Independent Bank (IBTX) 10-K 21 Feb 23 2022 FY Annual report Financial data

Cover

Cover - USD ($)	12 Months Ended
	Dec. 31, 2022	Feb. 17, 2023	Jun. 30, 2022
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Current Fiscal Year End Date	--12-31
Document Period End Date	Dec. 31, 2022
Document Transition Report	false
Entity File Number	001-35854
Entity Registrant Name	Independent Bank Group, Inc.
Entity Incorporation, State or Country Code	TX
Entity Tax Identification Number	13-4219346
Entity Address, Address Line One	7777 Henneman Way
Entity Address, City or Town	McKinney,
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	75070-1711
City Area Code	972
Local Phone Number	562-9004
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	IBTX
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 2,421,350,000
Entity Common Stock, Shares Outstanding		41,169,461
Documents Incorporated by Reference	Portions of the Company’s Proxy Statement relating to the 2023 Annual Meeting of Shareholders, which will be filed within 120 days after December 31, 2022, are incorporated by reference into Part III, Items 10 - 14 of this Annual Report on Form 10-K.
Amendment Flag	false
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY
Entity Central Index Key	0001564618

Audit Information

Audit Information	12 Months Ended
	Dec. 31, 2022
Audit Information [Abstract]
Auditor Name	RSM US LLP
Auditor Location	Dallas, Texas
Auditor Firm ID	49

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Assets
Cash and due from banks	$ 134,183	$ 243,926
Interest-bearing deposits in other banks	520,139	2,364,518
Cash and cash equivalents	654,322	2,608,444
Certificates of deposit held in other banks	496	3,245
Securities available for sale, at fair value	1,691,784	2,006,727
Securities held to maturity, net of allowance for credit losses of $0 and $0, respectively	207,059	0
Loans held for sale (includes $10,612 and $28,249 carried at fair value, respectively)	11,310	32,124
Loans, net of allowance for credit losses of $148,787 and $148,706, respectively	13,760,576	12,290,740
Premises and equipment, net	355,368	308,023
Other real estate owned	23,900	0
Federal Home Loan Bank (FHLB) of Dallas stock and other restricted stock	23,436	21,573
Bank-owned life insurance (BOLI)	240,448	235,637
Deferred tax asset	78,669	26,178
Goodwill	994,021	994,021
Other intangible assets, net	62,999	75,490
Other assets	154,026	130,446
Total assets	18,258,414	18,732,648
Deposits:
Noninterest-bearing	4,736,830	5,066,588
Interest-bearing	10,384,587	10,487,320
Total deposits	15,121,417	15,553,908
FHLB advances	300,000	150,000
Other borrowings	267,066	283,371
Junior subordinated debentures	54,419	54,221
Other liabilities	130,129	114,498
Total liabilities	15,873,031	16,155,998
Commitments and contingencies
Stockholders’ equity:
Preferred stock (0 and 0 shares outstanding, respectively)	0	0
Common stock (41,190,677 and 42,756,234 shares outstanding, respectively)	412	428
Additional paid-in capital	1,959,193	1,945,497
Retained earnings	638,354	625,484
Accumulated other comprehensive (loss) income	(212,576)	5,241
Total stockholders’ equity	2,385,383	2,576,650
Total liabilities and stockholders’ equity	$ 18,258,414	$ 18,732,648
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position	Other assets	Other assets
Debt Securities, Held-to-Maturity, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position	Other assets	Other assets
Financing Receivable, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position	Other assets	Other assets
Operating Lease, Right-of-Use Asset, Statement of Financial Position	Other assets	Other assets
Operating lease, liability, statement of financial position	Other liabilities	Other liabilities

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Securities held to maturity, net of allowance for credit losses of $0 and $0, respectively	$ 0	$ 0
Loans held for sale (includes $10,612 and $28,249 carried at fair value, respectively)	10,612	28,249
Loans, net of allowance for credit losses of $148,787 and $148,706, respectively	$ 148,787	$ 148,706
Preferred stock (0 and 0 shares outstanding, respectively)	0	0
Common stock (41,190,677 and 42,756,234 shares outstanding, respectively)	41,190,677	42,756,234

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Interest income:
Interest and fees on loans	$ 602,210	$ 547,931	$ 579,085
Interest on taxable securities	32,944	22,754	19,150
Interest on nontaxable securities	10,360	8,344	8,472
Interest on interest-bearing deposits and other	9,503	4,533	4,799
Total interest income	655,017	583,562	611,506
Interest expense:
Interest on deposits	77,628	44,199	76,266
Interest on FHLB advances	2,017	2,038	4,170
Interest on other borrowings	14,451	15,247	12,462
Interest on junior subordinated debentures	2,713	1,756	2,162
Total interest expense	96,809	63,240	95,060
Net interest income	558,208	520,322	516,446
Provision for credit losses	4,490	(9,000)	42,993
Net interest income after provision for credit losses	553,718	529,322	473,453
Noninterest income:
Service charges on deposit accounts	12,204	9,842	9,303
Investment management fees	9,146	8,586	7,546
Mortgage banking revenue	8,938	23,157	36,491
Mortgage warehouse purchase program fees	2,676	6,908	6,088
(Loss) gain on sale of loans	(1,844)	56	356
Gain (loss) on sale of other real estate	0	63	(36)
Gain on sale of securities available for sale	0	13	382
(Loss) gain on sale and disposal of premises and equipment	(494)	(304)	370
Increase in cash surrender value of BOLI	5,371	5,209	5,347
Other	15,469	12,987	19,216
Total noninterest income	51,466	66,517	85,063
Noninterest expense:
Salaries and employee benefits	212,087	180,336	157,540
Occupancy	42,938	40,688	39,210
Communications and technology	24,937	22,355	23,113
FDIC assessment	6,883	5,865	6,912
Advertising and public relations	2,106	1,097	2,416
Other real estate owned expenses, net	31	4	487
Impairment of other real estate	0	0	784
Amortization of other intangible assets	12,491	12,580	12,671
Professional fees	15,571	15,530	12,630
Acquisition expense, including legal	0	0	16,225
Other	41,845	35,151	34,146
Total noninterest expense	358,889	313,606	306,134
Income before taxes	246,295	282,233	252,382
Income tax expense	50,004	57,483	51,173
Net income	$ 196,291	$ 224,750	$ 201,209
Basic earnings per share (usd per share)	$ 4.71	$ 5.22	$ 4.67
Diluted earnings per share (usd per share)	$ 4.70	$ 5.21	$ 4.67

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 196,291	$ 224,750	$ 201,209
Other comprehensive (loss) income:
Unrealized (losses) gains arising during the period, excluding the change attributable to available for sale securities reclassified to held to maturity	(265,551)	(38,292)	21,540
Tax effect	(55,766)	(8,041)	4,210
Unrealized (losses) gains arising during the period, net of tax, excluding the change attributable to available for sale securities reclassified to held to maturity	(209,785)	(30,251)	17,330
Change in net unamortized gains on available for sale securities reclassified into held to maturity securities	(21)	0	0
Tax effect	(4)	0	0
Change in net unamortized gains on available for sale securities reclassified into held to maturity securities, net of tax	(17)	0	0
Reclassification of amount of gains realized through sale of securities	0	(13)	(382)
Tax effect	0	(3)	(75)
Reclassification of amount of gains realized through sale of securities, net of tax	0	(10)	(307)
Change in unrealized (losses) gains on securities, net of tax	(209,802)	(30,261)	17,023
Unrealized holding losses arising during the period	(10,916)	(455)	0
Tax effect	(2,292)	(96)	0
Unrealized losses arising during the period, net of tax	(8,624)	(359)	0
Reclassification of amount of losses (gains) recognized into income	771	(597)	0
Tax effect	162	(125)	0
Reclassification of amount of losses (gains) recognized into income, net of tax	609	(472)	0
Change in unrealized losses on derivative financial instruments	(8,015)	(831)	0
Other comprehensive (loss) income, net of tax	(217,817)	(31,092)	17,023
Comprehensive (loss) income	$ (21,526)	$ 193,658	$ 218,232

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Preferred Stock $0.01 Par Value 10 million shares authorized	Common Stock $0.01 Par Value 100 million shares authorized	Additional Paid in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Impact of ASC 326 adoption	Impact of ASC 326 adoption Retained Earnings	Cumulative effect, period of adoption, adjusted balance	Cumulative effect, period of adoption, adjusted balance Preferred Stock $0.01 Par Value 10 million shares authorized	Cumulative effect, period of adoption, adjusted balance Common Stock $0.01 Par Value 100 million shares authorized	Cumulative effect, period of adoption, adjusted balance Additional Paid in Capital	Cumulative effect, period of adoption, adjusted balance Retained Earnings	Cumulative effect, period of adoption, adjusted balance Accumulated Other Comprehensive Income (Loss)
Beginning balance (in shares) at Dec. 31, 2019			42,950,228
Beginning balance at Dec. 31, 2019	$ 2,339,773	$ 0	$ 430	$ 1,926,359	$ 393,674	$ 19,310
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	201,209				201,209
Other comprehensive income (loss), net of tax	17,023					17,023
Common stock repurchased (shares)			(112,499)
Common stock repurchased	(5,819)		$ (1)		(5,818)
Restricted stock forfeited (in shares)			(10,915)
Restricted stock forfeited	0
Restricted stock granted (in shares)			310,290
Restricted stock granted	0		$ 2	(2)
Stock based compensation expense	8,450			8,450
Cash dividends ($1.05, $1.32 and $1.52 per share as of December 31, 2020, 2021 and 2022, respectively)	(45,265)				(45,265)
Ending balance (in shares) at Dec. 31, 2020			43,137,104								43,137,104
Ending balance at Dec. 31, 2020	2,515,371	0	$ 431	1,934,807	543,800	36,333	$ (53,880)	$ (53,880)	$ 2,461,491	$ 0	$ 431	$ 1,934,807	$ 489,920	$ 36,333
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	224,750				224,750
Other comprehensive income (loss), net of tax	(31,092)					(31,092)
Common stock repurchased (shares)			(461,068)
Common stock repurchased	(32,132)		$ (4)		(32,128)
Restricted stock forfeited (in shares)			(35,265)
Restricted stock forfeited	0		$ 0
Restricted stock granted (in shares)			115,463
Restricted stock granted	0		$ 1	(1)
Stock based compensation expense	10,691			10,691
Cash dividends ($1.05, $1.32 and $1.52 per share as of December 31, 2020, 2021 and 2022, respectively)	(57,058)				(57,058)
Ending balance (in shares) at Dec. 31, 2021			42,756,234
Ending balance at Dec. 31, 2021	2,576,650	0	$ 428	1,945,497	625,484	5,241
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	196,291				196,291
Other comprehensive income (loss), net of tax	(217,817)					(217,817)
Common stock repurchased (shares)			(1,704,324)
Common stock repurchased	(119,746)		$ (17)		(119,729)
Restricted stock forfeited (in shares)			(10,393)
Restricted stock forfeited	0
Restricted stock granted (in shares)			149,160
Restricted stock granted	0		$ 1	(1)
Stock based compensation expense	13,697			13,697
Cash dividends ($1.05, $1.32 and $1.52 per share as of December 31, 2020, 2021 and 2022, respectively)	(63,692)				(63,692)
Ending balance (in shares) at Dec. 31, 2022			41,190,677
Ending balance at Dec. 31, 2022	$ 2,385,383	$ 0	$ 412	$ 1,959,193	$ 638,354	$ (212,576)

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Stockholders' Equity [Abstract]
Cash dividends paid (usd per share)	$ 1.52	$ 1.32	$ 1.05
Preferred stock par value (in usd per share)	$ 0.01	$ 0.01	$ 0.01	$ 0.01
Preferred stock shares authorized (shares)	10,000,000	10,000,000	10,000,000	10,000,000
Common stock, par value (usd per share)	$ 0.01	$ 0.01	$ 0.01	$ 0.01
Common stock shares authorized (shares)	100,000,000	100,000,000	100,000,000	100,000,000

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Net income	$ 196,291	$ 224,750	$ 201,209
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation expense	14,934	12,385	12,728
Accretion income recognized on loans	(10,022)	(21,174)	(30,378)
Amortization of other intangibles assets	12,491	12,580	12,671
Amortization of premium on securities, net	7,377	5,226	2,892
Amortization of discount and origination costs on borrowings	893	894	720
Stock based compensation expense	13,697	10,691	8,450
Excess tax (benefit) expense on restricted stock vested	(703)	(691)	243
FHLB stock dividends	(328)	(128)	(567)
Loss (gain) on sale and disposal of premises and equipment	494	304	(370)
Loss (gain) on sale of loans	1,844	(56)	(356)
Gain on sale of securities available for sale	0	(13)	(382)
(Gain) loss on sale of other real estate owned	0	(63)	36
Impairment of other real estate	0	0	784
Impairment of other assets	4,442	124	462
Deferred tax expense (benefit)	5,168	5,353	(1,633)
Provision for credit losses	4,490	(9,000)	42,993
Increase in cash surrender value of BOLI	(5,371)	(5,209)	(5,347)
Excess benefit claim on BOLI	(784)	0	0
Net gain on mortgage loans held for sale	(4,469)	(21,799)	(38,175)
Originations of loans held for sale	(287,960)	(659,536)	(901,163)
Proceeds from sale of loans held for sale	313,243	731,858	892,336
Net change in other assets	(24,059)	14,293	(35,025)
Net change in other liabilities	(24,434)	(23,356)	(7,833)
Net cash provided by operating activities	217,234	277,433	154,295
Cash flows from investing activities:
Proceeds from maturities, calls and paydowns, AFS	7,203,267	7,403,109	5,507,844
Proceeds from sales, AFS	0	9,294	13,862
Purchases, AFS	(7,277,267)	(8,308,955)	(5,570,815)
Purchases, HTM	(91,065)	0	0
Proceeds from maturities of certificates of deposit held in other banks	2,749	1,237	1,237
Proceeds from benefit claim of BOLI	1,344	0	0
Purchase of bank owned life insurance contracts	0	(10,000)	0
Purchases of FHLB stock and other restricted stock	(4,702)	(1,190)	(27,037)
Proceeds from redemptions of FHLB stock and other restricted stock	3,167	50	37,351
Proceeds from sale of loans	25,649	3,034	19,181
Net loans originated held for investment	(1,965,745)	14,805	(674,142)
Originations of mortgage warehouse purchase loans	(13,260,099)	(30,418,842)	(25,833,339)
Proceeds from pay-offs of mortgage warehouse purchase loans	13,736,848	31,083,791	25,066,859
Additions to premises and equipment	(62,961)	(71,356)	(21,135)
Proceeds from sale of premises and equipment	188	21	2,022
Proceeds from sale of other real estate owned	0	538	6,724
Net cash used in investing activities	(1,688,627)	(294,464)	(1,471,388)
Cash flows from financing activities:
Net (decrease) increase in demand deposits, money market and savings accounts	(792,316)	1,508,335	2,871,869
Net increase (decrease) in time deposits	359,825	(353,354)	(414,278)
Proceeds from FHLB advances	375,000	0	1,600,000
Repayments of FHLB advances	(225,000)	(225,000)	(1,550,000)
Proceeds from other borrowings	111,000	75,000	156,489
Repayments of other borrowings	(128,000)	(104,500)	(47,086)
Repurchase of common stock	(119,746)	(32,132)	(5,819)
Dividends paid	(63,492)	(56,861)	(45,265)
Net cash (used in) provided by financing activities	(482,729)	811,488	2,565,910
Net change in cash and cash equivalents	(1,954,122)	794,457	1,248,817
Cash and cash equivalents at beginning of period	2,608,444	1,813,987	565,170
Cash and cash equivalents at end of period	$ 654,322	$ 2,608,444	$ 1,813,987

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2022
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Note 1. Summary of Significant Accounting Policies Nature of operations: Independent Bank Group, Inc. (IBG) through its subsidiary, Independent Bank, a Texas state banking corporation, doing business as Independent Financial (Bank) (collectively known as the Company), provides a full range of banking services to individual and corporate customers in the North, Central and Southeast, Texas areas and along the Colorado Front Range, through its various branch locations in those areas. The Company is engaged in traditional community banking activities, which include commercial and retail lending, deposit gathering, and investment and liquidity management activities. The Company’s primary deposit products are demand deposits, money market accounts and certificates of deposit, and its primary lending products are commercial business and real estate, real estate mortgage and consumer loans. Basis of presentation: The accompanying consolidated financial statements include the accounts of IBG and all other entities in which IBG has controlling financial interest. All material intercompany transactions and balances have been eliminated in consolidation. In addition, the Company wholly-owns nine statutory business trusts that were formed for the purpose of issuing trust preferred securities and do not meet the criteria for consolidation (See Note 11. Junior Subordinated Debentures ). Accounting standards codification: The Financial Accounting Standards Board's (FASB) Accounting Standards Codification (ASC) is the officially recognized source of authoritative U.S. generally accepted accounting principles (GAAP) applicable to all public and non-public non-governmental entities. Rules and interpretive releases of the SEC under the authority of federal securities laws are also sources of authoritative GAAP for SEC registrants. All other accounting literature is considered non-authoritative. Segment reporting: The Company has one reportable segment. The Company’s chief operating decision-maker uses consolidated results to make operating and strategic decisions. Reclassifications: Certain prior period financial statement and disclosure amounts have been reclassified to conform to current period presentation. The reclassifications have no effect on net income or stockholders' equity as previously reported. Use of estimates: The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect certain reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Accordingly, actual results could differ from those estimates. The material estimates included in the financial statements relate to the allowance for credit losses, the valuation of goodwill and valuation of assets and liabilities acquired in business combinations. Cash and cash equivalents: For the purposes of reporting cash flows, cash and cash equivalents include cash on hand, amounts due from banks and federal funds sold. All highly liquid investments with an initial maturity of less than ninety days are considered to be cash equivalents. The Company maintains deposits with other financial institutions in amounts that exceed FDIC insurance coverage. The Company's management monitors the balance in these accounts and periodically assesses the financial condition of the other financial institutions. The Company has not experienced any losses in such accounts and believes it is not exposed to any significant credit risks on cash or cash equivalents. Restricted cash: The Company maintains cash collateral balances which have been pledged to derivative counterparties and are legally restricted as to use. Certificates of deposit: Certificates of deposit are FDIC insured deposits in other financial institutions with original maturities of five years or less and are carried at cost. Securities: Debt securities that management has the positive intent and ability to hold to maturity are classified as held to maturity and recorded at amortized cost. Debt securities that the Company intends to hold for an indefinite period of time, but not necessarily to maturity are classified as available for sale. Securities available for sale are reported at fair value with unrealized gains or losses reported as a separate component of other comprehensive income, net of tax. Any decision to sell a security classified as available for sale would be based on various factors, including significant movements in interest rates, changes in the maturity mix of the Company's assets and liabilities, liquidity needs, regulatory capital considerations and other similar factors. The amortization of premiums and accretion of discounts, computed by the interest method generally over their contractual lives, are recognized in interest income. Premiums on callable securities are amortized to their earliest call date. Realized gains or losses, determined on the basis of the cost of specific securities sold, are included in earnings on the trade date. Loans held for sale: The Company originates residential mortgage loans that may subsequently be sold to unaffiliated third parties. The Company elected the fair value option for certain residential mortgage loans held for sale in accordance with ASC 825, Financial Instruments. This election allows for a more effective offset of the changes in fair values of the loans and the derivative instruments used to economically hedge them without the burden of complying with the requirements for hedge accounting under ASC 815, Derivatives and Hedging . The Company has not elected the fair value option for other residential mortgage loans held for sale primarily because they are not economically hedged using derivative instruments. Mortgage loans originated and intended for sale not recorded under the fair value option are carried at the lower of aggregate cost or fair value, as determined by aggregate outstanding commitments from investors. Net unrealized losses, if any, are recognized through a valuation allowance by charges to income. All mortgage loans held for sale are sold without servicing rights retained. Gains and losses on sales of loans are recognized in noninterest income at settlement dates and are determined by the difference between the sales proceeds and the carrying value of the loans. Loans held for investment: Loans that management has the intent and ability to hold for the foreseeable future or until maturity or pay-off are reported at their outstanding principal balance, net of unearned interest, purchase premiums and discounts, deferred loan fees or costs and an allowance for credit losses. Loan origination fees, net of direct origination costs, are deferred and recognized as an adjustment to the related loan yield using the effective interest method without anticipating prepayments. Further information regarding the Company's accounting policies related to past due loans, non-accrual loans, collateral dependent loans and troubled-debt restructurings is presented in Note 5. Loans, Net and Allowance for Credit Losses on Loans . Acquired loans: In accordance with ASC 326, Measurement of Credit Losses on Financial Instruments , loans acquired in connection with a business combination are recorded at their acquisition-date fair value. The allowance for credit losses related to the acquired loan portfolio is not carried over. Acquired loans are classified into two categories based on the credit risk characteristics of the underlying borrowers as either purchased credit deteriorated (PCD) loans, or loans with no evidence of credit deterioration (non-PCD). PCD loans are defined as a loan or pool of loans that have experienced more-than-insignificant credit deterioration since the origination date. For PCD loans, an initial allowance is established on the acquisition date using the same methodology as other loans held for investment and combined with the fair value of the loan to arrive at acquisition date amortized cost. Accordingly, no provision for credit losses is recognized on PCD loans at the acquisition date. Subsequent to the acquisition date, changes to the allowance are recognized in the provision for credit losses. Non-PCD loans are pooled into segments together with originated held for investment loans that share similar risk characteristics and have an allowance established on the acquisition date, which is recognized in the current period provision for credit losses. Determining the fair value of the acquired loans involves estimating the principal and interest payment cash flows expected to be collected on the loans and discounting those cash flows at a market rate of interest. For PCD loans, the non-credit discount or premium is allocated to individual loans as determined by the difference between the loan’s unpaid principal balance and amortized cost basis. The non-credit premium or discount is recognized into interest income on a level yield basis over the remaining expected life of the loan. For non-PCD loans, the fair value discount or premium is allocated to individual loans and recognized into interest income on a level yield basis over the remaining expected life of the loan. Allowance for credit losses: Refer to Note 2. Recent Accounting Standards for discussion of the adoption of ASU 2016-13, Financial Instruments - Credit Losses (Topic 326), effective January 1, 2021. Allowance for credit losses - loans : The allowance for credit losses on loans is a valuation account that is deducted from the amortized cost basis of loans to present management's best estimate of the net amount expected to be collected. Loans, or portions thereof, are charged-off against the allowance for credit losses when management believes that collectability of the principal is unlikely. Subsequent recoveries, if any, are credited to the allowance. The allowance is increased (decreased) by provisions (or reversals of) reported in the income statement as a component of provision for credit losses. Management has made the accounting policy election to exclude accrued interest receivable on loans from the estimate of credit losses and reports accrued interest separately in other assets in the consolidated balance sheets. Further information regarding Company policies and methodology used to estimate the allowance for credit losses on loans is presented in Note 5. Loans, Net and Allowance for Credit Losses on Loans . Allowance for credit losses - available for sale securities: For available for sale securities in an unrealized loss position, the Company first assesses whether it intends to sell or it is more-likely-than-not that it will be required to sell the securities before recovery of the amortized cost basis. If either of these criteria is met, the securities amortized cost basis is written down to fair value as a current period expense. If either of the above criteria is not met, the Company evaluates whether the decline in fair value is the result of credit losses or other factors. In making this assessment, management may consider various factors including the extent to which fair value is less than amortized cost, performance of any underlying collateral and adverse conditions specifically related to the security, among other factors. If this assessment indicates that a credit loss exists, the present value of cash flows expected to be collected are compared to the amortized cost basis of the security and any excess of the amortized cost basis over the present value of expected cash flows is recorded as an allowance for credit loss, limited to the amount by which the fair value is less than the amortized cost basis. Any impairment not recorded through an allowance for credit loss is recognized in other comprehensive income as a non credit-related impairment. Changes in the allowance for credit losses are recorded as provision for (or reversal of) credit losses. Available for sale securities are charged-off against the allowance or, in the absence of any allowance, written down through income when deemed uncollectible by management or when either of the aforementioned criteria regarding intent or requirement to sell is met. Allowance for credit losses - held to maturity securities : The allowance for credit losses on held to maturity securities is a valuation account that is deducted from the amortized cost basis of held to maturity securities to present management's best estimate of the net amount expected to be collected. Held to maturity securities are charged-off against the allowance when deemed uncollectible by management. Adjustments to the allowance are reported in the income statement as a component of provision for credit losses. Management measures expected credit losses on held to maturity securities on a collective basis by major security type with each type sharing similar risk characteristics and considers historical credit loss information that is adjusted for current conditions and reasonable and supportable forecasts. Management has made the accounting policy election to exclude accrued interest receivable on available for sale and held to maturity securities from the estimate of credit losses and report accrued interest separately in other assets in the consolidated balance sheet. Allowance for credit losses on off-balance sheet credit exposures: The allowance for credit losses on off-balance sheet credit exposures is a liability account, calculated in accordance with ASC 326, representing expected credit losses over the contractual period for which the Company is exposed to credit risk resulting from a contractual obligation to extend credit. No allowance is recognized if we have the unconditional right to cancel the obligation. The allowance is reported as a component of other liabilities in the consolidated balance sheets. Adjustments to the allowance are reported in the income statement as a component of provision for credit losses. Further information regarding Company policies and methodology used to estimate the allowance for credit losses on off-balance sheet credit exposures is presented in Note 13. Off-Balance Sheet Arrangements, Commitments and Contingencies . Premises and equipment, net: Land is carried at cost. Bank premises, furniture and equipment and aircraft are carried at cost, less accumulated depreciation computed principally by the straight-line method over the estimated useful lives of the assets, which range from three Leasehold improvements are carried at cost and are depreciated over the shorter of the estimated useful life or the lease period. Software: Costs incurred in connection with development or purchase of internal use software and cloud computing arrangements, including in-substance software licenses, are capitalized. Amortization is computed on a straight-line basis over the estimated useful life of the asset, which generally ranges from one Leases: The Company's leases are accounted for under ASC Topic 842, Leases . For operating leases with a term greater than one year, the Company recognizes operating right-of-use (ROU) lease assets and operating lease liabilities, which are recorded in other assets and other liabilities, respectively, in the consolidated balance sheets. The Company determines if an arrangement is a lease at inception. Operating ROU lease assets and related liabilities are recognized at commencement date based on the present value of lease payments over the lease term. As the Company's leases do not provide an implicit rate, the Company uses its incremental borrowing rate referenced to the Federal Home Loan Bank Secure Connect advance rates for borrowings of similar terms in determining the present value of lease payments. The operating ROU lease asset also includes any lease pre-payments made and excludes lease incentives. The Company's lease terms may include options to extend or terminate the lease when it is reasonably certain that the Company will exercise that option. Lease expense for lease payments is recognized on a straight-line basis over the lease term. The Company has lease agreements with lease and non-lease components, which the Company has elected to account for separately as the non-lease component amounts are readily determinable under most leases. Long-term assets: Premises and equipment and other long-term assets are reviewed for impairment when events indicate that their carrying amount may not be recoverable from future undiscounted cash flows. If impaired, the assets are recorded at fair value. Other real estate owned: Real estate properties acquired through, or in lieu of, loan foreclosure are initially recorded at fair value less estimated selling costs at the date of foreclosure, establishing a new cost basis. After foreclosure, valuations are periodically performed by management and the real estate is carried at the lower of carrying amount or fair value less cost to sell. Revenue and expenses from operations of other real estate owned and impairment charges on other real estate are included in noninterest expense. Gains and losses on sale of other real estate are included in noninterest income. Goodwill and other intangible assets, net: Goodwill represents the excess of costs over fair value of net assets of businesses acquired. Goodwill is tested for impairment annually on December 31 or on an interim basis if an event triggering impairment may have occurred. If a reporting unit’s carrying amount exceeds its fair value, an entity will record an impairment charge based on that difference. As of December 31, 2022, the fair value of the Company’s stock price and calculated market capitalization exceeded its carrying value. Core deposit intangibles and other acquired customer relationship intangibles arising from bank acquisitions are amortized on a straight-line basis over their estimated useful lives of ten years and thirteen years, respectively. Other intangible assets are tested for impairment whenever events or changes in circumstances indicate the carrying amount of the assets may not be recoverable from future undiscounted cash flows. Restricted stock : The Bank is a member of the FHLB system. Members are required to own a certain amount of stock based on the level of borrowings and other factors, and may invest in additional amounts. FHLB of Dallas and other restricted stock do not have readily determinable fair values as ownership is restricted and they lack a ready market. As a result, these stocks are carried at cost and evaluated periodically by management for impairment. Both cash and stock dividends are reported as income. Bank-owned life insurance: Bank-owned life insurance is recorded at the amount that can be realized under the insurance contracts at the balance sheet date, which is the cash surrender value adjusted for other charges or other amounts due that are probable at settlement. Changes in the net cash surrender value of the policies, as well as insurance proceeds received are reflected in noninterest income. Income taxes: Income tax expense is the total of the current year income tax due or refundable and the change in deferred tax assets and liabilities (excluding deferred tax assets and liabilities related to business combinations or components of other comprehensive income). Deferred tax assets and liabilities are the expected future tax amounts for the temporary differences between carrying amounts and tax bases of assets and liabilities, computed using enacted tax rates. The effect of a change in tax rates on deferred assets and liabilities is recognized in income taxes during the period that includes the enactment date. A valuation allowance, if needed, reduces deferred tax assets to the expected amount more likely than not to be realized. Realization of deferred tax assets is dependent upon the level of historical income, prudent and feasible tax planning strategies, reversals of deferred tax liabilities and estimates of future taxable income. The Company evaluates uncertain tax positions at the end of each reporting period. The Company may recognize the tax benefit from an uncertain tax position only if it is more likely than not that the tax position will be sustained on examination by the taxing authorities, based on the technical merits of the position. The tax benefit recognized in the financial statements from any such position is measured based on the largest benefit that has a greater than fifty percent likelihood of being realized upon ultimate settlement. For tax positions not meeting the "more likely than not" test, no tax benefit is recorded. Any interest and/or penalties related to income taxes are reported as a component of income tax expense. Loan commitments and related financial instruments: In the ordinary course of business, the Company has entered into certain off-balance sheet financial instruments consisting of commitments to extend credit, commercial letters of credit, and standby letters of credit. Such financial instruments are recorded in the financial statements when they are funded or related fees are incurred or received. Stock based compensation: Compensation cost is recognized for restricted stock awards/stock units issued to employees based on the market price of the Company's common stock on the grant date. Stock-based compensation expense is generally recognized using the straight-line method over the requisite service period for time-based awards. Compensation expense for performance stock units is recognized over the service period of the award based upon the probable number of units expected to vest. The impact of forfeitures of stock-based payment awards on compensation expense is recognized as forfeitures occur. Transfers of financial assets: Transfers of financial assets are accounted for as sales, when control over the assets has been relinquished. Control over transferred assets is deemed to be surrendered when the assets have been isolated from the Company, the transferee obtains the right (free of conditions that constrain it from taking advantage of that right) to pledge or exchange the transferred assets, and the Company does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity. Advertising costs: Advertising costs are expensed as incurred. Business combinations: The Company applies the acquisition method of accounting for business combinations. Under the acquisition method, the acquiring entity in a business combination recognizes 100% of the assets acquired and liabilities assumed at their acquisition date fair values. Management utilizes valuation techniques appropriate for the asset or liability being measured in determining these fair values. Any excess of the purchase price over amounts allocated to assets acquired, including identifiable intangible assets, and liabilities assumed is recorded as goodwill. Where amounts allocated to assets acquired and liabilities assumed is greater than the purchase price, a bargain purchase gain is recognized. Adjustments identified during the measurement period are recognized in the reporting period in which the adjustment amounts are determined. Acquisition-related costs are expensed as incurred. Comprehensive income: Accounting principles generally require that recognized revenue, expenses, gains and losses be included in net income. Although certain changes in assets and liabilities, such as unrealized gains and losses on available for sale securities, are reported as a separate component of the equity section of the balance sheet, such items, along with net income, are components of comprehensive income. Gains and losses on available for sale securities are reclassified to net income as the gains or losses are realized upon sale of the securities. For securities transferred from available for sale to the held to maturity classification, the remaining pre-tax gains and losses will be amortized over the remaining life of the securities, as an adjustment of yield on the transferred securities. For cash flow hedges, gains and losses on the derivative(s) are recorded in accumulated other comprehensive income and subsequently reclassified into interest income in the same period that the hedged transaction affects earnings. Fair values of financial instruments: Accounting standards define fair value, establish a framework for measuring fair value in GAAP, and require certain disclosures about fair value measurements (see Note 17. Fair Value Measurements ). In general, fair values of financial instruments are based upon quoted market prices, where available. If such quoted market prices are not available, fair value is based upon 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. These adjustments may include amounts to reflect counterparty credit quality and the Company's creditworthiness, among other things, as well as unobservable parameters. Any such valuation adjustments are applied consistently over time. Derivative financial instruments: The Company enters into certain derivative financial instruments: interest rate lock commitments, forward mortgage-backed securities trades and interest rate swaps. The accounting for changes in fair value depends on the intended use of the derivative. Changes in fair value of derivatives designated in a qualifying hedge relationship are recorded in accumulated other comprehensive income. Changes in fair value of derivatives not designated in a qualifying hedge relationship are recognized directly in earnings. All derivatives are carried at fair value in either other assets or other liabilities. See Note 18. Derivative Financial Instruments for further information regarding Company policy. Mortgage banking: This revenue category reflects the Company's mortgage production revenue, including fees and income derived from mortgages originated with the intent to sell, gains on sales of mortgage loans and the initial and subsequent changes in the fair value of the mortgage derivatives. Interest earned on mortgage loans is recorded in interest income. Revenue recognition: ASC Topic 606, R evenue from Contracts with Customers (ASC 606) , establishes principles for reporting information about the nature, amount, timing and uncertainty of revenue and cash flows arising from the entity's contracts to provide goods or services to customers. The core principle requires an entity to recognize revenue to depict the transfer of goods or services to customers in an amount that reflects the consideration that it expects to be entitled to receive in exchange for those goods or services recognized as performance obligations are satisfied. The majority of the Company's revenue-generating transactions are not subject to ASC 606, including revenue generated from financial instruments, such as loans, letters of credit, and investment securities, as well as revenue related to mortgage banking activities, and BOLI, as these activities are subject to other accounting guidance. Descriptions of revenue-generating activities that are within the scope of ASC 606, and are presented in the accompanying Consolidated Statements of Income as components of noninterest income, are as follows: • Service charges on deposit accounts - these represent general service fees for monthly account maintenance and activity or transaction-based fees and consist of transaction-based revenue, time-based revenue (service period), item-based revenue or some other individual attribute-based revenue. Revenue is recognized when the performance obligation is completed which is generally monthly for account maintenance services or when a transaction has been completed (such as a wire transfer). Payment for such performance obligations are generally received at the time the performance obligations are satisfied. • Investment management - includes income related to providing investment management services to customers under investment management contracts. Also included are fees received from a third party broker-dealer as part of a revenue-sharing agreement for fees earned from customers that are referred to a third party. The investment management fees and referral fees are billed and paid on a quarterly basis and recognized ratably throughout the quarter as performance obligations are satisfied. • Mortgage warehouse purchase program fees - includes fees for the administration and funding of mortgage loans, as well as renewal and application fees received from mortgage originator customers through our mortgage warehouse purchase program. Revenue related to the warehouse program is recognized when the related loan interest is paid off or upon renewal or application. • Gains and losses on the sale of other real estate owned - generally recognized when the performance obligation is complete which is typically at delivery of control over the property to the buyer at time of each real estate closing. • Other noninterest income - includes the Company's correspondent bank earnings credit, acquired loan recoveries, other deposit fees, and merchant interchange income. The majority of these fees in other noninterest income are not subject to the requirements of ASC 606. The other deposit fees and merchant interchange income are in the scope of ASC 606, and payment for such performance obligations are generally received at the time the performance obligations are satisfied. The Company has made no significant judgments in applying the revenue guidance prescribed in ASC 606 that affect the determination of the amount and timing of revenue from the above-described contracts with customers. Subsequent events: Companies are required to evaluate events and transactions that occur after the balance sheet date but before the date the financial statements are issued. They must recognize in the financial statements the effect of all events or transactions that provide additional evidence of conditions that existed at the balance sheet date, including the estimates inherent in the financial statement preparation process. Entities shall not recognize the impact of events or transactions that provide evidence about conditions that did not exist at the balance sheet date but arose after that date. The Company has evaluated subsequent events through the date of filing these financial statements with the Securities and Exchange Commission (SEC) and noted no subsequent events requiring financial statement recognition or disclosure, except as disclosed in Note 22. Subsequent Events . Earnings per share: Basic earnings per common share is calculated as net income available to common shareholders divided by the weighted average number of common shares outstanding during the period. The unvested share-based payment awards that contain rights to non-forfeitable dividends are considered participating securities for this calculation. Diluted earnings per common share includes the dilutive effect of additional potential common shares issuable under participating nonvested restricted stock awards as well as performance stock units (PSUs). The participating nonvested restricted stock awards were not included in dilutive shares as they were anti-dilutive for the years ended December 31, 2022, 2021 and 2020. Proceeds from the assumed exercise of dilutive participating nonvested restricted stock awards and PSUs are assumed to be used to repurchase common stock at the average market price. The following table presents a reconciliation of net income available to common shareholders and the number of shares used in the calculation of basic and diluted earnings per common share. Years Ended December 31, 2022 2021 2020 Basic earnings per share: Net income $ 196,291 $ 224,750 $ 201,209 Less: Undistributed earnings allocated to participating securities 1,037 1,576 1,311 Dividends paid on participating securities 494 534 380 Net income available to common shareholders $ 194,760 $ 222,640 $ 199,518 Weighted average basic shares outstanding 41,385,516 42,666,007 42,754,606 Basic earnings per share $ 4.71 $ 5.22 $ 4.67 Diluted earnings per share: Net income available to common shareholders $ 194,760 $ 222,640 $ 199,518 Total weighted average basic shares outstanding 41,385,516 42,666,007 42,754,606 Add dilutive performance stock units 83,259 58,785 — Total weighted average diluted shares outstanding 41,468,775 42,724,792 42,754,606 Diluted earnings per share $ 4.70 $ 5.21 $ 4.67 Anti-dilutive participating securities 124,503 181,016 58,35

Recent Accounting Pronouncement

Recent Accounting Pronouncements	12 Months Ended
	Dec. 31, 2022
Accounting Policies [Abstract]
Recent Accounting Pronouncements	Note 2. Recent Accounting Pronouncements Adoption of accounting standards ASU 2022-06, Reference Rate Reform (Topic 848): Deferral of the Sunset Date of Topic 848. ASU 2022-06 extends the period of time preparers can utilize the reference rate reform relief guidance provided by ASU 2020-04 and ASU 2021-01, which are discussed below. ASU 2022-06, which was effective upon issuance, defers the sunset date of this prior guidance from December 31, 2022 to December 31, 2024, after which entities will no longer be permitted to apply the relief guidance in Topic 848. The adoption of ASU 2022-06 did not significantly impact the financial statements. ASU 2016-13, Financial Instruments - Credit Losses (Topic 326) (ASC 326): Measurement of Credit Losses on Financial Instruments (ASU 2016-13). On January 1, 2021, the Company adopted ASU 2016-13 and related amendments. The measurement of current expected credit losses (CECL) methodology is applicable to financial assets measured at amortized cost, including loan receivables and held to maturity debt securities. It also applies to off-balance sheet credit exposures not accounted for as insurance (loan commitments, standby letters of credit, financial guarantees, and other similar instruments). The CECL model requires the measurement of all expected credit losses on applicable financial assets based on historical experience, current conditions, and reasonable and supportable forecasts. In addition, ASU 2016-13 includes certain changes to the accounting for available for sale securities such as requiring credit-related impairments to be recognized as an allowance for credit losses rather than as a direct write-down of the securities amortized cost basis when management does not intend to sell or believes that it is more likely than not they will be required to sell securities prior to recovery of the securities amortized cost basis. The Company adopted ASU 2016-13 using the modified retrospective method for all financial assets measured at amortized cost and off-balance sheet credit exposures. As a result of this adoption, the Company recognized a cumulative effect reduction to retained earnings totaling $53,880, net of a recorded deferred tax asset of $15,113, and reclassed $13,035 of allowance for credit loss related to financial assets purchased with credit deterioration (PCD) that were previously classified as purchased credit impaired (PCI) and accounted for under ASC 310-30 as discussed below. Results for periods beginning after January 1, 2021 are presented in accordance with ASU 2016-13 while prior period amounts continue to be reported in accordance with previously applicable GAAP. The Company adopted ASU 2016-13 using the prospective transition approach for PCD assets. In accordance with the standard, management did not reassess whether PCI assets met the criteria of PCD assets as of the date of adoption. On January 1, 2021, the amortized cost basis of the PCD assets were adjusted to reflect the addition of the allowance for credit losses. The remaining noncredit discount (based on the adjusted amortized cost basis) was accreted into interest income at the effective interest rate as of January 1, 2021. The following table illustrates the impact of ASU 2016-13 on the allowances for credit losses as of January 1, 2021, the date of adoption: January 1, 2021 Pre-Adoption Allowance Impact of Adoption Initial allowance on loans purchased with credit deterioration Post-Adoption Allowance Assets: Allowance for credit losses on Loans: Commercial $ 27,311 $ 12,775 $ 4,328 $ 44,414 Commercial real estate 36,698 29,108 7,640 73,446 Commercial construction, land and land development 13,425 22,008 927 36,360 Residential real estate 6,786 (2,255) 140 4,671 Single-family interim construction 2,156 7,179 — 9,335 Agricultural 337 (178) — 159 Consumer 684 (334) — 350 Unallocated 423 (423) — — $ 87,820 $ 67,880 $ 13,035 $ 168,735 Liabilities: Allowance for credit losses on off-balance sheet credit exposures $ — $ 1,113 $ — $ 1,113 ASU 2020-08, Codification Improvements to Subtopic 310-20, Receivables - Nonrefundable Fees and Other Costs . ASU 2020-08 clarifies the accounting for the amortization of purchase premiums for callable debt securities with multiple call dates. ASU 2020-08 was effective for the Company on January 1, 2021 and did not have a significant impact on our financial statements. ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting and subsequent clarifying update ASU 2021-01 Reference Rate Reform (Topic 848); Scope. ASU 2020-04 provides temporary optional guidance to ease the potential burden in accounting for reference rate reform. The new guidance provides optional expedients and exceptions for applying GAAP to contract modifications and hedging relationships, subject to meeting certain criteria, that reference LIBOR or another reference rate expected to be discontinued. The ASU is intended to help stakeholders during the global market-wide reference rate transition period. ASU 2021-01 clarifies that certain optional expedients and exceptions in ASC 848 for contract modifications and hedge accounting apply to derivatives that are affected by the discounting transition. ASU 2021-01 also amends the expedients and exceptions in ASC 848 to capture the incremental consequences of the scope clarification and to tailor the existing guidance to derivative instruments affected by the discounting transition. These ASUs were effective upon issuance and based upon the amendment provided in ASU 2022-06 discussed above, can generally be applied through December 31, 2024. The adoption of these ASUs did not significantly impact our financial statements or disclosures. ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes. The guidance issued in this update simplified the accounting for income taxes by eliminating certain exceptions to the guidance in ASC 740 related to the approach for intraperiod tax allocation, the methodology for calculating income taxes in an interim period and the recognition for deferred tax liabilities for outside basis differences. ASU 2019-12 also simplified aspects of the accounting for franchise taxes and enacted changes in tax laws or rates and clarified the accounting for transactions that result in a step-up in the tax basis of goodwill. ASU 2019-12 was effective for the Company on January 1, 2021 and did not have a significant impact on our financial statements. Newly issued but not yet effective accounting standards ASU 2022-01, Derivatives and Hedging (Topic 815): Fair Value Hedging - Portfolio Layer Method. Under prior guidance, entities can apply the last-of-layer hedging method to hedge the exposure of a closed portfolio of prepayable financial assets to fair value changes due to changes in interest rates for a portion of the portfolio that is not expected to be affected by prepayments, defaults, and other events affecting the timing and amount of cash flows. ASU 2022-01 expands the last-of-layer method, which permits only one hedge layer, to allow multiple hedged layers of a single closed portfolio. To reflect that expansion, the last-of-layer method is renamed the portfolio layer method. ASU 2022-01 also (i) expands the scope of the portfolio layer method to include non-prepayable financial assets, (ii) specifies eligible hedging instruments in a single-layer hedge, (iii) provides additional guidance on the accounting for and disclosure of hedge basis adjustments under the portfolio layer method and (iv) specifies how hedge basis adjustments should be considered when determining credit losses for the assets included in the closed portfolio. ASU 2022-01 will be effective for the Company on January 1, 2023. The adoption of ASU 2022-01 is not expected to have a significant impact on the financial statements. ASU 2022-02, Financial Instruments - Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures. ASU 2022-02 eliminates the accounting guidance for troubled debt restructurings in ASC Subtopic 310-40, Receivables - Troubled Debt Restructurings by Creditors , while enhancing disclosure requirements for certain loan refinancings and restructurings by creditors when a borrower is experiencing financial difficulty. Additionally, ASU 2022-02 requires entities to disclose current-period gross write-offs by year of origination for financing receivables and net investments in leases within the scope of ASC Subtopic 326-20, Financial Instruments - Credit Losses - Measured at Amortized Cost . ASU 2022-02 will be effective for the Company on January 1, 2023. The adoption of ASU 2022-02 is not expected to have a significant impact on the financial statements.

Statement of Cash Flows

Statement of Cash Flows	12 Months Ended
	Dec. 31, 2022
Supplemental Cash Flow Elements [Abstract]
Statement of Cash Flows	Note 3. Statement of Cash Flows As allowed by the accounting standards, the Company has chosen to report, on a net basis, its cash receipts and cash payments for time deposits accepted and repayments of those deposits, and loans made to customers and principal collections on those loans. The Company uses the indirect method to present cash flows from operating activities. Other supplemental cash flow information is presented below: Years Ended December 31, 2022 2021 2020 Cash transactions: Interest expense paid $ 92,506 $ 65,336 $ 97,246 Income taxes paid $ 46,570 $ 58,083 $ 54,842 Noncash transactions: Deferred dividend equivalents $ 200 $ 197 $ — Transfer of loans to other real estate owned $ 23,900 $ — $ 5,239 Loans to facilitate the sale of other real estate owned $ — $ — $ 2,039 Transfer of securities available for sale to held to maturity $ 117,583 $ — $ — Right-of-use assets obtained in exchange for lease liabilities $ 4,011 $ 5,156 $ 105 Loans purchased, not yet settled $ 27,210 $ 29,332 $ 9,442

Securities

Securities	12 Months Ended
	Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract]
Securities	Note 4. Securities Securities have been classified in the consolidated balance sheets according to management’s intent. The amortized cost of securities and their approximate fair values at December 31, 2022 and 2021, are as follows: Amortized Cost (1) Gross Gross Fair Securities Available for Sale December 31, 2022 U.S. treasuries $ 259,675 $ — $ (20,265) $ 239,410 Government agency securities 468,994 — (84,479) 384,515 Obligations of state and municipal subdivisions 264,419 106 (13,294) 251,231 Corporate bonds 43,000 — (5,795) 37,205 Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 913,388 9 (134,924) 778,473 Other securities 950 — — 950 $ 1,950,426 $ 115 $ (258,757) $ 1,691,784 December 31, 2021 U.S. treasuries $ 174,950 $ 724 $ (678) $ 174,996 Government agency securities 453,402 1,221 (9,948) 444,675 Obligations of state and municipal subdivisions 418,554 15,440 (1,234) 432,760 Corporate bonds 33,994 862 (60) 34,796 Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 917,942 10,757 (10,149) 918,550 Other securities 950 — — 950 $ 1,999,792 $ 29,004 $ (22,069) $ 2,006,727 Securities Held to Maturity December 31, 2022 Obligations of state and municipal subdivisions $ 207,059 $ — $ (44,820) $ 162,239 ____________ (1) Excludes accrued interest receivable of $7,702 on available for sale and $2,697 on held to maturity securities at December 31, 2022 and $8,581 on available for sale securities at December 31, 2021 that is recorded in other assets on the accompanying consolidated balance sheets. During 2022, the Company reclassified, at fair value, approximately $117,583 in available for sale obligations of state and municipal subdivisions to the held to maturity category, primarily to limit future volatility in equity due to potential increases in interest rates. The related net unrealized pre-tax gains of approximately $26 remained in accumulated other comprehensive income (loss) and will be amortized over the remaining life of the securities, as an adjustment of the yield on the transferred securities. No transfers of securities occurred in 2021 and as of December 31, 2021, there were no securities held to maturity. The amortized cost and estimated fair value of securities at December 31, 2022, by contractual maturity, are shown below. Maturities of mortgage-backed securities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. December 31, 2022 Available for Sale Held to Maturity Amortized Cost (1) Fair Value Amortized Cost (1) Fair Value Due in one year or less $ 51,502 $ 50,926 $ — $ — Due from one year to five years 317,356 297,914 — — Due from five to ten years 461,073 392,682 — — Thereafter 207,107 171,789 207,059 162,239 1,037,038 913,311 207,059 162,239 Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 913,388 778,473 — — $ 1,950,426 $ 1,691,784 $ 207,059 $ 162,239 ____________ (1) Excludes accrued interest receivable of $7,702 on available for sale and $2,697 on held to maturity securities at December 31, 2022 that is recorded in other assets on the accompanying consolidated balance sheets. Securities with a carrying amount of approximately $1,168,006 and $997,416 at December 31, 2022 and 2021, respectively, were pledged primarily to secure deposits. Proceeds from sale of securities available for sale and gross gains and gross losses for the years ended December 31, 2022, 2021 and 2020 were as follows: Years Ended December 31, 2022 2021 2020 Proceeds from sale $ — $ 9,294 $ 13,862 Gross gains $ — $ 13 $ 385 Gross losses $ — $ — $ 3 The number of securities, unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, as of December 31, 2022 and 2021, are summarized as follows: Less Than 12 Months Greater Than 12 Months Total Description of Securities Number of Securities Estimated Unrealized Number of Securities Estimated Unrealized Estimated Unrealized Securities Available for Sale December 31, 2022 U.S. treasuries 13 $ 106,849 $ (3,923) 23 $ 132,561 $ (16,342) $ 239,410 $ (20,265) Government agency securities 13 63,451 (7,533) 62 321,064 (76,946) 384,515 (84,479) Obligations of state and municipal subdivisions 339 209,395 (9,068) 9 17,034 (4,226) 226,429 (13,294) Corporate bonds 8 23,584 (4,416) 3 10,621 (1,379) 34,205 (5,795) Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 226 266,756 (25,377) 129 511,207 (109,547) 777,963 (134,924) 599 $ 670,035 $ (50,317) 226 $ 992,487 $ (208,440) $ 1,662,522 $ (258,757) December 31, 2021 U.S. treasuries 22 $ 144,172 $ (678) — $ — $ — $ 144,172 $ (678) Government agency securities 38 258,334 (4,622) 22 119,963 (5,326) 378,297 (9,948) Obligations of state and municipal subdivisions 14 47,200 (988) 2 3,555 (246) 50,755 (1,234) Corporate bonds 3 13,440 (60) — — — 13,440 (60) Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 115 621,717 (8,471) 11 44,620 (1,678) 666,337 (10,149) 192 $ 1,084,863 $ (14,819) 35 $ 168,138 $ (7,250) $ 1,253,001 $ (22,069) Securities Held to Maturity December 31, 2022 Obligations of state and municipal subdivisions 22 $ 98,475 $ (21,210) 21 $ 63,764 $ (23,610) $ 162,239 $ (44,820) The Company's securities classified as available for sale and held to maturity are evaluated for expected credit losses by applying the appropriate expected credit losses methodology in accordance with ASC Topic 326, Financial Instruments - Credit Losses. At December 31, 2022 , management's review of all securities at an unrealized loss position determined that the losses resulted from factors not related to credit quality. This conclusion is based on management's analysis of the underlying risk characteristics, including credit ratings, and other qualitative factors for each security type in our portfolio. The unrealized losses on available for sale securities are generally due to increases in market interest rates. Furthermore, the Company has the intent to hold the available for sale securities until maturity or a forecasted recovery, and it is more likely than not that the Company will not have to sell the securities before the recovery of their cost basis. The issuers of these securities continue to make timely principal and interest payments under the contractual terms of the securities. As such, there is no allowance for credit losses on available for sale securities recognized as of December 31, 2022 . The Company's held to maturity securities include taxable and tax-exempt municipal securities issued primarily by school districts, utility districts and municipalities. With regard to securities issued by state and municipal subdivisions, management considers issuer bond ratings, historical loss rates for given bond ratings, whether issuers continue to make timely principal and interest payments under the contractual terms of the securities, internal forecasts and whether or not such securities are guaranteed. A significant portion of the Company's held to maturity securities are guaranteed or insured. Furthermore, as of December 31, 2022 , there were no past due principal or interest payments associated with these securities. As such, no allowance for credit losses has been recorded on held to maturity securities as of December 31, 2022 .

Loans, Net and Allowance for Cr

Loans, Net and Allowance for Credit Losses on Loans	12 Months Ended
	Dec. 31, 2022
Receivables [Abstract]
Loans, Net and Allowance for Loan Losses	Note 5. Loans, Net and Allowance for Credit Losses on Loans Loans, net at December 31, 2022 and 2021, consisted of the following: December 31, 2022 2021 Commercial $ 2,240,959 $ 1,983,886 Mortgage warehouse purchase loans 312,099 788,848 Real estate: Commercial 7,817,447 6,617,455 Commercial construction, land and land development 1,231,071 1,180,181 Residential 1,592,859 1,300,122 Single-family interim construction 508,839 380,627 Agricultural 124,422 106,512 Consumer 81,667 81,815 Total loans (1) 13,909,363 12,439,446 Allowance for credit losses (148,787) (148,706) Total loans, net (1) $ 13,760,576 $ 12,290,740 ____________ (1) Excludes accrued interest receivable of $48,815 and $41,051 at December 31, 2022 and 2021, respectively, that is recorded in other assets on the accompanying consolidated balance sheets. The Company has certain lending policies and procedures in place that are designed to maximize loan income within an acceptable level of risk. Management reviews and approves these policies and procedures on a regular basis. A reporting system supplements the review process by providing management with frequent reports related to loan production, loan quality, concentrations of credit, loan delinquencies and nonperforming and potential problem loans. Commercial loans are underwritten after evaluating and understanding the borrower’s ability to operate profitably and prudently expand its business. The Company’s management examines 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. These cash flows, however, may not be as expected and the value of collateral securing the loans may fluctuate. Most commercial loans are secured by the assets being financed or other business assets such as accounts receivable or inventory and may incorporate a personal guarantee; however, some short-term loans may be made on an unsecured basis. The commercial loan portfolio includes loans made to customers in the energy industry, which is a complex, technical and cyclical industry. Experienced bankers with specialized energy lending experience originate our energy loans. Companies in this industry produce, extract, develop, exploit and explore for oil and natural gas. Loans are primarily collateralized with proven producing oil and gas reserves based on a technical evaluation of these reserves. At December 31, 2022 and 2021, there were approximately $574,698 and $342,776 of energy-related loans outstanding, respectively. Under the CARES Act Paycheck Protection Program (PPP), administered by the Small Business Administration (SBA), the Company originated loans to its customers through the program. PPP loans have terms of two The Company has a mortgage warehouse purchase program providing mortgage inventory financing for residential mortgage loans originated by mortgage banker clients across a broad geographic scale. Proceeds from the sale of mortgages is the primary source of repayment for warehouse inventory financing via approved investor takeout commitments. These loans typically have a very short duration ranging between a few days to 15 days. In some cases, loans to larger mortgage originators may be financed for up to 60 days. Warehouse purchase program loans are collectively evaluated for impairment and are purchased under several contractual requirements, providing safeguards to the Company. To date, the Company has not experienced a loss on these loans and no allowance for credit losses has been allocated to them. Commercial real estate loans are subject to underwriting standards and processes similar to commercial loans. These loans are viewed primarily as cash flow loans and secondarily as loans secured by real estate. Commercial real estate lending typically involves higher loan principal amounts and the repayment of these loans is generally largely dependent on the successful operation of the property or the business conducted on the property securing the loan. Commercial 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 commercial real estate portfolio are diverse in terms of type and geographic location. Management monitors the diversification of the portfolio on a quarterly basis by type and geographic location. Management also tracks the level of owner-occupied property versus non owner-occupied property. At December 31, 2022, the portfolio consisted of approximately 23% of owner-occupied property. Land and commercial land development loans are underwritten using feasibility studies, independent appraisal reviews and financial analysis of the developers or property owners. Generally, borrowers must have a proven track record of success. Commercial construction loans are generally based upon estimates of cost and value of the completed project. These estimates may not be accurate. Commercial construction loans often involve the disbursement of substantial funds with the repayment dependent on the success of the ultimate project. Sources of repayment for these loans may be pre-committed permanent financing or sale of the developed property. The loans in this portfolio are geographically diverse and due to the increased risk are monitored closely by management and the board of directors on a quarterly basis. Residential real estate and single-family interim construction loans are underwritten primarily based on borrowers’ documented income and ability to repay the Bank and other creditors as well as minimum collateral values and credit scores. Relatively small loan amounts are spread across many individual borrowers, which minimizes risk in the residential portfolio. In addition, management evaluates trends in past dues and current economic factors on a regular basis. Agricultural loans are collateralized by real estate and/or agricultural-related assets. Agricultural real estate loans are primarily comprised of loans for the purchase of farmland. Loan-to-value ratios on loans secured by farmland generally do not exceed 80% and have amortization periods limited to twenty years. Agricultural non-real estate loans are generally comprised of term loans to fund the purchase of equipment, livestock and seasonal operating lines to grain farmers to plant and harvest corn and soybeans. Specific underwriting standards have been established for agricultural-related loans including the establishment of projections for each operating year based on industry developed estimates of farm input costs and expected commodity yields and prices. Operating lines are typically written for one year and secured by the crop and other farm assets as considered necessary. Agricultural loans carry credit risks as they involve larger balances concentrated with single borrowers or groups of related borrowers. In addition, repayment of such loans depends on the successful operation or management of the farm property securing the loan or for which an operating loan is utilized. Farming operations may be affected by adverse weather conditions such as drought, hail or floods that can severely limit crop yields. Consumer loans represent less than 1% of the outstanding total loan portfolio. Collateral consists primarily of automobiles and other personal assets. Credit score analysis is used to supplement the underwriting process. Most of the Company’s lending activity occurs within the state of Texas, primarily in the north, central and southeast Texas regions and the state of Colorado, specifically along the Front Range area. As of December 31, 2022, loans in the Colorado region represented about 25% of the total portfolio. A large percentage of the Company’s portfolio consists of commercial and residential real estate loans. As of December 31, 2022 and 2021, there were no concentrations of loans related to a single industry in excess of 10% of total loans. Under ASC 326, the allowance for credit losses is a valuation account that is deducted from the amortized cost basis of loans to present the net amount expected to be collected on the loans. Loans, or portions thereof, are charged-off against the allowance when they are deemed uncollectible. Recoveries do not exceed the aggregate of amounts previously charged-off and expected to be charged-off. The amount of the allowance represents management's best estimate of current expected credit losses on loans considering available information relevant to assessing collectibility over the loans' contractual terms, adjusted for expected prepayments when appropriate. The contractual term excludes expected extensions, renewals and modifications unless either of the following applies: management has a reasonable expectation that a troubled debt restructuring will be executed with an individual borrower, or the extension or renewal options are included in the borrower contract and are not unconditionally cancellable by the Company. The Company's allowance balance is estimated using relevant available information, from internal and external sources, relating to past events, current conditions and reasonable and supportable forecasts. Historical credit loss experience provides the basis for the estimation of expected credit losses. Adjustments to historical loss information are made for differences in current loan-specific risk characteristics such as differences in underwriting standards, portfolio mix, credit quality, or term as well as for changes in environmental conditions, such as changes in unemployment rates, gross domestic product, property values or other relevant factors. The Company utilizes Moody’s Analytics economic forecast scenarios and assigns probability weighting to those scenarios which best reflect management’s views on the economic forecast. The allowance for credit losses is measured on a collective basis for portfolios of loans when similar risk characteristics exist. Loans that do not share risk characteristics are evaluated for expected credit losses on an individual basis and excluded from the collective evaluation. For determining the appropriate allowance for credit losses on a collective basis, the loan portfolio is segmented into pools based upon similar risk characteristics and a lifetime loss-rate model is utilized. For modeling purposes, loan pools include: commercial and industrial, energy, commercial real estate - construction/land development, commercial real estate - owner occupied, commercial real estate - non-owner occupied, agricultural, residential real estate, HELOCs, single-family interim construction, and consumer. Management periodically reassesses each pool to ensure the loans within the pool continue to share similar characteristics and risk profiles and to determine whether further segmentation is necessary. The measurement of expected credit losses is impacted by loan/borrower attributes and certain macroeconomic variables. Management has determined that they are reasonably able to forecast the macroeconomic variables used in the modeling processes with an acceptable degree of confidence for a total of two years then encompassing a reversion process whereby the forecasted macroeconomic variables are reverted to their historical mean utilizing a rational, systematic basis. Management qualitatively adjusts model results for risk factors that are not considered within the modeling processes but are nonetheless relevant in assessing the expected credit losses within the loan pools. These qualitative factor (Q-Factor) adjustments may increase or decrease management's estimate of expected credit losses by a calculated percentage or amount based upon the estimated level of risk. Loans exhibiting unique risk characteristics and requiring an individual evaluation are measured based on 1) the present value of expected future cash flows discounted at the loan's effective interest rate; 2) the loan's observable market price; or 3) the fair value of collateral if the loan is collateral dependent. Substantially all of the Company’s individually evaluated loans are measured at the fair value of the collateral. Management continually evaluates the allowance for credit losses based upon the factors noted above. Should any of the factors considered by management change, the Company’s estimate of credit losses could also change and would affect the level of future provision for credit losses. Portions of the allowance may be allocated for specific credits; however, the entire allowance is available for any credit that, in management’s judgment, should be charged-off. While the calculation of the allowance for credit losses utilizes management’s best judgment and all the information available, the adequacy of the allowance for credit losses is dependent on a variety of factors beyond the Company’s control, including, among other things, the performance of the entire loan portfolio, the economy, changes in interest rates and the view of regulatory authorities towards loan classifications. Loans requiring an individual evaluation are generally identified at the servicing officer level based on review of weekly past due reports and/or the loan officer’s communication with borrowers. In addition, the status of past due loans are routinely discussed within each lending region as well as credit committee meetings to determine if classification is warranted. The Company’s internal loan review department has implemented an internal risk-based loan review process to identify potential internally classified loans that supplements the independent external loan review. External loan reviews cover a wide range of the loan portfolio, including large lending relationships, specifically targeted loan types, and if applicable recently acquired loan portfolios. These reviews include analysis of borrower’s financial condition, payment histories, review of loan documentation and collateral values to determine if a loan should be internally classified. Generally, once classified, an analysis is completed by the credit department to determine the amount of allocated allowance for credit loss required. Expected credit losses for collateral dependent loans, including loans where the borrower is experiencing financial difficulty but foreclosure is not probable, are based on the fair value of the collateral at the reporting date, adjusted for selling costs as appropriate. Following unprecedented declines caused by the pandemic and volatile energy prices, the Texas economy, specifically in the Company’s lending areas of north, central and southeast Texas, continued at a modest pace in the fourth quarter of 2022. The Colorado economy declined slightly. The stronger sectors of the economy of late include the energy and service sectors. Home sales and retail sales fell further with higher interest rates dampening loan demand. Drought conditions improved with widespread rains in the southern U.S. While employment grew modestly and wage growth increased at a moderate pace, there were reports of a slowdown in hiring and an increase in layoffs. Outlooks were mostly pessimistic except for the energy sector, and uncertainty increased, with contacts voicing concern about inflationary pressures, weakening demand and labor challenges. The pandemic continues to impact the economies in the Company's lending areas and the timing and magnitude of recovery cannot be predicted. Additionally, Russia's war against Ukraine is causing tremendous human and economic hardship. The implications for the U.S. economy are highly uncertain, and the war and related events have created additional upward pressure on inflation and are weighing on economic activity. Inflation remains elevated, reflecting supply and demand imbalances related to the pandemic, higher food and energy prices and broader price pressures. The risk of loss associated with all segments of the portfolio could increase due to these factors. The economy and other risk factors are minimized by the Company’s underwriting standards which include the following principles: 1) financial strength of the borrower including strong earnings, high net worth, significant liquidity and acceptable debt to worth ratio, 2) managerial business competence, 3) ability to repay, 4) loan to value, 5) projected cash flow and 6) guarantor financial statements as applicable. The following is a summary of the activity in the allowance for credit losses on loans by class for the years ended December 31, 2022, 2021 and 2020: Commercial Commercial Real Estate Commercial Construction, Residential Single-Family Agricultural Consumer Unallocated Total Year ended December 31, 2022 Balance at beginning of year $ 49,747 $ 65,110 $ 23,861 $ 2,192 $ 7,222 $ 106 $ 468 $ — $ 148,706 Provision for credit losses 5,534 (23) (6,165) 1,183 4,595 101 43 — 5,268 Charge-offs (1,739) (4,159) — (6) — — (10) — (5,914) Recoveries 495 150 — 81 — — 1 — 727 Balance at end of year $ 54,037 $ 61,078 $ 17,696 $ 3,450 $ 11,817 $ 207 $ 502 $ — $ 148,787 Year ended December 31, 2021 Balance at beginning of year $ 27,311 $ 36,698 $ 13,425 $ 6,786 $ 2,156 $ 337 $ 684 $ 423 $ 87,820 Impact of adopting ASC 326 12,775 29,108 22,008 (2,255) 7,179 (178) (334) (423) 67,880 Initial allowance on loans purchased with credit deterioration 4,328 7,640 927 140 — — — — 13,035 Provision for credit losses 12,130 (7,961) (12,373) (2,486) (2,113) (53) 247 — (12,609) Charge-offs (6,856) (375) (126) — — — (174) — (7,531) Recoveries 59 — — 7 — — 45 — 111 Balance at end of year $ 49,747 $ 65,110 $ 23,861 $ 2,192 $ 7,222 $ 106 $ 468 $ — $ 148,706 Year ended December 31, 2020 Balance at beginning of year $ 12,844 $ 24,371 $ 8,714 $ 3,678 $ 1,606 $ 332 $ 231 $ (315) $ 51,461 Provision for credit losses 20,025 13,058 4,711 3,108 632 5 716 738 42,993 Charge-offs (5,670) (735) — — (82) — (386) — (6,873) Recoveries 112 4 — — — — 123 — 239 Balance at end of year $ 27,311 $ 36,698 $ 13,425 $ 6,786 $ 2,156 $ 337 $ 684 $ 423 $ 87,820 The Company will charge-off that portion of any loan which management considers a loss. Commercial and real estate loans are generally considered for charge-off when exposure beyond collateral coverage is apparent and when no further collection of the loss portion is anticipated based on the borrower’s financial condition. The following table presents loans that were evaluated for expected credit losses on an individual basis and the related specific credit loss allocations, by loan class as of December 31, 2022 and 2021: December 31, 2022 December 31, 2021 Loan Balance Specific Allocations Loan Balance Specific Allocations Commercial $ 21,981 $ 8,378 $ 38,911 $ 15,958 Commercial real estate 12,303 1,209 24,683 1,553 Commercial construction, land and land development — — 1,350 562 Residential real estate — — — — Single-family interim construction 189 43 — — Agricultural — — — — Consumer — — — — $ 34,473 $ 9,630 $ 64,944 $ 18,073 Nonperforming loans by loan class at December 31, 2022 and 2021, are summarized as follows: Commercial Commercial Commercial Construction, Residential Real Estate Single-Family Agricultural Consumer Total December 31, 2022 Nonaccrual loans (1) $ 22,565 $ 13,393 $ 15 $ 1,582 $ 189 $ — $ 8 $ 37,752 Loans past due 90 days and still accruing 5 — — 838 — — — 843 Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing) — 1,435 — 59 — — — 1,494 $ 22,570 $ 14,828 $ 15 $ 2,479 $ 189 $ — $ 8 $ 40,089 December 31, 2021 Nonaccrual loans (1) $ 36,802 $ 15,218 $ 23 $ 1,592 $ — $ — $ 38 $ 53,673 Loans past due 90 days and still accruing 187 — — 1,603 — — — 1,790 Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing) — 1,714 — 161 — — — 1,875 $ 36,989 $ 16,932 $ 23 $ 3,356 $ — $ — $ 38 $ 57,338 ____________ (1) There are $125 and $18 in loans on nonaccrual without an allowance for credit loss as of December 31, 2022 and 2021, respectively. Additionally, no interest income was recognized on nonaccrual loans. No significant amounts of accrued interest was reversed during the years ended December 31, 2022 and 2021. The accrual of interest is discontinued on a loan when management believes that, after considering collection efforts and other factors, the borrower's financial condition is such that collection of interest is doubtful, as well as when required by regulatory provisions. Regulatory provisions would typically require the placement of a loan on non-accrual status if 1) principal or interest has been in default for a period of 90 days or more unless the loan is both well secured and in the process of collection or 2) full payment of principal and interest is not expected. All interest accrued but not collected for loans that are placed on nonaccrual status or charged-off is reversed against interest income. Cash collections on nonaccrual loans are generally credited to the loan receivable balance, and no interest income is recognized on those loans until the principal balance has been collected. Loans are generally returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured. The restructuring of a loan is considered a “troubled debt restructuring” (TDR) if both 1) the borrower is experiencing financial difficulties and 2) the creditor has granted a concession. Concessions may include interest rate reductions or below market interest rates, principal forgiveness, extending amortization and other actions intended to minimize potential losses. Modifications primarily relate to extending the amortization periods of the loans and interest rate concessions. The modifications during the reported periods did not materially impact the Company’s determination of the allowance for credit losses. The amortized cost basis and recorded investment in troubled debt restructurings, including those on nonaccrual, was $2,423 and $2,918 as of December 31, 2022 and 2021, respectively. There were no loans modified under troubled debt restructurings during the year ended December 31, 2022. Following is a summary of loans modified under troubled debt restructurings during the year ended December 31, 2021: Commercial Commercial Commercial Construction, Residential Single-Family Agricultural Consumer Total Troubled debt restructurings during the year ended December 31, 2021 Number of contracts 2 — — — — — 1 3 Pre-restructuring outstanding recorded investment $ 1,789 $ — $ — $ — $ — $ — $ 6 $ 1,795 Post-restructuring outstanding recorded investment $ 570 $ — $ — $ — $ — $ — $ 6 $ 576 At December 31, 2022 and 2021, there were no loans modified under troubled debt restructurings during the previous twelve month period that subsequently defaulted during the years ended December 31, 2022 and 2021. At December 31, 2022 and 2021, the Company had no commitments to lend additional funds to any borrowers with loans whose terms have been modified under troubled debt restructurings. Under ASC Subtopic 310-40 and federal banking agencies interagency guidance, certain short-term loan modifications made on a good faith basis in response to COVID-19 (as defined by the guidance) are not considered TDRs. Additionally, under section 4013 of the CARES Act, and as amended, banks may elect to suspend the requirement for certain loan modifications to be categorized as a TDR. In response to the COVID-19 pandemic, the Company has implemented prudent modifications allowing for primarily short-term payment deferrals or other payment relief to borrowers with pandemic-related economic hardships, where appropriate, that complies with the above guidance. As such, the Company's TDR loans noted above do not include loans that are modifications to borrowers impacted by COVID-19. As of December 31, 2022, the amount of loans remaining in COVID-19 related deferment was not significant. Loans are considered past due if the required principal and interest payments have not been received as of the date such payments were due. The following table presents information regarding the aging of past due loans by loan class as of December 31, 2022 and 2021: Loans Loans Total Past Current Total December 31, 2022 Commercial $ 1,005 $ 5,629 $ 6,634 $ 2,234,325 $ 2,240,959 Mortgage warehouse purchase loans — — — 312,099 312,099 Commercial real estate 13,093 449 13,542 7,803,905 7,817,447 Commercial construction, land and land development 2,820 — 2,820 1,228,251 1,231,071 Residential real estate 4,702 1,346 6,048 1,586,811 1,592,859 Single-family interim construction — 189 189 508,650 508,839 Agricultural — — — 124,422 124,422 Consumer 214 8 222 81,445 81,667 $ 21,834 $ 7,621 $ 29,455 $ 13,879,908 $ 13,909,363 December 31, 2021 Commercial $ 1,041 $ 11,056 $ 12,097 $ 1,971,789 $ 1,983,886 Mortgage warehouse purchase loans — — — 788,848 788,848 Commercial real estate 2,861 11,784 14,645 6,602,810 6,617,455 Commercial construction, land and land development — — — 1,180,181 1,180,181 Residential real estate 3,838 1,913 5,751 1,294,371 1,300,122 Single-family interim construction 1,290 — 1,290 379,337 380,627 Agricultural 16 — 16 106,496 106,512 Consumer 216 9 225 81,590 81,815 $ 9,262 $ 24,762 $ 34,024 $ 12,405,422 $ 12,439,446 The Company’s internal classified report is segregated into the following categories: 1) Pass/Watch, 2) Special Mention, 3) Substandard 4) Doubtful and 5) Loss. The loans placed in the Pass/Watch category reflect the Company’s opinion that the loans reflect potential weakness that requires monitoring on a more frequent basis. The loans in the Special Mention category reflect the Company’s opinion that the credit contains weaknesses which represent a greater degree of risk and warrant extra attention. These loans are reviewed monthly by officers and senior management to determine if a change in category is warranted. The loans placed in the Substandard category are considered to be potentially inadequately protected by the current debt service capacity of the borrower and/or the pledged collateral. These credits, even if apparently protected by collateral value, have shown weakness related to adverse financial, managerial, economic, market or political conditions, which may jeopardize repayment of principal and interest and may be considered impaired. There is a possibility that some future loss could be sustained by the Company if such weakness is not corrected. The Doubtful category includes loans that are in default or principal exposure is probable and the possibility of loss is extremely high. The Loss category includes loans that are considered uncollectible, with little chance of turnaround. Management considers the guidance in ASC 310-20 when determining whether a modification, extension or renewal of a loan constitutes a current period origination. Generally, current period renewals of credit are re-underwritten at the point of renewal and considered current period originations for purposes of the table below. The following summarizes the amortized cost basis of loans by year of origination/renewal and credit quality indicator by class of loan as of December 31, 2022 and December 31, 2021: Revolving Loans Converted to Term Loans Term Loans by Year of Origination or Renewal Revolving Loans December 31, 2022 2022 2021 2020 2019 2018 Prior Total Commercial Pass $ 297,800 $ 347,801 $ 126,390 $ 112,887 $ 51,623 $ 153,435 $ 1,031,483 $ 1,173 $ 2,122,592 Pass/Watch 8 14,790 155 188 1,812 7,934 8,216 5,907 39,010 Special Mention 234 4,821 101 1,485 — 144 8,646 20 15,451 Substandard 394 35,950 398 9,191 55 7,037 10,840 41 63,906 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial $ 298,436 $ 403,362 $ 127,044 $ 123,751 $ 53,490 $ 168,550 $ 1,059,185 $ 7,141 $ 2,240,959 Mortgage warehouse purchase loans Pass $ 312,099 $ — $ — $ — $ — $ — $ — $ — $ 312,099 Pass/Watch — — — — — — — — — Special Mention — — — — — — — — — Substandard — — — — — — — — — Doubtful — — — — — — — — — Loss — — — — — — — — — Total mortgage warehouse purchase loans $ 312,099 $ — $ — $ — $ — $ — $ — $ — $ 312,099 Commercial real estate Pass $ 2,652,298 $ 1,980,631 $ 998,910 $ 617,664 $ 448,758 $ 640,275 $ 59,184 $ 9,222 $ 7,406,942 Pass/Watch 90,313 25,954 33,664 18,678 53,469 25,831 — — 247,909 Special Mention 10,180 41,193 — 10,870 8,722 10,735 — 26 81,726 Substandard 3,513 40,001 8,574 3,178 8,268 17,336 — — 80,870 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial real estate $ 2,756,304 $ 2,087,779 $ 1,041,148 $ 650,390 $ 519,217 $ 694,177 $ 59,184 $ 9,248 $ 7,817,447 Commercial construction, land and land development Pass $ 553,376 $ 465,272 $ 126,704 $ 10,477 $ 23,073 $ 12,188 $ 12,705 $ 4,018 $ 1,207,813 Pass/Watch 8,036 43 10,297 — — 72 — — 18,448 Special Mention 1,313 674 — — — — — — 1,987 Substandard 28 2,771 — 10 — 14 — — 2,823 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial construction, land and land development $ 562,753 $ 468,760 $ 137,001 $ 10,487 $ 23,073 $ 12,274 $ 12,705 $ 4,018 $ 1,231,071 Revolving Loans Converted to Term Loans Term Loans by Year of Origination or Renewal Revolving Loans December 31, 2022 2022 2021 2020 2019 2018 Prior Total Residential real estate Pass $ 525,631 $ 379,789 $ 220,077 $ 155,460 $ 79,437 $ 154,875 $ 59,332 $ 1,238 $ 1,575,839 Pass/Watch 373 918 642 1,743 76 3,312 302 — 7,366 Special Mention 2,267 — — 700 227 1,224 126 — 4,544 Substandard 708 455 538 219 — 2,997 193 — 5,110 Doubtful — — — — — — — — — Loss — — — — — — — — — Total residential real estate $ 528,979 $ 381,162 $ 221,257 $ 158,122 $ 79,740 $ 162,408 $ 59,953 $ 1,238 $ 1,592,859 Single-family interim construction Pass $ 351,031 $ 105,573 $ 18,885 $ — $ 241 $ — $ 16,447 $ — $ 492,177 Pass/Watch — — — — — 16,471 2 — 16,473 Special Mention — — — — — — — — — Substandard — — — — — 189 — — 189 Doubtful — — — — — — — — — Loss — — — — — — — — — Total single-family interim construction $ 351,031 $ 105,573 $ 18,885 $ — $ 241 $ 16,660 $ 16,449 $ — $ 508,839 Agricultural Pass $ 52,525 $ 24,743 $ 13,875 $ 3,705 $ 5,847 $ 8,872 $ 10,588 $ — $ 120,155 Pass/Watch 2,700 — — — — — 1,547 — 4,247 Special Mention — — — — — — — — — Substandard — — — — — 20 — — 20 Doubtful — — — — — — — — — Loss — — — — — — — — — Total agricultural $ 55,225 $ 24,743 $ 13,875 $ 3,705 $ 5,847 $ 8,892 $ 12,135 $ — $ 124,422 Consumer Pass $ 7,715 $ 4,909 $ 7,959 $ 1,576 $ 300 $ 81 $ 59,113 $ — $ 81,653 Pass/Watch — — — — — — — — — Special Mention — — — — — — — — — Substandard — 4 — — — 10 — — 14 Doubtful — — — — — — — — — Loss — — — — — — — — — Total consumer $ 7,715 $ 4,913 $ 7,959 $ 1,576 $ 300 $ 91 $ 59,113 $ — $ 81,667 Total loans Pass $ 4,752,475 $ 3,308,718 $ 1,512,800 $ 901,769 $ 609,279 $ 969,726 $ 1,248,852 $ 15,651 $ 13,319,270 Pass/Watch 101,430 41,705 44,758 20,609 55,357 53,620 10,067 5,907 333,453 Special Mention 13,994 46,688 101 13,055 8,949 12,103 8,772 46 103,708 Substandard 4,643 79,181 9,510 12,598 8,323 27,603 11,033 41 152,932 Doubtful — — — — — — — — — Loss — — — — — — — — — Total loans $ 4,872,542 $ 3,476,292 $ 1,567,169 $ 948,031 $ 681,908 $ 1,063,052 $ 1,278,724 $ 21,645 $ 13,909,363 Revolving Loans Converted to Term Loans Term Loans by Year of Origination Revolving Loans December 31, 2021 2021 2020 2019 2018 2017 Prior Total Commercial Pass $ 422,810 $ 183,433 $ 98,059 $ 78,357 $ 81,620 $ 255,213 $ 690,242 $ 5,231 $ 1,814,965 Pass/Watch 260 3,010 1,019 3,135 11,688 65 18,768 3,319 41,264 Special Mention 1,411 117 8,517 7,244 195 4,571 12,885 — 34,940 Substandard 30,277 605 16,041 94 2,478 18,331 13,006 1,988 82,820 Doubtful — — — — — — 9,897 — 9,897 Total commercial $ 454,758 $ 187,165 $ 123,636 $ 88,830 $ 95,981 $ 278,180 $ 744,798 $ 10,538 $ 1,983,886 Mortgage warehouse purchase loans Pass $ 788,848 $ — $ — $ — $ — $ — $ — $ — $ 788,848 Pass/Watch — — — — — — — — — Special Mention — — — — — — — — — Substandard — — — — — — — — — Doubtful — — — — — — — — — Total mortgage warehouse purchase loans $ 788,848 $ — $ — $ — $ — $ — $ — $ — $ 788,848 Commercial real estate Pass $ 2,181,292 $ 1,198,508 $ 830,902 $ 645,470 $ 504,126 $ 626,292 $ 71,850 $ 4,320 $ 6,062,760 Pass/Watch 54,671 18,591 39,045 60,955 30,196 74,762 752 1,319 280,291 Special Mention 56,142 16,770 37,331 29,962 17,649 20,100 — — 177,954 Substandard 36,263 16,118 1,136 11,901 281 29,686 1,065 — 96,450 Doubtful — — — — — — — — — Total commercial real estate $ 2,328,368 $ 1,249,987 $ 908,414 $ 748,288 $ 552,252 $ 750,840 $ 73,667 $ 5,639 $ 6,617,455 Commercial construction, land and land development Pass $ 618,288 $ 262,136 $ 98,007 $ 85,5

Premises and Equipment, Net

Premises and Equipment, Net	12 Months Ended
	Dec. 31, 2022
Property, Plant and Equipment [Abstract]
Premises and Equipment, Net	Note 6. Premises and Equipment, Net Premises and equipment, net at December 31, 2022 and 2021 consisted of the following: December 31, 2022 2021 Land $ 81,570 $ 78,900 Building 274,218 193,475 Furniture, fixtures and equipment 59,979 47,576 Aircraft 8,947 8,947 Leasehold and tenant improvements 6,421 5,834 Construction in progress 3,667 45,263 434,802 379,995 Less accumulated depreciation (79,434) (71,972) $ 355,368 $ 308,023 Depreciation expense amounted to $14,934, $12,385 and $12,728 for the years ended December 31, 2022, 2021 and 2020, respectively.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets, Net	12 Months Ended
	Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets, Net	Note 7. Goodwill and Other Intangible Assets, Net At December 31, 2022 and 2021, goodwill totaled $994,021. The following is a summary of other intangible assets: December 31, 2022 2021 Gross core deposit intangible $ 125,884 $ 125,884 Less accumulated amortization (67,321) (55,323) Total core deposit intangible, net $ 58,563 $ 70,561 Gross customer relationship intangible $ 6,407 $ 6,407 Less accumulated amortization (1,971) (1,478) Total customer relationship intangible, net $ 4,436 $ 4,929 Total other intangible assets, net $ 62,999 $ 75,490 Amortization expense related to intangible assets amounted to $12,491, $12,580 and $12,671 for the years ended December 31, 2022, 2021 and 2020, respectively. The remaining weighted average amortization period for intangible assets is 5.6 years as of December 31, 2022. The future amortization expense related to other intangible assets remaining at December 31, 2022 is as follows: First year $ 12,439 Second year 11,752 Third year 11,238 Fourth year 10,801 Fifth year 8,284 Thereafter 8,485 $ 62,999

Deposits

Deposits	12 Months Ended
	Dec. 31, 2022
Deposits [Abstract]
Deposits	Note 8. Deposits Deposits at December 31, 2022 and 2021 consisted of the following: December 31, 2022 2021 Amount Percent Amount Percent Noninterest-bearing demand accounts $ 4,736,830 31.3 % $ 5,066,588 32.6 % Interest-bearing checking accounts 6,311,868 41.8 6,234,344 40.1 Savings accounts 760,777 5.0 758,727 4.9 Money market accounts 1,889,833 12.5 2,431,965 15.6 Certificates of deposit and individual retirement accounts (IRA), less than $250,000 752,594 5.0 540,011 3.5 Certificates of deposit and individual retirement accounts (IRA), $250,000 and greater 669,515 4.4 522,273 3.3 $ 15,121,417 100.0 % $ 15,553,908 100.0 % At December 31, 2022, the scheduled maturities of certificates of deposit, including IRAs, were as follows: First year $ 951,731 Second year 342,232 Third year 112,691 Fourth year 7,892 Fifth year 7,563 $ 1,422,109

Federal Home Loan Bank Advances

Federal Home Loan Bank Advances	12 Months Ended
	Dec. 31, 2022
Advance from Federal Home Loan Bank [Abstract]
Federal Home Loan Bank Advances	Note 9. Federal Home Loan Bank Advances At December 31, 2022, the Company has advances from the FHLB of Dallas under note payable arrangements with maturities ranging from December 2027 to September 2032. Interest payments on these notes are made monthly. The weighted average interest rate of all notes was 2.42% and 0.48% at December 31, 2022 and 2021, respectively. The balances outstanding on these advances were $300,000 and $150,000 at December 31, 2022 and 2021, respectively. Contractual maturities of FHLB advances at December 31, 2022 were as follows: First year $ — Second year — Third year — Fourth year — Fifth year 100,000 Thereafter 200,000 $ 300,000 The advances are secured by $20,387 of FHLB stock owned by the Company and a blanket lien on certain loans along with specific listed loans for an aggregate available carrying value of $5,926,858 at December 31, 2022. The Company had remaining credit available under the FHLB advance program of $4,640,162 at December 31, 2022. At December 31, 2022, the Company had $976,390 in undisbursed advance commitments (letters of credit) with the FHLB. As of December 31, 2022, these commitments mature on various dates from January 2023 through January 2025. The FHLB letters of credit were obtained in lieu of pledging securities to secure public fund deposits that are over the FDIC insurance limit. At December 31, 2022, there were no disbursements against the advance commitments.

Other Borrowings

Other Borrowings	12 Months Ended
	Dec. 31, 2022
Debt Disclosure [Abstract]
Other Borrowings	Note 10. Other Borrowings Other borrowings at December 31, 2022 and 2021 consisted of the following: December 31, 2022 2021 Unsecured fixed rate subordinated debentures in the amount of $110,000. The balance of borrowings at December 31, 2022 and 2021 is net of discount and origination costs of $555 and $913, respectively. Interest payments of 5.875% are made semiannually on February 1 and August 1. The maturity date is August 1, 2024. The notes may not be redeemed prior to maturity and meet the criteria to be recognized as Tier 2 capital for regulatory purposes. (1)(2) $ 109,445 $ 109,087 Unsecured fixed-to-floating subordinated debentures in the amount of $30,000. The balance of borrowings at December 31, 2022 and 2021 is net of origination costs of $388 and $465, respectively. Interest payments initially of 5.00% fixed rate are made semiannually on June 30 and December 31 through December 31, 2022. Thereafter, floating rate payments of 3 month LIBOR plus 2.83% are made quarterly in arrears beginning on March 31, 2023. The maturity date is December 31, 2027 with next optional redemption on March 31, 2023 and quarterly thereafter. The notes meet the criteria to be recognized as Tier 2 capital for regulatory purposes. (2) 29,612 29,535 Unsecured fixed-to-floating subordinated debentures in the amount of $130,000. The balance of borrowings at December 31, 2022 and 2021 is net of origination costs of $1,991 and $2,251, respectively. Interest payments initially of 4.00% fixed rate are made semiannually on March 15 and September 15 through September 15, 2025. Thereafter, floating rate payments equal to a benchmark rate (which is expected to be 3 month Secured Overnight Financing Rate (SOFR)) plus 3.885% payable quarterly in arrears beginning on December 15, 2025. The maturity date is September 15, 2030 with an optional redemption at September 15, 2025. The notes meet the criteria to be recognized as Tier 2 capital for regulatory purposes. (2) 128,009 127,749 Unsecured revolving line of credit with an unrelated commercial bank in the amount of $100,000. The line bears interest at the monthly Bloomberg Short-Term Bank Yield Index (BSBY) plus 1.75% and matured February 16, 2023. The Company is required to meet certain financial covenants on a quarterly basis, which includes certain restrictions on cash at IBG and meeting minimum capital ratios. (3) — 17,000 $ 267,066 $ 283,371 ____________ (1) At December 31, 2022 and 2021, other borrowings included amounts owed to related parties of $50. (2) The permissible portion of qualified subordinated notes decreases 20% per year during the final five years of the term of the notes. (3) Subsequent to December 31, 2022, the Company renewed the line (see Note 22. Subsequent Events ). The Company has established federal funds lines of credit notes with eleven unaffiliated banks totaling $545,000 and $400,000 of borrowing capacity at December 31, 2022 and 2021, respectively. At December 31, 2022, three of the lines totaling $115,000 have stated maturity dates in May, September and December 2023. The remaining lines have no stated maturity dates and the lenders may terminate the lines at any time without notice. The lines are provided on an unsecured basis and must be repaid the following business day from when the funds are borrowed. There were no borrowings against the lines at December 31, 2022 and 2021. In addition, the Company maintains a secured line of credit with the Federal Reserve Bank with an availability to borrow approximately $1,072,483 and $851,051 at December 31, 2022 and 2021, respectively. Approximately $1,326,376 and $1,195,362 of certain loans and securities were pledged as collateral at December 31, 2022 and 2021, respectively. There were no borrowings against this line as of December 31, 2022 and 2021.

Junior Subordinated Debentures

Junior Subordinated Debentures	12 Months Ended
	Dec. 31, 2022
Debt Disclosure [Abstract]
Junior Subordinated Debentures	Note 11. Junior Subordinated Debentures The Company has formed or acquired nine statutory business trusts (the Trusts) for the purpose of issuing trust preferred securities. Each of the Trusts have issued capital and common securities and invested the proceeds thereof in an equivalent amount of junior subordinated debentures (the Debentures) issued by the Company. The interest rate payable on, and the payment terms of the Debentures are the same as the distribution rate and payment terms of the respective issues of capital and common securities issued by the Trusts. The Debentures are subordinated and junior in right of payment to all present and future senior indebtedness. The Company has fully and unconditionally guaranteed the obligations of each of the Trusts with respect to the capital and common securities. Except under certain circumstances, the common securities issued to the Company by the trusts possess sole voting rights with respect to matters involving those entities. Under certain circumstances, the Company may, from time to time, defer the debentures' interest payments, which would result in a deferral of distribution payments on the related trust preferred securities and, with certain exceptions, prevent the Company from declaring or paying cash distributions on the Company's common stock and any other future debt ranking equally with or junior to the debentures. The Company may redeem the debentures, which are intended to qualify as Tier 1 capital, at the Company’s option, subject to approval of the Federal Reserve. As of December 31, 2022 and 2021, the carrying amount of debentures outstanding totaled $54,419 and $54,221, respectively. Information regarding the Debentures as of December 31, 2022 are summarized in the table below: Trust Preferred Securities Issued Debentures Carrying Value Repricing Frequency Interest Rate Interest Rate Index Maturity Date IB Trust I $ 5,155 $ 5,155 Quarterly 7.69% LIBOR + 3.25% March 2033 Guaranty Trust III 10,310 10,310 Quarterly 7.18 LIBOR + 3.10 July 2033 IB Trust II 3,093 3,093 Quarterly 6.93 LIBOR + 2.85 March 2034 Cenbank Trust III 15,464 15,464 Quarterly 6.73 LIBOR + 2.65 April 2034 IB Trust III 3,712 3,712 Quarterly 7.09 LIBOR +2.40 December 2035 IB Centex Trust I 2,578 2,578 Quarterly 7.94 LIBOR + 3.25 February 2035 Community Group Statutory Trust I 3,609 3,609 Quarterly 6.37 LIBOR + 1.60 June 2037 Northstar Trust II (1) 5,155 4,045 Quarterly 6.44 LIBOR + 1.67 June 2037 Northstar Trust III (1) 8,248 6,453 Quarterly 6.44 LIBOR + 1.67 September 2037 $ 57,324 $ 54,419 ____________

Leases

Leases	12 Months Ended
	Dec. 31, 2022
Leases [Abstract]
Leases	Note 12. Leases The Company’s primary leasing activities relate to certain real estate operating leases entered into in support of the Company’s branch operations and back office operations. The Company leases 21 of its 93 branches. The Company’s branch locations operating under lease agreements have all been designated as operating leases. In addition, the Company leases certain equipment under operating leases. The Company does not have leases designated as finance leases. As of December 31, 2022 and 2021 the Company’s lease ROU assets were $24,830 and $24,126, respectively, and related lease liabilities were $25,913 and $23,573, respectively. Leases have remaining terms ranging from three months to 28.1 years, including extension options that the Company is reasonably certain will be exercised. The table below summarizes net lease cost: Years Ended December 31, 2022 2021 2020 Operating lease cost $ 6,559 $ 6,567 $ 6,937 Short term lease cost 121 64 124 Variable lease cost 1,455 1,645 1,631 Sublease income (268) (282) (221) Net lease cost $ 7,867 $ 7,994 $ 8,471 The table below summarizes other information related to operating leases: Years Ended December 31, 2022 2021 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 5,743 $ 5,740 Weighted average remaining lease term - operating leases, in years 7.19 7.41 Weighted average discount rate - operating leases 2.97 % 3.01 % The following table outlines lease payment obligations as outlined in the Company’s lease agreements for each of the next five years and thereafter in addition to a reconcilement to the Company’s current lease liability as of December 31, 2022. 2023 $ 5,397 2024 5,123 2025 4,329 2026 2,895 2027 2,090 Thereafter 9,000 Total lease payments 28,834 Less imputed interest (2,921) $ 25,913 As of December 31, 2022, the Company had not entered into any material leases that have not yet commenced.

Off-Balance Sheet Arrangements,

Off-Balance Sheet Arrangements, Commitments and Contingencies	12 Months Ended
	Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Off-Balance Sheet Arrangements, Commitments and Contingencies	Note 13. Off-Balance Sheet Arrangements, Commitments and Contingencies Financial Instruments with Off-Balance Sheet Risk The Company is a party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers. The commitments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the balance sheet. The Company’s exposure to credit loss in the event of nonperformance by the other party to the financial instrument for commitments to extend credit is represented by the contractual amount of this instrument. The Company uses the same credit policies in making commitments and conditional obligations as it does for on-balance sheet instruments. At December 31, 2022 and 2021, the approximate amounts of these financial instruments were as follows: December 31, 2022 2021 Commitments to extend credit $ 3,291,409 $ 2,770,036 Standby letters of credit 24,135 30,007 $ 3,315,544 $ 2,800,043 Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates 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. The Company evaluates each customer’s credit worthiness on a case-by-case basis. The amount of collateral obtained if deemed necessary by the Company upon extension of credit is based on management’s credit evaluation of the counterparty. Collateral held varies but may include accounts receivable, inventory, farm crops, property, plant and equipment and income-producing commercial properties. Letters of credit are written conditional commitments used by the Company to guarantee the performance of a customer to a third party. The Company’s policies generally require that letter of credit arrangements contain security and debt covenants similar to those contained in loan arrangements. In the event the customer does not perform in accordance with the terms of the agreement with the third party, the Company would be required to fund the commitment. The maximum potential amount of future payments the Company could be required to make is represented by the contractual amount shown in the table above. If the commitment is funded, the Company would be entitled to seek recovery from the customer. Allowance For Credit Losses on Off-Balance Sheet Credit Exposures The allowance for credit losses on off-balance sheet credit exposures is calculated under ASC 326, representing expected credit losses over the contractual period for which the Company is exposed to credit risk resulting from a contractual obligation to extend credit. Off-balance sheet credit exposures primarily consist of amounts available under outstanding lines of credit and letters of credit detailed in the table above. The allowance for credit losses on off-balance sheet credit exposures is estimated by loan segment at each balance sheet date using the same methodologies as portfolio loans, taking into consideration the likelihood that funding will occur based on historical utilization rates. The allowance is included in other liabilities on the Company’s consolidated balance sheets. The allowance for credit losses on off-balance sheet commitments was as follows: December 31, 2022 2021 2020 Balance at beginning of period $ 4,722 $ — $ — Impact of ASC 326 adoption — 1,113 — Provision for off-balance sheet credit exposure (778) 3,609 — Balance at end of period $ 3,944 $ 4,722 $ — Litigation The Company is involved in certain legal actions arising from normal business activities. Management believes that the outcome of such proceedings will not materially affect the financial position, results of operations or cash flows of the Company. A legal proceeding that the Company believes could become material is described below. The Bank is a party to a legal proceeding inherited in connection with its acquisition of BOH Holdings, Inc. and its subsidiary, Bank of Houston (BOH). The plaintiffs in the case are alleging that the Bank aided and abetted or participated in a fraudulent scheme. The Company believes the claims made in this lawsuit are without merit and is vigorously defending the lawsuit. The Company is unable to predict when the matter will be resolved, the ultimate outcome or potential costs or damages to be incurred.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Income Taxes	Note 14. Income Taxes Income tax expense for the years ended December 31, 2022, 2021 and 2020 was as follows: Years Ended December 31, 2022 2021 2020 Current income tax expense $ 44,836 $ 52,130 $ 52,806 Deferred income tax expense (benefit) 5,168 5,353 (1,633) Income tax expense, as reported $ 50,004 $ 57,483 $ 51,173 A reconciliation between reported income tax expense and the amounts computed by applying the U.S. federal statutory income tax rate of 21% for the years ended December 31, 2022, 2021 and 2020 to income before income taxes is presented below: Years Ended December 31, 2022 2021 2020 Income tax expense computed at the statutory rate $ 51,722 $ 59,269 $ 53,000 Tax-exempt interest income from municipal securities (2,176) (1,752) (1,779) Tax-exempt loan income (1,116) (1,359) (1,245) Bank owned life insurance income (1,296) (1,094) (1,123) State taxes, net of federal benefit 2,045 2,516 2,660 Non-deductible compensation 919 473 — Net tax (benefit) expense from stock based compensation (703) (691) 243 Other 609 121 (583) $ 50,004 $ 57,483 $ 51,173 Components of deferred tax assets and liabilities are presented in the table below. Deferred taxes as of December 31, 2022 and 2021 are based on the U.S. statutory federal income tax rate of 21%. December 31, 2022 2021 Deferred tax assets: Allowance for loan losses $ 33,241 $ 33,463 Net unrealized loss on available for sale securities 54,315 — Lease liabilities under operating leases 5,640 5,141 NOL and tax credit carryforwards from acquisitions 2,986 3,354 Net unrealized loss on cash flow hedge 2,351 221 Acquired loan fair market value adjustments 3,785 5,750 Stock-based compensation 2,496 1,822 Reserve for bonuses and other accrued expenses 4,163 3,775 Deferred loan fees and costs, net 3,738 2,800 Acquired securities 1,107 1,611 Acquired intangibles 1,060 1,213 Unearned income 420 503 Deferred compensation 416 628 Noncompete agreements 484 540 Nonaccrual loans 268 463 Other 868 663 117,338 61,947 Deferred tax liabilities: Premises and equipment (16,920) (10,376) Right-of-use assets under operating leases (5,404) (4,934) Net unrealized gain on available for sale securities — (1,457) Intangible assets (13,711) (16,464) Acquired junior subordinated debentures fair value adjustment (632) (677) FHLB and other restricted stocks (359) (335) Acquired tax goodwill (899) (735) Other (744) (791) (38,669) (35,769) Net deferred tax asset $ 78,669 $ 26,178 At December 31, 2022, the Company had federal net operating loss carryforwards of approximately $12,708 which expire in various years from 2024 to 2032 and state net operating loss carryforwards of approximately $9,141 which expire in various years from 2025 to 2027. Deferred tax assets are recognized for net operating losses because the benefit is more likely than not to be realized. No valuation allowance for deferred tax assets was recorded at December 31, 2022 or 2021 as management believes it is more likely than not that all of the deferred tax assets will be realized. The Company does not have any material uncertain tax positions and does not have any interest and penalties recorded in the income statement for the years ended December 31, 2022, 2021 and 2020. The Company files a consolidated income tax return in the US federal tax jurisdiction. The Company is no longer subject to examination by the US federal tax jurisdiction for years prior to 2019.

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2022
Related Party Transactions [Abstract]
Related Party Transactions	Note 15. Related Party Transactions In the ordinary course of business, the Company has and expects to continue to have transactions, including loans to its officers, directors and their affiliates. In the opinion of management, such transactions are on the same terms as those prevailing at the time for comparable transactions with unaffiliated persons. Loan activity for officers, directors and their affiliates for the year ended December 31, 2022 is as follows: Balance at beginning of year $ 34,627 New loan originations 13,641 Repayments (13,545) Changes in affiliated persons 1,075 Balance at end of year $ 35,798 See Note 10, Other Borrowings , for related party borrowings.

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2022
Retirement Benefits [Abstract]
Employee Benefit Plans	Note 16. Employee Benefit Plans The Company has a 401(k) profit sharing plan (Plan) which covers employees over the age of eighteen

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2022
Fair Value Disclosures [Abstract]
Fair Value Measurements	Note 17. Fair Value Measurements The fair value of an asset or liability is the price that would be received to sell that asset or paid to transfer that liability in an orderly transaction occurring in the principal market (or most advantageous market in the absence of a principal market) for such asset or liability. In estimating fair value, the Company utilizes valuation techniques that are consistent with the market approach, the income approach and/or the cost approach. Such valuation techniques are consistently applied. Inputs to valuation techniques include the assumptions that market participants would use in pricing an asset or liability. ASC Topic 820, Fair Value Measurements and Disclosures , 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 might 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 (such as interest rates, volatilities, prepayment speeds, credit risks, etc.) or inputs that are derived principally from or corroborated by market data by correlation or other means. Level 3 Inputs – Unobservable inputs for determining the fair values of assets or liabilities that reflect an entity’s own assumptions about the assumptions that market participants would use in pricing the assets or liabilities. The Company elected the fair value option for certain residential mortgage loans held for sale in accordance with ASC 825, Financial Instruments. This election allows for a more effective offset of the changes in fair values of the loans and the derivative instruments used to economically hedge them without the burden of complying with the requirements for hedge accounting under ASC 815, Derivatives and Hedging . The Company has not elected the fair value option for other residential mortgage loans held for sale primarily because they are not economically hedged using derivative instruments. See below and Note 18. Derivative Financial Instruments , for additional information. Assets and Liabilities Measured on a Recurring Basis The following table represents assets and liabilities reported on the consolidated balance sheets at their fair value on a recurring basis as of December 31, 2022 and 2021 by level within the ASC Topic 820 fair value measurement hierarchy: Fair Value Measurements at Reporting Date Using Assets/ Quoted Prices Significant Significant December 31, 2022 Assets: Investment securities available for sale: U.S. treasuries $ 239,410 $ — $ 239,410 $ — Government agency securities 384,515 — 384,515 — Obligations of state and municipal subdivisions 251,231 — 251,231 — Corporate bonds 37,205 — 37,205 — Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 778,473 — 778,473 — Other securities 950 — 950 — Loans held for sale, fair value option elected (1) 10,612 — 10,612 — Derivative financial instruments: Interest rate lock commitments 294 — 294 — Forward mortgage-backed securities trades 98 — 98 — Financial institution counterparty 13,968 — 13,968 — Liabilities: Derivative financial instruments: Interest rate swaps - cash flow hedge 11,283 — 11,283 — Interest rate lock commitments 6 — 6 — Forward mortgage-backed securities trades 11 — 11 — Loan customer counterparty 13,788 — 13,788 — December 31, 2021 Assets: Investment securities available for sale: U.S. treasuries $ 174,996 $ — $ 174,996 $ — Government agency securities 444,675 — 444,675 — Obligations of state and municipal subdivisions 432,760 — 432,760 — Corporate bonds 34,796 — 34,796 — Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 918,550 — 918,550 — Other securities 950 — 950 — Loans held for sale, fair value option elected (1) 28,249 — 28,249 — Derivative financial instruments: Interest rate lock commitments 1,029 — 1,029 — Forward mortgage-backed securities trades 27 — 27 — Loan customer counterparty 6,459 — 6,459 — Financial institution counterparty 1,078 — 1,078 — Liabilities: Derivative financial instruments: Interest rate swaps - cash flow hedge 1,158 — 1,158 — Interest rate lock commitments 4 — 4 — Forward mortgage-backed securities trades 21 — 21 — Loan customer counterparty 1,073 — 1,073 — Financial institution counterparty 6,772 — 6,772 — ____________ (1) At December 31, 2022 and 2021, loans held for sale for which the fair value option was elected had an aggregate outstanding principal balance of $10,330 and $27,176, respectively. There were no mortgage loans held for sale under the fair value option that were 90 days or greater past due or on nonaccrual at December 31, 2022. A description of the valuation methodologies used for instruments measured at fair value, as well as the general classification of such instruments pursuant to the valuation hierarchy, is set forth below. Investment securities available for sale Securities classified as available for sale are reported at fair value utilizing Level 1 and Level 2 inputs. Securities are classified within Level 1 when quoted market prices are available in an active market. Inputs include securities that have quoted prices in active markets for identical assets. For securities utilizing Level 2 inputs, the Company obtains fair value measurements from an independent pricing service. The fair value measurements consider observable data that may include dealer quotes, market spreads, cash flows, the U.S. Treasury and other yield curves, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the security’s terms and conditions, among other things. Loans held for sale Certain mortgage loans held for sale are measured at fair value on a recurring basis due to the Company's election to adopt fair value accounting treatment for those loans originated for which the Company has entered into certain derivative financial instruments as part of its mortgage banking and related risk management activities. These instruments include interest rate lock commitments and mandatory forward commitments to sell these loans to investors known as forward mortgage-backed securities trades. This election allows for a more effective offset of the changes in fair values of the assets and the mortgage related derivative instruments used to economically hedge them without the burden of complying with the requirements for hedge accounting under ASC 815, Derivatives and Hedging . Mortgage loans held for sale, for which the fair value option was elected, which are sold on a servicing released basis, are valued using a market approach by utilizing either: (i) the fair value of 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 to 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. For mortgage loans held for sale for which the fair value option was elected, the earned current contractual interest payment is recognized in interest income, loan origination costs and fees on fair value option loans are recognized in earnings as incurred and not deferred. The Company has no continuing involvement in any residential mortgage loans sold. Derivatives The Company utilizes interest rate swaps to hedge exposure to interest rate risk and variability of cash flows associated to changes in the underlying interest rate of the hedged item. These hedging interest rate swaps are classified as a cash flow hedge. The Company utilizes a third-party vendor for derivative valuation purposes. These vendors determine the appropriate fair value based on a net present value calculation of the cash flows related to the interest rate swaps using primarily observable market inputs such as interest rate yield curves (Level 2 inputs). The estimated fair values of interest rate lock commitments utilize 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 interest rate lock commitments 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, as the valuations are based on observable market inputs. Forward mortgage-backed securities trades are exchange-traded or traded within highly active dealer markets. In order to determine the fair value of these instruments, the Company utilized the exchange price or dealer market price for the particular derivative contract; therefore these contracts are classified as Level 2. The estimated fair values are subject to change primarily due to changes in interest rates. The Company also enters into certain interest rate derivative positions. The estimated fair value of these commercial loan interest rate swaps are obtained from a pricing service that provides the swaps' unwind value (Level 2 inputs). See Note 18. Derivative Financial Instruments , for more information. Assets and Liabilities Measured on a Nonrecurring Basis In accordance with ASC Topic 820, certain assets and liabilities are measured at fair value on a nonrecurring basis; that is, the assets and liabilities are not measured at fair value on an ongoing basis but are subject to fair value adjustments in certain circumstances (for example, when there is evidence of impairment). The following table presents the assets carried on the consolidated balance sheet by caption and by level in the fair value hierarchy at December 31, 2022 and 2021, for which a nonrecurring change in fair value has been recorded: Fair Value Measurements at Reporting Date Using Assets Quoted Prices Significant Significant Period Ended December 31, 2022 Assets: Individually evaluated loans $ 8,527 $ — $ — $ 8,527 $ 3,505 Other real estate owned 23,900 — — 23,900 3,548 December 31, 2021 Assets: Individually evaluated loans $ 11,204 $ — $ — $ 11,204 $ 3,526 Individually evaluated loans are measured at an observable market price (if available) or at the fair value of the loan’s underlying collateral (if collateral dependent). Fair value of the loan’s collateral is determined by appraisals or independent valuation, which is then adjusted for the estimated costs related to liquidation of the collateral. Management’s ongoing review of appraisal information may result in additional discounts or adjustments to valuation based upon more recent market sales activity or more current appraisal information derived from properties of similar type and/or locale. In addition, management's discounting criteria may vary for loans secured by non-real estate collateral such as inventory, oil and gas reserves, accounts receivable, equipment or other business assets. Management reviews the appraisals or valuations for appropriateness and adjusts the value downward to consider selling and closing costs, which typically range from 5% to 8% of the appraised value. Therefore, the Company has categorized its individually evaluated loans as Level 3. Other real estate owned is measured at fair value on a nonrecurring basis (upon initial recognition or subsequent impairment). Other real estate owned is classified within Level 3 of the valuation hierarchy. When transferred from the loan portfolio, other real estate owned is adjusted to fair value less estimated selling costs and is subsequently carried at the lower of carrying value or fair value less estimated selling costs. The fair value is determined using an external appraisal process, discounted based on internal criteria. Management reviews the external appraisals for appropriateness and adjusts the value downward to consider selling and closing costs, which typically range from 5% to 8% of the appraised value. Therefore, the Company has categorized its other real estate as Level 3. There was no other real estate owned remeasured during the year ended December 31, 2021. In addition, mortgage loans held for sale not recorded under the fair value option are required to be measured at the lower of cost or fair value. The fair value of these loans is based upon binding quotes or bids from third party investors. As of December 31, 2022 and 2021, all mortgage loans held for sale not recorded under the fair value option were recorded at cost. Fair Value of Financial Instruments not Recorded at Fair Value The carrying amount, estimated fair value and the level of the fair value hierarchy of the Company’s financial instruments that are reported at amortized cost on the Company's consolidated balance sheets were as follows at December 31, 2022 and 2021: Fair Value Measurements at Reporting Date Using Carrying Estimated Quoted Prices Significant Significant December 31, 2022 Financial assets: Cash and cash equivalents $ 654,322 $ 654,322 $ 654,322 $ — $ — Certificates of deposit held in other banks 496 486 — 486 — Investment securities held to maturity 207,059 162,239 — 162,239 — Loans held for sale, at cost 698 710 — 710 — Loans, net 13,760,576 13,450,582 — — 13,450,582 FHLB of Dallas stock and other restricted stock 23,436 23,436 — 23,436 — Accrued interest receivable 59,214 59,214 — 59,214 — Financial liabilities: Deposits 15,121,417 15,063,025 — 15,063,025 — Accrued interest payable 9,604 9,604 — 9,604 — FHLB advances 300,000 246,519 — 246,519 — Other borrowings 267,066 258,800 — 258,800 — Junior subordinated debentures 54,419 53,969 — 53,969 — Off-balance sheet assets (liabilities): Commitments to extend credit — — — — — Standby letters of credit — — — — — December 31, 2021 Financial assets: Cash and cash equivalents $ 2,608,444 $ 2,608,444 $ 2,608,444 $ — $ — Certificates of deposit held in other banks 3,245 3,246 — 3,246 — Loans held for sale, at cost 3,875 3,982 — 3,982 — Loans, net 12,290,740 12,415,366 — — 12,415,366 FHLB of Dallas stock and other restricted stock 21,573 21,573 — 21,573 — Accrued interest receivable 49,636 49,636 — 49,636 — Financial liabilities: Deposits 15,553,908 15,553,645 — 15,553,645 — Accrued interest payable 5,301 5,301 — 5,301 — FHLB advances 150,000 128,555 — 128,555 — Other borrowings 283,371 303,250 — 303,250 — Junior subordinated debentures 54,221 45,501 — 45,501 — Off-balance sheet assets (liabilities): Commitments to extend credit — — — — — Standby letters of credit — — — — — The methods and assumptions used by the Company in estimating fair values of financial instruments as disclosed herein in accordance with ASC Topic 825, Financial Instruments , other than for those measured at fair value on a recurring and nonrecurring basis discussed above, are as follows: Cash and cash equivalents: The carrying amounts of cash and cash equivalents approximate their fair value. Certificates of deposit held in other banks: The fair value of certificates of deposit held in other banks is based upon current market rates. Investment securities held to maturity: For investment securities held to maturity, the Company obtains fair value measurements from an independent pricing service. The fair value measurements consider observable data that may include dealer quotes, market spreads, cash flows, the U.S. Treasury and other yield curves, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the security's terms and conditions, among other things. Loans held for sale, at cost: The fair value of loans held for sale is determined based upon commitments on hand from investors. Loans: A discounted cash flow model is used to estimate the fair value of the loans. The discounted cash flow approach models the credit losses directly in the projected cash flows, applying various assumptions regarding credit, interest and prepayment risks for the loans based on loan types, payment types and fixed or variable classifications. Federal Home Loan Bank of Dallas and other restricted stock: The carrying value of restricted securities such as stock in the Federal Home Loan Bank of Dallas and Independent Bankers Financial Corporation approximates fair value. Deposits: The fair values disclosed for demand deposits are, by definition, equal to the amount payable on demand at the reporting date (that is their carrying amounts). The carrying amounts of variable-rate certificates of deposit (CDs) approximate their fair values at the reporting date. Fair values for fixed-rate CDs are estimated using a discounted cash flow calculation that applies interest rates currently being offered on certificates to a schedule of aggregated expected monthly maturities on time deposits. Federal Home Loan Bank advances, line of credit and federal funds purchased: The fair value of advances maturing within 90 days approximates carrying value. Fair value of other advances is based on the Company’s current borrowing rate for similar arrangements. Other borrowings: The estimated fair value approximates carrying value for short-term borrowings. The fair value of private subordinated debentures is based upon prevailing rates on similar debt in the market place. The subordinated debentures that are publicly traded are valued based on indicative bid prices based upon market pricing observations in the current market. Junior subordinated debentures: The fair value of junior subordinated debentures is estimated using discounted cash flow analyses based on the published Bloomberg US Financials BB rated corporate bond index yield. Accrued interest: The carrying amounts of accrued interest approximate their fair values. Off-balance sheet instruments: Fair values for off-balance sheet, credit-related financial instruments are based on fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements and the counterparties' credit standing. The fair value of commitments is not material.

Derivative Financial Instrument

Derivative Financial Instruments	12 Months Ended
	Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Note 18. Derivative Financial Instruments The Company accounts for its derivative financial instruments in accordance with ASC Topic 815 which requires all derivative instruments to be carried at fair value on the balance sheet. The Company has designated certain derivative instruments used to manage interest rate risk as hedge relationships with certain assets, liabilities or cash flows being hedged. Certain derivatives used for interest rate risk management are not designated in a hedge relationship and are used for asset and liability management related to the Company's mortgage banking activities and commercial customers' financing needs. All derivatives are carried at fair value in either other assets or other liabilities. Derivative instruments designated in a hedge relationship to mitigate exposure to changes in the fair value of an asset, liability, or firm commitment attributable to a particular risk, such as interest rate risk, are considered fair value hedges. Derivative instruments designated in a hedge relationship to mitigate exposure to variability in expected future cash flows, or other types of forecasted transactions, are considered cash flow hedges. The Company formally documents the relationship between derivatives and hedged items, as well as the risk-management objective and the strategy for undertaking hedge transactions at the inception of the hedge relationship. This documentation includes linking the fair value or cash flow hedges to the specific assets and liabilities on the balance sheet or the specific firm commitments or forecasted transaction. The Company assesses, both at the hedge's inception and on an ongoing basis, whether the derivative instruments that are used are highly effective in offsetting changes in fair values or cash flows of the hedged items. The Company discontinues hedge accounting when it determines that the derivative is no longer effective in offsetting changes in the fair value or cash flows of the hedged item, the derivative is settled or terminates, a hedged forecasted transaction is no longer probable, a hedged firm commitment is no longer firm, or treatment of the derivative as a hedge is no longer appropriate or intended. The Company's objectives in using interest rate derivatives are to add stability to interest income and to manage its exposure to interest rate movements. To accomplish this objective, the Company uses interest rate swaps as part of its interest rate risk management strategy. Interest rate swaps designated as cash flow hedges involve the receipt of fixed-rate amounts from a counterparty in exchange for the Company making variable-rate payments over the life of the agreements without exchange of the underlying notional amount. The Company has two interest rate swap derivatives with an aggregated notional amount of $100,000 that were designated as cash flow hedges. The derivatives are intended to hedge the variable cash flows associated with certain existing variable-interest rate loans and were determined to be effective during the year ended December 31, 2022. For derivatives designated and that qualify as cash flow hedges of interest rate risk, the gain or loss on the derivative is recorded in accumulated other comprehensive income (loss) and subsequently reclassified into interest income in the same period that the hedged transaction affects earnings. Amounts of losses recognized in accumulated other comprehensive income (loss) related to derivatives was $8,624, net of tax, and the amounts of losses that were reclassified to interest income as interest payments were made on the Company’s variable-rate loans was $609, net of tax, during and for the year ended December 31, 2022. Amounts of losses recognized in accumulated other comprehensive income related to derivatives was $359, net of tax, and the amounts of gains that were reclassified to interest income as interest payments were received on the Company’s variable-rate loans was $472, net of tax, during and for the year ended December 31, 2021. During the next twelve months, the Company estimates that $3,838 will be reclassified as a decrease to interest income. Through its mortgage banking division, the Company enters into interest rate lock commitments with consumers to originate mortgage loans at a specified interest rate. 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. The Company manages the changes in fair value associated with changes in interest rates related to interest rate lock commitments by using forward sold commitments known as forward mortgage-backed securities trades. These instruments are typically entered into at the time the interest rate lock commitment is made. The Company offers certain derivatives products, primarily interest rate swaps, directly to qualified commercial banking customers to facilitate their risk management strategies. The interest rate swap derivative positions relate to transactions in which the Company enters into an interest rate swap with a customer, while at the same time entering into an offsetting interest rate swap with another financial institution. An interest rate swap transaction allows customers to effectively convert a variable rate loan to a fixed rate. In connection with each swap, the Company agrees to pay interest to the customer on a notional amount at a variable interest rate and receive interest from the customer on a similar notional amount at a fixed interest rate. At the same time, the Company agrees to pay another financial institution the same fixed interest rate on the same notional amount and receive the same variable interest rate on the same notional amount. The following table provides the outstanding notional balances and fair values of outstanding derivative positions at December 31, 2022 and 2021: Outstanding Notional Balance Asset Derivative Liability Derivative December 31, 2022 Derivatives designated as hedging instruments: Interest rate swaps - cash flow hedge $ 100,000 $ — $ 11,283 Derivatives not designated as hedging instruments: Interest rate lock commitments 15,476 294 6 Forward mortgage-backed securities trades 18,500 98 11 Commercial loan interest rate swaps: Loan customer counterparty 183,183 — 13,788 Financial institution counterparty 183,183 13,968 — December 31, 2021 Derivatives designated as hedging instruments: Interest rate swaps - cash flow hedge $ 100,000 $ — $ 1,158 Derivatives not designated as hedging instruments: Interest rate lock commitments 34,064 1,029 4 Forward mortgage-backed securities trades 30,500 27 21 Commercial loan interest rate swaps: Loan customer counterparty 254,935 6,459 1,073 Financial institution counterparty 254,935 1,078 6,772 The commercial loan customer counterparty weighted average received and paid interest rates for interest rate swaps outstanding were as follows: Weighted Average Interest Rate December 31, 2022 December 31, 2021 Received Paid Received Paid Loan customer counterparty 4.12 % 6.72 % 4.12 % 2.40 % The credit exposure related to interest rate swaps is limited to the net favorable value of all swaps by each counterparty, which was approximately $13,968 and $7,537 at December 31, 2022 and 2021, respectively. In some cases collateral may be required from the counterparties involved if the net value of the derivative instruments exceeds a nominal amount. Collateral levels are monitored and adjusted on a regular basis for changes in interest rate swap values. At December 31, 2022 and 2021, cash of $10,394 and $20,491 and securities of $509 and $3,168 were pledged as collateral for these derivatives, respectively, and counterparties had deposited $3,390 of cash with the Company as of December 31, 2022. The Company has entered into credit risk participation agreements with financial institution counterparties for interest rate swaps related to loans in which the Company is either a participant or a lead bank. Risk participation agreements entered into as a participant bank provide credit protection to the financial institution counterparty should the borrower fail to perform on its interest rate derivative contract with that financial institution. The Company is party to no risk participation agreement as a participant bank at December 31, 2022. Risk participation agreements entered into as the lead bank provide credit protection to the Company should the borrower fail to perform on its interest rate derivative contract. The Company is party to one risk participation agreement as the lead bank having a notional amount of $9,082 at December 31, 2022. The changes in the fair value of interest rate lock commitments and the forward sales of mortgage-backed securities are recorded in mortgage banking revenue. These gains and losses were not attributable to instrument-specific credit risk. For commercial interest rate swaps, because the Company acts as an intermediary for our customer, changes in the fair value of the underlying derivative contracts substantially offset each other and do not have a material impact on the results of operations. A summary of derivative activity and the related impact on the consolidated statements of income for the years ended December 31, 2022, 2021 and 2020 is as follows: Income Statement Location Years Ended December 31, 2022 2021 2020 Derivatives designated as hedging instruments Interest rate swaps - cash flow hedges Interest and fees on loans $ (791) $ 584 $ — Derivatives not designated as hedging instruments Interest rate lock commitments Mortgage banking revenue (737) (2,490) 2,668 Forward mortgage-backed securities trades Mortgage banking revenue 81 574 (505)

Stock Awards

Stock Awards	12 Months Ended
	Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]
Stock Awards	Note 19. Stock Awards The Company grants common stock awards to certain employees of the Company. In May 2022, the shareholders of the Company approved a new 2022 Equity Incentive Plan (2022 Plan). Under this plan, the Compensation Committee may grant awards to certain employees of the Company in the form of restricted stock, restricted stock units, stock appreciation rights, qualified and nonqualified stock options, performance share awards and other equity-based awards. Effective with the adoption of the 2022 Plan, no further awards will be granted under the prior 2013 Equity Incentive Plan (2013 Plan). Awards outstanding under the 2013 Plan will remain in effect under the prior plan according to their respective terms and any terminated 2013 Plan awards will be available for awards under the 2022 Plan in accordance with the 2022 Plan's provisions. The 2022 Plan has 1,500,000 reserved shares of common stock to be awarded by the Company’s Compensation Committee. As of December 31, 2022, there were 1,459,078 shares remaining available for grant for future awards. Shares issued under these plans are restricted stock awards and performance stock units at target award level. Restricted stock awarded to employees generally vest evenly over the required employment period, and range from one three Restricted Stock Awards The following table summarizes the activity in nonvested restricted stock awards for the years ended December 31, 2022 and 2021: Restricted Stock Awards Number of Weighted Average Nonvested shares, December 31, 2021 363,551 $ 53.14 Granted during the period 149,160 69.80 Vested during the period (193,303) 54.61 Forfeited during the period (10,393) 57.40 Nonvested shares, December 31, 2022 309,015 $ 60.12 Nonvested shares, December 31, 2020 468,800 $ 49.01 Granted during the period 115,463 66.10 Vested during the period (185,447) 51.18 Forfeited during the period (35,265) 50.23 Nonvested shares, December 31, 2021 363,551 $ 53.14 Compensation expense related to these awards is recorded based on the fair value of the award at the date of grant and totaled $10,856, $8,984 and $8,450 for the years ended December 31, 2022, 2021 and 2020, respectively. Compensation expense is recorded in salaries and employee benefits in the accompanying consolidated statements of income. At December 31, 2022, future compensation expense is estimated to be $11,659 and will be recognized over a remaining weighted average period of 2.28 years. The fair value of common stock awards that vested during the years ended December 31, 2022, 2021 and 2020 was $13,795, $12,651 and $5,602, respectively. The Company has recorded $(703), $(691) and $243 in excess tax (benefit) expense on vested restricted stock to income tax expense for the years ended December 31, 2022, 2021 and 2020, respectively. There were no modifications of stock agreements during 2022, 2021 and 2020 that resulted in significant additional incremental compensation costs. At December 31, 2022, the future vesting schedule of the nonvested restricted stock awards is as follows: Number of Shares First year 156,588 Second year 97,066 Third year 42,154 Fourth year 13,207 Total nonvested shares 309,015 Performance Stock Units Performance stock units represent shares potentially issuable in the future. The number of shares issued is based upon the measure of the Company's achievement of its relative adjusted return on average tangible common equity, as defined by the Company, over the award's performance period as compared to an identified peer group's achievement over the same performance period. The number of shares issuable under each performance award is the product of the award target and the award payout percentage for the given level of achievement which ranges from 0% to 150% of the target. The following table summarizes the activity in nonvested performance stock units at target award level for the years ended December 31, 2022 and 2021: Performance-Based Restricted Stock Units Number of Weighted Average Nonvested shares, December 31, 2021 114,498 $ 43.93 Granted during the period 25,742 72.65 Nonvested shares, December 31, 2022 140,240 $ 49.20 Nonvested shares, December 31, 2020 89,300 $ 38.29 Granted during the period 25,198 63.92 Nonvested shares, December 31, 2021 114,498 $ 43.93 Compensation expense related to performance stock units is estimated each period based on the fair value of the target stock unit at the grant date and the most probable level of achievement of the performance condition, adjusted for the passage of time within the vesting periods of the awards. Compensation expense related to these awards was $2,841, $1,707 and $0 for the years ended December 31, 2022, 2021 and 2020, respectively. As of December 31, 2022, the unrecognized compensation expense assuming the target attainment is estimated to be $2,887, while the estimated maximum payout is $6,605 . The remaining performance period over which the expense will be recognized is 1.99 years.

Regulatory Matters

Regulatory Matters	12 Months Ended
	Dec. 31, 2022
Regulated Operations [Abstract]
Regulatory Matters	Note 20. Regulatory Matters Under banking law, there are legal restrictions limiting the amount of dividends the Bank can declare. Approval of the regulatory authorities is required if the effect of dividends declared would cause the regulatory capital of the Bank to fall below specified minimum levels. For state banks, subject to regulatory capital requirements, payment of dividends is generally allowed to the extent of net profits. The Company (on a consolidated basis) and the Bank are subject to various regulatory capital requirements administered by federal and state banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the Company’s consolidated financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company and the Bank must meet specific capital guidelines that involve quantitative measures of assets, liabilities and certain off-balance sheet items as calculated under regulatory accounting practices. The capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings and other factors. Tier 2 capital for the Company includes permissible portions of the Company's subordinated notes. The permissible portion of qualified subordinated notes decreases 20% per year during the final five years of the term of the notes. The Company is subject to the Basel III regulatory capital framework (the Basel III Capital Rules). The Basel III Capital Rules require that the Company maintain a 2.5% capital conservation buffer above the minimum risk-based capital adequacy requirements. 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 full 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. In February 2019, the federal bank regulatory agencies issued a final rule that revised certain capital regulations under ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, and included a transition option that allows banking organizations to phase in, over a three year period, the day one adverse effects of adoption on their regulatory capital ratios (three year transition option). In connection with the adoption of ASC 326 on January 1, 2021, the Company recognized an after-tax cumulative effect reduction to retained earnings. The Company elected to adopt the three year transition option and the deferral has been applied in capital ratios presented below. Quantitative measures established by regulation to ensure capital adequacy require the Company and the Bank to maintain minimum amounts and ratios (set forth in the table below) of total, Common Equity Tier 1 (CET1) and Tier 1 capital (as defined in the regulations) to risk weighted assets (as defined), and of Tier 1 capital (as defined) to average assets (as defined). Management believes, as of December 31, 2022 and 2021, the Company and the Bank meet all capital adequacy requirements to which they are subject, including the capital buffer requirement. As of December 31, 2022 and 2021, the Bank’s capital ratios exceeded those levels necessary to be categorized as “well capitalized” under the regulatory framework for prompt corrective action. To be categorized as “well capitalized,” the Bank must maintain minimum total risk based, CET1, Tier 1 risk based and Tier 1 leverage ratios as set forth in the table. There are no conditions or events that management believes have changed the Bank’s category. The following table presents actual and required capital ratios under Basel III Capital Rules for the Company and Bank as of December 31, 2022 and 2021. Capital levels required to be considered well capitalized are based upon prompt corrective action regulations, as amended, to reflect the changes under the Basel III Capital Rules. Actual Minimum Capital Required To Be Considered Well Capitalized (1) Amount Ratio Amount Ratio Amount Ratio December 31, 2022 Total capital to risk weighted assets: Consolidated $ 1,936,363 12.35 % $ 1,645,772 10.50 % $ 1,567,402 10.00 % Bank 2,013,874 12.85 1,645,236 10.50 1,566,891 10.00 Tier 1 capital to risk weighted assets: Consolidated 1,637,191 10.45 1,332,291 8.50 940,441 6.00 Bank 1,896,702 12.10 1,331,858 8.50 1,253,513 8.00 Common equity tier 1 to risk weighted assets: Consolidated 1,581,591 10.09 1,097,181 7.00 N/A N/A Bank 1,896,702 12.10 1,096,824 7.00 1,018,479 6.50 Tier 1 capital to average assets: Consolidated 1,637,191 9.49 690,309 4.00 N/A N/A Bank 1,896,702 10.99 690,130 4.00 862,663 5.00 December 31, 2021 Total capital to risk weighted assets: Consolidated $ 1,916,163 13.67 % $ 1,471,510 10.50 % $ 1,401,438 10.00 % Bank 1,983,530 14.16 1,471,036 10.50 1,400,987 10.00 Tier 1 capital to risk weighted assets: Consolidated 1,614,372 11.52 1,191,223 8.50 840,863 6.00 Bank 1,885,739 13.46 1,190,839 8.50 1,120,790 8.00 Common equity tier 1 to risk weighted assets: Consolidated 1,558,772 11.12 981,007 7.00 N/A N/A Bank 1,885,739 13.46 980,691 7.00 910,642 6.50 Tier 1 capital to average assets: Consolidated 1,614,372 8.80 733,954 4.00 N/A N/A Bank 1,885,739 10.28 733,785 4.00 917,231 5.00 _____________ (1) “Well-capitalized” Common Equity Tier 1 to Risk-Weighted Assets and Tier 1 to Average Assets are not formally defined under applicable banking regulations for bank holding companies. However, the Federal Reserve Board and the FDIC may require the Company to maintain a Tier 1 to Average Assets Ratio above the required minimum. Stock repurchase program: From time to time, the Company's Board of Directors has authorized stock repurchase programs which allow the Company to purchase its common stock generally over a one-year period at various prices in the open market or in privately negotiated transactions. In December 2021, the Company's Board established the 2022 Stock Repurchase Plan, which provides for the repurchase of up to $160,000 of common stock through December 31, 2022. Under this program, the Company repurchased 1,651,236 shares at a total cost of $115,966 for the year ended December 31, 2022. There were 419,098 shares repurchased at a total cost of $29,241 by the Company during the year ended December 31, 2021 under a prior plan. Federal bank regulators have adopted final rules that, among other things, eliminated the standalone prior approval requirement for any repurchase of common stock. However, the Company remains subject to a Federal Reserve Board guideline that requires consultation with the Federal Reserve Board regarding plans for share repurchases. The Company’s repurchases of its common stock may be subject to a prior approval or notice requirement under other regulations, policies or supervisory expectations of the Federal Reserve Board. Company stock repurchased to settle employee tax withholding related to vesting of stock awards totaled 53,088 shares at a total cost of $3,780, and 41,970 shares at a total cost of $2,891 for the periods ended December 31, 2022 and 2021, respectively, and were not included under the repurchase program.

Parent Company Only Financial S

Parent Company Only Financial Statements	12 Months Ended
	Dec. 31, 2022
Condensed Financial Information Disclosure [Abstract]
Parent Company Only Financial Statements	Note 21. Parent Company Only Financial Statements The following balance sheets, statements of income and statements of cash flows for Independent Bank Group, Inc. should be read in conjunction with the consolidated financial statements and the notes thereto. Balance Sheets December 31, Assets 2022 2021 Cash and cash equivalents $ 5,660 $ 10,747 Investment in subsidiaries 2,701,273 2,904,395 Investment in trusts 1,724 1,724 Other assets 3,511 3,039 Total assets $ 2,712,168 $ 2,919,905 Liabilities and Stockholders' Equity Other borrowings $ 267,066 $ 283,371 Junior subordinated debentures 54,419 54,221 Other liabilities 5,300 5,663 Total liabilities 326,785 343,255 Stockholders' equity: Preferred stock — — Common stock 412 428 Additional paid-in capital 1,959,193 1,945,497 Retained earnings 638,354 625,484 Accumulated other comprehensive (loss) income (212,576) 5,241 Total stockholders' equity 2,385,383 2,576,650 Total liabilities and stockholders' equity $ 2,712,168 $ 2,919,905 Statements of Income Years Ended December 31, 2022 2021 2020 Interest expense: Interest on other borrowings $ 14,450 $ 15,247 $ 12,446 Interest on junior subordinated debentures 2,713 1,756 2,162 Total interest expense 17,163 17,003 14,608 Noninterest income: Dividends from subsidiaries 208,665 134,547 83,314 Other — 61 — Total noninterest income 208,665 134,608 83,314 Noninterest expense: Salaries and employee benefits 14,886 10,546 8,346 Professional fees 736 126 202 Acquisition expense, including legal — — 16,225 Other 2,738 2,510 2,424 Total noninterest expense 18,360 13,182 27,197 Income before income tax benefit and equity in undistributed income of subsidiaries 173,142 104,423 41,509 Income tax benefit 8,454 7,131 9,410 Income before equity in undistributed income of subsidiaries 181,596 111,554 50,919 Equity in undistributed income of subsidiaries 14,695 113,196 150,290 Net income $ 196,291 $ 224,750 $ 201,209 Statements of Cash Flows Years Ended December 31, 2022 2021 2020 Cash flows from operating activities: Net income $ 196,291 $ 224,750 $ 201,209 Adjustments to reconcile net income to net cash provided by operating activities: Equity in undistributed net income of subsidiaries (14,695) (113,196) (150,290) Amortization of discount and origination costs on borrowings 893 894 720 Stock based compensation expense 13,697 10,691 8,450 Excess tax (benefit) expense on restricted stock vested (703) (691) 243 Deferred tax (benefit) expense (579) (210) 96 Net change in other assets 107 1,020 (590) Net change in other liabilities 140 500 (952) Net cash provided by operating activities 195,151 123,758 58,886 Cash flows from investing activities: Capital investment in subsidiaries — — (120,000) Net cash used in investing activities — — (120,000) Cash flows from financing activities: Proceeds from other borrowings 111,000 75,000 148,653 Repayments of other borrowings (128,000) (104,500) (39,250) Repurchase of common stock (119,746) (32,132) (5,819) Dividends paid (63,492) (56,861) (45,265) Net cash (used in) provided by financing activities (200,238) (118,493) 58,319 Net change in cash and cash equivalents (5,087) 5,265 (2,795) Cash and cash equivalents at beginning of year 10,747 5,482 8,277 Cash and cash equivalents at end of year $ 5,660 $ 10,747 $ 5,482

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2022
Subsequent Events [Abstract]
Subsequent Events	Note 22. Subsequent Events Declaration of dividends On January 19, 2023, the Company declared a quarterly cash dividend in the amount of $0.38 per share of common stock to the stockholders of record on February 6, 2023. The dividend totaling $15,644 was paid on February 16, 2023. Stock repurchase program renewal On January 19, 2023, the Company approved the renewal of its stock repurchase program. The program authorizes the Company to repurchase up to $125 million of the Company's common stock. The repurchase program is authorized to continue through December 31, 2023. No shares have been repurchased by the Company under this program through the date of this report. Line of credit agreement On February 16, 2023, the Company renewed its $100,000 unsecured revolving line of credit with a maturity date of February 16, 2024. As of February 21, 2023, the Company has no borrowings against its revolving line of credit.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2022
Accounting Policies [Abstract]
Basis of Presentation	Basis of presentation: The accompanying consolidated financial statements include the accounts of IBG and all other entities in which IBG has controlling financial interest. All material intercompany transactions and balances have been eliminated in consolidation. In addition, the Company wholly-owns nine statutory business trusts that were formed for the purpose of issuing trust preferred securities and do not meet the criteria for consolidation (See Note 11. Junior Subordinated Debentures ). Accounting standards codification: The Financial Accounting Standards Board's (FASB) Accounting Standards Codification (ASC) is the officially recognized source of authoritative U.S. generally accepted accounting principles (GAAP) applicable to all public and non-public non-governmental entities. Rules and interpretive releases of the SEC under the authority of federal securities laws are also sources of authoritative GAAP for SEC registrants. All other accounting literature is considered non-authoritative.
Segment Reporting	Segment reporting: The Company has one reportable segment. The Company’s chief operating decision-maker uses consolidated results to make operating and strategic decisions.
Reclassifications	Reclassifications: Certain prior period financial statement and disclosure amounts have been reclassified to conform to current period presentation. The reclassifications have no effect on net income or stockholders' equity as previously reported.
Use of estimates	Use of estimates: The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect certain reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Accordingly, actual results could differ from those estimates. The material estimates included in the financial statements relate to the allowance for credit losses, the valuation of goodwill and valuation of assets and liabilities acquired in business combinations.
Cash and cash equivalents	Cash and cash equivalents: For the purposes of reporting cash flows, cash and cash equivalents include cash on hand, amounts due from banks and federal funds sold. All highly liquid investments with an initial maturity of less than ninety days are considered to be cash equivalents. The Company maintains deposits with other financial institutions in amounts that exceed FDIC insurance coverage. The Company's management monitors the balance in these accounts and periodically assesses the financial condition of the other financial institutions. The Company has not experienced any losses in such accounts and believes it is not exposed to any significant credit risks on cash or cash equivalents.
Restricted cash	Restricted cash: The Company maintains cash collateral balances which have been pledged to derivative counterparties and are legally restricted as to use.
Certificates of deposit	Certificates of deposit: Certificates of deposit are FDIC insured deposits in other financial institutions with original maturities of five years or less and are carried at cost.
Securities	Securities: Debt securities that management has the positive intent and ability to hold to maturity are classified as held to maturity and recorded at amortized cost. Debt securities that the Company intends to hold for an indefinite period of time, but not necessarily to maturity are classified as available for sale. Securities available for sale are reported at fair value with unrealized gains or losses reported as a separate component of other comprehensive income, net of tax. Any decision to sell a security classified as available for sale would be based on various factors, including significant movements in interest rates, changes in the maturity mix of the Company's assets and liabilities, liquidity needs, regulatory capital considerations and other similar factors.
Loans held for sale	Loans held for sale: The Company originates residential mortgage loans that may subsequently be sold to unaffiliated third parties. The Company elected the fair value option for certain residential mortgage loans held for sale in accordance with ASC 825, Financial Instruments. This election allows for a more effective offset of the changes in fair values of the loans and the derivative instruments used to economically hedge them without the burden of complying with the requirements for hedge accounting under ASC 815, Derivatives and Hedging . The Company has not elected the fair value option for other residential mortgage loans held for sale primarily because they are not economically hedged using derivative instruments. Mortgage loans originated and intended for sale not recorded under the fair value option are carried at the lower of aggregate cost or fair value, as determined by aggregate outstanding commitments from investors. Net unrealized losses, if any, are recognized through a valuation allowance by charges to income. All mortgage loans held for sale are sold without servicing rights retained. Gains and losses on sales of loans are recognized in noninterest income at settlement dates and are determined by the difference between the sales proceeds and the carrying value of the loans.
Loans held for investment	Loans held for investment: Loans that management has the intent and ability to hold for the foreseeable future or until maturity or pay-off are reported at their outstanding principal balance, net of unearned interest, purchase premiums and discounts, deferred loan fees or costs and an allowance for credit losses. Loan origination fees, net of direct origination costs, are deferred and recognized as an adjustment to the related loan yield using the effective interest method without anticipating prepayments. Further information regarding the Company's accounting policies related to past due loans, non-accrual loans, collateral dependent loans and troubled-debt restructurings is presented in Note 5. Loans, Net and Allowance for Credit Losses on Loans .
Acquired loans	Acquired loans: In accordance with ASC 326, Measurement of Credit Losses on Financial Instruments , loans acquired in connection with a business combination are recorded at their acquisition-date fair value. The allowance for credit losses related to the acquired loan portfolio is not carried over. Acquired loans are classified into two categories based on the credit risk characteristics of the underlying borrowers as either purchased credit deteriorated (PCD) loans, or loans with no evidence of credit deterioration (non-PCD). PCD loans are defined as a loan or pool of loans that have experienced more-than-insignificant credit deterioration since the origination date. For PCD loans, an initial allowance is established on the acquisition date using the same methodology as other loans held for investment and combined with the fair value of the loan to arrive at acquisition date amortized cost. Accordingly, no provision for credit losses is recognized on PCD loans at the acquisition date. Subsequent to the acquisition date, changes to the allowance are recognized in the provision for credit losses. Non-PCD loans are pooled into segments together with originated held for investment loans that share similar risk characteristics and have an allowance established on the acquisition date, which is recognized in the current period provision for credit losses.
Allowance for Credit Losses on Loans	Allowance for credit losses - loans : The allowance for credit losses on loans is a valuation account that is deducted from the amortized cost basis of loans to present management's best estimate of the net amount expected to be collected. Loans, or portions thereof, are charged-off against the allowance for credit losses when management believes that collectability of the principal is unlikely. Subsequent recoveries, if any, are credited to the allowance. The allowance is increased (decreased) by provisions (or reversals of) reported in the income statement as a component of provision for credit losses. Management has made the accounting policy election to exclude accrued interest receivable on loans from the estimate of credit losses and reports accrued interest separately in other assets in the consolidated balance sheets. Further information regarding Company policies and methodology used to estimate the allowance for credit losses on loans is presented in Note 5. Loans, Net and Allowance for Credit Losses on Loans .
Allowance for credit losses on securities	Allowance for credit losses - available for sale securities: For available for sale securities in an unrealized loss position, the Company first assesses whether it intends to sell or it is more-likely-than-not that it will be required to sell the securities before recovery of the amortized cost basis. If either of these criteria is met, the securities amortized cost basis is written down to fair value as a current period expense. If either of the above criteria is not met, the Company evaluates whether the decline in fair value is the result of credit losses or other factors. In making this assessment, management may consider various factors including the extent to which fair value is less than amortized cost, performance of any underlying collateral and adverse conditions specifically related to the security, among other factors. If this assessment indicates that a credit loss exists, the present value of cash flows expected to be collected are compared to the amortized cost basis of the security and any excess of the amortized cost basis over the present value of expected cash flows is recorded as an allowance for credit loss, limited to the amount by which the fair value is less than the amortized cost basis. Any impairment not recorded through an allowance for credit loss is recognized in other comprehensive income as a non credit-related impairment. Changes in the allowance for credit losses are recorded as provision for (or reversal of) credit losses. Available for sale securities are charged-off against the allowance or, in the absence of any allowance, written down through income when deemed uncollectible by management or when either of the aforementioned criteria regarding intent or requirement to sell is met. Allowance for credit losses - held to maturity securities : The allowance for credit losses on held to maturity securities is a valuation account that is deducted from the amortized cost basis of held to maturity securities to present management's best estimate of the net amount expected to be collected. Held to maturity securities are charged-off against the allowance when deemed uncollectible by management. Adjustments to the allowance are reported in the income statement as a component of provision for credit losses. Management measures expected credit losses on held to maturity securities on a collective basis by major security type with each type sharing similar risk characteristics and considers historical credit loss information that is adjusted for current conditions and reasonable and supportable forecasts. Management has made the accounting policy election to exclude accrued interest receivable on available for sale and held to maturity securities from the estimate of credit losses and report accrued interest separately in other assets in the consolidated balance sheet.
Allowance for credit losses on off-balance-sheet credit exposures	Allowance for credit losses on off-balance sheet credit exposures: The allowance for credit losses on off-balance sheet credit exposures is a liability account, calculated in accordance with ASC 326, representing expected credit losses over the contractual period for which the Company is exposed to credit risk resulting from a contractual obligation to extend credit. No allowance is recognized if we have the unconditional right to cancel the obligation. The allowance is reported as a component of other liabilities in the consolidated balance sheets. Adjustments to the allowance are reported in the income statement as a component of provision for credit losses. Further information regarding Company policies and methodology used to estimate the allowance for credit losses on off-balance sheet credit exposures is presented in Note 13. Off-Balance Sheet Arrangements, Commitments and Contingencies . Loan commitments and related financial instruments: In the ordinary course of business, the Company has entered into certain off-balance sheet financial instruments consisting of commitments to extend credit, commercial letters of credit, and standby letters of credit. Such financial instruments are recorded in the financial statements when they are funded or related fees are incurred or received.
Premises and equipment, net	Premises and equipment, net: Land is carried at cost. Bank premises, furniture and equipment and aircraft are carried at cost, less accumulated depreciation computed principally by the straight-line method over the estimated useful lives of the assets, which range from three Leasehold improvements are carried at cost and are depreciated over the shorter of the estimated useful life or the lease period.
Software	Software: Costs incurred in connection with development or purchase of internal use software and cloud computing arrangements, including in-substance software licenses, are capitalized. Amortization is computed on a straight-line basis over the estimated useful life of the asset, which generally ranges from one
Leases	Leases: The Company's leases are accounted for under ASC Topic 842, Leases . For operating leases with a term greater than one year, the Company recognizes operating right-of-use (ROU) lease assets and operating lease liabilities, which are recorded in other assets and other liabilities, respectively, in the consolidated balance sheets. The Company determines if an arrangement is a lease at inception. Operating ROU lease assets and related liabilities are recognized at commencement date based on the present value of lease payments over the lease term. As the Company's leases do not provide an implicit rate, the Company uses its incremental borrowing rate referenced to the Federal Home Loan Bank Secure Connect advance rates for borrowings of similar terms in determining the present value of lease payments. The operating ROU lease asset also includes any lease pre-payments made and excludes lease incentives. The Company's lease terms may include options to extend or terminate the lease when it is reasonably certain that the Company will exercise that option. Lease expense for lease payments is recognized on a straight-line basis over the lease term. The Company has lease agreements with lease and non-lease components, which the Company has elected to account for separately as the non-lease component amounts are readily determinable under most leases.
Long-term assets	Long-term assets: Premises and equipment and other long-term assets are reviewed for impairment when events indicate that their carrying amount may not be recoverable from future undiscounted cash flows. If impaired, the assets are recorded at fair value.
Other real estate owned	Other real estate owned: Real estate properties acquired through, or in lieu of, loan foreclosure are initially recorded at fair value less estimated selling costs at the date of foreclosure, establishing a new cost basis. After foreclosure, valuations are periodically performed by management and the real estate is carried at the lower of carrying amount or fair value less cost to sell. Revenue and expenses from operations of other real estate owned and impairment charges on other real estate are included in noninterest expense. Gains and losses on sale of other real estate are included in noninterest income.
Goodwill and other intangible assets, net	Goodwill and other intangible assets, net: Goodwill represents the excess of costs over fair value of net assets of businesses acquired. Goodwill is tested for impairment annually on December 31 or on an interim basis if an event triggering impairment may have occurred. If a reporting unit’s carrying amount exceeds its fair value, an entity will record an impairment charge based on that difference. As of December 31, 2022, the fair value of the Company’s stock price and calculated market capitalization exceeded its carrying value.
Restricted stock	Restricted stock : The Bank is a member of the FHLB system. Members are required to own a certain amount of stock based on the level of borrowings and other factors, and may invest in additional amounts. FHLB of Dallas and other restricted stock do not have readily determinable fair values as ownership is restricted and they lack a ready market. As a result, these stocks are carried at cost and evaluated periodically by management for impairment. Both cash and stock dividends are reported as income.
Bank-owned life insurance	Bank-owned life insurance: Bank-owned life insurance is recorded at the amount that can be realized under the insurance contracts at the balance sheet date, which is the cash surrender value adjusted for other charges or other amounts due that are probable at settlement. Changes in the net cash surrender value of the policies, as well as insurance proceeds received are reflected in noninterest income.
Income taxes	Income taxes: Income tax expense is the total of the current year income tax due or refundable and the change in deferred tax assets and liabilities (excluding deferred tax assets and liabilities related to business combinations or components of other comprehensive income). Deferred tax assets and liabilities are the expected future tax amounts for the temporary differences between carrying amounts and tax bases of assets and liabilities, computed using enacted tax rates. The effect of a change in tax rates on deferred assets and liabilities is recognized in income taxes during the period that includes the enactment date. A valuation allowance, if needed, reduces deferred tax assets to the expected amount more likely than not to be realized. Realization of deferred tax assets is dependent upon the level of historical income, prudent and feasible tax planning strategies, reversals of deferred tax liabilities and estimates of future taxable income.
Stock based compensation	Stock based compensation: Compensation cost is recognized for restricted stock awards/stock units issued to employees based on the market price of the Company's common stock on the grant date. Stock-based compensation expense is generally recognized using the straight-line method over the requisite service period for time-based awards. Compensation expense for performance stock units is recognized over the service period of the award based upon the probable number of units expected to vest. The impact of forfeitures of stock-based payment awards on compensation expense is recognized as forfeitures occur.
Transfers of financial assets	Transfers of financial assets: Transfers of financial assets are accounted for as sales, when control over the assets has been relinquished. Control over transferred assets is deemed to be surrendered when the assets have been isolated from the Company, the transferee obtains the right (free of conditions that constrain it from taking advantage of that right) to pledge or exchange the transferred assets, and the Company does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity.
Advertising costs	Advertising costs: Advertising costs are expensed as incurred.
Business combinations	Business combinations: The Company applies the acquisition method of accounting for business combinations. Under the acquisition method, the acquiring entity in a business combination recognizes 100% of the assets acquired and liabilities assumed at their acquisition date fair values. Management utilizes valuation techniques appropriate for the asset or liability being measured in determining these fair values. Any excess of the purchase price over amounts allocated to assets acquired, including identifiable intangible assets, and liabilities assumed is recorded as goodwill. Where amounts allocated to assets acquired and liabilities assumed is greater than the purchase price, a bargain purchase gain is recognized. Adjustments identified during the measurement period are recognized in the reporting period in which the adjustment amounts are determined. Acquisition-related costs are expensed as incurred.
Comprehensive income	Comprehensive income: Accounting principles generally require that recognized revenue, expenses, gains and losses be included in net income. Although certain changes in assets and liabilities, such as unrealized gains and losses on available for sale securities, are reported as a separate component of the equity section of the balance sheet, such items, along with net income, are components of comprehensive income. Gains and losses on available for sale securities are reclassified to net income as the gains or losses are realized upon sale of the securities. For securities transferred from available for sale to the held to maturity classification, the remaining pre-tax gains and losses will be amortized over the remaining life of the securities, as an adjustment of yield on the transferred securities. For cash flow hedges, gains and losses on the derivative(s) are recorded in accumulated other comprehensive income and subsequently reclassified into interest income in the same period that the hedged transaction affects earnings.
Fair values of financial instruments	Fair values of financial instruments: Accounting standards define fair value, establish a framework for measuring fair value in GAAP, and require certain disclosures about fair value measurements (see Note 17. Fair Value Measurements ). In general, fair values of financial instruments are based upon quoted market prices, where available. If such quoted market prices are not available, fair value is based upon 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. These adjustments may include amounts to reflect counterparty credit quality and the Company's creditworthiness, among other things, as well as unobservable parameters. Any such valuation adjustments are applied consistently over time. The fair value of an asset or liability is the price that would be received to sell that asset or paid to transfer that liability in an orderly transaction occurring in the principal market (or most advantageous market in the absence of a principal market) for such asset or liability. In estimating fair value, the Company utilizes valuation techniques that are consistent with the market approach, the income approach and/or the cost approach. Such valuation techniques are consistently applied. Inputs to valuation techniques include the assumptions that market participants would use in pricing an asset or liability. ASC Topic 820, Fair Value Measurements and Disclosures , 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 might 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 (such as interest rates, volatilities, prepayment speeds, credit risks, etc.) or inputs that are derived principally from or corroborated by market data by correlation or other means. Level 3 Inputs – Unobservable inputs for determining the fair values of assets or liabilities that reflect an entity’s own assumptions about the assumptions that market participants would use in pricing the assets or liabilities. The Company elected the fair value option for certain residential mortgage loans held for sale in accordance with ASC 825, Financial Instruments. This election allows for a more effective offset of the changes in fair values of the loans and the derivative instruments used to economically hedge them without the burden of complying with the requirements for hedge accounting under ASC 815, Derivatives and Hedging Investment securities available for sale Securities classified as available for sale are reported at fair value utilizing Level 1 and Level 2 inputs. Securities are classified within Level 1 when quoted market prices are available in an active market. Inputs include securities that have quoted prices in active markets for identical assets. For securities utilizing Level 2 inputs, the Company obtains fair value measurements from an independent pricing service. The fair value measurements consider observable data that may include dealer quotes, market spreads, cash flows, the U.S. Treasury and other yield curves, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the security’s terms and conditions, among other things. Loans held for sale Certain mortgage loans held for sale are measured at fair value on a recurring basis due to the Company's election to adopt fair value accounting treatment for those loans originated for which the Company has entered into certain derivative financial instruments as part of its mortgage banking and related risk management activities. These instruments include interest rate lock commitments and mandatory forward commitments to sell these loans to investors known as forward mortgage-backed securities trades. This election allows for a more effective offset of the changes in fair values of the assets and the mortgage related derivative instruments used to economically hedge them without the burden of complying with the requirements for hedge accounting under ASC 815, Derivatives and Hedging . Mortgage loans held for sale, for which the fair value option was elected, which are sold on a servicing released basis, are valued using a market approach by utilizing either: (i) the fair value of 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 to 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. For mortgage loans held for sale for which the fair value option was elected, the earned current contractual interest payment is recognized in interest income, loan origination costs and fees on fair value option loans are recognized in earnings as incurred and not deferred. The Company has no continuing involvement in any residential mortgage loans sold. Derivatives The Company utilizes interest rate swaps to hedge exposure to interest rate risk and variability of cash flows associated to changes in the underlying interest rate of the hedged item. These hedging interest rate swaps are classified as a cash flow hedge. The Company utilizes a third-party vendor for derivative valuation purposes. These vendors determine the appropriate fair value based on a net present value calculation of the cash flows related to the interest rate swaps using primarily observable market inputs such as interest rate yield curves (Level 2 inputs). The estimated fair values of interest rate lock commitments utilize 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 interest rate lock commitments 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, as the valuations are based on observable market inputs. Forward mortgage-backed securities trades are exchange-traded or traded within highly active dealer markets. In order to determine the fair value of these instruments, the Company utilized the exchange price or dealer market price for the particular derivative contract; therefore these contracts are classified as Level 2. The estimated fair values are subject to change primarily due to changes in interest rates. The Company also enters into certain interest rate derivative positions. The estimated fair value of these commercial loan interest rate swaps are obtained from a pricing service that provides the swaps' unwind value (Level 2 inputs). See Note 18. Derivative Financial Instruments , for more information. Individually evaluated loans are measured at an observable market price (if available) or at the fair value of the loan’s underlying collateral (if collateral dependent). Fair value of the loan’s collateral is determined by appraisals or independent valuation, which is then adjusted for the estimated costs related to liquidation of the collateral. Management’s ongoing review of appraisal information may result in additional discounts or adjustments to valuation based upon more recent market sales activity or more current appraisal information derived from properties of similar type and/or locale. In addition, management's discounting criteria may vary for loans secured by non-real estate collateral such as inventory, oil and gas reserves, accounts receivable, equipment or other business assets. Management reviews the appraisals or valuations for appropriateness and adjusts the value downward to consider selling and closing costs, which typically range from 5% to 8% of the appraised value. Therefore, the Company has categorized its individually evaluated loans as Level 3. Other real estate owned is measured at fair value on a nonrecurring basis (upon initial recognition or subsequent impairment). Other real estate owned is classified within Level 3 of the valuation hierarchy. When transferred from the loan portfolio, other real estate owned is adjusted to fair value less estimated selling costs and is subsequently carried at the lower of carrying value or fair value less estimated selling costs. The fair value is determined using an external appraisal process, discounted based on internal criteria. Management reviews the external appraisals for appropriateness and adjusts the value downward to consider selling and closing costs, which typically range from 5% to 8% of the appraised value. Therefore, the Company has categorized its other real estate as Level 3. There was no other real estate owned remeasured during the year ended December 31, 2021. The methods and assumptions used by the Company in estimating fair values of financial instruments as disclosed herein in accordance with ASC Topic 825, Financial Instruments , other than for those measured at fair value on a recurring and nonrecurring basis discussed above, are as follows: Cash and cash equivalents: The carrying amounts of cash and cash equivalents approximate their fair value. Certificates of deposit held in other banks: The fair value of certificates of deposit held in other banks is based upon current market rates. Investment securities held to maturity: For investment securities held to maturity, the Company obtains fair value measurements from an independent pricing service. The fair value measurements consider observable data that may include dealer quotes, market spreads, cash flows, the U.S. Treasury and other yield curves, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the security's terms and conditions, among other things. Loans held for sale, at cost: The fair value of loans held for sale is determined based upon commitments on hand from investors. Loans: A discounted cash flow model is used to estimate the fair value of the loans. The discounted cash flow approach models the credit losses directly in the projected cash flows, applying various assumptions regarding credit, interest and prepayment risks for the loans based on loan types, payment types and fixed or variable classifications. Federal Home Loan Bank of Dallas and other restricted stock: The carrying value of restricted securities such as stock in the Federal Home Loan Bank of Dallas and Independent Bankers Financial Corporation approximates fair value. Deposits: The fair values disclosed for demand deposits are, by definition, equal to the amount payable on demand at the reporting date (that is their carrying amounts). The carrying amounts of variable-rate certificates of deposit (CDs) approximate their fair values at the reporting date. Fair values for fixed-rate CDs are estimated using a discounted cash flow calculation that applies interest rates currently being offered on certificates to a schedule of aggregated expected monthly maturities on time deposits. Federal Home Loan Bank advances, line of credit and federal funds purchased: The fair value of advances maturing within 90 days approximates carrying value. Fair value of other advances is based on the Company’s current borrowing rate for similar arrangements. Other borrowings: The estimated fair value approximates carrying value for short-term borrowings. The fair value of private subordinated debentures is based upon prevailing rates on similar debt in the market place. The subordinated debentures that are publicly traded are valued based on indicative bid prices based upon market pricing observations in the current market. Junior subordinated debentures: The fair value of junior subordinated debentures is estimated using discounted cash flow analyses based on the published Bloomberg US Financials BB rated corporate bond index yield. Accrued interest: The carrying amounts of accrued interest approximate their fair values. Off-balance sheet instruments: Fair values for off-balance sheet, credit-related financial instruments are based on fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements and the counterparties' credit standing. The fair value of commitments is not material.
Derivative financial instruments	Derivative financial instruments: The Company enters into certain derivative financial instruments: interest rate lock commitments, forward mortgage-backed securities trades and interest rate swaps. The accounting for changes in fair value depends on the intended use of the derivative. Changes in fair value of derivatives designated in a qualifying hedge relationship are recorded in accumulated other comprehensive income. Changes in fair value of derivatives not designated in a qualifying hedge relationship are recognized directly in earnings. All derivatives are carried at fair value in either other assets or other liabilities. See Note 18. Derivative Financial Instruments for further information regarding Company policy.
Mortgage banking	Mortgage banking: This revenue category reflects the Company's mortgage production revenue, including fees and income derived from mortgages originated with the intent to sell, gains on sales of mortgage loans and the initial and subsequent changes in the fair value of the mortgage derivatives. Interest earned on mortgage loans is recorded in interest income.
Revenue recognition	Revenue recognition: ASC Topic 606, R evenue from Contracts with Customers (ASC 606) , establishes principles for reporting information about the nature, amount, timing and uncertainty of revenue and cash flows arising from the entity's contracts to provide goods or services to customers. The core principle requires an entity to recognize revenue to depict the transfer of goods or services to customers in an amount that reflects the consideration that it expects to be entitled to receive in exchange for those goods or services recognized as performance obligations are satisfied. The majority of the Company's revenue-generating transactions are not subject to ASC 606, including revenue generated from financial instruments, such as loans, letters of credit, and investment securities, as well as revenue related to mortgage banking activities, and BOLI, as these activities are subject to other accounting guidance. Descriptions of revenue-generating activities that are within the scope of ASC 606, and are presented in the accompanying Consolidated Statements of Income as components of noninterest income, are as follows: • Service charges on deposit accounts - these represent general service fees for monthly account maintenance and activity or transaction-based fees and consist of transaction-based revenue, time-based revenue (service period), item-based revenue or some other individual attribute-based revenue. Revenue is recognized when the performance obligation is completed which is generally monthly for account maintenance services or when a transaction has been completed (such as a wire transfer). Payment for such performance obligations are generally received at the time the performance obligations are satisfied. • Investment management - includes income related to providing investment management services to customers under investment management contracts. Also included are fees received from a third party broker-dealer as part of a revenue-sharing agreement for fees earned from customers that are referred to a third party. The investment management fees and referral fees are billed and paid on a quarterly basis and recognized ratably throughout the quarter as performance obligations are satisfied. • Mortgage warehouse purchase program fees - includes fees for the administration and funding of mortgage loans, as well as renewal and application fees received from mortgage originator customers through our mortgage warehouse purchase program. Revenue related to the warehouse program is recognized when the related loan interest is paid off or upon renewal or application. • Gains and losses on the sale of other real estate owned - generally recognized when the performance obligation is complete which is typically at delivery of control over the property to the buyer at time of each real estate closing. • Other noninterest income - includes the Company's correspondent bank earnings credit, acquired loan recoveries, other deposit fees, and merchant interchange income. The majority of these fees in other noninterest income are not subject to the requirements of ASC 606. The other deposit fees and merchant interchange income are in the scope of ASC 606, and payment for such performance obligations are generally received at the time the performance obligations are satisfied. The Company has made no significant judgments in applying the revenue guidance prescribed in ASC 606 that affect the determination of the amount and timing of revenue from the above-described contracts with customers.
Subsequent events	Subsequent events: Companies are required to evaluate events and transactions that occur after the balance sheet date but before the date the financial statements are issued. They must recognize in the financial statements the effect of all events or transactions that provide additional evidence of conditions that existed at the balance sheet date, including the estimates inherent in the financial statement preparation process. Entities shall not recognize the impact of events or transactions that provide evidence about conditions that did not exist at the balance sheet date but arose after that date. The Company has evaluated subsequent events through the date of filing these financial statements with the Securities and Exchange Commission (SEC) and noted no subsequent events requiring financial statement recognition or disclosure, except as disclosed in Note 22. Subsequent Events .
Earnings per share	Earnings per share: Basic earnings per common share is calculated as net income available to common shareholders divided by the weighted average number of common shares outstanding during the period. The unvested share-based payment awards that contain rights to non-forfeitable dividends are considered participating securities for this calculation. Diluted earnings per common share includes the dilutive effect of additional potential common shares issuable under participating nonvested restricted stock awards as well as performance stock units (PSUs). The participating nonvested restricted stock awards were not included in dilutive shares as they were anti-dilutive for the years ended December 31, 2022, 2021 and 2020. Proceeds from the assumed exercise of dilutive participating nonvested restricted stock awards and PSUs are assumed to be used to repurchase common stock at the average market price.
Recent accounting pronouncements	Adoption of accounting standards ASU 2022-06, Reference Rate Reform (Topic 848): Deferral of the Sunset Date of Topic 848. ASU 2022-06 extends the period of time preparers can utilize the reference rate reform relief guidance provided by ASU 2020-04 and ASU 2021-01, which are discussed below. ASU 2022-06, which was effective upon issuance, defers the sunset date of this prior guidance from December 31, 2022 to December 31, 2024, after which entities will no longer be permitted to apply the relief guidance in Topic 848. The adoption of ASU 2022-06 did not significantly impact the financial statements. ASU 2016-13, Financial Instruments - Credit Losses (Topic 326) (ASC 326): Measurement of Credit Losses on Financial Instruments (ASU 2016-13). On January 1, 2021, the Company adopted ASU 2016-13 and related amendments. The measurement of current expected credit losses (CECL) methodology is applicable to financial assets measured at amortized cost, including loan receivables and held to maturity debt securities. It also applies to off-balance sheet credit exposures not accounted for as insurance (loan commitments, standby letters of credit, financial guarantees, and other similar instruments). The CECL model requires the measurement of all expected credit losses on applicable financial assets based on historical experience, current conditions, and reasonable and supportable forecasts. In addition, ASU 2016-13 includes certain changes to the accounting for available for sale securities such as requiring credit-related impairments to be recognized as an allowance for credit losses rather than as a direct write-down of the securities amortized cost basis when management does not intend to sell or believes that it is more likely than not they will be required to sell securities prior to recovery of the securities amortized cost basis. The Company adopted ASU 2016-13 using the modified retrospective method for all financial assets measured at amortized cost and off-balance sheet credit exposures. As a result of this adoption, the Company recognized a cumulative effect reduction to retained earnings totaling $53,880, net of a recorded deferred tax asset of $15,113, and reclassed $13,035 of allowance for credit loss related to financial assets purchased with credit deterioration (PCD) that were previously classified as purchased credit impaired (PCI) and accounted for under ASC 310-30 as discussed below. Results for periods beginning after January 1, 2021 are presented in accordance with ASU 2016-13 while prior period amounts continue to be reported in accordance with previously applicable GAAP. The Company adopted ASU 2016-13 using the prospective transition approach for PCD assets. In accordance with the standard, management did not reassess whether PCI assets met the criteria of PCD assets as of the date of adoption. On January 1, 2021, the amortized cost basis of the PCD assets were adjusted to reflect the addition of the allowance for credit losses. The remaining noncredit discount (based on the adjusted amortized cost basis) was accreted into interest income at the effective interest rate as of January 1, 2021. The following table illustrates the impact of ASU 2016-13 on the allowances for credit losses as of January 1, 2021, the date of adoption: January 1, 2021 Pre-Adoption Allowance Impact of Adoption Initial allowance on loans purchased with credit deterioration Post-Adoption Allowance Assets: Allowance for credit losses on Loans: Commercial $ 27,311 $ 12,775 $ 4,328 $ 44,414 Commercial real estate 36,698 29,108 7,640 73,446 Commercial construction, land and land development 13,425 22,008 927 36,360 Residential real estate 6,786 (2,255) 140 4,671 Single-family interim construction 2,156 7,179 — 9,335 Agricultural 337 (178) — 159 Consumer 684 (334) — 350 Unallocated 423 (423) — — $ 87,820 $ 67,880 $ 13,035 $ 168,735 Liabilities: Allowance for credit losses on off-balance sheet credit exposures $ — $ 1,113 $ — $ 1,113 ASU 2020-08, Codification Improvements to Subtopic 310-20, Receivables - Nonrefundable Fees and Other Costs . ASU 2020-08 clarifies the accounting for the amortization of purchase premiums for callable debt securities with multiple call dates. ASU 2020-08 was effective for the Company on January 1, 2021 and did not have a significant impact on our financial statements. ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting and subsequent clarifying update ASU 2021-01 Reference Rate Reform (Topic 848); Scope. ASU 2020-04 provides temporary optional guidance to ease the potential burden in accounting for reference rate reform. The new guidance provides optional expedients and exceptions for applying GAAP to contract modifications and hedging relationships, subject to meeting certain criteria, that reference LIBOR or another reference rate expected to be discontinued. The ASU is intended to help stakeholders during the global market-wide reference rate transition period. ASU 2021-01 clarifies that certain optional expedients and exceptions in ASC 848 for contract modifications and hedge accounting apply to derivatives that are affected by the discounting transition. ASU 2021-01 also amends the expedients and exceptions in ASC 848 to capture the incremental consequences of the scope clarification and to tailor the existing guidance to derivative instruments affected by the discounting transition. These ASUs were effective upon issuance and based upon the amendment provided in ASU 2022-06 discussed above, can generally be applied through December 31, 2024. The adoption of these ASUs did not significantly impact our financial statements or disclosures. ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes. The guidance issued in this update simplified the accounting for income taxes by eliminating certain exceptions to the guidance in ASC 740 related to the approach for intraperiod tax allocation, the methodology for calculating income taxes in an interim period and the recognition for deferred tax liabilities for outside basis differences. ASU 2019-12 also simplified aspects of the accounting for franchise taxes and enacted changes in tax laws or rates and clarified the accounting for transactions that result in a step-up in the tax basis of goodwill. ASU 2019-12 was effective for the Company on January 1, 2021 and did not have a significant impact on our financial statements. Newly issued but not yet effective accounting standards ASU 2022-01, Derivatives and Hedging (Topic 815): Fair Value Hedging - Portfolio Layer Method. Under prior guidance, entities can apply the last-of-layer hedging method to hedge the exposure of a closed portfolio of prepayable financial assets to fair value changes due to changes in interest rates for a portion of the portfolio that is not expected to be affected by prepayments, defaults, and other events affecting the timing and amount of cash flows. ASU 2022-01 expands the last-of-layer method, which permits only one hedge layer, to allow multiple hedged layers of a single closed portfolio. To reflect that expansion, the last-of-layer method is renamed the portfolio layer method. ASU 2022-01 also (i) expands the scope of the portfolio layer method to include non-prepayable financial assets, (ii) specifies eligible hedging instruments in a single-layer hedge, (iii) provides additional guidance on the accounting for and disclosure of hedge basis adjustments under the portfolio layer method and (iv) specifies how hedge basis adjustments should be considered when determining credit losses for the assets included in the closed portfolio. ASU 2022-01 will be effective for the Company on January 1, 2023. The adoption of ASU 2022-01 is not expected to have a significant impact on the financial statements. ASU 2022-02, Financial Instruments - Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures. ASU 2022-02 eliminates the accounting guidance for troubled debt restructurings in ASC Subtopic 310-40, Receivables - Troubled Debt Restructurings by Creditors , while enhancing disclosure requirements for certain loan refinancings and restructurings by creditors when a borrower is experiencing financial difficulty. Additionally, ASU 2022-02 requires entities to disclose current-period gross write-offs by year of origination for financing receivables and net investments in leases within the scope of ASC Subtopic 326-20, Financial Instruments - Credit Losses - Measured at Amortized Cost . ASU 2022-02 will be effective for the Company on January 1, 2023. The adoption of ASU 2022-02 is not expected to have a significant impact on the financial statements.
Mortgage warehouse purchase loans	The Company has a mortgage warehouse purchase program providing mortgage inventory financing for residential mortgage loans originated by mortgage banker clients across a broad geographic scale. Proceeds from the sale of mortgages is the primary source of repayment for warehouse inventory financing via approved investor takeout commitments. These loans typically have a very short duration ranging between a few days to 15 days. In some cases, loans to larger mortgage originators may be financed for up to 60 days. Warehouse purchase program loans are collectively evaluated for impairment and are purchased under several contractual requirements, providing safeguards to the Company. To date, the Company has not experienced a loss on these loans and no allowance for credit losses has been allocated to them.
Loan charge off amounts	The Company will charge-off that portion of any loan which management considers a loss. Commercial and real estate loans are generally considered for charge-off when exposure beyond collateral coverage is apparent and when no further collection of the loss portion is anticipated based on the borrower’s financial condition.
Nonaccrual loan and lease status	The accrual of interest is discontinued on a loan when management believes that, after considering collection efforts and other factors, the borrower's financial condition is such that collection of interest is doubtful, as well as when required by regulatory provisions. Regulatory provisions would typically require the placement of a loan on non-accrual status if 1) principal or interest has been in default for a period of 90 days or more unless the loan is both well secured and in the process of collection or 2) full payment of principal and interest is not expected. All interest accrued but not collected for loans that are placed on nonaccrual status or charged-off is reversed against interest income. Cash collections on nonaccrual loans are generally credited to the loan receivable balance, and no interest income is recognized on those loans until the principal balance has been collected. Loans are generally returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured.
Trouble debt restructuring	The restructuring of a loan is considered a “troubled debt restructuring” (TDR) if both 1) the borrower is experiencing financial difficulties and 2) the creditor has granted a concession. Concessions may include interest rate reductions or below market interest rates, principal forgiveness, extending amortization and other actions intended to minimize potential losses. Modifications primarily relate to extending the amortization periods of the loans and interest rate concessions.
Loans past due	Loans are considered past due if the required principal and interest payments have not been received as of the date such payments were due.
Share repurchase plan	Stock repurchase program: From time to time, the Company's Board of Directors has authorized stock repurchase programs which allow the Company to purchase its common stock generally over a one-year period at various prices in the open market or in privately negotiated transactions. In December 2021, the Company's Board established the 2022 Stock Repurchase Plan, which provides for the repurchase of up to $160,000 of common stock through December 31, 2022. Under this program, the Company repurchased 1,651,236 shares at a total cost of $115,966 for the year ended December 31, 2022. There were 419,098 shares repurchased at a total cost of $29,241 by the Company during the year ended December 31, 2021 under a prior plan. Federal bank regulators have adopted final rules that, among other things, eliminated the standalone prior approval requirement for any repurchase of common stock. However, the Company remains subject to a Federal Reserve Board guideline that requires consultation with the Federal Reserve Board regarding plans for share repurchases. The Company’s repurchases of its common stock may be subject to a prior approval or notice requirement under other regulations, policies or supervisory expectations of the Federal Reserve Board.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2022
Accounting Policies [Abstract]
Earnings Per Share	The following table presents a reconciliation of net income available to common shareholders and the number of shares used in the calculation of basic and diluted earnings per common share. Years Ended December 31, 2022 2021 2020 Basic earnings per share: Net income $ 196,291 $ 224,750 $ 201,209 Less: Undistributed earnings allocated to participating securities 1,037 1,576 1,311 Dividends paid on participating securities 494 534 380 Net income available to common shareholders $ 194,760 $ 222,640 $ 199,518 Weighted average basic shares outstanding 41,385,516 42,666,007 42,754,606 Basic earnings per share $ 4.71 $ 5.22 $ 4.67 Diluted earnings per share: Net income available to common shareholders $ 194,760 $ 222,640 $ 199,518 Total weighted average basic shares outstanding 41,385,516 42,666,007 42,754,606 Add dilutive performance stock units 83,259 58,785 — Total weighted average diluted shares outstanding 41,468,775 42,724,792 42,754,606 Diluted earnings per share $ 4.70 $ 5.21 $ 4.67 Anti-dilutive participating securities 124,503 181,016 58,359

Accounting Policies (Tables)

Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2022
Accounting Policies [Abstract]
Accounting Standards Update and Change in Accounting Principle	The following table illustrates the impact of ASU 2016-13 on the allowances for credit losses as of January 1, 2021, the date of adoption: January 1, 2021 Pre-Adoption Allowance Impact of Adoption Initial allowance on loans purchased with credit deterioration Post-Adoption Allowance Assets: Allowance for credit losses on Loans: Commercial $ 27,311 $ 12,775 $ 4,328 $ 44,414 Commercial real estate 36,698 29,108 7,640 73,446 Commercial construction, land and land development 13,425 22,008 927 36,360 Residential real estate 6,786 (2,255) 140 4,671 Single-family interim construction 2,156 7,179 — 9,335 Agricultural 337 (178) — 159 Consumer 684 (334) — 350 Unallocated 423 (423) — — $ 87,820 $ 67,880 $ 13,035 $ 168,735 Liabilities: Allowance for credit losses on off-balance sheet credit exposures $ — $ 1,113 $ — $ 1,113

Statement of Cash Flows (Tables

Statement of Cash Flows (Tables)	12 Months Ended
	Dec. 31, 2022
Supplemental Cash Flow Elements [Abstract]
Other Supplemental Cash Flow Information	Other supplemental cash flow information is presented below: Years Ended December 31, 2022 2021 2020 Cash transactions: Interest expense paid $ 92,506 $ 65,336 $ 97,246 Income taxes paid $ 46,570 $ 58,083 $ 54,842 Noncash transactions: Deferred dividend equivalents $ 200 $ 197 $ — Transfer of loans to other real estate owned $ 23,900 $ — $ 5,239 Loans to facilitate the sale of other real estate owned $ — $ — $ 2,039 Transfer of securities available for sale to held to maturity $ 117,583 $ — $ — Right-of-use assets obtained in exchange for lease liabilities $ 4,011 $ 5,156 $ 105 Loans purchased, not yet settled $ 27,210 $ 29,332 $ 9,442

Securities (Tables)

Securities (Tables)	12 Months Ended
	Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract]
Amortized Cost of Securities and Approximate Fair Values	The amortized cost of securities and their approximate fair values at December 31, 2022 and 2021, are as follows: Amortized Cost (1) Gross Gross Fair Securities Available for Sale December 31, 2022 U.S. treasuries $ 259,675 $ — $ (20,265) $ 239,410 Government agency securities 468,994 — (84,479) 384,515 Obligations of state and municipal subdivisions 264,419 106 (13,294) 251,231 Corporate bonds 43,000 — (5,795) 37,205 Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 913,388 9 (134,924) 778,473 Other securities 950 — — 950 $ 1,950,426 $ 115 $ (258,757) $ 1,691,784 December 31, 2021 U.S. treasuries $ 174,950 $ 724 $ (678) $ 174,996 Government agency securities 453,402 1,221 (9,948) 444,675 Obligations of state and municipal subdivisions 418,554 15,440 (1,234) 432,760 Corporate bonds 33,994 862 (60) 34,796 Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 917,942 10,757 (10,149) 918,550 Other securities 950 — — 950 $ 1,999,792 $ 29,004 $ (22,069) $ 2,006,727 Securities Held to Maturity December 31, 2022 Obligations of state and municipal subdivisions $ 207,059 $ — $ (44,820) $ 162,239 ____________ (1) Excludes accrued interest receivable of $7,702 on available for sale and $2,697 on held to maturity securities at December 31, 2022 and $8,581 on available for sale securities at December 31, 2021 that is recorded in other assets on the accompanying consolidated balance sheets.
Amortized Cost and Estimated Fair Value of Securities Available for Sale by Contractual Maturity	The amortized cost and estimated fair value of securities at December 31, 2022, by contractual maturity, are shown below. Maturities of mortgage-backed securities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. December 31, 2022 Available for Sale Held to Maturity Amortized Cost (1) Fair Value Amortized Cost (1) Fair Value Due in one year or less $ 51,502 $ 50,926 $ — $ — Due from one year to five years 317,356 297,914 — — Due from five to ten years 461,073 392,682 — — Thereafter 207,107 171,789 207,059 162,239 1,037,038 913,311 207,059 162,239 Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 913,388 778,473 — — $ 1,950,426 $ 1,691,784 $ 207,059 $ 162,239 ____________ (1) Excludes accrued interest receivable of $7,702 on available for sale and $2,697 on held to maturity securities at December 31, 2022 that is recorded in other assets on the accompanying consolidated balance sheets.
Proceeds from Sale, Gross Gains and Losses of Securities Available for Sale	Proceeds from sale of securities available for sale and gross gains and gross losses for the years ended December 31, 2022, 2021 and 2020 were as follows: Years Ended December 31, 2022 2021 2020 Proceeds from sale $ — $ 9,294 $ 13,862 Gross gains $ — $ 13 $ 385 Gross losses $ — $ — $ 3
Summary of Unrealized Losses and Fair Value Securities in Continuous Unrealized Loss Position	The number of securities, unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, as of December 31, 2022 and 2021, are summarized as follows: Less Than 12 Months Greater Than 12 Months Total Description of Securities Number of Securities Estimated Unrealized Number of Securities Estimated Unrealized Estimated Unrealized Securities Available for Sale December 31, 2022 U.S. treasuries 13 $ 106,849 $ (3,923) 23 $ 132,561 $ (16,342) $ 239,410 $ (20,265) Government agency securities 13 63,451 (7,533) 62 321,064 (76,946) 384,515 (84,479) Obligations of state and municipal subdivisions 339 209,395 (9,068) 9 17,034 (4,226) 226,429 (13,294) Corporate bonds 8 23,584 (4,416) 3 10,621 (1,379) 34,205 (5,795) Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 226 266,756 (25,377) 129 511,207 (109,547) 777,963 (134,924) 599 $ 670,035 $ (50,317) 226 $ 992,487 $ (208,440) $ 1,662,522 $ (258,757) December 31, 2021 U.S. treasuries 22 $ 144,172 $ (678) — $ — $ — $ 144,172 $ (678) Government agency securities 38 258,334 (4,622) 22 119,963 (5,326) 378,297 (9,948) Obligations of state and municipal subdivisions 14 47,200 (988) 2 3,555 (246) 50,755 (1,234) Corporate bonds 3 13,440 (60) — — — 13,440 (60) Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 115 621,717 (8,471) 11 44,620 (1,678) 666,337 (10,149) 192 $ 1,084,863 $ (14,819) 35 $ 168,138 $ (7,250) $ 1,253,001 $ (22,069) Securities Held to Maturity December 31, 2022 Obligations of state and municipal subdivisions 22 $ 98,475 $ (21,210) 21 $ 63,764 $ (23,610) $ 162,239 $ (44,820)

Loans, Net and Allowance for _2

Loans, Net and Allowance for Credit Losses on Loans (Tables)	12 Months Ended
	Dec. 31, 2022
Receivables [Abstract]
Compositions of Loans	Loans, net at December 31, 2022 and 2021, consisted of the following: December 31, 2022 2021 Commercial $ 2,240,959 $ 1,983,886 Mortgage warehouse purchase loans 312,099 788,848 Real estate: Commercial 7,817,447 6,617,455 Commercial construction, land and land development 1,231,071 1,180,181 Residential 1,592,859 1,300,122 Single-family interim construction 508,839 380,627 Agricultural 124,422 106,512 Consumer 81,667 81,815 Total loans (1) 13,909,363 12,439,446 Allowance for credit losses (148,787) (148,706) Total loans, net (1) $ 13,760,576 $ 12,290,740 ____________
Summary of Activity in Allowance for Loan Losses by Loan Class	The following is a summary of the activity in the allowance for credit losses on loans by class for the years ended December 31, 2022, 2021 and 2020: Commercial Commercial Real Estate Commercial Construction, Residential Single-Family Agricultural Consumer Unallocated Total Year ended December 31, 2022 Balance at beginning of year $ 49,747 $ 65,110 $ 23,861 $ 2,192 $ 7,222 $ 106 $ 468 $ — $ 148,706 Provision for credit losses 5,534 (23) (6,165) 1,183 4,595 101 43 — 5,268 Charge-offs (1,739) (4,159) — (6) — — (10) — (5,914) Recoveries 495 150 — 81 — — 1 — 727 Balance at end of year $ 54,037 $ 61,078 $ 17,696 $ 3,450 $ 11,817 $ 207 $ 502 $ — $ 148,787 Year ended December 31, 2021 Balance at beginning of year $ 27,311 $ 36,698 $ 13,425 $ 6,786 $ 2,156 $ 337 $ 684 $ 423 $ 87,820 Impact of adopting ASC 326 12,775 29,108 22,008 (2,255) 7,179 (178) (334) (423) 67,880 Initial allowance on loans purchased with credit deterioration 4,328 7,640 927 140 — — — — 13,035 Provision for credit losses 12,130 (7,961) (12,373) (2,486) (2,113) (53) 247 — (12,609) Charge-offs (6,856) (375) (126) — — — (174) — (7,531) Recoveries 59 — — 7 — — 45 — 111 Balance at end of year $ 49,747 $ 65,110 $ 23,861 $ 2,192 $ 7,222 $ 106 $ 468 $ — $ 148,706 Year ended December 31, 2020 Balance at beginning of year $ 12,844 $ 24,371 $ 8,714 $ 3,678 $ 1,606 $ 332 $ 231 $ (315) $ 51,461 Provision for credit losses 20,025 13,058 4,711 3,108 632 5 716 738 42,993 Charge-offs (5,670) (735) — — (82) — (386) — (6,873) Recoveries 112 4 — — — — 123 — 239 Balance at end of year $ 27,311 $ 36,698 $ 13,425 $ 6,786 $ 2,156 $ 337 $ 684 $ 423 $ 87,820
Individually Evaluated Loans	The following table presents loans that were evaluated for expected credit losses on an individual basis and the related specific credit loss allocations, by loan class as of December 31, 2022 and 2021: December 31, 2022 December 31, 2021 Loan Balance Specific Allocations Loan Balance Specific Allocations Commercial $ 21,981 $ 8,378 $ 38,911 $ 15,958 Commercial real estate 12,303 1,209 24,683 1,553 Commercial construction, land and land development — — 1,350 562 Residential real estate — — — — Single-family interim construction 189 43 — — Agricultural — — — — Consumer — — — — $ 34,473 $ 9,630 $ 64,944 $ 18,073
Summary of Nonperforming Loans by Loan Class	Nonperforming loans by loan class at December 31, 2022 and 2021, are summarized as follows: Commercial Commercial Commercial Construction, Residential Real Estate Single-Family Agricultural Consumer Total December 31, 2022 Nonaccrual loans (1) $ 22,565 $ 13,393 $ 15 $ 1,582 $ 189 $ — $ 8 $ 37,752 Loans past due 90 days and still accruing 5 — — 838 — — — 843 Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing) — 1,435 — 59 — — — 1,494 $ 22,570 $ 14,828 $ 15 $ 2,479 $ 189 $ — $ 8 $ 40,089 December 31, 2021 Nonaccrual loans (1) $ 36,802 $ 15,218 $ 23 $ 1,592 $ — $ — $ 38 $ 53,673 Loans past due 90 days and still accruing 187 — — 1,603 — — — 1,790 Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing) — 1,714 — 161 — — — 1,875 $ 36,989 $ 16,932 $ 23 $ 3,356 $ — $ — $ 38 $ 57,338 ____________ (1) There are $125 and $18 in loans on nonaccrual without an allowance for credit loss as of December 31, 2022 and 2021, respectively. Additionally, no interest income was recognized on nonaccrual loans. No significant amounts of accrued interest was reversed during the years ended December 31, 2022 and 2021.
Summary of Troubled Debt Restructurings	There were no loans modified under troubled debt restructurings during the year ended December 31, 2022. Following is a summary of loans modified under troubled debt restructurings during the year ended December 31, 2021: Commercial Commercial Commercial Construction, Residential Single-Family Agricultural Consumer Total Troubled debt restructurings during the year ended December 31, 2021 Number of contracts 2 — — — — — 1 3 Pre-restructuring outstanding recorded investment $ 1,789 $ — $ — $ — $ — $ — $ 6 $ 1,795 Post-restructuring outstanding recorded investment $ 570 $ — $ — $ — $ — $ — $ 6 $ 576
Aging of Past Due Loans by Loan Class	The following table presents information regarding the aging of past due loans by loan class as of December 31, 2022 and 2021: Loans Loans Total Past Current Total December 31, 2022 Commercial $ 1,005 $ 5,629 $ 6,634 $ 2,234,325 $ 2,240,959 Mortgage warehouse purchase loans — — — 312,099 312,099 Commercial real estate 13,093 449 13,542 7,803,905 7,817,447 Commercial construction, land and land development 2,820 — 2,820 1,228,251 1,231,071 Residential real estate 4,702 1,346 6,048 1,586,811 1,592,859 Single-family interim construction — 189 189 508,650 508,839 Agricultural — — — 124,422 124,422 Consumer 214 8 222 81,445 81,667 $ 21,834 $ 7,621 $ 29,455 $ 13,879,908 $ 13,909,363 December 31, 2021 Commercial $ 1,041 $ 11,056 $ 12,097 $ 1,971,789 $ 1,983,886 Mortgage warehouse purchase loans — — — 788,848 788,848 Commercial real estate 2,861 11,784 14,645 6,602,810 6,617,455 Commercial construction, land and land development — — — 1,180,181 1,180,181 Residential real estate 3,838 1,913 5,751 1,294,371 1,300,122 Single-family interim construction 1,290 — 1,290 379,337 380,627 Agricultural 16 — 16 106,496 106,512 Consumer 216 9 225 81,590 81,815 $ 9,262 $ 24,762 $ 34,024 $ 12,405,422 $ 12,439,446
Summary of Loans by Credit Quality Indicator by Class	The following summarizes the amortized cost basis of loans by year of origination/renewal and credit quality indicator by class of loan as of December 31, 2022 and December 31, 2021: Revolving Loans Converted to Term Loans Term Loans by Year of Origination or Renewal Revolving Loans December 31, 2022 2022 2021 2020 2019 2018 Prior Total Commercial Pass $ 297,800 $ 347,801 $ 126,390 $ 112,887 $ 51,623 $ 153,435 $ 1,031,483 $ 1,173 $ 2,122,592 Pass/Watch 8 14,790 155 188 1,812 7,934 8,216 5,907 39,010 Special Mention 234 4,821 101 1,485 — 144 8,646 20 15,451 Substandard 394 35,950 398 9,191 55 7,037 10,840 41 63,906 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial $ 298,436 $ 403,362 $ 127,044 $ 123,751 $ 53,490 $ 168,550 $ 1,059,185 $ 7,141 $ 2,240,959 Mortgage warehouse purchase loans Pass $ 312,099 $ — $ — $ — $ — $ — $ — $ — $ 312,099 Pass/Watch — — — — — — — — — Special Mention — — — — — — — — — Substandard — — — — — — — — — Doubtful — — — — — — — — — Loss — — — — — — — — — Total mortgage warehouse purchase loans $ 312,099 $ — $ — $ — $ — $ — $ — $ — $ 312,099 Commercial real estate Pass $ 2,652,298 $ 1,980,631 $ 998,910 $ 617,664 $ 448,758 $ 640,275 $ 59,184 $ 9,222 $ 7,406,942 Pass/Watch 90,313 25,954 33,664 18,678 53,469 25,831 — — 247,909 Special Mention 10,180 41,193 — 10,870 8,722 10,735 — 26 81,726 Substandard 3,513 40,001 8,574 3,178 8,268 17,336 — — 80,870 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial real estate $ 2,756,304 $ 2,087,779 $ 1,041,148 $ 650,390 $ 519,217 $ 694,177 $ 59,184 $ 9,248 $ 7,817,447 Commercial construction, land and land development Pass $ 553,376 $ 465,272 $ 126,704 $ 10,477 $ 23,073 $ 12,188 $ 12,705 $ 4,018 $ 1,207,813 Pass/Watch 8,036 43 10,297 — — 72 — — 18,448 Special Mention 1,313 674 — — — — — — 1,987 Substandard 28 2,771 — 10 — 14 — — 2,823 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial construction, land and land development $ 562,753 $ 468,760 $ 137,001 $ 10,487 $ 23,073 $ 12,274 $ 12,705 $ 4,018 $ 1,231,071 Revolving Loans Converted to Term Loans Term Loans by Year of Origination or Renewal Revolving Loans December 31, 2022 2022 2021 2020 2019 2018 Prior Total Residential real estate Pass $ 525,631 $ 379,789 $ 220,077 $ 155,460 $ 79,437 $ 154,875 $ 59,332 $ 1,238 $ 1,575,839 Pass/Watch 373 918 642 1,743 76 3,312 302 — 7,366 Special Mention 2,267 — — 700 227 1,224 126 — 4,544 Substandard 708 455 538 219 — 2,997 193 — 5,110 Doubtful — — — — — — — — — Loss — — — — — — — — — Total residential real estate $ 528,979 $ 381,162 $ 221,257 $ 158,122 $ 79,740 $ 162,408 $ 59,953 $ 1,238 $ 1,592,859 Single-family interim construction Pass $ 351,031 $ 105,573 $ 18,885 $ — $ 241 $ — $ 16,447 $ — $ 492,177 Pass/Watch — — — — — 16,471 2 — 16,473 Special Mention — — — — — — — — — Substandard — — — — — 189 — — 189 Doubtful — — — — — — — — — Loss — — — — — — — — — Total single-family interim construction $ 351,031 $ 105,573 $ 18,885 $ — $ 241 $ 16,660 $ 16,449 $ — $ 508,839 Agricultural Pass $ 52,525 $ 24,743 $ 13,875 $ 3,705 $ 5,847 $ 8,872 $ 10,588 $ — $ 120,155 Pass/Watch 2,700 — — — — — 1,547 — 4,247 Special Mention — — — — — — — — — Substandard — — — — — 20 — — 20 Doubtful — — — — — — — — — Loss — — — — — — — — — Total agricultural $ 55,225 $ 24,743 $ 13,875 $ 3,705 $ 5,847 $ 8,892 $ 12,135 $ — $ 124,422 Consumer Pass $ 7,715 $ 4,909 $ 7,959 $ 1,576 $ 300 $ 81 $ 59,113 $ — $ 81,653 Pass/Watch — — — — — — — — — Special Mention — — — — — — — — — Substandard — 4 — — — 10 — — 14 Doubtful — — — — — — — — — Loss — — — — — — — — — Total consumer $ 7,715 $ 4,913 $ 7,959 $ 1,576 $ 300 $ 91 $ 59,113 $ — $ 81,667 Total loans Pass $ 4,752,475 $ 3,308,718 $ 1,512,800 $ 901,769 $ 609,279 $ 969,726 $ 1,248,852 $ 15,651 $ 13,319,270 Pass/Watch 101,430 41,705 44,758 20,609 55,357 53,620 10,067 5,907 333,453 Special Mention 13,994 46,688 101 13,055 8,949 12,103 8,772 46 103,708 Substandard 4,643 79,181 9,510 12,598 8,323 27,603 11,033 41 152,932 Doubtful — — — — — — — — — Loss — — — — — — — — — Total loans $ 4,872,542 $ 3,476,292 $ 1,567,169 $ 948,031 $ 681,908 $ 1,063,052 $ 1,278,724 $ 21,645 $ 13,909,363 Revolving Loans Converted to Term Loans Term Loans by Year of Origination Revolving Loans December 31, 2021 2021 2020 2019 2018 2017 Prior Total Commercial Pass $ 422,810 $ 183,433 $ 98,059 $ 78,357 $ 81,620 $ 255,213 $ 690,242 $ 5,231 $ 1,814,965 Pass/Watch 260 3,010 1,019 3,135 11,688 65 18,768 3,319 41,264 Special Mention 1,411 117 8,517 7,244 195 4,571 12,885 — 34,940 Substandard 30,277 605 16,041 94 2,478 18,331 13,006 1,988 82,820 Doubtful — — — — — — 9,897 — 9,897 Total commercial $ 454,758 $ 187,165 $ 123,636 $ 88,830 $ 95,981 $ 278,180 $ 744,798 $ 10,538 $ 1,983,886 Mortgage warehouse purchase loans Pass $ 788,848 $ — $ — $ — $ — $ — $ — $ — $ 788,848 Pass/Watch — — — — — — — — — Special Mention — — — — — — — — — Substandard — — — — — — — — — Doubtful — — — — — — — — — Total mortgage warehouse purchase loans $ 788,848 $ — $ — $ — $ — $ — $ — $ — $ 788,848 Commercial real estate Pass $ 2,181,292 $ 1,198,508 $ 830,902 $ 645,470 $ 504,126 $ 626,292 $ 71,850 $ 4,320 $ 6,062,760 Pass/Watch 54,671 18,591 39,045 60,955 30,196 74,762 752 1,319 280,291 Special Mention 56,142 16,770 37,331 29,962 17,649 20,100 — — 177,954 Substandard 36,263 16,118 1,136 11,901 281 29,686 1,065 — 96,450 Doubtful — — — — — — — — — Total commercial real estate $ 2,328,368 $ 1,249,987 $ 908,414 $ 748,288 $ 552,252 $ 750,840 $ 73,667 $ 5,639 $ 6,617,455 Commercial construction, land and land development Pass $ 618,288 $ 262,136 $ 98,007 $ 85,596 $ 13,751 $ 14,939 $ 18,586 $ — $ 1,111,303 Pass/Watch 17,899 10,459 6,869 — — 84 — — 35,311 Special Mention 3,780 — — — 1,909 — — — 5,689 Substandard 11,601 — 387 14,489 28 1,373 — — 27,878 Doubtful — — — — — — — — — Total commercial construction, land and land development $ 651,568 $ 272,595 $ 105,263 $ 100,085 $ 15,688 $ 16,396 $ 18,586 $ — $ 1,180,181 Residential real estate Pass $ 408,402 $ 267,147 $ 190,890 $ 114,616 $ 88,295 $ 149,871 $ 60,212 $ 2,344 $ 1,281,777 Pass/Watch 1,019 487 1,270 405 2,331 4,179 169 — 9,860 Special Mention 657 — 568 129 250 1,043 126 — 2,773 Substandard 640 369 384 519 774 2,974 52 — 5,712 Doubtful — — — — — — — — — Total residential real estate $ 410,718 $ 268,003 $ 193,112 $ 115,669 $ 91,650 $ 158,067 $ 60,559 $ 2,344 $ 1,300,122 Revolving Loans Converted to Term Loans Term Loans by Year of Origination Revolving Loans December 31, 2021 2021 2020 2019 2018 2017 Prior Total Single-family interim construction Pass $ 305,267 $ 59,584 $ 2,801 $ 312 $ — $ — $ 12,663 $ — $ 380,627 Pass/Watch — — — — — — — — — Special Mention — — — — — — — — — Substandard — — — — — — — — — Doubtful — — — — — — — — — Total single-family interim construction $ 305,267 $ 59,584 $ 2,801 $ 312 $ — $ — $ 12,663 $ — $ 380,627 Agricultural Pass $ 36,442 $ 15,005 $ 4,454 $ 8,033 $ 12,229 $ 4,773 $ 18,993 $ — $ 99,929 Pass/Watch — 526 1,462 52 1,035 — 3,502 — 6,577 Special Mention — — — — — — — — — Substandard — — — — — 6 — — 6 Doubtful — — — — — — — — — Total agricultural $ 36,442 $ 15,531 $ 5,916 $ 8,085 $ 13,264 $ 4,779 $ 22,495 $ — $ 106,512 Consumer Pass $ 10,568 $ 9,496 $ 2,706 $ 710 $ 308 $ 181 $ 57,744 $ 43 $ 81,756 Pass/Watch — — — — 1 — — — 1 Special Mention — — — — — — — — — Substandard 30 2 — — 9 17 — — 58 Doubtful — — — — — — — — — Total consumer $ 10,598 $ 9,498 $ 2,706 $ 710 $ 318 $ 198 $ 57,744 $ 43 $ 81,815 Total loans Pass $ 4,771,917 $ 1,995,309 $ 1,227,819 $ 933,094 $ 700,329 $ 1,051,269 $ 930,290 $ 11,938 $ 11,621,965 Pass/Watch 73,849 33,073 49,665 64,547 45,251 79,090 23,191 4,638 373,304 Special Mention 61,990 16,887 46,416 37,335 20,003 25,714 13,011 — 221,356 Substandard 78,811 17,094 17,948 27,003 3,570 52,387 14,123 1,988 212,924 Doubtful — — — — — — 9,897 — 9,897 Total loans $ 4,986,567 $ 2,062,363 $ 1,341,848 $ 1,061,979 $ 769,153 $ 1,208,460 $ 990,512 $ 18,564 $ 12,439,446

Premises and Equipment, Net (Ta

Premises and Equipment, Net (Tables)	12 Months Ended
	Dec. 31, 2022
Property, Plant and Equipment [Abstract]
Components of Premises and Equipment, Net	Premises and equipment, net at December 31, 2022 and 2021 consisted of the following: December 31, 2022 2021 Land $ 81,570 $ 78,900 Building 274,218 193,475 Furniture, fixtures and equipment 59,979 47,576 Aircraft 8,947 8,947 Leasehold and tenant improvements 6,421 5,834 Construction in progress 3,667 45,263 434,802 379,995 Less accumulated depreciation (79,434) (71,972) $ 355,368 $ 308,023

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets, Net (Tables)	12 Months Ended
	Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of Other Intangible Assets Activity	The following is a summary of other intangible assets: December 31, 2022 2021 Gross core deposit intangible $ 125,884 $ 125,884 Less accumulated amortization (67,321) (55,323) Total core deposit intangible, net $ 58,563 $ 70,561 Gross customer relationship intangible $ 6,407 $ 6,407 Less accumulated amortization (1,971) (1,478) Total customer relationship intangible, net $ 4,436 $ 4,929 Total other intangible assets, net $ 62,999 $ 75,490
Future Amortization Expense Related to Other Intangible Assets	The future amortization expense related to other intangible assets remaining at December 31, 2022 is as follows: First year $ 12,439 Second year 11,752 Third year 11,238 Fourth year 10,801 Fifth year 8,284 Thereafter 8,485 $ 62,999

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2022
Deposits [Abstract]
Components of Deposits	Deposits at December 31, 2022 and 2021 consisted of the following: December 31, 2022 2021 Amount Percent Amount Percent Noninterest-bearing demand accounts $ 4,736,830 31.3 % $ 5,066,588 32.6 % Interest-bearing checking accounts 6,311,868 41.8 6,234,344 40.1 Savings accounts 760,777 5.0 758,727 4.9 Money market accounts 1,889,833 12.5 2,431,965 15.6 Certificates of deposit and individual retirement accounts (IRA), less than $250,000 752,594 5.0 540,011 3.5 Certificates of deposit and individual retirement accounts (IRA), $250,000 and greater 669,515 4.4 522,273 3.3 $ 15,121,417 100.0 % $ 15,553,908 100.0 %
Maturities of Certificates of Deposit	At December 31, 2022, the scheduled maturities of certificates of deposit, including IRAs, were as follows: First year $ 951,731 Second year 342,232 Third year 112,691 Fourth year 7,892 Fifth year 7,563 $ 1,422,109

Federal Home Loan Bank Advanc_2

Federal Home Loan Bank Advances (Tables)	12 Months Ended
	Dec. 31, 2022
Advance from Federal Home Loan Bank [Abstract]
Contractual Maturities of FHLB Advances	Contractual maturities of FHLB advances at December 31, 2022 were as follows: First year $ — Second year — Third year — Fourth year — Fifth year 100,000 Thereafter 200,000 $ 300,000

Other Borrowings (Tables)

Other Borrowings (Tables)	12 Months Ended
	Dec. 31, 2022
Debt Disclosure [Abstract]
Other borrowings	Other borrowings at December 31, 2022 and 2021 consisted of the following: December 31, 2022 2021 Unsecured fixed rate subordinated debentures in the amount of $110,000. The balance of borrowings at December 31, 2022 and 2021 is net of discount and origination costs of $555 and $913, respectively. Interest payments of 5.875% are made semiannually on February 1 and August 1. The maturity date is August 1, 2024. The notes may not be redeemed prior to maturity and meet the criteria to be recognized as Tier 2 capital for regulatory purposes. (1)(2) $ 109,445 $ 109,087 Unsecured fixed-to-floating subordinated debentures in the amount of $30,000. The balance of borrowings at December 31, 2022 and 2021 is net of origination costs of $388 and $465, respectively. Interest payments initially of 5.00% fixed rate are made semiannually on June 30 and December 31 through December 31, 2022. Thereafter, floating rate payments of 3 month LIBOR plus 2.83% are made quarterly in arrears beginning on March 31, 2023. The maturity date is December 31, 2027 with next optional redemption on March 31, 2023 and quarterly thereafter. The notes meet the criteria to be recognized as Tier 2 capital for regulatory purposes. (2) 29,612 29,535 Unsecured fixed-to-floating subordinated debentures in the amount of $130,000. The balance of borrowings at December 31, 2022 and 2021 is net of origination costs of $1,991 and $2,251, respectively. Interest payments initially of 4.00% fixed rate are made semiannually on March 15 and September 15 through September 15, 2025. Thereafter, floating rate payments equal to a benchmark rate (which is expected to be 3 month Secured Overnight Financing Rate (SOFR)) plus 3.885% payable quarterly in arrears beginning on December 15, 2025. The maturity date is September 15, 2030 with an optional redemption at September 15, 2025. The notes meet the criteria to be recognized as Tier 2 capital for regulatory purposes. (2) 128,009 127,749 Unsecured revolving line of credit with an unrelated commercial bank in the amount of $100,000. The line bears interest at the monthly Bloomberg Short-Term Bank Yield Index (BSBY) plus 1.75% and matured February 16, 2023. The Company is required to meet certain financial covenants on a quarterly basis, which includes certain restrictions on cash at IBG and meeting minimum capital ratios. (3) — 17,000 $ 267,066 $ 283,371 ____________ (1) At December 31, 2022 and 2021, other borrowings included amounts owed to related parties of $50. (2) The permissible portion of qualified subordinated notes decreases 20% per year during the final five years of the term of the notes. (3) Subsequent to December 31, 2022, the Company renewed the line (see Note 22. Subsequent Events ).

Junior Subordinated Debentures

Junior Subordinated Debentures (Tables)	12 Months Ended
	Dec. 31, 2022
Debt Disclosure [Abstract]
Schedule of Subordinated Borrowing	Information regarding the Debentures as of December 31, 2022 are summarized in the table below: Trust Preferred Securities Issued Debentures Carrying Value Repricing Frequency Interest Rate Interest Rate Index Maturity Date IB Trust I $ 5,155 $ 5,155 Quarterly 7.69% LIBOR + 3.25% March 2033 Guaranty Trust III 10,310 10,310 Quarterly 7.18 LIBOR + 3.10 July 2033 IB Trust II 3,093 3,093 Quarterly 6.93 LIBOR + 2.85 March 2034 Cenbank Trust III 15,464 15,464 Quarterly 6.73 LIBOR + 2.65 April 2034 IB Trust III 3,712 3,712 Quarterly 7.09 LIBOR +2.40 December 2035 IB Centex Trust I 2,578 2,578 Quarterly 7.94 LIBOR + 3.25 February 2035 Community Group Statutory Trust I 3,609 3,609 Quarterly 6.37 LIBOR + 1.60 June 2037 Northstar Trust II (1) 5,155 4,045 Quarterly 6.44 LIBOR + 1.67 June 2037 Northstar Trust III (1) 8,248 6,453 Quarterly 6.44 LIBOR + 1.67 September 2037 $ 57,324 $ 54,419 ____________

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2022
Leases [Abstract]
Schedule of Net Lease Cost and Other Information Related to Operating Leases	The table below summarizes net lease cost: Years Ended December 31, 2022 2021 2020 Operating lease cost $ 6,559 $ 6,567 $ 6,937 Short term lease cost 121 64 124 Variable lease cost 1,455 1,645 1,631 Sublease income (268) (282) (221) Net lease cost $ 7,867 $ 7,994 $ 8,471 The table below summarizes other information related to operating leases: Years Ended December 31, 2022 2021 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 5,743 $ 5,740 Weighted average remaining lease term - operating leases, in years 7.19 7.41 Weighted average discount rate - operating leases 2.97 % 3.01 %
Summary of Lease Payment Obligations	The following table outlines lease payment obligations as outlined in the Company’s lease agreements for each of the next five years and thereafter in addition to a reconcilement to the Company’s current lease liability as of December 31, 2022. 2023 $ 5,397 2024 5,123 2025 4,329 2026 2,895 2027 2,090 Thereafter 9,000 Total lease payments 28,834 Less imputed interest (2,921) $ 25,913

Off-Balance Sheet Arrangement_2

Off-Balance Sheet Arrangements, Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	At December 31, 2022 and 2021, the approximate amounts of these financial instruments were as follows: December 31, 2022 2021 Commitments to extend credit $ 3,291,409 $ 2,770,036 Standby letters of credit 24,135 30,007 $ 3,315,544 $ 2,800,043
Commitments Off Balance Sheet Allowance for Credit Losses	The allowance for credit losses on off-balance sheet commitments was as follows: December 31, 2022 2021 2020 Balance at beginning of period $ 4,722 $ — $ — Impact of ASC 326 adoption — 1,113 — Provision for off-balance sheet credit exposure (778) 3,609 — Balance at end of period $ 3,944 $ 4,722 $ —

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Schedule of Income Tax Expense	Income tax expense for the years ended December 31, 2022, 2021 and 2020 was as follows: Years Ended December 31, 2022 2021 2020 Current income tax expense $ 44,836 $ 52,130 $ 52,806 Deferred income tax expense (benefit) 5,168 5,353 (1,633) Income tax expense, as reported $ 50,004 $ 57,483 $ 51,173
Schedule of Effective Income Tax Rate Reconciliation	A reconciliation between reported income tax expense and the amounts computed by applying the U.S. federal statutory income tax rate of 21% for the years ended December 31, 2022, 2021 and 2020 to income before income taxes is presented below: Years Ended December 31, 2022 2021 2020 Income tax expense computed at the statutory rate $ 51,722 $ 59,269 $ 53,000 Tax-exempt interest income from municipal securities (2,176) (1,752) (1,779) Tax-exempt loan income (1,116) (1,359) (1,245) Bank owned life insurance income (1,296) (1,094) (1,123) State taxes, net of federal benefit 2,045 2,516 2,660 Non-deductible compensation 919 473 — Net tax (benefit) expense from stock based compensation (703) (691) 243 Other 609 121 (583) $ 50,004 $ 57,483 $ 51,173
Schedule of Deferred Tax Assets and Liabilities	Components of deferred tax assets and liabilities are presented in the table below. Deferred taxes as of December 31, 2022 and 2021 are based on the U.S. statutory federal income tax rate of 21%. December 31, 2022 2021 Deferred tax assets: Allowance for loan losses $ 33,241 $ 33,463 Net unrealized loss on available for sale securities 54,315 — Lease liabilities under operating leases 5,640 5,141 NOL and tax credit carryforwards from acquisitions 2,986 3,354 Net unrealized loss on cash flow hedge 2,351 221 Acquired loan fair market value adjustments 3,785 5,750 Stock-based compensation 2,496 1,822 Reserve for bonuses and other accrued expenses 4,163 3,775 Deferred loan fees and costs, net 3,738 2,800 Acquired securities 1,107 1,611 Acquired intangibles 1,060 1,213 Unearned income 420 503 Deferred compensation 416 628 Noncompete agreements 484 540 Nonaccrual loans 268 463 Other 868 663 117,338 61,947 Deferred tax liabilities: Premises and equipment (16,920) (10,376) Right-of-use assets under operating leases (5,404) (4,934) Net unrealized gain on available for sale securities — (1,457) Intangible assets (13,711) (16,464) Acquired junior subordinated debentures fair value adjustment (632) (677) FHLB and other restricted stocks (359) (335) Acquired tax goodwill (899) (735) Other (744) (791) (38,669) (35,769) Net deferred tax asset $ 78,669 $ 26,178

Related Party Transactions (Tab

Related Party Transactions (Tables)	12 Months Ended
	Dec. 31, 2022
Related Party Transactions [Abstract]
Loan Activity for Officers, Directors and Affiliates	Loan activity for officers, directors and their affiliates for the year ended December 31, 2022 is as follows: Balance at beginning of year $ 34,627 New loan originations 13,641 Repayments (13,545) Changes in affiliated persons 1,075 Balance at end of year $ 35,798

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2022
Fair Value Disclosures [Abstract]
Assets and Liabilities at Fair Value on Recurring Basis	The following table represents assets and liabilities reported on the consolidated balance sheets at their fair value on a recurring basis as of December 31, 2022 and 2021 by level within the ASC Topic 820 fair value measurement hierarchy: Fair Value Measurements at Reporting Date Using Assets/ Quoted Prices Significant Significant December 31, 2022 Assets: Investment securities available for sale: U.S. treasuries $ 239,410 $ — $ 239,410 $ — Government agency securities 384,515 — 384,515 — Obligations of state and municipal subdivisions 251,231 — 251,231 — Corporate bonds 37,205 — 37,205 — Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 778,473 — 778,473 — Other securities 950 — 950 — Loans held for sale, fair value option elected (1) 10,612 — 10,612 — Derivative financial instruments: Interest rate lock commitments 294 — 294 — Forward mortgage-backed securities trades 98 — 98 — Financial institution counterparty 13,968 — 13,968 — Liabilities: Derivative financial instruments: Interest rate swaps - cash flow hedge 11,283 — 11,283 — Interest rate lock commitments 6 — 6 — Forward mortgage-backed securities trades 11 — 11 — Loan customer counterparty 13,788 — 13,788 — December 31, 2021 Assets: Investment securities available for sale: U.S. treasuries $ 174,996 $ — $ 174,996 $ — Government agency securities 444,675 — 444,675 — Obligations of state and municipal subdivisions 432,760 — 432,760 — Corporate bonds 34,796 — 34,796 — Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA 918,550 — 918,550 — Other securities 950 — 950 — Loans held for sale, fair value option elected (1) 28,249 — 28,249 — Derivative financial instruments: Interest rate lock commitments 1,029 — 1,029 — Forward mortgage-backed securities trades 27 — 27 — Loan customer counterparty 6,459 — 6,459 — Financial institution counterparty 1,078 — 1,078 — Liabilities: Derivative financial instruments: Interest rate swaps - cash flow hedge 1,158 — 1,158 — Interest rate lock commitments 4 — 4 — Forward mortgage-backed securities trades 21 — 21 — Loan customer counterparty 1,073 — 1,073 — Financial institution counterparty 6,772 — 6,772 — ____________ (1) At December 31, 2022 and 2021, loans held for sale for which the fair value option was elected had an aggregate outstanding principal balance of $10,330 and $27,176, respectively. There were no mortgage loans held for sale under the fair value option that were 90 days or greater past due or on nonaccrual at December 31, 2022.
Assets and Liabilities at Fair Value on Nonrecurring Basis	The following table presents the assets carried on the consolidated balance sheet by caption and by level in the fair value hierarchy at December 31, 2022 and 2021, for which a nonrecurring change in fair value has been recorded: Fair Value Measurements at Reporting Date Using Assets Quoted Prices Significant Significant Period Ended December 31, 2022 Assets: Individually evaluated loans $ 8,527 $ — $ — $ 8,527 $ 3,505 Other real estate owned 23,900 — — 23,900 3,548 December 31, 2021 Assets: Individually evaluated loans $ 11,204 $ — $ — $ 11,204 $ 3,526
Carrying Amount and Estimated Fair Value of Financial Instruments	The carrying amount, estimated fair value and the level of the fair value hierarchy of the Company’s financial instruments that are reported at amortized cost on the Company's consolidated balance sheets were as follows at December 31, 2022 and 2021: Fair Value Measurements at Reporting Date Using Carrying Estimated Quoted Prices Significant Significant December 31, 2022 Financial assets: Cash and cash equivalents $ 654,322 $ 654,322 $ 654,322 $ — $ — Certificates of deposit held in other banks 496 486 — 486 — Investment securities held to maturity 207,059 162,239 — 162,239 — Loans held for sale, at cost 698 710 — 710 — Loans, net 13,760,576 13,450,582 — — 13,450,582 FHLB of Dallas stock and other restricted stock 23,436 23,436 — 23,436 — Accrued interest receivable 59,214 59,214 — 59,214 — Financial liabilities: Deposits 15,121,417 15,063,025 — 15,063,025 — Accrued interest payable 9,604 9,604 — 9,604 — FHLB advances 300,000 246,519 — 246,519 — Other borrowings 267,066 258,800 — 258,800 — Junior subordinated debentures 54,419 53,969 — 53,969 — Off-balance sheet assets (liabilities): Commitments to extend credit — — — — — Standby letters of credit — — — — — December 31, 2021 Financial assets: Cash and cash equivalents $ 2,608,444 $ 2,608,444 $ 2,608,444 $ — $ — Certificates of deposit held in other banks 3,245 3,246 — 3,246 — Loans held for sale, at cost 3,875 3,982 — 3,982 — Loans, net 12,290,740 12,415,366 — — 12,415,366 FHLB of Dallas stock and other restricted stock 21,573 21,573 — 21,573 — Accrued interest receivable 49,636 49,636 — 49,636 — Financial liabilities: Deposits 15,553,908 15,553,645 — 15,553,645 — Accrued interest payable 5,301 5,301 — 5,301 — FHLB advances 150,000 128,555 — 128,555 — Other borrowings 283,371 303,250 — 303,250 — Junior subordinated debentures 54,221 45,501 — 45,501 — Off-balance sheet assets (liabilities): Commitments to extend credit — — — — — Standby letters of credit — — — — —

Derivative Financial Instrume_2

Derivative Financial Instruments - (Tables)	12 Months Ended
	Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Notional Balances and Fair Values of Outstanding Positions	The following table provides the outstanding notional balances and fair values of outstanding derivative positions at December 31, 2022 and 2021: Outstanding Notional Balance Asset Derivative Liability Derivative December 31, 2022 Derivatives designated as hedging instruments: Interest rate swaps - cash flow hedge $ 100,000 $ — $ 11,283 Derivatives not designated as hedging instruments: Interest rate lock commitments 15,476 294 6 Forward mortgage-backed securities trades 18,500 98 11 Commercial loan interest rate swaps: Loan customer counterparty 183,183 — 13,788 Financial institution counterparty 183,183 13,968 — December 31, 2021 Derivatives designated as hedging instruments: Interest rate swaps - cash flow hedge $ 100,000 $ — $ 1,158 Derivatives not designated as hedging instruments: Interest rate lock commitments 34,064 1,029 4 Forward mortgage-backed securities trades 30,500 27 21 Commercial loan interest rate swaps: Loan customer counterparty 254,935 6,459 1,073 Financial institution counterparty 254,935 1,078 6,772
Schedule of Weighted Average Interest Rate Received and Paid	The commercial loan customer counterparty weighted average received and paid interest rates for interest rate swaps outstanding were as follows: Weighted Average Interest Rate December 31, 2022 December 31, 2021 Received Paid Received Paid Loan customer counterparty 4.12 % 6.72 % 4.12 % 2.40 %
Income (Loss) on Derivatives Not Designated as Hedging Instruments	A summary of derivative activity and the related impact on the consolidated statements of income for the years ended December 31, 2022, 2021 and 2020 is as follows: Income Statement Location Years Ended December 31, 2022 2021 2020 Derivatives designated as hedging instruments Interest rate swaps - cash flow hedges Interest and fees on loans $ (791) $ 584 $ — Derivatives not designated as hedging instruments Interest rate lock commitments Mortgage banking revenue (737) (2,490) 2,668 Forward mortgage-backed securities trades Mortgage banking revenue 81 574 (505)

Stock Awards (Tables)

Stock Awards (Tables)	12 Months Ended
	Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]
Nonvested Shares Activity	The following table summarizes the activity in nonvested restricted stock awards for the years ended December 31, 2022 and 2021: Restricted Stock Awards Number of Weighted Average Nonvested shares, December 31, 2021 363,551 $ 53.14 Granted during the period 149,160 69.80 Vested during the period (193,303) 54.61 Forfeited during the period (10,393) 57.40 Nonvested shares, December 31, 2022 309,015 $ 60.12 Nonvested shares, December 31, 2020 468,800 $ 49.01 Granted during the period 115,463 66.10 Vested during the period (185,447) 51.18 Forfeited during the period (35,265) 50.23 Nonvested shares, December 31, 2021 363,551 $ 53.14
Future Vesting Schedule of Nonvested Shares Activity	At December 31, 2022, the future vesting schedule of the nonvested restricted stock awards is as follows: Number of Shares First year 156,588 Second year 97,066 Third year 42,154 Fourth year 13,207 Total nonvested shares 309,015
Nonvested performance stock units	The following table summarizes the activity in nonvested performance stock units at target award level for the years ended December 31, 2022 and 2021: Performance-Based Restricted Stock Units Number of Weighted Average Nonvested shares, December 31, 2021 114,498 $ 43.93 Granted during the period 25,742 72.65 Nonvested shares, December 31, 2022 140,240 $ 49.20 Nonvested shares, December 31, 2020 89,300 $ 38.29 Granted during the period 25,198 63.92 Nonvested shares, December 31, 2021 114,498 $ 43.93

Regulatory Matters (Tables)

Regulatory Matters (Tables)	12 Months Ended
	Dec. 31, 2022
Regulated Operations [Abstract]
Schedule of Compliance with Regulatory Capital Requirements	The following table presents actual and required capital ratios under Basel III Capital Rules for the Company and Bank as of December 31, 2022 and 2021. Capital levels required to be considered well capitalized are based upon prompt corrective action regulations, as amended, to reflect the changes under the Basel III Capital Rules. Actual Minimum Capital Required To Be Considered Well Capitalized (1) Amount Ratio Amount Ratio Amount Ratio December 31, 2022 Total capital to risk weighted assets: Consolidated $ 1,936,363 12.35 % $ 1,645,772 10.50 % $ 1,567,402 10.00 % Bank 2,013,874 12.85 1,645,236 10.50 1,566,891 10.00 Tier 1 capital to risk weighted assets: Consolidated 1,637,191 10.45 1,332,291 8.50 940,441 6.00 Bank 1,896,702 12.10 1,331,858 8.50 1,253,513 8.00 Common equity tier 1 to risk weighted assets: Consolidated 1,581,591 10.09 1,097,181 7.00 N/A N/A Bank 1,896,702 12.10 1,096,824 7.00 1,018,479 6.50 Tier 1 capital to average assets: Consolidated 1,637,191 9.49 690,309 4.00 N/A N/A Bank 1,896,702 10.99 690,130 4.00 862,663 5.00 December 31, 2021 Total capital to risk weighted assets: Consolidated $ 1,916,163 13.67 % $ 1,471,510 10.50 % $ 1,401,438 10.00 % Bank 1,983,530 14.16 1,471,036 10.50 1,400,987 10.00 Tier 1 capital to risk weighted assets: Consolidated 1,614,372 11.52 1,191,223 8.50 840,863 6.00 Bank 1,885,739 13.46 1,190,839 8.50 1,120,790 8.00 Common equity tier 1 to risk weighted assets: Consolidated 1,558,772 11.12 981,007 7.00 N/A N/A Bank 1,885,739 13.46 980,691 7.00 910,642 6.50 Tier 1 capital to average assets: Consolidated 1,614,372 8.80 733,954 4.00 N/A N/A Bank 1,885,739 10.28 733,785 4.00 917,231 5.00 _____________ (1) “Well-capitalized” Common Equity Tier 1 to Risk-Weighted Assets and Tier 1 to Average Assets are not formally defined under applicable banking regulations for bank holding companies. However, the Federal Reserve Board and the FDIC may require the Company to maintain a Tier 1 to Average Assets Ratio above the required minimum.

Parent Company Only Financial_2

Parent Company Only Financial Statements (Tables)	12 Months Ended
	Dec. 31, 2022
Condensed Financial Information Disclosure [Abstract]
Balance Sheet for the Parent Company	The following balance sheets, statements of income and statements of cash flows for Independent Bank Group, Inc. should be read in conjunction with the consolidated financial statements and the notes thereto. Balance Sheets December 31, Assets 2022 2021 Cash and cash equivalents $ 5,660 $ 10,747 Investment in subsidiaries 2,701,273 2,904,395 Investment in trusts 1,724 1,724 Other assets 3,511 3,039 Total assets $ 2,712,168 $ 2,919,905 Liabilities and Stockholders' Equity Other borrowings $ 267,066 $ 283,371 Junior subordinated debentures 54,419 54,221 Other liabilities 5,300 5,663 Total liabilities 326,785 343,255 Stockholders' equity: Preferred stock — — Common stock 412 428 Additional paid-in capital 1,959,193 1,945,497 Retained earnings 638,354 625,484 Accumulated other comprehensive (loss) income (212,576) 5,241 Total stockholders' equity 2,385,383 2,576,650 Total liabilities and stockholders' equity $ 2,712,168 $ 2,919,905
Statement of Income for the Parent Company	Statements of Income Years Ended December 31, 2022 2021 2020 Interest expense: Interest on other borrowings $ 14,450 $ 15,247 $ 12,446 Interest on junior subordinated debentures 2,713 1,756 2,162 Total interest expense 17,163 17,003 14,608 Noninterest income: Dividends from subsidiaries 208,665 134,547 83,314 Other — 61 — Total noninterest income 208,665 134,608 83,314 Noninterest expense: Salaries and employee benefits 14,886 10,546 8,346 Professional fees 736 126 202 Acquisition expense, including legal — — 16,225 Other 2,738 2,510 2,424 Total noninterest expense 18,360 13,182 27,197 Income before income tax benefit and equity in undistributed income of subsidiaries 173,142 104,423 41,509 Income tax benefit 8,454 7,131 9,410 Income before equity in undistributed income of subsidiaries 181,596 111,554 50,919 Equity in undistributed income of subsidiaries 14,695 113,196 150,290 Net income $ 196,291 $ 224,750 $ 201,209
Statement of Cash Flows for the Parent Company	Statements of Cash Flows Years Ended December 31, 2022 2021 2020 Cash flows from operating activities: Net income $ 196,291 $ 224,750 $ 201,209 Adjustments to reconcile net income to net cash provided by operating activities: Equity in undistributed net income of subsidiaries (14,695) (113,196) (150,290) Amortization of discount and origination costs on borrowings 893 894 720 Stock based compensation expense 13,697 10,691 8,450 Excess tax (benefit) expense on restricted stock vested (703) (691) 243 Deferred tax (benefit) expense (579) (210) 96 Net change in other assets 107 1,020 (590) Net change in other liabilities 140 500 (952) Net cash provided by operating activities 195,151 123,758 58,886 Cash flows from investing activities: Capital investment in subsidiaries — — (120,000) Net cash used in investing activities — — (120,000) Cash flows from financing activities: Proceeds from other borrowings 111,000 75,000 148,653 Repayments of other borrowings (128,000) (104,500) (39,250) Repurchase of common stock (119,746) (32,132) (5,819) Dividends paid (63,492) (56,861) (45,265) Net cash (used in) provided by financing activities (200,238) (118,493) 58,319 Net change in cash and cash equivalents (5,087) 5,265 (2,795) Cash and cash equivalents at beginning of year 10,747 5,482 8,277 Cash and cash equivalents at end of year $ 5,660 $ 10,747 $ 5,482

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Additional Information (Details)	12 Months Ended
	Dec. 31, 2022 business_trust segment
Summary Of Significant Accounting Policies [Line Items]
Number of wholly owned statutory business trusts | business_trust	9
Number of reportable segments | segment	1
Core deposit intangibles
Summary Of Significant Accounting Policies [Line Items]
Finite-lived intangible assets, useful life	10 years
Customer relationship intangibles
Summary Of Significant Accounting Policies [Line Items]
Finite-lived intangible assets, useful life	13 years
Minimum
Summary Of Significant Accounting Policies [Line Items]
Premises and equipment, useful life	3 years
Minimum | Computer Software, Intangible Asset
Summary Of Significant Accounting Policies [Line Items]
Finite-lived intangible assets, useful life	1 year
Maximum
Summary Of Significant Accounting Policies [Line Items]
Premises and equipment, useful life	30 years
Maximum | Computer Software, Intangible Asset
Summary Of Significant Accounting Policies [Line Items]
Finite-lived intangible assets, useful life	5 years

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - EPS (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Basic earnings per share:
Net income	$ 196,291	$ 224,750	$ 201,209
Undistributed earnings allocated to participating securities	1,037	1,576	1,311
Dividends paid on participating securities	494	534	380
Net income available to common shareholders	$ 194,760	$ 222,640	$ 199,518
Weighted-average basic shares outstanding (shares)	41,385,516	42,666,007	42,754,606
Basic earnings per share (usd per share)	$ 4.71	$ 5.22	$ 4.67
Diluted earnings per share:
Total weighted-average diluted shares outstanding (shares)	41,468,775	42,724,792	42,754,606
Diluted earnings per share (usd per share)	$ 4.70	$ 5.21	$ 4.67
Anti-dilutive participating securities (shares)	124,503	181,016	58,359
Performance stock units
Diluted earnings per share:
Add dilutive (shares)	83,259	58,785	0

Recent Accounting Pronounceme_2

Recent Accounting Pronouncements (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Jan. 01, 2021	Dec. 31, 2020	Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect reduction to retained earnings	$ (2,385,383)	$ (2,576,650)		$ (2,515,371)	$ (2,339,773)
Deferred tax asset	33,241	33,463	$ 15,113
Financing Receivable, Allowance for Credit Loss			87,820
Receivables Acquired with Deteriorated Credit Quality | Accounting Standards Update 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing Receivable, Allowance for Credit Loss			13,035
Impact of ASC 326 adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect reduction to retained earnings				53,880
Financing Receivable, Allowance for Credit Loss			67,880
Impact of ASC 326 adoption | Receivables Acquired with Deteriorated Credit Quality
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing Receivable, Allowance for Credit Loss			13,035
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect reduction to retained earnings	$ (638,354)	$ (625,484)		(543,800)	$ (393,674)
Retained Earnings | Impact of ASC 326 adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect reduction to retained earnings			$ 53,880	$ 53,880

Recent Accounting Pronounceme_3

Recent Accounting Pronouncements - CECL (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Jan. 01, 2021	Dec. 31, 2020	Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing Receivable, Allowance for Credit Loss			$ 87,820
Allowance for credit losses on off-balance-sheet credit exposures	$ 3,944	$ 4,722	0	$ 0	$ 0
Commercial
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing Receivable, Allowance for Credit Loss			27,311
Real estate | Commercial real estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing Receivable, Allowance for Credit Loss			36,698
Real estate | Commercial construction, land and land development
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing Receivable, Allowance for Credit Loss			13,425
Real estate | Residential Real Estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing Receivable, Allowance for Credit Loss			6,786
Real estate | Single-family interim construction
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing Receivable, Allowance for Credit Loss			2,156
Agricultural
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing Receivable, Allowance for Credit Loss			337
Consumer
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing Receivable, Allowance for Credit Loss			684
Unallocated
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing Receivable, Allowance for Credit Loss			423
Impact of ASC 326 adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing Receivable, Allowance for Credit Loss			67,880
Allowance for credit losses on off-balance-sheet credit exposures		$ 0	1,113	$ 1,113	$ 0
Impact of ASC 326 adoption | Commercial
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing Receivable, Allowance for Credit Loss			12,775
Impact of ASC 326 adoption | Real estate | Commercial real estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing Receivable, Allowance for Credit Loss			29,108
Impact of ASC 326 adoption | Real estate | Commercial construction, land and land development
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing Receivable, Allowance for Credit Loss			22,008
Impact of ASC 326 adoption | Real estate | Residential Real Estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing Receivable, Allowance for Credit Loss			(2,255)
Impact of ASC 326 adoption | Real estate | Single-family interim construction
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing Receivable, Allowance for Credit Loss			7,179
Impact of ASC 326 adoption | Agricultural
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing Receivable, Allowance for Credit Loss			(178)
Impact of ASC 326 adoption | Consumer
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing Receivable, Allowance for Credit Loss			(334)
Impact of ASC 326 adoption | Unallocated
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing Receivable, Allowance for Credit Loss			(423)
Impact of ASC 326 adoption | Receivables Acquired with Deteriorated Credit Quality
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing Receivable, Allowance for Credit Loss			13,035
Allowance for credit losses on off-balance-sheet credit exposures			0
Impact of ASC 326 adoption | Receivables Acquired with Deteriorated Credit Quality | Commercial
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing Receivable, Allowance for Credit Loss			4,328
Impact of ASC 326 adoption | Receivables Acquired with Deteriorated Credit Quality | Real estate | Commercial real estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing Receivable, Allowance for Credit Loss			7,640
Impact of ASC 326 adoption | Receivables Acquired with Deteriorated Credit Quality | Real estate | Commercial construction, land and land development
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing Receivable, Allowance for Credit Loss			927
Impact of ASC 326 adoption | Receivables Acquired with Deteriorated Credit Quality | Real estate | Residential Real Estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing Receivable, Allowance for Credit Loss			140
Impact of ASC 326 adoption | Receivables Acquired with Deteriorated Credit Quality | Real estate | Single-family interim construction
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing Receivable, Allowance for Credit Loss			0
Impact of ASC 326 adoption | Receivables Acquired with Deteriorated Credit Quality | Agricultural
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing Receivable, Allowance for Credit Loss			0
Impact of ASC 326 adoption | Receivables Acquired with Deteriorated Credit Quality | Consumer
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing Receivable, Allowance for Credit Loss			0
Impact of ASC 326 adoption | Receivables Acquired with Deteriorated Credit Quality | Unallocated
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing Receivable, Allowance for Credit Loss			0
Cumulative effect, period of adoption, adjusted balance
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing Receivable, Allowance for Credit Loss			168,735
Allowance for credit losses on off-balance-sheet credit exposures			1,113
Cumulative effect, period of adoption, adjusted balance | Commercial
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing Receivable, Allowance for Credit Loss			44,414
Cumulative effect, period of adoption, adjusted balance | Real estate | Commercial real estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing Receivable, Allowance for Credit Loss			73,446
Cumulative effect, period of adoption, adjusted balance | Real estate | Commercial construction, land and land development
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing Receivable, Allowance for Credit Loss			36,360
Cumulative effect, period of adoption, adjusted balance | Real estate | Residential Real Estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing Receivable, Allowance for Credit Loss			4,671
Cumulative effect, period of adoption, adjusted balance | Real estate | Single-family interim construction
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing Receivable, Allowance for Credit Loss			9,335
Cumulative effect, period of adoption, adjusted balance | Agricultural
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing Receivable, Allowance for Credit Loss			159
Cumulative effect, period of adoption, adjusted balance | Consumer
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing Receivable, Allowance for Credit Loss			350
Cumulative effect, period of adoption, adjusted balance | Unallocated
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing Receivable, Allowance for Credit Loss			$ 0

Statement of Cash Flows - Other

Statement of Cash Flows - Other Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash transactions:
Interest expense paid	$ 92,506	$ 65,336	$ 97,246
Income taxes paid	46,570	58,083	54,842
Noncash transactions:
Deferred dividend equivalents	200	197	0
Transfer of loans to other real estate owned	23,900	0	5,239
Loans to facilitate the sale of other real estate owned	0	0	2,039
Transfer of securities available for sale to held to maturity	117,583	0	0
Right-of-use assets obtained in exchange for lease liabilities	4,011	5,156	105
Loans purchased, not yet settled	$ 27,210	$ 29,332	$ 9,442

Securities - Amortized Cost of

Securities - Amortized Cost of Securities and Approximate Fair Value (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Gain (Loss) on Securities [Line Items]
Amortized Cost, AFS	$ 1,950,426	$ 1,999,792
Gross Unrealized Gain, AFS	115	29,004
Gross Unrealized Loss, AFS	(258,757)	(22,069)
Fair Value, AFS	1,691,784	2,006,727
Amortized Cost, HTM	207,059	0
Investment securities held to maturity	162,239
Accrued Interest, AFS	7,702	8,581
Accrued Interest, HTM	2,697
U.S. treasuries
Gain (Loss) on Securities [Line Items]
Amortized Cost, AFS	259,675	174,950
Gross Unrealized Gain, AFS	0	724
Gross Unrealized Loss, AFS	(20,265)	(678)
Fair Value, AFS	239,410	174,996
Government agency securities
Gain (Loss) on Securities [Line Items]
Amortized Cost, AFS	468,994	453,402
Gross Unrealized Gain, AFS	0	1,221
Gross Unrealized Loss, AFS	(84,479)	(9,948)
Fair Value, AFS	384,515	444,675
Obligations of state and municipal subdivisions
Gain (Loss) on Securities [Line Items]
Amortized Cost, AFS	264,419	418,554
Gross Unrealized Gain, AFS	106	15,440
Gross Unrealized Loss, AFS	(13,294)	(1,234)
Fair Value, AFS	251,231	432,760
Amortized Cost, HTM	207,059
Gross Unrealized Gain, HTM	0
Gross Unrealized Loss, HTM	(44,820)
Investment securities held to maturity	162,239
Corporate bonds
Gain (Loss) on Securities [Line Items]
Amortized Cost, AFS	43,000	33,994
Gross Unrealized Gain, AFS	0	862
Gross Unrealized Loss, AFS	(5,795)	(60)
Fair Value, AFS	37,205	34,796
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA
Gain (Loss) on Securities [Line Items]
Amortized Cost, AFS	913,388	917,942
Gross Unrealized Gain, AFS	9	10,757
Gross Unrealized Loss, AFS	(134,924)	(10,149)
Fair Value, AFS	778,473	918,550
Other securities
Gain (Loss) on Securities [Line Items]
Amortized Cost, AFS	950	950
Gross Unrealized Gain, AFS	0	0
Gross Unrealized Loss, AFS	0	0
Fair Value, AFS	$ 950	$ 950

Securities - Additional Informa

Securities - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Securities Transferred from AFS to HTM	$ 117,583
Transfers unrealized pre-tax gains	26
Securities held to maturity	207,059	$ 0
Carrying value of securities pledged	1,168,006	997,416
Allowance for credit loss, AFS securities	0
Allowance for credit loss, HTM securities	$ 0	$ 0

Securities - Amortized Cost and

Securities - Amortized Cost and Estimated Fair Value of Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Amortized Cost, AFS
Due in one year or less	$ 51,502
Due from one year to five years	317,356
Due from five to ten years	461,073
Thereafter	207,107
Total	1,037,038
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA	913,388
Amortized Cost, AFS	1,950,426	$ 1,999,792
Fair Value, AFS
Due in one year or less	50,926
Due from one year to five years	297,914
Due from five to ten years	392,682
Thereafter	171,789
Total	913,311
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA	778,473
Fair value, total	1,691,784	2,006,727
Amortized Cost, HTM
Due in one year or less	0
Due from one year to five years	0
Due from five to ten years	0
Thereafter	207,059
Total	207,059
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA	0
Amortized Cost, HTM	207,059	$ 0
Fair Value, HTM
Due in one year or less	0
Due from one year to five years	0
Due from five to ten years	0
Thereafter	162,239
Total	162,239
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA	0
Fair Value	$ 162,239

Securities Available for Sale -

Securities Available for Sale - Proceeds, Gross Gains and Gross Losses from Sale (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Proceeds from sale	$ 0	$ 9,294	$ 13,862
Gross gains	0	13	385
Gross losses	$ 0	$ 0	$ 3

Securities - Summary of Unreali

Securities - Summary of Unrealized Losses and Fair Value of Securities in Continuous Unrealized Loss Positions (Details) $ in Thousands	Dec. 31, 2022 USD ($) security	Dec. 31, 2021 USD ($) security
Debt Securities, Available-for-sale [Line Items]
Less than 12 months: number of securities, AFS | security	599	192
Less than 12 months: estimated fair value, AFS	$ 670,035	$ 1,084,863
Less than 12 months: unrealized losses, AFS	$ (50,317)	$ (14,819)
Greater than 12 months: number of securities, AFS | security	226	35
Greater than 12 months: estimated fair value, AFS	$ 992,487	$ 168,138
Greater than 12 months: unrealized losses, AFS	(208,440)	(7,250)
Total: estimated fair value, AFS	1,662,522	1,253,001
Total: unrealized losses, AFS	$ (258,757)	$ (22,069)
U.S. treasuries
Debt Securities, Available-for-sale [Line Items]
Less than 12 months: number of securities, AFS | security	13	22
Less than 12 months: estimated fair value, AFS	$ 106,849	$ 144,172
Less than 12 months: unrealized losses, AFS	$ (3,923)	$ (678)
Greater than 12 months: number of securities, AFS | security	23	0
Greater than 12 months: estimated fair value, AFS	$ 132,561	$ 0
Greater than 12 months: unrealized losses, AFS	(16,342)	0
Total: estimated fair value, AFS	239,410	144,172
Total: unrealized losses, AFS	$ (20,265)	$ (678)
Government agency securities
Debt Securities, Available-for-sale [Line Items]
Less than 12 months: number of securities, AFS | security	13	38
Less than 12 months: estimated fair value, AFS	$ 63,451	$ 258,334
Less than 12 months: unrealized losses, AFS	$ (7,533)	$ (4,622)
Greater than 12 months: number of securities, AFS | security	62	22
Greater than 12 months: estimated fair value, AFS	$ 321,064	$ 119,963
Greater than 12 months: unrealized losses, AFS	(76,946)	(5,326)
Total: estimated fair value, AFS	384,515	378,297
Total: unrealized losses, AFS	$ (84,479)	$ (9,948)
Obligations of state and municipal subdivisions
Debt Securities, Available-for-sale [Line Items]
Less than 12 months: number of securities, AFS | security	339	14
Less than 12 months: estimated fair value, AFS	$ 209,395	$ 47,200
Less than 12 months: unrealized losses, AFS	$ (9,068)	$ (988)
Greater than 12 months: number of securities, AFS | security	9	2
Greater than 12 months: estimated fair value, AFS	$ 17,034	$ 3,555
Greater than 12 months: unrealized losses, AFS	(4,226)	(246)
Total: estimated fair value, AFS	226,429	50,755
Total: unrealized losses, AFS	$ (13,294)	$ (1,234)
Less than 12 months: number of securities, HTM | security	22
Less than 12 months: estimated fair value, HTM	$ 98,475
Less than 12 months: unrealized losses, HTM	$ (21,210)
Greater than 12 months: number of securities, HTM | security	21
Greater than 12 months: estimated fair value, HTM	$ 63,764
Greater than 12 months: unrealized losses, HTM	(23,610)
Total: estimated fair value, HTM	162,239
Total: unrealized losses, HTM	$ (44,820)
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Less than 12 months: number of securities, AFS | security	8	3
Less than 12 months: estimated fair value, AFS	$ 23,584	$ 13,440
Less than 12 months: unrealized losses, AFS	$ (4,416)	$ (60)
Greater than 12 months: number of securities, AFS | security	3	0
Greater than 12 months: estimated fair value, AFS	$ 10,621	$ 0
Greater than 12 months: unrealized losses, AFS	(1,379)	0
Total: estimated fair value, AFS	34,205	13,440
Total: unrealized losses, AFS	$ (5,795)	$ (60)
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA
Debt Securities, Available-for-sale [Line Items]
Less than 12 months: number of securities, AFS | security	226	115
Less than 12 months: estimated fair value, AFS	$ 266,756	$ 621,717
Less than 12 months: unrealized losses, AFS	$ (25,377)	$ (8,471)
Greater than 12 months: number of securities, AFS | security	129	11
Greater than 12 months: estimated fair value, AFS	$ 511,207	$ 44,620
Greater than 12 months: unrealized losses, AFS	(109,547)	(1,678)
Total: estimated fair value, AFS	777,963	666,337
Total: unrealized losses, AFS	$ (134,924)	$ (10,149)

Loans, Net and Allowance for _3

Loans, Net and Allowance for Credit Losses on Loans - Composition of Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accounts Notes And Loans Receivable [Line Items]
Loans	$ 13,909,363	$ 12,439,446
Allowance for credit losses	(148,787)	(148,706)	$ (87,820)	$ (51,461)
Total loans, net	13,760,576	12,290,740
Accrued Interest Receivable	48,815	41,051
Commercial
Accounts Notes And Loans Receivable [Line Items]
Loans	2,240,959	1,983,886
Allowance for credit losses	(54,037)	(49,747)	(27,311)	(12,844)
Mortgage warehouse purchase loans
Accounts Notes And Loans Receivable [Line Items]
Loans	312,099	788,848
Real estate | Commercial real estate
Accounts Notes And Loans Receivable [Line Items]
Loans	7,817,447	6,617,455
Allowance for credit losses	(61,078)	(65,110)	(36,698)	(24,371)
Real estate | Commercial construction, land and land development
Accounts Notes And Loans Receivable [Line Items]
Loans	1,231,071	1,180,181
Allowance for credit losses	(17,696)	(23,861)	(13,425)	(8,714)
Real estate | Residential Real Estate
Accounts Notes And Loans Receivable [Line Items]
Loans	1,592,859	1,300,122
Allowance for credit losses	(3,450)	(2,192)	(6,786)	(3,678)
Real estate | Single-family interim construction
Accounts Notes And Loans Receivable [Line Items]
Loans	508,839	380,627
Allowance for credit losses	(11,817)	(7,222)	(2,156)	(1,606)
Agricultural
Accounts Notes And Loans Receivable [Line Items]
Loans	124,422	106,512
Allowance for credit losses	(207)	(106)	(337)	(332)
Consumer
Accounts Notes And Loans Receivable [Line Items]
Loans	81,667	81,815
Allowance for credit losses	$ (502)	$ (468)	$ (684)	$ (231)

Loans, Net and Allowance for _4

Loans, Net and Allowance for Credit Losses on Loans - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2022 USD ($) modified_loan	Dec. 31, 2021 USD ($) contract modified_loan
Accounts Notes And Loans Receivable [Line Items]
Energy Related Commercial Loans	$ 13,760,576,000	$ 12,290,740,000
Troubled debt restructuring modification recorded investment	$ 2,423,000	$ 2,918,000
Number of contracts	0	3
Number of loans modified under troubled debt restructuring | modified_loan	0	0
Commitments to lend additional funds	$ 0	$ 0
Loans and Leases, Net | COLORADO | Geographic Concentration Risk
Accounts Notes And Loans Receivable [Line Items]
Percentage of portfolio	25%
Owner Occupied | Loans and Leases, Net | Customer Concentration Risk
Accounts Notes And Loans Receivable [Line Items]
Percentage of portfolio	23%
Commercial
Accounts Notes And Loans Receivable [Line Items]
Number of contracts | contract		2
Commercial | Paycheck Protection Program
Accounts Notes And Loans Receivable [Line Items]
PPP interest rate	1%
PPP loans outstanding	$ 4,958,000	$ 112,128,000
PPP deferred loan fees	(101,000)
PPP deferred loan fees		101,000
Commercial | Energy Related Loans
Accounts Notes And Loans Receivable [Line Items]
Energy Related Commercial Loans	$ 574,698,000	$ 342,776,000
Commercial | Mortgage warehouse purchase loans
Accounts Notes And Loans Receivable [Line Items]
Duration of the loans to larger mortgage originators	60 days
Agricultural
Accounts Notes And Loans Receivable [Line Items]
Number of contracts | contract		0
Agricultural | Real Estate Loan
Accounts Notes And Loans Receivable [Line Items]
Loan to value ratio (percent)	80%
Loan, amortization period	20 years
Agricultural | Non-Real Estate Loan
Accounts Notes And Loans Receivable [Line Items]
Period of operating lines	1 year
Consumer
Accounts Notes And Loans Receivable [Line Items]
Number of contracts | contract		1
Consumer | Loans and Leases, Net | Customer Concentration Risk
Accounts Notes And Loans Receivable [Line Items]
Percentage of portfolio	1%
Minimum | Commercial | Paycheck Protection Program
Accounts Notes And Loans Receivable [Line Items]
PPP term	2 years
Maximum | Commercial | Paycheck Protection Program
Accounts Notes And Loans Receivable [Line Items]
PPP term	5 years
Maximum | Commercial | Mortgage warehouse purchase loans
Accounts Notes And Loans Receivable [Line Items]
Duration of the loans to mortgage bankers	15 days

Loans, Net and Allowance for _5

Loans, Net and Allowance for Credit Losses on Loans - Rollforward of Activity in Credit Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	$ 148,706	$ 87,820	$ 51,461
Provision for credit losses	5,268	(12,609)	42,993
Charge-offs	(5,914)	(7,531)	(6,873)
Recoveries	727	111	239
Balance at end of period	148,787	148,706	87,820
Impact of ASC 326 adoption
Allowance for Loan and Lease Losses [Roll Forward]
Impact of adopting ASC 326		67,880
Initial allowance on loans purchased with credit deterioration		13,035
Commercial
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	49,747	27,311	12,844
Provision for credit losses	5,534	12,130	20,025
Charge-offs	(1,739)	(6,856)	(5,670)
Recoveries	495	59	112
Balance at end of period	54,037	49,747	27,311
Commercial | Impact of ASC 326 adoption
Allowance for Loan and Lease Losses [Roll Forward]
Impact of adopting ASC 326		12,775
Initial allowance on loans purchased with credit deterioration		4,328
Real estate | Commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	65,110	36,698	24,371
Provision for credit losses	(23)	(7,961)	13,058
Charge-offs	(4,159)	(375)	(735)
Recoveries	150	0	4
Balance at end of period	61,078	65,110	36,698
Real estate | Commercial real estate | Impact of ASC 326 adoption
Allowance for Loan and Lease Losses [Roll Forward]
Impact of adopting ASC 326		29,108
Initial allowance on loans purchased with credit deterioration		7,640
Real estate | Commercial construction, land and land development
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	23,861	13,425	8,714
Provision for credit losses	(6,165)	(12,373)	4,711
Charge-offs	0	(126)	0
Recoveries	0	0	0
Balance at end of period	17,696	23,861	13,425
Real estate | Commercial construction, land and land development | Impact of ASC 326 adoption
Allowance for Loan and Lease Losses [Roll Forward]
Impact of adopting ASC 326		22,008
Initial allowance on loans purchased with credit deterioration		927
Real estate | Residential Real Estate
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	2,192	6,786	3,678
Provision for credit losses	1,183	(2,486)	3,108
Charge-offs	(6)	0	0
Recoveries	81	7	0
Balance at end of period	3,450	2,192	6,786
Real estate | Residential Real Estate | Impact of ASC 326 adoption
Allowance for Loan and Lease Losses [Roll Forward]
Impact of adopting ASC 326		(2,255)
Initial allowance on loans purchased with credit deterioration		140
Real estate | Single-family interim construction
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	7,222	2,156	1,606
Provision for credit losses	4,595	(2,113)	632
Charge-offs	0	0	(82)
Recoveries	0	0	0
Balance at end of period	11,817	7,222	2,156
Real estate | Single-family interim construction | Impact of ASC 326 adoption
Allowance for Loan and Lease Losses [Roll Forward]
Impact of adopting ASC 326		7,179
Initial allowance on loans purchased with credit deterioration		0
Agricultural
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	106	337	332
Provision for credit losses	101	(53)	5
Charge-offs	0	0	0
Recoveries	0	0	0
Balance at end of period	207	106	337
Agricultural | Impact of ASC 326 adoption
Allowance for Loan and Lease Losses [Roll Forward]
Impact of adopting ASC 326		(178)
Initial allowance on loans purchased with credit deterioration		0
Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	468	684	231
Provision for credit losses	43	247	716
Charge-offs	(10)	(174)	(386)
Recoveries	1	45	123
Balance at end of period	502	468	684
Consumer | Impact of ASC 326 adoption
Allowance for Loan and Lease Losses [Roll Forward]
Impact of adopting ASC 326		(334)
Initial allowance on loans purchased with credit deterioration		0
Unallocated
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	0	423	(315)
Provision for credit losses	0	0	738
Charge-offs	0	0	0
Recoveries	0	0	0
Balance at end of period	$ 0	0	$ 423
Unallocated | Impact of ASC 326 adoption
Allowance for Loan and Lease Losses [Roll Forward]
Impact of adopting ASC 326		(423)
Initial allowance on loans purchased with credit deterioration		$ 0

Loans, Net and Allowance for _6

Loans, Net and Allowance for Credit Losses on Loans - Individually Evaluated Loans by Loan Class (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Impaired [Line Items]
Loan Balance	$ 34,473	$ 64,944
Specific Allocations	9,630	18,073
Commercial
Financing Receivable, Impaired [Line Items]
Loan Balance	21,981	38,911
Specific Allocations	8,378	15,958
Real estate | Commercial real estate
Financing Receivable, Impaired [Line Items]
Loan Balance	12,303	24,683
Specific Allocations	1,209	1,553
Real estate | Commercial construction, land and land development
Financing Receivable, Impaired [Line Items]
Loan Balance	0	1,350
Specific Allocations	0	562
Real estate | Residential Real Estate
Financing Receivable, Impaired [Line Items]
Loan Balance	0	0
Specific Allocations	0	0
Real estate | Single-family interim construction
Financing Receivable, Impaired [Line Items]
Loan Balance	189	0
Specific Allocations	43	0
Agricultural
Financing Receivable, Impaired [Line Items]
Loan Balance	0	0
Specific Allocations	0	0
Consumer
Financing Receivable, Impaired [Line Items]
Loan Balance	0	0
Specific Allocations	$ 0	$ 0

Loans, Net and Allowance for _7

Loans, Net and Allowance for Credit Losses on Loans - Summary of Non Performing Loans by Loan Class (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Accounts Notes And Loans Receivable [Line Items]
Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing)	$ 2,423	$ 2,918
Nonaccrual, No Allowance	125	18
Nonaccrual, Interest Income	0	0
Nonperforming Loans
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual loans	37,752	53,673
Loans past due 90 days and still accruing	843	1,790
Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing)	1,494	1,875
Total nonperforming loans	40,089	57,338
Nonperforming Loans | Commercial
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual loans	22,565	36,802
Loans past due 90 days and still accruing	5	187
Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing)	0	0
Total nonperforming loans	22,570	36,989
Nonperforming Loans | Real estate | Commercial real estate
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual loans	13,393	15,218
Loans past due 90 days and still accruing	0	0
Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing)	1,435	1,714
Total nonperforming loans	14,828	16,932
Nonperforming Loans | Real estate | Commercial construction, land and land development
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual loans	15	23
Loans past due 90 days and still accruing	0	0
Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing)	0	0
Total nonperforming loans	15	23
Nonperforming Loans | Real estate | Residential Real Estate
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual loans	1,582	1,592
Loans past due 90 days and still accruing	838	1,603
Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing)	59	161
Total nonperforming loans	2,479	3,356
Nonperforming Loans | Real estate | Single-family interim construction
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual loans	189	0
Loans past due 90 days and still accruing	0	0
Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing)	0	0
Total nonperforming loans	189	0
Nonperforming Loans | Agricultural
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual loans	0	0
Loans past due 90 days and still accruing	0	0
Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing)	0	0
Total nonperforming loans	0	0
Nonperforming Loans | Consumer
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual loans	8	38
Loans past due 90 days and still accruing	0	0
Troubled debt restructurings (not included in nonaccrual or loans past due and still accruing)	0	0
Total nonperforming loans	$ 8	$ 38

Loans, Net and Allowance for _8

Loans, Net and Allowance for Credit Losses on Loans - Summary of Troubled Debt Restructurings (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 modified_loan	Dec. 31, 2021 USD ($) contract
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts	0	3
Pre-restructuring outstanding recorded investment		$ 1,795
Post-restructuring outstanding recorded investment		$ 576
Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract		2
Pre-restructuring outstanding recorded investment		$ 1,789
Post-restructuring outstanding recorded investment		$ 570
Real estate | Commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract		0
Pre-restructuring outstanding recorded investment		$ 0
Post-restructuring outstanding recorded investment		$ 0
Real estate | Commercial construction, land and land development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract		0
Pre-restructuring outstanding recorded investment		$ 0
Post-restructuring outstanding recorded investment		$ 0
Real estate | Residential Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract		0
Pre-restructuring outstanding recorded investment		$ 0
Post-restructuring outstanding recorded investment		$ 0
Real estate | Single-family interim construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract		0
Pre-restructuring outstanding recorded investment		$ 0
Post-restructuring outstanding recorded investment		$ 0
Agricultural
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract		0
Pre-restructuring outstanding recorded investment		$ 0
Post-restructuring outstanding recorded investment		$ 0
Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract		1
Pre-restructuring outstanding recorded investment		$ 6
Post-restructuring outstanding recorded investment		$ 6

Loans, Net and Allowance for _9

Loans, Net and Allowance for Credit Losses on Loans - Aging of Past Due Loans by Loan Class (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Past Due [Line Items]
Loans	$ 13,909,363	$ 12,439,446
Commercial
Financing Receivable, Past Due [Line Items]
Loans	2,240,959	1,983,886
Mortgage warehouse purchase loans
Financing Receivable, Past Due [Line Items]
Loans	312,099	788,848
Real estate | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	7,817,447	6,617,455
Real estate | Commercial construction, land and land development
Financing Receivable, Past Due [Line Items]
Loans	1,231,071	1,180,181
Real estate | Residential Real Estate
Financing Receivable, Past Due [Line Items]
Loans	1,592,859	1,300,122
Real estate | Single-family interim construction
Financing Receivable, Past Due [Line Items]
Loans	508,839	380,627
Agricultural
Financing Receivable, Past Due [Line Items]
Loans	124,422	106,512
Consumer
Financing Receivable, Past Due [Line Items]
Loans	81,667	81,815
Loans 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	21,834	9,262
Loans 30-89 Days Past Due | Commercial
Financing Receivable, Past Due [Line Items]
Loans	1,005	1,041
Loans 30-89 Days Past Due | Mortgage warehouse purchase loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Loans 30-89 Days Past Due | Real estate | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	13,093	2,861
Loans 30-89 Days Past Due | Real estate | Commercial construction, land and land development
Financing Receivable, Past Due [Line Items]
Loans	2,820	0
Loans 30-89 Days Past Due | Real estate | Residential Real Estate
Financing Receivable, Past Due [Line Items]
Loans	4,702	3,838
Loans 30-89 Days Past Due | Real estate | Single-family interim construction
Financing Receivable, Past Due [Line Items]
Loans	0	1,290
Loans 30-89 Days Past Due | Agricultural
Financing Receivable, Past Due [Line Items]
Loans	0	16
Loans 30-89 Days Past Due | Consumer
Financing Receivable, Past Due [Line Items]
Loans	214	216
Loans 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Loans	7,621	24,762
Loans 90 Days or More Past Due | Commercial
Financing Receivable, Past Due [Line Items]
Loans	5,629	11,056
Loans 90 Days or More Past Due | Mortgage warehouse purchase loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Loans 90 Days or More Past Due | Real estate | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	449	11,784
Loans 90 Days or More Past Due | Real estate | Commercial construction, land and land development
Financing Receivable, Past Due [Line Items]
Loans	0	0
Loans 90 Days or More Past Due | Real estate | Residential Real Estate
Financing Receivable, Past Due [Line Items]
Loans	1,346	1,913
Loans 90 Days or More Past Due | Real estate | Single-family interim construction
Financing Receivable, Past Due [Line Items]
Loans	189	0
Loans 90 Days or More Past Due | Agricultural
Financing Receivable, Past Due [Line Items]
Loans	0	0
Loans 90 Days or More Past Due | Consumer
Financing Receivable, Past Due [Line Items]
Loans	8	9
Total Past Due Loans
Financing Receivable, Past Due [Line Items]
Loans	29,455	34,024
Total Past Due Loans | Commercial
Financing Receivable, Past Due [Line Items]
Loans	6,634	12,097
Total Past Due Loans | Mortgage warehouse purchase loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Total Past Due Loans | Real estate | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	13,542	14,645
Total Past Due Loans | Real estate | Commercial construction, land and land development
Financing Receivable, Past Due [Line Items]
Loans	2,820	0
Total Past Due Loans | Real estate | Residential Real Estate
Financing Receivable, Past Due [Line Items]
Loans	6,048	5,751
Total Past Due Loans | Real estate | Single-family interim construction
Financing Receivable, Past Due [Line Items]
Loans	189	1,290
Total Past Due Loans | Agricultural
Financing Receivable, Past Due [Line Items]
Loans	0	16
Total Past Due Loans | Consumer
Financing Receivable, Past Due [Line Items]
Loans	222	225
Current Loans
Financing Receivable, Past Due [Line Items]
Loans	13,879,908	12,405,422
Current Loans | Commercial
Financing Receivable, Past Due [Line Items]
Loans	2,234,325	1,971,789
Current Loans | Mortgage warehouse purchase loans
Financing Receivable, Past Due [Line Items]
Loans	312,099	788,848
Current Loans | Real estate | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	7,803,905	6,602,810
Current Loans | Real estate | Commercial construction, land and land development
Financing Receivable, Past Due [Line Items]
Loans	1,228,251	1,180,181
Current Loans | Real estate | Residential Real Estate
Financing Receivable, Past Due [Line Items]
Loans	1,586,811	1,294,371
Current Loans | Real estate | Single-family interim construction
Financing Receivable, Past Due [Line Items]
Loans	508,650	379,337
Current Loans | Agricultural
Financing Receivable, Past Due [Line Items]
Loans	124,422	106,496
Current Loans | Consumer
Financing Receivable, Past Due [Line Items]
Loans	$ 81,445	$ 81,590

Loans, Net and Allowance for_10

Loans, Net and Allowance for Credit Losses on Loans - Loans held for investment by year of origination and internally assigned credit grade (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	$ 4,872,542	$ 4,986,567
Term Loans by Year of Origination, year 2	3,476,292	2,062,363
Term Loans by Year of Origination, year 3	1,567,169	1,341,848
Term Loans by Year of Origination, year 4	948,031	1,061,979
Term Loans by Year of Origination, year 5	681,908	769,153
Term Loans by Year of Origination, Prior	1,063,052	1,208,460
Revolving Loans	1,278,724	990,512
Revolving Loans Converted to Term Loans	21,645	18,564
Total Loans	13,909,363	12,439,446
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	4,752,475	4,771,917
Term Loans by Year of Origination, year 2	3,308,718	1,995,309
Term Loans by Year of Origination, year 3	1,512,800	1,227,819
Term Loans by Year of Origination, year 4	901,769	933,094
Term Loans by Year of Origination, year 5	609,279	700,329
Term Loans by Year of Origination, Prior	969,726	1,051,269
Revolving Loans	1,248,852	930,290
Revolving Loans Converted to Term Loans	15,651	11,938
Total Loans	13,319,270	11,621,965
Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	101,430	73,849
Term Loans by Year of Origination, year 2	41,705	33,073
Term Loans by Year of Origination, year 3	44,758	49,665
Term Loans by Year of Origination, year 4	20,609	64,547
Term Loans by Year of Origination, year 5	55,357	45,251
Term Loans by Year of Origination, Prior	53,620	79,090
Revolving Loans	10,067	23,191
Revolving Loans Converted to Term Loans	5,907	4,638
Total Loans	333,453	373,304
Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	13,994	61,990
Term Loans by Year of Origination, year 2	46,688	16,887
Term Loans by Year of Origination, year 3	101	46,416
Term Loans by Year of Origination, year 4	13,055	37,335
Term Loans by Year of Origination, year 5	8,949	20,003
Term Loans by Year of Origination, Prior	12,103	25,714
Revolving Loans	8,772	13,011
Revolving Loans Converted to Term Loans	46	0
Total Loans	103,708	221,356
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	4,643	78,811
Term Loans by Year of Origination, year 2	79,181	17,094
Term Loans by Year of Origination, year 3	9,510	17,948
Term Loans by Year of Origination, year 4	12,598	27,003
Term Loans by Year of Origination, year 5	8,323	3,570
Term Loans by Year of Origination, Prior	27,603	52,387
Revolving Loans	11,033	14,123
Revolving Loans Converted to Term Loans	41	1,988
Total Loans	152,932	212,924
Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	0	0
Term Loans by Year of Origination, year 2	0	0
Term Loans by Year of Origination, year 3	0	0
Term Loans by Year of Origination, year 4	0	0
Term Loans by Year of Origination, year 5	0	0
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	0	9,897
Revolving Loans Converted to Term Loans	0	0
Total Loans	0	9,897
Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	0
Term Loans by Year of Origination, year 2	0
Term Loans by Year of Origination, year 3	0
Term Loans by Year of Origination, year 4	0
Term Loans by Year of Origination, year 5	0
Term Loans by Year of Origination, Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total Loans	0
Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	298,436	454,758
Term Loans by Year of Origination, year 2	403,362	187,165
Term Loans by Year of Origination, year 3	127,044	123,636
Term Loans by Year of Origination, year 4	123,751	88,830
Term Loans by Year of Origination, year 5	53,490	95,981
Term Loans by Year of Origination, Prior	168,550	278,180
Revolving Loans	1,059,185	744,798
Revolving Loans Converted to Term Loans	7,141	10,538
Total Loans	2,240,959	1,983,886
Commercial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	297,800	422,810
Term Loans by Year of Origination, year 2	347,801	183,433
Term Loans by Year of Origination, year 3	126,390	98,059
Term Loans by Year of Origination, year 4	112,887	78,357
Term Loans by Year of Origination, year 5	51,623	81,620
Term Loans by Year of Origination, Prior	153,435	255,213
Revolving Loans	1,031,483	690,242
Revolving Loans Converted to Term Loans	1,173	5,231
Total Loans	2,122,592	1,814,965
Commercial | Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	8	260
Term Loans by Year of Origination, year 2	14,790	3,010
Term Loans by Year of Origination, year 3	155	1,019
Term Loans by Year of Origination, year 4	188	3,135
Term Loans by Year of Origination, year 5	1,812	11,688
Term Loans by Year of Origination, Prior	7,934	65
Revolving Loans	8,216	18,768
Revolving Loans Converted to Term Loans	5,907	3,319
Total Loans	39,010	41,264
Commercial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	234	1,411
Term Loans by Year of Origination, year 2	4,821	117
Term Loans by Year of Origination, year 3	101	8,517
Term Loans by Year of Origination, year 4	1,485	7,244
Term Loans by Year of Origination, year 5	0	195
Term Loans by Year of Origination, Prior	144	4,571
Revolving Loans	8,646	12,885
Revolving Loans Converted to Term Loans	20	0
Total Loans	15,451	34,940
Commercial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	394	30,277
Term Loans by Year of Origination, year 2	35,950	605
Term Loans by Year of Origination, year 3	398	16,041
Term Loans by Year of Origination, year 4	9,191	94
Term Loans by Year of Origination, year 5	55	2,478
Term Loans by Year of Origination, Prior	7,037	18,331
Revolving Loans	10,840	13,006
Revolving Loans Converted to Term Loans	41	1,988
Total Loans	63,906	82,820
Commercial | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	0	0
Term Loans by Year of Origination, year 2	0	0
Term Loans by Year of Origination, year 3	0	0
Term Loans by Year of Origination, year 4	0	0
Term Loans by Year of Origination, year 5	0	0
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	0	9,897
Revolving Loans Converted to Term Loans	0	0
Total Loans	0	9,897
Commercial | Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	0
Term Loans by Year of Origination, year 2	0
Term Loans by Year of Origination, year 3	0
Term Loans by Year of Origination, year 4	0
Term Loans by Year of Origination, year 5	0
Term Loans by Year of Origination, Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total Loans	0
Mortgage warehouse purchase loans
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	312,099	788,848
Term Loans by Year of Origination, year 2	0	0
Term Loans by Year of Origination, year 3	0	0
Term Loans by Year of Origination, year 4	0	0
Term Loans by Year of Origination, year 5	0	0
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	312,099	788,848
Mortgage warehouse purchase loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	312,099	788,848
Term Loans by Year of Origination, year 2	0	0
Term Loans by Year of Origination, year 3	0	0
Term Loans by Year of Origination, year 4	0	0
Term Loans by Year of Origination, year 5	0	0
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	312,099	788,848
Mortgage warehouse purchase loans | Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	0	0
Term Loans by Year of Origination, year 2	0	0
Term Loans by Year of Origination, year 3	0	0
Term Loans by Year of Origination, year 4	0	0
Term Loans by Year of Origination, year 5	0	0
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	0	0
Mortgage warehouse purchase loans | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	0	0
Term Loans by Year of Origination, year 2	0	0
Term Loans by Year of Origination, year 3	0	0
Term Loans by Year of Origination, year 4	0	0
Term Loans by Year of Origination, year 5	0	0
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	0	0
Mortgage warehouse purchase loans | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	0	0
Term Loans by Year of Origination, year 2	0	0
Term Loans by Year of Origination, year 3	0	0
Term Loans by Year of Origination, year 4	0	0
Term Loans by Year of Origination, year 5	0	0
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	0	0
Mortgage warehouse purchase loans | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	0	0
Term Loans by Year of Origination, year 2	0	0
Term Loans by Year of Origination, year 3	0	0
Term Loans by Year of Origination, year 4	0	0
Term Loans by Year of Origination, year 5	0	0
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	0	0
Mortgage warehouse purchase loans | Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	0
Term Loans by Year of Origination, year 2	0
Term Loans by Year of Origination, year 3	0
Term Loans by Year of Origination, year 4	0
Term Loans by Year of Origination, year 5	0
Term Loans by Year of Origination, Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total Loans	0
Real estate | Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	2,756,304	2,328,368
Term Loans by Year of Origination, year 2	2,087,779	1,249,987
Term Loans by Year of Origination, year 3	1,041,148	908,414
Term Loans by Year of Origination, year 4	650,390	748,288
Term Loans by Year of Origination, year 5	519,217	552,252
Term Loans by Year of Origination, Prior	694,177	750,840
Revolving Loans	59,184	73,667
Revolving Loans Converted to Term Loans	9,248	5,639
Total Loans	7,817,447	6,617,455
Real estate | Commercial real estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	2,652,298	2,181,292
Term Loans by Year of Origination, year 2	1,980,631	1,198,508
Term Loans by Year of Origination, year 3	998,910	830,902
Term Loans by Year of Origination, year 4	617,664	645,470
Term Loans by Year of Origination, year 5	448,758	504,126
Term Loans by Year of Origination, Prior	640,275	626,292
Revolving Loans	59,184	71,850
Revolving Loans Converted to Term Loans	9,222	4,320
Total Loans	7,406,942	6,062,760
Real estate | Commercial real estate | Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	90,313	54,671
Term Loans by Year of Origination, year 2	25,954	18,591
Term Loans by Year of Origination, year 3	33,664	39,045
Term Loans by Year of Origination, year 4	18,678	60,955
Term Loans by Year of Origination, year 5	53,469	30,196
Term Loans by Year of Origination, Prior	25,831	74,762
Revolving Loans	0	752
Revolving Loans Converted to Term Loans	0	1,319
Total Loans	247,909	280,291
Real estate | Commercial real estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	10,180	56,142
Term Loans by Year of Origination, year 2	41,193	16,770
Term Loans by Year of Origination, year 3	0	37,331
Term Loans by Year of Origination, year 4	10,870	29,962
Term Loans by Year of Origination, year 5	8,722	17,649
Term Loans by Year of Origination, Prior	10,735	20,100
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	26	0
Total Loans	81,726	177,954
Real estate | Commercial real estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	3,513	36,263
Term Loans by Year of Origination, year 2	40,001	16,118
Term Loans by Year of Origination, year 3	8,574	1,136
Term Loans by Year of Origination, year 4	3,178	11,901
Term Loans by Year of Origination, year 5	8,268	281
Term Loans by Year of Origination, Prior	17,336	29,686
Revolving Loans	0	1,065
Revolving Loans Converted to Term Loans	0	0
Total Loans	80,870	96,450
Real estate | Commercial real estate | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	0	0
Term Loans by Year of Origination, year 2	0	0
Term Loans by Year of Origination, year 3	0	0
Term Loans by Year of Origination, year 4	0	0
Term Loans by Year of Origination, year 5	0	0
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	0	0
Real estate | Commercial real estate | Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	0
Term Loans by Year of Origination, year 2	0
Term Loans by Year of Origination, year 3	0
Term Loans by Year of Origination, year 4	0
Term Loans by Year of Origination, year 5	0
Term Loans by Year of Origination, Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total Loans	0
Real estate | Commercial construction, land and land development
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	562,753	651,568
Term Loans by Year of Origination, year 2	468,760	272,595
Term Loans by Year of Origination, year 3	137,001	105,263
Term Loans by Year of Origination, year 4	10,487	100,085
Term Loans by Year of Origination, year 5	23,073	15,688
Term Loans by Year of Origination, Prior	12,274	16,396
Revolving Loans	12,705	18,586
Revolving Loans Converted to Term Loans	4,018	0
Total Loans	1,231,071	1,180,181
Real estate | Commercial construction, land and land development | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	553,376	618,288
Term Loans by Year of Origination, year 2	465,272	262,136
Term Loans by Year of Origination, year 3	126,704	98,007
Term Loans by Year of Origination, year 4	10,477	85,596
Term Loans by Year of Origination, year 5	23,073	13,751
Term Loans by Year of Origination, Prior	12,188	14,939
Revolving Loans	12,705	18,586
Revolving Loans Converted to Term Loans	4,018	0
Total Loans	1,207,813	1,111,303
Real estate | Commercial construction, land and land development | Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	8,036	17,899
Term Loans by Year of Origination, year 2	43	10,459
Term Loans by Year of Origination, year 3	10,297	6,869
Term Loans by Year of Origination, year 4	0	0
Term Loans by Year of Origination, year 5	0	0
Term Loans by Year of Origination, Prior	72	84
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	18,448	35,311
Real estate | Commercial construction, land and land development | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	1,313	3,780
Term Loans by Year of Origination, year 2	674	0
Term Loans by Year of Origination, year 3	0	0
Term Loans by Year of Origination, year 4	0	0
Term Loans by Year of Origination, year 5	0	1,909
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	1,987	5,689
Real estate | Commercial construction, land and land development | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	28	11,601
Term Loans by Year of Origination, year 2	2,771	0
Term Loans by Year of Origination, year 3	0	387
Term Loans by Year of Origination, year 4	10	14,489
Term Loans by Year of Origination, year 5	0	28
Term Loans by Year of Origination, Prior	14	1,373
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	2,823	27,878
Real estate | Commercial construction, land and land development | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	0	0
Term Loans by Year of Origination, year 2	0	0
Term Loans by Year of Origination, year 3	0	0
Term Loans by Year of Origination, year 4	0	0
Term Loans by Year of Origination, year 5	0	0
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	0	0
Real estate | Commercial construction, land and land development | Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	0
Term Loans by Year of Origination, year 2	0
Term Loans by Year of Origination, year 3	0
Term Loans by Year of Origination, year 4	0
Term Loans by Year of Origination, year 5	0
Term Loans by Year of Origination, Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total Loans	0
Real estate | Residential Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	528,979	410,718
Term Loans by Year of Origination, year 2	381,162	268,003
Term Loans by Year of Origination, year 3	221,257	193,112
Term Loans by Year of Origination, year 4	158,122	115,669
Term Loans by Year of Origination, year 5	79,740	91,650
Term Loans by Year of Origination, Prior	162,408	158,067
Revolving Loans	59,953	60,559
Revolving Loans Converted to Term Loans	1,238	2,344
Total Loans	1,592,859	1,300,122
Real estate | Residential Real Estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	525,631	408,402
Term Loans by Year of Origination, year 2	379,789	267,147
Term Loans by Year of Origination, year 3	220,077	190,890
Term Loans by Year of Origination, year 4	155,460	114,616
Term Loans by Year of Origination, year 5	79,437	88,295
Term Loans by Year of Origination, Prior	154,875	149,871
Revolving Loans	59,332	60,212
Revolving Loans Converted to Term Loans	1,238	2,344
Total Loans	1,575,839	1,281,777
Real estate | Residential Real Estate | Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	373	1,019
Term Loans by Year of Origination, year 2	918	487
Term Loans by Year of Origination, year 3	642	1,270
Term Loans by Year of Origination, year 4	1,743	405
Term Loans by Year of Origination, year 5	76	2,331
Term Loans by Year of Origination, Prior	3,312	4,179
Revolving Loans	302	169
Revolving Loans Converted to Term Loans	0	0
Total Loans	7,366	9,860
Real estate | Residential Real Estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	2,267	657
Term Loans by Year of Origination, year 2	0	0
Term Loans by Year of Origination, year 3	0	568
Term Loans by Year of Origination, year 4	700	129
Term Loans by Year of Origination, year 5	227	250
Term Loans by Year of Origination, Prior	1,224	1,043
Revolving Loans	126	126
Revolving Loans Converted to Term Loans	0	0
Total Loans	4,544	2,773
Real estate | Residential Real Estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	708	640
Term Loans by Year of Origination, year 2	455	369
Term Loans by Year of Origination, year 3	538	384
Term Loans by Year of Origination, year 4	219	519
Term Loans by Year of Origination, year 5	0	774
Term Loans by Year of Origination, Prior	2,997	2,974
Revolving Loans	193	52
Revolving Loans Converted to Term Loans	0	0
Total Loans	5,110	5,712
Real estate | Residential Real Estate | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	0	0
Term Loans by Year of Origination, year 2	0	0
Term Loans by Year of Origination, year 3	0	0
Term Loans by Year of Origination, year 4	0	0
Term Loans by Year of Origination, year 5	0	0
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	0	0
Real estate | Residential Real Estate | Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	0
Term Loans by Year of Origination, year 2	0
Term Loans by Year of Origination, year 3	0
Term Loans by Year of Origination, year 4	0
Term Loans by Year of Origination, year 5	0
Term Loans by Year of Origination, Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total Loans	0
Real estate | Single-family interim construction
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	351,031	305,267
Term Loans by Year of Origination, year 2	105,573	59,584
Term Loans by Year of Origination, year 3	18,885	2,801
Term Loans by Year of Origination, year 4	0	312
Term Loans by Year of Origination, year 5	241	0
Term Loans by Year of Origination, Prior	16,660	0
Revolving Loans	16,449	12,663
Revolving Loans Converted to Term Loans	0	0
Total Loans	508,839	380,627
Real estate | Single-family interim construction | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	351,031	305,267
Term Loans by Year of Origination, year 2	105,573	59,584
Term Loans by Year of Origination, year 3	18,885	2,801
Term Loans by Year of Origination, year 4	0	312
Term Loans by Year of Origination, year 5	241	0
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	16,447	12,663
Revolving Loans Converted to Term Loans	0	0
Total Loans	492,177	380,627
Real estate | Single-family interim construction | Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	0	0
Term Loans by Year of Origination, year 2	0	0
Term Loans by Year of Origination, year 3	0	0
Term Loans by Year of Origination, year 4	0	0
Term Loans by Year of Origination, year 5	0	0
Term Loans by Year of Origination, Prior	16,471	0
Revolving Loans	2	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	16,473	0
Real estate | Single-family interim construction | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	0	0
Term Loans by Year of Origination, year 2	0	0
Term Loans by Year of Origination, year 3	0	0
Term Loans by Year of Origination, year 4	0	0
Term Loans by Year of Origination, year 5	0	0
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	0	0
Real estate | Single-family interim construction | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	0	0
Term Loans by Year of Origination, year 2	0	0
Term Loans by Year of Origination, year 3	0	0
Term Loans by Year of Origination, year 4	0	0
Term Loans by Year of Origination, year 5	0	0
Term Loans by Year of Origination, Prior	189	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	189	0
Real estate | Single-family interim construction | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	0	0
Term Loans by Year of Origination, year 2	0	0
Term Loans by Year of Origination, year 3	0	0
Term Loans by Year of Origination, year 4	0	0
Term Loans by Year of Origination, year 5	0	0
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	0	0
Real estate | Single-family interim construction | Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	0
Term Loans by Year of Origination, year 2	0
Term Loans by Year of Origination, year 3	0
Term Loans by Year of Origination, year 4	0
Term Loans by Year of Origination, year 5	0
Term Loans by Year of Origination, Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total Loans	0
Agricultural
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	55,225	36,442
Term Loans by Year of Origination, year 2	24,743	15,531
Term Loans by Year of Origination, year 3	13,875	5,916
Term Loans by Year of Origination, year 4	3,705	8,085
Term Loans by Year of Origination, year 5	5,847	13,264
Term Loans by Year of Origination, Prior	8,892	4,779
Revolving Loans	12,135	22,495
Revolving Loans Converted to Term Loans	0	0
Total Loans	124,422	106,512
Agricultural | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	52,525	36,442
Term Loans by Year of Origination, year 2	24,743	15,005
Term Loans by Year of Origination, year 3	13,875	4,454
Term Loans by Year of Origination, year 4	3,705	8,033
Term Loans by Year of Origination, year 5	5,847	12,229
Term Loans by Year of Origination, Prior	8,872	4,773
Revolving Loans	10,588	18,993
Revolving Loans Converted to Term Loans	0	0
Total Loans	120,155	99,929
Agricultural | Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	2,700	0
Term Loans by Year of Origination, year 2	0	526
Term Loans by Year of Origination, year 3	0	1,462
Term Loans by Year of Origination, year 4	0	52
Term Loans by Year of Origination, year 5	0	1,035
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	1,547	3,502
Revolving Loans Converted to Term Loans	0	0
Total Loans	4,247	6,577
Agricultural | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	0	0
Term Loans by Year of Origination, year 2	0	0
Term Loans by Year of Origination, year 3	0	0
Term Loans by Year of Origination, year 4	0	0
Term Loans by Year of Origination, year 5	0	0
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	0	0
Agricultural | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	0	0
Term Loans by Year of Origination, year 2	0	0
Term Loans by Year of Origination, year 3	0	0
Term Loans by Year of Origination, year 4	0	0
Term Loans by Year of Origination, year 5	0	0
Term Loans by Year of Origination, Prior	20	6
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	20	6
Agricultural | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	0	0
Term Loans by Year of Origination, year 2	0	0
Term Loans by Year of Origination, year 3	0	0
Term Loans by Year of Origination, year 4	0	0
Term Loans by Year of Origination, year 5	0	0
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	0	0
Agricultural | Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	0
Term Loans by Year of Origination, year 2	0
Term Loans by Year of Origination, year 3	0
Term Loans by Year of Origination, year 4	0
Term Loans by Year of Origination, year 5	0
Term Loans by Year of Origination, Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total Loans	0
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	7,715	10,598
Term Loans by Year of Origination, year 2	4,913	9,498
Term Loans by Year of Origination, year 3	7,959	2,706
Term Loans by Year of Origination, year 4	1,576	710
Term Loans by Year of Origination, year 5	300	318
Term Loans by Year of Origination, Prior	91	198
Revolving Loans	59,113	57,744
Revolving Loans Converted to Term Loans	0	43
Total Loans	81,667	81,815
Consumer | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	7,715	10,568
Term Loans by Year of Origination, year 2	4,909	9,496
Term Loans by Year of Origination, year 3	7,959	2,706
Term Loans by Year of Origination, year 4	1,576	710
Term Loans by Year of Origination, year 5	300	308
Term Loans by Year of Origination, Prior	81	181
Revolving Loans	59,113	57,744
Revolving Loans Converted to Term Loans	0	43
Total Loans	81,653	81,756
Consumer | Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	0	0
Term Loans by Year of Origination, year 2	0	0
Term Loans by Year of Origination, year 3	0	0
Term Loans by Year of Origination, year 4	0	0
Term Loans by Year of Origination, year 5	0	1
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	0	1
Consumer | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	0	0
Term Loans by Year of Origination, year 2	0	0
Term Loans by Year of Origination, year 3	0	0
Term Loans by Year of Origination, year 4	0	0
Term Loans by Year of Origination, year 5	0	0
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	0	0
Consumer | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	0	30
Term Loans by Year of Origination, year 2	4	2
Term Loans by Year of Origination, year 3	0	0
Term Loans by Year of Origination, year 4	0	0
Term Loans by Year of Origination, year 5	0	9
Term Loans by Year of Origination, Prior	10	17
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	14	58
Consumer | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	0	0
Term Loans by Year of Origination, year 2	0	0
Term Loans by Year of Origination, year 3	0	0
Term Loans by Year of Origination, year 4	0	0
Term Loans by Year of Origination, year 5	0	0
Term Loans by Year of Origination, Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans	0	$ 0
Consumer | Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Term Loans by Year of Origination, current	0
Term Loans by Year of Origination, year 2	0
Term Loans by Year of Origination, year 3	0
Term Loans by Year of Origination, year 4	0
Term Loans by Year of Origination, year 5	0
Term Loans by Year of Origination, Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total Loans	$ 0

Premises and Equipment, Net - C

Premises and Equipment, Net - Components of Premises and Equipment, Net (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Abstract]
Land	$ 81,570	$ 78,900
Building	274,218	193,475
Furniture, fixtures and equipment	59,979	47,576
Aircraft	8,947	8,947
Leasehold and tenant improvements	6,421	5,834
Construction in progress	3,667	45,263
Premises and equipment, gross	434,802	379,995
Less accumulated depreciation	(79,434)	(71,972)
Premises and equipment, net	$ 355,368	$ 308,023

Premises and Equipment, Net - A

Premises and Equipment, Net - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Abstract]
Depreciation expense	$ 14,934	$ 12,385	$ 12,728

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets, Net - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 994,021	$ 994,021
Amortization of other intangible assets	$ 12,491	$ 12,580	$ 12,671
Remaining weighted averaged amortization period	5 years 7 months 6 days

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets, Net - Gross Carrying Value and Accumulated Amortization of Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Acquired Finite-Lived Intangible Assets [Line Items]
Total other intangible assets, net	$ 62,999	$ 75,490
Core deposit intangibles
Acquired Finite-Lived Intangible Assets [Line Items]
Gross other intangible assets	125,884	125,884
Less accumulated amortization	(67,321)	(55,323)
Total other intangible assets, net	58,563	70,561
Customer relationship intangibles
Acquired Finite-Lived Intangible Assets [Line Items]
Gross other intangible assets	6,407	6,407
Less accumulated amortization	(1,971)	(1,478)
Total other intangible assets, net	$ 4,436	$ 4,929

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets, Net - Future Amortization Expense Related to Core Deposit Intangible (Detail) $ in Thousands	Dec. 31, 2022 USD ($)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
First year	$ 12,439
Second year	11,752
Third year	11,238
Fourth year	10,801
Fifth year	8,284
Thereafter	8,485
Future amortization expense	$ 62,999

Deposits - Components of Deposi

Deposits - Components of Deposits (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Amount
Noninterest-bearing demand accounts	$ 4,736,830	$ 5,066,588
Interest-bearing checking accounts	6,311,868	6,234,344
Savings accounts	760,777	758,727
Money market accounts	1,889,833	2,431,965
Certificates of deposit and individual retirement accounts (IRA), less than $250,000	752,594	540,011
Certificates of deposit and individual retirement accounts (IRA), $250,000 and greater	669,515	522,273
Total deposits	$ 15,121,417	$ 15,553,908
Percent
Noninterest-bearing demand accounts (percent)	31.30%	32.60%
Interest-bearing checking accounts (percent)	41.80%	40.10%
Savings accounts (percent)	5%	4.90%
Limited access money market accounts (percent)	12.50%	15.60%
Certificates of deposit and individual retirement accounts (IRA), less than $250,000 (percent)	5%	3.50%
Certificates of deposit and individual retirement account (IRA), $250,000 and greater (percent)	4.40%	3.30%
Total deposits (percent)	100%	100%

Deposits - Maturities of Certif

Deposits - Maturities of Certificates of Deposit (Detail) $ in Thousands	Dec. 31, 2022 USD ($)
Time Deposits, Fiscal Year Maturity [Abstract]
First year	$ 951,731
Second year	342,232
Third year	112,691
Fourth year	7,892
Fifth year	7,563
Total	$ 1,422,109

Deposits - Additional Informati

Deposits - Additional Information (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Deposits [Abstract]
Brokered deposit	$ 528,937	$ 909,665

Federal Home Loan Bank Advanc_3

Federal Home Loan Bank Advances - Additional Information (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Weighted average interest rate on advances (percent)	2.42%	0.48%
Outstanding balances of advances	$ 300,000	$ 150,000
Federal Home Loan Bank Stock	20,387
Carrying value of loans with blanket lien	5,926,858
Remaining credit facility under FHLB advances	4,640,162
Federal Home Loan Bank Advances
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Undisbursed advance commitments (letter of credit)	$ 976,390

Federal Home Loan Bank Advanc_4

Federal Home Loan Bank Advances - Schedule of Outstanding Balances on Advances (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Advance from Federal Home Loan Bank, Fiscal Year Maturity [Abstract]
First year	$ 0
Second year	0
Third year	0
Fourth year	0
Fifth year	100,000
Thereafter	200,000
FHLB advances	$ 300,000	$ 150,000

Other Borrowings - Other Borrow

Other Borrowings - Other Borrowings (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Other borrowings	$ 267,066,000	$ 283,371,000
Other borrowings, related parties	50,000	50,000
5.875% Subordinated Notes Due August 1, 2024
Debt Instrument [Line Items]
Subordinated debt	109,445,000	109,087,000
Debt original amount	$ 110,000,000
Stated interest rate (percent)	5.875%
Discount and origination costs	$ 555,000	913,000
5.00% Subordinated Debenture Notes Due December 31, 2027
Debt Instrument [Line Items]
Subordinated debt	29,612,000	29,535,000
Debt original amount	$ 30,000,000	30,000,000
Stated interest rate (percent)	5%
Origination costs	$ 388,000	465,000
Unsecured Subordinated Debenture Notes Due September 15, 2030
Debt Instrument [Line Items]
Subordinated debt	128,009,000	127,749,000
Debt original amount	$ 130,000,000	130,000,000
Stated interest rate (percent)	4%
Origination costs	$ 1,991,000	2,251,000
London Interbank Offered Rate (LIBOR) | 5.00% Subordinated Debenture Notes Due December 31, 2027
Debt Instrument [Line Items]
Basis spread on variable rate	2.83%
Secured Overnight Financing Rate (SOFR) | Unsecured Subordinated Debenture Notes Due September 15, 2030
Debt Instrument [Line Items]
Basis spread on variable rate	3.885%
Line of Credit | Line of Credit | Revolving line of credit
Debt Instrument [Line Items]
Line of Credit Facility, Outstanding Balance	$ 0	$ 17,000,000
Line of credit, maximum capacity	$ 100,000,000
Line of Credit | Line of Credit | Bloomberg Short-Term Bank Yield Index (BSBY) | Revolving line of credit
Debt Instrument [Line Items]
Basis spread on variable rate	1.75%

Other Borrowings - Additional I

Other Borrowings - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2022 USD ($) unaffiliated_bank Number_of_Lines	Dec. 31, 2021 USD ($) unaffiliated_bank
Federal Funds Line of Credit | Line of Credit
Line of Credit Facility [Line Items]
Number of unaffiliated banks | unaffiliated_bank	11	11
Line of credit, maximum capacity	$ 545,000,000	$ 400,000,000
Outstanding borrowings on line of credit	0	0
Secured Debt | Line of Credit
Line of Credit Facility [Line Items]
Line of credit, maximum capacity	1,072,483,000	851,051,000
Outstanding borrowings on line of credit	0	0
Line of credit, collateral	1,326,376,000	1,195,362,000
Unsecured Debt | Direct Overnight Borrowings | Line of Credit
Line of Credit Facility [Line Items]
Line of credit, maximum capacity	809,000,000	814,000,000
Outstanding borrowings on line of credit	0	$ 0
Line of Credit | Federal Funds Line of Credit
Line of Credit Facility [Line Items]
Line of credit, maximum capacity	$ 115,000,000
Number of lines | Number_of_Lines	3

Junior Subordinated Debenture_2

Junior Subordinated Debentures - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) business_trust	Dec. 31, 2021 USD ($)
Debt Instrument [Line Items]
Number of wholly owned statutory business trusts | business_trust	9
Trust Preferred Securities Issued	$ 57,324
Junior subordinated debentures, carrying value	54,419	$ 54,221
Junior subordinated debentures, unamortized discount	2,905
IB Trust I
Debt Instrument [Line Items]
Trust Preferred Securities Issued	5,155
Junior subordinated debentures, carrying value	$ 5,155
Interest Rate	7.69%
Guaranty Trust III
Debt Instrument [Line Items]
Trust Preferred Securities Issued	$ 10,310
Junior subordinated debentures, carrying value	$ 10,310
Interest Rate	7.18%
IB Trust II
Debt Instrument [Line Items]
Trust Preferred Securities Issued	$ 3,093
Junior subordinated debentures, carrying value	$ 3,093
Interest Rate	6.93%
Cenbank Trust III
Debt Instrument [Line Items]
Trust Preferred Securities Issued	$ 15,464
Junior subordinated debentures, carrying value	$ 15,464
Interest Rate	6.73%
IB Trust III
Debt Instrument [Line Items]
Trust Preferred Securities Issued	$ 3,712
Junior subordinated debentures, carrying value	$ 3,712
Interest Rate	7.09%
IB Centex Trust I
Debt Instrument [Line Items]
Trust Preferred Securities Issued	$ 2,578
Junior subordinated debentures, carrying value	$ 2,578
Interest Rate	7.94%
Community Group Statutory Trust I
Debt Instrument [Line Items]
Trust Preferred Securities Issued	$ 3,609
Junior subordinated debentures, carrying value	$ 3,609
Interest Rate	6.37%
Northstar Trust II
Debt Instrument [Line Items]
Trust Preferred Securities Issued	$ 5,155
Junior subordinated debentures, carrying value	$ 4,045
Interest Rate	6.44%
Northstar Trust III
Debt Instrument [Line Items]
Trust Preferred Securities Issued	$ 8,248
Junior subordinated debentures, carrying value	$ 6,453
Interest Rate	6.44%
London Interbank Offered Rate (LIBOR) | IB Trust I
Debt Instrument [Line Items]
Description of variable rate basis	LIBOR
Interest Rate Index	3.25%
London Interbank Offered Rate (LIBOR) | Guaranty Trust III
Debt Instrument [Line Items]
Description of variable rate basis	LIBOR
Interest Rate Index	3.10%
London Interbank Offered Rate (LIBOR) | IB Trust II
Debt Instrument [Line Items]
Description of variable rate basis	LIBOR
Interest Rate Index	2.85%
London Interbank Offered Rate (LIBOR) | Cenbank Trust III
Debt Instrument [Line Items]
Description of variable rate basis	LIBOR
Interest Rate Index	2.65%
London Interbank Offered Rate (LIBOR) | IB Trust III
Debt Instrument [Line Items]
Description of variable rate basis	LIBOR
Interest Rate Index	2.40%
London Interbank Offered Rate (LIBOR) | IB Centex Trust I
Debt Instrument [Line Items]
Description of variable rate basis	LIBOR
Interest Rate Index	3.25%
London Interbank Offered Rate (LIBOR) | Community Group Statutory Trust I
Debt Instrument [Line Items]
Description of variable rate basis	LIBOR
Interest Rate Index	1.60%
London Interbank Offered Rate (LIBOR) | Northstar Trust II
Debt Instrument [Line Items]
Description of variable rate basis	LIBOR
Interest Rate Index	1.67%
London Interbank Offered Rate (LIBOR) | Northstar Trust III
Debt Instrument [Line Items]
Description of variable rate basis	LIBOR
Interest Rate Index	1.67%

Leases - Additional Information

Leases - Additional Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) branch	Dec. 31, 2021 USD ($)
Lessee, Lease, Description [Line Items]
Number of branches leased | branch	21
Number of branches operated | branch	93
Right-of-use assets | $	$ 24,830	$ 24,126
Lease liability | $	$ 25,913	$ 23,573
Minimum
Lessee, Lease, Description [Line Items]
Operating leases, remaining term	3 months
Maximum
Lessee, Lease, Description [Line Items]
Operating leases, remaining term	28 years 1 month 6 days

Leases - Schedule of Net Lease

Leases - Schedule of Net Lease Cost and Other Information Related to Operating Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Operating lease cost	$ 6,559	$ 6,567	$ 6,937
Short term lease cost	121	64	124
Variable lease cost	1,455	1,645	1,631
Sublease income	(268)	(282)	(221)
Net lease cost	7,867	7,994	$ 8,471
Operating cash flows from operating leases	$ 5,743	$ 5,740
Weighted average remaining lease term - operating leases, in years	7 years 2 months 8 days	7 years 4 months 28 days
Weighted average discount rate - operating leases	2.97%	3.01%

Leases - Summary of Lease Liabi

Leases - Summary of Lease Liability Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Leases [Abstract]
2023	$ 5,397
2024	5,123
2025	4,329
2026	2,895
2027	2,090
Thereafter	9,000
Total lease payments	28,834
Less imputed interest	(2,921)
Lease liability	$ 25,913	$ 23,573

Off-Balance Sheet Arrangement_3

Off-Balance Sheet Arrangements, Commitments and Contingencies (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Financial instruments with off-balance sheet risk	$ 3,315,544	$ 2,800,043
Commitments to extend credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Financial instruments with off-balance sheet risk	3,291,409	2,770,036
Standby letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Financial instruments with off-balance sheet risk	$ 24,135	$ 30,007

Off-Balance Sheet Arrangement_4

Off-Balance Sheet Arrangements, Commitments and Contingencies - Allowance for Off-Balance Sheet Credit Exposure (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period	$ 4,722	$ 0	$ 0
Provision for off-balance sheet credit exposure	(778)	3,609	0
Balance at end of period	3,944	4,722	0
Impact of ASC 326 adoption
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period	$ 0	1,113	0
Balance at end of period		$ 0	$ 1,113

Income Taxes - Tax Expense (Det

Income Taxes - Tax Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Current income tax expense	$ 44,836	$ 52,130	$ 52,806
Deferred income tax expense (benefit)	5,168	5,353	(1,633)
Income tax expense, as reported	$ 50,004	$ 57,483	$ 51,173

Income Taxes - Tax Reconciliati

Income Taxes - Tax Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income tax expense computed at the statutory rate	$ 51,722	$ 59,269	$ 53,000
Tax-exempt interest income from municipal securities	(2,176)	(1,752)	(1,779)
Tax-exempt loan income	(1,116)	(1,359)	(1,245)
Bank owned life insurance income	(1,296)	(1,094)	(1,123)
State taxes, net of federal benefit	2,045	2,516	2,660
Non-deductible compensation	919	473	0
Net tax (benefit) expense from stock based compensation	(703)	(691)	243
Other	609	121	(583)
Income tax expense, as reported	$ 50,004	$ 57,483	$ 51,173

Income Taxes - Components of De

Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Jan. 01, 2021
Deferred tax assets:
Allowance for loan losses	$ 33,241	$ 33,463	$ 15,113
Net unrealized loss on available for sale securities	54,315	0
Lease liabilities under operating leases	5,640	5,141
NOL and tax credit carryforwards from acquisitions	2,986	3,354
Net unrealized loss on cash flow hedge	2,351	221
Acquired loan fair market value adjustments	3,785	5,750
Stock-based compensation	2,496	1,822
Reserve for bonuses and other accrued expenses	4,163	3,775
Deferred loan fees and costs, net	3,738	2,800
Acquired securities	1,107	1,611
Acquired intangibles	1,060	1,213
Unearned income	420	503
Deferred compensation	416	628
Noncompete agreements	484	540
Nonaccrual loans	268	463
Other	868	663
Deferred tax assets, gross	117,338	61,947
Deferred tax liabilities:
Premises and equipment	(16,920)	(10,376)
Right-of-use assets under operating leases	(5,404)	(4,934)
Net unrealized gain on available for sale securities	0	(1,457)
Intangible assets	(13,711)	(16,464)
Acquired junior subordinated debentures fair value adjustment	(632)	(677)
FHLB and other restricted stocks	(359)	(335)
Acquired tax goodwill	(899)	(735)
Other	(744)	(791)
Deferred tax liabilities, gross	(38,669)	(35,769)
Net deferred tax asset	$ 78,669	$ 26,178

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Operating Loss Carryforwards [Line Items]
Valuation allowance	$ 0	$ 0
Federal Tax Authority
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	12,708,000
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 9,141,000

Related Party Transactions - Lo

Related Party Transactions - Loan Activity for Officers, Directors and Affiliates (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)
Loans and Leases Receivable, Related Parties [Roll Forward]
Balance at beginning of year	$ 34,627
New loan originations	13,641
Repayments	(13,545)
Changes in affiliated persons	1,075
Balance at end of year	$ 35,798

Employee Benefit Plans - Additi

Employee Benefit Plans - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Retirement Benefits [Abstract]
Minimum age	18 years
Credited service period	30 days
Employer contribution, matching percentage (percent)	100%	100%	100%
Employer contribution as percentage of participant's eligible salary (percent)	6%	6%	6%
Employer contribution, amount	$ 8,007	$ 7,011	$ 6,534

Fair Value Measurements - Asset

Fair Value Measurements - Assets and Liabilities at Fair Value on Recurring Basis (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Loans held for sale, fair value option elected	$ 10,612,000	$ 28,249,000
Aggregate principal balance of loans held for sale	10,330,000	27,176,000
Loans held for sale, 90 days or greater past due	0
Loans held for sale, non-accrual	0
Derivatives not designated as hedging instruments | Interest rate lock commitments
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Asset Derivative Fair Value	294,000	1,029,000
Liability Derivative Fair Value	6,000	4,000
Derivatives not designated as hedging instruments | Forward mortgage-backed securities trades
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Asset Derivative Fair Value	98,000	27,000
Liability Derivative Fair Value	11,000	21,000
Derivatives designated as hedging instruments | Interest rate swaps
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Asset Derivative Fair Value	0	0
Liability Derivative Fair Value	11,283,000	1,158,000
Fair Value, Measurements, Recurring | Derivatives not designated as hedging instruments
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Loans held for sale, fair value option elected	10,612,000	28,249,000
Fair Value, Measurements, Recurring | Derivatives not designated as hedging instruments | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Loans held for sale, fair value option elected	0	0
Fair Value, Measurements, Recurring | Derivatives not designated as hedging instruments | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Loans held for sale, fair value option elected	10,612,000	28,249,000
Fair Value, Measurements, Recurring | Derivatives not designated as hedging instruments | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Loans held for sale, fair value option elected	0	0
Fair Value, Measurements, Recurring | Derivatives not designated as hedging instruments | Interest rate lock commitments
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Asset Derivative Fair Value	294,000	1,029,000
Liability Derivative Fair Value	6,000	4,000
Fair Value, Measurements, Recurring | Derivatives not designated as hedging instruments | Interest rate lock commitments | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Asset Derivative Fair Value	0	0
Liability Derivative Fair Value	0	0
Fair Value, Measurements, Recurring | Derivatives not designated as hedging instruments | Interest rate lock commitments | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Asset Derivative Fair Value	294,000	1,029,000
Liability Derivative Fair Value	6,000	4,000
Fair Value, Measurements, Recurring | Derivatives not designated as hedging instruments | Interest rate lock commitments | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Asset Derivative Fair Value	0	0
Liability Derivative Fair Value	0	0
Fair Value, Measurements, Recurring | Derivatives not designated as hedging instruments | Forward mortgage-backed securities trades
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Asset Derivative Fair Value	98,000	27,000
Liability Derivative Fair Value	11,000	21,000
Fair Value, Measurements, Recurring | Derivatives not designated as hedging instruments | Forward mortgage-backed securities trades | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Asset Derivative Fair Value	0	0
Liability Derivative Fair Value	0	0
Fair Value, Measurements, Recurring | Derivatives not designated as hedging instruments | Forward mortgage-backed securities trades | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Asset Derivative Fair Value	98,000	27,000
Liability Derivative Fair Value	11,000	21,000
Fair Value, Measurements, Recurring | Derivatives not designated as hedging instruments | Forward mortgage-backed securities trades | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Asset Derivative Fair Value	0	0
Liability Derivative Fair Value	0	0
Fair Value, Measurements, Recurring | Derivatives not designated as hedging instruments | Interest rate swaps | Loan customer counterparty
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Asset Derivative Fair Value		6,459,000
Liability Derivative Fair Value	13,788,000	1,073,000
Fair Value, Measurements, Recurring | Derivatives not designated as hedging instruments | Interest rate swaps | Loan customer counterparty | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Asset Derivative Fair Value		0
Liability Derivative Fair Value	0	0
Fair Value, Measurements, Recurring | Derivatives not designated as hedging instruments | Interest rate swaps | Loan customer counterparty | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Asset Derivative Fair Value		6,459,000
Liability Derivative Fair Value	13,788,000	1,073,000
Fair Value, Measurements, Recurring | Derivatives not designated as hedging instruments | Interest rate swaps | Loan customer counterparty | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Asset Derivative Fair Value		0
Liability Derivative Fair Value	0	0
Fair Value, Measurements, Recurring | Derivatives not designated as hedging instruments | Interest rate swaps | Financial institution counterparty
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Asset Derivative Fair Value	13,968,000	1,078,000
Liability Derivative Fair Value		6,772,000
Fair Value, Measurements, Recurring | Derivatives not designated as hedging instruments | Interest rate swaps | Financial institution counterparty | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Asset Derivative Fair Value	0	0
Liability Derivative Fair Value		0
Fair Value, Measurements, Recurring | Derivatives not designated as hedging instruments | Interest rate swaps | Financial institution counterparty | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Asset Derivative Fair Value	13,968,000	1,078,000
Liability Derivative Fair Value		6,772,000
Fair Value, Measurements, Recurring | Derivatives not designated as hedging instruments | Interest rate swaps | Financial institution counterparty | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Asset Derivative Fair Value	0	0
Liability Derivative Fair Value		0
Fair Value, Measurements, Recurring | Derivatives designated as hedging instruments | Interest rate swaps
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Liability Derivative Fair Value	11,283,000	1,158,000
Fair Value, Measurements, Recurring | Derivatives designated as hedging instruments | Interest rate swaps | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Liability Derivative Fair Value	0	0
Fair Value, Measurements, Recurring | Derivatives designated as hedging instruments | Interest rate swaps | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Liability Derivative Fair Value	11,283,000	1,158,000
Fair Value, Measurements, Recurring | Derivatives designated as hedging instruments | Interest rate swaps | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Liability Derivative Fair Value	0	0
U.S. treasuries | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	239,410,000	174,996,000
U.S. treasuries | Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	0	0
U.S. treasuries | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	239,410,000	174,996,000
U.S. treasuries | Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	0	0
Government agency securities | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	384,515,000	444,675,000
Government agency securities | Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	0	0
Government agency securities | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	384,515,000	444,675,000
Government agency securities | Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	0	0
Obligations of state and municipal subdivisions | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	251,231,000	432,760,000
Obligations of state and municipal subdivisions | Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	0	0
Obligations of state and municipal subdivisions | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	251,231,000	432,760,000
Obligations of state and municipal subdivisions | Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	0	0
Corporate bonds | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	37,205,000	34,796,000
Corporate bonds | Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	0	0
Corporate bonds | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	37,205,000	34,796,000
Corporate bonds | Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	0	0
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	778,473,000	918,550,000
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA | Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	0	0
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	778,473,000	918,550,000
Mortgage-backed securities guaranteed by FHLMC, FNMA and GNMA | Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	0	0
Other securities | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	950,000	950,000
Other securities | Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	0	0
Other securities | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	950,000	950,000
Other securities | Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	$ 0	$ 0

Fair Value Measurements - Ass_2

Fair Value Measurements - Assets and Liabilities at Fair Value on Nonrecurring Basis (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Individually evaluated loans	$ 34,473	$ 64,944
Fair Value, Measurements, Nonrecurring
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Individually evaluated loans	8,527	11,204
Other real estate owned	23,900	0
Fair Value, Measurements, Nonrecurring | Individually evaluated loans
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Period Ended Total (Gains) Losses	3,505	3,526
Fair Value, Measurements, Nonrecurring | Other real estate owned
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Period Ended Total (Gains) Losses	3,548
Fair Value, Measurements, Nonrecurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Individually evaluated loans	0	0
Other real estate owned	0
Fair Value, Measurements, Nonrecurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Individually evaluated loans	0	0
Other real estate owned	0
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Individually evaluated loans	8,527	$ 11,204
Other real estate owned	$ 23,900

Fair Value Measurements - Narra

Fair Value Measurements - Narrative (Details)	Dec. 31, 2022 Rate
Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Selling and closing costs for loans as a percentage of appraised value	5%
Selling and closing costs for other real estate owned as a percentage of appraised value	5%
Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Selling and closing costs for loans as a percentage of appraised value	8%
Selling and closing costs for other real estate owned as a percentage of appraised value	8%

Fair Value Measurements - Carry

Fair Value Measurements - Carrying Amount and Estimated Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Financial assets:
Investment securities held to maturity	$ 162,239
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	3,315,544	$ 2,800,043
Commitments to extend credit
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	3,291,409	2,770,036
Standby letters of credit
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	24,135	30,007
Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial assets:
Cash and cash equivalents	654,322	2,608,444
Certificates of deposit held in other banks	0	0
Investment securities held to maturity	0
Loans held for sale, at cost	0	0
Loans, net	0	0
FHLB of Dallas stock and other restricted stock	0	0
Accrued interest receivable	0	0
Financial liabilities:
Deposits	0	0
Accrued interest payable	0	0
FHLB advances	0	0
Other borrowings	0	0
Junior subordinated debentures	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Commitments to extend credit
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Standby letters of credit
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	0	0
Significant Other Observable Inputs (Level 2)
Financial assets:
Cash and cash equivalents	0	0
Certificates of deposit held in other banks	486	3,246
Investment securities held to maturity	162,239
Loans held for sale, at cost	710	3,982
Loans, net	0	0
FHLB of Dallas stock and other restricted stock	23,436	21,573
Accrued interest receivable	59,214	49,636
Financial liabilities:
Deposits	15,063,025	15,553,645
Accrued interest payable	9,604	5,301
FHLB advances	246,519	128,555
Other borrowings	258,800	303,250
Junior subordinated debentures	53,969	45,501
Significant Other Observable Inputs (Level 2) | Commitments to extend credit
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	0	0
Significant Other Observable Inputs (Level 2) | Standby letters of credit
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	0	0
Significant Unobservable Inputs (Level 3)
Financial assets:
Cash and cash equivalents	0	0
Certificates of deposit held in other banks	0	0
Investment securities held to maturity	0
Loans held for sale, at cost	0	0
Loans, net	13,450,582	12,415,366
FHLB of Dallas stock and other restricted stock	0	0
Accrued interest receivable	0	0
Financial liabilities:
Deposits	0	0
Accrued interest payable	0	0
FHLB advances	0	0
Other borrowings	0	0
Junior subordinated debentures	0	0
Significant Unobservable Inputs (Level 3) | Commitments to extend credit
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	0	0
Significant Unobservable Inputs (Level 3) | Standby letters of credit
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	0	0
Carrying Amount
Financial assets:
Cash and cash equivalents	654,322	2,608,444
Certificates of deposit held in other banks	496	3,245
Investment securities held to maturity	207,059
Loans held for sale, at cost	698	3,875
Loans, net	13,760,576	12,290,740
FHLB of Dallas stock and other restricted stock	23,436	21,573
Accrued interest receivable	59,214	49,636
Financial liabilities:
Deposits	15,121,417	15,553,908
Accrued interest payable	9,604	5,301
FHLB advances	300,000	150,000
Other borrowings	267,066	283,371
Junior subordinated debentures	54,419	54,221
Carrying Amount | Commitments to extend credit
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	0	0
Carrying Amount | Standby letters of credit
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	0	0
Estimated Fair Value
Financial assets:
Cash and cash equivalents	654,322	2,608,444
Certificates of deposit held in other banks	486	3,246
Investment securities held to maturity	162,239
Loans held for sale, at cost	710	3,982
Loans, net	13,450,582	12,415,366
FHLB of Dallas stock and other restricted stock	23,436	21,573
Accrued interest receivable	59,214	49,636
Financial liabilities:
Deposits	15,063,025	15,553,645
Accrued interest payable	9,604	5,301
FHLB advances	246,519	128,555
Other borrowings	258,800	303,250
Junior subordinated debentures	53,969	45,501
Estimated Fair Value | Commitments to extend credit
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	0	0
Estimated Fair Value | Standby letters of credit
Off-balance sheet assets (liabilities):
Financial instruments with off-balance sheet risk	$ 0	$ 0

Derivative Financial Instrume_3

Derivative Financial Instruments - Narrative (Details)	12 Months Ended
	Dec. 31, 2022 USD ($) derivative	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Derivative [Line Items]
Number of Interest Rate Derivatives Instruments Entered Into | derivative	2
Unrealized (losses) gains arising during the period, net of tax	$ (8,624,000)	$ (359,000)	$ 0
Reclassification of amount of losses (gains) recognized into income, net of tax	609,000	(472,000)	$ 0
Cash collateral pledged for derivatives	10,394,000	20,491,000
Securities collateral pledged for derivatives	509,000	3,168,000
Counterparties cash deposits	3,390,000
Interest rate swaps - cash flow hedge | Loan customer counterparty
Derivative [Line Items]
Credit exposure	13,968,000	7,537,000
Interest rate swaps - cash flow hedge | Derivatives designated as hedging instruments
Derivative [Line Items]
Outstanding Notional Balance	100,000,000	$ 100,000,000
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	$ 3,838,000
Risk Participation Agreements Participant Bank
Derivative [Line Items]
Number of risk participation agreements	0
Risk Participation Agreements Lead Bank
Derivative [Line Items]
Number of risk participation agreements	1
Credit risk participation	$ 9,082,000

Derivative Financial Instrume_4

Derivative Financial Instruments - Notional Balances and Fair Values of Outstanding Positions (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Derivatives not designated as hedging instruments | Interest rate lock commitments
Derivative [Line Items]
Outstanding Notional Balance	$ 15,476	$ 34,064
Asset Derivative Fair Value	294	1,029
Liability Derivative Fair Value	6	4
Derivatives not designated as hedging instruments | Forward mortgage-backed securities trades
Derivative [Line Items]
Outstanding Notional Balance	18,500	30,500
Asset Derivative Fair Value	98	27
Liability Derivative Fair Value	11	21
Derivatives not designated as hedging instruments | Interest rate swaps | Commercial loan interest rate swaps: | Loan customer counterparty
Derivative [Line Items]
Outstanding Notional Balance	183,183	254,935
Asset Derivative Fair Value	0	6,459
Liability Derivative Fair Value	13,788	1,073
Derivatives not designated as hedging instruments | Interest rate swaps | Commercial loan interest rate swaps: | Financial institution counterparty
Derivative [Line Items]
Outstanding Notional Balance	183,183	254,935
Asset Derivative Fair Value	13,968	1,078
Liability Derivative Fair Value	0	6,772
Derivatives designated as hedging instruments | Interest rate swaps
Derivative [Line Items]
Outstanding Notional Balance	100,000	100,000
Asset Derivative Fair Value	0	0
Liability Derivative Fair Value	$ 11,283	$ 1,158

Derivative Financial Instrume_5

Derivative Financial Instruments Derivative Financial Instruments - Schedule of Weighted Average Interest Rate Received and Paid (Details) - Derivatives not designated as hedging instruments - Commercial loan interest rate swaps: - Loan customer counterparty - Interest rate swaps	Dec. 31, 2022	Dec. 31, 2021
Interest Rate Received
Derivative [Line Items]
Derivative Weighted Average Fixed Interest Rate (Received)	4.12%	4.12%
Interest Rate Paid
Derivative [Line Items]
Derivative Weighted Average Variable Interest Rate (Paid)	6.72%	2.40%

Derivative Financial Instrume_6

Derivative Financial Instruments - Income (Loss) on Derivatives (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Interest rate swaps - cash flow hedge | Derivatives designated as hedging instruments
Derivative [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ (791)	$ 584	$ 0
Interest rate lock commitments | Derivatives not designated as hedging instruments
Derivative [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(737)	(2,490)	2,668
Forward mortgage-backed securities trades | Derivatives not designated as hedging instruments
Derivative [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ 81	$ 574	$ (505)

Stock Awards - Additional Infor

Stock Awards - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	May 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	$ 10,856,000	$ 8,984,000	$ 8,450,000
Estimated future compensation expense	$ 11,659,000
Period for recognition	2 years 3 months 10 days
Fair value of common stock awards vested	$ 13,795,000	12,651,000	5,602,000
Stock based compensation expense	$ 13,697,000	$ 10,691,000	8,450,000
Restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants (shares)	149,160	115,463
Excess tax expense (benefit) on vested restricted stock	$ (703,000)	$ (691,000)	243,000
Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants (shares)	25,742	25,198
Period for recognition	1 year 11 months 26 days
Stock based compensation expense	$ 2,841,000	$ 1,707,000	$ 0
Unrecognized compensation expense	2,887,000
Maximum | Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense	$ 6,605,000
2013 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants (shares)	0
2022 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for future issuance (shares)				1,500,000
Remaining available for grant for future awards (shares)	1,459,078
2022 Equity Incentive Plan | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock vesting period	1 year
2022 Equity Incentive Plan | Minimum | Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock vesting period	3 years
Stock based compensation, award vesting percentage	0%
2022 Equity Incentive Plan | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock vesting period	5 years
2022 Equity Incentive Plan | Maximum | Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock vesting period	4 years
Stock based compensation, award vesting percentage	150%

Stock Awards - Nonvested Restri

Stock Awards - Nonvested Restricted Stock Awards Activity (Details) - Restricted stock - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Number of Shares
Nonvested shares, beginning balance (shares)	363,551	468,800
Granted during the period (shares)	149,160	115,463
Vested during the period (shares)	(193,303)	(185,447)
Forfeited during the period (shares)	(10,393)	(35,265)
Nonvested shares, ending balance (shares)	309,015	363,551
Weighted Average Grant Date Fair Value
Nonvested shares, beginning balance (usd per share)	$ 53.14	$ 49.01
Granted during the period (usd per share)	69.80	66.10
Vested during the period (usd per share)	54.61	51.18
Forfeited during the period (use per share)	57.40	50.23
Nonvested shares, ending balance (usd per share)	$ 60.12	$ 53.14

Stock Awards - Future Vesting S

Stock Awards - Future Vesting Schedule of Nonvested Shares (Detail)	Dec. 31, 2022 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested shares	309,015
First year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested shares	156,588
Second year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested shares	97,066
Third year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested shares	42,154
Fourth year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested shares	13,207

Stock Awards - Schedule of Nonv

Stock Awards - Schedule of Nonvested Restricted Stock Awards (Details) - Performance stock units - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Number of Shares
Nonvested shares, beginning balance (shares)	114,498	89,300
Granted during the period (shares)	25,742	25,198
Nonvested shares, ending balance (shares)	140,240	114,498
Weighted Average Grant Date Fair Value
Nonvested shares, beginning balance (usd per share)	$ 43.93	$ 38.29
Granted during the period (usd per share)	72.65	63.92
Nonvested shares, ending balance (usd per share)	$ 49.20	$ 43.93

Regulatory Matters - Actual Cap

Regulatory Matters - Actual Capital Amounts and Ratios (Details) $ in Thousands	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Consolidated
Total capital to risk weighted assets:
Actual Amount	$ 1,936,363	$ 1,916,163
Actual Ratio (percent)	0.1235	0.1367
Minimum capital required plus capital conservation buffer amount	$ 1,645,772	$ 1,471,510
Minimum capital required plus capital conservation buffer (percent)	0.1050	0.1050
Required to be considered well capitalized amount	$ 1,567,402	$ 1,401,438
Required to be considered well capitalized (percent)	0.1000	0.1000
Tier 1 capital to risk weighted assets:
Tier One Risk Based Capital	$ 1,637,191	$ 1,614,372
Actual Ratio (percent)	0.1045	0.1152
Minimum capital required plus capital conservation buffer amount	$ 1,332,291	$ 1,191,223
Minimum capital required plus capital conservation buffer (percent)	0.0850	0.0850
Required to be considered well capitalized amount	$ 940,441	$ 840,863
Required to be considered well capitalized (percent)	0.0600	0.0600
Common equity tier 1 to risk weighted assets:
Actual amount	$ 1,581,591	$ 1,558,772
Actual ratio (percent)	0.1009	0.1112
Minimum capital required plus capital conservation buffer amount	$ 1,097,181	$ 981,007
Minimum capital required plus capital conservation buffer (percent)	0.0700	0.0700
Tier 1 capital to average assets:
Actual Amount	$ 1,637,191	$ 1,614,372
Actual Ratio (percent)	0.0949	0.0880
Minimum capital required plus capital conservation buffer amount	$ 690,309	$ 733,954
Minimum capital required plus capital conservation buffer (percent)	0.0400	0.0400
Bank
Total capital to risk weighted assets:
Actual Amount	$ 2,013,874	$ 1,983,530
Actual Ratio (percent)	0.1285	0.1416
Minimum capital required plus capital conservation buffer amount	$ 1,645,236	$ 1,471,036
Minimum capital required plus capital conservation buffer (percent)	0.1050	0.1050
Required to be considered well capitalized amount	$ 1,566,891	$ 1,400,987
Required to be considered well capitalized (percent)	0.1000	0.1000
Tier 1 capital to risk weighted assets:
Tier One Risk Based Capital	$ 1,896,702	$ 1,885,739
Actual Ratio (percent)	0.1210	0.1346
Minimum capital required plus capital conservation buffer amount	$ 1,331,858	$ 1,190,839
Minimum capital required plus capital conservation buffer (percent)	0.0850	0.0850
Required to be considered well capitalized amount	$ 1,253,513	$ 1,120,790
Required to be considered well capitalized (percent)	0.0800	0.0800
Common equity tier 1 to risk weighted assets:
Actual amount	$ 1,896,702	$ 1,885,739
Actual ratio (percent)	0.1210	0.1346
Minimum capital required plus capital conservation buffer amount	$ 1,096,824	$ 980,691
Minimum capital required plus capital conservation buffer (percent)	0.0700	0.0700
Required to be considered well capitalized amount	$ 1,018,479	$ 910,642
Required to be considered well capitalized (percent)	0.0650	0.0650
Tier 1 capital to average assets:
Actual Amount	$ 1,896,702	$ 1,885,739
Actual Ratio (percent)	0.1099	0.1028
Minimum capital required plus capital conservation buffer amount	$ 690,130	$ 733,785
Minimum capital required plus capital conservation buffer (percent)	0.0400	0.0400
Required to be considered well capitalized amount	$ 862,663	$ 917,231
Required to be considered well capitalized (percent)	0.0500	0.0500

Regulatory Matters - Additional

Regulatory Matters - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Regulatory Assets [Line Items]
Common stock repurchased	$ 119,746,000	$ 32,132,000	$ 5,819,000
Common stock purchased to settle employee tax withholding related to vesting of stock awards (shares)	53,088	41,970
Common stock purchased to settle employee tax withholding related to vesting of stock awards	$ 3,780,000	$ 2,891,000
October 2020 Share Repurchase Program
Regulatory Assets [Line Items]
Common stock repurchased (shares)		419,098
Common stock repurchased		$ 29,241,000
2022 Share Repurchase Program
Regulatory Assets [Line Items]
Stock repurchase authorized amount		$ 160,000,000
Common stock repurchased (shares)	1,651,236
Common stock repurchased	$ 115,966,000

Parent Company Only Financial_3

Parent Company Only Financial Statements - Balance Sheet (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Assets
Cash and cash equivalents	$ 654,322	$ 2,608,444
Other assets	154,026	130,446
Total assets	18,258,414	18,732,648
Liabilities and Stockholders’ Equity
Other borrowings	267,066	283,371
Junior subordinated debentures	54,419	54,221
Other liabilities	130,129	114,498
Total liabilities	15,873,031	16,155,998
Stockholders’ equity:
Preferred stock	0	0
Common stock	412	428
Additional paid-in capital	1,959,193	1,945,497
Retained earnings	638,354	625,484
Accumulated other comprehensive (loss) income	(212,576)	5,241
Total stockholders’ equity	2,385,383	2,576,650	$ 2,515,371	$ 2,339,773
Total liabilities and stockholders’ equity	18,258,414	18,732,648
Parent
Assets
Cash and cash equivalents	5,660	10,747	$ 5,482	$ 8,277
Investment in subsidiaries	2,701,273	2,904,395
Investment in trusts	1,724	1,724
Other assets	3,511	3,039
Total assets	2,712,168	2,919,905
Liabilities and Stockholders’ Equity
Other borrowings	267,066	283,371
Junior subordinated debentures	54,419	54,221
Other liabilities	5,300	5,663
Total liabilities	326,785	343,255
Stockholders’ equity:
Preferred stock	0	0
Common stock	412	428
Additional paid-in capital	1,959,193	1,945,497
Retained earnings	638,354	625,484
Accumulated other comprehensive (loss) income	(212,576)	5,241
Total stockholders’ equity	2,385,383	2,576,650
Total liabilities and stockholders’ equity	$ 2,712,168	$ 2,919,905

Parent Company Only Financial_4

Parent Company Only Financial Statements - Statement of Income (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Interest expense:
Interest on other borrowings	$ 14,451	$ 15,247	$ 12,462
Interest on junior subordinated debentures	2,713	1,756	2,162
Total interest expense	96,809	63,240	95,060
Noninterest income:
Other	15,469	12,987	19,216
Total noninterest income	51,466	66,517	85,063
Noninterest expense:
Salaries and employee benefits	212,087	180,336	157,540
Professional fees	15,571	15,530	12,630
Acquisition expense, including legal	0	0	16,225
Other	41,845	35,151	34,146
Total noninterest expense	358,889	313,606	306,134
Income tax benefit	(50,004)	(57,483)	(51,173)
Net income	196,291	224,750	201,209
Parent
Interest expense:
Interest on other borrowings	14,450	15,247	12,446
Interest on junior subordinated debentures	2,713	1,756	2,162
Total interest expense	17,163	17,003	14,608
Noninterest income:
Dividends from subsidiaries	208,665	134,547	83,314
Other	0	61	0
Total noninterest income	208,665	134,608	83,314
Noninterest expense:
Salaries and employee benefits	14,886	10,546	8,346
Professional fees	736	126	202
Acquisition expense, including legal	0	0	16,225
Other	2,738	2,510	2,424
Total noninterest expense	18,360	13,182	27,197
Income before income tax benefit and equity in undistributed income of subsidiaries	173,142	104,423	41,509
Income tax benefit	8,454	7,131	9,410
Income before equity in undistributed income of subsidiaries	181,596	111,554	50,919
Equity in undistributed income of subsidiaries	14,695	113,196	150,290
Net income	$ 196,291	$ 224,750	$ 201,209

Parent Company Only Financial_5

Parent Company Only Financial Statements - Statement of Cash Flows (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Net income	$ 196,291	$ 224,750	$ 201,209
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of discount and origination costs on borrowings	893	894	720
Stock based compensation expense	13,697	10,691	8,450
Excess tax (benefit) expense on restricted stock vested	(703)	(691)	243
Deferred tax expense (benefit)	5,168	5,353	(1,633)
Net change in other assets	(24,059)	14,293	(35,025)
Net change in other liabilities	(24,434)	(23,356)	(7,833)
Net cash provided by operating activities	217,234	277,433	154,295
Cash flows from investing activities:
Net cash used in investing activities	(1,688,627)	(294,464)	(1,471,388)
Cash flows from financing activities:
Proceeds from other borrowings	111,000	75,000	156,489
Repayments of other borrowings	(128,000)	(104,500)	(47,086)
Repurchase of common stock	(119,746)	(32,132)	(5,819)
Dividends paid	(63,492)	(56,861)	(45,265)
Net cash (used in) provided by financing activities	(482,729)	811,488	2,565,910
Net change in cash and cash equivalents	(1,954,122)	794,457	1,248,817
Cash and cash equivalents at beginning of year	2,608,444
Cash and cash equivalents at end of year	654,322	2,608,444
Parent
Cash flows from operating activities:
Net income	196,291	224,750	201,209
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in undistributed net income of subsidiaries	(14,695)	(113,196)	(150,290)
Amortization of discount and origination costs on borrowings	893	894	720
Stock based compensation expense	13,697	10,691	8,450
Excess tax (benefit) expense on restricted stock vested	(703)	(691)	243
Deferred tax expense (benefit)	(579)	(210)	96
Net change in other assets	107	1,020	(590)
Net change in other liabilities	140	500	(952)
Net cash provided by operating activities	195,151	123,758	58,886
Cash flows from investing activities:
Capital investment in subsidiaries	0	0	(120,000)
Net cash used in investing activities	0	0	(120,000)
Cash flows from financing activities:
Proceeds from other borrowings	111,000	75,000	148,653
Repayments of other borrowings	(128,000)	(104,500)	(39,250)
Repurchase of common stock	(119,746)	(32,132)	(5,819)
Dividends paid	(63,492)	(56,861)	(45,265)
Net cash (used in) provided by financing activities	(200,238)	(118,493)	58,319
Net change in cash and cash equivalents	(5,087)	5,265	(2,795)
Cash and cash equivalents at beginning of year	10,747	5,482	8,277
Cash and cash equivalents at end of year	$ 5,660	$ 10,747	$ 5,482

Subsequent Events - Narrative (

Subsequent Events - Narrative (Details) - Subsequent event - USD ($)				1 Months Ended
	Feb. 21, 2023	Feb. 16, 2023	Jan. 19, 2023	Feb. 21, 2023
Subsequent Event [Line Items]
Dividends declared (in usd per share)			$ 0.38
Dividends paid		$ 15,644,000
2023 Share Repurchase Program
Subsequent Event [Line Items]
Stock repurchase authorized amount			$ 125,000,000
Common stock repurchased (shares)				0
Revolving line of credit | Line of Credit
Subsequent Event [Line Items]
Line of credit, maximum capacity		$ 100,000,000
Borrowings against line of credit	$ 0