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 June 30, 2019

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  ☒    No  ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).    Yes  ☒    No  ☐

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

Large accelerated filer	☒	Accelerated filer	☐
Non-accelerated filer	☐	Smaller reporting company	☐
		Emerging growth company	☐

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Class A Common Stock, $0.01 par value	FFIN	NASDAQ Global Select Market

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ☐

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

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 July 30,  2019
Common Stock, $0.01 par value per share	135,809,224

TABLE OF

CONTENTS

PART I

FINANCIAL INFORMAT​​​​​​​ION

Item		Page
1.	Financial Statements		2
	Consolidated Balance Sheets – Unaudited		3
	Consolidated Statements of Earnings – Unaudited		4
	Consolidated Statements of Comprehensive Earnings – Unaudited		5
	Consolidated Statements of Shareholders’ Equity – Unaudited		6
	Consolidated Statements of Cash Flows – Unaudited		7
	Notes to Consolidated Financial Statements – Unaudited		8
2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations		35
3.	Quantitative and Qualitative Disclosures About Market Risk		55
4.	Controls and Procedures		55
	PART II
	OTHER INFORMATION
1.	Legal Proceedings		56
1A.	Risk Factors		56
2.	Unregistered Sales of Equity Securities and Use of Proceeds		56
3.	Defaults Upon Senior Securities		56
4.	Mine Safety Disclosures		56
5.	Other Information		56
6.	Exhibits		57
	Signatures		58

1

PART I

FINANCIAL INFORMATION

Item 1. Financial Statements.

The consolidated balance sheets of First Financial Bankshares, Inc. (the “Company” or “we”) at June 30, 2019 and 2018 and December 31, 2018, and the consolidated statements of earnings, comprehensive earnings and shareholders’ equity for the three and six months ended June 30, 2019 and 2018, and the consolidated statements of cash flows for the six months ended June 30, 2019 and 2018, follow on pages 3 through 7.

2

FIRST FINANCIAL BANKSHARES, INC.​​​​​​​ AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

(Dollars in thousands, except per share amounts)

	June 30,						December 31,
	2019			2018			2018
	(Unaudited)
ASSETS
CASH AND DUE FROM BANKS	$	178,345		$	178,217		$	207,835
FEDERAL FUNDS SOLD		700			8,450			—
INTEREST-BEARING DEPOSITS IN BANKS		128,652			99,499			40,812
Total cash and cash equivalents		307,697			286,166			248,647
INTEREST-BEARING TIME DEPOSITS IN BANKS		960			1,458			1,458
SECURITIES AVAILABLE-FOR-SALE, at fair value		3,259,492			3,197,567			3,158,777
LOANS:
Held for investment		4,040,952			3,831,480			3,953,636
Less – allowance for loan losses		(51,820	)		(49,951	)		(51,202	)
Net loans held for investment		3,989,132			3,781,529			3,902,434
Held-for-sale ($18,981, $5,061 and $19,185 at fair value at June 30, 2019 and 2018 and December 31, 2018, respectively)		22,305			24,289			21,672
Net loans		4,011,437			3,805,818			3,924,106
BANK PREMISES AND EQUIPMENT, net		134,322			130,366			133,421
INTANGIBLE ASSETS		174,151			175,185			174,683
OTHER ASSETS		91,234			88,910			90,762
Total assets	$	7,979,293		$	7,685,470		$	7,731,854
LIABILITIES AND SHAREHOLDERS’ EQUITY
NONINTEREST-BEARING DEPOSITS	$	2,167,552		$	2,105,953		$	2,116,107
INTEREST-BEARING DEPOSITS		4,202,214			4,104,654			4,064,282
Total deposits		6,369,766			6,210,607			6,180,389
DIVIDENDS PAYABLE		16,294			14,211			14,227
BORROWINGS		362,005			456,935			468,706
OTHER LIABILITIES		66,480			18,089			15,237
Total liabilities		6,814,545			6,699,842			6,678,559
COMMITMENTS AND CONTINGENCIES
SHAREHOLDERS’ EQUITY:
Common stock – ($0.01 par value, authorized 200,000,000 shares; 135,809,224, 67,669,658 and 67,753,133 shares issued at June 30, 2019 and 2018 and December 31, 2018, respectively)		1,358			677			678
Capital surplus		448,349			439,731			443,114
Retained earnings		655,794			556,615			606,658
Treasury stock (shares at cost: 929,441, 491,170 and 467,811 at June 30, 2019 and 2018 and December 31, 2018, respectively)		(7,823	)		(7,419	)		(7,507	)
Deferred compensation		7,823			7,419			7,507
Accumulated other comprehensive earnings (loss)		59,247			(11,395	)		2,845
Total shareholders’ equity		1,164,748			985,628			1,053,295
Total liabilities and shareholders’ equity	$	7,979,293		$	7,685,470		$	7,731,854

See notes to consolidated financial statements.

3

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF EARNINGS – (UNAUDITED)

(Dollars in thousands, except per share amounts)

	Three Months Ended  June 30,				Six Months Ended  June 30,
	2019		2018		2019		2018
INTEREST INCOME:
Interest and fees on loans	$	55,740	$	49,105	$	108,971	$	95,851
Interest on investment securities:
Taxable		13,925		12,719		27,213		24,073
Exempt from federal income tax		9,244		9,983		19,007		20,324
Interest on federal funds sold and interest-bearing deposits in banks		667		271		1,286		912
Total interest income		79,576		72,078		156,477		141,160
INTEREST EXPENSE:
Interest on deposits		7,286		4,005		13,947		7,524
Other		675		462		1,401		576
Total interest expense		7,961		4,467		15,348		8,100
Net interest income		71,615		67,611		141,129		133,060
PROVISION FOR LOAN LOSSES		600		1,105		1,565		2,415
Net interest income after provision for loan losses		71,015		66,506		139,564		130,645
NONINTEREST INCOME:
Trust fees		7,027		7,070		14,006		13,975
Service charges on deposit accounts		5,374		5,375		10,550		10,259
ATM, interchange and credit card fees		7,352		7,041		14,192		14,037
Real estate mortgage operations		4,721		3,951		8,195		6,884
Net gain on sale of available-for-sale securities (includes $676 and $67 for the three months ended June 30, 2019 and 2018, respectively, and $676 and $1,288 for the six months ended June 30, 2019 and 2018, respectively, related to accumulated other comprehensive earnings reclassifications)		676		67		676		1,288
Net gain (loss) on sale of foreclosed assets		53		19		122		118
Net gain (loss) on sale of assets		6		—		6		(91	)
Interest on loan recoveries		903		289		1,241		408
Other		1,864		1,676		3,425		3,034
Total noninterest income		27,976		25,488		52,413		49,912
NONINTEREST EXPENSE:
Salaries and employee benefits		27,394		26,862		53,918		53,065
Loss from partial settlement of pension plan		—		—		900		—
Net occupancy expense		2,779		2,806		5,542		5,689
Equipment expense		2,827		3,440		5,954		6,957
FDIC insurance premiums		538		632		1,076		1,199
ATM, interchange and credit card expenses		2,427		2,205		4,810		4,348
Professional and service fees		1,987		2,026		3,820		4,439
Printing, stationery and supplies		502		612		868		1,098
Operational and other losses		480		305		746		871
Software amortization and expense		1,287		479		2,210		1,003
Amortization of intangible assets		264		384		532		771
Other		7,819		7,393		15,297		15,503
Total noninterest expense		48,304		47,144		95,673		94,943
EARNINGS BEFORE INCOME TAXES		50,687		44,850		96,304		85,614
INCOME TAX EXPENSE (includes $142 and $14 for the three months ended June 30, 2019 and 2018, respectively, and $142 and $270 for the six months ended June 30, 2019 and 2018, respectively, related to income tax expense from reclassification items)		8,594		7,217		15,959		13,462
NET EARNINGS	$	42,093	$	37,633	$	80,345	$	72,152
EARNINGS PER SHARE, BASIC	$	0.31	$	0.28	$	0.59	$	0.53
EARNINGS PER SHARE, ASSUMING DILUTION	$	0.31	$	0.28	$	0.59	$	0.53
DIVIDENDS PER SHARE	$	0.12	$	0.11	$	0.23	$	0.20

See notes to consolidated financial statements.

4

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF COMPREHENSIVE EARNINGS – (UNAUDITED)

(Dollars in thousands)

	Three Months Ended  June 30,						Six Months Ended  June 30,
	2019			2018			2019			2018
NET EARNINGS	$	42,093		$	37,633		$	80,345		$	72,152
OTHER ITEMS OF COMPREHENSIVE EARNINGS (LOSS):
Change in unrealized gain on investment securities available-for-sale, before income taxes		37,057			(11,600	)		72,071			(54,306	)
Reclassification adjustment for realized gains on investment securities included in net earnings, before income tax		(676	)		(67	)		(676	)		(1,288	)
Total other items of comprehensive earnings		36,381			(11,667	)		71,395			(55,594	)
Income tax benefit (expense) related to other items of comprehensive earnings		(7,640	)		2,450			(14,993	)		11,675
Reclassification of certain income tax effects related to the change in the U.S. statutory federal income tax rate under the Tax Cuts and Jobs Act to retained earnings		—			—			—			5,759
COMPREHENSIVE EARNINGS	$	70,834		$	28,416		$	136,747		$	33,992

5

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY

(Dollars in thousands, except per share amounts)

	Common Stock				Capital		Retained			Treasury Stock						Deferred		Accumulated Other Comprehensive			Total Shareholders’
	Shares		Amount		Surplus		Earnings			Shares			Amounts			Compensation		Earnings			Equity
Balances at March 31, 2018		67,612,760	$	676	$	437,868	$	533,427			(493,994	)	$	(7,291	)	$	7,291	$	(2,157	)	$	969,814
Net earnings (unaudited)		—		—		—		37,633			—			—			—		—			37,633
Stock option exercises (unaudited)		46,188		1		963		—			—			—			—		—			964
Restricted stock grant (unaudited)		10,710		—		523		—			—			—			—		—			523
Cash dividends declared, $0.11 per share (unaudited)		—		—		—		(14,466	)		—			—			—		—			(14,466	)
Change in unrealized gain in investment securities available-for-sale, net of related income taxes (unaudited)		—		—		—		—			—			—			—		(9,217	)		(9,217	)
Shares purchased (redeemed) in connection with directors’ deferred compensation plan, net (unaudited)		—		—		—		—			2,824			(128	)		128		—			—
Stock option expense (unaudited)		—		—		377		—			—			—			—		—			377
Reclassification of unrealized gain in equity securities at December 31, 2017 from accumulated other comprehensive earnings to retained earnings (unaudited)		—		—		—		21			—			—			—		(21	)		—
Balances at June 30, 2018 (unaudited)		67,669,658	$	677	$	439,731	$	556,615			(491,170	)	$	(7,419	)	$	7,419	$	(11,395	)	$	985,628
Balances at March 31, 2019		135,680,420	$	1,356	$	445,672	$	629,988			(928,678	)	$	(7,660	)	$	7,660	$	30,506		$	1,107,522
Net earnings (unaudited)		—		—		—		42,093			—			—			—		—			42,093
Stock option exercises (unaudited)		81,272		2		938		—			—			—			—		—			940
Restricted stock grant (unaudited)		47,532		—		1,426		—			—			—			—		—			1,426
Cash dividends declared, $.012 per share (unaudited)		—		—		—		(16,287	)		—			—			—		—			(16,287	)
Change in unrealized gain in investment securities available-for-sale, net of related income taxes (unaudited)		—		—		—		—			—			—			—		28,741			28,741
Shares purchased (redeemed) in connection with directors’ deferred compensation plan, net (unaudited)		—		—		—		—			(763	)		(163	)		163		—			—
Stock option expense (unaudited)		—		—		313		—			—			—			—		—			313
Balances at June 30, 2019 (unaudited)		135,809,224	$	1,358	$	448,349	$	655,794			(929,441	)	$	(7,823	)	$	7,823	$	59,247		$	1,164,748
Balances at December 31, 2017		66,260,444	$	663	$	378,062	$	517,257			(495,964	)	$	(7,148	)	$	7,148	$	26,786		$	922,768
Net earnings (unaudited)		—		—		—		72,152			—			—			—		—			72,152
Stock option exercises (unaudited)		109,133		1		2,318		—			—			—			—		—			2,319
Restricted stock grant (unaudited)		10,710		—		523		—			—			—			—		—			523
Cash dividends declared, $0.20 per share (unaudited)		—		—		—		(27,056	)		—			—			—		—			(27,056	)
Stock issued in acquisition of Commercial Bancshares, Inc.		1,289,371		13		58,074		—			—			—			—		—			58,087
Change in unrealized gain in investment securities available-for-sale, net of related income taxes (unaudited)		—		—		—		—			—			—			—		(43,919	)		(43,919	)
Shares purchased (redeemed) in connection with directors’ deferred compensation plan, net (unaudited)		—		—		—		—			4,794			(271	)		271		—			—
Stock option expense (unaudited)		—		—		754		—			—			—			—		—			754
Reclassification of certain income tax effects related to the change in the U.S. statutory federal income tax rate under the Tax Cuts and Jobs Act to retained earnings		—		—		—		(5,759	)		—			—			—		5,759			—
Reclassification of unrealized gain in equity securities at December 31, 2017 from accumulated other comprehensive earnings to retained earnings (unaudited)		—		—		—		21			—			—			—		(21	)		—
Balances at June 30, 2018 (unaudited)		67,669,658	$	677	$	439,731	$	556,615			(491,170	)	$	(7,419	)	$	7,419	$	(11,395	)	$	985,628
Balances at December 31, 2018		67,753,133	$	678	$	443,114	$	606,658			(467,811	)	$	(7,507	)	$	7,507	$	2,845		$	1,053,295
Net earnings (unaudited)		—		—		—		80,345			—			—			—		—			80,345
Stock option exercises (unaudited)		168,349		2		3,184		—			—			—			—		—			3,186
Restricted stock grant (unaudited)		47,532		—		1,426		—			—			—			—		—			1,426
Cash dividends declared, $.0.23 per share (unaudited)		—		—		—		(30,531	)		—			—			—		—			(30,531	)
Change in unrealized gain in investment securities available-for-sale, net of related income taxes (unaudited)		—		—		—		—			—			—			—		56,402			56,402
Shares purchased (redeemed) in connection with directors’ deferred compensation plan, net (unaudited)		—		—		—		—			2,709			(316	)		316		—			—
Stock option expense (unaudited)		—		—		625		—			—			—			—		—			625
Two-for-one stock split in the form of a 100% stock dividend (unaudited)		67,840,210		678		—		(678	)		(464,339	)		—			—		—			—
Balances at June 30, 2019 (unaudited)		135,809,224	$	1,358	$	448,349	$	655,794			(929,441	)	$	(7,823	)	$	7,823	$	59,247		$	1,164,748

See notes to consolidated financial statements.

6

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS – (UNAUDITED)

(Dollars in thousands)

	Six Months Ended June 30,
	2019			2018
CASH FLOWS FROM OPERATING ACTIVITIES:
Net earnings	$	80,345		$	72,152
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization		5,946			6,433
Provision for loan losses		1,565			2,415
Securities premium amortization (discount accretion), net		12,217			14,109
Gain (loss) on sale of assets, net		824			(1,245	)
Deferred federal income tax expense (benefit)		2,206			(908	)
Change in loans held-for-sale		(631	)		(9,009	)
Change in other assets		1,021			(1,192	)
Change in other liabilities		5,219			6,218
Total adjustments		28,367			16,821
Net cash provided by operating activities		108,712			88,973
CASH FLOWS FROM INVESTING ACTIVITIES:
Cash received in acquisition of Commercial Bancshares, Inc.		—			18,653
Net decrease in interest-bearing time deposits in banks		498			—
Activity in available-for-sale securities:
Sales		66,052			149,125
Maturities		2,201,877			3,208,139
Purchases		(2,280,686	)		(3,471,387	)
Net increase in loans		(88,629	)		(80,480	)
Purchases of bank premises and equipment and other assets		(6,360	)		(8,544	)
Proceeds from sale of bank premises and equipment and other assets		187			776
Net cash used in investing activities		(107,061	)		(183,718	)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase (decrease) in noninterest-bearing deposits		51,445			(97,737	)
Net increase in interest-bearing deposits		137,932			3,481
Net increase (decrease) in borrowings		(106,701	)		125,935
Common stock transactions:
Proceeds from stock issuances		3,186			2,319
Dividends paid		(28,463	)		(25,434	)
Net cash provided by financing activities		57,399			8,564
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS		59,050			(86,181	)
CASH AND CASH EQUIVALENTS, beginning of period		248,647			372,347
CASH AND CASH EQUIVALENTS, end of period	$	307,697		$	286,166
SUPPLEMENTAL INFORMATION AND NONCASH TRANSACTIONS:
Interest paid	$	15,062		$	8,074
Federal income taxes paid		12,752			12,762
Transfer of loans and bank premises to other real estate		364			126
Investment securities purchased but not settled		29,355			—
Restricted stock grant to officers and directors		1,426			523
Stocks issued in acquisition of Commercial Bancshares, Inc.		—			58,087

See notes to consolidated financial statements.

7

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

Note 1 – Basis of Presentation

The unaudited 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 a full-service commercial banking business. Our banking centers are located primarily in Central, North Central, Southeast and West Texas. As of June 30, 2019, we had 73 financial centers across Texas, with eleven locations in Abilene, three locations in Weatherford, two locations in Cleburne, Conroe, San Angelo, Stephenville and Granbury, and one location each in Acton, Albany, Aledo, Alvarado, Beaumont, Boyd, Bridgeport, Brock, Burleson, Cisco, Clyde, Cut and Shoot, Decatur, Eastland, El Campo, Fort Worth, Fulshear, Glen Rose, Grapevine, Hereford, Huntsville, Keller, Kingwood, Magnolia, Mauriceville, Merkel, Midlothian, Mineral Wells, Montgomery, Moran, New Waverly, Newton, Odessa, Orange, Palacios, Port Arthur, Ranger, Rising Star, Roby, Southlake, Spring, Sweetwater, Tomball, Trent, Trophy Club, Vidor, Waxahachie, Willis and Willow Park, all in Texas. Our trust subsidiary has eight locations which are located in Abilene, Fort Worth, Houston, Odessa, Beaumont, San Angelo, Stephenville and Sweetwater.

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, 2018. All adjustments were of a normal recurring nature. However, the results of operations for the three and six months ended June 30, 2019, are not necessarily indicative of the results to be expected for the year ending December 31, 2019, due to seasonality, changes in economic conditions and loan credit quality, interest rate fluctuations, regulatory and legislative changes and other factors. The preparation of financial statements in conformity with United States generally accepted accounting principles (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the financial statement date. Actual results could vary. Certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted under U.S. Securities and Exchange Commission (“SEC”) rules and regulations. The Company evaluated subsequent events for potential recognition and/or disclosure through the date the consolidated financial statements were issued.

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.

Note 2 – Stock Split and Stock Repurchase

On April 23, 2019, the Company’s Board of Directors declared a two-for-one stock split in the form of a 100% stock dividend with a record date of May 15, 2019 that was distributed on June 3, 2019. All per share amounts in this report have been restated to reflect this stock split. An amount equal to the par value of the additional common shares to be issued pursuant to the stock split was reflected as a transfer from retained earnings to common stock in the consolidated financial statements as of and for the three months ended March 31, 2019 and as of and for the six months ended June 30, 2019.

On July 25, 2017, the Company’s Board of Directors authorized the repurchase of up to 2,000,000 common shares through September 30, 2020. The shares buyback plan authorizes management to repurchase the shares at such time as repurchases are considered beneficial to shareholders. Any repurchase of shares 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 June 30, 2019, no shares were repurchased under this authorization.

8

Note 3 – 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 June 30, 2019 and 2018, the Company assumes that all dilutive outstanding options to purchase common shares have been exercised at the beginning of the period (or the time of issuance, if later). The dilutive effect of these outstanding options and the restricted shares is reflected by application of the treasury stock method, whereby the proceeds from exercised options and restricted shares are assumed to be used to purchase common shares 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 June 30, 2019 and 2018 were 135,650,599 and 135,194,550 shares, respectively. The weighted average common shares outstanding used in computing basic earnings per common share for the six months ended June 30, 2019 and 2018 were 135,572,859 and 135,124,672. The weighted average common shares outstanding used in computing fully diluted earnings per common share for the three months ended June 30, 2019 and 2018 were 136,218,235 and 135,848,336 shares, respectively. The weighted average common shares outstanding used in computing fully diluted earnings per common share for the six months ended June 30, 2019 and 2018 were 136,195,811 and 135,735,930. For the three and six months ended June 30, 2019 and 2018, there were no stock options that were anti-dilutive that have been excluded from the EPS calculation.

Note 4 – Interest-bearing Time Deposits in Banks and Securities

Interest-bearing time deposits in banks totaled $960,000, $1,458,000 and $1,458,000 at June 30, 2019 and 2018 and December 31, 2018, respectively, and have original maturities ranging from one to three months.

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. Debt securities not classified as held-to-maturity or trading are classified as available-for-sale and recorded at 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 debt securities that have unrealized gains and losses are excluded from earnings and reported net of tax in accumulated other comprehensive income until realized. Declines in the fair value of available-for-sale debt securities below their cost that are deemed to be other-than-temporary are reflected in earnings as a realized loss if there is no ability or intent to hold to recovery. If the Company does not intend to sell and will not be required to sell prior to recovery of its amortized cost basis, only the credit component of the impairment is reflected in earnings as a realized loss with the noncredit portion recognized in other comprehensive income. In estimating other-than-temporary impairment losses, we consider (1) the length of time and the extent to which the fair value has been less than cost, (2) the financial condition and near-term prospects of the issuer, and (3) our intent and ability to retain our investment in the issuer for a period of time sufficient to allow for any anticipated recovery in fair value. 

Effective January 1, 2018, in accordance with ASU 2016-01 (see note 13), increases or decreases in the fair value of equity securities are recorded in earnings. Prior to January 1, 2018, such increases or decreases were recorded similar to increases or decreases in debt securities.

9

The Company records its available-for-sale and equity securities portfolio at fair value. 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 debt 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 debt securities are analyzed quarterly for possible other-than-temporary impairment. The analysis considers (i) whether we have the intent to sell our debt securities prior to recovery and/or maturity, (ii) whether it is more likely than not that we will have to sell our debt securities prior to recovery and/or maturity, (iii) the length of time and extent to which the fair value has been less than amortized cost, 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 debt 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 U.S. Treasury securities, obligations of state and political subdivisions, 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 value its investment securities, which the Company reviews as well as the underlying pricing methodologies for reasonableness and to ensure such prices are aligned with pricing matrices. The Company validates prices supplied by the independent pricing services by comparison to prices obtained from other third-party sources on a quarterly basis.

A summary of the Company’s available-for-sale securities follows (in thousands):

	June 30, 2019
	Amortized Cost Basis		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses			Estimated Fair Value
U.S. Treasury securities	$	9,984	$	36	$	—		$	10,020
Obligations of states and political subdivisions		1,103,682		53,593		(61	)		1,157,214
Corporate bonds and other		4,643		51		—			4,694
Residential mortgage-backed securities		1,579,544		19,732		(3,101	)		1,596,175
Commercial mortgage-backed securities		484,919		6,929		(459	)		491,389
Total securities available-for-sale	$	3,182,772	$	80,341	$	(3,621	)	$	3,259,492

10

	June 30, 2018
	Amortized Cost Basis		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses			Estimated Fair Value
U.S. Treasury Securities	$	9,957	$	8	$	—		$	9,965
Obligations of U.S. government sponsored enterprises and agencies		304		—		(1	)		303
Obligations of states and political subdivisions		1,257,547		29,924		(2,696	)		1,284,775
Corporate bonds and other		4,861		—		(79	)		4,782
Residential mortgage-backed securities		1,464,345		1,630		(30,718	)		1,435,257
Commercial mortgage-backed securities		471,398		—		(8,913	)		462,485
Total securities available-for-sale	$	3,208,412	$	31,562	$	(42,407	)	$	3,197,567
	December 31, 2018
	Amortized Cost Basis		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses			Estimated Fair Value
U.S. Treasury securities	$	9,970	$	—	$	(8	)	$	9,962
Obligations of U.S. government sponsored enterprises and agencies		301		—		—			301
Obligations of states and political subdivisions		1,229,828		30,013		(1,970	)		1,257,871
Corporate bonds and other		4,875		—		(77	)		4,798
Residential mortgage-backed securities		1,472,228		3,928		(21,611	)		1,454,545
Commercial mortgage-backed securities		436,366		670		(5,736	)		431,300
Total securities available-for-sale	$	3,153,568	$	34,611	$	(29,402	)	$	3,158,777

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 June 30, 2019 were computed by using scheduled amortization of balances and historical prepayment rates. At June 30, 2019 and 2018, and December 31, 2018, the Company did not hold CMOs that entail higher risks than standard mortgage-backed securities.

The amortized cost and estimated fair value of available-for-sale securities at June 30, 2019 by contractual and expected maturity, are shown below (in thousands):

	Amortized Cost Basis		Estimated Fair Value
Due within one year	$	165,912	$	167,217
Due after one year through five years		483,916		506,941
Due after five years through ten years		466,755		495,582
Due after ten years		1,726		2,188
Mortgage-backed securities		2,064,463		2,087,564
Total	$	3,182,772	$	3,259,492

11

The following tables disclose the Company’s investment securities that have been in a continuous unrealized-loss position for less than 12 months and for 12 or more months (in thousands):

	Less than 12 Months				12 Months or Longer				Total
June 30, 2019	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Obligations of states and political subdivisions	$	—	$	—	$	9,777	$	61	$	9,777	$	61
Residential mortgage-backed securities		17,594		77		404,946		3,024		422,540		3,101
Commercial mortgage-backed securities		—		—		134,881		459		134,881		459
Total	$	17,594	$	77	$	549,604	$	3,544	$	567,198	$	3,621
	Less than 12 Months				12 Months or Longer				Total
June 30, 2018	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Obligations of U.S. government sponsored enterprises and agencies	$	303	$	1	$	—	$	—	$	303	$	1
Obligations of states and political subdivisions		136,950		1,122		43,239		1,574		180,189		2,696
Corporate bonds and other		4,617		76		233		3		4,850		79
Residential mortgage-backed securities		1,073,327		21,838		227,155		8,880		1,300,482		30,718
Commercial mortgage-backed securities		379,201		7,477		83,285		1,436		462,486		8,913
Total	$	1,594,398	$	30,514	$	353,912	$	11,893	$	1,948,310	$	42,407
	Less than 12 Months				12 Months or Longer				Total
December 31, 2018	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
U.S. Treasury securities	$	9,962	$	8	$	—	$	—	$	9,962	$	8
Obligations of U.S. government sponsored enterprises and agencies		—		—		301		—		301		—
Obligations of state and political subdivisions		27,489		107		114,461		1,863		141,950		1,970
Corporate bonds and other		4,348		68		450		9		4,798		77
Residential mortgage-backed securities		119,584		483		922,289		21,128		1,041,873		21,611
Commercial mortgage-backed securities		1,994		5		343,015		5,731		345,009		5,736
Total	$	163,377	$	671	$	1,380,516	$	28,731	$	1,543,893	$	29,402

12

The number of investments in an unrealized loss position totaled 109 at June 30, 2019. 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 this 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 June 30, 2019 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. At June 30, 2019, 84.95% of our available-for-sale securities that are obligations of states and political subdivisions were issued within the State of Texas, of which 33.55% are guaranteed by the Texas Permanent School Fund.

At June 30, 2019, $2,137,620,000 of the Company’s securities were pledged as collateral for public or trust fund deposits, repurchase agreements and for other purposes required or permitted by law.

During the three months ended June 30, 2019 and 2018, sales of investment securities that were classified as available-for-sale totaled $65,821,000 and $57,680,000, respectively. Gross realized gains from security sales during the second quarter of 2019 and 2018 totaled $689,000 and $287,000, respectively. Gross realized losses from security sales during second quarter of 2019 and 2018 totaled $13,000 and $220,000, respectively.

During the six months ended June 30, 2019 and 2018, sales of investment securities classified as available-for-sale totaled $66,052,000 and $149,125,000, respectively. Gross realized gains from security sales during the six-month periods ended June 30, 2019 and 2018 totaled $693,000 and $1,529,000, respectively. Gross realized losses from security sales during the six-month periods ended June 30, 2019 and 2018 totaled $17,000 and $241,000, respectively.

The specific identification method was used to determine cost in order to compute the realized gains and losses.

Note 5 – Loans Held for Investment 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 an annual basis and makes changes as appropriate. Management receives and reviews monthly reports related to loan originations, quality, concentrations, delinquencies, nonperforming 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.

13

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 within Texas. 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 for loan losses is an amount which represents management’s best estimate of probable losses that are inherent in the Company’s loan portfolio as of the balance sheet date. The allowance for loan losses is comprised of three elements: (i) specific reserves determined based on probable losses on specific classified loans; (ii) a historical valuation reserve component that considers historical loss rates and estimated loss emergence periods; and (iii) qualitative reserves 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 historical valuation reserve, the loan portfolio, less cash secured loans, government guaranteed loans and classified loans, is multiplied by the Company’s historical loss rate adjusted for the estimated loss emergence period. Specific allocations are increased or decreased in accordance with deterioration or improvement in credit quality and a corresponding increase or decrease 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, oil and gas prices, drought conditions, 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 qualitative reserve serves to estimate for additional areas of losses 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 decline in the economy 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 methodology and could require, in accordance with U.S. GAAP, additional provisions to the allowance for loan losses based on their judgment of information available to them at the time of their examination as well as changes to our methodology.

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.

14

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 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 less cost to sell. Other loan impairments for non-collateral dependent loans are measured based on the present value of expected future cash flows or the loan’s observable market price. At June 30, 2019 and 2018, and December 31, 2018, 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 less cost to sell.

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. For all impaired loans, including the Company’s troubled debt restructurings, the Company performs a periodic, well-documented credit evaluation of the borrower’s financial condition and prospects for repayment to assess the likelihood that all principal and interest payments required under the terms of the agreement will be collected in full. When doubt exists about the ultimate collectability of principal and interest, the troubled debt restructuring remains on non-accrual status and payments received are applied to reduce principal to the extent necessary to eliminate such doubt. This determination of accrual status is judgmental and is based on facts and circumstances related to each troubled debt restructuring. Each of these loans is individually evaluated for impairment and a specific reserve is recorded based on probable losses, taking into consideration the related collateral, modified loan terms and cash flow. As of June 30, 2019 and 2018 and December 31, 2018, substantially all of the Company’s troubled debt restructured loans are included in the non-accrual totals.

Loans acquired, including loans acquired in a business combination, are initially recorded at fair value with no valuation allowance. Acquired loans are segregated between those considered to be credit impaired and those deemed performing. To make this determination, management considers such factors as past due status, non-accrual status and credit risk ratings. The fair value of acquired performing loans is determined by discounting expected cash flows, both principal and interest, at prevailing market interest rates. The difference between the fair value and principal balances at acquisition date, the fair value discount, is accreted into interest income over the estimated life of the acquired portfolio.

Purchased credit impaired loans are those loans that showed evidence of deterioration of credit quality since origination and for which it is probable, at acquisition, that the Company will be unable to collect all amounts contractually owed. Their acquisition fair value, which includes a credit component at the acquisition date, was based on the estimate of cash flows, both principal and interest, expected to be collected or estimated collateral values if cash flows are not estimable, discounted at prevailing market rates of interest. The difference between the discounted cash flows expected at acquisition and the investment in the loan is recognized as interest income on a level-yield method over the life of the loan, unless management was unable to reasonably forecast cash flows in which case the loans were placed on nonaccrual. Subsequent to the acquisition date, increases in expected cash flows will generally result in a recovery of any previously recorded allowance for loan loss, to the extent applicable, and/or a reclassification from the nonaccretable difference to accretable yield, which will be recognized prospectively. Decreases in expected cash flows subsequent to acquisition are recognized as impairment. Valuation allowances on these impaired loans reflect only losses incurred after the acquisition. The carrying amount of purchased credit impaired loans at June 30, 2019 and 2018 and December 31, 2018 were $464,000, $2,813,000 and $827,000, respectively, compared to a contractual balance of $750,000, $3,918,000 and $1,157,000, respectively. Other purchased credit impaired loan disclosures were omitted due to immateriality.

15

Loans held-for-investment by class of financing receivables are as follows (in thousands):

	June 30,				December 31,
	2019		2018		2018
Commercial	$	813,887	$	775,010	$	844,953
Agricultural		97,535		92,583		96,677
Real estate		2,730,585		2,567,878		2,639,346
Consumer		398,945		396,009		372,660
Total loans held-for-investment	$	4,040,952	$	3,831,480	$	3,953,636

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

	June 30,				December 31,
	2019		2018		2018
Non-accrual loans*	$	26,408	$	26,685	$	27,534
Loans still accruing and past due 90 days or more		300		200		1,008
Troubled debt restructured loans**		471		514		513
Total	$	27,179	$	27,399	$	29,055

* Includes $464,000, $2,813,000 and $827,000 of purchased credit impaired loans as of June 30, 2019 and 2018, and December 31, 2018, respectively.

** Troubled debt restructured loans of $3,906,000, $4,329,000 and $3,840,000, whose interest collection, after considering economic and business conditions and collection efforts, is doubtful are included in non-accrual loans at June 30, 2019 and 2018, and December 31, 2018, respectively.

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

June 30, 2019				June 30, 2018				December 31, 2018
Recorded Investment		Valuation Allowance		Recorded Investment		Valuation Allowance		Recorded Investment		Valuation Allowance
	$26,408	$	3,866	$	26,685	$	4,823	$	27,534	$	4,069

16

The Company had $27,860,000, $28,104,000 and $29,632,000 in non-accrual, past due 90 days or more and still accruing, restructured loans and foreclosed assets at June 30, 2019 and 2018, and December 31, 2018, respectively. Non-accrual loans at June 30, 2019 and 2018, and December 31, 2018, consisted of the following by class of financing receivables (in thousands):

	June 30,				December 31,
	2019		2018		2018
Commercial	$	8,189	$	7,580	$	9,334
Agricultural		1,047		1,259		759
Real estate		16,787		16,715		16,714
Consumer		385		1,131		727
Total	$	26,408	$	26,685	$	27,534

No significant additional funds are committed to be advanced in connection with impaired loans as of June 30, 2019.

The Company’s impaired loans and related allowance are summarized in the following tables by class of financing receivables (in thousands). No interest income was recognized on impaired loans subsequent to their classification as impaired.

June 30, 2019	Unpaid Contractual Principal Balance		Recorded Investment With No Allowance*		Recorded Investment With Allowance		Total Recorded Investment		Related Allowance		Year-to-date Average Recorded Investment		Three- Month Average Recorded Investment
Commercial	$	9,340	$	6,212	$	1,977	$	8,189	$	1,022	$	8,699	$	8,562
Agricultural		1,108		434		613		1,047		119		1,090		1,071
Real Estate		24,262		5,034		11,753		16,787		2,515		18,054		17,105
Consumer		525		27		358		385		210		465		427
Total	$	35,235	$	11,707	$	14,701	$	26,408	$	3,866	$	28,308	$	27,165

* Includes $464,000 of purchased credit impaired loans.

June 30, 2018	Unpaid Contractual Principal Balance		Recorded Investment With No Allowance*		Recorded Investment With Allowance		Total Recorded Investment		Related Allowance		Year-to-date Average Recorded Investment		Three- Month Average Recorded Investment
Commercial	$	9,432	$	3,264	$	4,316	$	7,580	$	1,379	$	8,485	$	8,226
Agricultural		1,278		50		1,209		1,259		368		1,670		1,589
Real Estate		22,358		3,569		13,146		16,715		2,645		18,441		18,019
Consumer		1,344		169		962		1,131		431		1,240		1,192
Total	$	34,412	$	7,052	$	19,633	$	26,685	$	4,823	$	29,836	$	29,026

* Includes $2,813,000 of purchased credit impaired loans.

December 31, 2018	Unpaid Contractual Principal Balance		Recorded Investment With No Allowance*		Recorded Investment With Allowance		Total Recorded Investment		Related Allowance		12 Month Average Recorded Investment
Commercial	$	10,808	$	6,728	$	2,606	$	9,334	$	1,133	$	7,986
Agricultural		799		213		546		759		170		842
Real Estate		24,072		6,699		10,015		16,714		2,409		16,042
Consumer		935		101		626		727		357		914
Total	$	36,614	$	13,741	$	13,793	$	27,534	$	4,069	$	25,784

* Includes $827,000 of purchased credit impaired loans.

17

The Company recognized interest income on impaired loans prior to being recognized as impaired of approximately $948,000 during the year ended December 31, 2018. Such amounts for the three-month and six-month periods ended June 30, 2019 and 2018 were not significant.

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

The ratings 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 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.

The following summarizes the Company’s internal ratings of its loans held-for-investment by class of financing receivables and portfolio segments, which are the same (in thousands):

June 30, 2019	Pass		Special Mention		Substandard		Doubtful		Total
Commercial	$	767,275	$	31,124	$	15,488	$	—	$	813,887
Agricultural		94,481		58		2,996		—		97,535
Real Estate		2,656,139		20,044		54,402		—		2,730,585
Consumer		397,017		264		1,664		—		398,945
Total	$	3,914,912	$	51,490	$	74,550	$	—	$	4,040,952
June 30, 2018	Pass		Special Mention		Substandard		Doubtful		Total
Commercial	$	749,387	$	6,439	$	19,184	$	—	$	775,010
Agricultural		87,768		1,568		3,247		—		92,583
Real Estate		2,487,399		26,182		54,297		—		2,567,878
Consumer		393,200		368		2,441		—		396,009
Total	$	3,717,754	$	34,557	$	79,169	$	—	$	3,831,480

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December 31, 2018	Pass		Special Mention		Substandard		Doubtful		Total
Commercial	$	804,584	$	23,392	$	16,977	$	—	$	844,953
Agricultural		92,864		46		3,767		—		96,677
Real Estate		2,559,379		26,626		53,341		—		2,639,346
Consumer		370,510		315		1,835		—		372,660
Total	$	3,827,337	$	50,379	$	75,920	$	—	$	3,953,636

The Company’s past due loans are as follows (in thousands):

June 30, 2019	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	$	2,671	$	352	$	610	$	3,633	$	810,254	$	813,887	$	58
Agricultural		315		163		30		508		97,027		97,535		30
Real Estate		16,130		712		865		17,707		2,712,878		2,730,585		180
Consumer		821		99		40		960		397,985		398,945		32
Total	$	19,937	$	1,326	$	1,545	$	22,808	$	4,018,144	$	4,040,952	$	300
June 30, 2018	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	$	4,950	$	1,085	$	3,029	$	9,064	$	765,946	$	775,010	$	74
Agricultural		626		159		—		785		91,798		92,583		—
Real Estate		13,441		474		532		14,447		2,553,431		2,567,878		70
Consumer		919		232		76		1,227		394,782		396,009		56
Total	$	19,936	$	1,950	$	3,637	$	25,523	$	3,805,957	$	3,831,480	$	200
December 31, 2018	15-59 Days Past Due*		60-89 Days Past Due		Greater Than 90 Days		Total Past Due		Total Current		Total Loans		Total 90 Days  Past Due Still Accruing
Commercial	$	3,546	$	682	$	677	$	4,905	$	840,048	$	844,953	$	—
Agricultural		791		19		26		836		95,841		96,677		—
Real Estate		13,185		881		2,020		16,086		2,623,260		2,639,346		960
Consumer		782		263		54		1,099		371,561		372,660		48
Total	$	18,304	$	1,845	$	2,777	$	22,926	$	3,930,710	$	3,953,636	$	1,008

* 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 following table details the allowance for loan losses by portfolio segment (in thousands). There were no allowances for purchased credit impaired loans at June 30, 2019 and 2018, and December 31, 2018. Allocation of a portion of the allowance to one category of loans does not preclude its availability to absorb losses in other categories.

June 30, 2019	Commercial		Agricultural		Real Estate		Consumer		Total
Loans individually evaluated for impairment	$	1,022	$	119	$	2,515	$	210	$	3,866
Loans collectively evaluated for impairment		12,877		1,241		28,284		5,552		47,954
Total	$	13,899	$	1,360	$	30,799	$	5,762	$	51,820

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June 30, 2018	Commercial		Agricultural		Real Estate		Consumer		Total
Loans individually evaluated for impairment	$	1,379	$	368	$	2,645	$	431	$	4,823
Loans collectively evaluated for impairment		7,839		1,034		30,598		5,657		45,128
Total	$	9,218	$	1,402	$	33,243	$	6,088	$	49,951
December 31, 2018	Commercial		Agricultural		Real Estate		Consumer		Total
Loans individually evaluated for impairment	$	1,133	$	170	$	2,409	$	357	$	4,069
Loans collectively evaluated for impairment		10,815		1,276		29,933		5,109		47,133
Total	$	11,948	$	1,446	$	32,342	$	5,466	$	51,202

Changes in the allowance for loan losses are summarized as follows by portfolio segment (in thousands):

Three months ended June 30, 2019	Commercial			Agricultural			Real Estate			Consumer			Total
Beginning balance	$	12,475		$	1,430		$	31,887		$	5,793		$	51,585
Provision for loan losses		1,418			61			(929	)		50			600
Recoveries		423			5			60			209			697
Charge-offs		(417	)		(136	)		(219	)		(290	)		(1,062	)
Ending balance	$	13,899		$	1,360		$	30,799		$	5,762		$	51,820
Three months ended June 30, 2018	Commercial			Agricultural			Real Estate			Consumer			Total
Beginning balance	$	9,277		$	1,512		$	32,539		$	6,171		$	49,499
Provision for loan losses		335			(115	)		799			86			1,105
Recoveries		126			5			18			147			296
Charge-offs		(520	)		—			(113	)		(316	)		(949	)
Ending balance	$	9,218		$	1,402		$	33,243		$	6,088		$	49,951
Six months ended June 30, 2019	Commercial			Agricultural			Real Estate			Consumer			Total
Beginning balance	$	11,948		$	1,446		$	32,342		$	5,466		$	51,202
Provision for loan losses		1,612			42			(531	)		442			1,565
Recoveries		1,073			7			149			349			1,578
Charge-offs		(734	)		(135	)		(1,161	)		(495	)		(2,525	)
Ending balance	$	13,899		$	1,360		$	30,799		$	5,762		$	51,820
Six months ended June 30, 2018	Commercial			Agricultural			Real Estate			Consumer			Total
Beginning balance	$	10,865		$	1,305		$	29,896		$	6,090		$	48,156
Provision for loan losses		(1,292	)		88			3,233			386			2,415
Recoveries		284			9			260			247			800
Charge-offs		(639	)		—			(146	)		(635	)		(1,420	)
Ending balance	$	9,218		$	1,402		$	33,243		$	6,088		$	49,951

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The Company’s recorded investment in loans related to the balance in the allowance for loan losses on the basis of the Company’s impairment methodology is as follows (in thousands). Purchased credit impaired loans of $464,000, $2,813,000 and $827,000 at June 30, 2019 and 2018, and December 31, 2018, respectively, are included in loans individually evaluated for impairment.

June 30, 2019	Commercial		Agricultural		Real Estate		Consumer		Total
Loans individually evaluated for impairment	$	8,189	$	1,047	$	16,787	$	385	$	26,408
Loans collectively evaluated for impairment		805,698		96,488		2,713,798		398,560		4,014,544
Total	$	813,887	$	97,535	$	2,730,585	$	398,945	$	4,040,952

June 30, 2018	Commercial		Agricultural		Real Estate		Consumer		Total
Loans individually evaluated for impairment	$	7,580	$	1,259	$	16,715	$	1,131	$	26,685
Loans collectively evaluated for impairment		767,430		91,324		2,551,163		394,878		3,804,795
Total	$	775,010	$	92,583	$	2,567,878	$	396,009	$	3,831,480

December 31, 2018	Commercial		Agricultural		Real Estate		Consumer		Total
Loans individually evaluated for impairment	$	9,334	$	759	$	16,714	$	727	$	27,534
Loan collectively evaluated for impairment		835,619		95,918		2,622,632		371,933		3,926,102
Total	$	844,953	$	96,677	$	2,639,346	$	372,660	$	3,953,636

The Company’s loans that were modified and considered troubled debt restructurings are as follows (in thousands):

	Three Months Ended June 30, 2019						Six Months Ended June 30, 2019
	Number		Pre- Modification Recorded Investment		Post- Modification Recorded Investment		Number		Pre- Modification Recorded Investment		Post- Modification Recorded Investment
Commercial		2	$	122	$	122		3	$	279	$	279
Agricultural		2		253		253		10		619		619
Real Estate		—		—		—		4		650		650
Consumer		—		—		—		—		—		—
Total		4	$	375	$	375		17	$	1,548	$	1,548

	Three Months Ended June 30, 2018						Six Months Ended June 30, 2018
	Number		Pre- Modification Recorded Investment		Post- Modification Recorded Investment		Number		Pre- Modification Recorded Investment		Post- Modification Recorded Investment
Commercial		1	$	279	$	279		1	$	279	$	279
Agricultural		—		—		—		1		4		4
Real Estate		2		162		162		4		525		525
Consumer		3		39		39		6		113		113
Total		6	$	480	$	480		12	$	921	$	921

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The balances below provide information as to how the loans were modified as troubled debt restructured loans (in thousands):

	Three Months Ended June 30, 2019						Six Months Ended June 30, 2019
	Adjusted Interest Rate		Extended Maturity		Combined Rate and Maturity		Adjusted Interest Rate		Extended Maturity		Combined Rate and Maturity
Commercial	$	—	$	122	$	—	$	—	$	279	$	—
Agricultural		—		253		—		—		354		265
Real Estate		—		—		—		—		202		448
Consumer		—		—		—		—		—		—
Total	$	—	$	375	$	—	$	—	$	835	$	713

	Three Months Ended June 30, 2018						Six Months Ended June 30, 2018
	Adjusted Interest Rate		Extended Maturity		Combined Rate and Maturity		Adjusted Interest Rate		Extended Maturity		Combined Rate and Maturity
Commercial	$	—	$	—	$	279		—	$	—	$	279
Agricultural		—		—		—		—		—		4
Real Estate		—		162		—		—		162		363
Consumer		—		—		39		—		—		113
Total	$	—	$	162	$	318		—	$	162	$	759

During the three months ended June 30, 2019 and 2018, no loans were modified as a troubled debt restructured loan within the previous 12 months and for which there was a payment default. During the six months ended June 30, 2019 and 2018, no loans were modified as a troubled debt restricted during loan within the previous 12 months and for which there was a payment default. A default for purposes of this disclosure is a troubled debt restructured loan in which the borrower is 90 days past due or more or results in the foreclosure and repossession of the applicable collateral.

As of June 30, 2019, 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 (FHLB) to provide liquidity and meet pledging requirements for those customers eligible to have securities pledged to secure certain uninsured deposits. At June 30, 2019, $2,563,225,000 in loans held by our bank subsidiary were subject to blanket liens as security for this line of credit. At June 30, 2019, there were no advances or letters of credit outstanding under this line of credit.

Note 6 – Loans Held for Sale

The Company originates certain mortgage loans for sale in the secondary market. The mortgage loan sales contracts contain indemnification clauses should the loans default, generally in the first three to nine 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.

Loans held for sale totaled $22,305,000, $24,289,000 and $21,672​​​​​​​,000 at June 30, 2019 and 2018, and December 31, 2018, respectively. At June 30, 2019 and 2018, and December 31, 2018, $3,324,000, $19,228,000 and $2,487,000 are valued at the lower of cost or fair value, and the remaining amounts are valued under the fair value option. The change to the fair value option for loans held for sale was effective at June 30, 2018 and was done in conjunction with the Company’s move to mandatory delivery in the secondary market and the purchase of forward mortgage-backed securities to manage the changes in fair value (see note 7 for additional information).

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These loans, which are sold on a servicing released basis, are valued using a market approach by utilizing either: (i) the fair value of the securities backed by similar mortgage loans, adjusted for certain factors to approximate the fair value of a whole mortgage loan, including the value attributable to mortgage servicing and credit risk, (ii) current commitments to purchase loans or (iii) recent observable market trades for similar loans, adjusted for credit risk and other individual loan characteristics. As these prices are derived from market observable inputs, the Company classifies these valuations as Level 2 in the fair value disclosures (see note 12). Interest income on mortgage loans held for sale is recognized based on the contractual rates and reflected in interest income on loans in the consolidated statements of earnings. The Company has no continuing ownership in any residential mortgage loans sold.

Note 7 – Derivative Financial Instruments

The Company enters into interest rate lock commitments (“IRLCs”) with customers to originate residential mortgage loans at a specific interest rate that are ultimately sold in the secondary market. These commitments, which contain fixed expiration dates, offer the borrower an interest rate guarantee provided the loan meets underwriting guidelines and closes within the timeframe established by the Company.

Beginning in the second quarter of 2018, the Company purchased forward mortgage-backed securities contracts to manage the changes in fair value associated with changes in interest rates related to a portion of the IRLCs. These instruments are typically entered into at the time the IRLC is made.

These financial instruments are not designated as hedging instruments and are used for asset and liability management needs. All derivatives are carried at fair value in either other assets or other liabilities.

The fair values of IRLCs are based on current secondary market prices for underlying loans and estimated servicing value with similar coupons, maturity and credit quality, subject to the anticipated loan funding probability (pull-through rate). The fair value of IRLCs is subject to change primarily due to changes in interest rates and the estimated pull-through rate. These commitments are classified as Level 2 in the fair value disclosures (see note 12), as the valuations are based on observable market inputs.

Forward mortgage-backed securities contracts are exchange-traded or traded within highly active dealer markets. In order to determine the fair value of these instruments, the Company utilizes the exchange price or dealer market price for the particular derivative contract and these instruments are therefore classified as Level 2 in the fair value disclosures (see note 12). The estimated fair values are subject to change primarily due to changes in interest rates.

The following table provides the outstanding notional balances and fair values of outstanding derivative positions (dollars in thousands):

June 30, 2019:	Outstanding Notional Balance		Asset Derivative Fair Value		Liability Derivative Fair Value
IRLCs	$	89,655	$	1,525	$	—
Forward mortgage-backed securities trades		72,500		—		254

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June 30, 2018:	Outstanding Notional Balance		Asset Derivative Fair Value		Liability Derivative Fair Value
IRLCs	$	61,520	$	501	$	—
Forward mortgage-backed securities trades		17,500		—		47

December 31, 2018:	Outstanding Notional Balance		Asset Derivative Fair Value		Liability Derivative Fair Value
IRLCs	$	37,088	$	765	$	—
Forward mortgage-backed securities trades		45,500		—		403

Note 8 – Borrowings

Borrowings consisted of the following (dollars in thousands):

	June 30,				December 31,
	2019		2018		2018
Securities sold under agreements with customers to repurchase	$	356,555	$	389,010	$	409,631
Federal funds purchased		5,450		7,925		4,075
Advances from Federal Home Loan Bank of Dallas		—		60,000		55,000
Total	$	362,005	$	456,935	$	468,706

Securities sold under repurchase agreements are generally with significant customers of the Company that require short-term liquidity for their funds for which the Company pledges certain securities that have a fair value equal to at least the amount of the borrowings. The agreements mature daily and therefore the risk arising from a decline in the fair value of the collateral pledged is minimal. The securities pledged are mortgage-backed securities. These agreements do not include “right of set-off” provisions and therefore the Company does not offset such agreements for financial reporting purposes.

Note 9 – Income Taxes

Income tax expense was $8,594,000 for the second quarter of 2019 as compared to $7,217,000 for the same period in 2018. The Company’s effective tax rates on pretax income were 16.96% and 16.09% for the second quarters of 2019 and 2018, respectively. Income tax expense was $15,959,000 for the six months ended June 30, 2019 as compared to $13,462,000 for the same period in 2018. The Company’s effective tax rates on pretax income were 16.57% and 15.72% for the six months ended June 2019 and 2018, respectively. The effective tax rates differ from the statutory federal tax rate of 21% primarily 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 excess tax benefits related to our directors’ deferred compensation plan.

Note 10 – Stock Option Plan and Restricted Stock Plan

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. On June 26, 2019, the Company granted 398,850 incentive stock options with an exercise price of $29.70 per share. The fair value of the options was $7.31 per option and was estimated using the Black-Scholes options pricing model with the following weighted average assumptions: risk free interest rate of 1.83%; expected dividend yield of 1.62%; expected life of 6.64 years; and expected volatility of 26.69%. No options were granted in 2018.

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The Company recorded stock option expense totaling $313,000 and $377,000 for the three-month periods ended June 30, 2019 and 2018, respectively. The Company recorded stock option expense totaling $625,000 and $754,000 for the six months ended June 30, 2019 and 2018, respectively. The additional disclosure requirements under authoritative accounting guidance have been omitted due to the amounts being insignificant.

On April 25, 2017, upon re-election of existing directors, 29,300 restricted shares with a total value of $600,000 were granted to the ten non-employee directors and were expensed over the period from the grant date to April 24, 2018, the date of the next annual shareholders’ meeting at which these directors’ term expired. On April 24, 2018, upon re-election of nine of the existing directors, 21,420 restricted shares with a total value of $540,000 were granted to these non-employee directors and were expensed over the period from grant date to April 23, 2019, the date of the next annual shareholders’ meeting at which the directors’ term expired. On April 23, 2019, upon re-election of nine of the existing directors and two new directors, 21,714 restricted shares with a total value of $660,000 were granted to these non-employee directors and will be expensed over the period from the grant date to April 28, 2020, the Company’s next annual shareholders’ meeting at which the directors’ term expires. The Company recorded director expense related to these restricted share grants of $135,000 and $140,000 for the three-month periods ended June 30, 2019 and 2018, respectively. The Company recorded director expense related to these restricted stock grants of $270,000 and $290,000 for the six months ended June 30, 2019 and 2018, respectively.

On October 27, 2015, the Company granted 62,546 restricted shares with a total value of $1,060,000 to certain officers that was expensed over the vesting period of three years. On October 25, 2016, the Company granted 30,810 restricted stock shares with a total value of $560,000 to certain officers that is being expensed over the vesting period of three years. On October 24, 2017, the Company granted 28,382 restricted shares with a total value of $655,000 to certain officers that is being expensed over the vesting period of one to three years. On October 23, 2018, the Company granted 52,042 restricted shares with a total value of $1,440,000 to certain officers that will be expensed over a three-year vesting period. On June 26, 2019, the Company granted 25,818 restricted shares with a total value of $766,000 to certain officers that is being expensed over the vesting period of three years. The Company recorded restricted stock expense for officers of $210,000 and $158,000 for the three-month periods ended June 30, 2019 and 2018, respectively. The Company recorded restricted stock expense for officers of $415,000 and $326,000 for the six-month periods ended June 30, 2019 and 2018, respectively.

Note 11 – Pension Plan

The Company’s defined benefit pension plan was frozen effective January 1, 2004, whereby no new participants were added to the plan and no additional years of service were accrued to participants. 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. As a result of its evaluation of its funding status, the Company made no contribution in 2018, and has not made a contribution through June 30, 2019.

In December 2018, due to the rising interest rate environment, the Company determined it was in the best of interest of its shareholders to settle its pension obligation to its retiree group in payout, approximately 53% of the pension benefit obligation on that date, and recorded a loss on settlement totaling $1,546,000 for the year ended December 31, 2018. In 2019, the Company made a decision to terminate and settle the remaining obligation in its pension plan with an effective termination date of June 30, 2019, following which date the Company is obligated to settle the Company’s remaining obligations of the plan upon receipt of regulatory approval. Final settlement of the Company’s remaining obligation under the plan is expected to be made in the fourth quarter of 2019 or first or second quarter of 2020, subject to regulatory approval.

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In addition, the Company had a multiple employer pension plan related to its acquisition of Orange Savings Bank in 2013. This plan was likewise frozen. During the first quarter of 2019, the Company made a decision to remove this plan from the multiple employer plan and merge it into the Company’s existing pension plan. The Company recorded $900,000 in pension merger expense for the three months ended March 31, 2019 in connection with this merger of the Orange pension plan. In May 2019, the Company assumed the Orange pension obligation of $2,740,000 and received related assets totaling $1,829,000.

Net periodic benefit costs totaling $19,000 and $56,000 were recorded for the three months ended June 30, 2019 and 2018, respectively. Net periodic benefit costs totaling $942,000 and $111,000 were recorded for the six months ended June 30, 2019 and 2018, respectively, which includes the Orange pension merger costs discussed above.

Note 12 – 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.

 

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• 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.

See notes 6 and 7 related to the determination of fair value for loans held-for-sale, IRLCs and forward mortgage-backed securities trades.

There were no transfers between Level 1 and Level 2 or Level 2 and Level 3 during the three and six months ended June 30, 2019 and 2018, and the year ended December 31, 2018.

The following table summarizes the Company’s available-for-sale securities which are measured at fair value on a recurring basis, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value (dollars in thousands):

June 30, 2019	Level 1 Inputs		Level 2 Inputs		Level 3 Inputs		Total Fair Value
Available-for-sale investment securities:
U.S. Treasury securities	$	10,020	$	—	$	—	$	10,020
Obligations of states and political subdivisions		—		1,157,214		—		1,157,214
Corporate bonds		—		228		—		228
Residential mortgage-backed securities		—		1,596,175		—		1,596,175
Commercial mortgage-backed securities		—		491,389		—		491,389
Other securities		4,466		—		—		4,466
Total	$	14,486	$	3,245,006	$	—	$	3,259,492
Loans held-for-sale	$	—	$	18,981	$	—	$	18,981
IRLCs	$	—	$	1,525	$	—	$	1,525
Forward mortgage-backed securities trades	$	—	$	254	$	—	$	254

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June 30, 2018	Level 1 Inputs		Level 2 Inputs		Level 3 Inputs		Total Fair Value
Available-for-sale investment securities:
U.S. Treasury securities	$	9,965	$	—	$	—	$	9,965
Obligations of U. S. government sponsored enterprises and agencies		—		303		—		303
Obligations of states and political subdivisions		—		1,284,775		—		1,284,775
Corporate bonds		—		451		—		451
Residential mortgage-backed securities		—		1,435,257		—		1,435,257
Commercial mortgage-backed securities		—		462,485		—		462,485
Other securities		4,331		—		—		4,331
Total	$	14,296	$	3,183,271	$	—	$	3,197,567
Loans held-for-sale	$	—	$	5,061	$	—	$	5,061
IRLCs	$	—	$	501	$	—	$	501
Forward mortgage-backed securities trades	$	—	$	47	$	—	$	47

  

December 31, 2018	Level 1 Inputs		Level 2 Inputs		Level 3 Inputs		Total Fair Value
Available-for-sale investment securities:
U.S. Treasury securities	$	9,962	$	—	$	—	$	9,962
Obligations of U. S. government sponsored enterprises and agencies		—		301		—		301
Obligations of states and political subdivisions		—		1,257,871		—		1,257,871
Corporate bonds		—		450		—		450
Residential mortgage-backed securities		—		1,454,545		—		1,454,545
Commercial mortgage-backed securities		—		431,300		—		431,300
Other securities		4,348		—		—		4,348
Total	$	14,310	$	3,144,467	$	—	$	3,158,777
Loans held-for-sale	$	—	$	19,185	$	—	$	19,185
IRLCs	$	—	$	765	$	—	$	765
Forward mortgage-backed securities trades	$	—	$	403	$	—	$	403

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 June 30, 2019:

Impaired Loans – Impaired loans are reported at the fair value of the underlying collateral less selling costs if repayment is expected solely from the collateral. Collateral values are estimated using Level 2 inputs based on observable market data. At June 30, 2019, impaired loans with a carrying value of $14,701,000 were reduced by specific valuation reserves totaling $3,866,000 resulting in a net fair value of $10,835,000. The Company also had impaired loans of $11,707,000 with no specific valuation reserve at June 30, 2019, due to the loans carrying value generally being lower than the value of the collateral associated with the loan.

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Loans Held-for-Sale – Loans held-for-sale are reported at either the fair value option or the lower of cost or fair value (see notes 6 and 7).

IRLCs and Forward Mortgage-Backed Securities Trades – IRLCs and forward mortgage-backed securities trades are reported at fair value (see note 7).

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 and six months ended June 30, 2019 and 2018 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 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. Re-evaluation 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 June 30,
	2019		2018
Carrying value of other real estate owned prior to re-measurement	$	—	$	526
Write-downs included in gain (loss) on sale of other real estate owned		—		(126	)
Fair value	$	—	$	400
	Six Months Ended June 30,
	2019		2018
Carrying value of other real estate owned prior to re-measurement	$	—	$	526
Write-downs included in gain (loss) on sale of other real estate owned		—		(126	)
Fair value	$	—	$	400

At June 30, 2019 and 2018, and December 31, 2018, other real estate owned totaled $635,000, $642,000 and $448,000, 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. 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.

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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 Levels 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 were as follows (in thousands).

	June 30,								December 31,
	2019				2018				2018
	Carrying Value		Estimated Fair Value		Carrying Value		Estimated Fair Value		Carrying Value		Estimated Fair Value		Fair Value Hierarchy
Cash and due from banks	$	178,345	$	178,345	$	178,217	$	178,217	$	207,835	$	207,835		Level 1
Federal funds sold		700		700		8,450		8,450		—		—		Level 1
Interest-bearing deposits in banks		128,652		128,652		99,499		99,499		40,812		40,812		Level 1
Interest-bearing time deposits in banks		960		960		1,458		1,458		1,458		1,458		Level 2
Available-for-sale securities		3,259,492		3,259,492		3,197,567		3,197,567		3,158,777		3,158,777		Levels 1 and 2
Loans held for investment		3,989,132		4,026,543		3,781,529		3,807,267		3,902,434		3,947,391		Level 3
Loans held for sale		22,305		22,347		24,289		24,550		21,672		21,779		Level 2
Accrued interest receivable		36,954		36,954		36,513		36,513		36,765		36,765		Level 2
Deposits with stated maturities		433,511		433,811		483,230		484,230		442,161		441,727		Level 2
Deposits with no stated maturities		5,936,255		5,936,255		5,727,377		5,727,377		5,738,228		5,738,228		Level 1
Borrowings		362,005		362,005		456,935		456,935		468,706		468,706		Level 2
Accrued interest payable		694		694		223		223		408		408		Level 2
IRLCs		1,525		1,525		501		501		765		765		Level 2
Forward mortgage backed securities trades		254		254		47		47		403		403		Level 2

Note 13 – Recently Issued Authoritative Accounting Guidance

Accounting Standards Update (“ASU”) 2014-09, “Revenue from Contracts with Customers.” ASU 2014-09 implemented a comprehensive new revenue recognition standard that supersedes substantially all existing revenue recognition guidance. The new standard’s core principle is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. To achieve that core principle, an entity applies the following steps: (i) identify the contract(s) with a customer, (ii) identify the performance obligations in the contract, (iii) determine the transaction price, (iv) allocate the transaction price to the performance obligations in the contract and (v) recognize revenue when (or as) the entity satisfies a performance obligation. ASU 2015-4 “Revenue from Contracts with Customers – Deferral of the Effective Date” deferred the effective date of ASU 2014-09 by one year and as a result, the new standard became effective in the first quarter of 2018. The Company’s revenue is comprised of net interest income on financial assets and financial liabilities, which is explicitly excluded from the scope of ASU 2014-09, and non-interest income. The adoption of the new standard in the first quarter of 2018 did not have a significant impact on the Company’s financial statements and no adjustment to opening retained earnings was recorded.

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ASU 2016-01, ASU 2016-01 “Financial Instruments – Overall: Recognition and Measurement of Financial Assets and Financial Liabilities.” ASU 2016-01, among other things, (i) requires equity investments, with certain exceptions, to be measured at fair value with changes in fair value recognized in net income, (ii) simplified the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment, (iii) eliminated the requirement for public business entities to disclose the methods and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet, (iv) required public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes, (v) required an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments, (vi) required separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balance sheet or the accompanying notes to the financial statements and (vii) clarified that an entity should evaluate the need for a valuation allowance on a deferred tax asset related to available-for-sale securities. ASU 2016-1 became effective for the Company on January 1, 2018 and did not have a significant impact on the Company’s financial statements.

ASU 2016-02, “Leases.” ASU 2016-02 amended current lease accounting to require lessees to recognize (i) a lease liability, which is a lessee’s obligation to make lease payments arising from a lease, measured on a discounted basis, and (ii) a right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term. ASU 2016-02 does not significantly change lease accounting requirements applicable to lessors; however, certain changes were made to align, where necessary, lessor accounting with the lessee accounting model. The amended guidance became effective in the first quarter of 2019 and required transition using a modified retrospective approach for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. The Company evaluated the provisions of the new lease standard and, due to the small dollar amounts and number of lease agreements, the effect for the Company on January 1, 2019 was not significant.

ASU 2016-13, “Financial Instruments – Credit Losses.” ASU 2016-13 implements a comprehensive change in estimating the allowances for loan losses from the current model of losses inherent in the loan portfolio to a current expected credit loss model that generally is expected to result in earlier recognition of allowances for losses. ASU 2016-13 requires the measurement of all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts and requires enhanced disclosures related to the significant estimates and judgments used in estimating credit losses, as well as the credit quality and underwriting standards of an organization’s portfolio. In addition, ASU 2016-13 amends the accounting for credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. ASU 2016-13 will be effective for the Company as of January 1, 2020. The Company has formed a working group comprised of individuals from various functional areas including credit, risk management, finance and information technology, among others to assist in the implementation of ASU 2016-13. The Company is currently working through our implementation plan that includes assessment of processes, portfolio segmentation, data validation, model development and internal controls. Additionally, the Company is working with a third-party vendor to assist with implementation and model development. The Company continues to evaluate the potential impact of ASU 2016-13 on the Company’s financial statements, but expect that the impact of adoption will be significantly influenced by the composition, characteristics and quality of our loan and securities portfolios as well as the prevailing economic conditions and forecasts as of the adoption date.

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ASU 2017-04, “Intangibles – Goodwill and Other.” ASU 2017-04 will amend and simplify current goodwill impairment testing to eliminate Step 2 from the current provisions. Under the new guidance, an entity should perform the goodwill impairment test by comparing the fair value of a reporting unit with its carrying value and recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value. An entity still has the option to perform the qualitative assessment for a reporting unit to determine if a quantitative impairment test is necessary. ASU 2017-04 will be effective for the Company on January 1, 2020 and is not expected to have a significant impact on the Company’s financial statements.

ASU 2018-02, “Income Statement – Reporting Comprehensive Income: Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income.” ASU 2018-02 was issued to address the income tax accounting treatment of the stranded tax effects within other comprehensive income due to the prohibition of backward tracing due to an income tax rate change that was initially recorded in other comprehensive income. This issue came about from the enactment of the Tax Cuts and Jobs Act on December 22, 2017 that changed the Company’s income tax rate from 35% to 21%. The ASU changed current accounting whereby an entity may elect to reclassify the stranded tax effect from accumulated other comprehensive income to retained earnings. The ASU was effective for periods beginning after December 15, 2018 although early adoption was permitted. The Company early adopted ASU 2018-02 in the first quarter of 2018 and reclassified its stranded tax debit of $5,759,000 within accumulated other comprehensive income to retained earnings.

ASU 2018-13, “Fair Value Measurement – Changes to the Disclosure Requirements for Fair Value Measurement” eliminates the requirements to disclose the amount and reason for transfers between Level 1 and Level 2 fair value methodology, the policy for the timing of transfers between levels and the valuation process for Level 3 fair value measurements. ASU 2018-13 requires an entity to disclose relevant quantitative information used to develop Level 3 fair value measurements. ASU 2018-13 will become effective for the Company on January 1, 2020 and is not expected to have a significant impact on the Company’s financial statements.

Note 14 – Acquisition

On October 12, 2017, we entered into an agreement and plan of reorganization to acquire Commercial Bancshares, Inc. and its wholly owned bank subsidiary, Commercial State Bank, Kingwood, Texas. On January 1, 2018, the transaction was completed. Pursuant to the agreement, we issued 1,289,371 shares of the Company’s common stock in exchange for all of the outstanding shares of Commercial Bancshares, Inc. In addition, Commercial Bancshares, Inc. made a $22,075,000 special dividend to its shareholders prior to closing of the transaction, which was increased for the amount by which Commercial Bancshares, Inc.’s consolidated shareholders’ equity as of January 1, 2018 exceeded $42,402,000, after certain adjustments per the merger agreement.

At closing, Commercial Bancshares, Inc. was merged into the Company and Commercial State Bank, Kingwood, Texas, was merged into First Financial Bank, National Association, Abilene, Texas, a wholly owned subsidiary of the Company. The primary purpose of the acquisition was to expand the Company’s market share around Houston. Factors that contributed to a purchase price resulting in goodwill include Commercial State Bank’s record of earnings, strong management and board of directors, strong local economic environment and opportunity for growth. The results of operations from this acquisition are included in the consolidated earnings of the Company commencing January 1, 2018.

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The following table presents the amounts recorded on the consolidated balance sheet on the acquisition date (dollars in thousands):

Fair value of consideration paid:
Common stock issued (1,289,371 shares)	$	58,087
Fair value of identifiable assets acquired:
Cash and cash equivalents		18,653
Securities available-for-sale		64,501
Loans		266,327
Identifiable intangible assets		3,167
Other assets		15,375
Total identifiable assets acquired		368,023
Fair value of liabilities assumed:
Deposits		341,902
Other liabilities		(373	)
Total liabilities assumed		341,529
Fair value of net identifiable assets acquired		26,494
Goodwill resulting from acquisition	$	31,593

Goodwill recorded in the acquisition was accounted for in accordance with the authoritative business combination guidance. Accordingly, goodwill will not be amortized but will be tested for impairment annually. The goodwill recorded is not deductible for federal income tax purposes.

The fair value of total loans acquired was $266,327,000 at acquisition compared to contractual amounts of $271,714,000. The fair value of purchased credit impaired loans at acquisition was $3,013,000 compared to contractual amounts of $3,806,000. Additional purchased credit impaired loan disclosures were omitted due to immateriality. All other acquired loans were considered performing loans.

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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 our 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 local, state, national and international, and the impact they may have on us and our customers;

• effect of severe weather conditions, including hurricanes, tornadoes, flooding and droughts;

• volatility and disruption in national and international financial and commodity 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, the capital ratios of Basel III as adopted by the federal banking authorities and the Tax Cuts and Jobs Act;

• political instability;

• the ability of the Federal government to address the national economy;

• changes in our competitive environment from other financial institutions and financial service providers;

• 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 (the “Federal Reserve Board”);

• the effect of changes in accounting policies and practices, as may be adopted by the regulatory agencies, as well as the Public Company Accounting Oversight Board, the Financial Accounting Standards Board and other accounting standard setters;

• the effect of changes in laws and regulations (including laws and regulations concerning taxes, banking, securities and insurance) with which we and our subsidiaries must comply;

• 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;

• potential risk of environmental liability associated with lending activities;

• 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;

• changes in commodity prices (e.g., oil and gas, cattle and wind energy);

• our ability to attract deposits and increase market share;

• changes in our liquidity position;

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

• cyber attacks on our technology information systems, including fraud from our customers and external third party vendors;

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• 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;

• greater than expected costs or difficulties related to expansion of operations, including branch openings, new product offerings and expansion into new markets;

• changes in our organization, compensation and benefit plans;

• acts of God or of war or terrorism; and

• our success at managing the risk involved in the foregoing items.

Such forward-looking 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 (except as required by law).

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, First Financial Bank, National Association, Abilene, Texas. Our largest expense is 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 and analysis 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 2018 Annual Report on Form 10-K.

Critical Accounting Policies

We prepare consolidated financial statements based on GAAP 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 5 and note 4, respectively, to our notes to consolidated financial statements (unaudited) which begins on page 8.

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Stock Split

On April 23, 2019, the Company’s Board of Directors declared a two-for-one stock split in the form of a 100% stock dividend with a record date of May 15, 2019 that was distributed on June 3, 2019. All per share amounts in this report have been restated to reflect this stock split. An amount equal to the par value of the additional common shares to be issued pursuant to the stock split was reflected as a transfer from retained earnings to common shares in the consolidated financial statements as of and for the three months ended March 31, 2019 and as of and for the six months ended June 30, 2019.

Acquisition

On October 12, 2017, we entered into an agreement and plan of reorganization to acquire Commercial Bancshares, Inc. and its wholly owned bank subsidiary, Commercial State Bank, Kingwood, Texas. On January 1, 2018, the transaction closed. Pursuant to the agreement, we issued 1,289,371 shares of the Company’s common stock in exchange for all of the outstanding shares of Commercial Bancshares, Inc. In addition, in accordance with the plan of reorganization, Commercial Bancshares, Inc. paid a special dividend totaling $22.08 million to its shareholders prior to the closing of this transaction. At the closing, Kingwood Merger Sub., Inc., a wholly-owned subsidiary of the Company, merged into Commercial Bancshares Inc., with Commercial Bancshares, Inc. surviving as a wholly-owned subsidiary of the Company. Immediately following such merger, Commercial Bancshares, Inc. was merged into the Company and Commercial State Bank, Kingwood, Texas was merged into First Financial Bank, National Association, Abilene, Texas, a wholly owned subsidiary of the Company. The total purchase price exceeded the estimated fair value net of assets acquired by approximately $31.59 million and the Company recorded such excess as goodwill. The balance sheet and results of operations of Commercial Bancshares, Inc. have been included in the financial statements of the Company effective January 1, 2018. See note 14 to the consolidated financial statements on page 33 for additional information and disclosure.

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Results of Operations

Performance Summary. Net earnings for the second quarter of 2019 were $42.09 million, up $4.46 million when compared with earnings of $37.63 million in the same quarter last year. Basic earnings per share were $0.31 for the second quarter of 2019 compared with $0.28 in the same quarter a year ago.

The return on average assets was 2.14% for the second quarter of 2019, as compared to 1.98% for the second quarter of 2018. The return on average equity was 15.04% for the second quarter of 2019 as compared to 15.53% for the second quarter of 2018.

Net earnings for the six-month period ended June 30, 2019 were $80.35 million compared to $72.15 million for the same period in 2018. Basic earnings per share for the first six months of 2019 were $0.59 compared to $0.53 for the same period in 2018.

The return on average assets was 2.08% for the first six months of 2019, as compared to 1.91% for the same period a year ago. The return on average equity was 14.78% for the second quarter of 2019 as compared to 15.14% for the second quarter of 2018.

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 $73.28 million for the second quarter of 2019, as compared to $69.90 million for the same period last year. The increase in 2019 compared to 2018 was largely attributable to the increase in interest earning assets. Average earning assets increased $240.61 million for the second quarter of 2019 over the same period in 2018. Average loans and taxable securities increased $245.71 million and $55.55 million, respectively, for the second quarter of 2019 over the same quarter of 2018. Average tax-exempt securities decreased $111.87 million for the second quarter of 2019 compared to the same period in 2018, primarily due to the Company’s gradual shift away from tax-exempt securities due to the change in corporate tax rate to 21% from 35%. Average interest-bearing liabilities increased $63.75 million for the second quarter of 2019, as compared to the same period in 2018. The yield on earning assets increased 24 basis points while the rate paid on interest-bearing liabilities increased 30 basis points for the second quarter of 2019 compared to the second quarter of 2018.

Tax-equivalent net interest income was $144.61 million for the first six months of 2019, as compared to $137.82 million for the same period last year. The increase in 2019 compared to 2018 was largely attributable to the increase in interest earning assets. Average earning assets increased $188.49 million for the first six months of 2019 over the same period in 2018. Average loans and tax-exempt securities increased $235.19 million and $76.89 million, respectively, for the first six months of 2019 over the first six months of 2018. Average tax-exempt securities decreased $118.79 million for the first six months of 2019 compared to the same period in 2018, primarily due to the Company’s gradual shift away from tax-exempt securities due to the change in corporate tax rate to 21% from 35%. Average interest-bearing liabilities increased $59.89 million for the first six months of 2019, as compared to the same period in 2018. The yield on earning assets increased 28 basis points while the rate paid on interest-bearing liabilities increased 32 basis points for the first six months of 2019 compared to the first six months of 2018.

38

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 June 30, 2019 Compared to Three Months Ended June 30, 2018									Six Months Ended June 30, 2019 Compared to Six Months Ended June 30, 2018
	Change Attributable to						Total			Change Attributable to						Total
	Volume			Rate			Change			Volume			Rate			Change
Short-term investments	$	228		$	168		$	396		$	(37	)	$	411		$	374
Taxable investment securities		352			854			1,206			965			2,175			3,140
Tax-exempt investment securities (1)		(1,047	)		(339	)		(1,386	)		(2,215	)		(452	)		(2,667	)
Loans (1) (2)		3,194			3,463			6,657			6,006			7,193			13,199
Interest income		2,727			4,146			6,873			4,719			9,327			14,046
Interest-bearing deposits		118			3,163			3,281			114			6,309			6,423
Short-term borrowings		(59	)		272			213			(4	)		829			825
Interest expense		59			3,435			3,494			110			7,138			7,248
Net interest income	$	2,668		$	711		$	3,379		$	4,609		$	2,189		$	6,798

(1) Computed on a tax-equivalent basis assuming a marginal tax rate of 21%.

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

The net interest margin for the second quarter of 2019 was 3.98%, an increase of six basis points from the same period in 2018. The net interest margin for the first six months of 2019 was 3.99%, an increase of nine basis points from the same period in 2018. We continue to experience downward pressures on our net interest margin in 2019 and 2018 primarily due to (i) the change in the income tax rate from 35% to 21% from the Tax Cuts and Jobs Act and its effect on our tax free municipal bonds and tax free loans and (ii) the result of the extended period of historically low levels of short-term interest rates, although rates did increase somewhat in the past 30 months. We have been able to somewhat mitigate the impact of lower short-term interest rates by establishing minimum interest rates on certain of our loans, improving the pricing for loan risk, and minimizing rates paid on interest bearing liabilities. As rates began to increase, we adjusted loan rates upon maturities and converted when possible to variable rates. We also increased rates paid on our interest-bearing deposits. The Federal Reserve increased rates 100 basis points in 2018, 75 basis points in 2017 and 25 basis points in 2016 and 2015, however recent forward guidance from the Federal Reserve indicated no increases in 2019 and have discussed rate cuts in the second half of 2019.

39

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 June 30,
	2019								2018
	Average Balance			Income/ Expense		Yield/ Rate			Average Balance			Income/ Expense		Yield/ Rate
Assets
Short-term investments (1)	$	112,817		$	667		2.37	%	$	61,601		$	271		1.76	%
Taxable investment securities (2)		2,063,497			13,925		2.70			2,007,949			12,719		2.53
Tax-exempt investment securities (2)(3)		1,169,889			10,615		3.63			1,281,757			12,001		3.75
Loans (3)(4)		4,043,055			56,033		5.56			3,797,341			49,376		5.22
Total earning assets		7,389,258		$	81,240		4.41	%		7,148,648		$	74,367		4.17	%
Cash and due from banks		167,764								168,535
Bank premises and equipment, net		134,280								128,370
Other assets		63,629								64,490
Goodwill and other intangible assets, net		174,263								175,401
Allowance for loan losses		(52,005	)							(49,959	)
Total assets	$	7,877,189							$	7,635,485
Liabilities and Shareholders’ Equity
Interest-bearing deposits	$	4,196,123		$	7,286		0.70	%	$	4,076,522		$	4,005		0.39	%
Short-term borrowings		378,389			675		0.72			434,239			462		0.43
Total interest-bearing liabilities		4,574,512		$	7,961		0.70	%		4,510,761		$	4,467		0.40	%
Noninterest-bearing deposits		2,136,264								2,121,902
Other liabilities		44,097								30,549
Total liabilities		6,754,873								6,663,212
Shareholders’ equity		1,122,316								972,273
Total liabilities and shareholders’ equity	$	7,877,189							$	7,635,485
Net interest income				$	73,279							$	69,900
Rate Analysis:
Interest income/earning assets							4.41	%							4.17	%
Interest expense/earning assets							(0.43	)							(0.25	)
Net interest margin							3.98	%							3.92	%

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	Six Months Ended June 30,
	2019								2018
	Average Balance			Income/ Expense		Yield/ Rate			Average Balance			Income/ Expense		Yield/ Rate
Assets
Short-term investments (1)	$	109,005		$	1,286		2.38	%	$	113,817		$	911		1.61	%
Taxable investment securities (2)		1,994,563			27,213		2.73			1,917,671			24,073		2.51
Tax-exempt investment securities (2)(3)		1,198,016			21,893		3.65			1,316,801			24,560		3.73
Loans (3)(4)		4,008,275			109,569		5.51			3,773,085			96,371		5.15
Total earning assets		7,309,859		$	159,961		4.41	%		7,121,374		$	145,915		4.13	%
Cash and due from banks		177,601								180,083
Bank premises and equipment, net		134,239								127,829
Other assets		64,004								61,353
Goodwill and other intangible assets, net		174,396								169,884
Allowance for loan losses		(52,146	)							(49,793	)
Total assets	$	7,807,953							$	7,610,730
Liabilities and Shareholders’ Equity
Interest-bearing deposits	$	4,170,250		$	13,947		0.67	%	$	4,107,750		$	7,524		0.37	%
Short-term borrowings		393,432			1,401		0.72			396,039			576		0.29
Total interest-bearing liabilities		4,563,682		$	15,348		0.68	%		4,503,789		$	8,100		0.36	%
Noninterest-bearing deposits		2,109,640								2,116,969
Other liabilities		38,758								28,750
Total liabilities		6,712,080								6,649,508
Shareholders’ equity		1,095,873								961,222
Total liabilities and shareholders’ equity	$	7,807,953							$	7,610,730
Net interest income				$	144,613							$	137,815
Rate Analysis:
Interest income/earning assets							4.41	%							4.13	%
Interest expense/earning assets							(0.42	)							(0.23	)
Net interest margin							3.99	%							3.90	%

(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 21%.

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

Noninterest Income. Noninterest income for the second quarter of 2019 increased to $27.98 million compared to $25.49 million in same period in 2018. Trust fees decreased slightly to $7.03 million in the second quarter of 2019 compared with $7.07 million in the same quarter last year. We have experienced continued growth in the fair value of trust assets managed to $6.19 billion from $5.40 billion a year ago but our revenue from oil and gas management decreased by $319 thousand due to decreased volumes in oil and gas production. Real estate mortgage fees increased in the second quarter of 2019 to $4.72 million from $3.95 million in the same quarter a year ago due to an increase in the value of loans originated and additional income from the change to mandatory delivery related to sales in the secondary mortgage market (see notes 6 and 7 to the consolidated financial statements (unaudited) on pages 22 to 24). ATM, interchange and credit card fees increased 4.42% to $7.35 million compared with $7.04 million in the same quarter last year due to continued growth in debit cards. Additionally, interest on loan recoveries totaled $903 thousand for the second quarter of 2019 compared to $289 thousand for the same period in 2018 due to the collection of a larger loan that had previously been on nonaccrual and gains on the sale of securities totaled $676 thousand compared to $67 thousand in the same quarter in 2018.

Noninterest income for the six-month period ended June 30, 2019 was $52.41 million, an increase of $2.50 million compared to the same period in 2018. Trust fees increased slightly to $14.01 million in the first six months of 2019 compared with $13.98 million in the same period in 2018. We have experienced continued growth in the fair value of trust assets managed to $6.19 billion from $5.40 billion a year ago but our revenue from oil and gas management decreased by $323 thousand due to decreased volumes in oil and gas production. Service charges on deposits increased 2.84% to $10.55 million compared with $10.26 million in the same period last year primarily due to the continued growth in net new accounts. Real estate mortgage fees increased in the first six months of 2019 to $8.20 million compared to $6.88 million in the same period a year ago due to an increase in the value of loans originated and additional income from the change to mandatory delivery related to sales in the secondary mortgage market (see notes 6 and 7 to the consolidated financial statements (unaudited) on pages 22 to 24). ATM, interchange and credit card fees increased 1.10% to $14.19 million compared with $14.04 million in the same period last year due to continued growth in debit cards. Additionally, interest on loan recoveries totaled $1.24 million for the first six months of 2019 compared to $408 thousand in the same period in 2018 due to the collection of a larger loan that had previously been on nonaccrual. Offsetting these increases was a decrease in gains on the sale of securities which totaled $676 thousand for the first six months of 2019 compared to $1.29 million in the same period a year ago.

41

ATM and interchange fees are charges that merchants pay to us and other card-issuing banks for processing electronic payment transactions. ATM and interchange fees consist of income from debit card usage, point of sale income for debit card transactions and ATM service fees. Federal Reserve rules applicable to financial institutions that have assets of $10 billion or more provide that the maximum permissible interchange fee for an electronic debit transaction is the sum of 21 cents per transaction and 5 basis points multiplied by the value of the transaction. While we currently have assets under $10 billion, we are monitoring the effect of this reduction in per transaction fee income as we approach the $10 billion asset level.

Table 3 – Noninterest Income (in thousands):

	Three Months Ended June 30,							Six Months Ended June 30,
	2019		Increase (Decrease)			2018		2019		Increase (Decrease)			2018
Trust fees	$	7,027	$	(43	)	$	7,070	$	14,006	$	31		$	13,975
Service charges on deposit accounts		5,374		(1	)		5,375		10,550		291			10,259
ATM, interchange and credit card fees		7,352		311			7,041		14,192		155			14,037
Real estate mortgage operations		4,721		770			3,951		8,195		1,311			6,884
Net gain on sale of available-for-sale securities		676		609			67		676		(612	)		1,288
Net gain (loss) on sale of foreclosed assets		53		34			19		122		4			118
Net gain (loss) on sale of assets		6		6			—		6		97			(91	)
Interest on loan recoveries		903		614			289		1,241		833			408
Other:
Check printing fees		48		(6	)		54		89		(7	)		96
Safe deposit rental fees		119		(3	)		122		313		(12	)		325
Credit life fees		420		29			391		614		126			488
Brokerage commissions		417		(27	)		444		763		(100	)		863
Miscellaneous income		860		195			665		1,646		384			1,262
Total other		1,864		188			1,676		3,425		391			3,034
Total Noninterest Income	$	27,976	$	2,488		$	25,488	$	52,413	$	2,501		$	49,912

Noninterest Expense. Total noninterest expense for the second quarter of 2019 was $48.30 million, an increase of $1.16 million compared to $47.15 million in the same period of 2018. An important measure in determining whether a financial institution effectively manages noninterest expense 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 second quarter of 2019 was 47.71% compared to 49.42% for the same quarter in 2018.

Salaries and employee benefits for the second quarter of 2019 totaled $27.39 million, an increase of $532 thousand compared to the same period in 2018. The increase was primarily driven by annual merit-based pay increases that were effective March 1, 2019. All other categories of noninterest expense for the second quarter of 2019 totaled $20.91 million, up from $20.28 million in the same quarter a year ago.

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Total noninterest expense for the first six months of 2019 was $95.67 million, an increase of $730 thousand when compared to $94.94 million in the same period in 2018. Our efficiency ratio for the first six months of 2019 was 48.56%, compared to 50.57% from the same period in 2018.

Salaries and employee benefits for the first six months of 2019 totaled $54.82 million, an increase of $1.75 million when compared to the same period in 2018. The increase was primarily driven by annual pay increases that were effective March 1, 2019 and the recognition of $900 thousand in pension expense resulting from the Company’s continued efforts to terminate its frozen defined benefits pension plan.

All other categories of noninterest expense for the first six months of 2019 totaled $40.86 million, a decrease of $1.02 million when compared to the same period in 2018. Included in noninterest expense in the first six months period of 2018 were technology contract termination and conversion related costs totaling $1.55 million related to the Commercial State Bank acquisition.

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Table 4 – Noninterest Expense (in thousands):

	Three Months Ended June 30,							Six Months Ended June 30,
	2019		Increase (Decrease)			2018		2019		Increase (Decrease)			2018
Salaries	$	20,567	$	733		$	19,834	$	40,244	$	685		$	39,559
Medical		2,288		197			2,091		4,783		271			4,512
Profit sharing		1,884		(434	)		2,318		3,375		(151	)		3,526
Pension		19		(37	)		56		42		(69	)		111
401(k) match expense		701		33			668		1,425		81			1,344
Payroll taxes		1,412		52			1,360		3,009		76			2,933
Stock option and stock grant expense		523		(12	)		535		1,040		(40	)		1,080
Total salaries and employee benefits		27,394		532			26,862		53,918		853			53,065
Loss from partial settlement of pension plan		—		—			—		900		900			—
Net occupancy expense		2,779		(27	)		2,806		5,542		(147	)		5,689
Equipment expense		2,827		(613	)		3,440		5,954		(1,003	)		6,957
FDIC assessment fees		538		(94	)		632		1,076		(123	)		1,199
ATM, interchange and credit card expense		2,427		222			2,205		4,810		462			4,348
Professional and service fees		1,987		(39	)		2,026		3,820		(619	)		4,439
Printing, stationery and supplies		502		(110	)		612		868		(230	)		1,098
Operational and other losses		480		175			305		746		(125	)		871
Software amortization and expense		1,287		808			479		2,210		1,207			1,003
Amortization of intangible assets		264		(120	)		384		532		(239	)		771
Other:
Data processing fees		352		(109	)		461		767		175			592
Postage		406		(1	)		407		841		1			840
Advertising		878		5			873		1,762		23			1,739
Correspondent bank service charges		176		(32	)		208		347		(51	)		398
Telephone		963		67			896		1,923		86			1,837
Public relations and business development		752		49			703		1,516		104			1,412
Directors’ fees		488		56			432		945		55			890
Audit and accounting fees		484		14			470		926		12			914
Legal fees		286		35			251		583		(30	)		613
Regulatory exam fees		291		(16	)		307		582		(50	)		632
Travel		536		162			374		875		110			765
Courier expense		190		(15	)		205		390		(35	)		425
Other real estate owned		62		16			46		72		(14	)		86
Other miscellaneous expense		1,955		195			1,760		3,768		(592	)		4,360
Total other		7,819		426			7,393		15,297		(206	)		15,503
Total Noninterest Expense	$	48,304	$	1,160		$	47,144	$	95,673	$	730		$	94,943

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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 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 June 30, 2019, total loans held for investment were $4.04 billion, an increase of $87.32 million, as compared to December 31, 2018 balances. As compared to December 31, 2018, commercial loans decreased $31.07 million, agricultural loans increased $858 thousand, real estate loans increased $91.24 million and consumer loans increased $26.29 million. Loans averaged $4.04 billion during the second quarter of 2019, an increase of $245.71 million from the prior year second quarter average balances. Loans averaged $4.01 billion during the first six months of 2019, an increase of $235.19 million from the prior year six-month period average balances.

Table 5 – Composition of Loans (in thousands):

	June 30,				December 31, 2018
	2019		2018
Commercial	$	813,887	$	775,010	$	844,953
Agricultural		97,535		92,583		96,677
Real estate		2,730,585		2,567,878		2,639,346
Consumer		398,945		396,009		372,660
Total loans held-for-investment	$	4,040,952	$	3,831,480	$	3,953,636

At June 30, 2019, our real estate loans represent approximately 67.57% of our loan portfolio and are comprised of (i) 1-4 family residence loans of 42.04%, (ii) commercial real estate loans of 29.17%, generally owner occupied, (iii) other loans, which includes ranches, hospitals and universities, of 13.12%, (iv) residential development and construction loans of 10.03%, which includes our custom and speculative home construction loans and (v) commercial development and construction loans of 5.64%.

Loans held for sale, consisting of secondary market mortgage loans, totaled $22.31 million, $24.29 million, and $21.67 million at June 30, 2019 and 2018, and December 31, 2018, respectively. At June 30, 2019 and 2018 and December 31, 2018, $3.32 million, $19.23 million and $2.49 million, respectively, are valued using the lower of cost or fair value method and the remaining amounts are valued under the fair value option method. See notes 6 and 7 to the consolidated financial statements (unaudited) related to the change to mandatory delivery for sales in the secondary mortgage market on pages 22 through 24.

Asset Quality. Our loan portfolio is subject to periodic reviews by our centralized independent loan review group as well as periodic examinations by 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 or more and still accruing, and restructured loans plus foreclosed assets were $27.86 million at June 30, 2019, as compared to $28.10 million at June 30, 2018 and $29.63 million at December 31, 2018. As a percent of loans and foreclosed assets, these assets were 0.69% at June 30, 2019, as compared to 0.73% at June 30, 2018 and 0.75% at December 31, 2018. As a percent of total assets, these assets were 0.35% at June 30, 2019, as compared to 0.37% at June 30, 2018 and 0.38% at December 31, 2018. We believe the level of these assets to be manageable and are not aware of any material classified credits not properly disclosed as nonperforming at June 30, 2019.

45

Supplemental Oil and Gas Information. As of June 30, 2019, the Company’s exposure to the oil and gas industry totaled 2.64% of gross loans, or $107.10 million, down $6.44 million from December 31, 2018 year-end levels, and consisted (based on collateral supporting the loan) of (i) development and production loans of 0.28%, (ii) oil and gas field servicing loans of 12.18%, (iii) real estate loans of 44.22%, (iv) accounts receivable and inventory of 3.33%, (v) automobile of 34.77% and (vi) other of 5.22%. The following oil and gas information is as of and for the quarters ended June 30, 2019 and 2018, and December 31, 2018:

	June 30,						December 31, 2018
	2019			2018
Oil and gas related loans	$	107,097		$	103,381		$	113,536
Oil and gas related loans as a % of total loans		2.64	%		2.68	%		2.86	%
Classified oil and gas related loans	$	3,438		$	5,001		$	3,894
Non-accrual oil and gas related loans	$	621		$	1,629		$	1,048
Net charge-offs for oil and gas related loans for quarter/year then ended	$	—		$	—		$	—
Allowance for oil and gas related loans as a % of oil and gas loans		2.95	%		3.48	%		3.23	%

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

	June 30,						December 31, 2018
	2019			2018
Non-accrual loans*	$	26,408		$	26,685		$	27,534
Loans still accruing and past due 90 days or more		300			200			1,008
Troubled debt restructured loans**		471			514			513
Nonperforming Loans		27,179			27,399			29,055
Foreclosed assets		681			705			577
Total nonperforming assets	$	27,860		$	28,104		$	29,632
As a % of loans and foreclosed assets		0.69	%		0.73	%		0.75	%
As a % of total assets		0.35	%		0.37	%		0.38	%

* Includes $464 thousand, $2.81 million and $827 thousand of purchased credit impaired loans as of June 30, 2019 and 2018, and December 31, 2018, respectively.

** Other troubled debt restructured loans of $3.91 million, $4.33 million and $3.84 million, whose interest collection, after considering economic and business conditions and collection efforts, is doubtful are included in non-accrual loans at June 30, 2019 and 2018, and December 31, 2018, respectively.

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 of approximately $395 thousand for the year ended December 31, 2018. If interest on these impaired loans had been recognized on a full accrual basis during the year ended December 31, 2018, such income would have approximated $2.57 million. Such amounts for the 2019 and 2018 interim periods were not significant.

46

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 5 to our notes to the consolidated financial statements (unaudited). The provision for loan losses was $600 thousand for the second quarter of 2019, as compared to $1.11 million for the second quarter of 2018. The provision for loan losses was $1.57 million for the six-month period ended June 30, 2019 as compared to $2.42 million for the same period in 2018. The continued provision for loan losses in 2019 and 2018 reflects primarily the growth in the loan portfolio. As a percent of average loans, net loan charge-offs were 0.04% for the second quarter of 2019, as compared to 0.07% for the second quarter of 2018. As a percentage of average loans, net loan charge-offs were 0.05% for the first six months of 2019, as compared to 0.03% for the first six months of 2018. The allowance for loan losses as a percent of loans was 1.28% as of June 30, 2019, as compared to 1.30% as of June 30, 2018 and 1.29% as of December 31, 2018. Included in Table 7 is further analysis of our allowance for loan losses.

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

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Allowance for loan losses at period-end	$	51,820		$	49,951		$	51,820		$	49,951
Loans held for investment at period-end		4,040,952			3,831,480			4,040,952			3,831,480
Average loans for period		4,043,055			3,797,341			4,008,275			3,773,085
Net charge-offs/average loans (annualized)		0.04	%		0.07	%		0.05	%		0.03	%
Allowance for loan losses/period-end loans		1.28	%		1.30	%		1.28	%		1.30	%
Allowance for loan losses/non-accrual loans, past due 90 days still accruing and restructured loans		190.66	%		182.31	%		190.66	%		182.31	%

Interest-Bearing Deposits in Banks. At June 30, 2019, our interest-bearing deposits in banks were $129.61 million compared to $100.96 million at June 30, 2018 and $42.27 million at December 31, 2018, respectively. At June 30, 2019, interest-bearing deposits in banks included $960 thousand invested in FDIC-insured certificates of deposit, $128.13 million maintained at the Federal Reserve Bank of Dallas and $525 thousand on deposit with the Federal Home Loan Bank of Dallas (“FHLB”).

Available-for-Sale and Held-to-Maturity Securities. At June 30, 2019, securities with a fair value of $3.26 billion were classified as securities available-for-sale. As compared to December 31, 2018, the available-for-sale portfolio at June 30, 2019 reflected (i) an increase in U.S. Treasury securities of $58 thousand, (ii) a decrease of $301 thousand in obligations of U.S. government sponsored enterprises and agencies, (iii) a decrease of $100.66 million in obligations of states and political subdivisions, (iv) a decrease of $104 thousand in corporate bonds and other, and (v) an increase of $201.72 million in mortgage-backed securities. The shift to mortgage-backed securities from obligations of state and political subdivisions was due to the change in the federal income tax rate of 21% from 35% effective January 1, 2018. Our mortgage related securities are backed by GNMA, FNMA or FHLMC or are collateralized by securities backed by these agencies.

See note 4 to the consolidated financial statements (unaudited) for additional disclosures relating to the investment portfolio at June 30, 2019 and 2018, and December 31, 2018.

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Table 8 – Maturities and Yields of Available-for-Sale Securities Held at June 30, 2019 (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	$	10,020		2.52	%	$	—		—	%	$	—		—	%	$	—		—	%	$	10,020		2.52	%
Obligations of states and political subdivisions		152,730		4.73			506,714		4.35			495,582		3.98			2,188		5.66			1,157,214		4.24
Corporate bonds and other securities		4,467		2.44			227		2.65			—		—			—		—			4,694		2.45
Mortgage-backed securities		27,992		2.14			1,337,484		2.62			722,088		2.98			—		—			2,087,564		2.74
Total	$	195,209		4.19	%	$	1,844,425		3.09	%	$	1,217,670		3.39	%	$	2,188		5.66	%	$	3,259,492		3.27	%

All yields are computed on a tax-equivalent basis assuming a marginal tax rate of 21%. Yields on available-for-sale 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 earlier of maturity date or call date.

As of June 30, 2019, the investment portfolio had an overall tax equivalent yield of 3.27%, a weighted average life of 4.14 years and modified duration of 3.70 years.

Deposits. Deposits held by our subsidiary bank represent our primary source of funding. Total deposits were $6.37 billion as of June 30, 2019, as compared to $6.21 billion as of June 30, 2018 and $6.18 billion as of December 31, 2018. Table 9 provides a breakdown of average deposits and rates paid for the three-month and six-month periods ended June 30, 2019 and 2018, respectively.

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

	Three Months Ended June 30,
	2019					2018
	Average Balance		Average Rate			Average Balance		Average Rate
Noninterest-bearing deposits	$	2,136,264		—	%	$	2,121,902		—	%
Interest-bearing deposits:
Interest-bearing checking		2,054,770		0.77			2,059,587		0.54
Savings and money market accounts		1,705,154		0.56			1,536,899		0.23
Time deposits under $100,000		188,188		0.69			207,518		0.19
Time deposits of $100,000 or more		248,011		1.04			272,518		0.40
Total interest-bearing deposits		4,196,123		0.70	%		4,076,522		0.39	%
Total average deposits	$	6,332,387				$	6,198,424

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	Six Months Ended June 30,
	2019					2018
	Average Balance		Average Rate			Average Balance		Average Rate
Noninterest-bearing deposits	$	2,109,640		—	%	$	2,116,969		—	%
Interest-bearing deposits:
Interest-bearing checking		2,056,068		0.74			2,093,746		0.50
Savings and money market accounts		1,675,909		0.56			1,534,025		0.21
Time deposits under $100,000		189,921		0.62			211,319		0.19
Time deposits of $100,000 or more		248,352		0.94			268,660		0.38
Total interest-bearing deposits		4,170,250		0.67	%		4,107,750		0.37	%
Total average deposits	$	6,279,890				$	6,224,719

Borrowings. Included in borrowings were federal funds purchased, securities sold under repurchase agreements and advances from the FHLB of $362.01 million, $456.94 million and $468.71 million at June 30, 2019 and 2018 and December 31, 2018, respectively. Securities sold under repurchase agreements are generally with significant customers of the Company that require short-term liquidity for their funds for which we pledge certain securities that have a fair value equal to at least the amount of the borrowings. The average balance of federal funds purchased, securities sold under repurchase agreements and advances from the FHLB were $378.39 million and $434.24 million in the second quarter of 2019 and 2018, respectively. The weighted average interest rates paid on these borrowings were 0.72% and 0.43% for the second quarters of 2019 and 2018, respectively. The average balances of federal funds purchased, securities sold under repurchase agreements and advances from the FHLB was $393.43 million and $396.04 million for the six-month periods ended June 30, 2019 and 2018, respectively. The weighted average interest rate on these short-term borrowings was 0.72% and 0.29% for the first six months of 2019 and 2018, 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 $1.16 billion, or 14.60% of total assets at June 30, 2019, as compared to $985.63 million or 12.82% of total assets at June 30, 2018 and $1.05 billion, or 13.62% of total assets at December 31, 2018. Included in shareholders’ equity at June 30, 2019 and 2018 and December 31, 2018, were $60.57 million, ($8.52) million and $4.17 million, respectively, in unrealized gains (losses) on investment securities available-for-sale, net of related income taxes. For the second quarter of 2019, total shareholders’ equity averaged $1.12 billion, or 14.25% of average assets, as compared to $972.27 million, or 12.73% of average assets, during the same period in 2018. For the six months ended June 30, 2019, total shareholders’ equity averaged $1.10 billion or 14.04%, as compared to $961.22 million or 12.63% of total assets during the same period in 2018.

Banking regulators measure capital adequacy by means of the risk-based capital ratios and the leverage ratio under the Basel III regulatory capital framework and prompt corrective action regulations. The risk-based capital rules provide for the weighting of assets and off-balance-sheet commitments and contingencies according to prescribed risk categories. 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.

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Beginning in January 2016, under the Basel III regulatory capital framework, the implementation of the capital conservation buffer was effective for the Company starting at the 0.625% level and increasing 0.625% each year thereafter, until it reached 2.50% on January 1, 2019. The capital conservation buffer is designed to absorb losses during periods of economic stress and requires increased capital levels for the purpose of capital distributions and other payments. Failure to meet the amount of the buffer will result in restrictions on the Company’s ability to make capital distributions, including dividend payments and stock repurchases, and to pay discretionary bonuses to executive officers.

As of June 30, 2019 and 2018, and December 31, 2018, we had a total capital to risk-weighted assets ratio of 21.16%, 19.81% and 20.61%, a Tier 1 capital to risk-weighted assets ratio of 20.04%, 18.68% and 19.47%; a common equity Tier 1 to risk-weighted assets ratio of 20.04%, 18.68% and 19.47% and a leverage ratio of 12.29%, 11.14% and 11.85%, respectively. The regulatory capital ratios as of June 30, 2019 and 2018, and December 31, 2018 were calculated under Basel III rules. There is no threshold for well-capitalized status for bank holding companies.

The regulatory capital ratios of the Company and Bank under the Basel III regulatory capital framework are as follows:

	Actual					Minimum Capital Required-Basel III Fully Phased-In*					Required to be Considered Well- Capitalized
As of June 30, 2019:	Amount		Ratio			Amount		Ratio			Amount		Ratio
Total Capital to Risk-Weighted Assets:
Consolidated	$	995,299		21.16	%	$	493,803		10.50	%		—		N/A
First Financial Bank, N.A	$	901,188		19.21	%	$	492,484		10.50	%	$	469,032		10.00	%
Tier 1 Capital to Risk-Weighted Assets:
Consolidated	$	942,670		20.04	%	$	399,745		8.50	%		—		N/A
First Financial Bank, N.A	$	848,560		18.09	%	$	398,677		8.50	%	$	375,226		8.00	%
Common Equity Tier 1 Capital to Risk-Weighted Assets:
Consolidated	$	942,670		20.04	%	$	329,202		7.00	%		—		N/A
First Financial Bank, N.A	$	848,560		18.09	%	$	328,323		7.00	%	$	304,871		6.50	%
Leverage Ratio:
Consolidated	$	942,760		12.29	%	$	306,707		4.00	%		—		N/A
First Financial Bank, N.A	$	848,560		11.11	%	$	305,515		4.00	%	$	381,893		5.00	%

* At June 30, 2019, the capital conservation buffer under Basel III has been fully phased-in.

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	Actual					Minimum Capital Required Under Basel III Phase-In					Minimum Capital Required-Basel III Fully Phased-In					Required to be Considered Well- Capitalized
As of June 30, 2018:	Amount		Ratio			Amount		Ratio			Amount		Ratio			Amount		Ratio
Total Capital to Risk-Weighted Assets:
Consolidated	$	884,279		19.81	%	$	440,691		9.875	%	$	468,583		10.50	%		—		N/A
First Financial Bank, N.A	$	813,002		18.27	%	$	439,561		9.875	%	$	467,349		10.50	%	$	445,095		10.00	%
Tier 1 Capital to Risk-Weighted Assets:
Consolidated	$	833,669		18.68	%	$	351,437		7.875	%	$	379,329		8.50	%		—		N/A
First Financial Bank, N.A	$	762,393		17.13	%	$	350,512		7.875	%	$	378,330		8.50	%	$	356,076		8.00	%
Common Equity Tier 1 Capital to Risk-Weighted Assets:
Consolidated	$	833,669		18.68	%	$	284,497		6.375	%	$	312,389		7.00	%		—		N/A
First Financial Bank, N.A	$	762,393		17.13	%	$	283,748		6.375	%	$	311,566		7.00	%	$	289,311		6.50	%
Leverage Ratio:
Consolidated	$	833,669		11.14	%	$	299,364		4.00	%	$	299,364		4.00	%		—		N/A
First Financial Bank, N.A	$	762,393		10.23	%	$	298,235		4.00	%	$	298,235		4.00	%	$	372,794		5.00	%

	Actual					Minimum Capital Required Under Basel III Phase-In					Minimum Capital Required-Basel III Fully Phased-In					Required to be Considered Well- Capitalized
As of December 31, 2018:	Amount		Ratio			Amount		Ratio			Amount		Ratio			Amount		Ratio
Total Capital to Risk-Weighted Assets:
Consolidated	$	940,026		20.61	%	$	450,459		9.875	%	$	478,969		10.50	%		—		N/A
First Financial Bank, N.A	$	824,428		18.12	%	$	449,350		9.875	%	$	477,790		10.50	%	$	455,038		10.00	%
Tier 1 Capital to Risk-Weighted Assets:
Consolidated	$	888,015		19.47	%	$	359,226		7.875	%	$	387,737		8.50	%		—		N/A
First Financial Bank, N.A	$	772,417		16.97	%	$	358,342		7.875	%	$	386,782		8.50	%	$	364,030		8.00	%
Common Equity Tier 1 Capital to Risk-Weighted Assets:
Consolidated	$	888,015		19.47	%	$	290,802		6.375	%	$	319,312		7.00	%		—		N/A
First Financial Bank, N.A	$	772,417		16.97	%	$	290,087		6.375	%	$	318,526		7.00	%	$	295,775		6.50	%
Leverage Ratio:
Consolidated	$	888,015		11.85	%	$	299,682		4.00	%	$	299,682		4.00	%		—		N/A
First Financial Bank, N.A	$	772,417		10.35	%	$	298,576		4.00	%	$	298,576		4.00	%	$	373,220		5.00	%

In connection with the adoption of the Basel III regulatory capital framework, our subsidiary bank made the election to continue to exclude most accumulated other comprehensive income (“AOCI”) from capital in connection with its quarterly financial filing and, in effect, to retain the AOCI treatment under the prior capital rules.

Interest Rate Risk

Interest rate risk results when the maturity or repricing 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 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.

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As of June 30, 2019, the model simulations projected that 100 and 200 basis point increases in interest rates would result in positive variances in net interest income of 2.97% and 5.12%, respectively, relative to the current financial statement structure over the next twelve months, while a decrease in interest rates of 100 and 200 basis points would result in a negative variance in net interest income of 3.09% and 7.31%, respectively, relative to the current financial statement structure over the next twelve months. We consider the likelihood of a decrease in interest rates beyond 100 basis points as of June 30, 2019 remote despite the Federal Reserve’s comments suggesting that rates may be cut during the second half of 2019. Our model simulation as of June 30, 2019 indicates that our balance sheet is relatively asset/liability neutral. 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 on 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 repricing 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.

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 bank. Other sources of funds include our ability to borrow from short-term sources, such as purchasing federal funds from correspondent banks, sales of securities under agreements to repurchase and advances from the FHLB (see below) and an unfunded $25.00 million revolving line of credit established with Frost Bank, a nonaffiliated bank, which matures in June 2019 (see next paragraph). Our subsidiary bank also has federal funds purchased lines of credit with two non-affiliated banks totaling $130.00 million. At June 30, 2019, no amounts were drawn on these lines of credit. Our subsidiary bank also has available a line of credit with the FHLB totaling $1.23 billion at June 30, 2019, secured by portions of our loan portfolio and certain investment securities. At June 30, 2019, the Company had no advances or letters of credit outstanding under this line of credit.

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The Company renewed its loan agreement, effective June 30, 2019, with Frost Bank. Under the loan agreement, as renewed and amended, we are permitted to draw up to $25.00 million on a revolving line of credit. Prior to June 30, 2021, interest is paid quarterly at The Wall Street Journal Prime Rate and the line of credit matures June 30, 2021. If a balance exists at June 30, 2021, the principal balance converts to a term facility payable quarterly over five years and interest is paid quarterly at The Wall Street Journal Prime Rate. 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 ratios. 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. The Company was in compliance with the financial and operational covenants at June 30, 2019. There was no outstanding balance under the line of credit as of June 30, 2019 or December 31, 2018.

In addition, we anticipate that future acquisitions of financial institutions, expansion of branch locations or offerings of new products could also place a demand on our cash resources. Available cash and cash equivalents at our parent company which totaled $77.85 million at June 30, 2019, investment securities which totaled $6.35 million at June 30, 2019 and mature over 9 to 12 years, available dividends from our subsidiaries which totaled $253.40 million at June 30, 2019, 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.

Our liquidity position is continuously monitored and adjustments are made to the balance between sources and uses of funds as deemed appropriate. Liquidity risk management is an important element in our asset/liability management process. We regularly model liquidity stress scenarios to assess potential liquidity outflows or funding problems resulting from economic disruptions, volatility in the financial markets, unexpected credit events or other significant occurrences deemed potentially problematic by management. These scenarios are incorporated into our contingency funding plan, which provides the basis for the identification of our liquidity needs. As of June 30, 2019, management is not aware of any events that are reasonably likely to have a material adverse effect on our liquidity, capital resources or operations. Given the strong core deposit base and relatively low loan to deposit ratios maintained at our subsidiary bank, we consider our current liquidity position to be adequate to meet our short-term and long-term liquidity needs. In addition, management is not aware of any regulatory recommendations regarding liquidity that would have a material adverse effect on us.

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 to correspondent banks 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.

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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 June 30, 2019 (in thousands):

	Total Notional Amounts Committed
Unfunded lines of credit	$	695,824
Unfunded commitments to extend credit		367,270
Standby letters of credit		32,148
Total commercial commitments	$	1,095,242

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, 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 intercompany dividends 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 June 30, 2019, approximately $253.40 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 $4.00 million and $3.80 million for the six-month periods ended June 30, 2019 and 2018, respectively.

Dividends. Our long-term dividend policy is to pay cash dividends to our shareholders of approximately 40% of annual net earnings while maintaining adequate capital to support growth. We are also restricted by a loan covenant within our line of credit agreement with Frost Bank to dividend no greater than 55% of net income, as defined in such loan agreement. The cash dividend payout ratios have amounted to 38.00% and 37.50% of net earnings for the first six months of 2019 and 2018, respectively. Given our current capital position and projected earnings and asset growth rates, we do not anticipate any significant change in our current dividend policy. On April 23, 2019 the Board of Directors declared a $0.12 per share cash dividend (post stock split) for the second quarter of 2019, a 14.3% increase over 2018.

Our bank subsidiary, which is a national banking association and a member of the Federal Reserve System, is required by federal law to obtain the prior approval of 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.

To pay dividends, we and our subsidiary bank must maintain adequate capital above regulatory guidelines. In addition, if the applicable regulatory authority believes that a bank 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 bank, 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.

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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 June 30, 2019, 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 (as defined in Rule 13a-15(e) or 15d-15(e) 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, and 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 control. 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 become inadequate because of changes in conditions or the degree of compliance with the 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 were effective at the reasonable assurance level as of June 30, 2019.

Subsequent to our evaluation, there were no significant changes in internal controls over financial reporting or other factors that have materially affected, or are reasonably likely to materially affect, these internal controls.

55

PART II

OTHER INFORMATION

Item 1. Legal Proceedings

From time to time we and our subsidiaries 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 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 2018 Annual Report on 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

56

Item 6. Exhibits

2.1	—	Agreement and Plan of Reorganization, dated October 12, 2017, by and among First Financial Bankshares, Inc., Kingwood Merger Sub, Inc., and Commercial Bancshares, Inc. (schedules have been omitted pursuant to Item 601(b)(2) of Regulation S-K) (incorporated by reference from Exhibit 2.1 to Registrant’s Form 8-K filed October 12, 2017).
3.1	—	Amended and Restated Certificate of Formation.*
3.2	—	Amended and Restated Bylaws of the Registrant (incorporated by reference from Exhibit 99.1 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	—	2002 Incentive Stock Option Plan (incorporated by reference from Exhibit 10.3 of the Registrant’s Form 10-Q filed May 4, 2010).++
10.2	—	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).++
10.3	—	Loan agreement dated June 30, 2013, between First Financial Bankshares, Inc. and Frost Bank (incorporated by reference from Exhibit 10.1 of the Registrant’s Form 8-K filed July 1, 2013).
10.4	—	First Amendment to Loan Agreement, dated June 30, 2015, between First Financial Bankshares, Inc. and Frost Bank (incorporated by reference from Exhibit 10.1 of the Registrant’s Form 8-K filed June 30, 2015).
10.5	—	Second Amendment to Loan Agreement, dated June 30, 2017, between First Financial Bankshares, Inc. and Frost Bank (incorporated by reference from Exhibit 10.1 of the Registrant’s Form 8-K filed June 30, 2017).
10.6	—	Third Amendment to Loan Agreement, dated June 30, 2019, between First Financial Bankshares, Inc. and Frost Bank (incorporated by reference from Exhibit 10.1 of the Registrant’s Form 8-K filed July 1, 2019).
10.7	—	2015 Restricted Stock 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 2, 2015).++
10.8	—	Form of Executive Recognition Agreement (incorporated by reference from Exhibit 10.1 of the Registrant’s Form 8-K filed June 29, 2018).++
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.+
101.INS	—	XBRL Instance Document — the instance document does not appear in the Interactive Data File becaus​​​​​​​e its XBRL tags are embedded within the Inline XBRL document.*
101.SCH	—	XBRL Taxonomy Extension Schema Document.*
101.CAL	—	XBRL Taxonomy Extension Calculation Linkbase Document.*
101.DEF	—	XBRL Taxonomy Extension Definition Linkbase Document.*
101.LAB	—	XBRL Taxonomy Extension Label Linkbase Document.*
101.PRE	—	XBRL Taxonomy Extension Presentation Linkbase Document.*

* Filed herewith

+ Furnished herewith. This Exhibit shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, or otherwise subject to the liability of that section, and shall not be deemed to be incorporated into any filing under the Securities Act of 1933 or the Securities Exchange Act of 1934.

++ Management contract or compensatory plan on arrangement.

57

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: July 30, 2019	By:	/s/ F. Scott Dueser
		F. Scott Dueser
		President and Chief Executive Officer
Date: July 30, 2019	By:	/s/ J. Bruce Hildebrand
		J. Bruce Hildebrand
		Executive Vice President and
		Chief Financial Officer

58

EX-3.1

Exhibit 3.1

AMENDED AND RESTATED CERTIFICATE OF FORMATION

OF

FIRST FINANCIAL BANKSHARES, INC.

FIRST

First Financial Bankshares, Inc. (the “Corporation”), pursuant to the provisions of Section 3.059 of the Texas Business Organizations Code, hereby adopts this Amended and Restated Certificate of Formation, which accurately copies the Certificate of Formation and all amendments thereto that are in effect to date. The prior Certificate of Formation, as restated and amended by this Amended and Restated Certificate of Formation, is set forth below and contains no other changes in any provisions. For purposes of this document, the prior Certificate of Formation, including all amendments thereto, will be referred to as the Certificate of Formation.

SECOND

The shareholders of the Corporation adopted the following amendments to the Certificate of Formation on the 23rd day of April, 2019:

1.    ARTICLE FOUR of the Certificate of Formation is amended to read as follows:

“The aggregate number of common shares which the corporation shall have authority to issue is TWO HUNDRED MILLION (200,000,000) of the par value of ONE CENT ($0.01) each.”

2.    ARTICLE SIX of the Certificate of Formation is amended to read as follows:

“The number of Directors constituting the current Board of Directors is twelve (12), and the names and addresses of the persons who are currently serving as Directors until the next annual meeting of the shareholders or until their successors are elected and qualified are:

Name	Address
April Anthony	6688 N. Central Expressway, Ste. 1300, Dallas, TX 75206
Tucker S. Bridwell	P. O. Box 1616, Abilene, TX 79604
David Copeland	273 Walnut St., Abilene, TX 79601
F. Scott Dueser	P. O. Box 701, Abilene, TX 79604
Murray Edwards	5423 FM 3217, Clyde, TX 79510
Tim Lancaster	4202 78th Street #2, Lubbock, TX 79423
Ronald Giddiens	5808 Pecan Valley, San Angelo, TX 76904
Kade L. Matthews	P. O. Box 1170, Clarendon, TX 79226
Ross H. Smith, Jr.	P. O. Box 1508, Orange, TX 77631
Johnny Trotter	3409 FM 1058, Hereford, TX 79045
Robert Nickles, Jr.	1300 Alegacy Place, Waller, TX 77484
Mike Denny	2825 Pine Street, Abilene, TX 79605”

1

THIRD

Each statement made in this Amended and Restated Certificate of Formation has been effected in conformity with the Texas Business Organizations Code. This Amended and Restated Certificate of Formation and all amendments made by this Amended and Restated Certificate of Formation were adopted by the shareholders of the Corporation on April 23, 2019, and in accordance with the Texas Business Organizations Code and the governing documents of the Corporation.

FOURTH

The Certificate of Formation and all amendments and supplements thereto are superseded by the following Amended and Restated Certificate of Formation, which accurately copies the entire text of the Certificate of Formation as well as incorporates the amendment set forth above:

2

AMENDED AND RESTATED CERTIFICATE OF FORMATION

OF

FIRST FINANCIAL BANKSHARES, INC.

ARTICLE ONE

The name of the corporation is FIRST FINANCIAL BANKSHARES, INC.

ARTICLE TWO

The corporation is formed as a domestic for-profit corporation.

ARTICLE THREE

The purposes for which the corporation is organized are the transaction of any or all lawful business for which corporations may be incorporated under the Texas Business Organizations Code.

ARTICLE FOUR

The aggregate number of common shares which the corporation shall have authority to issue is TWO HUNDRED MILLION (200,000,000) of the par value of ONE CENT ($0.01) each.

ARTICLE FIVE

The address of its registered office is 400 Pine Street, Abilene, Texas, USA 79601, and the name of its registered agent at such address is F. Scott Dueser.

ARTICLE SIX

The number of Directors constituting the current Board of Directors is twelve (12), and the names and addresses of the persons who are currently serving as Directors until the next annual meeting of the shareholders or until their successors are elected and qualified are:

Name	Address
April Anthony	6688 N. Central Expressway, Ste. 1300, Dallas, TX 75206
Tucker S. Bridwell	P. O. Box 1616, Abilene, TX 79604
David Copeland	273 Walnut St., Abilene, TX 79601
F. Scott Dueser	P. O. Box 701, Abilene, TX 79604
Murray Edwards	5423 FM 3217, Clyde, TX 79510
Tim Lancaster	4202 78th Street #2, Lubbock, TX 79423
Ronald Giddiens	5808 Pecan Valley, San Angelo, TX 76904
Kade L. Matthews	P. O. Box 1170, Clarendon, TX 79226
Ross H. Smith, Jr.	P. O. Box 1508, Orange, TX 77631
Johnny Trotter	3409 FM 1058, Hereford, TX 79045
Robert Nickles, Jr.	1300 Alegacy Place, Waller, TX 77484
Mike Denny	2825 Pine Street, Abilene, TX 79605

3

ARTICLE SEVEN

The right of every shareholder to cumulatively vote shares is denied.

ARTICLE EIGHT

The preemptive rights of every shareholder to acquire unissued or treasury shares of the corporation is denied.

ARTICLE NINE

To the fullest extent not prohibited by applicable laws as presently or hereafter in effect, no person shall be liable to the corporation or its shareholders for monetary damages for or with respect to any acts or omissions in his or her capacity as a Director of the corporation, except liability for (i) a breach of a Director’s duty of loyalty to the corporation or its shareholders, (ii) an act or omission not in good faith or that involves intentional misconduct or a knowing violation of the law, (iii) a transaction from which a Director received an improper benefit, whether or not the benefit resulted from an action taken within the scope of the Director’s office, (iv) an act or omission for which the liability of a Director is expressly provided by statute, or (v) an act related to an unlawful stock repurchase or payment of a dividend.

Each person, his or her heirs, executors, personal representatives and estate, shall be indemnified by the corporation for all expenses incurred in connection with any action, suit, proceeding or claim to which he or she shall be named a party or otherwise be a participant by virtue of being or having been or agreeing to become (i) a Director, officer, employee or agent of the corporation and/or (ii) a Director, officer, employee or agent of any corporation or organization at the request of the corporation. Such indemnity shall be provided to the fullest extent not prohibited by applicable laws presently in effect or as may hereafter be amended. Indemnity shall include, but not be limited to the advancement of expenses and payment of all loss, liability and expenses. Provided, however, that no person shall be indemnified for amounts paid in settlement unless the terms and conditions of said settlement have been consented to by the corporation. Further, no indemnification of employees or agents of the corporation (other than Directors and officers) will be made without express authorization of the corporation’s Board of Directors.

The corporation may, upon the affirmative vote of the majority of its Board of Directors, purchase insurance for the purpose of securing the indemnification of its Directors, officers and other employees to the extent that such indemnification is allowed in this Article. Such insurance may, but need not, be for the benefit of all Directors, officers or employees, and the purchase of any such insurance shall in no way limit the indemnification provisions of the preceding paragraph. Provided, however, that such insurance shall not include coverage for a formal order assessing civil money penalties against a Director or employee of the corporation arising out of an administrative proceeding or action by an appropriate bank regulatory agency.

4

No repeal of or amendment to this Article Nine shall have any effect with respect to the liability or alleged liability of any Director occurring prior to such amendment or to the acts or omissions or rights to indemnity of any person occurring prior to such repeal or amendment.

The term “Director” in this Article Nine shall include Advisory Directors and Directors Emeritus and Inside Directors serving in a post retirement capacity, as such terms are or may hereafter be defined in the Bylaws of the Company.

FIRST FINANCIAL BANKSHARES, INC.
By:	/s/ F. Scott Dueser
	F. Scott Dueser, President

Dated: April 23, 2019

5

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 effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

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

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

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

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

Date:    July 30, 2019

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 effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

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

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

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

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

Date:    July 30, 2019

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 June 30, 2019 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:    July 30, 2019

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

Subscribed and sworn to before me this 30th day of July, 2019.

/s/ Melissa Ann Fenton

Melissa Ann Fenton

Notary Public

My commission expires: October 11, 2020

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 June 30, 2019 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:    July 30, 2019

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

Subscribed and sworn to before me this 30^th day of July, 2019.

/s/ Melissa Ann Fenton

Melissa Ann Fenton

Notary Public

My commission expires: October 11, 2020

XML

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2019	Jul. 30, 2019
Document and Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Current Fiscal Year End Date	--12-31
Document Period End Date	Jun. 30, 2019
Entity Registrant Name	FIRST FINANCIAL BANKSHARES INC
Entity Central Index Key	0000036029
Entity Filer Category	Large Accelerated Filer
Entity Interactive Data Current	Yes
Entity Current Reporting Status	Yes
Entity File Number	0-7674
Entity Incorporation, State or Country Code	TX
Entity Tax Identification Number	75-0944023
Entity Address, Address Line One	400 Pine Street
Entity Address, City or Town	Abilene
Entity Address, State or Province	TX
City Area Code	325
Local Phone Number	627-7155
Entity Shell Company	false
Entity Small Business	false
Entity Emerging Growth Company	false
Title of 12(b) Security	Class A Common Stock
Trading Symbol	FFIN
Security Exchange Name	NASDAQ
Document Quarterly Report	true
Document Transition Report	false
Entity Address, Postal Zip Code	79601
Entity Common Stock, Shares Outstanding		135,809,224

XML

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
ASSETS
CASH AND DUE FROM BANKS	$ 178,345	$ 207,835	$ 178,217
FEDERAL FUNDS SOLD	700		8,450
INTEREST-BEARING DEPOSITS IN BANKS	128,652	40,812	99,499
Total cash and cash equivalents	307,697	248,647	286,166
INTEREST-BEARING TIME DEPOSITS IN BANKS	960	1,458	1,458
SECURITIES AVAILABLE-FOR-SALE, at fair value	3,259,492	3,158,777	3,197,567
LOANS:
Held for investment	4,040,952	3,953,636	3,831,480
Less – allowance for loan losses	(51,820)	(51,202)	(49,951)
Net loans held for investment	3,989,132	3,902,434	3,781,529
Held-for-sale ($18,981, $5,061 and $19,185 at fair value at June 30, 2019 and 2018 and December 31, 2018, respectively)	22,305	21,672	24,289
Net loans	4,011,437	3,924,106	3,805,818
BANK PREMISES AND EQUIPMENT, net	134,322	133,421	130,366
INTANGIBLE ASSETS	174,151	174,683	175,185
OTHER ASSETS	91,234	90,762	88,910
Total assets	7,979,293	7,731,854	7,685,470
LIABILITIES AND SHAREHOLDERS' EQUITY
NONINTEREST-BEARING DEPOSITS	2,167,552	2,116,107	2,105,953
INTEREST-BEARING DEPOSITS	4,202,214	4,064,282	4,104,654
Total deposits	6,369,766	6,180,389	6,210,607
DIVIDENDS PAYABLE	16,294	14,227	14,211
BORROWINGS	362,005	468,706	456,935
OTHER LIABILITIES	66,480	15,237	18,089
Total liabilities	6,814,545	6,678,559	6,699,842
SHAREHOLDERS' EQUITY:
Common stock – ($0.01 par value, authorized 200,000,000 shares; 135,809,224, 67,669,658 and 67,753,133 shares issued at June 30, 2019 and 2018 and December 31, 2018, respectively)	1,358	678	677
Capital surplus	448,349	443,114	439,731
Retained earnings	655,794	606,658	556,615
Treasury stock (shares at cost: 929,441, 491,170 and 467,811 at June 30, 2019 and 2018 and December 31, 2018, respectively)	(7,823)	(7,507)	(7,419)
Deferred compensation	7,823	7,507	7,419
Accumulated other comprehensive earnings (loss)	59,247	2,845	(11,395)
Total shareholders' equity	1,164,748	1,053,295	985,628
Total liabilities and shareholders' equity	$ 7,979,293	$ 7,731,854	$ 7,685,470

XML

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Statement of Financial Position [Abstract]
Loans held-for-sale, fair value	$ 18,981	$ 19,185	$ 5,061
Common stock, par value	$ 0.01	$ 0.01	$ 0.01
Common stock, shares authorized	200,000,000	200,000,000	200,000,000
Common stock, shares issued	135,809,224	67,753,133	67,669,658
Treasury stock, shares	929,441	467,811	491,170

XML

Consolidated Statements of Earnings - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
INTEREST INCOME:
Interest and fees on loans	$ 55,740	$ 49,105	$ 108,971	$ 95,851
Interest on investment securities:
Taxable	13,925	12,719	27,213	24,073
Exempt from federal income tax	9,244	9,983	19,007	20,324
Interest on federal funds sold and interest-bearing deposits in banks	667	271	1,286	912
Total interest income	79,576	72,078	156,477	141,160
INTEREST EXPENSE:
Interest on deposits	7,286	4,005	13,947	7,524
Other	675	462	1,401	576
Total interest expense	7,961	4,467	15,348	8,100
Net interest income	71,615	67,611	141,129	133,060
PROVISION FOR LOAN LOSSES	600	1,105	1,565	2,415
Net interest income after provision for loan losses	71,015	66,506	139,564	130,645
NONINTEREST INCOME:
Trust Fees	7,027	7,070	14,006	13,975
Service Charges on Deposit Accounts	5,374	5,375	10,550	10,259
ATM, interchange and credit card fees	7,352	7,041	14,192	14,037
Real estate mortgage operations	4,721	3,951	8,195	6,884
Net gain on sale of available-for-sale securities (includes $676 and $67 for the three months ended June 30, 2019 and 2018, respectively, and $676 and $1,288 for the six months ended June 30, 2019 and 2018, respectively, related to accumulated other comprehensive earnings reclassifications)	676	67	676	1,288
Net gain (loss) on sale of foreclosed assets	53	19	122	118
Net gain (loss) on sale of assets	6		6	(91)
Interest on loan recoveries	903	289	1,241	408
Other	1,864	1,676	3,425	3,034
Total noninterest income	27,976	25,488	52,413	49,912
NONINTEREST EXPENSE:
Salaries and employee benefits	27,394	26,862	53,918	53,065
Loss from partial settlement of pension plan			900
Net occupancy expense	2,779	2,806	5,542	5,689
Equipment expense	2,827	3,440	5,954	6,957
FDIC insurance premiums	538	632	1,076	1,199
ATM, interchange and credit card expenses	2,427	2,205	4,810	4,348
Professional and service fees	1,987	2,026	3,820	4,439
Printing, stationery and supplies	502	612	868	1,098
Operational and other losses	480	305	746	871
Software amortization and expense	1,287	479	2,210	1,003
Amortization of intangible assets	264	384	532	771
Other	7,819	7,393	15,297	15,503
Total noninterest expense	48,304	47,144	95,673	94,943
EARNINGS BEFORE INCOME TAXES	50,687	44,850	96,304	85,614
INCOME TAX EXPENSE (includes $142 and $14 for the three months ended June 30, 2019 and 2018, respectively, and $142 and $270 for the six months ended June 30, 2019 and 2018, respectively, related to income tax expense from reclassification items)	8,594	7,217	15,959	13,462
NET EARNINGS	$ 42,093	$ 37,633	$ 80,345	$ 72,152
EARNINGS PER SHARE, BASIC	$ 0.31	$ 0.28	$ 0.59	$ 0.53
EARNINGS PER SHARE, ASSUMING DILUTION	0.31	0.28	0.59	0.53
DIVIDENDS PER SHARE	$ 0.12	$ 0.11	$ 0.23	$ 0.20

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Consolidated Statements of Earnings (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Statement [Abstract]
Reclassifications adjustment for realized gains on investment securities included in net earnings (loss), before income tax	$ 676	$ 67	$ 676	$ 1,288
Income tax expense from reclassification items	$ 142	$ 14	$ 142	$ 270

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Consolidated Statements of Comprehensive Earnings - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
NET EARNINGS	$ 42,093	$ 37,633	$ 80,345	$ 72,152
OTHER ITEMS OF COMPREHENSIVE EARNINGS (LOSS):
Change in unrealized gain on investment securities available-for-sale, before income taxes	37,057	(11,600)	72,071	(54,306)
Reclassification adjustment for realized gains on investment securities included in net earnings, before income tax	(676)	(67)	(676)	(1,288)
Total other items of comprehensive earnings	36,381	(11,667)	71,395	(55,594)
Income tax benefit (expense) related to other items of comprehensive earnings	(7,640)	2,450	(14,993)	11,675
Reclassification of certain income tax effects related to the change in the U.S. statutory federal income tax rate under the Tax Cuts and Jobs Act to retained earnings.				5,759
COMPREHENSIVE EARNINGS	$ 70,834	$ 28,416	$ 136,747	$ 33,992

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Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Capital Surplus [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Deferred Compensation [Member]	Accumulated Other Comprehensive Earnings (Losses) [Member]
Beginning Balance at Dec. 31, 2017	$ 922,768	$ 663	$ 378,062	$ 517,257	$ (7,148)	$ 7,148	$ 26,786
Beginning Balance, Shares at Dec. 31, 2017		66,260,444			(495,964)
Net earnings (unaudited)	72,152			72,152
Stock option exercises (unaudited)	2,319	$ 1	2,318
Stock option exercises, Shares		109,133
Restricted stock grant (unaudited)	523		523
Restricted stock grant (unaudited), Shares		10,710
Cash dividends declared	(27,056)			(27,056)
Stock issued in acquisition of Commercial Bancshares, Inc.	58,087	$ 13	58,074
Stock issued in acquisition of Commercial Bancshares, Inc, Shares		1,289,371
Change in unrealized gain in investment securities available-for-sale, net of related income taxes (unaudited)	(43,919)						(43,919)
Shares purchased (redeemed) in connection with directors' deferred compensation plan, net (unaudited)					$ (271)	271
Shares purchased (redeemed) in connection with directors' deferred compensation plan, net, Shares					4,794
Stock option expense (unaudited)	754		754
Reclassification of certain income tax effects related to the change in the U.S. statutory federal income tax rate under the Tax Cuts and Jobs Act to retained earnings				(5,759)			5,759
Reclassification of unrealized gain in equity securities at December 31, 2017 from accumulated other comprehensive earnings to retained earnings (unaudited)				21			(21)
Ending Balance at Jun. 30, 2018	$ 985,628	$ 677	439,731	556,615	$ (7,419)	7,419	(11,395)
Ending Balance, Shares at Jun. 30, 2018		67,669,658
Treasury Stock, Ending Balance, Shares at Jun. 30, 2018	(491,170)				(491,170)
Beginning Balance at Mar. 31, 2018	$ 969,814	$ 676	437,868	533,427	$ (7,291)	7,291	(2,157)
Beginning Balance, Shares at Mar. 31, 2018		67,612,760
Treasury Stock, Beginning Balance, Shares at Mar. 31, 2018					(493,994)
Net earnings (unaudited)	37,633			37,633
Stock option exercises (unaudited)	964	$ 1	963
Stock option exercises, Shares		46,188
Restricted stock grant (unaudited)	523		523
Restricted stock grant (unaudited), Shares		10,710
Cash dividends declared	(14,466)			(14,466)
Change in unrealized gain in investment securities available-for-sale, net of related income taxes (unaudited)	(9,217)						(9,217)
Shares purchased (redeemed) in connection with directors' deferred compensation plan, net (unaudited)					$ (128)	128
Shares purchased (redeemed) in connection with directors' deferred compensation plan, net, Shares					2,824
Stock option expense (unaudited)	377		377
Reclassification of unrealized gain in equity securities at December 31, 2017 from accumulated other comprehensive earnings to retained earnings (unaudited)				21			(21)
Ending Balance at Jun. 30, 2018	$ 985,628	$ 677	439,731	556,615	$ (7,419)	7,419	(11,395)
Ending Balance, Shares at Jun. 30, 2018		67,669,658
Treasury Stock, Ending Balance, Shares at Jun. 30, 2018	(491,170)				(491,170)
Beginning Balance at Dec. 31, 2018	$ 1,053,295	$ 678	443,114	606,658	$ (7,507)	7,507	2,845
Beginning Balance, Shares at Dec. 31, 2018		67,753,133
Treasury Stock, Beginning Balance, Shares at Dec. 31, 2018	(467,811)				(467,811)
Net earnings (unaudited)	$ 80,345			80,345
Stock option exercises (unaudited)	3,186	$ 2	3,184
Stock option exercises, Shares		168,349
Restricted stock grant (unaudited)	1,426		1,426
Restricted stock grant (unaudited), Shares		47,532
Cash dividends declared	(30,531)			(30,531)
Change in unrealized gain in investment securities available-for-sale, net of related income taxes (unaudited)	56,402						56,402
Shares purchased (redeemed) in connection with directors' deferred compensation plan, net (unaudited)					$ (316)	316
Shares purchased (redeemed) in connection with directors' deferred compensation plan, net, Shares					2,709
Stock option expense (unaudited)	625		625
Two-for-one stock split in the form of a 100% stock dividend (unaudited)		$ 678		(678)
Two-for-one stock split in the form of a 100% stock dividend (unaudited), shares		67,840,210			(464,339)
Ending Balance at Jun. 30, 2019	$ 1,164,748	$ 1,358	448,349	655,794	$ (7,823)	7,823	59,247
Ending Balance, Shares at Jun. 30, 2019		135,809,224
Treasury Stock, Ending Balance, Shares at Jun. 30, 2019	(929,441)				(929,441)
Beginning Balance at Mar. 31, 2019	$ 1,107,522	$ 1,356	445,672	629,988	$ (7,660)	7,660	30,506
Beginning Balance, Shares at Mar. 31, 2019		135,680,420
Treasury Stock, Beginning Balance, Shares at Mar. 31, 2019					(928,678)
Net earnings (unaudited)	42,093			42,093
Stock option exercises (unaudited)	940	$ 2	938
Stock option exercises, Shares		81,272
Restricted stock grant (unaudited)	1,426		1,426
Restricted stock grant (unaudited), Shares		47,532
Cash dividends declared	(16,287)			(16,287)
Change in unrealized gain in investment securities available-for-sale, net of related income taxes (unaudited)	28,741						28,741
Shares purchased (redeemed) in connection with directors' deferred compensation plan, net (unaudited)	0				$ (163)	163
Shares purchased (redeemed) in connection with directors' deferred compensation plan, net, Shares					(763)
Stock option expense (unaudited)	313		313
Ending Balance at Jun. 30, 2019	$ 1,164,748	$ 1,358	$ 448,349	$ 655,794	$ (7,823)	$ 7,823	$ 59,247
Ending Balance, Shares at Jun. 30, 2019		135,809,224
Treasury Stock, Ending Balance, Shares at Jun. 30, 2019	(929,441)				(929,441)

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Consolidated Statements of Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Cash dividend per share	$ 0.12	$ 0.11	$ 0.23	$ 0.20
Common Stock Dividend Percentage			100.00%
Retained Earnings [Member]
Cash dividend per share	$ 0.012	$ 0.11	$ 0.23	$ 0.20

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Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
CASH FLOWS FROM OPERATING ACTIVITIES:
Net earnings	$ 80,345	$ 72,152
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	5,946	6,433
Provision for loan losses	1,565	2,415
Securities premium amortization (discount accretion), net	12,217	14,109
Gain (loss) on sale of assets, net	824	(1,245)
Deferred federal income tax expense (benefit)	2,206	(908)
Change in loans held-for-sale	(631)	(9,009)
Change in other assets	1,021	(1,192)
Change in other liabilities	5,219	6,218
Total adjustments	28,367	16,821
Net cash provided by operating activities	108,712	88,973
CASH FLOWS FROM INVESTING ACTIVITIES:
Cash received in acquisition of Commercial Bancshares, Inc.		18,653
Net decrease in interest-bearing time deposits in banks	498
Activity in available-for-sale securities:
Sales	66,052	149,125
Maturities	2,201,877	3,208,139
Purchases	(2,280,686)	(3,471,387)
Net increase in loans	(88,629)	(80,480)
Purchases of bank premises and equipment and other assets	(6,360)	(8,544)
Proceeds from sale of bank premises and equipment and other assets	187	776
Net cash used in investing activities	(107,061)	(183,718)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase (decrease) in noninterest-bearing deposits	51,445	(97,737)
Net increase in interest-bearing deposits	137,932	3,481
Net increase (decrease) in borrowings	(106,701)	125,935
Common stock transactions:
Proceeds from stock issuances	3,186	2,319
Dividends paid	(28,463)	(25,434)
Net cash provided by financing activities	57,399	8,564
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	59,050	(86,181)
CASH AND CASH EQUIVALENTS, beginning of period	248,647	372,347
CASH AND CASH EQUIVALENTS, end of period	307,697	286,166
SUPPLEMENTAL INFORMATION AND NONCASH TRANSACTIONS:
Interest paid	15,062	8,074
Federal income taxes paid	12,752	12,762
Transfer of loans and bank premises to other real estate	364	126
Investment securities purchased but not settled	29,355
Restricted Stock Grant to Officers and Directors	$ 1,426	523
Stocks issued in acquisition of Commercial Bancshares, Inc.		$ 58,087

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Basis of Presentation

6 Months Ended

Jun. 30, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation

Note 1 – Basis of Presentation

The unaudited 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 a full-service commercial banking business. Our banking centers are located primarily in Central, North Central, Southeast and West Texas. As of June 30, 2019, we had 73 financial centers across Texas, with eleven locations in Abilene, three locations in Weatherford, two locations in Cleburne, Conroe, San Angelo, Stephenville and Granbury, and one location each in Acton, Albany, Aledo, Alvarado, Beaumont, Boyd, Bridgeport, Brock, Burleson, Cisco, Clyde, Cut and Shoot, Decatur, Eastland, El Campo, Fort Worth, Fulshear, Glen Rose, Grapevine, Hereford, Huntsville, Keller, Kingwood, Magnolia, Mauriceville, Merkel, Midlothian, Mineral Wells, Montgomery, Moran, New Waverly, Newton, Odessa, Orange, Palacios, Port Arthur, Ranger, Rising Star, Roby, Southlake, Spring, Sweetwater, Tomball, Trent, Trophy Club, Vidor, Waxahachie, Willis and Willow Park, all in Texas. Our trust subsidiary has eight locations which are located in Abilene, Fort Worth, Houston, Odessa, Beaumont, San Angelo, Stephenville and Sweetwater.

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, 2018. All adjustments were of a normal recurring nature. However, the results of operations for the three and six months ended June 30, 2019, are not necessarily indicative of the results to be expected for the year ending December 31, 2019, due to seasonality, changes in economic conditions and loan credit quality, interest rate fluctuations, regulatory and legislative changes and other factors. The preparation of financial statements in conformity with United States generally accepted accounting principles (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the financial statement date. Actual results could vary. Certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted under U.S. Securities and Exchange Commission (“SEC”) rules and regulations. The Company evaluated subsequent events for potential recognition and/or disclosure through the date the consolidated financial statements were issued.

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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Stock Split and Stock Repurchase

6 Months Ended

Jun. 30, 2019

Equity [Abstract]

Stock Repurchase

Note 2 – Stock Split and Stock Repurchase

On April 23, 2019, the Company’s Board of Directors declared a two-for-one stock split in the form of a 100% stock dividend with a record date of May 15, 2019 that was distributed on June 3, 2019. All per share amounts in this report have been restated to reflect this stock split. An amount equal to the par value of the additional common shares to be issued pursuant to the stock split was reflected as a transfer from retained earnings to common stock in the consolidated financial statements as of and for the three months ended March 31, 2019 and as of and for the six months ended June 30, 2019.

On July 25, 2017, the Company’s Board of Directors authorized the repurchase of up to 2,000,000 common shares through September 30, 2020. The shares buyback plan authorizes management to repurchase the shares at such time as repurchases are considered beneficial to shareholders. Any repurchase of shares 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 June 30, 2019, no shares were repurchased under this authorization.

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Earnings Per Share

6 Months Ended

Jun. 30, 2019

Earnings Per Share [Abstract]

Earnings Per Share

Note 3 – 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 June 30, 2019 and 2018, the Company assumes that all dilutive outstanding options to purchase common shares have been exercised at the beginning of the period (or the time of issuance, if later). The dilutive effect of these outstanding options and the restricted shares is reflected by application of the treasury stock method, whereby the proceeds from exercised options and restricted shares are assumed to be used to purchase common shares 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 June 30, 2019 and 2018 were 135,650,599 and 135,194,550 shares, respectively. The weighted average common shares outstanding used in computing basic earnings per common share for the six months ended June 30, 2019 and 2018 were 135,572,859 and 135,124,672. The weighted average common shares outstanding used in computing fully diluted earnings per common share for the three months ended June 30, 2019 and 2018 were 136,218,235 and 135,848,336 shares, respectively. The weighted average common shares outstanding used in computing fully diluted earnings per common share for the six months ended June 30, 2019 and 2018 were 136,195,811 and 135,735,930. For the three and six months ended June 30, 2019 and 2018, there were no stock options that were anti-dilutive that have been excluded from the EPS calculation.

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Interest-bearing Time Deposits in Banks and Securities

6 Months Ended

Jun. 30, 2019

Cash and Cash Equivalents [Abstract]

Interest-bearing Time Deposits in Banks and Securities

Note 4 – Interest-bearing Time Deposits in Banks and Securities

Interest-bearing time deposits in banks totaled $960,000, $1,458,000 and $1,458,000 at June 30, 2019 and 2018 and December 31, 2018, respectively, and have original maturities ranging from one to three months.

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. Debt securities not classified as held-to-maturity or trading are classified as available-for-sale and recorded at 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 debt securities that have unrealized gains and losses are excluded from earnings and reported net of tax in accumulated other comprehensive income until realized. Declines in the fair value of available-for-sale debt securities below their cost that are deemed to be other-than-temporary are reflected in earnings as a realized loss if there is no ability or intent to hold to recovery. If the Company does not intend to sell and will not be required to sell prior to recovery of its amortized cost basis, only the credit component of the impairment is reflected in earnings as a realized loss with the noncredit portion recognized in other comprehensive income. In estimating other-than-temporary impairment losses, we consider (1) the length of time and the extent to which the fair value has been less than cost, (2) the financial condition and near-term prospects of the issuer, and (3) our intent and ability to retain our investment in the issuer for a period of time sufficient to allow for any anticipated recovery in fair value. 

Effective January 1, 2018, in accordance with ASU 2016-01 (see note 13), increases or decreases in the fair value of equity securities are recorded in earnings. Prior to January 1, 2018, such increases or decreases were recorded similar to increases or decreases in debt securities.

The Company records its available-for-sale and equity securities portfolio at fair value. 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 debt 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 debt securities are analyzed quarterly for possible other-than-temporary impairment. The analysis considers (i) whether we have the intent to sell our debt securities prior to recovery and/or maturity, (ii) whether it is more likely than not that we will have to sell our debt securities prior to recovery and/or maturity, (iii) the length of time and extent to which the fair value has been less than amortized cost, 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 debt 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 U.S. Treasury securities, obligations of state and political subdivisions, 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 value its investment securities, which the Company reviews as well as the underlying pricing methodologies for reasonableness and to ensure such prices are aligned with pricing matrices. The Company validates prices supplied by the independent pricing services by comparison to prices obtained from other third-party sources on a quarterly basis.

A summary of the Company’s available-for-sale securities follows (in thousands):

	June 30, 2019
	Amortized Cost Basis		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses			Estimated Fair Value
U.S. Treasury securities	$	9,984	$	36	$	—		$	10,020
Obligations of states and political subdivisions		1,103,682		53,593		(61	)		1,157,214
Corporate bonds and other		4,643		51		—			4,694
Residential mortgage-backed securities		1,579,544		19,732		(3,101	)		1,596,175
Commercial mortgage-backed securities		484,919		6,929		(459	)		491,389
Total securities available-for-sale	$	3,182,772	$	80,341	$	(3,621	)	$	3,259,492

	June 30, 2018
	Amortized Cost Basis		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses			Estimated Fair Value
U.S. Treasury Securities	$	9,957	$	8	$	—		$	9,965
Obligations of U.S. government sponsored enterprises and agencies		304		—		(1	)		303
Obligations of states and political subdivisions		1,257,547		29,924		(2,696	)		1,284,775
Corporate bonds and other		4,861		—		(79	)		4,782
Residential mortgage-backed securities		1,464,345		1,630		(30,718	)		1,435,257
Commercial mortgage-backed securities		471,398		—		(8,913	)		462,485
Total securities available-for-sale	$	3,208,412	$	31,562	$	(42,407	)	$	3,197,567
	December 31, 2018
	Amortized Cost Basis		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses			Estimated Fair Value
U.S. Treasury securities	$	9,970	$	—	$	(8	)	$	9,962
Obligations of U.S. government sponsored enterprises and agencies		301		—		—			301
Obligations of states and political subdivisions		1,229,828		30,013		(1,970	)		1,257,871
Corporate bonds and other		4,875		—		(77	)		4,798
Residential mortgage-backed securities		1,472,228		3,928		(21,611	)		1,454,545
Commercial mortgage-backed securities		436,366		670		(5,736	)		431,300
Total securities available-for-sale	$	3,153,568	$	34,611	$	(29,402	)	$	3,158,777

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 June 30, 2019 were computed by using scheduled amortization of balances and historical prepayment rates. At June 30, 2019 and 2018, and December 31, 2018, the Company did not hold CMOs that entail higher risks than standard mortgage-backed securities.

The amortized cost and estimated fair value of available-for-sale securities at June 30, 2019 by contractual and expected maturity, are shown below (in thousands):

	Amortized Cost Basis		Estimated Fair Value
Due within one year	$	165,912	$	167,217
Due after one year through five years		483,916		506,941
Due after five years through ten years		466,755		495,582
Due after ten years		1,726		2,188
Mortgage-backed securities		2,064,463		2,087,564
Total	$	3,182,772	$	3,259,492

The following tables disclose the Company’s investment securities that have been in a continuous unrealized-loss position for less than 12 months and for 12 or more months (in thousands):

	Less than 12 Months				12 Months or Longer				Total
June 30, 2019	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Obligations of states and political subdivisions	$	—	$	—	$	9,777	$	61	$	9,777	$	61
Residential mortgage-backed securities		17,594		77		404,946		3,024		422,540		3,101
Commercial mortgage-backed securities		—		—		134,881		459		134,881		459
Total	$	17,594	$	77	$	549,604	$	3,544	$	567,198	$	3,621
	Less than 12 Months				12 Months or Longer				Total
June 30, 2018	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Obligations of U.S. government sponsored enterprises and agencies	$	303	$	1	$	—	$	—	$	303	$	1
Obligations of states and political subdivisions		136,950		1,122		43,239		1,574		180,189		2,696
Corporate bonds and other		4,617		76		233		3		4,850		79
Residential mortgage-backed securities		1,073,327		21,838		227,155		8,880		1,300,482		30,718
Commercial mortgage-backed securities		379,201		7,477		83,285		1,436		462,486		8,913
Total	$	1,594,398	$	30,514	$	353,912	$	11,893	$	1,948,310	$	42,407
	Less than 12 Months				12 Months or Longer				Total
December 31, 2018	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
U.S. Treasury securities	$	9,962	$	8	$	—	$	—	$	9,962	$	8
Obligations of U.S. government sponsored enterprises and agencies		—		—		301		—		301		—
Obligations of state and political subdivisions		27,489		107		114,461		1,863		141,950		1,970
Corporate bonds and other		4,348		68		450		9		4,798		77
Residential mortgage-backed securities		119,584		483		922,289		21,128		1,041,873		21,611
Commercial mortgage-backed securities		1,994		5		343,015		5,731		345,009		5,736
Total	$	163,377	$	671	$	1,380,516	$	28,731	$	1,543,893	$	29,402

The number of investments in an unrealized loss position totaled 109 at June 30, 2019. 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 this 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 June 30, 2019 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. At June 30, 2019, 84.95% of our available-for-sale securities that are obligations of states and political subdivisions were issued within the State of Texas, of which 33.55% are guaranteed by the Texas Permanent School Fund.

At June 30, 2019, $2,137,620,000 of the Company’s securities were pledged as collateral for public or trust fund deposits, repurchase agreements and for other purposes required or permitted by law.

During the three months ended June 30, 2019 and 2018, sales of investment securities that were classified as available-for-sale totaled $65,821,000 and $57,680,000, respectively. Gross realized gains from security sales during the second quarter of 2019 and 2018 totaled $689,000 and $287,000, respectively. Gross realized losses from security sales during second quarter of 2019 and 2018 totaled $13,000 and $220,000, respectively.

During the six months ended June 30, 2019 and 2018, sales of investment securities classified as available-for-sale totaled $66,052,000 and $149,125,000, respectively. Gross realized gains from security sales during the six-month periods ended June 30, 2019 and 2018 totaled $693,000 and $1,529,000, respectively. Gross realized losses from security sales during the six-month periods ended June 30, 2019 and 2018 totaled $17,000 and $241,000, respectively.

The specific identification method was used to determine cost in order to compute the realized gains and losses.

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Loans Held for Investment and Allowance for Loan Losses

6 Months Ended

Jun. 30, 2019

Receivables [Abstract]

Loans Held for Investment and Allowance for Loan Losses

Note 5 – Loans Held for Investment 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 an annual basis and makes changes as appropriate. Management receives and reviews monthly reports related to loan originations, quality, concentrations, delinquencies, nonperforming 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 within Texas. 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 for loan losses is an amount which represents management’s best estimate of probable losses that are inherent in the Company’s loan portfolio as of the balance sheet date. The allowance for loan losses is comprised of three elements: (i) specific reserves determined based on probable losses on specific classified loans; (ii) a historical valuation reserve component that considers historical loss rates and estimated loss emergence periods; and (iii) qualitative reserves 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 historical valuation reserve, the loan portfolio, less cash secured loans, government guaranteed loans and classified loans, is multiplied by the Company’s historical loss rate adjusted for the estimated loss emergence period. Specific allocations are increased or decreased in accordance with deterioration or improvement in credit quality and a corresponding increase or decrease 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, oil and gas prices, drought conditions, 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 qualitative reserve serves to estimate for additional areas of losses 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 decline in the economy 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 methodology and could require, in accordance with U.S. GAAP, additional provisions to the allowance for loan losses based on their judgment of information available to them at the time of their examination as well as changes to our methodology.

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 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 less cost to sell. Other loan impairments for non-collateral dependent loans are measured based on the present value of expected future cash flows or the loan’s observable market price. At June 30, 2019 and 2018, and December 31, 2018, 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 less cost to sell.

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. For all impaired loans, including the Company’s troubled debt restructurings, the Company performs a periodic, well-documented credit evaluation of the borrower’s financial condition and prospects for repayment to assess the likelihood that all principal and interest payments required under the terms of the agreement will be collected in full. When doubt exists about the ultimate collectability of principal and interest, the troubled debt restructuring remains on non-accrual status and payments received are applied to reduce principal to the extent necessary to eliminate such doubt. This determination of accrual status is judgmental and is based on facts and circumstances related to each troubled debt restructuring. Each of these loans is individually evaluated for impairment and a specific reserve is recorded based on probable losses, taking into consideration the related collateral, modified loan terms and cash flow. As of June 30, 2019 and 2018 and December 31, 2018, substantially all of the Company’s troubled debt restructured loans are included in the non-accrual totals.

Loans acquired, including loans acquired in a business combination, are initially recorded at fair value with no valuation allowance. Acquired loans are segregated between those considered to be credit impaired and those deemed performing. To make this determination, management considers such factors as past due status, non-accrual status and credit risk ratings. The fair value of acquired performing loans is determined by discounting expected cash flows, both principal and interest, at prevailing market interest rates. The difference between the fair value and principal balances at acquisition date, the fair value discount, is accreted into interest income over the estimated life of the acquired portfolio.

Purchased credit impaired loans are those loans that showed evidence of deterioration of credit quality since origination and for which it is probable, at acquisition, that the Company will be unable to collect all amounts contractually owed. Their acquisition fair value, which includes a credit component at the acquisition date, was based on the estimate of cash flows, both principal and interest, expected to be collected or estimated collateral values if cash flows are not estimable, discounted at prevailing market rates of interest. The difference between the discounted cash flows expected at acquisition and the investment in the loan is recognized as interest income on a level-yield method over the life of the loan, unless management was unable to reasonably forecast cash flows in which case the loans were placed on nonaccrual. Subsequent to the acquisition date, increases in expected cash flows will generally result in a recovery of any previously recorded allowance for loan loss, to the extent applicable, and/or a reclassification from the nonaccretable difference to accretable yield, which will be recognized prospectively. Decreases in expected cash flows subsequent to acquisition are recognized as impairment. Valuation allowances on these impaired loans reflect only losses incurred after the acquisition. The carrying amount of purchased credit impaired loans at June 30, 2019 and 2018 and December 31, 2018 were $464,000, $2,813,000 and $827,000, respectively, compared to a contractual balance of $750,000, $3,918,000 and $1,157,000, respectively. Other purchased credit impaired loan disclosures were omitted due to immateriality.

Loans held-for-investment by class of financing receivables are as follows (in thousands):

	June 30,				December 31,
	2019		2018		2018
Commercial	$	813,887	$	775,010	$	844,953
Agricultural		97,535		92,583		96,677
Real estate		2,730,585		2,567,878		2,639,346
Consumer		398,945		396,009		372,660
Total loans held-for-investment	$	4,040,952	$	3,831,480	$	3,953,636

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

	June 30,				December 31,
	2019		2018		2018
Non-accrual loans*	$	26,408	$	26,685	$	27,534
Loans still accruing and past due 90 days or more		300		200		1,008
Troubled debt restructured loans**		471		514		513
Total	$	27,179	$	27,399	$	29,055

* Includes $464,000, $2,813,000 and $827,000 of purchased credit impaired loans as of June 30, 2019 and 2018, and December 31, 2018, respectively.

** Troubled debt restructured loans of $3,906,000, $4,329,000 and $3,840,000, whose interest collection, after considering economic and business conditions and collection efforts, is doubtful are included in non-accrual loans at June 30, 2019 and 2018, and December 31, 2018, respectively.

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

June 30, 2019				June 30, 2018				December 31, 2018
Recorded Investment		Valuation Allowance		Recorded Investment		Valuation Allowance		Recorded Investment		Valuation Allowance
	$26,408	$	3,866	$	26,685	$	4,823	$	27,534	$	4,069

The Company had $27,860,000, $28,104,000 and $29,632,000 in non-accrual, past due 90 days or more and still accruing, restructured loans and foreclosed assets at June 30, 2019 and 2018, and December 31, 2018, respectively. Non-accrual loans at June 30, 2019 and 2018, and December 31, 2018, consisted of the following by class of financing receivables (in thousands):

	June 30,				December 31,
	2019		2018		2018
Commercial	$	8,189	$	7,580	$	9,334
Agricultural		1,047		1,259		759
Real estate		16,787		16,715		16,714
Consumer		385		1,131		727
Total	$	26,408	$	26,685	$	27,534

No significant additional funds are committed to be advanced in connection with impaired loans as of June 30, 2019.

The Company’s impaired loans and related allowance are summarized in the following tables by class of financing receivables (in thousands). No interest income was recognized on impaired loans subsequent to their classification as impaired.

June 30, 2019	Unpaid Contractual Principal Balance		Recorded Investment With No Allowance*		Recorded Investment With Allowance		Total Recorded Investment		Related Allowance		Year-to-date Average Recorded Investment		Three- Month Average Recorded Investment
Commercial	$	9,340	$	6,212	$	1,977	$	8,189	$	1,022	$	8,699	$	8,562
Agricultural		1,108		434		613		1,047		119		1,090		1,071
Real Estate		24,262		5,034		11,753		16,787		2,515		18,054		17,105
Consumer		525		27		358		385		210		465		427
Total	$	35,235	$	11,707	$	14,701	$	26,408	$	3,866	$	28,308	$	27,165

* Includes $464,000 of purchased credit impaired loans.

June 30, 2018	Unpaid Contractual Principal Balance		Recorded Investment With No Allowance*		Recorded Investment With Allowance		Total Recorded Investment		Related Allowance		Year-to-date Average Recorded Investment		Three- Month Average Recorded Investment
Commercial	$	9,432	$	3,264	$	4,316	$	7,580	$	1,379	$	8,485	$	8,226
Agricultural		1,278		50		1,209		1,259		368		1,670		1,589
Real Estate		22,358		3,569		13,146		16,715		2,645		18,441		18,019
Consumer		1,344		169		962		1,131		431		1,240		1,192
Total	$	34,412	$	7,052	$	19,633	$	26,685	$	4,823	$	29,836	$	29,026

* Includes $2,813,000 of purchased credit impaired loans.

December 31, 2018	Unpaid Contractual Principal Balance		Recorded Investment With No Allowance*		Recorded Investment With Allowance		Total Recorded Investment		Related Allowance		12 Month Average Recorded Investment
Commercial	$	10,808	$	6,728	$	2,606	$	9,334	$	1,133	$	7,986
Agricultural		799		213		546		759		170		842
Real Estate		24,072		6,699		10,015		16,714		2,409		16,042
Consumer		935		101		626		727		357		914
Total	$	36,614	$	13,741	$	13,793	$	27,534	$	4,069	$	25,784

* Includes $827,000 of purchased credit impaired loans.

The Company recognized interest income on impaired loans prior to being recognized as impaired of approximately $948,000 during the year ended December 31, 2018. Such amounts for the three-month and six-month periods ended June 30, 2019 and 2018 were not significant.

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

The ratings 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 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.

The following summarizes the Company’s internal ratings of its loans held-for-investment by class of financing receivables and portfolio segments, which are the same (in thousands):

June 30, 2019	Pass		Special Mention		Substandard		Doubtful		Total
Commercial	$	767,275	$	31,124	$	15,488	$	—	$	813,887
Agricultural		94,481		58		2,996		—		97,535
Real Estate		2,656,139		20,044		54,402		—		2,730,585
Consumer		397,017		264		1,664		—		398,945
Total	$	3,914,912	$	51,490	$	74,550	$	—	$	4,040,952
June 30, 2018	Pass		Special Mention		Substandard		Doubtful		Total
Commercial	$	749,387	$	6,439	$	19,184	$	—	$	775,010
Agricultural		87,768		1,568		3,247		—		92,583
Real Estate		2,487,399		26,182		54,297		—		2,567,878
Consumer		393,200		368		2,441		—		396,009
Total	$	3,717,754	$	34,557	$	79,169	$	—	$	3,831,480

December 31, 2018	Pass		Special Mention		Substandard		Doubtful		Total
Commercial	$	804,584	$	23,392	$	16,977	$	—	$	844,953
Agricultural		92,864		46		3,767		—		96,677
Real Estate		2,559,379		26,626		53,341		—		2,639,346
Consumer		370,510		315		1,835		—		372,660
Total	$	3,827,337	$	50,379	$	75,920	$	—	$	3,953,636

The Company’s past due loans are as follows (in thousands):

June 30, 2019	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	$	2,671	$	352	$	610	$	3,633	$	810,254	$	813,887	$	58
Agricultural		315		163		30		508		97,027		97,535		30
Real Estate		16,130		712		865		17,707		2,712,878		2,730,585		180
Consumer		821		99		40		960		397,985		398,945		32
Total	$	19,937	$	1,326	$	1,545	$	22,808	$	4,018,144	$	4,040,952	$	300
June 30, 2018	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	$	4,950	$	1,085	$	3,029	$	9,064	$	765,946	$	775,010	$	74
Agricultural		626		159		—		785		91,798		92,583		—
Real Estate		13,441		474		532		14,447		2,553,431		2,567,878		70
Consumer		919		232		76		1,227		394,782		396,009		56
Total	$	19,936	$	1,950	$	3,637	$	25,523	$	3,805,957	$	3,831,480	$	200
December 31, 2018	15-59 Days Past Due*		60-89 Days Past Due		Greater Than 90 Days		Total Past Due		Total Current		Total Loans		Total 90 Days  Past Due Still Accruing
Commercial	$	3,546	$	682	$	677	$	4,905	$	840,048	$	844,953	$	—
Agricultural		791		19		26		836		95,841		96,677		—
Real Estate		13,185		881		2,020		16,086		2,623,260		2,639,346		960
Consumer		782		263		54		1,099		371,561		372,660		48
Total	$	18,304	$	1,845	$	2,777	$	22,926	$	3,930,710	$	3,953,636	$	1,008

* 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 following table details the allowance for loan losses by portfolio segment (in thousands). There were no allowances for purchased credit impaired loans at June 30, 2019 and 2018, and December 31, 2018. Allocation of a portion of the allowance to one category of loans does not preclude its availability to absorb losses in other categories.

June 30, 2019	Commercial		Agricultural		Real Estate		Consumer		Total
Loans individually evaluated for impairment	$	1,022	$	119	$	2,515	$	210	$	3,866
Loans collectively evaluated for impairment		12,877		1,241		28,284		5,552		47,954
Total	$	13,899	$	1,360	$	30,799	$	5,762	$	51,820

June 30, 2018	Commercial		Agricultural		Real Estate		Consumer		Total
Loans individually evaluated for impairment	$	1,379	$	368	$	2,645	$	431	$	4,823
Loans collectively evaluated for impairment		7,839		1,034		30,598		5,657		45,128
Total	$	9,218	$	1,402	$	33,243	$	6,088	$	49,951
December 31, 2018	Commercial		Agricultural		Real Estate		Consumer		Total
Loans individually evaluated for impairment	$	1,133	$	170	$	2,409	$	357	$	4,069
Loans collectively evaluated for impairment		10,815		1,276		29,933		5,109		47,133
Total	$	11,948	$	1,446	$	32,342	$	5,466	$	51,202

Changes in the allowance for loan losses are summarized as follows by portfolio segment (in thousands):

Three months ended June 30, 2019	Commercial			Agricultural			Real Estate			Consumer			Total
Beginning balance	$	12,475		$	1,430		$	31,887		$	5,793		$	51,585
Provision for loan losses		1,418			61			(929	)		50			600
Recoveries		423			5			60			209			697
Charge-offs		(417	)		(136	)		(219	)		(290	)		(1,062	)
Ending balance	$	13,899		$	1,360		$	30,799		$	5,762		$	51,820
Three months ended June 30, 2018	Commercial			Agricultural			Real Estate			Consumer			Total
Beginning balance	$	9,277		$	1,512		$	32,539		$	6,171		$	49,499
Provision for loan losses		335			(115	)		799			86			1,105
Recoveries		126			5			18			147			296
Charge-offs		(520	)		—			(113	)		(316	)		(949	)
Ending balance	$	9,218		$	1,402		$	33,243		$	6,088		$	49,951
Six months ended June 30, 2019	Commercial			Agricultural			Real Estate			Consumer			Total
Beginning balance	$	11,948		$	1,446		$	32,342		$	5,466		$	51,202
Provision for loan losses		1,612			42			(531	)		442			1,565
Recoveries		1,073			7			149			349			1,578
Charge-offs		(734	)		(135	)		(1,161	)		(495	)		(2,525	)
Ending balance	$	13,899		$	1,360		$	30,799		$	5,762		$	51,820
Six months ended June 30, 2018	Commercial			Agricultural			Real Estate			Consumer			Total
Beginning balance	$	10,865		$	1,305		$	29,896		$	6,090		$	48,156
Provision for loan losses		(1,292	)		88			3,233			386			2,415
Recoveries		284			9			260			247			800
Charge-offs		(639	)		—			(146	)		(635	)		(1,420	)
Ending balance	$	9,218		$	1,402		$	33,243		$	6,088		$	49,951

The Company’s recorded investment in loans related to the balance in the allowance for loan losses on the basis of the Company’s impairment methodology is as follows (in thousands). Purchased credit impaired loans of $464,000, $2,813,000 and $827,000 at June 30, 2019 and 2018, and December 31, 2018, respectively, are included in loans individually evaluated for impairment.

June 30, 2019	Commercial		Agricultural		Real Estate		Consumer		Total
Loans individually evaluated for impairment	$	8,189	$	1,047	$	16,787	$	385	$	26,408
Loans collectively evaluated for impairment		805,698		96,488		2,713,798		398,560		4,014,544
Total	$	813,887	$	97,535	$	2,730,585	$	398,945	$	4,040,952

June 30, 2018	Commercial		Agricultural		Real Estate		Consumer		Total
Loans individually evaluated for impairment	$	7,580	$	1,259	$	16,715	$	1,131	$	26,685
Loans collectively evaluated for impairment		767,430		91,324		2,551,163		394,878		3,804,795
Total	$	775,010	$	92,583	$	2,567,878	$	396,009	$	3,831,480

December 31, 2018	Commercial		Agricultural		Real Estate		Consumer		Total
Loans individually evaluated for impairment	$	9,334	$	759	$	16,714	$	727	$	27,534
Loan collectively evaluated for impairment		835,619		95,918		2,622,632		371,933		3,926,102
Total	$	844,953	$	96,677	$	2,639,346	$	372,660	$	3,953,636

The Company’s loans that were modified and considered troubled debt restructurings are as follows (in thousands):

	Three Months Ended June 30, 2019						Six Months Ended June 30, 2019
	Number		Pre- Modification Recorded Investment		Post- Modification Recorded Investment		Number		Pre- Modification Recorded Investment		Post- Modification Recorded Investment
Commercial		2	$	122	$	122		3	$	279	$	279
Agricultural		2		253		253		10		619		619
Real Estate		—		—		—		4		650		650
Consumer		—		—		—		—		—		—
Total		4	$	375	$	375		17	$	1,548	$	1,548

	Three Months Ended June 30, 2018						Six Months Ended June 30, 2018
	Number		Pre- Modification Recorded Investment		Post- Modification Recorded Investment		Number		Pre- Modification Recorded Investment		Post- Modification Recorded Investment
Commercial		1	$	279	$	279		1	$	279	$	279
Agricultural		—		—		—		1		4		4
Real Estate		2		162		162		4		525		525
Consumer		3		39		39		6		113		113
Total		6	$	480	$	480		12	$	921	$	921

The balances below provide information as to how the loans were modified as troubled debt restructured loans (in thousands):

	Three Months Ended June 30, 2019						Six Months Ended June 30, 2019
	Adjusted Interest Rate		Extended Maturity		Combined Rate and Maturity		Adjusted Interest Rate		Extended Maturity		Combined Rate and Maturity
Commercial	$	—	$	122	$	—	$	—	$	279	$	—
Agricultural		—		253		—		—		354		265
Real Estate		—		—		—		—		202		448
Consumer		—		—		—		—		—		—
Total	$	—	$	375	$	—	$	—	$	835	$	713

	Three Months Ended June 30, 2018						Six Months Ended June 30, 2018
	Adjusted Interest Rate		Extended Maturity		Combined Rate and Maturity		Adjusted Interest Rate		Extended Maturity		Combined Rate and Maturity
Commercial	$	—	$	—	$	279		—	$	—	$	279
Agricultural		—		—		—		—		—		4
Real Estate		—		162		—		—		162		363
Consumer		—		—		39		—		—		113
Total	$	—	$	162	$	318		—	$	162	$	759

During the three months ended June 30, 2019 and 2018, no loans were modified as a troubled debt restructured loan within the previous 12 months and for which there was a payment default. During the six months ended June 30, 2019 and 2018, no loans were modified as a troubled debt restricted during loan within the previous 12 months and for which there was a payment default. A default for purposes of this disclosure is a troubled debt restructured loan in which the borrower is 90 days past due or more or results in the foreclosure and repossession of the applicable collateral.

As of June 30, 2019, 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 (FHLB) to provide liquidity and meet pledging requirements for those customers eligible to have securities pledged to secure certain uninsured deposits. At June 30, 2019, $2,563,225,000 in loans held by our bank subsidiary were subject to blanket liens as security for this line of credit. At June 30, 2019, there were no advances or letters of credit outstanding under this line of credit.

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Loans Held for Sale

6 Months Ended

Jun. 30, 2019

Debt Disclosure [Abstract]

Loans Held for Sale

Note 6 – Loans Held for Sale

The Company originates certain mortgage loans for sale in the secondary market. The mortgage loan sales contracts contain indemnification clauses should the loans default, generally in the first three to nine 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.

Loans held for sale totaled $22,305,000, $24,289,000 and $21,672​​​​​​​,000 at June 30, 2019 and 2018, and December 31, 2018, respectively. At June 30, 2019 and 2018, and December 31, 2018, $3,324,000, $19,228,000 and $2,487,000 are valued at the lower of cost or fair value, and the remaining amounts are valued under the fair value option. The change to the fair value option for loans held for sale was effective at June 30, 2018 and was done in conjunction with the Company’s move to mandatory delivery in the secondary market and the purchase of forward mortgage-backed securities to manage the changes in fair value (see note 7 for additional information).

These loans, which are sold on a servicing released basis, are valued using a market approach by utilizing either: (i) the fair value of the securities backed by similar mortgage loans, adjusted for certain factors to approximate the fair value of a whole mortgage loan, including the value attributable to mortgage servicing and credit risk, (ii) current commitments to purchase loans or (iii) recent observable market trades for similar loans, adjusted for credit risk and other individual loan characteristics. As these prices are derived from market observable inputs, the Company classifies these valuations as Level 2 in the fair value disclosures (see note 12). Interest income on mortgage loans held for sale is recognized based on the contractual rates and reflected in interest income on loans in the consolidated statements of earnings. The Company has no continuing ownership in any residential mortgage loans sold.

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Derivative Financial Instruments

6 Months Ended

Jun. 30, 2019

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Financial Instruments

Note 7 – Derivative Financial Instruments

The Company enters into interest rate lock commitments (“IRLCs”) with customers to originate residential mortgage loans at a specific interest rate that are ultimately sold in the secondary market. These commitments, which contain fixed expiration dates, offer the borrower an interest rate guarantee provided the loan meets underwriting guidelines and closes within the timeframe established by the Company.

Beginning in the second quarter of 2018, the Company purchased forward mortgage-backed securities contracts to manage the changes in fair value associated with changes in interest rates related to a portion of the IRLCs. These instruments are typically entered into at the time the IRLC is made.

These financial instruments are not designated as hedging instruments and are used for asset and liability management needs. All derivatives are carried at fair value in either other assets or other liabilities.

The fair values of IRLCs are based on current secondary market prices for underlying loans and estimated servicing value with similar coupons, maturity and credit quality, subject to the anticipated loan funding probability (pull-through rate). The fair value of IRLCs is subject to change primarily due to changes in interest rates and the estimated pull-through rate. These commitments are classified as Level 2 in the fair value disclosures (see note 12), as the valuations are based on observable market inputs.

Forward mortgage-backed securities contracts are exchange-traded or traded within highly active dealer markets. In order to determine the fair value of these instruments, the Company utilizes the exchange price or dealer market price for the particular derivative contract and these instruments are therefore classified as Level 2 in the fair value disclosures (see note 12). The estimated fair values are subject to change primarily due to changes in interest rates.

The following table provides the outstanding notional balances and fair values of outstanding derivative positions (dollars in thousands):

June 30, 2019:	Outstanding Notional Balance		Asset Derivative Fair Value		Liability Derivative Fair Value
IRLCs	$	89,655	$	1,525	$	—
Forward mortgage-backed securities trades		72,500		—		254

June 30, 2018:	Outstanding Notional Balance		Asset Derivative Fair Value		Liability Derivative Fair Value
IRLCs	$	61,520	$	501	$	—
Forward mortgage-backed securities trades		17,500		—		47

December 31, 2018:	Outstanding Notional Balance		Asset Derivative Fair Value		Liability Derivative Fair Value
IRLCs	$	37,088	$	765	$	—
Forward mortgage-backed securities trades		45,500		—		403

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Borrowings

6 Months Ended

Jun. 30, 2019

Debt Disclosure [Abstract]

Short-term Debt [Text Block]

Note 8 – Borrowings

Borrowings consisted of the following (dollars in thousands):

	June 30,				December 31,
	2019		2018		2018
Securities sold under agreements with customers to repurchase	$	356,555	$	389,010	$	409,631
Federal funds purchased		5,450		7,925		4,075
Advances from Federal Home Loan Bank of Dallas		—		60,000		55,000
Total	$	362,005	$	456,935	$	468,706

Securities sold under repurchase agreements are generally with significant customers of the Company that require short-term liquidity for their funds for which the Company pledges certain securities that have a fair value equal to at least the amount of the borrowings. The agreements mature daily and therefore the risk arising from a decline in the fair value of the collateral pledged is minimal. The securities pledged are mortgage-backed securities. These agreements do not include “right of set-off” provisions and therefore the Company does not offset such agreements for financial reporting purposes.

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Income Taxes

6 Months Ended

Jun. 30, 2019

Income Tax Disclosure [Abstract]

Income Taxes

Note 9 – Income Taxes

Income tax expense was $8,594,000 for the second quarter of 2019 as compared to $7,217,000 for the same period in 2018. The Company’s effective tax rates on pretax income were 16.96% and 16.09% for the second quarters of 2019 and 2018, respectively. Income tax expense was $15,959,000 for the six months ended June 30, 2019 as compared to $13,462,000 for the same period in 2018. The Company’s effective tax rates on pretax income were 16.57% and 15.72% for the six months ended June 2019 and 2018, respectively. The effective tax rates differ from the statutory federal tax rate of 21% primarily 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 excess tax benefits related to our directors’ deferred compensation plan.

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Stock Option Plan and Restricted Stock Plan

6 Months Ended

Jun. 30, 2019

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock Option Plan and Restricted Stock Plan

Note 10 – Stock Option Plan and Restricted Stock Plan

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. On June 26, 2019, the Company granted 398,850 incentive stock options with an exercise price of $29.70 per share. The fair value of the options was $7.31 per option and was estimated using the Black-Scholes options pricing model with the following weighted average assumptions: risk free interest rate of 1.83%; expected dividend yield of 1.62%; expected life of 6.64 years; and expected volatility of 26.69%. No options were granted in 2018.

The Company recorded stock option expense totaling $313,000 and $377,000 for the three-month periods ended June 30, 2019 and 2018, respectively. The Company recorded stock option expense totaling $625,000 and $754,000 for the six months ended June 30, 2019 and 2018, respectively. The additional disclosure requirements under authoritative accounting guidance have been omitted due to the amounts being insignificant.

On April 25, 2017, upon re-election of existing directors, 29,300 restricted shares with a total value of $600,000 were granted to the ten non-employee directors and were expensed over the period from the grant date to April 24, 2018, the date of the next annual shareholders’ meeting at which these directors’ term expired. On April 24, 2018, upon re-election of nine of the existing directors, 21,420 restricted shares with a total value of $540,000 were granted to these non-employee directors and were expensed over the period from grant date to April 23, 2019, the date of the next annual shareholders’ meeting at which the directors’ term expired. On April 23, 2019, upon re-election of nine of the existing directors and two new directors, 21,714 restricted shares with a total value of $660,000 were granted to these non-employee directors and will be expensed over the period from the grant date to April 28, 2020, the Company’s next annual shareholders’ meeting at which the directors’ term expires. The Company recorded director expense related to these restricted share grants of $135,000 and $140,000 for the three-month periods ended June 30, 2019 and 2018, respectively. The Company recorded director expense related to these restricted stock grants of $270,000 and $290,000 for the six months ended June 30, 2019 and 2018, respectively.

On October 27, 2015, the Company granted 62,546 restricted shares with a total value of $1,060,000 to certain officers that was expensed over the vesting period of three years. On October 25, 2016, the Company granted 30,810 restricted stock shares with a total value of $560,000 to certain officers that is being expensed over the vesting period of three years. On October 24, 2017, the Company granted 28,382 restricted shares with a total value of $655,000 to certain officers that is being expensed over the vesting period of one to three years. On October 23, 2018, the Company granted 52,042 restricted shares with a total value of $1,440,000 to certain officers that will be expensed over a three-year vesting period. On June 26, 2019, the Company granted 25,818 restricted shares with a total value of $766,000 to certain officers that is being expensed over the vesting period of three years. The Company recorded restricted stock expense for officers of $210,000 and $158,000 for the three-month periods ended June 30, 2019 and 2018, respectively. The Company recorded restricted stock expense for officers of $415,000 and $326,000 for the six-month periods ended June 30, 2019 and 2018, respectively.

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Pension Plan

6 Months Ended

Jun. 30, 2019

Retirement Benefits [Abstract]

Pension Plan

Note 11 – Pension Plan

The Company’s defined benefit pension plan was frozen effective January 1, 2004, whereby no new participants were added to the plan and no additional years of service were accrued to participants. 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. As a result of its evaluation of its funding status, the Company made no contribution in 2018, and has not made a contribution through June 30, 2019.

In December 2018, due to the rising interest rate environment, the Company determined it was in the best of interest of its shareholders to settle its pension obligation to its retiree group in payout, approximately 53% of the pension benefit obligation on that date, and recorded a loss on settlement totaling $1,546,000 for the year ended December 31, 2018. In 2019, the Company made a decision to terminate and settle the remaining obligation in its pension plan with an effective termination date of June 30, 2019, following which date the Company is obligated to settle the Company’s remaining obligations of the plan upon receipt of regulatory approval. Final settlement of the Company’s remaining obligation under the plan is expected to be made in the fourth quarter of 2019 or first or second quarter of 2020, subject to regulatory approval.

In addition, the Company had a multiple employer pension plan related to its acquisition of Orange Savings Bank in 2013. This plan was likewise frozen. During the first quarter of 2019, the Company made a decision to remove this plan from the multiple employer plan and merge it into the Company’s existing pension plan. The Company recorded $900,000 in pension merger expense for the three months ended March 31, 2019 in connection with this merger of the Orange pension plan. In May 2019, the Company assumed the Orange pension obligation of $2,740,000 and received related assets totaling $1,829,000.

Net periodic benefit costs totaling $19,000 and $56,000 were recorded for the three months ended June 30, 2019 and 2018, respectively. Net periodic benefit costs totaling $942,000 and $111,000 were recorded for the six months ended June 30, 2019 and 2018, respectively, which includes the Orange pension merger costs discussed above.

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Fair Value Disclosures

6 Months Ended

Jun. 30, 2019

Fair Value Disclosures [Abstract]

Fair Value Disclosures

Note 12 – 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.

See notes 6 and 7 related to the determination of fair value for loans held-for-sale, IRLCs and forward mortgage-backed securities trades.

There were no transfers between Level 1 and Level 2 or Level 2 and Level 3 during the three and six months ended June 30, 2019 and 2018, and the year ended December 31, 2018.

The following table summarizes the Company’s available-for-sale securities which are measured at fair value on a recurring basis, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value (dollars in thousands):

June 30, 2019	Level 1 Inputs		Level 2 Inputs		Level 3 Inputs		Total Fair Value
Available-for-sale investment securities:
U.S. Treasury securities	$	10,020	$	—	$	—	$	10,020
Obligations of states and political subdivisions		—		1,157,214		—		1,157,214
Corporate bonds		—		228		—		228
Residential mortgage-backed securities		—		1,596,175		—		1,596,175
Commercial mortgage-backed securities		—		491,389		—		491,389
Other securities		4,466		—		—		4,466
Total	$	14,486	$	3,245,006	$	—	$	3,259,492
Loans held-for-sale	$	—	$	18,981	$	—	$	18,981
IRLCs	$	—	$	1,525	$	—	$	1,525
Forward mortgage-backed securities trades	$	—	$	254	$	—	$	254

June 30, 2018	Level 1 Inputs		Level 2 Inputs		Level 3 Inputs		Total Fair Value
Available-for-sale investment securities:
U.S. Treasury securities	$	9,965	$	—	$	—	$	9,965
Obligations of U. S. government sponsored enterprises and agencies		—		303		—		303
Obligations of states and political subdivisions		—		1,284,775		—		1,284,775
Corporate bonds		—		451		—		451
Residential mortgage-backed securities		—		1,435,257		—		1,435,257
Commercial mortgage-backed securities		—		462,485		—		462,485
Other securities		4,331		—		—		4,331
Total	$	14,296	$	3,183,271	$	—	$	3,197,567
Loans held-for-sale	$	—	$	5,061	$	—	$	5,061
IRLCs	$	—	$	501	$	—	$	501
Forward mortgage-backed securities trades	$	—	$	47	$	—	$	47

  

December 31, 2018	Level 1 Inputs		Level 2 Inputs		Level 3 Inputs		Total Fair Value
Available-for-sale investment securities:
U.S. Treasury securities	$	9,962	$	—	$	—	$	9,962
Obligations of U. S. government sponsored enterprises and agencies		—		301		—		301
Obligations of states and political subdivisions		—		1,257,871		—		1,257,871
Corporate bonds		—		450		—		450
Residential mortgage-backed securities		—		1,454,545		—		1,454,545
Commercial mortgage-backed securities		—		431,300		—		431,300
Other securities		4,348		—		—		4,348
Total	$	14,310	$	3,144,467	$	—	$	3,158,777
Loans held-for-sale	$	—	$	19,185	$	—	$	19,185
IRLCs	$	—	$	765	$	—	$	765
Forward mortgage-backed securities trades	$	—	$	403	$	—	$	403

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 June 30, 2019:

Impaired Loans – Impaired loans are reported at the fair value of the underlying collateral less selling costs if repayment is expected solely from the collateral. Collateral values are estimated using Level 2 inputs based on observable market data. At June 30, 2019, impaired loans with a carrying value of $14,701,000 were reduced by specific valuation reserves totaling $3,866,000 resulting in a net fair value of $10,835,000. The Company also had impaired loans of $11,707,000 with no specific valuation reserve at June 30, 2019, due to the loans carrying value generally being lower than the value of the collateral associated with the loan.

Loans Held-for-Sale – Loans held-for-sale are reported at either the fair value option or the lower of cost or fair value (see notes 6 and 7).

IRLCs and Forward Mortgage-Backed Securities Trades – IRLCs and forward mortgage-backed securities trades are reported at fair value (see note 7).

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 and six months ended June 30, 2019 and 2018 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 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. Re-evaluation 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 June 30,
	2019		2018
Carrying value of other real estate owned prior to re-measurement	$	—	$	526
Write-downs included in gain (loss) on sale of other real estate owned		—		(126	)
Fair value	$	—	$	400
	Six Months Ended June 30,
	2019		2018
Carrying value of other real estate owned prior to re-measurement	$	—	$	526
Write-downs included in gain (loss) on sale of other real estate owned		—		(126	)
Fair value	$	—	$	400

At June 30, 2019 and 2018, and December 31, 2018, other real estate owned totaled $635,000, $642,000 and $448,000, 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. 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 Levels 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 were as follows (in thousands).

	June 30,								December 31,
	2019				2018				2018
	Carrying Value		Estimated Fair Value		Carrying Value		Estimated Fair Value		Carrying Value		Estimated Fair Value		Fair Value Hierarchy
Cash and due from banks	$	178,345	$	178,345	$	178,217	$	178,217	$	207,835	$	207,835		Level 1
Federal funds sold		700		700		8,450		8,450		—		—		Level 1
Interest-bearing deposits in banks		128,652		128,652		99,499		99,499		40,812		40,812		Level 1
Interest-bearing time deposits in banks		960		960		1,458		1,458		1,458		1,458		Level 2
Available-for-sale securities		3,259,492		3,259,492		3,197,567		3,197,567		3,158,777		3,158,777		Levels 1 and 2
Loans held for investment		3,989,132		4,026,543		3,781,529		3,807,267		3,902,434		3,947,391		Level 3
Loans held for sale		22,305		22,347		24,289		24,550		21,672		21,779		Level 2
Accrued interest receivable		36,954		36,954		36,513		36,513		36,765		36,765		Level 2
Deposits with stated maturities		433,511		433,811		483,230		484,230		442,161		441,727		Level 2
Deposits with no stated maturities		5,936,255		5,936,255		5,727,377		5,727,377		5,738,228		5,738,228		Level 1
Borrowings		362,005		362,005		456,935		456,935		468,706		468,706		Level 2
Accrued interest payable		694		694		223		223		408		408		Level 2
IRLCs		1,525		1,525		501		501		765		765		Level 2
Forward mortgage backed securities trades		254		254		47		47		403		403		Level 2

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Recently Issued Authoritative Accounting Guidance

6 Months Ended

Jun. 30, 2019

Accounting Changes and Error Corrections [Abstract]

Recently Issued Authoritative Accounting Guidance

Note 13 – Recently Issued Authoritative Accounting Guidance

Accounting Standards Update (“ASU”) 2014-09, “Revenue from Contracts with Customers.” ASU 2014-09 implemented a comprehensive new revenue recognition standard that supersedes substantially all existing revenue recognition guidance. The new standard’s core principle is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. To achieve that core principle, an entity applies the following steps: (i) identify the contract(s) with a customer, (ii) identify the performance obligations in the contract, (iii) determine the transaction price, (iv) allocate the transaction price to the performance obligations in the contract and (v) recognize revenue when (or as) the entity satisfies a performance obligation. ASU 2015-4 “Revenue from Contracts with Customers – Deferral of the Effective Date” deferred the effective date of ASU 2014-09 by one year and as a result, the new standard became effective in the first quarter of 2018. The Company’s revenue is comprised of net interest income on financial assets and financial liabilities, which is explicitly excluded from the scope of ASU 2014-09, and non-interest income. The adoption of the new standard in the first quarter of 2018 did not have a significant impact on the Company’s financial statements and no adjustment to opening retained earnings was recorded.

ASU 2016-01, ASU 2016-01 “Financial Instruments – Overall: Recognition and Measurement of Financial Assets and Financial Liabilities.” ASU 2016-01, among other things, (i) requires equity investments, with certain exceptions, to be measured at fair value with changes in fair value recognized in net income, (ii) simplified the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment, (iii) eliminated the requirement for public business entities to disclose the methods and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet, (iv) required public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes, (v) required an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments, (vi) required separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balance sheet or the accompanying notes to the financial statements and (vii) clarified that an entity should evaluate the need for a valuation allowance on a deferred tax asset related to available-for-sale securities. ASU 2016-1 became effective for the Company on January 1, 2018 and did not have a significant impact on the Company’s financial statements.

ASU 2016-02, “Leases.” ASU 2016-02 amended current lease accounting to require lessees to recognize (i) a lease liability, which is a lessee’s obligation to make lease payments arising from a lease, measured on a discounted basis, and (ii) a right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term. ASU 2016-02 does not significantly change lease accounting requirements applicable to lessors; however, certain changes were made to align, where necessary, lessor accounting with the lessee accounting model. The amended guidance became effective in the first quarter of 2019 and required transition using a modified retrospective approach for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. The Company evaluated the provisions of the new lease standard and, due to the small dollar amounts and number of lease agreements, the effect for the Company on January 1, 2019 was not significant.

ASU 2016-13, “Financial Instruments – Credit Losses.” ASU 2016-13 implements a comprehensive change in estimating the allowances for loan losses from the current model of losses inherent in the loan portfolio to a current expected credit loss model that generally is expected to result in earlier recognition of allowances for losses. ASU 2016-13 requires the measurement of all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts and requires enhanced disclosures related to the significant estimates and judgments used in estimating credit losses, as well as the credit quality and underwriting standards of an organization’s portfolio. In addition, ASU 2016-13 amends the accounting for credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. ASU 2016-13 will be effective for the Company as of January 1, 2020. The Company has formed a working group comprised of individuals from various functional areas including credit, risk management, finance and information technology, among others to assist in the implementation of ASU 2016-13. The Company is currently working through our implementation plan that includes assessment of processes, portfolio segmentation, data validation, model development and internal controls. Additionally, the Company is working with a third-party vendor to assist with implementation and model development. The Company continues to evaluate the potential impact of ASU 2016-13 on the Company’s financial statements, but expect that the impact of adoption will be significantly influenced by the composition, characteristics and quality of our loan and securities portfolios as well as the prevailing economic conditions and forecasts as of the adoption date.

ASU 2017-04, “Intangibles – Goodwill and Other.” ASU 2017-04 will amend and simplify current goodwill impairment testing to eliminate Step 2 from the current provisions. Under the new guidance, an entity should perform the goodwill impairment test by comparing the fair value of a reporting unit with its carrying value and recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value. An entity still has the option to perform the qualitative assessment for a reporting unit to determine if a quantitative impairment test is necessary. ASU 2017-04 will be effective for the Company on January 1, 2020 and is not expected to have a significant impact on the Company’s financial statements.

ASU 2018-02, “Income Statement – Reporting Comprehensive Income: Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income.” ASU 2018-02 was issued to address the income tax accounting treatment of the stranded tax effects within other comprehensive income due to the prohibition of backward tracing due to an income tax rate change that was initially recorded in other comprehensive income. This issue came about from the enactment of the Tax Cuts and Jobs Act on December 22, 2017 that changed the Company’s income tax rate from 35% to 21%. The ASU changed current accounting whereby an entity may elect to reclassify the stranded tax effect from accumulated other comprehensive income to retained earnings. The ASU was effective for periods beginning after December 15, 2018 although early adoption was permitted. The Company early adopted ASU 2018-02 in the first quarter of 2018 and reclassified its stranded tax debit of $5,759,000 within accumulated other comprehensive income to retained earnings.

ASU 2018-13, “Fair Value Measurement – Changes to the Disclosure Requirements for Fair Value Measurement” eliminates the requirements to disclose the amount and reason for transfers between Level 1 and Level 2 fair value methodology, the policy for the timing of transfers between levels and the valuation process for Level 3 fair value measurements. ASU 2018-13 requires an entity to disclose relevant quantitative information used to develop Level 3 fair value measurements. ASU 2018-13 will become effective for the Company on January 1, 2020 and is not expected to have a significant impact on the Company’s financial statements.

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Acquisition

6 Months Ended

Jun. 30, 2019

Business Combinations [Abstract]

Acquisition

Note 14 – Acquisition

On October 12, 2017, we entered into an agreement and plan of reorganization to acquire Commercial Bancshares, Inc. and its wholly owned bank subsidiary, Commercial State Bank, Kingwood, Texas. On January 1, 2018, the transaction was completed. Pursuant to the agreement, we issued 1,289,371 shares of the Company’s common stock in exchange for all of the outstanding shares of Commercial Bancshares, Inc. In addition, Commercial Bancshares, Inc. made a $22,075,000 special dividend to its shareholders prior to closing of the transaction, which was increased for the amount by which Commercial Bancshares, Inc.’s consolidated shareholders’ equity as of January 1, 2018 exceeded $42,402,000, after certain adjustments per the merger agreement.

At closing, Commercial Bancshares, Inc. was merged into the Company and Commercial State Bank, Kingwood, Texas, was merged into First Financial Bank, National Association, Abilene, Texas, a wholly owned subsidiary of the Company. The primary purpose of the acquisition was to expand the Company’s market share around Houston. Factors that contributed to a purchase price resulting in goodwill include Commercial State Bank’s record of earnings, strong management and board of directors, strong local economic environment and opportunity for growth. The results of operations from this acquisition are included in the consolidated earnings of the Company commencing January 1, 2018.

The following table presents the amounts recorded on the consolidated balance sheet on the acquisition date (dollars in thousands):

Fair value of consideration paid:
Common stock issued (1,289,371 shares)	$	58,087
Fair value of identifiable assets acquired:
Cash and cash equivalents		18,653
Securities available-for-sale		64,501
Loans		266,327
Identifiable intangible assets		3,167
Other assets		15,375
Total identifiable assets acquired		368,023
Fair value of liabilities assumed:
Deposits		341,902
Other liabilities		(373	)
Total liabilities assumed		341,529
Fair value of net identifiable assets acquired		26,494
Goodwill resulting from acquisition	$	31,593

Goodwill recorded in the acquisition was accounted for in accordance with the authoritative business combination guidance. Accordingly, goodwill will not be amortized but will be tested for impairment annually. The goodwill recorded is not deductible for federal income tax purposes.

The fair value of total loans acquired was $266,327,000 at acquisition compared to contractual amounts of $271,714,000. The fair value of purchased credit impaired loans at acquisition was $3,013,000 compared to contractual amounts of $3,806,000. Additional purchased credit impaired loan disclosures were omitted due to immateriality. All other acquired loans were considered performing loans.

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Summary of Significant Accounting Policies (Policies)

6 Months Ended

Jun. 30, 2019

Accounting Policies [Abstract]

Investment Securities

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. Debt securities not classified as held-to-maturity or trading are classified as available-for-sale and recorded at 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.

The Company records its available-for-sale and equity securities portfolio at fair value. 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 debt 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 debt securities are analyzed quarterly for possible other-than-temporary impairment. The analysis considers (i) whether we have the intent to sell our debt securities prior to recovery and/or maturity, (ii) whether it is more likely than not that we will have to sell our debt securities prior to recovery and/or maturity, (iii) the length of time and extent to which the fair value has been less than amortized cost, 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 debt 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 U.S. Treasury securities, obligations of state and political subdivisions, 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 value its investment securities, which the Company reviews as well as the underlying pricing methodologies for reasonableness and to ensure such prices are aligned with pricing matrices. The Company validates prices supplied by the independent pricing services by comparison to prices obtained from other third-party sources on a quarterly basis.

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 an annual basis and makes changes as appropriate. Management receives and reviews monthly reports related to loan originations, quality, concentrations, delinquencies, nonperforming 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 within Texas. 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 for loan losses is an amount which represents management’s best estimate of probable losses that are inherent in the Company’s loan portfolio as of the balance sheet date. The allowance for loan losses is comprised of three elements: (i) specific reserves determined based on probable losses on specific classified loans; (ii) a historical valuation reserve component that considers historical loss rates and estimated loss emergence periods; and (iii) qualitative reserves 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 historical valuation reserve, the loan portfolio, less cash secured loans, government guaranteed loans and classified loans, is multiplied by the Company’s historical loss rate adjusted for the estimated loss emergence period. Specific allocations are increased or decreased in accordance with deterioration or improvement in credit quality and a corresponding increase or decrease 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, oil and gas prices, drought conditions, 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 qualitative reserve serves to estimate for additional areas of losses 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 decline in the economy 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 methodology and could require, in accordance with U.S. GAAP, additional provisions to the allowance for loan losses based on their judgment of information available to them at the time of their examination as well as changes to our methodology.

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 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 less cost to sell. Other loan impairments for non-collateral dependent loans are measured based on the present value of expected future cash flows or the loan’s observable market price. At June 30, 2019 and 2018, and December 31, 2018, 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 less cost to sell.

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. For all impaired loans, including the Company’s troubled debt restructurings, the Company performs a periodic, well-documented credit evaluation of the borrower’s financial condition and prospects for repayment to assess the likelihood that all principal and interest payments required under the terms of the agreement will be collected in full. When doubt exists about the ultimate collectability of principal and interest, the troubled debt restructuring remains on non-accrual status and payments received are applied to reduce principal to the extent necessary to eliminate such doubt. This determination of accrual status is judgmental and is based on facts and circumstances related to each troubled debt restructuring. Each of these loans is individually evaluated for impairment and a specific reserve is recorded based on probable losses, taking into consideration the related collateral, modified loan terms and cash flow. As of June 30, 2019 and 2018 and December 31, 2018, substantially all of the Company’s troubled debt restructured loans are included in the non-accrual totals.

Loans acquired, including loans acquired in a business combination, are initially recorded at fair value with no valuation allowance. Acquired loans are segregated between those considered to be credit impaired and those deemed performing. To make this determination, management considers such factors as past due status, non-accrual status and credit risk ratings. The fair value of acquired performing loans is determined by discounting expected cash flows, both principal and interest, at prevailing market interest rates. The difference between the fair value and principal balances at acquisition date, the fair value discount, is accreted into interest income over the estimated life of the acquired portfolio.

Purchased credit impaired loans are those loans that showed evidence of deterioration of credit quality since origination and for which it is probable, at acquisition, that the Company will be unable to collect all amounts contractually owed. Their acquisition fair value, which includes a credit component at the acquisition date, was based on the estimate of cash flows, both principal and interest, expected to be collected or estimated collateral values if cash flows are not estimable, discounted at prevailing market rates of interest. The difference between the discounted cash flows expected at acquisition and the investment in the loan is recognized as interest income on a level-yield method over the life of the loan, unless management was unable to reasonably forecast cash flows in which case the loans were placed on nonaccrual. Subsequent to the acquisition date, increases in expected cash flows will generally result in a recovery of any previously recorded allowance for loan loss, to the extent applicable, and/or a reclassification from the nonaccretable difference to accretable yield, which will be recognized prospectively. Decreases in expected cash flows subsequent to acquisition are recognized as impairment. Valuation allowances on these impaired loans reflect only losses incurred after the acquisition. The carrying amount of purchased credit impaired loans at June 30, 2019 and 2018 and December 31, 2018 were $464,000, $2,813,000 and $827,000, respectively, compared to a contractual balance of $750,000, $3,918,000 and $1,157,000, respectively. Other purchased credit impaired loan disclosures were omitted due to immateriality.

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.

Recently Issued Authoritative Accounting Guidance

Accounting Standards Update (“ASU”) 2014-09, “Revenue from Contracts with Customers.” ASU 2014-09 implemented a comprehensive new revenue recognition standard that supersedes substantially all existing revenue recognition guidance. The new standard’s core principle is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. To achieve that core principle, an entity applies the following steps: (i) identify the contract(s) with a customer, (ii) identify the performance obligations in the contract, (iii) determine the transaction price, (iv) allocate the transaction price to the performance obligations in the contract and (v) recognize revenue when (or as) the entity satisfies a performance obligation. ASU 2015-4 “Revenue from Contracts with Customers – Deferral of the Effective Date” deferred the effective date of ASU 2014-09 by one year and as a result, the new standard became effective in the first quarter of 2018. The Company’s revenue is comprised of net interest income on financial assets and financial liabilities, which is explicitly excluded from the scope of ASU 2014-09, and non-interest income. The adoption of the new standard in the first quarter of 2018 did not have a significant impact on the Company’s financial statements and no adjustment to opening retained earnings was recorded.

ASU 2016-01, ASU 2016-01 “Financial Instruments – Overall: Recognition and Measurement of Financial Assets and Financial Liabilities.” ASU 2016-01, among other things, (i) requires equity investments, with certain exceptions, to be measured at fair value with changes in fair value recognized in net income, (ii) simplified the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment, (iii) eliminated the requirement for public business entities to disclose the methods and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet, (iv) required public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes, (v) required an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments, (vi) required separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balance sheet or the accompanying notes to the financial statements and (vii) clarified that an entity should evaluate the need for a valuation allowance on a deferred tax asset related to available-for-sale securities. ASU 2016-1 became effective for the Company on January 1, 2018 and did not have a significant impact on the Company’s financial statements.

ASU 2016-02, “Leases.” ASU 2016-02 amended current lease accounting to require lessees to recognize (i) a lease liability, which is a lessee’s obligation to make lease payments arising from a lease, measured on a discounted basis, and (ii) a right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term. ASU 2016-02 does not significantly change lease accounting requirements applicable to lessors; however, certain changes were made to align, where necessary, lessor accounting with the lessee accounting model. The amended guidance became effective in the first quarter of 2019 and required transition using a modified retrospective approach for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. The Company evaluated the provisions of the new lease standard and, due to the small dollar amounts and number of lease agreements, the effect for the Company on January 1, 2019 was not significant.

ASU 2016-13, “Financial Instruments – Credit Losses.” ASU 2016-13 implements a comprehensive change in estimating the allowances for loan losses from the current model of losses inherent in the loan portfolio to a current expected credit loss model that generally is expected to result in earlier recognition of allowances for losses. ASU 2016-13 requires the measurement of all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts and requires enhanced disclosures related to the significant estimates and judgments used in estimating credit losses, as well as the credit quality and underwriting standards of an organization’s portfolio. In addition, ASU 2016-13 amends the accounting for credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. ASU 2016-13 will be effective for the Company as of January 1, 2020. The Company has formed a working group comprised of individuals from various functional areas including credit, risk management, finance and information technology, among others to assist in the implementation of ASU 2016-13. The Company is currently working through our implementation plan that includes assessment of processes, portfolio segmentation, data validation, model development and internal controls. Additionally, the Company is working with a third-party vendor to assist with implementation and model development. The Company continues to evaluate the potential impact of ASU 2016-13 on the Company’s financial statements, but expect that the impact of adoption will be significantly influenced by the composition, characteristics and quality of our loan and securities portfolios as well as the prevailing economic conditions and forecasts as of the adoption date.

ASU 2017-04, “Intangibles – Goodwill and Other.” ASU 2017-04 will amend and simplify current goodwill impairment testing to eliminate Step 2 from the current provisions. Under the new guidance, an entity should perform the goodwill impairment test by comparing the fair value of a reporting unit with its carrying value and recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value. An entity still has the option to perform the qualitative assessment for a reporting unit to determine if a quantitative impairment test is necessary. ASU 2017-04 will be effective for the Company on January 1, 2020 and is not expected to have a significant impact on the Company’s financial statements.

ASU 2018-02, “Income Statement – Reporting Comprehensive Income: Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income.” ASU 2018-02 was issued to address the income tax accounting treatment of the stranded tax effects within other comprehensive income due to the prohibition of backward tracing due to an income tax rate change that was initially recorded in other comprehensive income. This issue came about from the enactment of the Tax Cuts and Jobs Act on December 22, 2017 that changed the Company’s income tax rate from 35% to 21%. The ASU changed current accounting whereby an entity may elect to reclassify the stranded tax effect from accumulated other comprehensive income to retained earnings. The ASU was effective for periods beginning after December 15, 2018 although early adoption was permitted. The Company early adopted ASU 2018-02 in the first quarter of 2018 and reclassified its stranded tax debit of $5,759,000 within accumulated other comprehensive income to retained earnings.

ASU 2018-13, “Fair Value Measurement – Changes to the Disclosure Requirements for Fair Value Measurement” eliminates the requirements to disclose the amount and reason for transfers between Level 1 and Level 2 fair value methodology, the policy for the timing of transfers between levels and the valuation process for Level 3 fair value measurements. ASU 2018-13 requires an entity to disclose relevant quantitative information used to develop Level 3 fair value measurements. ASU 2018-13 will become effective for the Company on January 1, 2020 and is not expected to have a significant impact on the Company’s financial statements.

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

6 Months Ended

Jun. 30, 2019

Cash and Cash Equivalents [Abstract]

Summary of Available-for-Sale Securities

A summary of the Company’s available-for-sale securities follows (in thousands):

	June 30, 2019
	Amortized Cost Basis		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses			Estimated Fair Value
U.S. Treasury securities	$	9,984	$	36	$	—		$	10,020
Obligations of states and political subdivisions		1,103,682		53,593		(61	)		1,157,214
Corporate bonds and other		4,643		51		—			4,694
Residential mortgage-backed securities		1,579,544		19,732		(3,101	)		1,596,175
Commercial mortgage-backed securities		484,919		6,929		(459	)		491,389
Total securities available-for-sale	$	3,182,772	$	80,341	$	(3,621	)	$	3,259,492

	June 30, 2018
	Amortized Cost Basis		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses			Estimated Fair Value
U.S. Treasury Securities	$	9,957	$	8	$	—		$	9,965
Obligations of U.S. government sponsored enterprises and agencies		304		—		(1	)		303
Obligations of states and political subdivisions		1,257,547		29,924		(2,696	)		1,284,775
Corporate bonds and other		4,861		—		(79	)		4,782
Residential mortgage-backed securities		1,464,345		1,630		(30,718	)		1,435,257
Commercial mortgage-backed securities		471,398		—		(8,913	)		462,485
Total securities available-for-sale	$	3,208,412	$	31,562	$	(42,407	)	$	3,197,567
	December 31, 2018
	Amortized Cost Basis		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses			Estimated Fair Value
U.S. Treasury securities	$	9,970	$	—	$	(8	)	$	9,962
Obligations of U.S. government sponsored enterprises and agencies		301		—		—			301
Obligations of states and political subdivisions		1,229,828		30,013		(1,970	)		1,257,871
Corporate bonds and other		4,875		—		(77	)		4,798
Residential mortgage-backed securities		1,472,228		3,928		(21,611	)		1,454,545
Commercial mortgage-backed securities		436,366		670		(5,736	)		431,300
Total securities available-for-sale	$	3,153,568	$	34,611	$	(29,402	)	$	3,158,777

Amortized Cost and Estimated Fair Value of Available-for-Sale Securities

The amortized cost and estimated fair value of available-for-sale securities at June 30, 2019 by contractual and expected maturity, are shown below (in thousands):

	Amortized Cost Basis		Estimated Fair Value
Due within one year	$	165,912	$	167,217
Due after one year through five years		483,916		506,941
Due after five years through ten years		466,755		495,582
Due after ten years		1,726		2,188
Mortgage-backed securities		2,064,463		2,087,564
Total	$	3,182,772	$	3,259,492

Continuous Unrealized-Loss Position of Available-for-Sale Securities

The following tables disclose the Company’s investment securities that have been in a continuous unrealized-loss position for less than 12 months and for 12 or more months (in thousands):

	Less than 12 Months				12 Months or Longer				Total
June 30, 2019	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Obligations of states and political subdivisions	$	—	$	—	$	9,777	$	61	$	9,777	$	61
Residential mortgage-backed securities		17,594		77		404,946		3,024		422,540		3,101
Commercial mortgage-backed securities		—		—		134,881		459		134,881		459
Total	$	17,594	$	77	$	549,604	$	3,544	$	567,198	$	3,621
	Less than 12 Months				12 Months or Longer				Total
June 30, 2018	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Obligations of U.S. government sponsored enterprises and agencies	$	303	$	1	$	—	$	—	$	303	$	1
Obligations of states and political subdivisions		136,950		1,122		43,239		1,574		180,189		2,696
Corporate bonds and other		4,617		76		233		3		4,850		79
Residential mortgage-backed securities		1,073,327		21,838		227,155		8,880		1,300,482		30,718
Commercial mortgage-backed securities		379,201		7,477		83,285		1,436		462,486		8,913
Total	$	1,594,398	$	30,514	$	353,912	$	11,893	$	1,948,310	$	42,407
	Less than 12 Months				12 Months or Longer				Total
December 31, 2018	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
U.S. Treasury securities	$	9,962	$	8	$	—	$	—	$	9,962	$	8
Obligations of U.S. government sponsored enterprises and agencies		—		—		301		—		301		—
Obligations of state and political subdivisions		27,489		107		114,461		1,863		141,950		1,970
Corporate bonds and other		4,348		68		450		9		4,798		77
Residential mortgage-backed securities		119,584		483		922,289		21,128		1,041,873		21,611
Commercial mortgage-backed securities		1,994		5		343,015		5,731		345,009		5,736
Total	$	163,377	$	671	$	1,380,516	$	28,731	$	1,543,893	$	29,402

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Loans Held for Investment and Allowance for Loan Losses (Tables)

6 Months Ended

Jun. 30, 2019

Receivables [Abstract]

Loans Held-for-Investment by Class of Financing Receivables

Loans held-for-investment by class of financing receivables are as follows (in thousands):

	June 30,				December 31,
	2019		2018		2018
Commercial	$	813,887	$	775,010	$	844,953
Agricultural		97,535		92,583		96,677
Real estate		2,730,585		2,567,878		2,639,346
Consumer		398,945		396,009		372,660
Total loans held-for-investment	$	4,040,952	$	3,831,480	$	3,953,636

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):

	June 30,				December 31,
	2019		2018		2018
Non-accrual loans*	$	26,408	$	26,685	$	27,534
Loans still accruing and past due 90 days or more		300		200		1,008
Troubled debt restructured loans**		471		514		513
Total	$	27,179	$	27,399	$	29,055

* Includes $464,000, $2,813,000 and $827,000 of purchased credit impaired loans as of June 30, 2019 and 2018, and December 31, 2018, respectively.

** Troubled debt restructured loans of $3,906,000, $4,329,000 and $3,840,000, whose interest collection, after considering economic and business conditions and collection efforts, is doubtful are included in non-accrual loans at June 30, 2019 and 2018, and December 31, 2018, respectively.

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):

June 30, 2019				June 30, 2018				December 31, 2018
Recorded Investment		Valuation Allowance		Recorded Investment		Valuation Allowance		Recorded Investment		Valuation Allowance
	$26,408	$	3,866	$	26,685	$	4,823	$	27,534	$	4,069

Schedule of Non-Accrual Loans

Non-accrual loans at June 30, 2019 and 2018, and December 31, 2018, consisted of the following by class of financing receivables (in thousands):

	June 30,				December 31,
	2019		2018		2018
Commercial	$	8,189	$	7,580	$	9,334
Agricultural		1,047		1,259		759
Real estate		16,787		16,715		16,714
Consumer		385		1,131		727
Total	$	26,408	$	26,685	$	27,534

Schedule of Impaired Loans and Related Allowance

The Company’s impaired loans and related allowance are summarized in the following tables by class of financing receivables (in thousands). No interest income was recognized on impaired loans subsequent to their classification as impaired.

June 30, 2019	Unpaid Contractual Principal Balance		Recorded Investment With No Allowance*		Recorded Investment With Allowance		Total Recorded Investment		Related Allowance		Year-to-date Average Recorded Investment		Three- Month Average Recorded Investment
Commercial	$	9,340	$	6,212	$	1,977	$	8,189	$	1,022	$	8,699	$	8,562
Agricultural		1,108		434		613		1,047		119		1,090		1,071
Real Estate		24,262		5,034		11,753		16,787		2,515		18,054		17,105
Consumer		525		27		358		385		210		465		427
Total	$	35,235	$	11,707	$	14,701	$	26,408	$	3,866	$	28,308	$	27,165

* Includes $464,000 of purchased credit impaired loans.

June 30, 2018	Unpaid Contractual Principal Balance		Recorded Investment With No Allowance*		Recorded Investment With Allowance		Total Recorded Investment		Related Allowance		Year-to-date Average Recorded Investment		Three- Month Average Recorded Investment
Commercial	$	9,432	$	3,264	$	4,316	$	7,580	$	1,379	$	8,485	$	8,226
Agricultural		1,278		50		1,209		1,259		368		1,670		1,589
Real Estate		22,358		3,569		13,146		16,715		2,645		18,441		18,019
Consumer		1,344		169		962		1,131		431		1,240		1,192
Total	$	34,412	$	7,052	$	19,633	$	26,685	$	4,823	$	29,836	$	29,026

* Includes $2,813,000 of purchased credit impaired loans.

December 31, 2018	Unpaid Contractual Principal Balance		Recorded Investment With No Allowance*		Recorded Investment With Allowance		Total Recorded Investment		Related Allowance		12 Month Average Recorded Investment
Commercial	$	10,808	$	6,728	$	2,606	$	9,334	$	1,133	$	7,986
Agricultural		799		213		546		759		170		842
Real Estate		24,072		6,699		10,015		16,714		2,409		16,042
Consumer		935		101		626		727		357		914
Total	$	36,614	$	13,741	$	13,793	$	27,534	$	4,069	$	25,784

* Includes $827,000 of purchased credit impaired loans.

Schedule of Internal Ratings of Loans

The following summarizes the Company’s internal ratings of its loans held-for-investment by class of financing receivables and portfolio segments, which are the same (in thousands):

June 30, 2019	Pass		Special Mention		Substandard		Doubtful		Total
Commercial	$	767,275	$	31,124	$	15,488	$	—	$	813,887
Agricultural		94,481		58		2,996		—		97,535
Real Estate		2,656,139		20,044		54,402		—		2,730,585
Consumer		397,017		264		1,664		—		398,945
Total	$	3,914,912	$	51,490	$	74,550	$	—	$	4,040,952
June 30, 2018	Pass		Special Mention		Substandard		Doubtful		Total
Commercial	$	749,387	$	6,439	$	19,184	$	—	$	775,010
Agricultural		87,768		1,568		3,247		—		92,583
Real Estate		2,487,399		26,182		54,297		—		2,567,878
Consumer		393,200		368		2,441		—		396,009
Total	$	3,717,754	$	34,557	$	79,169	$	—	$	3,831,480

December 31, 2018	Pass		Special Mention		Substandard		Doubtful		Total
Commercial	$	804,584	$	23,392	$	16,977	$	—	$	844,953
Agricultural		92,864		46		3,767		—		96,677
Real Estate		2,559,379		26,626		53,341		—		2,639,346
Consumer		370,510		315		1,835		—		372,660
Total	$	3,827,337	$	50,379	$	75,920	$	—	$	3,953,636

Schedule of Past Due Loans

The Company’s past due loans are as follows (in thousands):

June 30, 2019	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	$	2,671	$	352	$	610	$	3,633	$	810,254	$	813,887	$	58
Agricultural		315		163		30		508		97,027		97,535		30
Real Estate		16,130		712		865		17,707		2,712,878		2,730,585		180
Consumer		821		99		40		960		397,985		398,945		32
Total	$	19,937	$	1,326	$	1,545	$	22,808	$	4,018,144	$	4,040,952	$	300
June 30, 2018	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	$	4,950	$	1,085	$	3,029	$	9,064	$	765,946	$	775,010	$	74
Agricultural		626		159		—		785		91,798		92,583		—
Real Estate		13,441		474		532		14,447		2,553,431		2,567,878		70
Consumer		919		232		76		1,227		394,782		396,009		56
Total	$	19,936	$	1,950	$	3,637	$	25,523	$	3,805,957	$	3,831,480	$	200
December 31, 2018	15-59 Days Past Due*		60-89 Days Past Due		Greater Than 90 Days		Total Past Due		Total Current		Total Loans		Total 90 Days  Past Due Still Accruing
Commercial	$	3,546	$	682	$	677	$	4,905	$	840,048	$	844,953	$	—
Agricultural		791		19		26		836		95,841		96,677		—
Real Estate		13,185		881		2,020		16,086		2,623,260		2,639,346		960
Consumer		782		263		54		1,099		371,561		372,660		48
Total	$	18,304	$	1,845	$	2,777	$	22,926	$	3,930,710	$	3,953,636	$	1,008

* 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.

Schedule of Allowance for Loan Losses by Portfolio Segment

The following table details the allowance for loan losses by portfolio segment (in thousands). There were no allowances for purchased credit impaired loans at June 30, 2019 and 2018, and December 31, 2018. Allocation of a portion of the allowance to one category of loans does not preclude its availability to absorb losses in other categories.

June 30, 2019	Commercial		Agricultural		Real Estate		Consumer		Total
Loans individually evaluated for impairment	$	1,022	$	119	$	2,515	$	210	$	3,866
Loans collectively evaluated for impairment		12,877		1,241		28,284		5,552		47,954
Total	$	13,899	$	1,360	$	30,799	$	5,762	$	51,820

June 30, 2018	Commercial		Agricultural		Real Estate		Consumer		Total
Loans individually evaluated for impairment	$	1,379	$	368	$	2,645	$	431	$	4,823
Loans collectively evaluated for impairment		7,839		1,034		30,598		5,657		45,128
Total	$	9,218	$	1,402	$	33,243	$	6,088	$	49,951
December 31, 2018	Commercial		Agricultural		Real Estate		Consumer		Total
Loans individually evaluated for impairment	$	1,133	$	170	$	2,409	$	357	$	4,069
Loans collectively evaluated for impairment		10,815		1,276		29,933		5,109		47,133
Total	$	11,948	$	1,446	$	32,342	$	5,466	$	51,202

Changes in Allowance for Loan Losses

Changes in the allowance for loan losses are summarized as follows by portfolio segment (in thousands):

Three months ended June 30, 2019	Commercial			Agricultural			Real Estate			Consumer			Total
Beginning balance	$	12,475		$	1,430		$	31,887		$	5,793		$	51,585
Provision for loan losses		1,418			61			(929	)		50			600
Recoveries		423			5			60			209			697
Charge-offs		(417	)		(136	)		(219	)		(290	)		(1,062	)
Ending balance	$	13,899		$	1,360		$	30,799		$	5,762		$	51,820
Three months ended June 30, 2018	Commercial			Agricultural			Real Estate			Consumer			Total
Beginning balance	$	9,277		$	1,512		$	32,539		$	6,171		$	49,499
Provision for loan losses		335			(115	)		799			86			1,105
Recoveries		126			5			18			147			296
Charge-offs		(520	)		—			(113	)		(316	)		(949	)
Ending balance	$	9,218		$	1,402		$	33,243		$	6,088		$	49,951
Six months ended June 30, 2019	Commercial			Agricultural			Real Estate			Consumer			Total
Beginning balance	$	11,948		$	1,446		$	32,342		$	5,466		$	51,202
Provision for loan losses		1,612			42			(531	)		442			1,565
Recoveries		1,073			7			149			349			1,578
Charge-offs		(734	)		(135	)		(1,161	)		(495	)		(2,525	)
Ending balance	$	13,899		$	1,360		$	30,799		$	5,762		$	51,820
Six months ended June 30, 2018	Commercial			Agricultural			Real Estate			Consumer			Total
Beginning balance	$	10,865		$	1,305		$	29,896		$	6,090		$	48,156
Provision for loan losses		(1,292	)		88			3,233			386			2,415
Recoveries		284			9			260			247			800
Charge-offs		(639	)		—			(146	)		(635	)		(1,420	)
Ending balance	$	9,218		$	1,402		$	33,243		$	6,088		$	49,951

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 related to the balance in the allowance for loan losses on the basis of the Company’s impairment methodology is as follows (in thousands). Purchased credit impaired loans of $464,000, $2,813,000 and $827,000 at June 30, 2019 and 2018, and December 31, 2018, respectively, are included in loans individually evaluated for impairment.

June 30, 2019	Commercial		Agricultural		Real Estate		Consumer		Total
Loans individually evaluated for impairment	$	8,189	$	1,047	$	16,787	$	385	$	26,408
Loans collectively evaluated for impairment		805,698		96,488		2,713,798		398,560		4,014,544
Total	$	813,887	$	97,535	$	2,730,585	$	398,945	$	4,040,952

June 30, 2018	Commercial		Agricultural		Real Estate		Consumer		Total
Loans individually evaluated for impairment	$	7,580	$	1,259	$	16,715	$	1,131	$	26,685
Loans collectively evaluated for impairment		767,430		91,324		2,551,163		394,878		3,804,795
Total	$	775,010	$	92,583	$	2,567,878	$	396,009	$	3,831,480

December 31, 2018	Commercial		Agricultural		Real Estate		Consumer		Total
Loans individually evaluated for impairment	$	9,334	$	759	$	16,714	$	727	$	27,534
Loan collectively evaluated for impairment		835,619		95,918		2,622,632		371,933		3,926,102
Total	$	844,953	$	96,677	$	2,639,346	$	372,660	$	3,953,636

Schedule of Loans Modified and Considered Troubled Debt Restructurings

The Company’s loans that were modified and considered troubled debt restructurings are as follows (in thousands):

	Three Months Ended June 30, 2019						Six Months Ended June 30, 2019
	Number		Pre- Modification Recorded Investment		Post- Modification Recorded Investment		Number		Pre- Modification Recorded Investment		Post- Modification Recorded Investment
Commercial		2	$	122	$	122		3	$	279	$	279
Agricultural		2		253		253		10		619		619
Real Estate		—		—		—		4		650		650
Consumer		—		—		—		—		—		—
Total		4	$	375	$	375		17	$	1,548	$	1,548

	Three Months Ended June 30, 2018						Six Months Ended June 30, 2018
	Number		Pre- Modification Recorded Investment		Post- Modification Recorded Investment		Number		Pre- Modification Recorded Investment		Post- Modification Recorded Investment
Commercial		1	$	279	$	279		1	$	279	$	279
Agricultural		—		—		—		1		4		4
Real Estate		2		162		162		4		525		525
Consumer		3		39		39		6		113		113
Total		6	$	480	$	480		12	$	921	$	921

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 (in thousands):

	Three Months Ended June 30, 2019						Six Months Ended June 30, 2019
	Adjusted Interest Rate		Extended Maturity		Combined Rate and Maturity		Adjusted Interest Rate		Extended Maturity		Combined Rate and Maturity
Commercial	$	—	$	122	$	—	$	—	$	279	$	—
Agricultural		—		253		—		—		354		265
Real Estate		—		—		—		—		202		448
Consumer		—		—		—		—		—		—
Total	$	—	$	375	$	—	$	—	$	835	$	713

	Three Months Ended June 30, 2018						Six Months Ended June 30, 2018
	Adjusted Interest Rate		Extended Maturity		Combined Rate and Maturity		Adjusted Interest Rate		Extended Maturity		Combined Rate and Maturity
Commercial	$	—	$	—	$	279		—	$	—	$	279
Agricultural		—		—		—		—		—		4
Real Estate		—		162		—		—		162		363
Consumer		—		—		39		—		—		113
Total	$	—	$	162	$	318		—	$	162	$	759

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Derivative Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2019

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Summary of Outstanding Notional Balances and Fair Values of Outstanding Derivative Positions

The following table provides the outstanding notional balances and fair values of outstanding derivative positions (dollars in thousands):

June 30, 2019:	Outstanding Notional Balance		Asset Derivative Fair Value		Liability Derivative Fair Value
IRLCs	$	89,655	$	1,525	$	—
Forward mortgage-backed securities trades		72,500		—		254

June 30, 2018:	Outstanding Notional Balance		Asset Derivative Fair Value		Liability Derivative Fair Value
IRLCs	$	61,520	$	501	$	—
Forward mortgage-backed securities trades		17,500		—		47

December 31, 2018:	Outstanding Notional Balance		Asset Derivative Fair Value		Liability Derivative Fair Value
IRLCs	$	37,088	$	765	$	—
Forward mortgage-backed securities trades		45,500		—		403

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Borrowings (Tables)

6 Months Ended

Jun. 30, 2019

Debt Disclosure [Abstract]

Schedule of Borrowings

Borrowings consisted of the following (dollars in thousands):

	June 30,				December 31,
	2019		2018		2018
Securities sold under agreements with customers to repurchase	$	356,555	$	389,010	$	409,631
Federal funds purchased		5,450		7,925		4,075
Advances from Federal Home Loan Bank of Dallas		—		60,000		55,000
Total	$	362,005	$	456,935	$	468,706

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Fair Value Disclosures (Tables)

6 Months Ended

Jun. 30, 2019

Fair Value Disclosures [Abstract]

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

The following table summarizes the Company’s available-for-sale securities which are measured at fair value on a recurring basis, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value (dollars in thousands):

June 30, 2019	Level 1 Inputs		Level 2 Inputs		Level 3 Inputs		Total Fair Value
Available-for-sale investment securities:
U.S. Treasury securities	$	10,020	$	—	$	—	$	10,020
Obligations of states and political subdivisions		—		1,157,214		—		1,157,214
Corporate bonds		—		228		—		228
Residential mortgage-backed securities		—		1,596,175		—		1,596,175
Commercial mortgage-backed securities		—		491,389		—		491,389
Other securities		4,466		—		—		4,466
Total	$	14,486	$	3,245,006	$	—	$	3,259,492
Loans held-for-sale	$	—	$	18,981	$	—	$	18,981
IRLCs	$	—	$	1,525	$	—	$	1,525
Forward mortgage-backed securities trades	$	—	$	254	$	—	$	254

June 30, 2018	Level 1 Inputs		Level 2 Inputs		Level 3 Inputs		Total Fair Value
Available-for-sale investment securities:
U.S. Treasury securities	$	9,965	$	—	$	—	$	9,965
Obligations of U. S. government sponsored enterprises and agencies		—		303		—		303
Obligations of states and political subdivisions		—		1,284,775		—		1,284,775
Corporate bonds		—		451		—		451
Residential mortgage-backed securities		—		1,435,257		—		1,435,257
Commercial mortgage-backed securities		—		462,485		—		462,485
Other securities		4,331		—		—		4,331
Total	$	14,296	$	3,183,271	$	—	$	3,197,567
Loans held-for-sale	$	—	$	5,061	$	—	$	5,061
IRLCs	$	—	$	501	$	—	$	501
Forward mortgage-backed securities trades	$	—	$	47	$	—	$	47

  

December 31, 2018	Level 1 Inputs		Level 2 Inputs		Level 3 Inputs		Total Fair Value
Available-for-sale investment securities:
U.S. Treasury securities	$	9,962	$	—	$	—	$	9,962
Obligations of U. S. government sponsored enterprises and agencies		—		301		—		301
Obligations of states and political subdivisions		—		1,257,871		—		1,257,871
Corporate bonds		—		450		—		450
Residential mortgage-backed securities		—		1,454,545		—		1,454,545
Commercial mortgage-backed securities		—		431,300		—		431,300
Other securities		4,348		—		—		4,348
Total	$	14,310	$	3,144,467	$	—	$	3,158,777
Loans held-for-sale	$	—	$	19,185	$	—	$	19,185
IRLCs	$	—	$	765	$	—	$	765
Forward mortgage-backed securities trades	$	—	$	403	$	—	$	403

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 June 30,
	2019		2018
Carrying value of other real estate owned prior to re-measurement	$	—	$	526
Write-downs included in gain (loss) on sale of other real estate owned		—		(126	)
Fair value	$	—	$	400
	Six Months Ended June 30,
	2019		2018
Carrying value of other real estate owned prior to re-measurement	$	—	$	526
Write-downs included in gain (loss) on sale of other real estate owned		—		(126	)
Fair value	$	—	$	400

Schedule of Estimated Fair Values and Carrying Values of All Financial Instruments

The estimated fair values and carrying values of all financial instruments under current authoritative guidance were as follows (in thousands).

	June 30,								December 31,
	2019				2018				2018
	Carrying Value		Estimated Fair Value		Carrying Value		Estimated Fair Value		Carrying Value		Estimated Fair Value		Fair Value Hierarchy
Cash and due from banks	$	178,345	$	178,345	$	178,217	$	178,217	$	207,835	$	207,835		Level 1
Federal funds sold		700		700		8,450		8,450		—		—		Level 1
Interest-bearing deposits in banks		128,652		128,652		99,499		99,499		40,812		40,812		Level 1
Interest-bearing time deposits in banks		960		960		1,458		1,458		1,458		1,458		Level 2
Available-for-sale securities		3,259,492		3,259,492		3,197,567		3,197,567		3,158,777		3,158,777		Levels 1 and 2
Loans held for investment		3,989,132		4,026,543		3,781,529		3,807,267		3,902,434		3,947,391		Level 3
Loans held for sale		22,305		22,347		24,289		24,550		21,672		21,779		Level 2
Accrued interest receivable		36,954		36,954		36,513		36,513		36,765		36,765		Level 2
Deposits with stated maturities		433,511		433,811		483,230		484,230		442,161		441,727		Level 2
Deposits with no stated maturities		5,936,255		5,936,255		5,727,377		5,727,377		5,738,228		5,738,228		Level 1
Borrowings		362,005		362,005		456,935		456,935		468,706		468,706		Level 2
Accrued interest payable		694		694		223		223		408		408		Level 2
IRLCs		1,525		1,525		501		501		765		765		Level 2
Forward mortgage backed securities trades		254		254		47		47		403		403		Level 2

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Acquisition (Tables)

6 Months Ended

Jun. 30, 2019

Schedule of Preliminary Estimated Fair Value Amounts Assigned to Major Asset and Liability Categories at Acquisition Date

The following table presents the amounts recorded on the consolidated balance sheet on the acquisition date (dollars in thousands):

Fair value of consideration paid:
Common stock issued (1,289,371 shares)	$	58,087
Fair value of identifiable assets acquired:
Cash and cash equivalents		18,653
Securities available-for-sale		64,501
Loans		266,327
Identifiable intangible assets		3,167
Other assets		15,375
Total identifiable assets acquired		368,023
Fair value of liabilities assumed:
Deposits		341,902
Other liabilities		(373	)
Total liabilities assumed		341,529
Fair value of net identifiable assets acquired		26,494
Goodwill resulting from acquisition	$	31,593

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Stock Split and Stock Repurchase - Additional Information (Detail) - shares		6 Months Ended
	Apr. 23, 2019	Jun. 30, 2019	Jul. 25, 2017
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program expiration date		Sep. 30, 2020
Minimum number of shares that company is required to repurchase		0
Stock repurchased under authorization		0
Dividends Common Stock Percentage of Stock Dividend	100.00%
Stockholders' Equity Note, Stock Split	two-for-one stock split
Dividends Payable, Date of Record	May 15, 2019
Dividends Payable, Date to be Paid	Jun. 03, 2019
Maximum [Member]
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, number of shares authorized to be repurchased			2,000,000

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Earnings Per Share - Additional Information (Detail) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Share [Abstract]
Weighted average common shares outstanding, basic	135,650,599	135,194,550	135,572,859	135,124,672
Weighted average common shares outstanding, diluted	136,218,235	135,848,336	136,195,811	135,735,930

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Interest-bearing Time Deposits in Banks and Securities - Additional Information (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($) Investment	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) Investment	Jun. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)
Interest Bearing Time Deposits In Banks And Securities [Line Items]
INTEREST-BEARING TIME DEPOSITS IN BANKS	$ 960,000	$ 1,458,000	$ 960,000	$ 1,458,000	$ 1,458,000
Interest-bearing time deposits, maturity period, years			1 month
Number of investment positions | Investment	109		109
Securities pledged as collateral	$ 2,137,620,000		$ 2,137,620,000
Sales of investment securities available-for-sale	65,821,000	57,680,000	66,052,000	149,125,000
Gross realized gains from security sales	689,000	287,000	693,000	1,529,000
Gross realized losses from security sales or calls	$ 13,000	$ 220,000	$ 17,000	$ 241,000
Maximum [Member]
Interest Bearing Time Deposits In Banks And Securities [Line Items]
Interest-bearing time deposits, maturity period, years			3 months
Obligations of State and Political Subdivisions [Member] | Texas [Member]
Interest Bearing Time Deposits In Banks And Securities [Line Items]
Percentage of securities guaranteed by Texas Permanent School Fund	33.55%		33.55%
Obligations of State and Political Subdivisions [Member] | Texas [Member] | Available-for-Sale Securities [Member] | Geographic Concentration Risk [Member]
Interest Bearing Time Deposits In Banks And Securities [Line Items]
Concentration risk, percentage			84.95%

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Interest-bearing Time Deposits in Banks and Securities - Summary of Available-for-Sale Securities (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Schedule of Available-for-sale Securities [Line Items]
Available-for-Sale, Amortized Cost Basis, Total	$ 3,182,772	$ 3,153,568	$ 3,208,412
Securities available-for-sale, Gross Unrealized Holding Gains	80,341	34,611	31,562
Securities available-for-sale, Gross Unrealized Holding Losses	(3,621)	(29,402)	(42,407)
Securities available-for-sale, Estimated Fair Value	3,259,492	3,158,777	3,197,567
U.S. Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-Sale, Amortized Cost Basis, Total	9,984	9,970	9,957
Securities available-for-sale, Gross Unrealized Holding Gains	36		8
Securities available-for-sale, Gross Unrealized Holding Losses		(8)
Securities available-for-sale, Estimated Fair Value	10,020	9,962	9,965
Obligations of U.S. Government Sponsored Enterprises and Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-Sale, Amortized Cost Basis, Total		301	304
Securities available-for-sale, Gross Unrealized Holding Losses			(1)
Securities available-for-sale, Estimated Fair Value		301	303
Obligations of State and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-Sale, Amortized Cost Basis, Total	1,103,682	1,229,828	1,257,547
Securities available-for-sale, Gross Unrealized Holding Gains	53,593	30,013	29,924
Securities available-for-sale, Gross Unrealized Holding Losses	(61)	(1,970)	(2,696)
Securities available-for-sale, Estimated Fair Value	1,157,214	1,257,871	1,284,775
Corporate Bonds and Other [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-Sale, Amortized Cost Basis, Total	4,643	4,875	4,861
Securities available-for-sale, Gross Unrealized Holding Gains	51
Securities available-for-sale, Gross Unrealized Holding Losses		(77)	(79)
Securities available-for-sale, Estimated Fair Value	4,694	4,798	4,782
Residential Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-Sale, Amortized Cost Basis, Total	1,579,544	1,472,228	1,464,345
Securities available-for-sale, Gross Unrealized Holding Gains	19,732	3,928	1,630
Securities available-for-sale, Gross Unrealized Holding Losses	(3,101)	(21,611)	(30,718)
Securities available-for-sale, Estimated Fair Value	1,596,175	1,454,545	1,435,257
Commercial Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-Sale, Amortized Cost Basis, Total	484,919	436,366	471,398
Securities available-for-sale, Gross Unrealized Holding Gains	6,929	670	0
Securities available-for-sale, Gross Unrealized Holding Losses	(459)	(5,736)	(8,913)
Securities available-for-sale, Estimated Fair Value	$ 491,389	$ 431,300	$ 462,485

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Interest-bearing Time Deposits in Banks and Securities - Amortized Cost and Estimated Fair Value of Available-for-Sale Securities (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Investments, Debt and Equity Securities [Abstract]
Available-for-Sale, Amortized Cost Basis, Due within one year	$ 165,912
Available-for-Sale, Amortized Cost Basis, Due after one year through five years	483,916
Available-for-Sale, Amortized Cost Basis, Due after five years through ten years	466,755
Available-for-Sale, Amortized Cost Basis, Due after ten years	1,726
Available-for-Sale, Amortized Cost Basis, Mortgage-backed securities	2,064,463
Available-for-Sale, Amortized Cost Basis, Total	3,182,772	$ 3,153,568	$ 3,208,412
Available-for-Sale, Estimated Fair Value, Due within one year	167,217
Available-for-Sale, Estimated Fair Value, Due after one year through five years	506,941
Available-for-Sale, Estimated Fair Value, Due after five years through ten years	495,582
Available-for-Sale, Estimated Fair Value, Due after ten years	2,188
Available-for-Sale, Estimated Fair Value, Mortgage-backed securities	2,087,564
Securities available-for-sale, Estimated Fair Value, Total	$ 3,259,492	$ 3,158,777	$ 3,197,567

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Interest-bearing Time Deposits in Banks and Securities - Continuous Unrealized-Loss Position of Available-for-Sale Securities (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, continuous unrealized loss position Less than 12 Months, Fair Value	$ 17,594	$ 163,377	$ 1,594,398
Available-for-sale securities, continuous unrealized loss position Less than 12 Months, Unrealized Loss	77	671	30,514
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Fair Value	549,604	1,380,516	353,912
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Unrealized Loss	3,544	28,731	11,893
Available-for-sale securities, continuous unrealized loss position, Fair Value	567,198	1,543,893	1,948,310
Available-for-sale securities, continuous unrealized loss position, Unrealized Loss	3,621	29,402	42,407
Obligations of U.S. Government Sponsored Enterprises and Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, continuous unrealized loss position Less than 12 Months, Fair Value			303
Available-for-sale securities, continuous unrealized loss position Less than 12 Months, Unrealized Loss			1
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Fair Value		301
Available-for-sale securities, continuous unrealized loss position, Fair Value		301	303
Available-for-sale securities, continuous unrealized loss position, Unrealized Loss			1
Obligations of State and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, continuous unrealized loss position Less than 12 Months, Fair Value		27,489	136,950
Available-for-sale securities, continuous unrealized loss position Less than 12 Months, Unrealized Loss		107	1,122
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Fair Value	9,777	114,461	43,239
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Unrealized Loss	61	1,863	1,574
Available-for-sale securities, continuous unrealized loss position, Fair Value	9,777	141,950	180,189
Available-for-sale securities, continuous unrealized loss position, Unrealized Loss	61	1,970	2,696
Corporate Bonds and Other [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, continuous unrealized loss position Less than 12 Months, Fair Value		4,348	4,617
Available-for-sale securities, continuous unrealized loss position Less than 12 Months, Unrealized Loss		68	76
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Fair Value		450	233
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Unrealized Loss		9	3
Available-for-sale securities, continuous unrealized loss position, Fair Value		4,798	4,850
Available-for-sale securities, continuous unrealized loss position, Unrealized Loss		77	79
Residential Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, continuous unrealized loss position Less than 12 Months, Fair Value	17,594	119,584	1,073,327
Available-for-sale securities, continuous unrealized loss position Less than 12 Months, Unrealized Loss	77	483	21,838
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Fair Value	404,946	922,289	227,155
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Unrealized Loss	3,024	21,128	8,880
Available-for-sale securities, continuous unrealized loss position, Fair Value	422,540	1,041,873	1,300,482
Available-for-sale securities, continuous unrealized loss position, Unrealized Loss	3,101	21,611	30,718
Commercial Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, continuous unrealized loss position Less than 12 Months, Fair Value		1,994	379,201
Available-for-sale securities, continuous unrealized loss position Less than 12 Months, Unrealized Loss		5	7,477
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Fair Value	134,881	343,015	83,285
Available-for-sale securities, continuous unrealized loss position 12 Months or Longer, Unrealized Loss	459	5,731	1,436
Available-for-sale securities, continuous unrealized loss position, Fair Value	134,881	345,009	462,486
Available-for-sale securities, continuous unrealized loss position, Unrealized Loss	$ 459	5,736	$ 8,913
U.S. Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, continuous unrealized loss position Less than 12 Months, Fair Value		9,962
Available-for-sale securities, continuous unrealized loss position Less than 12 Months, Unrealized Loss		8
Available-for-sale securities, continuous unrealized loss position, Fair Value		9,962
Available-for-sale securities, continuous unrealized loss position, Unrealized Loss		$ 8

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Loans Held for Investment and Allowance for Loan Losses - Loans Held-for-Investment by Class of Financing Receivables (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Loans and Leases Receivable Disclosure [Line Items]
Total	$ 4,040,952	$ 3,953,636	$ 3,831,480
Commercial [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total	813,887	844,953	775,010
Agriculture [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total	97,535	96,677	92,583
Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total	2,730,585	2,639,346	2,567,878
Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total	$ 398,945	$ 372,660	$ 396,009

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Loans Held for Investment 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		Jul. 30, 2019	Jun. 30, 2019		Dec. 31, 2018		Jun. 30, 2018
Receivables [Abstract]
Non-accrual loans		$ 26,408	$ 26,408	[1]	$ 27,534	[1]	$ 26,685	[1]
Loans still accruing and past due 90 days or more			300		1,008		200
Troubled debt restructured loans	[2]		471		513		514
Total			$ 27,179		$ 29,055		$ 27,399

[1] Includes $464,000, $2,813,000 and $827,000 of purchased credit impaired loans as of June 30, 2019 and 2018, and December 31, 2018, respectively.

[2] Troubled debt restructured loans of $3,906,000, $4,329,000 and $3,840,000, whose interest collection, after considering economic and business conditions and collection efforts, is doubtful are included in non-accrual loans at June 30, 2019 and 2018, and December 31, 2018, respectively.

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Loans Held for Investment and Allowance for Loan Losses - Non-Accrual Loans, Loans Still Accruing and Past Due 90 Days or More and Restructured Loans (Parenthetical) (Detail) - USD ($)		Jul. 30, 2019	Jun. 30, 2019		Dec. 31, 2018		Jun. 30, 2018
Loans and Leases Receivable Disclosure [Line Items]
Non-accrual loans		$ 26,408,000	$ 26,408,000	[1]	$ 27,534,000	[1]	$ 26,685,000	[1]
Troubled debt restructured loans	[2]		471,000		513,000		514,000
Doubtful [Member]
Loans and Leases Receivable Disclosure [Line Items]
Troubled debt restructured loans			3,906,000		3,840,000		4,329,000
Purchased Credit Impaired Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Non-accrual loans			$ 464,000		$ 827,000		$ 2,813,000

[1] Includes $464,000, $2,813,000 and $827,000 of purchased credit impaired loans as of June 30, 2019 and 2018, and December 31, 2018, respectively.

[2] Troubled debt restructured loans of $3,906,000, $4,329,000 and $3,840,000, whose interest collection, after considering economic and business conditions and collection efforts, is doubtful are included in non-accrual loans at June 30, 2019 and 2018, and December 31, 2018, respectively.

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Loans Held for Investment and Allowance for Loan Losses - Recorded Investment in Impaired Loans and Related Valuation Allowance (Detail) - USD ($) $ in Thousands	Jul. 30, 2019	Jun. 30, 2019		Dec. 31, 2018		Jun. 30, 2018
Receivables [Abstract]
Recorded Investment	$ 26,408	$ 26,408	[1]	$ 27,534	[1]	$ 26,685	[1]
Valuation Allowance		$ 3,866		$ 4,069		$ 4,823

[1] Includes $464,000, $2,813,000 and $827,000 of purchased credit impaired loans as of June 30, 2019 and 2018, and December 31, 2018, respectively.

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Loans Held for Investment and Allowance for Loan Losses - Additional Information (Detail) - USD ($)	3 Months Ended		12 Months Ended
	Jun. 30, 2019		Dec. 31, 2018		Jul. 30, 2019	Mar. 31, 2019	Jun. 30, 2018		Mar. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual, past due 90 days or more and still accruing, restructured loans and foreclosed assets	$ 27,860,000		$ 29,632,000				$ 28,104,000
Non accrual loans	26,408,000	[1]	27,534,000	[1]	$ 26,408,000		26,685,000	[1]
Additional funds advanced in connection with impaired loans	0
Interest income recognized on impaired loans			948,000
Allowance for loan losses	51,820,000		51,202,000			$ 51,585,000	49,951,000		$ 49,499,000	$ 48,156,000
Loans individually evaluated for impairment	$ 26,408,000		27,534,000				26,685,000
Default for purposes of this disclosure is a troubled debt restructured loan	90 days
Commitments to lend additional funds to borrowers with loan that have been modified as TDRs	$ 0
Loans held by subsidiaries subject to blanket liens	2,563,225,000
Impaired Financing Receivable, Unpaid Principal Balance	35,235,000		36,614,000				34,412,000
Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non accrual loans	464,000		827,000				2,813,000
Allowance for loan losses	0		0				0
Loans individually evaluated for impairment	464,000		827,000				2,813,000
Impaired Financing Receivable, Unpaid Principal Balance	$ 750,000		$ 1,157,000				$ 3,918,000

[1] Includes $464,000, $2,813,000 and $827,000 of purchased credit impaired loans as of June 30, 2019 and 2018, and December 31, 2018, respectively.

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Loans Held for Investment and Allowance for Loan Losses - Schedule of Non-Accrual Loans (Detail) - USD ($) $ in Thousands	Jul. 30, 2019	Jun. 30, 2019		Dec. 31, 2018		Jun. 30, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	$ 26,408	$ 26,408	[1]	$ 27,534	[1]	$ 26,685	[1]
Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans		8,189		9,334		7,580
Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans		1,047		759		1,259
Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans		16,787		16,714		16,715
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans		$ 385		$ 727		$ 1,131

[1] Includes $464,000, $2,813,000 and $827,000 of purchased credit impaired loans as of June 30, 2019 and 2018, and December 31, 2018, respectively.

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Loans Held for Investment and Allowance for Loan Losses - Schedule of Impaired Loans and Related Allowance (Detail) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended				12 Months Ended
	Jun. 30, 2019		Jun. 30, 2018		Jun. 30, 2019		Jun. 30, 2018		Dec. 31, 2018
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	$ 35,235		$ 34,412		$ 35,235		$ 34,412		$ 36,614
Recorded Investment With No Allowance	11,707	[1]	7,052	[2]	11,707	[1]	7,052	[2]	13,741	[3]
Recorded Investment With Allowance	14,701		19,633		14,701		19,633		13,793
Total Recorded Investment	26,408		26,685		26,408		26,685		27,534
Related Allowance	3,866		4,823		3,866		4,823		4,069
Average Recorded Investment	27,165		29,026		28,308		29,836		25,784
Commercial [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	9,340		9,432		9,340		9,432		10,808
Recorded Investment With No Allowance	6,212	[1]	3,264	[2]	6,212	[1]	3,264	[2]	6,728	[3]
Recorded Investment With Allowance	1,977		4,316		1,977		4,316		2,606
Total Recorded Investment	8,189		7,580		8,189		7,580		9,334
Related Allowance	1,022		1,379		1,022		1,379		1,133
Average Recorded Investment	8,562		8,226		8,699		8,485		7,986
Agriculture [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	1,108		1,278		1,108		1,278		799
Recorded Investment With No Allowance	434	[1]	50	[2]	434	[1]	50	[2]	213	[3]
Recorded Investment With Allowance	613		1,209		613		1,209		546
Total Recorded Investment	1,047		1,259		1,047		1,259		759
Related Allowance	119		368		119		368		170
Average Recorded Investment	1,071		1,589		1,090		1,670		842
Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	24,262		22,358		24,262		22,358		24,072
Recorded Investment With No Allowance	5,034	[1]	3,569	[2]	5,034	[1]	3,569	[2]	6,699	[3]
Recorded Investment With Allowance	11,753		13,146		11,753		13,146		10,015
Total Recorded Investment	16,787		16,715		16,787		16,715		16,714
Related Allowance	2,515		2,645		2,515		2,645		2,409
Average Recorded Investment	17,105		18,019		18,054		18,441		16,042
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	525		1,344		525		1,344		935
Recorded Investment With No Allowance	27	[1]	169	[2]	27	[1]	169	[2]	101	[3]
Recorded Investment With Allowance	358		962		358		962		626
Total Recorded Investment	385		1,131		385		1,131		727
Related Allowance	210		431		210		431		357
Average Recorded Investment	$ 427		$ 1,192		$ 465		$ 1,240		$ 914

[1] Includes $464,000 of purchased credit impaired loans.

[2] Includes $2,813,000 of purchased credit impaired loans.

[3] Includes $827,000 of purchased credit impaired loans.

XML

Loans Held for Investment and Allowance for Loan Losses - Schedule of Impaired Loans and Related Allowance (Parenthetical) (Detail) - USD ($) $ in Thousands	Jun. 30, 2019		Dec. 31, 2018		Jun. 30, 2018
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance	$ 11,707	[1]	$ 13,741	[2]	$ 7,052	[3]
Purchased Credit Impaired Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance	$ 464		$ 827		$ 2,813

[1] Includes $464,000 of purchased credit impaired loans.

[2] Includes $827,000 of purchased credit impaired loans.

[3] Includes $2,813,000 of purchased credit impaired loans.

XML

Loans Held for Investment and Allowance for Loan Losses - Schedule of Internal Ratings of Loans (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Financing Receivable, Recorded Investment [Line Items]
Internal ratings of loan	$ 4,040,952	$ 3,953,636	$ 3,831,480
Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Internal ratings of loan	813,887	844,953	775,010
Agriculture [Member]
Financing Receivable, Recorded Investment [Line Items]
Internal ratings of loan	97,535	96,677	92,583
Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Internal ratings of loan	2,730,585	2,639,346	2,567,878
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Internal ratings of loan	398,945	372,660	396,009
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Internal ratings of loan	3,914,912	3,827,337	3,717,754
Pass [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Internal ratings of loan	767,275	804,584	749,387
Pass [Member] | Agriculture [Member]
Financing Receivable, Recorded Investment [Line Items]
Internal ratings of loan	94,481	92,864	87,768
Pass [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Internal ratings of loan	2,656,139	2,559,379	2,487,399
Pass [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Internal ratings of loan	397,017	370,510	393,200
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Internal ratings of loan	51,490	50,379	34,557
Special Mention [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Internal ratings of loan	31,124	23,392	6,439
Special Mention [Member] | Agriculture [Member]
Financing Receivable, Recorded Investment [Line Items]
Internal ratings of loan	58	46	1,568
Special Mention [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Internal ratings of loan	20,044	26,626	26,182
Special Mention [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Internal ratings of loan	264	315	368
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Internal ratings of loan	74,550	75,920	79,169
Substandard [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Internal ratings of loan	15,488	16,977	19,184
Substandard [Member] | Agriculture [Member]
Financing Receivable, Recorded Investment [Line Items]
Internal ratings of loan	2,996	3,767	3,247
Substandard [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Internal ratings of loan	54,402	53,341	54,297
Substandard [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Internal ratings of loan	$ 1,664	$ 1,835	$ 2,441

XML

Loans Held for Investment and Allowance for Loan Losses - Schedule of Past Due Loans (Detail) - USD ($) $ in Thousands		Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		$ 22,808	$ 22,926	$ 25,523
Total Current		4,018,144	3,930,710	3,805,957
Total Loans		4,040,952	3,953,636	3,831,480
Total 90 Days Past Due Still Accruing		300	1,008	200
Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		3,633	4,905	9,064
Total Current		810,254	840,048	765,946
Total Loans		813,887	844,953	775,010
Total 90 Days Past Due Still Accruing		58		74
Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		508	836	785
Total Current		97,027	95,841	91,798
Total Loans		97,535	96,677	92,583
Total 90 Days Past Due Still Accruing		30
Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		17,707	16,086	14,447
Total Current		2,712,878	2,623,260	2,553,431
Total Loans		2,730,585	2,639,346	2,567,878
Total 90 Days Past Due Still Accruing		180	960	70
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		960	1,099	1,227
Total Current		397,985	371,561	394,782
Total Loans		398,945	372,660	396,009
Total 90 Days Past Due Still Accruing		32	48	56
15-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	[1]	19,937	18,304	19,936
15-59 Days Past Due [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	[1]	2,671	3,546	4,950
15-59 Days Past Due [Member] | Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	[1]	315	791	626
15-59 Days Past Due [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	[1]	16,130	13,185	13,441
15-59 Days Past Due [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	[1]	821	782	919
60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		1,326	1,845	1,950
60-89 Days Past Due [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		352	682	1,085
60-89 Days Past Due [Member] | Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		163	19	159
60-89 Days Past Due [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		712	881	474
60-89 Days Past Due [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		99	263	232
Greater than 90 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		1,545	2,777	3,637
Greater than 90 Days [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		610	677	3,029
Greater than 90 Days [Member] | Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		30	26
Greater than 90 Days [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		865	2,020	532
Greater than 90 Days [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		$ 40	$ 54	$ 76

[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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Loans Held for Investment and Allowance for Loan Losses - Schedule of Allowance for Loan Losses by Portfolio Segment (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment	$ 3,866		$ 4,069	$ 4,823
Loans collectively evaluated for impairment	47,954		47,133	45,128
Total allowance for loan losses	51,820	$ 51,585	51,202	49,951	$ 49,499	$ 48,156
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment	1,022		1,133	1,379
Loans collectively evaluated for impairment	12,877		10,815	7,839
Total allowance for loan losses	13,899	12,475	11,948	9,218	9,277	10,865
Agriculture [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment	119		170	368
Loans collectively evaluated for impairment	1,241		1,276	1,034
Total allowance for loan losses	1,360	1,430	1,446	1,402	1,512	1,305
Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment	2,515		2,409	2,645
Loans collectively evaluated for impairment	28,284		29,933	30,598
Total allowance for loan losses	30,799	31,887	32,342	33,243	32,539	29,896
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment	210		357	431
Loans collectively evaluated for impairment	5,552		5,109	5,657
Total allowance for loan losses	$ 5,762	$ 5,793	$ 5,466	$ 6,088	$ 6,171	$ 6,090

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Loans Held for Investment and Allowance for Loan Losses - Changes in Allowance for Loan Losses (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	$ 51,585	$ 49,499	$ 51,202	$ 48,156
Provision for loan losses	600	1,105	1,565	2,415
Recoveries	697	296	1,578	800
Charge-offs	(1,062)	(949)	(2,525)	(1,420)
Ending balance	51,820	49,951	51,820	49,951
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	12,475	9,277	11,948	10,865
Provision for loan losses	1,418	335	1,612	(1,292)
Recoveries	423	126	1,073	284
Charge-offs	(417)	(520)	(734)	(639)
Ending balance	13,899	9,218	13,899	9,218
Agriculture [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	1,430	1,512	1,446	1,305
Provision for loan losses	61	(115)	42	88
Recoveries	5	5	7	9
Charge-offs	(136)		(135)
Ending balance	1,360	1,402	1,360	1,402
Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	31,887	32,539	32,342	29,896
Provision for loan losses	(929)	799	(531)	3,233
Recoveries	60	18	149	260
Charge-offs	(219)	(113)	(1,161)	(146)
Ending balance	30,799	33,243	30,799	33,243
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	5,793	6,171	5,466	6,090
Provision for loan losses	50	86	442	386
Recoveries	209	147	349	247
Charge-offs	(290)	(316)	(495)	(635)
Ending balance	$ 5,762	$ 6,088	$ 5,762	$ 6,088

XML

Loans Held for Investment 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	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment	$ 26,408	$ 27,534	$ 26,685
Loan collectively evaluated for impairment	4,014,544	3,926,102	3,804,795
Total	4,040,952	3,953,636	3,831,480
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment	8,189	9,334	7,580
Loan collectively evaluated for impairment	805,698	835,619	767,430
Total	813,887	844,953	775,010
Agriculture [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment	1,047	759	1,259
Loan collectively evaluated for impairment	96,488	95,918	91,324
Total	97,535	96,677	92,583
Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment	16,787	16,714	16,715
Loan collectively evaluated for impairment	2,713,798	2,622,632	2,551,163
Total	2,730,585	2,639,346	2,567,878
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment	385	727	1,131
Loan collectively evaluated for impairment	398,560	371,933	394,878
Total	$ 398,945	$ 372,660	$ 396,009

XML

Loans Held for Investment and Allowance for Loan Losses - Schedule of Loans Modified and Considered Troubled Debt Restructurings (Detail) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($) SecurityLoan	Jun. 30, 2018 USD ($) SecurityLoan	Jun. 30, 2019 USD ($) SecurityLoan	Jun. 30, 2018 USD ($) SecurityLoan
Financing Receivable, Modifications [Line Items]
Number | SecurityLoan	4	6	17	12
Pre-Modification Recorded Investment	$ 375	$ 480	$ 1,548	$ 921
Post-Modification Recorded Investment	$ 375	$ 480	$ 1,548	$ 921
Commercial [Member]
Financing Receivable, Modifications [Line Items]
Number | SecurityLoan	2	1	3	1
Pre-Modification Recorded Investment	$ 122	$ 279	$ 279	$ 279
Post-Modification Recorded Investment	$ 122	$ 279	$ 279	$ 279
Agriculture [Member]
Financing Receivable, Modifications [Line Items]
Number | SecurityLoan	2		10	1
Pre-Modification Recorded Investment	$ 253		$ 619	$ 4
Post-Modification Recorded Investment	$ 253		$ 619	$ 4
Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number | SecurityLoan		2	4	4
Pre-Modification Recorded Investment		$ 162	$ 650	$ 525
Post-Modification Recorded Investment		$ 162	$ 650	$ 525
Consumer [Member]
Financing Receivable, Modifications [Line Items]
Number | SecurityLoan		3		6
Pre-Modification Recorded Investment		$ 39		$ 113
Post-Modification Recorded Investment		$ 39		$ 113

XML

Loans Held for Investment and Allowance for Loan Losses - Schedule of How Loans Were Modified as Troubled Debt Restructured Loans (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructured Loans	$ 375	$ 480	$ 1,548	$ 921
Commercial [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructured Loans	122	279	279	279
Agriculture [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructured Loans	253		619	4
Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructured Loans		162	650	525
Consumer [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructured Loans		39		113
Extended Maturity [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructured Loans	375	162	835	162
Extended Maturity [Member] | Commercial [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructured Loans	122		279
Extended Maturity [Member] | Agriculture [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructured Loans	$ 253		354
Extended Maturity [Member] | Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructured Loans		162	202	162
Combined Rate and Maturity [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructured Loans		318	713	759
Combined Rate and Maturity [Member] | Commercial [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructured Loans		279		279
Combined Rate and Maturity [Member] | Agriculture [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructured Loans			265	4
Combined Rate and Maturity [Member] | Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructured Loans			$ 448	363
Combined Rate and Maturity [Member] | Consumer [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructured Loans		$ 39		$ 113

XML

Loans Held for Sale - Additional Information (Detail) - USD ($)	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group [Abstract]
Loans held for sale	$ 22,305,000	$ 21,672,000	$ 24,289,000
Loans held-for-sale at the lower of cost or fair value	$ 3,324,000	$ 2,487,000	$ 19,228,000

XML

Derivative Financial Instruments - Summary of Outstanding Notional Balances and Fair Values of Outstanding Derivative Positions (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
IRLCs [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Outstanding Notional Balance	$ 89,655	$ 37,088	$ 61,520
Asset Derivative Fair Value	1,525	765	501
Forward Mortgage-Backed Securities Trades [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Outstanding Notional Balance	72,500	45,500	17,500
Liability Derivative Fair Value	$ 254	$ 403	$ 47

XML

Borrowings - Schedule of Borrowings (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Debt Disclosure [Abstract]
Securities sold under agreements with customers to repurchase	$ 356,555	$ 409,631	$ 389,010
Federal funds purchased	5,450	4,075	7,925
Advances from Federal Home Loan Bank of Dallas		55,000	60,000
Total	$ 362,005	$ 468,706	$ 456,935

XML

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2017
Income Taxes [Line Items]
Federal statutory tax rate			21.00%		35.00%
Income tax expense	$ 8,594	$ 7,217	$ 15,959	$ 13,462
Effective tax rates on pre-tax income	16.96%	16.09%	16.57%	15.72%

XML

Stock Option Plan and Restricted Stock Plan - Additional Information (Detail) - USD ($)									1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 26, 2019	Apr. 23, 2019	Oct. 23, 2018	Apr. 24, 2018	Oct. 24, 2017	Apr. 25, 2017	Oct. 25, 2016	Oct. 27, 2015	Jun. 26, 2019	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares vesting period			3 years
Risk-free interest rate									1.83%
Expected dividend yield									1.62%
Expected life									6 years 7 months 20 days
Expected volatility									26.69%
Weighted-average grant-date fair value of options granted									$ 7.31
Stock compensation expense										$ 313,000	$ 377,000	$ 625,000	$ 754,000
Granted, Shares									398,850					0
Granted the period exercise price									$ 29.70
Restricted Stock [Member] | Non-Employee Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted		660,000		21,420		29,300
Restricted shares value		$ 21,714		$ 540,000		$ 600,000
Restricted Stock [Member] | Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense										135,000	140,000	270,000	290,000
Restricted Stock [Member] | Officers [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares vesting period	3 years						3 years	3 years
Restricted shares granted	25,818		52,042		28,382		30,810	62,546
Restricted shares value	$ 766,000		$ 1,440,000		$ 655,000		$ 560,000	$ 1,060,000
Stock compensation expense										$ 210,000	$ 158,000	$ 415,000	$ 326,000

XML

Pension Plan - Additional Information (Detail) - USD ($)		3 Months Ended			6 Months Ended		12 Months Ended
	May 31, 2019	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Contributions to the plan					$ 0		$ 0
Defined benefit plan pension obligation retirement benefit percentage							53.00%
Defined benefit plan pension obligation, loss on settlement							$ 1,546,000
Net periodic benefit costs, total		$ 19,000		$ 56,000	$ 942,000	$ 111,000
Orange pension plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension merger expense			$ 900,000
Defined Benefit Plan, Benefit Obligation, Business Combination	$ 2,740,000
Defined Benefit Plan, Plan Assets, Business Combination	$ 1,829,000

XML

Fair Value Disclosures - Additional Information (Detail)	Jun. 30, 2019 USD ($)		Dec. 31, 2018 USD ($)		Jun. 30, 2018 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans carrying value, recorded investment with allowance	$ 14,701,000		$ 13,793,000		$ 19,633,000
Impaired loans valuation reserves	3,866,000		4,069,000		4,823,000
Impaired loans net fair value	10,835,000
Recorded Investment With No Allowance	11,707,000	[1]	13,741,000	[2]	7,052,000	[3]
Other real estate owned, total	635,000		$ 448,000		$ 642,000
Level 2 Inputs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans carrying value, recorded investment with allowance	14,701,000
Impaired loans valuation reserves	$ 3,866,000
Minimum [Member] | Measurement Input, Discount Rate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt discounts, percentage	5
Maximum [Member] | Measurement Input, Discount Rate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt discounts, percentage	25

[1] Includes $464,000 of purchased credit impaired loans.

[2] Includes $827,000 of purchased credit impaired loans.

[3] Includes $2,813,000 of purchased credit impaired loans.

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Fair Value Disclosures - Financial Assets and Financial Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value	$ 3,259,492	$ 3,158,777	$ 3,197,567
Loans held-for-sale	22,305	21,672	24,289
U.S. Treasury Securities [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value	10,020	9,962	9,965
Obligations of U.S. Government Sponsored Enterprises and Agencies [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value		301	303
Obligations of State and Political Subdivisions [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value	1,157,214	1,257,871	1,284,775
Residential Mortgage-Backed Securities [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value	1,596,175	1,454,545	1,435,257
Commercial Mortgage-Backed Securities [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value	491,389	431,300	462,485
IRLCs [Member]
Available-for-sale investment securities:
Asset Derivative Fair Value	1,525	765	501
Forward Mortgage-Backed Securities Trades [Member]
Available-for-sale investment securities:
Forward mortgage-backed securities trades	254	403	47
Fair Value, Measurements, Recurring [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value	3,259,492	3,158,777	3,197,567
Loans held-for-sale	18,981	19,185	5,061
Fair Value, Measurements, Recurring [Member] | U.S. Treasury Securities [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value	10,020	9,962	9,965
Fair Value, Measurements, Recurring [Member] | Obligations of U.S. Government Sponsored Enterprises and Agencies [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value		301	303
Fair Value, Measurements, Recurring [Member] | Obligations of State and Political Subdivisions [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value	1,157,214	1,257,871	1,284,775
Fair Value, Measurements, Recurring [Member] | Residential Mortgage-Backed Securities [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value	1,596,175	1,454,545	1,435,257
Fair Value, Measurements, Recurring [Member] | Commercial Mortgage-Backed Securities [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value	491,389	431,300	462,485
Fair Value, Measurements, Recurring [Member] | IRLCs [Member]
Available-for-sale investment securities:
Asset Derivative Fair Value	1,525	765	501
Fair Value, Measurements, Recurring [Member] | Forward Mortgage-Backed Securities Trades [Member]
Available-for-sale investment securities:
Forward mortgage-backed securities trades	254	403	47
Fair Value, Measurements, Recurring [Member] | Corporate Bonds [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value	228	450	451
Fair Value, Measurements, Recurring [Member] | Other Securities [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value	4,466	4,348	4,331
Fair Value, Measurements, Recurring [Member] | Level 1 Inputs [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value	14,486	14,310	14,296
Fair Value, Measurements, Recurring [Member] | Level 1 Inputs [Member] | U.S. Treasury Securities [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value	10,020	9,962	9,965
Fair Value, Measurements, Recurring [Member] | Level 1 Inputs [Member] | Other Securities [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value	4,466	4,348	4,331
Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value	3,245,006	3,144,467	3,183,271
Loans held-for-sale	18,981	19,185	5,061
Fair Value, Measurements, Recurring [Member] | 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		301	303
Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member] | Obligations of State and Political Subdivisions [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value	1,157,214	1,257,871	1,284,775
Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member] | Residential Mortgage-Backed Securities [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value	1,596,175	1,454,545	1,435,257
Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member] | Commercial Mortgage-Backed Securities [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value	491,389	431,300	462,485
Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member] | IRLCs [Member]
Available-for-sale investment securities:
Asset Derivative Fair Value	1,525	765	501
Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member] | Forward Mortgage-Backed Securities Trades [Member]
Available-for-sale investment securities:
Forward mortgage-backed securities trades	254	403	47
Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member] | Corporate Bonds [Member]
Available-for-sale investment securities:
Available-for-sale investment securities, Total Fair Value	$ 228	$ 450	$ 451

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Fair Value Disclosures - Other Real Estate Owned (Detail) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)
Fair Value Disclosures [Abstract]
Carrying value of other real estate owned prior to re-measurement	$ 526	$ 526
Write-downs included in gain (loss) on sale of other real estate owned	(126)	(126)
Other real estate owned, fair value	$ 400	$ 400

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Fair Value Disclosures - Schedule of Estimated Fair Values and Carrying Values of All Financial Instruments (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	$ 178,345	$ 207,835	$ 178,217
Federal funds sold	700		8,450
Interest-bearing deposits in banks	128,652	40,812	99,499
Interest-bearing time deposits in banks	960	1,458	1,458
Available-for-sale securities	3,259,492	3,158,777	3,197,567
Loans held for investment	3,989,132	3,902,434	3,781,529
Loans held for sale	22,305	21,672	24,289
Borrowings	362,005	468,706	456,935
IRLCs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Asset Derivative Fair Value	1,525	765	501
Forward Mortgage-Backed Securities Trades [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Forward mortgage-backed securities trades	254	403	47
Carrying Value [Member] | Level 1 Inputs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	178,345	207,835	178,217
Federal funds sold	700		8,450
Interest-bearing deposits in banks	128,652	40,812	99,499
Deposits with no stated maturities	5,936,255	5,738,228	5,727,377
Carrying Value [Member] | Level 2 Inputs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest-bearing time deposits in banks	960	1,458	1,458
Accrued interest receivable	36,954	36,765	36,513
Deposits with stated maturities	433,511	442,161	483,230
Borrowings	362,005	468,706	456,935
Accrued interest payable	694	408	223
Carrying Value [Member] | Level 2 Inputs [Member] | IRLCs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Asset Derivative Fair Value	1,525	765	501
Carrying Value [Member] | Level 2 Inputs [Member] | Forward Mortgage-Backed Securities Trades [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Forward mortgage-backed securities trades	254	403	47
Carrying Value [Member] | Levels 1 and 2 Inputs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities	3,259,492	3,158,777	3,197,567
Carrying Value [Member] | Level 3 Inputs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held for investment	3,989,132	3,902,434	3,781,529
Loans held for sale	22,305	21,672	24,289
Estimated Fair Value [Member] | Level 1 Inputs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	178,345	207,835	178,217
Federal funds sold	700		8,450
Interest-bearing deposits in banks	128,652	40,812	99,499
Deposits with no stated maturities	5,936,255	5,738,228	5,727,377
Estimated Fair Value [Member] | Level 2 Inputs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest-bearing time deposits in banks	960	1,458	1,458
Accrued interest receivable	36,954	36,765	36,513
Deposits with stated maturities	433,811	441,727	484,230
Borrowings	362,005	468,706	456,935
Accrued interest payable	694	408	223
Estimated Fair Value [Member] | Level 2 Inputs [Member] | IRLCs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Asset Derivative Fair Value	1,525	765	501
Estimated Fair Value [Member] | Level 2 Inputs [Member] | Forward Mortgage-Backed Securities Trades [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Forward mortgage-backed securities trades	254	403	47
Estimated Fair Value [Member] | Levels 1 and 2 Inputs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities	3,259,492	3,158,777	3,197,567
Estimated Fair Value [Member] | Level 3 Inputs [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held for investment	4,026,543	3,947,391	3,807,267
Loans held for sale	$ 22,347	$ 21,779	$ 24,550

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Recently Issued Authoritative Accounting Guidance - Additional Information (Detail) - USD ($)	3 Months Ended	6 Months Ended	12 Months Ended
	Mar. 31, 2018	Jun. 30, 2019	Dec. 31, 2017
Summary Of Significant Accounting Policies [Line Items]
Federal statutory tax rate		21.00%	35.00%
Accounting Standards Update 2018-02 [Member]
Summary Of Significant Accounting Policies [Line Items]
Reclassification of standard tax debit within accumulated other comprehensive income to retained earnings	$ 5,759,000

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Acquisition - Additional Information (Detail) - USD ($)			6 Months Ended
	Jan. 02, 2018	Oct. 12, 2017	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Business Acquisition [Line Items]
Fair value of total loans			$ 266,327,000
Fair value of purchased credit impaired loans			26,408,000	$ 27,534,000	$ 26,685,000
Contractual amounts			35,235,000	36,614,000	34,412,000
Purchased Credit Impaired Loans [Member]
Business Acquisition [Line Items]
Contractual amounts			750,000	$ 1,157,000	$ 3,918,000
FBC Bancshares, Inc. and First Bank, N.A. [Member]
Business Acquisition [Line Items]
Payment for all outstanding shares of acquired entity by shares		1,289,371
Fair value of total loans			266,327,000
Total loans of contractual amounts			271,714,000
FBC Bancshares, Inc. and First Bank, N.A. [Member] | Purchased Credit Impaired Loans [Member]
Business Acquisition [Line Items]
Fair value of purchased credit impaired loans			3,013,000
Contractual amounts			$ 3,806,000
Commercial Bancshares, Inc [Member]
Business Acquisition [Line Items]
Business acquisition, agreement date			Oct. 12, 2017
Payment for all outstanding shares of acquired entity by shares	1,289,371
Business acquisition, special dividend	$ 22,075,000
Increase decrease in business acquisition, special dividend	$ 42,402,000

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Acquisition - Schedule of Amounts Recorded on Consolidated Balance Sheet on Acquisition Date (Detail) $ in Thousands	Oct. 12, 2017 USD ($)
FBC Bancshares, Inc. and First Bank, N.A. [Member]
Business Acquisition [Line Items]
Common stock issued (1,289,371 shares)	$ 58,087

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Acquisition - Schedule of Amounts Recorded on Consolidated Balance Sheet on Acquisition Date (Parenthetical) (Detail)	Oct. 12, 2017 shares
FBC Bancshares, Inc. and First Bank, N.A. [Member]
Business Acquisition [Line Items]
Common stock issued shares	1,289,371

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Acquisition - Schedule of Preliminary Estimated Fair Value Amounts Assigned to Major Asset and Liability Categories at Acquisition Date (Detail) $ in Thousands	Jun. 30, 2019 USD ($)
Business Acquisition [Line Items]
Loans	$ 266,327
FBC Bancshares, Inc. and First Bank, N.A. [Member]
Business Acquisition [Line Items]
Cash and cash equivalents	18,653
Securities available-for-sale	64,501
Loans	266,327
Identifiable intangible assets	3,167
Other assets	15,375
Total identifiable assets acquired	368,023
Deposits	341,902
Other liabilities	(373)
Total liabilities assumed	341,529
Fair value of net identifiable assets acquired	26,494
Goodwill resulting from acquisition	$ 31,593