [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	9,449	9,198
Substandard [Member] | Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	3,582	3,559
Substandard [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	38,281	35,673
Substandard [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	870	911
Doubtful [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	212	199
Doubtful [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	31	30
Doubtful [Member] | Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	7	8
Doubtful [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	156	140
Doubtful [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	$ 18	$ 21

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Fair Value Disclosures (Tables)

3 Months Ended

Mar. 31, 2013

Fair Value Disclosures [Abstract]

Financial Assets and Financial Liabilities Measured at Fair Value on Recurring Basis

The following table summarizes financial assets and financial liabilities measured at fair value on a recurring basis as of March 31, 2013, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value (dollars in thousands):

	Level 1 Inputs		Level 2 Inputs		Level 3 Inputs		Total Fair Value
Available-for-sale investment securities:
U. S. Treasury securities	$	6,039	$	—	$	—	$	6,039
Obligations of U. S. government sponsored-enterprises and agencies		16,844		176,520		—		193,364
Obligations of states and political subdivisions		86,393		831,522		—		917,915
Corporate bonds		—		113,067		—		113,067
Residential mortgage-backed securities		37,972		578,594		—		616,566
Commercial mortgage-backed securities		10,556		96,489		—		107,045
Other securities		4,155		—		—		4,155
Total	$	161,959	$	1,796,192	$	—	$	1,958,151

Other Real Estate Owned

The following table presents other real estate owned that were re-measured subsequent to their initial transfer to other real estate owned (dollars in thousands):

	Three months ended March 31,
	2013			2012
Carrying value of other real estate owned prior to re-measurement	$	1,827		$	417
Write-downs included in gain (loss) on sale of other real estate owned		(304	)		(101	)
Fair value	$	1,523		$	316

Schedule of Estimated Fair Values and Carrying Values of All Financial Instruments Under Current Authoritative Guidance

The estimated fair values and carrying values of all financial instruments under current authoritative guidance at March 31, 2013 and December 31, 2012, were as follows (in thousands):

	March 31,				December 31,
	2013				2012
	Carrying		Estimated		Carrying		Estimated		Fair Value
	Value		Fair Value		Value		Fair Value		Hierarchy
Cash and due from banks	$	113,958	$	113,958	$	207,018	$	207,018	Level 1
Federal funds sold		3,175		3,175		14,045		14,045	Level 1
Interest-bearing deposits in banks		20,065		20,065		139,676		139,676	Level 1
Interest-bearing time deposits in banks		45,172		45,415		49,005		49,288	Level 2
Available-for-sale securities		1,958,151		1,958,151		1,819,035		1,819,035	Levels 1 and 2
Held-to-maturity securities		903		920		1,061		1,080	Level 2
Loans		2,103,465		2,120,669		2,053,784		2,081,091	Level 3
Accrued interest receivable		20,904		20,904		23,122		23,122	Level 2
Deposits with stated maturities		620,848		621,946		637,040		638,227	Level 2
Deposits with no stated maturities		2,929,278		2,929,278		2,995,544		2,995,544	Level 1
Short term borrowings		263,345		263,345		259,697		259,697	Level 2
Accrued interest payable		239		239		287		287	Level 2

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Loans and Allowance for Loan Losses - Schedule of Past Due Loans (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013		Dec. 31, 2012		Mar. 31, 2012
Financing Receivable, Recorded Investment, Past Due [Line Items]
15-59 Days Past Due	$ 21,378	[1]	$ 13,976	[1]
60-89 Days Past Due	2,203		3,563
Greater Than 90 Days	2,334		1,647
Total Past Due	25,915		19,186
Total Current	2,102,100		2,057,980
Total	2,128,015		2,077,166		1,793,172
Total 90 Days Past Due Still Accruing	24		97		53
Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
15-59 Days Past Due	4,146	[1]	1,708	[1]
60-89 Days Past Due	307		470
Greater Than 90 Days	283		247
Total Past Due	4,736		2,425
Total Current	508,686		507,184
Total	513,422		509,609
Total 90 Days Past Due Still Accruing	3
Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
15-59 Days Past Due	641	[1]	467	[1]
60-89 Days Past Due	16		95
Greater Than 90 Days
Total Past Due	657		562
Total Current	54,590		67,744
Total	55,247		68,306
Total 90 Days Past Due Still Accruing
Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
15-59 Days Past Due	14,962	[1]	10,141	[1]
60-89 Days Past Due	1,653		2,711
Greater Than 90 Days	1,907		1,237
Total Past Due	18,522		14,089
Total Current	1,257,042		1,212,734
Total	1,275,564		1,226,823
Total 90 Days Past Due Still Accruing			34
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
15-59 Days Past Due	1,629	[1]	1,660	[1]
60-89 Days Past Due	227		287
Greater Than 90 Days	144		163
Total Past Due	2,000		2,110
Total Current	281,782		270,318
Total	283,782		272,428
Total 90 Days Past Due Still Accruing	$ 21		$ 63

[1] The Company monitors commercial, agricultural and real estate loans after such loans are 15 days past due. Consumer loans are monitored after such loans are 30 days past due.

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Earnings Per Share - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Earnings Per Share [Abstract]
Weighted average common shares outstanding, basic	31,507,975	31,466,706
Weighted average common shares outstanding, diluted	31,601,364	31,479,743

XML

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (USD $) In Thousands, except Share data	Total	Common Stock [Member]	Capital Surplus [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Deferred Compensation [Member]	Accumulated Other Comprehensive Earnings [Member]
Beginning Balance at Dec. 31, 2011	$ 508,537	$ 314	$ 276,127	$ 184,871	$ (4,597)	$ 4,597	$ 47,225
Beginning Balance, shares at Dec. 31, 2011		31,459,635			(258,235)
Net Earnings	17,756			17,756
Stock issuances	399	1	398
stock issuances, shares		17,848
Cash dividends declared	(7,553)			(7,553)
Change in unrealized gain in investment securities available-for-sale, net of related income taxes	(2,232)						(2,232)
Additional tax benefit related to directors' deferred compensation plan	10		10
Shares purchased in connection with directors' deferred compensation plan, net					(115)	115
Shares purchased in connection with directors' deferred compensation plan, net, shares					(3,219)
Stock option expense	88		88
Ending Balance at Mar. 31, 2012	517,005	315	276,623	195,074	(4,712)	4,712	44,993
Ending Balance, shares at Mar. 31, 2012		31,477,483			(261,454)
Beginning Balance at Dec. 31, 2012	556,963	315	277,412	227,927	(5,007)	5,007	51,309
Beginning Balance, shares at Dec. 31, 2012		31,496,881			(266,845)
Net Earnings	18,577			18,577
Stock issuances	612		612
stock issuances, shares		23,092
Cash dividends declared	(7,879)			(7,879)
Change in unrealized gain in investment securities available-for-sale, net of related income taxes	(4,119)						(4,119)
Additional tax benefit related to directors' deferred compensation plan	10		10
Shares purchased in connection with directors' deferred compensation plan, net					(131)	131
Shares purchased in connection with directors' deferred compensation plan, net, shares					(1,503)
Stock option expense	88		88
Ending Balance at Mar. 31, 2013	$ 564,252	$ 315	$ 278,122	$ 238,625	$ (5,138)	$ 5,138	$ 47,190
Ending Balance, shares at Mar. 31, 2013		31,519,973			(268,348)

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CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
Statement Of Financial Position [Abstract]
SECURITIES HELD-TO-MATURITY, fair value	$ 920	$ 1,080	$ 2,612
Common stock, par value	$ 0.01	$ 0.01	$ 0.01
Common stock, shares authorized	80,000,000	80,000,000	80,000,000
Common stock, shares issued	31,519,973	31,496,881	31,477,483
Treasury stock, shares	268,348	266,845	261,454

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Recently Issued Authoritative Accounting Guidance

3 Months Ended

Mar. 31, 2013

Accounting Changes And Error Corrections [Abstract]

Recently Issued Authoritative Accounting Guidance

Note 8 – Recently Issued Authoritative Accounting Guidance

In 2011 and 2013, the Financial Accounting Standards Board (the “FASB”) amended its authoritative guidance related to offsetting assets and liabilities to require an entity to disclose both gross and net information about financial instruments, such as sales and repurchase agreements and reverse sales and repurchase agreements and securities borrowing/lending arrangements, and derivative instruments that are eligible for offset in the statement of financial position and/or subject to a master netting arrangement or similar agreement. The new guidance was effective for annual and interim periods beginning on January 1, 2013, and did not have a significant impact on the Company’s financial statements.

In 2013, the FASB amended its authoritative guidance related to reporting of reclassifications out of other comprehensive earnings. The new guidance sets requirements for presentation for significant items reclassified to net earnings during the period presented. The new guidance was effective for annual and interim periods beginning on January 1, 2013 and have been included in these financial statements.

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Document and Entity Information	3 Months Ended
	Mar. 31, 2013	Apr. 26, 2013
Document Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q1
Trading Symbol	FFIN
Entity Registrant Name	FIRST FINANCIAL BANKSHARES INC
Entity Central Index Key	0000036029
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		31,532,851

XML

Fair Value Disclosures

3 Months Ended

Mar. 31, 2013

Fair Value Disclosures [Abstract]

Fair Value Disclosures

Note 9 – Fair Value Disclosures

The authoritative accounting guidance for fair value measurements 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. A fair value measurement assumes that the transaction to sell the asset or transfer the liability occurs in the principal market for the asset or liability or, in the absence of a principal market, the most advantageous market for the asset or liability. The price in the principal (or most advantageous) market used to measure the fair value of the asset or liability shall not be adjusted for transaction costs. An orderly transaction is a transaction that assumes exposure to the market for a period prior to the measurement date to allow for marketing activities that are usual and customary for transactions involving such assets and liabilities; it is not a forced transaction. Market participants are buyers and sellers in the principal market that are (i) independent, (ii) knowledgeable, (iii) able to transact, and (iv) willing to transact.

The authoritative accounting guidance requires the use of valuation techniques that are consistent with the market approach, the income approach and/or the cost approach. The market approach uses prices and other relevant information generated by market transactions involving identical or comparable assets and liabilities. The income approach uses valuation techniques to convert future amounts, such as cash flows or earnings, to a single present amount on a discounted basis. The cost approach is based on the amount that currently would be required to replace the service capacity of an asset (replacement costs). Valuation techniques should be consistently applied. Inputs to valuation techniques refer to the assumptions that market participants would use in pricing the asset or liability. Inputs may be observable, meaning those that reflect the assumptions market participants would use in pricing the asset or liability developed based on market data obtained from independent sources, or unobservable, meaning those that reflect the reporting entity’s own assumptions about the assumptions market participants would use in pricing the asset or liability developed based on the best information available in the circumstances. In that regard, the authoritative guidance establishes a fair value hierarchy for valuation inputs that gives the highest priority to quoted prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs. The fair value hierarchy is as follows:

• Level 1 Inputs – Unadjusted quoted prices in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date.

• Level 2 Inputs – Inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. These include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (for example, interest rates, volatilities, prepayment speeds, loss severities, credit risks and default rates) or inputs that are derived principally from or corroborated by observable market data by correlation or other means.

• Level 3 Inputs – Significant unobservable inputs that reflect an entity’s own assumptions that market participants would use in pricing the assets or liabilities.

A description of the valuation methodologies used for assets and liabilities measured at fair value, as well as the general classification of such instruments pursuant to the valuation hierarchy, is set forth below.

In general, fair value is based upon quoted market prices, where available. If such quoted market prices are not available, fair value is based upon internally developed models that primarily use, as inputs, observable market-based parameters. Valuation adjustments may be made to ensure that financial instruments are recorded at fair value. While management believes the Company’s valuation methodologies are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different estimate of fair value at the reporting date.

Securities classified as available-for-sale and trading are reported at fair value utilizing Level 1 and Level 2 inputs. For these securities, the Company obtains fair value measurements from an independent pricing service. The fair value measurements consider observable data that may include market spreads, cash flows, the United States Treasury yield curve, live trading levels, trade execution data, dealer quotes, market consensus prepayments speeds, credit information and the security’s terms and conditions, among other items. Securities are considered to be measured with Level 1 inputs at the time of purchase and for 30 days following. After 30 days, the majority of securities are transferred to Level 2 as they are considered to be measured with Level 2 inputs, with the exception of U. S. Treasury securities and any other security for which there remain Level 1 inputs. Transfers are recognized on the actual date of transfer.

There were no transfers between Level 2 and Level 3 during the three months ended March 31, 2013 or 2012.

The following table summarizes financial assets and financial liabilities measured at fair value on a recurring basis as of March 31, 2013, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value (dollars in thousands):

	Level 1 Inputs		Level 2 Inputs		Level 3 Inputs		Total Fair Value
Available-for-sale investment securities:
U. S. Treasury securities	$	6,039	$	—	$	—	$	6,039
Obligations of U. S. government sponsored-enterprises and agencies		16,844		176,520		—		193,364
Obligations of states and political subdivisions		86,393		831,522		—		917,915
Corporate bonds		—		113,067		—		113,067
Residential mortgage-backed securities		37,972		578,594		—		616,566
Commercial mortgage-backed securities		10,556		96,489		—		107,045
Other securities		4,155		—		—		4,155
Total	$	161,959	$	1,796,192	$	—	$	1,958,151

Certain financial assets and financial liabilities are measured at fair value on a nonrecurring basis, that is, 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). Financial assets and financial liabilities measured at fair value on a non-recurring basis include the following at March 31, 2013:

Impaired Loans – Impaired loans are reported at the fair value of the underlying collateral if repayment is expected solely from the collateral. Collateral values are estimated using Level 2 inputs based on observable market data, or Level 3 input based on the discounting of the collateral. At March 31, 2013, impaired loans with a carrying value of $22,509,000 were reduced by specific valuation reserves totaling $5,793,000 resulting in a net fair value of $16,716,000.

Loans Held for Sale – Loans held for sale are reported at the lower of cost or fair value. In determining whether the fair value of loans held for sale is less than cost when quoted market prices are not available, the Company considers investor commitments/contracts. These loans are considered Level 2 of the fair value hierarchy. At March 31, 2013, the Company’s mortgage loans held for sale were recorded at cost as fair value exceeded cost.

Certain non-financial assets and non-financial liabilities measured at fair value on a non-recurring basis include other real estate owned, goodwill and other intangible assets and other non-financial long-lived assets. Non-financial assets measured at fair value on a non-recurring basis during the three months ended March 31, 2013 and 2012 include other real estate owned which, subsequent to their initial transfer to other real estate owned from loans, were re-measured at fair value through a write-down included in gain (loss) on sale of foreclosed assets. During the reported periods, all fair value measurements for foreclosed assets utilized Level 2 inputs based on observable market data, generally third-party appraisals, or Level 3 inputs based on customized discounting criteria. These appraisals are evaluated individually and discounted are as necessary due to the age of the appraisal, lack of comparable sales, expected holding periods of property or special use type of the property. Such discounts vary by appraisal based on

the above factors but generally range from 5% to 25% of the appraised value. Reevaluation of other real estate owned is performed at least annually as required by regulatory guidelines or more often if particular circumstances arise. The following table presents other real estate owned that were re-measured subsequent to their initial transfer to other real estate owned (dollars in thousands):

	Three months ended March 31,
	2013			2012
Carrying value of other real estate owned prior to re-measurement	$	1,827		$	417
Write-downs included in gain (loss) on sale of other real estate owned		(304	)		(101	)
Fair value	$	1,523		$	316

At March 31, 2013 and 2012, and December 31, 2012, other real estate owned totaled $3,052,000, $7,815,000 and $3,505,000, respectively.

The Company is required under current authoritative accounting guidance to disclose the estimated fair value of their financial instrument assets and liabilities including those subject to the requirements discussed above. For the Company, as for most financial institutions, substantially all of its assets and liabilities are considered financial instruments, as defined. Many of the Company’s financial instruments, however, lack an available trading market as characterized by a willing buyer and willing seller engaging in an exchange transaction.

The estimated fair value amounts of financial instruments have been determined by the Company using available market information and appropriate valuation methodologies. However, considerable judgment is required to interpret data to develop the estimates of fair value. Accordingly, the estimates presented herein are not necessarily indicative of the amounts the Company could realize in a current market exchange. The use of different market assumptions and/or estimation methodologies may have a material effect on the estimated fair value amounts.

In addition, reasonable comparability between financial institutions may not be likely due to the wide range of permitted valuation techniques and numerous estimates that must be made given the absence of active secondary markets for many of the financial instruments. This lack of uniform valuation methodologies also introduces a greater degree of subjectivity to these estimated fair values.

Cash and due from banks, federal funds sold, interest-bearing deposits and time deposits in banks and accrued interest receivable and payable are liquid in nature and considered Level 1 or 2 of the fair value hierarchy.

Financial instruments with stated maturities have been valued using a present value discounted cash flow with a discount rate approximating current market for similar assets and liabilities and are considered Levels 2 and 3 of the fair value hierarchy. Financial instrument liabilities with no stated maturities have an estimated fair value equal to both the amount payable on demand and the carrying value and are considered Level 1 of the fair value hierarchy.

The carrying value and the estimated fair value of the Company’s contractual off-balance-sheet unfunded lines of credit, loan commitments and letters of credit, which are generally priced at market at the time of funding, are not material.

The estimated fair values and carrying values of all financial instruments under current authoritative guidance at March 31, 2013 and December 31, 2012, were as follows (in thousands):

	March 31,				December 31,
	2013				2012
	Carrying		Estimated		Carrying		Estimated		Fair Value
	Value		Fair Value		Value		Fair Value		Hierarchy
Cash and due from banks	$	113,958	$	113,958	$	207,018	$	207,018	Level 1
Federal funds sold		3,175		3,175		14,045		14,045	Level 1
Interest-bearing deposits in banks		20,065		20,065		139,676		139,676	Level 1
Interest-bearing time deposits in banks		45,172		45,415		49,005		49,288	Level 2
Available-for-sale securities		1,958,151		1,958,151		1,819,035		1,819,035	Levels 1 and 2
Held-to-maturity securities		903		920		1,061		1,080	Level 2
Loans		2,103,465		2,120,669		2,053,784		2,081,091	Level 3
Accrued interest receivable		20,904		20,904		23,122		23,122	Level 2
Deposits with stated maturities		620,848		621,946		637,040		638,227	Level 2
Deposits with no stated maturities		2,929,278		2,929,278		2,995,544		2,995,544	Level 1
Short term borrowings		263,345		263,345		259,697		259,697	Level 2
Accrued interest payable		239		239		287		287	Level 2

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CONSOLIDATED STATEMENTS OF EARNINGS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
INTEREST INCOME:
Interest and fees on loans	$ 26,445	$ 24,640
Interest on investment securities:
Taxable	6,375	8,804
Exempt from federal income tax	6,579	6,141
Interest on federal funds sold and interest-bearing deposits in banks	176	212
Total interest income	39,575	39,797
INTEREST EXPENSE:
Interest on deposits	867	1,482
Other	37	58
Total interest expense	904	1,540
Net interest income	38,671	38,257
PROVISION FOR LOAN LOSSES	401	1,296
Net interest income after provision for loan losses	38,270	36,961
NONINTEREST INCOME:
Trust fees	3,793	3,454
Service charges on deposit accounts	3,895	3,882
ATM, interchange and credit card fees	3,729	3,676
Real estate mortgage operations	1,384	1,050
Net gain on available-for-sale securities (includes $222 and $346 for the three months ended March 31, 2013 and 2012, respectively, related to accumulated other comprehensive earnings reclassifications)	222	346
Net gain (loss) on sale of foreclosed assets	(316)	6
Other	1,253	884
Total noninterest income	13,960	13,298
NONINTEREST EXPENSE:
Salaries and employee benefits	15,180	14,229
Net occupancy expense	1,766	1,737
Equipment expense	2,281	2,108
FDIC insurance premiums	572	527
ATM, interchange and credit card expenses	1,340	1,249
Professional and service fees	803	737
Printing, stationery and supplies	472	505
Amortization of intangible assets	10	44
Other	5,047	5,332
Total noninterest expense	27,471	26,468
EARNINGS BEFORE INCOME TAXES	24,759	23,791
INCOME TAX EXPENSE (includes $78 and $121 for the three months ended March 31, 2013 and 2012, respectively, related to income tax expense from reclassification items)	6,182	6,035
NET EARNINGS	$ 18,577	$ 17,756
EARNINGS PER SHARE, BASIC	$ 0.59	$ 0.56
EARNINGS PER SHARE, ASSUMING DILUTION	$ 0.59	$ 0.56
DIVIDENDS PER SHARE	$ 0.25	$ 0.24

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Interest-bearing Time Deposits in Banks and Securities

3 Months Ended

Mar. 31, 2013

Investments Debt And Equity Securities [Abstract]

Interest-bearing Time Deposits in Banks and Securities

Note 3 – Interest-bearing Time Deposits in Banks and Securities

Interest-bearing time deposits in banks totaled $45,172,000 and $49,005,000 at March 31, 2013 and December 31, 2012, respectively, and have original maturities generally ranging from one to two years. Of these amounts, $40,943,000 and $44,776,000 are time deposits with balances greater than $100,000 at March 31, 2013 and December 31, 2012, respectively.

The Company records its available-for-sale and trading securities portfolio at fair value.

Management classifies debt and equity securities as held-to-maturity, available-for-sale, or trading based on its intent. Debt securities that management has the positive intent and ability to hold to maturity are classified as held-to-maturity and recorded at cost, adjusted for amortization of premiums and accretion of discounts, which are recognized as adjustments to interest income using the interest method. Securities not classified as held-to-maturity or trading are classified as available-for-sale and recorded at estimated fair value, with all unrealized gains and unrealized losses judged to be temporary, net of deferred income taxes, excluded from earnings and reported in the consolidated statements of comprehensive earnings. Available-for-sale securities that have unrealized losses that are judged other than temporary are included in gain (loss) on sale of securities and a new cost basis is established. Securities classified as trading are recorded at estimated fair value with unrealized gains and losses included in earnings.

Fair values of these securities are determined based on methodologies in accordance with current authoritative accounting guidance. Fair values are volatile and may be influenced by a number of factors, including market interest rates, prepayment speeds, discount rates, credit ratings and yield curves. Fair values for investment securities are based on quoted market prices, where available. If quoted market prices are not available, fair values are based on the quoted prices of similar instruments or an estimate of fair value by using a range of fair value estimates in the market place as a result of the illiquid market specific to the type of security.

When the fair value of a security is below its amortized cost, and depending on the length of time the condition exists and the extent the fair value is below amortized cost, additional analysis is performed to determine whether an other-than-temporary impairment condition exists. Available-for-sale and held-to-maturity securities are analyzed quarterly for possible other-than-temporary impairment. The analysis considers (i) whether we have the intent to sell our securities prior to recovery and/or maturity, (ii) whether it is more likely than not that we will have to sell our securities prior to recovery and/or maturity, (iii) the length of time and extent to which the fair value has been less than costs, and (iv) the financial condition of the issuer. Often, the information available to conduct these assessments is limited and rapidly changing, making estimates of fair value subject to judgment. If actual information or conditions are different than estimated, the extent of the impairment of the security may be different than previously estimated, which could have a material effect on the Company’s results of operations and financial condition.

The Company’s investment portfolio consists of traditional investments, substantially all in U.S. Treasury securities, obligations of U.S. government sponsored-enterprises and agencies, mortgage pass-through securities, corporate bonds and general obligation or revenue based municipal bonds. Pricing for such securities is generally readily available and transparent in the market. The Company utilizes independent third party pricing services to assist in valuing its investment securities. The Company reviews the prices supplied by the independent pricing services as well as the underlying pricing methodologies for reasonableness and to ensure such prices are aligned with traditional pricing matrices. The Company validates quarterly, on a sample basis, prices supplied by the independent pricing services by comparison to prices obtained from other third party sources.

A summary of available-for-sale and held-to-maturity securities follows (in thousands):

	March 31, 2013
	Amortized Cost Basis		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses			Estimated Fair Value
Securities available-for-sale:
U.S. Treasury securities	$	6,017	$	23	$	—		$	6,040
Obligations of U.S. government sponsored-enterprises and agencies		189,913		3,451		—			193,364
Obligations of states and political subdivisions		865,282		53,191		(558	)		917,915
Corporate bonds and other		111,669		5,553		—			117,222
Residential mortgage-backed securities		592,911		23,866		(213	)		616,564
Commercial mortgage-backed securities		106,898		1,408		(1,260	)		107,046
Total securities available-for-sale	$	1,872,690	$	87,492	$	(2,031	)	$	1,958,151
Securities held-to-maturity:
Obligations of states and political subdivisions	$	595	$	5	$	—		$	600
Residential mortgage-backed securities		308		12		—			320
Total debt securities held-to-maturity	$	903	$	17	$	—		$	920

	December 31, 2012
	Amortized Cost Basis		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses			Estimated Fair Value
Securities available-for-sale:
U.S. Treasury securities	$	6,042	$	48	$	—		$	6,090
Obligations of U.S. government sponsored-enterprises and agencies		219,420		4,060		—			223,480
Obligations of states and political subdivisions		786,278		57,541		(129	)		843,690
Corporate bonds and other		117,244		6,020		(73	)		123,191
Residential mortgage-backed securities		564,434		23,285		(443	)		587,276
Commercial mortgage-backed securities		33,819		1,739		(250	)		35,308
Total securities available-for-sale	$	1,727,237	$	92,693	$	(895	)	$	1,819,035
Securities held-to-maturity:
Obligations of states and political subdivisions	$	735	$	7	$	—		$	742
Residential mortgage-backed securities		294		11		—			305
Commercial mortgage-backed securities		32		1		—			33
Total debt securities held-to-maturity	$	1,061	$	19	$	—		$	1,080

The Company invests in mortgage-backed securities that have expected maturities that differ from their contractual maturities. These differences arise because borrowers may have the right to call or prepay obligations with or without a prepayment penalty. These securities include collateralized mortgage obligations (CMOs) and other asset backed securities. The expected maturities of these securities at March 31, 2013, were computed by using scheduled amortization of balances and historical prepayment rates. At March 31, 2013 and December 31, 2012, the Company did not hold any CMOs that entail higher risks than standard mortgage-backed securities.

The amortized cost and estimated fair value of debt securities at March 31, 2013, by contractual and expected maturity, are shown below (in thousands):

	Available-for-Sale				Held-to-Maturity
	Amortized Cost Basis		Estimated Fair Value		Amortized Cost Basis		Estimated Fair Value
Due within one year	$	142,205	$	144,366	$	595	$	600
Due after one year through five years		509,641		532,461		—		—
Due after five years through ten years		495,789		530,064		—		—
Due after ten years		25,246		27,650		—		—
Mortgage-backed securities		699,809		723,610		308		320
Total	$	1,872,690	$	1,958,151	$	903	$	920

The following tables disclose, as of March 31, 2013 and December 31, 2012, the Company’s investment securities that have been in a continuous unrealized-loss position for less than 12 months and for 12 months or longer (in thousands):

	Less than 12 Months				12 Months or Longer				Total
March 31, 2013	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Obligations of states and political subdivisions	$	42,102	$	558	$	—	$	—	$	42,102	$	558
Residential mortgage-backed securities		8,664		9		14,885		204		23,549		213
Commercial mortgage-backed securities		38,472		1,260		—		—		38,472		1,260
Total	$	89,238	$	1,827	$	14,885	$	204	$	104,123	$	2,031
	Less than 12 Months				12 Months or Longer				Total
December 31, 2012	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Obligations of states and political subdivisions	$	36,480	$	129	$	—	$	—	$	36,480	$	129
Residential mortgage-backed securities		17,344		401		3,574		42		20,918		443
Commercial mortgage-backed securities		12,453		250		—		—		12,453		250
Corporate bonds and other		4,994		73		—		—		4,994		73
Total	$	71,271	$	853	$	3,574	$	42	$	74,845	$	895

The number of investment positions in an unrealized loss position totaled 108 at March 31, 2013. We do not believe these unrealized losses are “other than temporary” as (i) we do not have the intent to sell our securities prior to recovery and/or maturity and (ii) it is more likely than not that we will not have to sell our securities prior to recovery and/or maturity. In making the determination, we also consider the length of time and extent to which fair value has been less than cost and the financial condition of the issuer. The unrealized losses noted are interest rate related due to the level of interest rates at March 31, 2013 compared to the time of purchase. We have reviewed the ratings of the issuers and have not identified any issues related to the ultimate repayment of principal as a result of credit concerns on these securities. Our mortgage related securities are backed by GNMA, FNMA and FHLMC or are collateralized by securities backed by these agencies.

Securities, carried at approximately $870,328,000 at March 31, 2013, were pledged as collateral for public or trust fund deposits, repurchase agreements and for other purposes required or permitted by law.

During the quarter ended March 31, 2013 and 2012, sales of investment securities that were classified as available-for-sale totaled $5,227,000 and $21,003,000, respectively. Gross realized gains from securities sales and calls during the first quarter of 2013 and 2012 totaled $223,000 and $346,000, respectively. Gross realized losses from securities sales and calls during the first quarter of 2013 totaled $1,000. There were no losses realized on securities sales and calls during the first quarter of 2012. The specific identification method was used to determine cost in order to compute the realized gains and losses.

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Earnings Per Share

3 Months Ended

Mar. 31, 2013

Earnings Per Share [Abstract]

Earnings Per Share

Note 2—Earnings Per Share

Basic earnings per common share is computed by dividing net income available to common shareholders by the weighted average number of shares outstanding during the periods presented. In computing diluted earnings per common share for the three months ended March 31, 2013 and 2012, the Company assumes that all dilutive outstanding options to purchase common stock have been exercised at the beginning of the period (or the time of issuance, if later). The dilutive effect of the outstanding options is reflected by application of the treasury stock method, whereby the proceeds from the exercised options are assumed to be used to purchase common stock at the average market price during the respective periods. The weighted average common shares outstanding used in computing basic earnings per common share for the three months ended March 31, 2013 and 2012, were 31,507,975 and 31,466,706 shares, respectively. The weighted average common shares outstanding used in computing fully diluted earnings per common share for the three months ended March 31, 2013 and 2012, were 31,601,364 and 31,479,743 respectively.

XML

Basis of Presentation - Additional Information (Detail)	Mar. 31, 2013	Dec. 31, 2012	Dec. 30, 2012	Apr. 24, 2012	Mar. 31, 2012	Oct. 26, 2011
Basis Of Presentation [Line Items]
Number of financial centers	56
Consolidation of bank charters description			Eleven bank charters into one charter
Stock repurchase program, number of shares authorized to be repurchased						750,000
Common stock, shares authorized	80,000,000	80,000,000		80,000,000	80,000,000
Subsidiary of Common Parent [Member]
Basis Of Presentation [Line Items]
Number of financial centers	6
Abilene [Member]
Basis Of Presentation [Line Items]
Number of financial centers	11
Abilene [Member] | Subsidiary of Common Parent [Member]
Basis Of Presentation [Line Items]
Number of financial centers	1
Cleburne [Member]
Basis Of Presentation [Line Items]
Number of financial centers	2
Stephenville [Member]
Basis Of Presentation [Line Items]
Number of financial centers	2
Stephenville [Member] | Subsidiary of Common Parent [Member]
Basis Of Presentation [Line Items]
Number of financial centers	1
Granbury [Member]
Basis Of Presentation [Line Items]
Number of financial centers	2
San Angelo [Member]
Basis Of Presentation [Line Items]
Number of financial centers	3
San Angelo [Member] | Subsidiary of Common Parent [Member]
Basis Of Presentation [Line Items]
Number of financial centers	1
Weatherford [Member]
Basis Of Presentation [Line Items]
Number of financial centers	3
Mineral Wells [Member]
Basis Of Presentation [Line Items]
Number of financial centers	1
Hereford [Member]
Basis Of Presentation [Line Items]
Number of financial centers	1
Sweetwater [Member]
Basis Of Presentation [Line Items]
Number of financial centers	1
Sweetwater [Member] | Subsidiary of Common Parent [Member]
Basis Of Presentation [Line Items]
Number of financial centers	1
Eastland [Member]
Basis Of Presentation [Line Items]
Number of financial centers	1
Ranger [Member]
Basis Of Presentation [Line Items]
Number of financial centers	1
Rising Star [Member]
Basis Of Presentation [Line Items]
Number of financial centers	1
Cisco [Member]
Basis Of Presentation [Line Items]
Number of financial centers	1
Southlake [Member]
Basis Of Presentation [Line Items]
Number of financial centers	1
Grapevine [Member]
Basis Of Presentation [Line Items]
Number of financial centers	1
Aledo [Member]
Basis Of Presentation [Line Items]
Number of financial centers	1
Willow Park [Member]
Basis Of Presentation [Line Items]
Number of financial centers	1
Brock [Member]
Basis Of Presentation [Line Items]
Number of financial centers	1
Alvarado [Member]
Basis Of Presentation [Line Items]
Number of financial centers	1
Burleson [Member]
Basis Of Presentation [Line Items]
Number of financial centers	1
Keller [Member]
Basis Of Presentation [Line Items]
Number of financial centers	1
Trophy Club [Member]
Basis Of Presentation [Line Items]
Number of financial centers	1
Boyd [Member]
Basis Of Presentation [Line Items]
Number of financial centers	1
Bridgeport [Member]
Basis Of Presentation [Line Items]
Number of financial centers	1
Decatur [Member]
Basis Of Presentation [Line Items]
Number of financial centers	1
Roby [Member]
Basis Of Presentation [Line Items]
Number of financial centers	1
Trent [Member]
Basis Of Presentation [Line Items]
Number of financial centers	1
Merkel [Member]
Basis Of Presentation [Line Items]
Number of financial centers	1
Clyde [Member]
Basis Of Presentation [Line Items]
Number of financial centers	1
Moran [Member]
Basis Of Presentation [Line Items]
Number of financial centers	1
Albany [Member]
Basis Of Presentation [Line Items]
Number of financial centers	1
Midlothian [Member]
Basis Of Presentation [Line Items]
Number of financial centers	1
Crowley [Member]
Basis Of Presentation [Line Items]
Number of financial centers	1
Glen Rose [Member]
Basis Of Presentation [Line Items]
Number of financial centers	1
Odessa [Member]
Basis Of Presentation [Line Items]
Number of financial centers	1
Odessa [Member] | Subsidiary of Common Parent [Member]
Basis Of Presentation [Line Items]
Number of financial centers	1
Waxahachie [Member]
Basis Of Presentation [Line Items]
Number of financial centers	1
Acton [Member]
Basis Of Presentation [Line Items]
Number of financial centers	1
Fort Worth [Member]
Basis Of Presentation [Line Items]
Number of financial centers	1
Fort Worth [Member] | Subsidiary of Common Parent [Member]
Basis Of Presentation [Line Items]
Number of financial centers	1
Huntsville [Member]
Basis Of Presentation [Line Items]
Number of financial centers	1

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Acquisition Definitive Agreement Signed

3 Months Ended

Mar. 31, 2013

Equity [Abstract]

Acquisition Definitive Agreement Signed

Note 10 – Acquisition Definitive Agreement Signed

On February 20, 2013, the Company announced that it has entered into a definitive agreement to acquire Orange Savings Bank, SSB in Orange, Texas for an expected combination of cash and stock purchase price of approximately $56.0 million. Pending regulatory and shareholder approval, the acquisition is expected to be finalized in the second quarter of 2013.

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Stock Based Compensation

3 Months Ended

Mar. 31, 2013

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock Based Compensation

Note 6 – Stock Based Compensation

The Company grants incentive stock options for a fixed number of shares with an exercise price equal to the fair value of the shares at the date of grant to employees. No options have been granted in 2013 or 2012. The Company recorded stock option expense totaling approximately $88,000 thousand and $88,000, respectively, for the three-month periods ended March 31, 2013 and 2012. The additional disclosure requirements under authoritative accounting guidance have been omitted due to immateriality.

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Loans and Allowance for Loan Losses

3 Months Ended

Mar. 31, 2013

Receivables [Abstract]

Loans and Allowance for Loan Losses

Note 4 –Loans and Allowance for Loan Losses

Loans held for investment are stated at the amount of unpaid principal, reduced by unearned income and an allowance for loan losses. Interest on loans is calculated by using the simple interest method on daily balances of the principal amounts outstanding. The Company defers and amortizes net loan origination fees and costs as an adjustment to yield. The allowance for loan losses is established through a provision for loan losses charged to expense. Loans are charged against the allowance for loan losses when management believes the collectability of the principal is unlikely.

The Company has certain lending policies and procedures in place that are designed to maximize loan income with an acceptable level of risk. Management reviews and approves these policies and procedures on a regular basis and makes changes as appropriate. Management receives and reviews frequent reports related to loan originations, quality, concentrations, delinquencies, non-performing and potential problem loans. Diversification in the loan portfolio is a means of managing risk associated with fluctuations in economic conditions, both by type of loan and geographic location.

Commercial loans are underwritten after evaluating and understanding the borrower’s ability to operate profitably and effectively. Underwriting standards are designed to determine whether the borrower possesses sound business ethics and practices and to evaluate current and projected cash flows to determine the ability of the borrower to repay their obligations as agreed. Commercial loans are primarily made based on the identified cash flows of the borrower and, secondarily, on the underlying collateral provided by the borrower. Most commercial loans are secured by the assets being financed or other business assets, such as accounts receivable or inventory and include personal guarantees.

Agricultural loans are subject to underwriting standards and processes similar to commercial loans. These agricultural loans are based primarily on the identified cash flows of the borrower and secondarily on the underlying collateral provided by the borrower. Most agricultural loans are secured by the agriculture related assets being financed, such as farm land, cattle or equipment and include personal guarantees.

Real estate loans are also subject to underwriting standards and processes similar to commercial and agricultural loans. These loans are underwritten primarily based on projected cash flows and, secondarily, as loans secured by real estate. The repayment of real estate loans is generally largely dependent on the successful operation of the property securing the loans or the business conducted on the property securing the loan. Real estate loans may be more adversely affected by conditions in the real estate markets or in the general economy. The properties securing the Company’s real estate portfolio are generally diverse in terms of type and geographic location. This diversity helps reduce the exposure to adverse economic events that affect any single market or industry. Generally, real estate loans are owner occupied which further reduces the Company’s risk.

Consumer loan underwriting utilizes methodical credit standards and analysis to supplement the Company’s underwriting policies and procedures. The Company’s loan policy addresses types of consumer loans that may be originated and the collateral, if secured, which must be perfected. The relatively smaller individual dollar amounts of consumer loans that are spread over numerous individual borrowers also minimize the Company’s risk.

The allowance is an amount management believes is appropriate to absorb probable losses that have been incurred on existing loans as of the balance sheet date based upon management’s review and evaluation of the loan portfolio. The allowance for loan losses is comprised of three elements: (i) specific reserves determined in accordance with current authoritative accounting guidance based on probable losses on specific classified loans; (ii) general reserve determined in accordance with current authoritative accounting guidance that considers historical loss rates; and (iii) qualitative reserves determined in accordance with current authoritative accounting guidance based upon general economic conditions and other qualitative risk factors both internal and external to the Company. The allowance for loan losses is increased by charges to income and decreased by charge-offs (net of recoveries). Management’s periodic evaluation of the appropriateness of the allowance is based on general economic conditions, the financial condition of borrowers, the value and liquidity of collateral, delinquency, prior loan loss experience, and the results of periodic reviews of the portfolio. For purposes of determining our general reserve, the loan portfolio, less cash secured loans, government guaranteed loans and classified loans, is multiplied by the Company’s historical loss rate. Our methodology is constructed so that specific allocations are increased in accordance with deterioration in credit quality and a corresponding increase in risk of loss on a particular loan. In addition, we adjust our allowance for qualitative factors such as current local economic conditions and trends, including, without limitations, unemployment, changes in lending staff, policies and procedures, changes in credit concentrations, changes in the trends and severity of problem loans and changes in trends in volume and terms of loans. This additional allocation based on qualitative factors serves to compensate for additional areas of uncertainty inherent in our portfolio that are not reflected in our historic loss factors.

Although we believe we use the best information available to make loan loss allowance determinations, future adjustments could be necessary if circumstances or economic conditions differ substantially from the assumptions used in making our initial determinations. A further downturn in the economy and employment could result in increased levels of non-performing assets and charge-offs, increased loan provisions and reductions in income. Additionally, bank regulatory agencies periodically review our allowance for loan losses and could require additions to the loan loss allowance based on their judgment of information available to them at the time of their examination.

Accrual of interest is discontinued on a loan and payments are applied to principal when management believes, after considering economic and business conditions and collection efforts, the borrower’s financial condition is such that collection of interest is doubtful. Except consumer loans, generally all loans past due greater than 90 days, based on contractual terms, are placed on non-accrual. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured. Consumer loans are generally charged-off when a loan becomes past due 90 days. For other loans in the portfolio, facts and circumstances are evaluated in making charge-off decisions.

Loans are considered impaired when, based on current information and events, management determines that it is probable we will be unable to collect all amounts due in accordance with the original contractual terms of the loan agreement, including scheduled principal and interest payments. If a loan is impaired, a specific valuation allowance is allocated, if necessary. Interest payments on impaired loans are typically applied to principal unless collectability of the principal amount is reasonably assured, in which case interest is recognized on a cash basis. Impaired loans, or portions thereof, are charged off when deemed uncollectable.

The Company’s policy requires measurement of the allowance for an impaired, collateral dependent loan based on the fair value of the collateral. Other loan impairments are measured based on the present value of expected future cash flows or the loan’s observable market price. At March 31, 2013 and 2012, and December 31, 2012, all significant impaired loans have been determined to be collateral dependent and the allowance for loss has been measured utilizing the estimated fair value of the collateral.

From time to time, the Company modifies its loan agreement with a borrower. A modified loan is considered a troubled debt restructuring when two conditions are met: (i) the borrower is experiencing financial difficulty and (ii) concessions are made by the Company that would not otherwise be considered for a borrower with similar credit risk characteristics. Modifications to loan terms may include a lower interest rate, a reduction of principal, or a longer term to maturity. To date, these troubled debt restructurings have been such that, after considering economic and business conditions and collection efforts, the collection of interest is doubtful and therefore the loan has been placed on non-accrual. Each of these loans is evaluated for impairment and a specific reserve is recorded based on probable losses, taking into consideration the related collateral and modified loan terms and cash flow. As of March 31, 2013 and 2012, and December 31, 2012, all of the Company’s troubled debt restructured loans are included in the non-accrual totals.

The Company originates certain mortgage loans for sale in the secondary market. Accordingly, these loans are classified as held for sale and are carried at the lower of cost or fair value on an aggregate basis. Loans held for sale totaled $10,122,000, $5,695,000 and $11,457,000, at March 31, 2013 and 2012 and December 31, 2012, respectively, in which the carrying amounts approximate fair value. The mortgage loan sales contracts contain indemnification clauses should the loans default, generally in the first three to six months, or if documentation is determined not to be in compliance with regulations. The Company’s historic losses as a result of these indemnities have been insignificant.

Major classifications of loans held for investment are as follows (in thousands):

	March 31,				December 31, 2012
	2013		2012
Commercial	$	513,422	$	433,351	$	509,609
Agricultural		55,247		57,977		68,306
Real estate		1,275,564		1,083,244		1,226,823
Consumer		283,782		218,600		272,428
Total loans held for investment	$	2,128,015	$	1,793,172	$	2,077,166

The Company’s non-accrual loans, loans still accruing and past due 90 days or more and restructured loans are as follows (in thousands):

	March 31,				December 31, 2012
	2013		2012
Non-accrual loans	$	22,509	$	20,963	$	21,800
Loans still accruing and past due 90 days or more		24		53		97
Restructured loans*		—		—		—
Total	$	22,533	$	21,016	$	21,897

* Restructured loans whose interest collection, after considering economic and business conditions and collection efforts, is doubtful are included in non-accrual loans.

The Company’s recorded investment in impaired loans and the related valuation allowance are as follows (in thousands):

March 31, 2013		March 31, 2012		December 31, 2012
Recorded Investment	Valuation Allowance	Recorded Investment	Valuation Allowance	Recorded Investment	Valuation Allowance
$ 22,509	$5,793	$20,963	$5,357	$21,800	$6,010

The average recorded investment in impaired loans for the three months ended March 31, 2013 and 2012 and the year ended December 31, 2012 was approximately $23,163,000, $21,957,000 and $24,025,000, respectively. The Company had $25,718,000, $28,868,000 and $25,462,000 in non-accrual, past due 90 days still accruing and restructured loans and foreclosed assets at March 31, 2013 and 2012, and December 31, 2012, respectively. Non-accrual loans totaled $22,509,000, $20,963,000 and $21,800,000, respectively, and consisted of the following amounts by type (in thousands):

	March 31,				December 31, 2012
	2013		2012
Commercial	$	1,133	$	3,665	$	2,251
Agricultural		473		923		372
Real estate		20,502		16,026		18,698
Consumer		401		349		479
Total	$	22,509	$	20,963	$	21,800

No additional funds are committed to be advanced in connection with impaired loans.

The Company’s impaired loans and related allowance as of March 31, 2013 and 2012, and December 31, 2012, are summarized in the following table (in thousands). No interest income was recognized on impaired loans subsequent to their classification as impaired.

March 31, 2013	Unpaid Contractual Principal Balance		Recorded Investment With No Allowance		Recorded Investment With Allowance		Total Recorded Investment		Related Allowance		Three-month Average Recorded Investment
Commercial	$	1,555	$	25	$	1,108	$	1,133	$	555	$	1,232
Agricultural		489		25		448		473		169		483
Real Estate		24,937		1,956		18,546		20,502		4,901		21,028
Consumer		466		77		324		401		168		420
Total	$	27,447	$	2,083	$	20,426	$	22,509	$	5,793	$	23,163

March 31, 2012	Unpaid Contractual Principal Balance		Recorded Investment With No Allowance		Recorded Investment With Allowance		Total Recorded Investment		Related Allowance		Three-month Average Recorded Investment
Commercial	$	4,218	$	24	$	3,641	$	3,665	$	1,990	$	3,817
Agricultural		948		—		923		923		170		922
Real Estate		20,058		3,470		12,556		16,026		3,082		16,838
Consumer		414		55		294		349		115		380
Total	$	25,638	$	3,549	$	17,414	$	20,963	$	5,357	$	21,957

December 31, 2012	Unpaid Contractual Principal Balance		Recorded Investment With No Allowance		Recorded Investment With Allowance		Total Recorded Investment		Related Allowance		Year-to-Date Average Recorded Investment
Commercial	$	2,677	$	20	$	2,231	$	2,251	$	1,350	$	2,966
Agricultural		381		—		372		372		131		437
Real Estate		22,569		2,049		16,649		18,698		4,356		20,164
Consumer		543		115		364		479		173		458
Total	$	26,170	$	2,184	$	19,616	$	21,800	$	6,010	$	24,025

The Company recognized interest income on impaired loans prior to being recognized as impaired of approximately $384,000 during the year ended December 31, 2012. Such amounts for the three-month period ended March 31, 2013 and 2012 were not significant.

From a credit risk standpoint, the Company classifies its loans in one of four categories: (i) pass, (ii) special mention, (iii) substandard, or (iv) doubtful. Loans classified as loss are charged-off.

The classifications of loans reflect a judgment about the risks of default and loss associated with the loan. The Company reviews the ratings on our credits as part of our on-going monitoring of the credit quality of our loan portfolio. Ratings are adjusted to reflect the degree of risk and loss that are felt to be inherent in each credit as of each monthly reporting period. Our methodology is structured so that specific allocations are increased in accordance with deterioration in credit quality (and a corresponding increase in risk and loss) or decreased in accordance with improvement in credit quality (and a corresponding decrease in risk and loss).

Credits rated special mention show clear signs of financial weaknesses or deterioration in credit worthiness, however, such concerns are not so pronounced that the Company generally expects to experience significant loss within the short-term. Such credits typically maintain the ability to perform within standard credit terms and credit exposure is not as prominent as credits rated more harshly.

Credits rated substandard are those in which the normal repayment of principal and interest may be, or has been, jeopardized by reason of adverse trends or developments of a financial, managerial, economic or political nature, or important weaknesses exist in collateral. A protracted workout on these credits is a distinct possibility. Prompt corrective action is therefore required to strengthen the Company’s position, and/or to reduce exposure and to assure that adequate remedial measures are taken by the borrower. Credit exposure becomes more likely in such credits and a serious evaluation of the secondary support to the credit is performed.

Credits rated doubtful are those in which full collection of principal appears highly questionable, and which some degree of loss is anticipated, even though the ultimate amount of loss may not yet be certain and/or other factors exist which could affect collection of debt. Based upon available information, positive action by the Company is required to avert or minimize loss. Credits rated doubtful are generally also placed on non-accrual.

At March 31, 2013 and December 31, 2012, the following summarizes the Company’s internal ratings of its loans held for investment (in thousands):

March 31, 2013	Pass		Special Mention		Substandard		Doubtful		Total
Commercial	$	501,859	$	2,083	$	9,449	$	31	$	513,422
Agricultural		51,321		337		3,582		7		55,247
Real Estate		1,222,112		15,015		38,281		156		1,275,564
Consumer		282,545		349		870		18		283,782
Total	$	2,057,837	$	17,784	$	52,182	$	212	$	2,128,015

December 31, 2012	Pass		Special Mention		Substandard		Doubtful		Total
Commercial	$	498,188	$	2,193	$	9,198	$	30	$	509,609
Agricultural		64,397		342		3,559		8		68,306
Real Estate		1,176,330		14,680		35,673		140		1,226,823
Consumer		271,114		382		911		21		272,428
Total	$	2,010,029	$	17,597	$	49,341	$	199	$	2,077,166

At March 31, 2013 and December 31, 2012, the Company’s past due loans are as follows (in thousands):

March 31, 2013	15-59 Days Past Due*		60-89 Days Past Due		Greater Than 90 Days		Total Past Due		Current		Total Loans		90 Days Past Due Still Accruing
Commercial	$	4,146	$	307	$	283	$	4,736	$	508,686	$	513,422	$	3
Agricultural		641		16		—		657		54,590		55,247		—
Real Estate		14,962		1,653		1,907		18,522		1,257,042		1,275,564		—
Consumer		1,629		227		144		2,000		281,782		283,782		21
Total	$	21,378	$	2,203	$	2,334	$	25,915	$	2,102,100	$	2,128,015	$	24

December 31, 2012	15-59 Days Past Due*		60-89 Days Past Due		Greater Than 90 Days		Total Past Due		Current		Total Loans		90 Days Past Due Still Accruing
Commercial	$	1,708	$	470	$	247	$	2,425	$	507,184	$	509,609	$	—
Agricultural		467		95		—		562		67,744		68,306		—
Real Estate		10,141		2,711		1,237		14,089		1,212,734		1,226,823		34
Consumer		1,660		287		163		2,110		270,318		272,428		63
Total	$	13,976	$	3,563	$	1,647	$	19,186	$	2,057,980	$	2,077,166	$	97

* The Company monitors commercial, agricultural and real estate loans after such loans are 15 days past due. Consumer loans are monitored after such loans are 30 days past due.

The allowance for loan losses as of March 31, 2013 and 2012, and December 31, 2012, is presented below. Management has evaluated the adequacy of the allowance for loan losses by estimating the probable losses in various categories of the loan portfolio, which are identified below (in thousands):

	March 31,				December 31, 2012
	2013		2012
Allowance for loan losses provided for:
Loans specifically evaluated as impaired	$	5,793	$	5,357	$	6,010
Remaining portfolio		28,879		29,172		28,829
Total allowance for loan losses	$	34,672	$	34,529	$	34,839

The following table details the allowance for loan losses at March 31, 2013 and December 31, 2012 by portfolio segment (in thousands). Allocation of a portion of the allowance to one category of loans does not preclude its availability to absorb losses in other categories.

March 31, 2013	Commercial		Agricultural		Real Estate		Consumer		Total
Loans individually evaluated for impairment	$	2,542	$	388	$	8,983	$	315	$	12,228
Loans collectively evaluated for impairment		3,962		1,078		15,878		1,526		22,444
Total	$	6,504	$	1,466	$	24,861	$	1,841	$	34,672

December 31, 2012	Commercial		Agricultural		Real Estate		Consumer		Total
Loans individually evaluated for impairment	$	3,253	$	388	$	8,380	$	308	$	12,329
Loans collectively evaluated for impairment		4,090		1,153		15,683		1,584		22,510
Total	$	7,343	$	1,541	$	24,063	$	1,892	$	34,839

Changes in the allowance for loan losses for the three months ended March 31, 2013 and 2012 are summarized as follows (in thousands):

Three months ended March 31, 2013	Commercial			Agricultural			Real Estate			Consumer			Total
Beginning balance	$	7,343		$	1,541		$	24,063		$	1,892		$	34,839
Provision for loan losses		(672	)		(86	)		1,120			39			401
Recoveries		121			11			28			95			255
Charge-offs		(288	)		—			(350	)		(185	)		(823	)
Ending balance	$	6,504		$	1,466		$	24,861		$	1,841		$	34,672

Three months ended March 31, 2012	Commercial			Agricultural			Real Estate			Consumer			Total
Beginning balance	$	9,664		$	1,482		$	21,533		$	1,636		$	34,315
Provision for loan losses		94			(119	)		1,161			160			1,296
Recoveries		103			12			113			95			323
Charge-offs		(249	)		(22	)		(972	)		(162	)		(1,405	)
Ending balance	$	9,612		$	1,353		$	21,835		$	1,729		$	34,529

The Company’s recorded investment in loans as of March 31, 2013 and December 31, 2012 related to the balance in the allowance for loan losses on the basis of the Company’s impairment methodology was as follows (in thousands):

March 31, 2013	Commercial		Agricultural		Real Estate		Consumer		Total
Loans individually evaluated for impairment	$	11,563	$	3,926	$	53,452	$	1,237	$	70,178
Loans collectively evaluated for impairment		501,859		51,321		1,222,112		282,545		2,057,837
Total	$	513,422	$	55,247	$	1,275,564	$	283,782	$	2,128,015

December 31, 2012	Commercial		Agricultural		Real Estate		Consumer		Total
Loans individually evaluated for impairment	$	11,421	$	3,909	$	50,493	$	1,314	$	67,137
Loans collectively evaluated for impairment		498,188		64,397		1,176,330		271,114		2,010,029
Total	$	509,609	$	68,306	$	1,226,823	$	272,428	$	2,077,166

The Company’s loans that were modified in the three months ended March 31, 2013 and 2012 and considered a troubled debt restructuring are as follows (dollars in thousands):

	Three months ended March 31, 2013						Three months ended March 31, 2012
			Pre-Modification		Post- Modification				Pre-Modification		Post- Modification
			Recorded		Recorded				Recorded		Recorded
	Number		Investment		Investment		Number		Investment		Investment
Commercial		2	$	120	$	120		4	$	127	$	127
Agricultural		1		24		24		2		108		108
Real Estate		4		796		796		13		3,803		3,803
Consumer		—		—		—		—		—		—
Total		7	$	940	$	940		19	$	4,038	$	4,038

The balances below provide information as to how the loans were modified as troubled debt restructured loans during the three months ended March 31, 2013 and 2012 (in thousands):

	Three months ended March 31, 2013						Three months ended March 31, 2012
	Adjusted Interest Rate		Extended Maturity		Combined Rate and Maturity		Adjusted Interest Rate		Extended Maturity		Combined Rate and Maturity
Commercial	$	—	$	120	$	—	$	17	$	62	$	48
Agricultural		—		24		—		—		13		95
Real Estate		272		350		174		—		—		3,803
Consumer		—		—		—		—		—		—
Total	$	272	$	494	$	174	$	17	$	75	$	3,946

During the three months ended March 31, 2013, 11 loans totaling $1,167,000 that had been modified as a troubled debt restructured loan within the previous 12 months defaulted on the modified loan. A default for purposes of this disclosure is a troubled debt restructured loan in which the borrower is 90 days past due or results in the foreclosure and repossession of the applicable collateral. There were no such defaults for the three months ended March 31, 2012. The loans are as follows (dollars in thousands):

	Three months ended March 31, 2013
	Number		Balance
Commercial		5	$	217
Agriculture		—		—
Real Estate		5		931
Consumer		1		19
Total		11	$	1,167

As of March 31, 2013, the Company has no commitments to lend additional funds to loan customers whose terms have been modified in troubled debt restructurings.

Our subsidiary bank has established a line of credit with the Federal Home Loan Bank of Dallas to provide liquidity and meet pledging requirements for those customers eligible to have securities pledged to secure certain uninsured deposits. At March 31, 2013, approximately $1,118,519,000 in loans held by the bank were subject to blanket liens as security for these lines of credit. At March 31, 2013, $68,600,000 in letters of credit issued by the Federal Home Loan Bank of Dallas were outstanding under these lines of credit. The letters of credit were pledged as collateral for public funds held by our bank.

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Income Taxes

3 Months Ended

Mar. 31, 2013

Income Tax Disclosure [Abstract]

Income Taxes

Note 5 – Income Taxes

Income tax expense was $6,182,000 for the first quarter in 2013 as compared to $6,035,000 for the same period in 2012. Our effective tax rates on pretax income were 25.0% and 25.4% for the first quarter of 2013 and 2012, respectively. The effective tax rates differ from the statutory federal tax rate of 35% largely due to tax exempt interest income earned on certain investment securities and loans, the deductibility of dividends paid to our employee stock ownership plan and Texas state taxes.

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Pension Plan

3 Months Ended

Mar. 31, 2013

Compensation And Retirement Disclosure [Abstract]

Pension Plan

Note 7 – Pension Plan

The Company’s defined benefit pension plan was frozen effective January 1, 2004, whereby no additional years of service will accrue to participants, unless the pension plan is reinstated at a future date. The pension plan covered substantially all of the Company’s employees at the time. The benefits for each employee were based on years of service and a percentage of the employee’s qualifying compensation during the final years of employment. The Company’s funding policy was and is to contribute annually the amount necessary to satisfy the Internal Revenue Service’s funding standards. Contributions to the pension plan, prior to freezing the plan, were intended to provide not only for benefits attributed to service to date but also for those expected to be earned in the future. As a result of the Pension Protection Act of 2006 (the “Protection Act”), the Company will be required to contribute amounts in future years to fund any shortfalls. The Company has evaluated the provisions of the Protection Act as well as the Internal Revenue Service’s funding standards to develop a plan for funding in future years. The Company made a contribution totaling $2,000,000 in 2012 and has to date made no contributions in 2013.

Net periodic benefit costs totaling $208,000 and $185,000 were recorded, respectively, for the three months ended March 31, 2013 and 2012.

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Loans and Allowance for Loan Losses - Schedule of Impaired Loans and Related Allowance (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Financing Receivable, Recorded Investment, Past Due [Line Items]
Unpaid Contractual Principal Balance	$ 27,447	$ 25,638	$ 26,170
Recorded Investment With No Allowance	2,083	3,549	2,184
Recorded Investment With Allowance	20,426	17,414	19,616
Total Recorded Investment	22,509	20,963	21,800
Related Allowance	5,793	5,357	6,010
Average Recorded Investment	23,163	21,957	24,025
Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Unpaid Contractual Principal Balance	1,555	4,218	2,677
Recorded Investment With No Allowance	25	24	20
Recorded Investment With Allowance	1,108	3,641	2,231
Total Recorded Investment	1,133	3,665	2,251
Related Allowance	555	1,990	1,350
Average Recorded Investment	1,232	3,817	2,966
Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Unpaid Contractual Principal Balance	489	948	381
Recorded Investment With No Allowance	25
Recorded Investment With Allowance	448	923	372
Total Recorded Investment	473	923	372
Related Allowance	169	170	131
Average Recorded Investment	483	922	437
Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Unpaid Contractual Principal Balance	24,937	20,058	22,569
Recorded Investment With No Allowance	1,956	3,470	2,049
Recorded Investment With Allowance	18,546	12,556	16,649
Total Recorded Investment	20,502	16,026	18,698
Related Allowance	4,901	3,082	4,356
Average Recorded Investment	21,028	16,838	20,164
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Unpaid Contractual Principal Balance	466	414	543
Recorded Investment With No Allowance	77	55	115
Recorded Investment With Allowance	324	294	364
Total Recorded Investment	401	349	479
Related Allowance	168	115	173
Average Recorded Investment	$ 420	$ 380	$ 458

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Acquisition Definitive Agreement Signed - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Feb. 20, 2013
Business Combinations [Abstract]
Combination of cash and stock purchase price	$ 56.0

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Loans and Allowance for Loan Losses (Tables)

3 Months Ended

Mar. 31, 2013

Receivables [Abstract]

Major Classifications of Loans Held for Investment

Major classifications of loans held for investment are as follows (in thousands):

	March 31,				December 31, 2012
	2013		2012
Commercial	$	513,422	$	433,351	$	509,609
Agricultural		55,247		57,977		68,306
Real estate		1,275,564		1,083,244		1,226,823
Consumer		283,782		218,600		272,428
Total loans held for investment	$	2,128,015	$	1,793,172	$	2,077,166

Non-Accrual Loans, Loans Still Accruing and Past Due 90 Days or More and Restructured Loans

The Company’s non-accrual loans, loans still accruing and past due 90 days or more and restructured loans are as follows (in thousands):

	March 31,				December 31, 2012
	2013		2012
Non-accrual loans	$	22,509	$	20,963	$	21,800
Loans still accruing and past due 90 days or more		24		53		97
Restructured loans*		—		—		—
Total	$	22,533	$	21,016	$	21,897

* Restructured loans whose interest collection, after considering economic and business conditions and collection efforts, is doubtful are included in non-accrual loans.

Recorded Investment in Impaired Loans and Related Valuation Allowance

The Company’s recorded investment in impaired loans and the related valuation allowance are as follows (in thousands):

March 31, 2013		March 31, 2012		December 31, 2012
Recorded Investment	Valuation Allowance	Recorded Investment	Valuation Allowance	Recorded Investment	Valuation Allowance
$ 22,509	$5,793	$20,963	$5,357	$21,800	$6,010

Schedule of Non-Accrual Loans

Non-accrual loans totaled $22,509,000, $20,963,000 and $21,800,000, respectively, and consisted of the following amounts by type (in thousands):

	March 31,				December 31, 2012
	2013		2012
Commercial	$	1,133	$	3,665	$	2,251
Agricultural		473		923		372
Real estate		20,502		16,026		18,698
Consumer		401		349		479
Total	$	22,509	$	20,963	$	21,800

Schedule of Impaired Loans and Related Allowance

The Company’s impaired loans and related allowance as of March 31, 2013 and 2012, and December 31, 2012, are summarized in the following table (in thousands). No interest income was recognized on impaired loans subsequent to their classification as impaired.

March 31, 2013	Unpaid Contractual Principal Balance		Recorded Investment With No Allowance		Recorded Investment With Allowance		Total Recorded Investment		Related Allowance		Three-month Average Recorded Investment
Commercial	$	1,555	$	25	$	1,108	$	1,133	$	555	$	1,232
Agricultural		489		25		448		473		169		483
Real Estate		24,937		1,956		18,546		20,502		4,901		21,028
Consumer		466		77		324		401		168		420
Total	$	27,447	$	2,083	$	20,426	$	22,509	$	5,793	$	23,163

March 31, 2012	Unpaid Contractual Principal Balance		Recorded Investment With No Allowance		Recorded Investment With Allowance		Total Recorded Investment		Related Allowance		Three-month Average Recorded Investment
Commercial	$	4,218	$	24	$	3,641	$	3,665	$	1,990	$	3,817
Agricultural		948		—		923		923		170		922
Real Estate		20,058		3,470		12,556		16,026		3,082		16,838
Consumer		414		55		294		349		115		380
Total	$	25,638	$	3,549	$	17,414	$	20,963	$	5,357	$	21,957

December 31, 2012	Unpaid Contractual Principal Balance		Recorded Investment With No Allowance		Recorded Investment With Allowance		Total Recorded Investment		Related Allowance		Year-to-Date Average Recorded Investment
Commercial	$	2,677	$	20	$	2,231	$	2,251	$	1,350	$	2,966
Agricultural		381		—		372		372		131		437
Real Estate		22,569		2,049		16,649		18,698		4,356		20,164
Consumer		543		115		364		479		173		458
Total	$	26,170	$	2,184	$	19,616	$	21,800	$	6,010	$	24,025

Schedule of Internal Ratings of Loans Held for Investment

At March 31, 2013 and December 31, 2012, the following summarizes the Company’s internal ratings of its loans held for investment (in thousands):

March 31, 2013	Pass		Special Mention		Substandard		Doubtful		Total
Commercial	$	501,859	$	2,083	$	9,449	$	31	$	513,422
Agricultural		51,321		337		3,582		7		55,247
Real Estate		1,222,112		15,015		38,281		156		1,275,564
Consumer		282,545		349		870		18		283,782
Total	$	2,057,837	$	17,784	$	52,182	$	212	$	2,128,015

December 31, 2012	Pass		Special Mention		Substandard		Doubtful		Total
Commercial	$	498,188	$	2,193	$	9,198	$	30	$	509,609
Agricultural		64,397		342		3,559		8		68,306
Real Estate		1,176,330		14,680		35,673		140		1,226,823
Consumer		271,114		382		911		21		272,428
Total	$	2,010,029	$	17,597	$	49,341	$	199	$	2,077,166

Schedule of Past Due Loans

At March 31, 2013 and December 31, 2012, the Company’s past due loans are as follows (in thousands):

March 31, 2013	15-59 Days Past Due*		60-89 Days Past Due		Greater Than 90 Days		Total Past Due		Current		Total Loans		90 Days Past Due Still Accruing
Commercial	$	4,146	$	307	$	283	$	4,736	$	508,686	$	513,422	$	3
Agricultural		641		16		—		657		54,590		55,247		—
Real Estate		14,962		1,653		1,907		18,522		1,257,042		1,275,564		—
Consumer		1,629		227		144		2,000		281,782		283,782		21
Total	$	21,378	$	2,203	$	2,334	$	25,915	$	2,102,100	$	2,128,015	$	24

December 31, 2012	15-59 Days Past Due*		60-89 Days Past Due		Greater Than 90 Days		Total Past Due		Current		Total Loans		90 Days Past Due Still Accruing
Commercial	$	1,708	$	470	$	247	$	2,425	$	507,184	$	509,609	$	—
Agricultural		467		95		—		562		67,744		68,306		—
Real Estate		10,141		2,711		1,237		14,089		1,212,734		1,226,823		34
Consumer		1,660		287		163		2,110		270,318		272,428		63
Total	$	13,976	$	3,563	$	1,647	$	19,186	$	2,057,980	$	2,077,166	$	97

* The Company monitors commercial, agricultural and real estate loans after such loans are 15 days past due. Consumer loans are monitored after such loans are 30 days past due.

Allowance for Loan Losses by Estimating Probable Losses in Various Categories of Loan Portfolio

The allowance for loan losses as of March 31, 2013 and 2012, and December 31, 2012, is presented below. Management has evaluated the adequacy of the allowance for loan losses by estimating the probable losses in various categories of the loan portfolio, which are identified below (in thousands):

	March 31,				December 31, 2012
	2013		2012
Allowance for loan losses provided for:
Loans specifically evaluated as impaired	$	5,793	$	5,357	$	6,010
Remaining portfolio		28,879		29,172		28,829
Total allowance for loan losses	$	34,672	$	34,529	$	34,839

Schedule of Allowance for Loan Losses by Portfolio Segment

The following table details the allowance for loan losses at March 31, 2013 and December 31, 2012 by portfolio segment (in thousands). Allocation of a portion of the allowance to one category of loans does not preclude its availability to absorb losses in other categories.

March 31, 2013	Commercial		Agricultural		Real Estate		Consumer		Total
Loans individually evaluated for impairment	$	2,542	$	388	$	8,983	$	315	$	12,228
Loans collectively evaluated for impairment		3,962		1,078		15,878		1,526		22,444
Total	$	6,504	$	1,466	$	24,861	$	1,841	$	34,672

December 31, 2012	Commercial		Agricultural		Real Estate		Consumer		Total
Loans individually evaluated for impairment	$	3,253	$	388	$	8,380	$	308	$	12,329
Loans collectively evaluated for impairment		4,090		1,153		15,683		1,584		22,510
Total	$	7,343	$	1,541	$	24,063	$	1,892	$	34,839

Changes in Allowance for Loan Losses

Changes in the allowance for loan losses for the three months ended March 31, 2013 and 2012 are summarized as follows (in thousands):

Three months ended March 31, 2013	Commercial			Agricultural			Real Estate			Consumer			Total
Beginning balance	$	7,343		$	1,541		$	24,063		$	1,892		$	34,839
Provision for loan losses		(672	)		(86	)		1,120			39			401
Recoveries		121			11			28			95			255
Charge-offs		(288	)		—			(350	)		(185	)		(823	)
Ending balance	$	6,504		$	1,466		$	24,861		$	1,841		$	34,672

Three months ended March 31, 2012	Commercial			Agricultural			Real Estate			Consumer			Total
Beginning balance	$	9,664		$	1,482		$	21,533		$	1,636		$	34,315
Provision for loan losses		94			(119	)		1,161			160			1,296
Recoveries		103			12			113			95			323
Charge-offs		(249	)		(22	)		(972	)		(162	)		(1,405	)
Ending balance	$	9,612		$	1,353		$	21,835		$	1,729		$	34,529

Schedule of Investment in Loans Related to Balance in Allowance for Loan Losses on Basis of Company's Impairment Methodology

The Company’s recorded investment in loans as of March 31, 2013 and December 31, 2012 related to the balance in the allowance for loan losses on the basis of the Company’s impairment methodology was as follows (in thousands):

March 31, 2013	Commercial		Agricultural		Real Estate		Consumer		Total
Loans individually evaluated for impairment	$	11,563	$	3,926	$	53,452	$	1,237	$	70,178
Loans collectively evaluated for impairment		501,859		51,321		1,222,112		282,545		2,057,837
Total	$	513,422	$	55,247	$	1,275,564	$	283,782	$	2,128,015

December 31, 2012	Commercial		Agricultural		Real Estate		Consumer		Total
Loans individually evaluated for impairment	$	11,421	$	3,909	$	50,493	$	1,314	$	67,137
Loans collectively evaluated for impairment		498,188		64,397		1,176,330		271,114		2,010,029
Total	$	509,609	$	68,306	$	1,226,823	$	272,428	$	2,077,166

Schedule of Loans Modified and Considered Troubled Debt Restructuring

The Company’s loans that were modified in the three months ended March 31, 2013 and 2012 and considered a troubled debt restructuring are as follows (dollars in thousands):

	Three months ended March 31, 2013						Three months ended March 31, 2012
			Pre- Modification		Post- Modification				Pre- Modification		Post- Modification
			Recorded		Recorded				Recorded		Recorded
	Number		Investment		Investment		Number		Investment		Investment
Commercial		2	$	120	$	120		4	$	127	$	127
Agricultural		1		24		24		2		108		108
Real Estate		4		796		796		13		3,803		3,803
Consumer		—		—		—		—		—		—
Total		7	$	940	$	940		19	$	4,038	$	4,038

Schedule of How Loans Were Modified as Troubled Debt Restructured Loans

The balances below provide information as to how the loans were modified as troubled debt restructured loans during the three months ended March 31, 2013 and 2012 (in thousands):

	Three months ended March 31, 2013						Three months ended March 31, 2012
	Adjusted Interest Rate		Extended Maturity		Combined Rate and Maturity		Adjusted Interest Rate		Extended Maturity		Combined Rate and Maturity
Commercial	$	—	$	120	$	—	$	17	$	62	$	48
Agricultural		—		24		—		—		13		95
Real Estate		272		350		174		—		—		3,803
Consumer		—		—		—		—		—		—
Total	$	272	$	494	$	174	$	17	$	75	$	3,946

Schedule of Troubled Debt Restructuring

The loans are as follows (dollars in thousands):

	Three months ended March 31, 2013
	Number		Balance
Commercial		5	$	217
Agriculture		—		—
Real Estate		5		931
Consumer		1		19
Total		11	$	1,167

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Interest-bearing Time Deposits in Banks and Securities - Summary of Available-for-Sale and Held-to-Maturity Securities (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Securities available-for-sale, Amortized Cost Basis	$ 1,872,690	$ 1,727,237
Securities available-for-sale, Gross Unrealized Holding Gains	87,492	92,693
Securities available-for-sale, Gross Unrealized Holding Losses	(2,031)	(895)
Securities available-for-sale, Estimated Fair Value	1,958,151	1,819,035	1,960,760
Securities held-to-maturity, Amortized Cost Basis	903	1,061	2,581
Securities held-to-maturity, Gross Unrealized Holding Gains	17	19
Securities held-to-maturity, Gross Unrealized Holding Losses
Securities held-to-maturity, Estimated Fair Value	920	1,080	2,612
U.S. Treasury securities [Member]
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Securities available-for-sale, Amortized Cost Basis	6,017	6,042
Securities available-for-sale, Gross Unrealized Holding Gains	23	48
Securities available-for-sale, Gross Unrealized Holding Losses
Securities available-for-sale, Estimated Fair Value	6,040	6,090
Obligations of U.S. government sponsored-enterprises and agencies [Member]
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Securities available-for-sale, Amortized Cost Basis	189,913	219,420
Securities available-for-sale, Gross Unrealized Holding Gains	3,451	4,060
Securities available-for-sale, Gross Unrealized Holding Losses
Securities available-for-sale, Estimated Fair Value	193,364	223,480
Obligations of states and political subdivisions [Member]
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Securities available-for-sale, Amortized Cost Basis	865,282	786,278
Securities available-for-sale, Gross Unrealized Holding Gains	53,191	57,541
Securities available-for-sale, Gross Unrealized Holding Losses	(558)	(129)
Securities available-for-sale, Estimated Fair Value	917,915	843,690
Securities held-to-maturity, Amortized Cost Basis	595	735
Securities held-to-maturity, Gross Unrealized Holding Gains	5	7
Securities held-to-maturity, Gross Unrealized Holding Losses
Securities held-to-maturity, Estimated Fair Value	600	742
Corporate bonds and other [Member]
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Securities available-for-sale, Amortized Cost Basis	111,669	117,244
Securities available-for-sale, Gross Unrealized Holding Gains	5,553	6,020
Securities available-for-sale, Gross Unrealized Holding Losses		(73)
Securities available-for-sale, Estimated Fair Value	117,222	123,191
Residential mortgage-backed securities [Member]
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Securities available-for-sale, Amortized Cost Basis	592,911	564,434
Securities available-for-sale, Gross Unrealized Holding Gains	23,866	23,285
Securities available-for-sale, Gross Unrealized Holding Losses	(213)	(443)
Securities available-for-sale, Estimated Fair Value	616,564	587,276
Securities held-to-maturity, Amortized Cost Basis	308	294
Securities held-to-maturity, Gross Unrealized Holding Gains	12	11
Securities held-to-maturity, Gross Unrealized Holding Losses
Securities held-to-maturity, Estimated Fair Value	320	305
Commercial mortgage-backed securities [Member]
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Securities available-for-sale, Amortized Cost Basis	106,898	33,819
Securities available-for-sale, Gross Unrealized Holding Gains	1,408	1,739
Securities available-for-sale, Gross Unrealized Holding Losses	(1,260)	(250)
Securities available-for-sale, Estimated Fair Value	107,046	35,308
Securities held-to-maturity, Amortized Cost Basis		32
Securities held-to-maturity, Gross Unrealized Holding Gains		1
Securities held-to-maturity, Gross Unrealized Holding Losses
Securities held-to-maturity, Estimated Fair Value		$ 33

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Fair Value Disclosures - Other Real Estate Owned (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Fair Value Disclosures [Abstract]
Carrying value of other real estate owned prior to re-measurement	$ 1,827	$ 417
Write-downs included in gain (loss) on sale of other real estate owned	(304)	(101)
Fair value	$ 1,523	$ 316

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Loans and Allowance for Loan Losses - Schedule of Loans Modified and Considered Troubled Debt Restructuring (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013 SecurityLoan	Mar. 31, 2012 SecurityLoan
Troubled Debt Restructured Loan Modifications by Class [Line Items]
Number	7	19
Pre-Modification Recorded Investment	$ 940	$ 4,038
Post-Modification Recorded Investment	940	4,038
Commercial [Member]
Troubled Debt Restructured Loan Modifications by Class [Line Items]
Number	2	4
Pre-Modification Recorded Investment	120	127
Post-Modification Recorded Investment	120	127
Agricultural [Member]
Troubled Debt Restructured Loan Modifications by Class [Line Items]
Number	1	2
Pre-Modification Recorded Investment	24	108
Post-Modification Recorded Investment	24	108
Real Estate [Member]
Troubled Debt Restructured Loan Modifications by Class [Line Items]
Number	4	13
Pre-Modification Recorded Investment	796	3,803
Post-Modification Recorded Investment	796	3,803
Consumer [Member]
Troubled Debt Restructured Loan Modifications by Class [Line Items]
Number
Pre-Modification Recorded Investment
Post-Modification Recorded Investment

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CONSOLIDATED STATEMENTS OF EARNINGS (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Income Statement [Abstract]
Reclassification adjustment for realized gains on investment securities included in net earnings, before income tax	$ 222	$ 346
Income tax expense from reclassification items	$ 78	$ 121

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Basis of Presentation

3 Months Ended

Mar. 31, 2013

Accounting Policies [Abstract]

Basis of Presentation

Note 1—Basis of Presentation

The interim consolidated financial statements include the accounts of the Company, a Texas corporation and a financial holding company registered under the Bank Holding Company Act of 1956, as amended, or BHCA, and its wholly-owned subsidiaries: First Financial Bank, National Association, Abilene, Texas; First Technology Services, Inc.; First Financial Trust & Asset Management Company, National Association; First Financial Investments, Inc.; and First Financial Insurance Agency, Inc.

Through our subsidiary bank, we conduct full-service commercial banking business. Our banking centers are located primarily in Central, North Central and West Texas. As of March 31, 2013, we had 56 financial centers across Texas, with eleven locations in Abilene, two locations in Cleburne, two locations in Stephenville, two locations in Granbury, three locations in San Angelo, three locations in Weatherford, and one location each in Mineral Wells, Hereford, Sweetwater, Eastland, Ranger, Rising Star, Cisco, Southlake, Grapevine, Aledo, Willow Park, Brock, Alvarado, Burleson, Keller, Trophy Club, Boyd, Bridgeport, Decatur, Roby, Trent, Merkel, Clyde, Moran, Albany, Midlothian, Crowley, Glen Rose, Odessa, Waxahachie, Acton, Fort Worth and Huntsville. Our trust subsidiary has six locations which consist of Abilene, San Angelo, Stephenville, Sweetwater, Fort Worth and Odessa, all in Texas.

In the opinion of management, the unaudited interim consolidated financial statements reflect all adjustments necessary for a fair presentation of the Company’s financial position and unaudited results of operations and should be read in conjunction with the Company’s audited consolidated financial statements, and notes thereto in the Company’s Annual Report on Form 10-K, for the year ended December 31, 2012. All adjustments were of a normal recurring nature. However, the results of operations for the three months ended March 31, 2013, are not necessarily indicative of the results to be expected for the year ending December 31, 2013, due to seasonality, changes in economic conditions and loan credit quality, interest rate fluctuations, regulatory and legislative changes and other factors. Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States have been condensed or omitted under SEC rules and regulations. The Company evaluated subsequent events for potential recognition and/or disclosure through the date the consolidated financial statements were issued.

Effective December 30, 2012, the Company consolidated its eleven bank charters into one charter. The Company cited regulatory, compliance and technology complexities and the opportunity for cost savings as its reason for making this change. The Company noted it expects to operate the one charter as it previously did with eleven charters with local management and board decisions to benefit the customers and communities it serves.

On October 26, 2011, the Company’s Board of Directors authorized the repurchase of up to 750,000 common shares through September 30, 2014. The stock buyback plan authorizes management to repurchase the stock at such time as repurchases are considered beneficial to shareholders. Any repurchase of stock will be made through the open market, block trades or in privately negotiated transactions in accordance with applicable laws and regulations. Under the repurchase plan, there is no minimum number of shares that the Company is required to repurchase. Through March 31, 2013, no shares have been repurchased under this authorization.

On April 24, 2012, the Company’s shareholders approved an amendment to the Company’s Amended and Restated Certificate of Formation to increase the number of authorized common shares to 80,000,000.

Goodwill and other intangible assets are evaluated annually for impairment as of the end of the second quarter. No such impairment has been noted in connection with the current or any prior evaluations.

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Interest-bearing Time Deposits in Banks and Securities - Amortized Cost and Estimated Fair Value of Debt Securities (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013
Investments Debt And Equity Securities [Abstract]
Available-for-Sale, Amortized Cost Basis, Due within one year	$ 142,205
Available-for-Sale, Amortized Cost Basis, Due after one year through five years	509,641
Available-for-Sale, Amortized Cost Basis, Due after five years through ten years	495,789
Available-for-Sale, Amortized Cost Basis, Due after ten years	25,246
Available-for-Sale, Amortized Cost Basis, Mortgage-backed securities	699,809
Available-for-Sale, Amortized Cost Basis, Total	1,872,690
Available-for-Sale, Estimated Fair Value, Due within one year	144,366
Available-for-Sale, Estimated Fair Value, Due after one year through five years	532,461
Available-for-Sale, Estimated Fair Value, Due after five years through ten years	530,064
Available-for-Sale, Estimated Fair Value, Due after ten years	27,650
Available-for-Sale, Estimated Fair Value, Mortgage-backed securities	723,610
Available-for-Sale, Estimated Fair Value, Total	1,958,151
Held-to-Maturity, Amortized Cost Basis, Due within one year	595
Held-to-Maturity, Amortized Cost Basis, Due after one year through five years
Held-to-Maturity, Amortized Cost Basis, Due after five years through ten years
Held-to-Maturity, Amortized Cost Basis, Due after ten years
Held-to-Maturity, Amortized Cost Basis, Mortgage-backed securities	308
Held-to-Maturity, Amortized Cost Basis, Total	903
Held-to-Maturity, Estimated Fair Value, Due within one year	600
Held-to-Maturity, Estimated Fair Value, Due after one year through five years
Held-to-Maturity, Estimated Fair Value, Due after five years through ten years
Held-to-Maturity, Estimated Fair Value, Due after ten years
Held-to-Maturity, Estimated Fair Value, Mortgage-backed securities	320
Held-to-Maturity, Estimated Fair Value, Total	$ 920

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Loans and Allowance for Loan Losses - Schedule of Allowance for Loan Losses by Portfolio Segment (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Dec. 31, 2011
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment	$ 12,228	$ 12,329
Loans collectively evaluated for impairment	22,444	22,510
Total allowance for loan losses	34,672	34,839	34,529	34,315
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment	2,542	3,253
Loans collectively evaluated for impairment	3,962	4,090
Total allowance for loan losses	6,504	7,343	9,612	9,664
Agricultural [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment	388	388
Loans collectively evaluated for impairment	1,078	1,153
Total allowance for loan losses	1,466	1,541	1,353	1,482
Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment	8,983	8,380
Loans collectively evaluated for impairment	15,878	15,683
Total allowance for loan losses	24,861	24,063	21,835	21,533
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment	315	308
Loans collectively evaluated for impairment	1,526	1,584
Total allowance for loan losses	$ 1,841	$ 1,892	$ 1,729	$ 1,636

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Interest-bearing Time Deposits in Banks and Securities (Tables)

3 Months Ended

Mar. 31, 2013

Investments Debt And Equity Securities [Abstract]

Summary of Available-for-Sale and Held-to-Maturity Securities

A summary of available-for-sale and held-to-maturity securities follows (in thousands):

	March 31, 2013
	Amortized Cost Basis		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses			Estimated Fair Value
Securities available-for-sale:
U.S. Treasury securities	$	6,017	$	23	$	—		$	6,040
Obligations of U.S. government sponsored-enterprises and agencies		189,913		3,451		—			193,364
Obligations of states and political subdivisions		865,282		53,191		(558	)		917,915
Corporate bonds and other		111,669		5,553		—			117,222
Residential mortgage-backed securities		592,911		23,866		(213	)		616,564
Commercial mortgage-backed securities		106,898		1,408		(1,260	)		107,046
Total securities available-for-sale	$	1,872,690	$	87,492	$	(2,031	)	$	1,958,151
Securities held-to-maturity:
Obligations of states and political subdivisions	$	595	$	5	$	—		$	600
Residential mortgage-backed securities		308		12		—			320
Total debt securities held-to-maturity	$	903	$	17	$	—		$	920

	December 31, 2012
	Amortized Cost Basis		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses			Estimated Fair Value
Securities available-for-sale:
U.S. Treasury securities	$	6,042	$	48	$	—		$	6,090
Obligations of U.S. government sponsored-enterprises and agencies		219,420		4,060		—			223,480
Obligations of states and political subdivisions		786,278		57,541		(129	)		843,690
Corporate bonds and other		117,244		6,020		(73	)		123,191
Residential mortgage-backed securities		564,434		23,285		(443	)		587,276
Commercial mortgage-backed securities		33,819		1,739		(250	)		35,308
Total securities available-for-sale	$	1,727,237	$	92,693	$	(895	)	$	1,819,035
Securities held-to-maturity:
Obligations of states and political subdivisions	$	735	$	7	$	—		$	742
Residential mortgage-backed securities		294		11		—			305
Commercial mortgage-backed securities		32		1		—			33
Total debt securities held-to-maturity	$	1,061	$	19	$	—		$	1,080

Amortized Cost and Estimated Fair Value of Debt Securities

The amortized cost and estimated fair value of debt securities at March 31, 2013, by contractual and expected maturity, are shown below (in thousands):

	Available-for-Sale				Held-to-Maturity
	Amortized Cost Basis		Estimated Fair Value		Amortized Cost Basis		Estimated Fair Value
Due within one year	$	142,205	$	144,366	$	595	$	600
Due after one year through five years		509,641		532,461		—		—
Due after five years through ten years		495,789		530,064		—		—
Due after ten years		25,246		27,650		—		—
Mortgage-backed securities		699,809		723,610		308		320
Total	$	1,872,690	$	1,958,151	$	903	$	920

Continuous Unrealized-Loss Position of Available-For-Sale and Held-To-Maturity Securities

The following tables disclose, as of March 31, 2013 and December 31, 2012, the Company’s investment securities that have been in a continuous unrealized-loss position for less than 12 months and for 12 months or longer (in thousands):

	Less than 12 Months				12 Months or Longer				Total
March 31, 2013	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Obligations of states and political subdivisions	$	42,102	$	558	$	—	$	—	$	42,102	$	558
Residential mortgage-backed securities		8,664		9		14,885		204		23,549		213
Commercial mortgage-backed securities		38,472		1,260		—		—		38,472		1,260
Total	$	89,238	$	1,827	$	14,885	$	204	$	104,123	$	2,031
	Less than 12 Months				12 Months or Longer				Total
December 31, 2012	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Obligations of states and political subdivisions	$	36,480	$	129	$	—	$	—	$	36,480	$	129
Residential mortgage-backed securities		17,344		401		3,574		42		20,918		443
Commercial mortgage-backed securities		12,453		250		—		—		12,453		250
Corporate bonds and other		4,994		73		—		—		4,994		73
Total	$	71,271	$	853	$	3,574	$	42	$	74,845	$	895