BancFirst (BANF) 10-K 24 Feb 23 2022 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2022	Jan. 31, 2023	Jun. 30, 2022
Document And Entity Information [Line Items]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2022
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY
Trading Symbol	BANF
Entity Registrant Name	BANCFIRST CORPORATION
Entity Central Index Key	0000760498
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	false
Entity Shell Company	false
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Title of 12(b) Security	Common Stock, $1.00 Par Value Per Share
Security Exchange Name	NASDAQ
Entity File Number	0-14384
Entity Incorporation, State or Country Code	OK
Entity Tax Identification Number	73-1221379
Entity Address, Address Line One	100 N. Broadway Ave.
Entity Address, City or Town	Oklahoma City
Entity Address, State or Province	OK
Entity Address, Postal Zip Code	73102
City Area Code	405
Local Phone Number	270-1086
Document Annual Report	true
Document Transition Report	false
Entity Common Stock, Shares Outstanding		32,891,024
Entity Public Float			$ 1,913,667,565
Documents Incorporated by Reference	Portions of the Proxy Statement for the 2023 Annual Meeting of Stockholders of the registrant (the “2023 Proxy Statement”) to be filed pursuant to Regulation 14A are incorporated by reference into Part III of this report.
Auditor Name	FORVIS, LLP
Auditor Location	Oklahoma City, OK
Auditor Firm ID	686

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
ASSETS
Cash and due from banks	$ 259,049	$ 228,819
Interest-bearing deposits with banks	2,909,861	1,821,203
Federal funds sold	2,850	800
Debt securities held for investment (fair value: $2,383 and $2,978, respectively)	2,383	2,977
Debt securities available for sale	1,538,221	531,523
Loans held for sale	6,232	24,776
Loans held for investment (net of unearned interest)	6,943,563	6,169,442
Allowance for credit losses	(92,728)	(83,936)
Loans, net of allowance for credit losses	6,850,835	6,085,506
Premises and equipment, net	278,088	269,047
Other real estate owned	36,756	39,475
Intangible assets, net	19,983	17,566
Goodwill	182,055	149,922
Accrued interest receivable and other assets	301,550	233,998
Total assets	12,387,863	9,405,612
Deposits:
Noninterest-bearing	4,944,730	3,775,387
Interest-bearing	6,029,498	4,316,527
Total deposits	10,974,228	8,091,914
Short-term borrowings	300	0
Accrued interest payable and other liabilities	76,455	55,977
Subordinated debt	86,044	85,987
Total liabilities	11,137,027	8,233,878
Commitments and contingent liabilities (Note 19)
Stockholders' equity:
Common stock, $1.00 par, 40,000,000 shares authorized; shares issued and outstanding: 32,875,560 and 32,603,118, respectively	32,876	32,603
Capital surplus	169,231	159,914
Retained earnings	1,120,292	977,067
Accumulated other comprehensive (loss) income, net of income tax benefit/(expense) of $22,107 and $(684), respectively	(71,563)	2,150
Total stockholders' equity	1,250,836	1,171,734
Total liabilities and stockholders' equity	12,387,863	9,405,612
Senior Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value
Cumulative Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Securities, fair value	$ 2,383	$ 2,978
Common stock, par value	$ 1	$ 1
Common stock, shares authorized	40,000,000	40,000,000
Common stock, shares issued	32,875,560	32,603,118
Common stock, shares outstanding	32,875,560	32,603,118
Accumulated other comprehensive (loss) income, net of tax benefit/(expense)	$ 22,107	$ (684)
Senior Preferred Stock [Member]
Preferred stock, par value	$ 1	$ 1
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Cumulative Preferred Stock [Member]
Preferred stock, par value	$ 5	$ 5
Preferred stock, shares authorized	900,000	900,000
Preferred stock, shares issued	0	0

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
INTEREST INCOME
Loans, including fees	$ 336,340	$ 316,124	$ 311,987
Debt securities:
Taxable	24,456	6,327	8,591
Tax-exempt	93	204	487
Federal funds sold	83
Interest-bearing deposits with banks	58,848	4,366	6,049
Total interest income	419,820	327,021	327,114
INTEREST EXPENSE
Deposits	41,965	8,232	18,472
Short-term borrowings	60	2	8
Subordinated debt	4,122	3,130	1,966
Total interest expense	46,147	11,364	20,446
Net interest income	373,673	315,657	306,668
Provision for (benefit from) credit losses	10,076	(8,690)	62,648
Net interest income after provision for (benefit from) credit losses	363,597	324,347	244,020
NONINTEREST INCOME
Securities transactions (includes accumulated other comprehensive income reclassifications of $1,536, $0 and $0, respectively)	(1,833)	1,047	(389)
Income from sales of loans	4,548	7,282	6,067
Insurance commissions	26,883	23,745	20,996
Cash management	19,326	12,313	15,411
Gain on sale of other assets	448	2,762	130
Other	31,973	26,546	7,439
Total noninterest income	183,747	170,032	137,222
NONINTEREST EXPENSE
Salaries and employee benefits	184,976	166,723	164,727
Occupancy, net	19,326	18,483	16,421
Depreciation	18,600	16,925	14,609
Amortization of intangible assets	3,448	3,116	3,815
Data processing services	7,584	6,735	6,753
Net expense/(income) from other real estate owned	9,911	9,089	(1,531)
Marketing and business promotion	8,074	7,403	6,996
Deposit insurance	4,735	3,456	2,081
Other	53,258	54,051	43,859
Total noninterest expense	309,912	285,981	257,730
Income before taxes	237,432	208,398	123,512
Income tax expense	44,332	40,768	23,926
Net income	$ 193,100	$ 167,630	$ 99,586
NET INCOME PER COMMON SHARE
Basic	$ 5.89	$ 5.12	$ 3.05
Diluted	$ 5.77	$ 5.03	$ 3
OTHER COMPREHENSIVE (LOSS)/GAIN
Unrealized (losses)/gains on securities, net of tax benefit/(expense) of $23,160, $1,829 and $(1,326), respectively	$ (74,880)	$ (5,280)	$ 3,976
Reclassification adjustment for gains included in net income, net of tax expense of $(369), $0 and $0, respectively	1,167
Other comprehensive (loss)/gain, net of tax benefit/(expense) of $22,791, $1,829 and $(1,326), respectively	(73,713)	(5,280)	3,976
Comprehensive income	119,387	162,350	103,562
Trust Revenue [Member]
NONINTEREST INCOME
Revenue	15,645	12,912	13,130
Service Charges on Deposits [Member]
NONINTEREST INCOME
Revenue	$ 86,757	$ 83,425	$ 74,438

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Statement [Abstract]
Securities transactions accumulated other comprehensive income reclassifications	$ 1,536	$ 0	$ 0
Unrealized (losses)/gains on securities, net of tax benefit/(expense)	23,160	1,829	(1,326)
Reclassification adjustment for gains included in net income, net of tax expense	(369)	0	0
Other comprehensive (loss)/gain, net of tax benefit/(expense)	$ 22,791	$ 1,829	$ (1,326)

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	CUMULATIVE EFFECT, PERIOD OF ADOPTION, ADJUSTMENT [Member]	Common Stock [Member]	CAPITAL SURPLUS [Member]	RETAINED EARNINGS [Member]	RETAINED EARNINGS [Member] CUMULATIVE EFFECT, PERIOD OF ADOPTION, ADJUSTMENT [Member]	ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)
Balance at beginning of period, Shares at Dec. 31, 2019			32,694,268
Balance at beginning of period at Dec. 31, 2019			$ 32,694	$ 153,353	$ 815,488	$ 2,270	$ 3,454
Accounting Standards Update Extensible List		ASC 326 [Member]			ASC 326 [Member]
Shares issued for stock options, Shares			84,868
Shares issued for stock options, Value			$ 85	1,705
Net income	$ 99,586				$ 99,586
Net change							3,976
Dividends on common stock					(43,144)
Stock-based compensation arrangements				1,516
Shares acquired and canceled, Shares			(59,284)
Shares acquired and canceled, Value			$ (59)		(3,039)
Balance at end of period, Shares at Dec. 31, 2020	32,719,852		32,719,852
Balance at end of period at Dec. 31, 2020	$ 1,067,885		$ 32,720	156,574	871,161		7,430
Shares issued for stock options, Shares			95,562
Shares issued for stock options, Value			$ 95	2,165
Net income	$ 167,630				167,630
Net change							(5,280)
Dividends on common stock					(45,752)
Net cash settlement of options				(958)	(4,521)
Stock-based compensation arrangements				2,133
Shares acquired and canceled, Shares			(212,296)
Shares acquired and canceled, Value			$ (212)		(11,451)
Balance at end of period, Shares at Dec. 31, 2021	32,603,118		32,603,118
Balance at end of period at Dec. 31, 2021	$ 1,171,734		$ 32,603	159,914	977,067		2,150
Shares issued for stock options, Shares			272,442
Shares issued for stock options, Value			$ 273	7,376
Net income	$ 193,100				193,100
Net change							(73,713)
Dividends on common stock					(49,875)
Stock-based compensation arrangements				1,941
Balance at end of period, Shares at Dec. 31, 2022	32,875,560		32,875,560
Balance at end of period at Dec. 31, 2022	$ 1,250,836		$ 32,876	$ 169,231	$ 1,120,292		$ (71,563)

Consolidated Statements of St_2

Consolidated Statements of Stockholders' Equity (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cumulative effect of change in accounting principle tax			$ 925
RETAINED EARNINGS [Member]
Dividend on common stock	$ 1.52	$ 1.40	$ 1.32

Consolidated Statements of Cash

Consolidated Statements of Cash Flow - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 193,100,000	$ 167,630,000	$ 99,586,000
Adjustments to reconcile to net cash provided by operating activities:
Provision for (benefit from) credit losses	10,076,000	(8,690,000)	62,648,000
Depreciation and amortization	22,048,000	20,041,000	18,424,000
Net amortization of securities premiums and discounts	2,619,000	4,409,000	(94,000)
Realized securities losses (gains)	1,833,000	(1,047,000)	389,000
Gain on sales of loans	(4,548,000)	(7,282,000)	(6,067,000)
Cash receipts from the sale of loans originated for sale	246,499,000	369,301,000	415,589,000
Cash disbursements for loans originated for sale	(223,407,000)	(354,674,000)	(430,653,000)
Deferred income tax provision (benefit)	322,000	7,044,000	(9,491,000)
Gain on sale of other assets	(4,682,000)	(3,379,000)	(2,345,000)
(Increase)/decrease in interest receivable	(16,914,000)	4,214,000	(325,000)
Increase/(decrease) in interest payable	3,192,000	(617,000)	(1,641,000)
Stock-based compensation arrangements	1,941,000	2,133,000	1,516,000
Excess tax benefit from stock-based compensation arrangements	(3,325,000)	(1,932,000)	(500,000)
Other, net	(2,482,000)	6,783,000	7,818,000
Net cash provided by operating activities	226,272,000	203,934,000	154,854,000
INVESTING ACTIVITIES
Net cash received from acquisitions, net of cash paid	121,099,000	12,599,000	18,397,000
Net cash paid from sale of assets and liabilities, net of cash received		(13,733,000)
Net decrease in federal funds sold	563,000	14,200,000	1,000,000
Purchases of held for investment debt securities		(845,000)	(1,395,000)
Purchases of available for sale debt securities	(1,881,784,000)	(462,304,000)	(605,069,000)
Proceeds from maturities, calls and paydowns of held for investment debt securities	74,000	831,000	561,000
Proceeds from maturities, calls and paydowns of available for sale debt securities	550,018,000	506,737,000	547,729,000
Proceeds from sales of available for sale debt securities	222,474,000	0	0
Purchase of equity securities	(4,309,000)	(904,000)	(811,000)
Proceeds from paydowns and sales of equity securities	1,620,000	1,459,000	445,000
Net change in loans	(521,220,000)	404,393,000	(798,024,000)
Net receipts (payments) on derivative asset contracts	7,294,000	(14,146,000)	(513,000)
Purchases of premises, equipment and computer software	(19,785,000)	(27,251,000)	(66,446,000)
Purchase of tax credits	(9,706,000)	(7,456,000)	(2,200,000)
Other, net	14,494,000	9,305,000	7,820,000
Net cash (used in) provided by investing activities	(1,519,168,000)	422,885,000	(898,506,000)
FINANCING ACTIVITIES
Net change in deposits	2,452,297,000	(191,737,000)	536,063,000
Net change in short-term borrowings	300,000	(1,100,000)
Proceeds from long-term borrowings			3,000,000
Paydown of long-term borrowings			(3,000,000)
Issuance of common stock in connection with stock options, net	7,649,000	2,260,000	1,790,000
Common stock acquired		(11,663,000)	(3,098,000)
Proceeds from issuance of subordinated notes, net of debt issuance costs		59,150,000
Net cash settlement of options		(5,479,000)
Cash dividends paid	(48,462,000)	(45,140,000)	(42,472,000)
Net cash provided by (used in) financing activities	2,411,784,000	(193,709,000)	492,283,000
Net increase/(decrease) in cash, due from banks and interest-bearing deposits	1,118,888,000	433,110,000	(251,369,000)
Cash, due from banks and interest-bearing deposits at the beginning of the period	2,050,022,000	1,616,912,000	1,868,281,000
Cash, due from banks and interest-bearing deposits at the end of the period	3,168,910,000	2,050,022,000	1,616,912,000
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Cash paid during the period for interest	42,930,000	11,993,000	22,056,000
Cash paid during the period for income taxes	34,640,000	30,600,000	26,525,000
Noncash investing and financing activities:
Cash consideration for acquisitions	77,685,000	21,000,000	2,861,000
Fair value of assets acquired in acquisitions	511,595,000	283,711,000	47,838,000
Liabilities assumed in acquisitions	433,911,000	257,915,000	45,040,000
Unpaid common stock dividends declared	$ 13,150,000	$ 11,737,000	$ 11,125,000

Description of Business and Sum

Description of Business and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2022
Accounting Policies [Abstract]
Description of Business and Summary of Significant Accounting Policies	(1) DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES The accounting and reporting policies of BancFirst Corporation and its subsidiaries (the “Company”) conform to accounting principles generally accepted in the United States of America (U.S. GAAP) and general practice within the banking industry. A summary of the significant accounting policies follows. Nature of Operations BancFirst Corporation is an Oklahoma business corporation and a financial holding company under federal law. It conducts virtually all of its operating activities through its principal wholly-owned subsidiary, BancFirst (“BancFirst”), an Oklahoma state-chartered bank headquartered in Oklahoma City, Oklahoma. The Company also conducts operating activities through its wholly-owned subsidiaries, Pegasus Bank (“Pegasus”), a Texas state-chartered bank headquartered in Dallas, Texas and Worthington Bank ("Worthington"), a Texas state-chartered bank headquartered in Arlington, Texas. BancFirst, Pegasus and Worthington provide a wide range of retail and commercial banking services, including: commercial, real estate, agricultural and consumer lending; depository and funds transfer services; collections; safe deposit boxes; cash management services; and other services tailored for both individual and corporate customers. BancFirst also offers trust services and acts as executor, administrator, trustee, transfer agent and in various other fiduciary capacities. BancFirst provides item processing, research and other correspondent banking services to financial institutions and governmental units. The Company’s wholly-owned subsidiary, BancFirst Insurance Services, Inc., an independent insurance agency, offers a variety of commercial and personal insurance products. In addition, the Company’s wholly-owned subsidiary, Council Oak Partners, LLC, an Oklahoma limited liability company, engages in investing activities. Basis of Presentation The accompanying consolidated financial statements include the accounts of BancFirst Corporation, Council Oak Partners, LLC, BancFirst Insurance Services, Inc., Pegasus, Worthington and BancFirst and its subsidiaries. The principal operating subsidiaries of BancFirst are BFTower, LLC, BFC-PNC LLC, BF Brazito, LLC, and BancFirst Agency, Inc. All significant intercompany accounts and transactions have been eliminated. Assets held in a fiduciary or agency capacity are not assets of the Company and, accordingly, are not included in the consolidated financial statements. Certain amounts from 2021 and 2020 have been reclassified to conform to the 2022 presentation. These reclassifications were not material to the Company’s consolidated financial statements. Use of Estimates in the Preparation of Financial Statements The preparation of financial statements in conformity with U.S. GAAP inherently involves the use of estimates and assumptions that affect the amounts reported in the financial statements and the related disclosures. These estimates relate principally to the determination of the allowance for credit losses, income taxes, the fair value of financial instruments and the valuation of assets and liabilities acquired in a business combination, including identifiable intangible assets. Such estimates and assumptions may change over time and actual amounts realized may differ from those reported. Securities The Company invests in debt securities. Any sales of debt securities are for the purpose of executing the Company’s asset/liability management strategy, eliminating a perceived credit risk in a specific security or providing liquidity. Debt securities that are being held for indefinite periods of time, or that may be sold as part of the Company’s asset/liability management strategy, to provide liquidity or for other reasons, are classified as available for sale and are stated at estimated fair value. Unrealized gains or losses on debt securities available for sale are reported as a component of stockholders’ equity, net of income tax. Gains or losses from sales of debt securities are based upon the book values of the specific debt securities sold. Debt securities for which the Company has the intent and ability to hold to maturity are classified as held for investment and are stated at cost, adjusted for amortization of premiums and accretion of discounts computed under the interest method. The Company reviews its portfolio of debt securities in an unrealized loss position at least quarterly. 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, the Company considers, among other things, the performance of any underlying collateral and adverse conditions specifically related to the security. The Company does not consider the unrealized position of its debt securities to be the result of credit factors, because the decline in fair value is attributable to changes in interest rates and illiquidity, and not credit quality, and the Company does not have the intent to sell these securities and it is likely that it will not be required to sell the securities before their anticipated recovery. Therefore, the Company has not recorded an allowance for credit losses against its debt securities portfolio, as the credit risk is not material. The Company does not engage in securities trading activities. The Company invests in equity securities without readily determinable fair values and utilizes Level 3 inputs. These securities are reported at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer. The realized and unrealized gains and losses are reported as securities transactions in the noninterest income section of the consolidated statements of comprehensive income. Equity securities are reported in other assets on the consolidated balance sheet. The Company reviews its portfolio of equity securities for impairment at least quarterly. Loans The lending function is governed by written policies and procedures, as determined by senior management and approved by the Board of Directors. The policies and procedures set the standards for lending in each major loan category by collateral type and use of loan proceeds. The objectives of these policies and procedures are to identify profitable markets, determine appropriate risk tolerance levels for each type of loan, establish limits for loan officer approval, set concentration limits, establish loan-to-value thresholds, set repayment terms and loan structure guidelines and adhere to documentation requirements. Interest rate risk is controlled by the use of variable rate provisions, the vast majority of which have a rate floor, limits on fixing rates for longer periods and the use of prepayment penalties. Loans originated within the Company are stated at the principal amount outstanding, net of unearned interest, loan fees and allowance for credit losses. Interest on all performing loans is recognized, on a simple interest basis, based upon the principal amount outstanding. See Note (5) for loan disclosures. Loans that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are reported at amortized cost. Amortized cost is the principal balance outstanding, net of purchase premiums and discounts. The Company has made the accounting policy election to exclude accrued interest receivable on loans from the estimate of credit losses because it writes off uncollectible accrued interest in a timely manner. Interest income is accrued on the unpaid principal balance using the simple-interest method on the daily balances of the principal amounts outstanding. The Company writes off accrued interest once a loan enters non-accrual status. The Company debits interest income for the interest accrued. No interest will be accrued on loans, for which a default of principal or interest has existed for a period of at least 90 days unless the collateral margin or guarantor support are such that full collection of principal and interest are not in doubt and an orderly plan for collection is in process. The Company also suspends interest recognition on any other loan for which it is more likely than not that future contractual payments will not be collected. Interest income on consumer and commercial loans is discontinued and placed on nonaccrual status at the time the loan is 90 days delinquent unless the loan is well secured and in process of collection. Consumer loans are charged off at 180 days past due and commercial loans are charged off to the extent principal or interest is deemed uncollectible. Past-due status is based on the contractual terms of the loan. In all cases, loans are placed on nonaccrual or charged off at an earlier date if collection of principal or interest is considered doubtful. All interest accrued but not received for loans placed on nonaccrual is reversed against interest income. The amount of interest accrued but not received for loans placed on nonaccrual and reversed against interest income was $ 147,000 , $ 83,000 and $ 841,000 million for the years ended December 31, 2022, 2021 and 2020, respectively. Interest received on such loans is accounted for on the cash-basis or cost-recovery method, until qualifying for return to accrual. Under the cost-recovery method, interest income is not recognized until the loan balance is reduced to zero. Under the cash-basis method, interest income is recorded when the payment is received in cash. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured. Troubled debt restructurings are loans on which, due to the borrower’s financial difficulties, the Company has granted a concession that the Company would not otherwise consider for borrowers of similar credit quality. This may include a transfer of real estate or other assets from the borrower, a modification of loan terms, or a combination of the two. Modifications of terms that could potentially qualify as a restructuring include reduction of contractual interest rate, extension of the maturity date at a contractual interest rate lower than the current rate for new debt with similar risk, and a reduction of the face amount of debt or forgiveness of either principal or accrued interest. A loan continues to qualify as restructured until a consistent payment history or change in the borrower’s financial condition has been evidenced, generally for no less than twelve months. If the restructuring agreement specifies an interest rate at the time of the restructuring that is greater than or equal to the rate that the Company is willing to accept for a new extension of credit with comparable risk, then the loan is no longer considered a restructured loan if it is in compliance with the modified terms in calendar years after the year of restructure. Residential real estate loans are made in accordance with underwriting policies and are fully documented. Credit worthiness is assessed based on significant credit characteristics including credit history and residential and employment stability. The Company does not engage in any hybrid loan programs. In addition, the Company does not have any exposure to loans with negative amortization, interest rate carryover or discounting of the initial rates (teaser rates). An updated appraisal of the collateral is obtained when a loan is first identified as a problem loan. Appraisals are reviewed annually and are updated as needed or are updated more frequently if significant changes are believed to have occurred in the collateral or market conditions. Appraisals of other real estate owned are also reviewed and updated consistent with this policy. When a loan deteriorates to the point that the account officer or the Loan Committee concludes it no longer represents a viable asset, it will be charged off. Similarly, any portion of a loan that is deemed to no longer be a viable asset will be charged off. A loan will not be charged off unless such action has been approved by the branch President. Acquired Loans Loans acquired through business combinations are required to be carried at fair value as of the date of the combination. Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction (that is, not a forced liquidation or distressed sale) between market participants at the measurement date. The methodology of allowance for credit loss recorded for these acquired loans depends on whether the acquired loans are purchase credit deteriorated or non-purchase credit deteriorated. An allowance for credit loss for non-purchase credit deteriorated loans is determined and recorded in a manner consistent with originated loans. That is, the allowance for credit loss is calculated based on the loan’s amortized cost basis (i.e., the acquisition date fair value in a business combination) and is established through a charge to provision expense at the acquisition date. An allowance for credit loss for purchase credit deteriorated loans is recorded as an adjustment to the loans, in addition to the fair value amount recorded, as of the acquisition date, and not through provision expense. The acquisition date fair value plus the allowance for credit loss equals the loans new amortized cost basis as of the acquisition date. The difference between the new amortized cost basis and the unpaid principal balance of the loan represents the non-credit purchase discount/premium recorded. The difference between the fair value of loans which do not have specific evidence of deterioration of credit quality since origination and their principal balance is recognized in interest income on a level-yield method over the life of the loans. For loans which it is probable, at acquisition, that the Company will be unable to collect all contractually required payments (as determined by the present value of expected future cash flows), the difference between the undiscounted cash flows expected at acquisition and the investment in the loan, or the “accretable yield,” is recognized in interest income on a level-yield method over the life of the loan. Contractually required payments for interest and principal that exceed the undiscounted cash flows expected at acquisition, or the “nonaccretable difference,” are not recognized as yield adjustments or as loss accruals or valuation allowances. Increases in expected cash flows subsequent to the initial investment are recognized prospectively through adjustment of the yield on the loan over its remaining life. Decreases in expected cash flows are recognized as impairments. Any probable loss due to subsequent credit deterioration of the loans since acquisition is provided for in the allowance for credit losses. Purchased Credit Deteriorated (PCD) Loans The Company has purchased loans, some of which have experienced more than insignificant credit deterioration since origination. An allowance for credit losses is determined using the same methodology as other loans held for investment. The initial allowance for credit losses determined on a collective basis is allocated to individual loans. The sum of the loan’s purchase price and allowance for credit losses becomes its initial amortized cost basis. The difference between the initial amortized cost basis and the par value of the loan is a noncredit discount or premium, which is amortized into interest income over the life of the loan. Subsequent changes to the allowance for credit losses are recorded through provision expense. Loans Held for Sale The Company originates mortgage loans to be sold. At the time of origination, the acquiring bank has already been determined and the terms of the loan, including the interest rate, have already been set by the acquiring bank allowing the Company to originate the loan at fair value. Mortgage loans are generally sold within 30 days of origination. Loans held for sale are carried at the lower of cost or fair value. Gains or losses recognized upon the sale of the loans are determined on a specific identification basis. The Company does not sell residential mortgage loans with recourse other than obligations under standard representations and warranties or for fraud. These obligations relate to loan performance for the life of the loan. The amount of loans repurchased since the inception of the program is not considered to be material, and therefore, no reserve has been required. Allowance for Credit Losses The allowance for credit losses is a valuation account that is deducted from the loans amortized cost basis to present the net amount expected to be collected on the loans. Loans are charged off against the allowance when management believes the uncollectibility of a loan balance is confirmed. Expected recoveries do not exceed the aggregate of amounts previously charged-off and expected to be charged-off. The allowance for credit losses is increased by provisions charged to operating expense and is reduced by net loan charge-offs. The Company considers various factors to monitor the credit risk in the loan portfolio including volume and severity of loan delinquencies, nonaccrual loans, internal grading of loans, historical loan loss experience and economic conditions. Management estimates the allowance balance 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, delinquency level, or term as well as for changes in environmental conditions, such as the political, legal, and regulatory environment, technology and consumer preferences. Historical loss information is also adjusted for reasonable and supportable changes in national and local economic conditions, such as consumer loans 90 days past due and commercial bankruptcies. Economic conditions are forecast as "current conditions" over the forecast period. Forecast models were used to validate credit performance during the forecast period. Beyond the reasonable and supportable forecast, the economic expectation reverts to the historical average, which is determined by the weighted average life of each loan pool. If a loan is individually evaluated a specific allowance is provided, if necessary, so that the loan is reported net, at the fair value of collateral. Interest payments on collateral dependent loans are typically applied to principal unless collectability of the principal amount is reasonably assured, in which case interest is recognized on a cash basis. Loans, or portions thereof, are charged off when deemed uncollectible. The allowance for credit losses is measured on a collective (pool) basis when similar risk characteristics exist. Determining the Contractual Term Expected credit losses are estimated over the contractual term of the loans, 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 at the reporting date that a troubled debt restructuring will be executed with an individual borrower or the extension or renewal options are included in the original or modified contract at the reporting date and are not unconditionally cancellable by the Company. Troubled Debt Restructurings (TDRs) The allowance for credit loss on a TDR is measured using the same method as all other loans held for investment, except when the value of a concession cannot be measured using a method other than the discounted cash flow method. When the value of a concession is measured using the discounted cash flow method, the allowance for credit loss is determined by discounting the expected future cash flows at the original interest rate of the loan. Allowance for Credit Losses on Off-Balance Sheet Credit Exposures The Company estimates expected credit losses over the contractual period in which the Company is exposed to credit risk via a contractual obligation to extend credit, unless that obligation is unconditionally cancellable by the Company. The allowance for credit losses on off-balance sheet credit exposures is adjusted as a provision for credit loss expense. The estimate includes consideration of the likelihood that funding will occur and an estimate of expected credit losses on commitments expected to be funded over its estimated life. Based on a low likelihood that funding will occur and the Company’s ability to manage the extension of credit to our borrowers, the allowance for credit losses on off-balance sheet credit exposure is not material. Allowance for Credit Losses on Available-for-Sale Debt Securities The Company reviews its portfolio of debt securities in an unrealized loss position at least quarterly. 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, the Company considers, among other things, the performance of any underlying collateral and adverse conditions specifically related to the security. At December 31, 2022 and December 31, 2021 approximately 98 % of the available for sale debt securities held by the Company were issued by the U.S. Treasury, or U.S. government-sponsored entities and agencies. The Company does not consider the unrealized loss position of these securities to be the result of credit factors, because the decline in fair value is attributable to changes in interest rates and illiquidity, and not credit quality, and the Company does not have the intent to sell these securities and it is likely that it will not be required to sell the securities before their anticipated recovery. Therefore, the Company has not recorded an allowance for credit losses against its debt securities portfolio, as the credit risk is not material. PPP Fee Income Policy The Paycheck Protection Program (“PPP”) , established as part of the Coronavirus Aid, Relief and Economic Security (“CARES”) Act, provided that the Small Business Administration ("SBA") would pay processing fees of up to 5 % to lenders based on the volume of the PPP loans disbursed. The fee was based on the balance of each PPP loan outstanding at the time of full disbursement. The Company received processing fees from the SBA of $ 23.8 million in 2021 and $ 30.2 million in 2020. The unamortized balance of these fees on each loan is reported on the Company's consolidated balance sheet as part of the loan balance to which it relates and is recognized over the remaining life of the loan as an adjustment of yield. The unamortized balances of these fees was $ 0 and $ 2.0 million for the year ended December 31, 2022 and 2021, respectively. Nonaccrual Policy A loan is placed on nonaccrual status when, in the opinion of management, the future collectability of both interest and principal is not probable. When interest accrual is discontinued, all unpaid accrued interest is reversed. Interest income is recognized on certain of these loans on a cash basis if the full collection of the remaining principal balance is reasonably expected. Otherwise, interest income is not recognized until the principal balance is fully collected. The Company does not accrue interest on (1) any loan upon which a default of principal or interest has existed for a period of 90 days or over unless the collateral margin or guarantor support are such that full collection of principal and interest are not in doubt, and an orderly plan for collection is in process; and (2) any other loan for which it is expected full collection of principal and interest is not probable. A nonaccrual loan may be restored to an accrual status when none of its principal and interest are past due and unpaid or otherwise becomes well secured and in the process of collection and when prospects for collection of future contractual payments are no longer in doubt. With the exception of a formal debt forgiveness agreement, no loan which has had principal charged-off shall be restored to accrual status unless the charged-off principal has been recovered. Premises and Equipment Premises and equipment are stated at cost, less accumulated depreciation. Depreciation is charged to operating expense and is computed using the straight-line method over the estimated useful lives of the assets. Maintenance and repairs are charged to expense as incurred while improvements are capitalized. Premises and equipment is tested for impairment if events or changes in circumstances occur that indicate that the carrying amount of any premises and equipment may not be recoverable. Impairment losses are measured by comparing the fair values of the premises and equipment with their recorded amounts. Premises that are identified to be sold are transferred to other real estate owned at the lower of their carrying amounts or their fair values less estimated costs to sell. Any losses on premises identified to be sold are charged to operating expense. When premises and equipment are transferred to other real estate owned, sold, or otherwise retired, the cost and applicable accumulated depreciation are removed from the respective accounts and any resulting gains or losses are reported in the consolidated statement of comprehensive income. Construction in progress includes all the costs of construction associated with the building of fixed long-term assets and is included in premises and equipment, net as an asset. When construction is completed, the asset is reclassified as a building or a leasehold improvement and depreciated over its applicable useful life. Leases Certain operating leases are included as right of use lease assets in accrued interest receivable and other assets on the consolidated balance sheet and a related lease liability is included in accrued interest payable and other liabilities on the consolidated balance sheet. Right of use assets represent the Company’s right to use an underlying asset for the lease term and lease liabilities represent the Company’s obligation to make lease payments arising from the lease. The lease liability is measured as the present value of the unpaid lease payments, and the right of use assets value is derived from the calculation of the lease liability. To calculate the discount rate for each lease, the Company uses the rate implicit in the lease if available, otherwise an appropriate Federal Home Loan Bank ("FHLB") advance borrowing rate is used that correlates with the term of the lease. Other Real Estate Owned Other real estate owned ("OREO") consists of properties acquired through foreclosure proceedings or acceptance of a deed in lieu of foreclosure, and premises held for sale. These properties are carried at the lower of the book values of the related loans or fair values based upon appraisals, less estimated costs to sell. Losses arising at the time of reclassification of such properties from loans to OREO are charged directly to the allowance for credit losses. Any losses on premises identified to be sold are charged to operating expense at the time of transfer from premises to OREO. Losses from declines in value of the properties subsequent to classification as OREO are charged to operating expense. Revenues and expenses for OREO property are included in the consolidated statement of comprehensive income for the period in which they occur. Gross rental income for OREO is included in other non-interest income. The expenses of operating or holding OREO property are included in noninterest expense. Intangible Assets and Goodwill Core deposit intangibles are amortized on a straight-line basis over the estimated useful lives of seven to ten years and customer relationship intangibles are amortized on a straight-line basis over the estimated useful life of three to eighteen years . Goodwill is not amortized but is evaluated at a reporting unit level at least annually for impairment, or more frequently if other indicators of impairment are present. At least annually in the fourth quarter, intangible assets are evaluated for possible impairment. Impairment losses are measured by comparing the fair values of the intangible assets with their recorded amounts. Any impairment losses are reported in the consolidated statement of comprehensive income. Advertising Costs Advertising costs are expensed as incurred. Advertising costs for the year ended December 31, 2022 were $ 3.0 million. Advertising costs for the years ended December 31, 2021 and 2020 were $ 3.0 million and $ 3.3 million, respectively. Stock-based Compensation The Company recognizes stock-based compensation as compensation expense in the consolidated statement of comprehensive income based on the fair value of the Company’s stock options on the measurement date, which, for the Company, is the date of the grant. The fair value of each option grant is estimated on the date of grant using the Black-Scholes option-pricing model and is based on certain assumptions including risk-free rate of return, dividend yield, stock price volatility and the expected term. The fair value of each option is expensed over its vesting period. Income Taxes The Company files a consolidated income tax return with its subsidiaries. Federal and state income tax expense or benefit has been allocated to subsidiaries on a separate return basis. Deferred taxes are recognized under the balance sheet method based upon the future tax consequences of temporary differences between the carrying amounts and tax basis of assets and liabilities, using the tax rates expected to apply to taxable income in the periods when the related temporary differences are expected to be realized. Realization of deferred tax assets is dependent upon the generation of a sufficient level of future taxable income and recoverable taxes paid in prior years. Although realization is not assured, management believes it is more likely than not that all of the deferred tax assets will be realized. Earnings Per Common Share Basic earnings per common share is computed by dividing net income, less any preferred dividends requirement, by the weighted average of common shares outstanding. Diluted earnings per common share reflects the potential dilution that could occur if options, convertible securities or other contracts to issue common stock were exercised or converted into common stock or resulted in the issuance of common stock that then shared in the earnings of the Company. Revenue Recognition In addition to lending and related activities, the Company offers various services to customers that generate revenue. Contract performance typically occurs in one year or less. Incremental costs of obtaining a contract are expensed when incurred when the amortization period is one year or less. Sales of real estate The sale of real estate property is generally recognized, along with any associated gain or loss, when control of the property transfers to the buyer. Service and transaction fees on depository accounts Customers often pay certain fees to the bank to access the cash on deposit including certain non-transactional fees such as account maintenance or dormancy fees, and certain transaction-based fees such as non-sufficient funds fees, overdraft, ATM, wire transfer, or foreign exchange fees. Revenue is recognized when the transactions occur or as services are performed over primarily monthly or quarterly periods. Payment is typically received in the period the transactions occur, or in some cases, within 90 days of the service period. Interchange Fees Interchange fees, or “swipe” fees, are charges t

Recent Developments, Including

Recent Developments, Including Mergers and Acquisitions	12 Months Ended
	Dec. 31, 2022
Recent Developments Including Mergers And Acquisitions [Abstract]
Recent Developments, Including Mergers and Acquisitions	(2) RECENT DEVELOPMENTS, INCLUDING MERGERS AND ACQUISITIONS On February 8, 2022, BancFirst Corporation acquired Worthington for an aggregate cash purchase price of $ 77.7 million. Worthington is chartered and regulated by the Texas State Banking Department with one banking location in Arlington, Texas, one in Colleyville, Texas and two in Fort Worth, Texas. At acquisition, Worthington had approximately $ 478 million in total assets, $ 257 million in loans and $ 430 million in deposits. Worthington will continue to operate under a separate charter and remain a separate subsidiary of BancFirst Corporation governed by its existing board of directors. BancFirst Corporation intends to provide an appropriate amount of capital or other support to increase Worthington’s ability to approve larger loans and allow Worthington to continue to grow earning assets. As a result of the acquisition, the Company recorded a core deposit intangible of $ 5.9 million and goodwill of $ 32.1 million. The Company did not incur a material amount of acquisition-related expenses. The effect of this acquisition was included in the consolidated financial statements of the Company from the date of acquisition forward. Pro forma information has not been presented because the acquisition did not have a material effect on the Company’s consolidated financial statements. The acquisition of Worthington complements the Company by expanding its Texas presence in the Dallas-Fort Worth market. On June 17, 2021, the Company completed a private placement, under Regulation D of the Securities Act of 1933, of $ 60 million aggregate principal amount of 3.50 % Fixed-to-Floating Rate Subordinated Notes due 2036 (the “Subordinated Notes”) to various institutional accredited investors. See Note (11) of the Notes to Consolidated Financial Statements for a complete discussion of the Company’s subordinated debt. On May 20, 2021, the Company purchased approximately $ 284 million in total assets, which included $ 195 million in loans, and assumed $ 256 million in deposits and certain other obligations, from The First National Bank and Trust Company of Vinita, Oklahoma for a purchase price of $ 21 million. The Company recorded a bargain purchase gain related to this purchase of $ 4.8 million, which is included in other noninteres t income on the consolidated statement of comprehensive income and other operating activities on the consolidated statement of cash flow. The bargain purchase gain is a noncash item on the consolidated statement of cash flow. In addition, the Company recorded expenses related to this purchase of $ 4.8 million, which are included in noninterest expense. As a result of the purchase, the Company recorded a core deposit intangible of $ 1.7 million. The effect of this purchase was included in the consolidated financial statement of the Company from the date of purchase forward. The purchase did not have a material effect on the Company’s consolidated financial statements. The First National Bank and Trust Company of Vinita was a nationally chartered bank with two banking locations in Vinita and Grove, Oklahoma. On January 22, 2021, the Company sold $ 21 million in loans and $ 38 million in deposits from its Hugo, Oklahoma branch to AmeriState Bank in Atoka, Oklahoma. The Company recorded a gain on the transaction of $ 2.5 million, which is included in noninterest income.

Cash, Due from Banks, Interest-

Cash, Due from Banks, Interest-Bearing Deposits and Federal Funds Sold	12 Months Ended
	Dec. 31, 2022
Cash and Cash Equivalents [Abstract]
Cash, Due from Banks, Interest-Bearing Deposits and Federal Funds Sold	(3) CASH, DUE FROM BANKS, INTEREST-BEARING DEPOSITS AND FEDERAL FUNDS SOLD The Company maintains accounts with the Federal Reserve Bank and various other financial institutions primarily for the purpose of holding excess liquidity and clearing cash items. It may also sell federal funds to certain of these institutions on an overnight basis. At December 31, 2022 and 2021, the Company had no significant concentrations of credit risk with other financial institutions. The Company maintained vault cash and funds on deposit with the Federal Reserve Bank, which is included in the following table: December 31, 2022 2021 (Dollars in thousands) Vault cash and funds on deposit with the Federal Reserve Bank $ 2,942,665 $ 1,907,482

Securities

Securities	12 Months Ended
	Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract]
Securities	(4) SECURITIES The following table summarizes the amortized cost and estimated fair values of debt securities held for investment: Amortized Gross Gross Estimated (Dollars in thousands) December 31, 2022 Mortgage backed securities (1) $ 13 $ — $ — $ 13 States and political subdivisions 1,870 — — 1,870 Other securities 500 — — 500 Total $ 2,383 $ — $ — $ 2,383 December 31, 2021 Mortgage backed securities (1) $ 32 $ 1 $ — $ 33 States and political subdivisions 2,445 — — 2,445 Other securities 500 — — 500 Total $ 2,977 $ 1 $ — $ 2,978 The following table summarizes the amortized cost and estimated fair values of debt securities available for sale: Amortized Gross Gross Estimated (Dollars in thousands) December 31, 2022 U.S. treasuries $ 1,568,563 $ — $ ( 90,699 ) $ 1,477,864 U.S. federal agencies 15,025 198 ( 1 ) 15,222 Mortgage backed securities (1) 18,449 21 ( 1,884 ) 16,586 States and political subdivisions 8,320 35 ( 221 ) 8,134 Asset backed securities 13,371 — ( 361 ) 13,010 Other securities 8,163 — ( 758 ) 7,405 Total $ 1,631,891 $ 254 $ ( 93,924 ) $ 1,538,221 December 31, 2021 U.S. treasuries $ 455,701 $ 3,693 $ ( 1,766 ) $ 457,628 U.S. federal agencies 21,609 335 ( 2 ) 21,942 Mortgage backed securities (1) 28,897 400 ( 14 ) 29,283 States and political subdivisions 6,128 194 ( 3 ) 6,319 Asset backed securities 13,354 3 — 13,357 Other securities 3,000 — ( 6 ) 2,994 Total $ 528,689 $ 4,625 $ ( 1,791 ) $ 531,523 (1) Primarily consists of FHLMC, FNMA, GNMA and mortgage backed securities through U.S. agencies. On January 10, 2022, the Company purchased United States Treasury Notes of $ 600 million par value with an average yield of 1.42 % and an average maturity of 53 months. On August 25, 2022, the Company purchased United States Treasury Notes of $ 300 million par value with an average yield of 3.27 % and an average maturity of 58 months. The maturities of debt securities held for investment and available for sale are summarized in the following table using contractual maturities. Actual maturities may differ from contractual maturities due to obligations that are called or prepaid. For purposes of the maturity table, mortgage-backed securities, which are not due at a single maturity date, have been presented at their contractual maturity. December 31, 2022 2021 Amortized Estimated Amortized Estimated (Dollars in thousands) Held for Investment Contractual maturity of debt securities: Within one year $ 1,186 $ 1,186 $ 577 $ 577 After one year but within five years 1,195 1,195 2,396 2,397 After five years but within ten years 2 2 4 4 After ten years — — — — Total $ 2,383 $ 2,383 $ 2,977 $ 2,978 Available for Sale Contractual maturity of debt securities: Within one year $ 101,607 $ 100,655 $ 58,478 $ 58,688 After one year but within five years 1,316,874 1,233,725 408,253 410,049 After five years but within ten years 170,513 163,101 10,851 11,011 After ten years 42,897 40,740 51,107 51,775 Total debt securities $ 1,631,891 $ 1,538,221 $ 528,689 $ 531,523 The following is a detail of proceeds from sales and the realized losses on available for sale debt securities: Year Ended December 31, 2022 2021 2020 (Dollars in thousands) Proceeds $ 222,474 $ — $ — Gross losses realized 3,990 — — In March 2022, the Company sold $ 226 million of debt securities with an average yield of 0.16 %, the proceeds of which were subsequently reinvested in $ 220 million of debt securities with an average yield of 1.86 %. The Company used specific identification to reclassify the unrealized loss in other comprehensive income to a realized loss, as shown in the consolidated statements of comprehensive income. There were no sales of securities and therefore no proceeds from sales or realized securities losses on available for sale debt securities for the years ended December 31, 2021 and 2020, respectively. Realized gains/losses on debt and equity securities are reported as securities transactions within the noninterest income section of the consolidated statement of comprehensive income. The following table is a summary of the Company’s book value of debt securities that were pledged as collateral for public funds on deposit, repurchase agreements and for other purposes as required or permitted by law: December 31, 2022 2021 (Dollars in thousands) Book value of pledged securities $ 573,952 $ 473,026 The following table summarizes debt securities with unrealized losses, segregated by the duration of the unrealized loss, at December 31, 2022 and 2021 respectively: Less than 12 Months More than 12 Months Total Number of investments Estimated Unrealized Estimated Unrealized Estimated Unrealized (Dollars in thousands) December 31, 2022 Available for Sale U.S. treasuries 74 $ 787,925 $ 27,078 $ 689,939 $ 63,621 $ 1,477,864 $ 90,699 U.S. federal agencies 1 — — 349 1 349 1 Mortgage backed securities 92 10,001 1,239 5,055 645 15,056 1,884 States and political subdivisions 8 2,308 184 464 37 2,772 221 Asset backed securities 1 13,010 361 — — 13,010 361 Other securities 3 4,871 291 2,534 467 7,405 758 Total 179 $ 818,115 $ 29,153 $ 698,341 $ 64,771 $ 1,516,456 $ 93,924 December 31, 2021 Available for Sale U.S. treasuries 10 $ 298,080 $ 1,766 $ — $ — $ 298,080 $ 1,766 U.S. federal agencies 1 376 2 — — 376 2 Mortgage backed securities 7 2,824 14 — — 2,824 14 States and political subdivisions 2 505 3 — — 505 3 Other securities 1 2,994 6 — — 2,994 6 Total 21 $ 304,779 $ 1,791 $ — $ — $ 304,779 $ 1,791 Management has the ability and intent to hold the debt securities classified as held for investment until they mature, at which time the Company will receive full value for the debt securities. Furthermore, as of December 31, 2022 and 2021, the Company also had the ability and intent to hold the debt securities classified as available for sale for a period of time sufficient for a recovery of cost. The unrealized losses are due to increases in market interest rates over the yields available at the time the underlying debt securities were purchased. The fair value of those debt securities having unrealized losses is expected to recover as the securities approach their maturity date or repricing date, or if market yields for such investments decline. Management has no intent or requirement to sell before the recovery of the unrealized loss; therefore, no significant impairment loss was realized in the Company’s consolidated statement of comprehensive income.

Loans Held for Investment and A

Loans Held for Investment and Allowance for Credit Losses on Loans	12 Months Ended
	Dec. 31, 2022
Receivables [Abstract]
Loans Held for Investment and Allowance for Credit Losses on Loans	(5) LOANS HELD FOR INVESTMENT AND ALLOWANCE FOR CREDIT LOSSES ON LOANS Loans that were designated as Other and consisted mainly of Small Business Administration (“SBA”) loans were reclassified to their more descriptive portfolio segment during the year. Therefore, we no longer have an Other loan portfolio segment. Each loan segment is made up of loan categories possessing similar risk characteristics. Management believes this accurately represents the risk profile of each loan segment. The prior period amounts have been revised to conform to the current period presentation. These reclassifications did not have a significant impact on the allowance for credit losses. Loans held for investment are summarized by portfolio segment as follows: December 31, 2022 2021 (Dollars in thousands) Real estate: Commercial real estate owner occupied $ 906,461 $ 775,554 Commercial real estate non-owner occupied 1,385,307 1,095,324 Construction and development < 60 months 481,070 415,466 Construction residential real estate < 60 months 304,432 254,524 Residential real estate first lien 1,119,706 937,006 Residential real estate all other 199,005 161,018 Farmland 261,518 272,179 Commercial and agricultural non-real estate (2) 1,376,375 1,416,093 Consumer non-real estate 447,039 413,370 Oil and gas 462,650 428,908 Total loans (1) $ 6,943,563 $ 6,169,442 (1) Excludes accrued interest receivable of $ 30.6 million at December 31, 2022 and $ 21.0 million at December 31, 2021, that is recorded in accrued interest receivable and other assets. (2) Includes PPP loans held for investment of $ 1.1 million, net of unamortized processing fees of $ 0 at December 31, 2022 and $ 80.4 million, net of unamortized processing fees of $ 2.0 million at December 31, 2021. In April 2020, the Company began originating loans to qualified small businesses under the Paycheck Protection Program (“PPP”) administered by the SBA. Since PPP loans are fully guaranteed by the SBA, there is no expected credit loss related to these loans. The Company had processing fees, which were recognized as interest income related to the PPP loans totaling $ 2.1 million and $ 36.4 million during the years ended December 31, 2022 and 2021, respectively. The Company's loans are currently 82 % held by BancFirst and 18 % held by Pegasus and Worthington. In addition, approximately 67 % of the Company's loans are secured by real estate. Credit risk on loans is managed through limits on amounts loaned to individual and related borrowers, underwriting standards and loan monitoring procedures. The amounts and types of collateral obtained, if any, to secure loans are based upon the Company’s underwriting standards and management’s credit evaluation. Collateral varies, but may include real estate, equipment, accounts receivable, inventory, livestock and securities. The Company’s interest in collateral is secured through filing mortgages and liens, and in some cases, by possession of the collateral. The allowance for credit losses is measured on a collective (pool) basis when similar risk characteristics exist. The Company has identified the following portfolio segments, which includes the applicable weighted average remaining life, and measures the allowance for credit losses using the vintage loss analysis adjusted for qualitative factors: Portfolio Segments Life (in years) Real estate: Commercial real estate owner occupied 9 Commercial real estate non-owner occupied 6 Construction and development < 60 months 3 Construction residential real estate < 60 months 1 Residential real estate first lien 14 Residential real estate all other 7 Farmland 13 Commercial and agricultural non-real estate 3 Consumer non-real estate 4 Oil and gas 2 These portfolio segments are separately identified because they exhibit distinctive risk characteristics, such as financial asset types, loan purpose, collateral, and industry of the borrower. A summary of our primary portfolio segments is as follows: Commercial real estate owner occupied. Commercial real estate owner occupied are nonresidential property loans for which the primary source of repayment is the cash flow from the ongoing operations and activities conducted by the entity, or an affiliate of the entity, who owns the property. This category includes, among other loans, loans secured by office buildings, garden office buildings, manufacturing facilities, warehouse and flex warehouse facilities, hospitals, and car washes unless the property is owned by an investor who leases the property to the operator who, in turn, is not related to or affiliated with the investor. Commercial real estate non-owner occupied. Commercial real estate non-owner occupied are nonresidential property loans where the primary source of repayment is derived from rental income associated with the property or the proceeds of the sale, refinancing, or permanent financing of the property. This category includes, among other loans, loans secured by shopping centers, office buildings, hotels/motels, nursing homes, assisted-living facilities, mini-storage warehouse facilities, and similar properties. Construction and development < 60 months . Residential development loans include loans to develop raw land into a residential development. Advances on the loans typically include land costs, hard costs (grading, utilities, roads, etc.), soft costs (engineering fees, development fees, entitlement fees, etc.) and carrying costs until the development is completed. Upon completion of the development, the loan is typically repaid through the sale of lots to homebuilders. Construction residential real estate < 60 months. Residential construction includes loans to builders for speculative or custom homes, as well as direct loans to individuals for construction of their personal residence. Custom construction and self-construction loans typically will have commitments in place for long-term financing at the completion of construction. Speculative construction loans generally will have periodic curtailment plans beginning after completion of construction and a reasonable time for sales to have occurred. Residential real estate first lien. Residential real estate first lien loans includes all closed-end loans secured by first liens on 1-to-4 family residential properties. This category includes property containing 1-to-4 dwelling units (including vacation homes) or more than four dwelling units if each is separated from other units by dividing walls that extend from ground to roof. This category also includes individual condominium dwelling units and loans secured by an interest in individual cooperative housing units, even if in a building with five or more dwelling units. Residential real estate all other. Residential real estate all other loans includes loans secured by junior (i.e., other than first) liens on 1-to-4 family residential properties. This category includes loans secured by junior liens even if the Company also holds a loan secured by a first lien on the same 1-to-4 family residential property. Farmland. This category includes loans secured by all land known to be used or usable for agricultural purposes, such as crop and livestock production. Farmland includes grazing or pasture land, whether tillable or not and whether wooded or not. Commercial and agricultural non-real estate. Commercial and agricultural non-real estate represent loans for working capital, facilities acquisition or expansion, purchase of equipment and other needs of commercial customers primarily located within Oklahoma. Loans in this category include commercial and industrial, agriculture and state and political subdivisions. Consumer non-real estate. Consumer loans are loans to individuals for household, family and other personal expenditures. Commonly, such loans are made to finance purchases of consumer goods, such as automobiles, boats, household goods, vacations and education. Oil and gas. Oil and gas loans represent loans for producing oil and gas properties and any other mineral interests that may be pumped, mined, quarried or otherwise extracted from the earth. These loans also include upstream and midstream energy loans, and loans to companies that provide ancillary services to the energy industry, such as transportation, wellsite preparation contractors and equipment manufacturers. Troubled Debt Restructurings, Other Real Estate Owned and Repossessed Assets and Held for Sale Assets The following is a summary of troubled debt restructurings and other real estate owned and repossessed assets: December 31, 2022 2021 (Dollars in thousands) Troubled debt restructurings $ 2,234 $ 3,665 Other real estate owned and repossessed assets $ 36,936 $ 39,553 The Company charges interest on principal balances outstanding on troubled debt restructurings during deferral periods. The current and future financial effects of the recorded balance of loans considered to be troubled debt restructurings were not considered to be material. Other real estate owned included a commercial real estate property recorded at $ 29.4 million at December 31, 2022 and $ 29.5 million at December 31, 2021. Rental income for this property is included in other noninterest income on the consolidated statements of comprehensive income. Operating expense for this property is included in net expense from other real estate owned in the noninterest expense section on the consolidated statements of comprehensive income. This property had the following rental income and operating expenses for the periods presented. For the Twelve Months Ended December 31, 2022 2021 2020 (Dollars in thousands) Rental income $ 10,340 $ 9,975 $ — Operating expense $ 9,863 $ 8,727 $ — At December 31, 2021, other real estate owned also included $ 2.4 million related to the Company's previous headquarters. The previous headquarters was sold during the second quarter of 2022. During 2022, the Company sold property held in other real estate owned for a total gain of $ 4.2 million compared to gains of $ 618,000 in 2021 and $ 2.4 million in 2020. During 2022, the Company wrote down property held in other real estate owned for a total of $ 3.7 million compared to write downs of $ 538,000 in 2021 and $ 558,000 in 2020. Nonaccrual loans The Company did no t recognize any interest income on nonaccrual loans for any of the years ended December 31, 2022, 2021 or 2020. In addition, there were no nonaccrual loans for which there was no related allowance for credit losses at both December 31, 2022 and December 31, 2021. Had nonaccrual loans performed in accordance with their original contractual terms, the Company would have recognized additional interest income of $ 1.3 million in 2022, $ 2.2 million in 2021 and $ 2.8 million in 2020. Nonaccrual loans guaranteed by government agencies totaled $ 4.7 million at December 31, 2022 and $ 3.3 million at December 31, 2021. The following table is a summary of amounts included in nonaccrual loans, segregated by portfolio segment. December 31, 2022 December 31, 2021 (Dollars in thousands) Real estate: Commercial real estate owner occupied $ 1,795 $ 3,220 Commercial real estate non-owner occupied 667 407 Construction and development < 60 months 93 80 Construction residential real estate < 60 months 430 — Residential real estate first lien 1,947 2,763 Residential real estate all other 55 280 Farmland 1,462 4,224 Commercial and agricultural non-real estate 8,338 8,700 Consumer non-real estate 192 148 Oil and gas 320 1,070 Total $ 15,299 $ 20,892 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 an age analysis of our loans held for investment: Age Analysis of Past Due Loans 30-59 60-89 90 Days Total Current Total Loans Accruing (Dollars in thousands) December 31, 2022 Real estate: Commercial real estate owner occupied $ 1,314 $ 1,524 $ 4,580 $ 7,418 $ 899,043 $ 906,461 $ 4,580 Commercial real estate non-owner occupied 6,237 — 42 6,279 1,379,028 1,385,307 43 Construction and development < 60 months 535 40 114 689 480,381 481,070 81 Construction residential real estate < 60 months 1,321 282 148 1,751 302,681 304,432 — Residential real estate first lien 3,415 1,076 844 5,335 1,114,371 1,119,706 349 Residential real estate all other 265 37 185 487 198,518 199,005 166 Farmland 1,346 — 325 1,671 259,847 261,518 114 Commercial and agricultural non-real estate 3,500 2,176 4,712 10,388 1,365,987 1,376,375 1,285 Consumer non-real estate 2,591 648 585 3,824 443,215 447,039 467 Oil and gas 654 — — 654 461,996 462,650 — Total $ 21,178 $ 5,783 $ 11,535 $ 38,496 $ 6,905,067 $ 6,943,563 $ 7,085 December 31, 2021 Real estate: Commercial real estate owner occupied $ 2,046 $ 223 $ 1,465 $ 3,734 $ 771,820 $ 775,554 $ 18 Commercial real estate non-owner occupied 7,244 — — 7,244 1,088,080 1,095,324 — Construction and development < 60 months 136 — — 136 415,330 415,466 — Construction residential real estate < 60 months 2,264 — — 2,264 252,260 254,524 — Residential real estate first lien 3,351 567 2,817 6,735 930,271 937,006 1,704 Residential real estate all other 293 30 451 774 160,244 161,018 431 Farmland 253 37 2,077 2,367 269,812 272,179 139 Commercial and agricultural non-real estate 2,506 546 7,118 10,170 1,405,923 1,416,093 2,418 Consumer non-real estate 1,873 321 272 2,466 410,904 413,370 254 Oil and gas — — — — 428,908 428,908 — Total $ 19,966 $ 1,724 $ 14,200 $ 35,890 $ 6,133,552 $ 6,169,442 $ 4,964 Due to the impacts of the COVID-19 pandemic, the Company had $ 47.6 million in modified loans as of December 31, 2022 and $ 53.9 million in modified loans as of December 31, 2021, most of which were secured by commercial real estate. These modifications were undertaken in response to Section 4013 of the CARES Act and the regulatory intent outlined in the Interagency Statement on Loan Modifications by Financial Institutions Working with Customers Affected by the Coronavirus and to provide businesses financial flexibility until the economy has time to recover to a more normal level of activity. However, these modifications, which typically involve payment modifications and forbearance, also have the effect of delaying recognition of loans that may ultimately be permanently impaired. These modified loans are included in Current Loans in the table above. Credit Quality Indicators The Company considers credit quality indicators to monitor the credit risk in the loan portfolio including volume and severity of loan delinquencies, nonaccrual loans, internal grading of loans, historical credit loss experience and economic conditions. These indicators are reviewed and updated regularly throughout the year. An internal risk grading system is used to indicate the credit risk of loans. The loan grades used by the Company are for internal risk identification purposes and do not directly correlate to regulatory classification categories or any financial reporting definitions. The general characteristics of the risk grades are as follows: Grade 1 – Acceptable - Loans graded 1 represent reasonable and satisfactory credit risk which requires normal attention and supervision. Capacity to repay through primary and/or secondary sources is not questioned. Grade 2 – Acceptable - Increased Attention - This category consists of loans that have credit characteristics deserving management’s close attention. These complexities or potential weaknesses could result in deterioration of the repayment prospects for the loan or the Company's credit position at some future date. Such credit characteristics include loans to highly leveraged borrowers in cyclical industries, adverse financial trends which could potentially weaken repayment capacity, loans that have fundamental structure complexity or deficiencies, loans lacking secondary sources of repayment where prudent, and loans with deficiencies in essential documentation, including financial information. Grade 3 – Loans with Problem Potential - This category consists of performing loans which are considered to exhibit problem potential. Loans in this category would generally include, but not be limited to, borrowers with a weakened financial condition or poor performance history, past dues, loans restructured to reduce payments to an amount that is below market standards and/or loans with severe documentation problems. In general, these loans have no identifiable loss potential in the near future; however, the possibility of a loss developing is heightened. Grade 4 - Problem Loans/Assets – Nonperforming - This category consists of nonperforming loans/assets which are considered to be problems. Nonperforming loans are described as being 90 days and over past due and still accruing, and loans that are nonaccrual. The government guaranteed portion of SBA loans is excluded. Grade 5 - Loss Potential - This category consists of loans/assets which are considered to possess loss potential. While the loss may not occur in the current year, management expects that loans/assets in this category will ultimately result in a loss, unless substantial improvement occurs. Grade 6 - Charge Off - This category consists of loans that are considered uncollectible and other assets with little or no value. The Company’s revolving loans that are converted to term loans are not material and therefore have not been presented. The following tables summarize our gross loans held for investment by year of origination and internally assigned credit grades as of the period indicated: Term Loans Amortized Cost Basis by Origination Year 2022 2021 2020 2019 2018 Prior Revolving Loans Amortized Cost Basis Total (Dollars in thousands) December 31, 2022 Commercial real estate owner occupied Grade 1 $ 171,615 $ 145,317 $ 106,803 $ 91,892 $ 44,086 $ 119,755 $ 53,026 $ 732,494 Grade 2 34,800 34,283 27,153 18,072 8,528 29,077 14,737 166,650 Grade 3 235 1,718 387 1,334 332 1,161 62 5,229 Grade 4 40 269 — 1,110 180 489 — 2,088 Total commercial real estate owner occupied 206,690 181,587 134,343 112,408 53,126 150,482 67,825 906,461 Commercial real estate non-owner occupied Grade 1 350,425 239,477 170,415 108,095 23,754 66,564 45,172 1,003,902 Grade 2 115,372 50,573 29,031 46,904 24,877 70,686 31,928 369,371 Grade 3 7,677 — 153 2,733 64 1,318 — 11,945 Grade 4 — — — — 42 47 — 89 Total commercial real estate non-owner occupied 473,474 290,050 199,599 157,732 48,737 138,615 77,100 1,385,307 Construction and development < 60 months Grade 1 169,189 92,988 40,187 5,721 3,467 5,071 40,474 357,097 Grade 2 36,042 20,273 1,513 14,368 1,648 774 47,988 122,606 Grade 3 967 — 141 — — 8 158 1,274 Grade 4 — — 33 47 — 13 — 93 Total construction and development < 60 months 206,198 113,261 41,874 20,136 5,115 5,866 88,620 481,070 Construction residential real estate < 60 months Grade 1 210,099 12,824 259 18 — 42 36,114 259,356 Grade 2 39,689 1,152 102 — — 400 2,091 43,434 Grade 3 1,212 — — — — — — 1,212 Grade 4 420 10 — — — — — 430 Total construction residential real estate < 60 months 251,420 13,986 361 18 — 442 38,205 304,432 Residential real estate first lien Grade 1 304,206 205,277 141,807 85,850 56,028 137,254 4,100 934,522 Grade 2 46,433 36,877 25,623 13,414 11,725 37,242 — 171,314 Grade 3 1,940 1,903 1,065 1,689 497 3,889 — 10,983 Grade 4 55 311 175 386 144 1,816 — 2,887 Total residential real estate first lien 352,634 244,368 168,670 101,339 68,394 180,201 4,100 1,119,706 Residential real estate all other Grade 1 31,762 11,012 10,696 5,458 3,607 11,198 42,629 116,362 Grade 2 5,657 1,887 1,744 1,589 1,237 2,574 64,231 78,919 Grade 3 381 186 71 50 201 786 1,828 3,503 Grade 4 — 18 28 32 39 53 51 221 Total residential real estate all other 37,800 13,103 12,539 7,129 5,084 14,611 108,739 199,005 Farmland Grade 1 47,211 33,771 29,454 18,693 10,038 29,724 6,126 175,017 Grade 2 16,140 14,294 6,536 8,855 5,428 14,373 11,281 76,907 Grade 3 2,196 111 2,090 63 141 2,023 1,926 8,550 Grade 4 660 37 55 — 81 211 — 1,044 Total farmland 66,207 48,213 38,135 27,611 15,688 46,331 19,333 261,518 Commercial and agricultural non-real estate Grade 1 303,340 215,247 72,246 53,808 15,410 42,842 316,942 1,019,835 Grade 2 100,010 54,656 20,423 12,914 16,187 3,832 126,503 334,525 Grade 3 6,332 826 1,682 816 1,745 797 5,070 17,268 Grade 4 240 599 1,099 825 410 1,111 199 4,483 Grade 5 — — — 264 — — — 264 Total commercial and agricultural non-real estate 409,922 271,328 95,450 68,627 33,752 48,582 448,714 1,376,375 Consumer non-real estate Grade 1 203,335 104,409 39,822 21,076 6,589 2,187 26,263 403,681 Grade 2 21,078 10,542 3,978 1,541 822 1,351 816 40,128 Grade 3 827 671 405 282 134 63 4 2,386 Grade 4 229 351 54 141 56 13 — 844 Total consumer non-real estate 225,469 115,973 44,259 23,040 7,601 3,614 27,083 447,039 Oil and gas Grade 1 24,938 125,209 16,482 682 1,678 246 199,610 368,845 Grade 2 7,610 10,668 766 23,040 3,167 327 45,240 90,818 Grade 3 2,117 47 5 — — — 498 2,667 Grade 4 — 320 — — — — — 320 Total oil and gas 34,665 136,244 17,253 23,722 4,845 573 245,348 462,650 Total loans held for investment $ 2,264,479 $ 1,428,113 $ 752,483 $ 541,762 $ 242,342 $ 589,317 $ 1,125,067 $ 6,943,563 Term Loans Amortized Cost Basis by Origination Year 2021 2020 2019 2018 2017 Prior Revolving Loans Amortized Cost Basis Total (Dollars in thousands) December 31, 2021 Commercial real estate owner occupied Grade 1 $ 153,887 $ 130,835 $ 113,830 $ 59,163 $ 37,647 $ 102,438 $ 25,128 $ 622,928 Grade 2 35,475 33,198 21,570 8,397 9,936 29,191 9,152 146,919 Grade 3 — 275 605 261 465 1,071 62 2,739 Grade 4 337 600 890 445 — 371 325 2,968 Total commercial real estate owner occupied 189,699 164,908 136,895 68,266 48,048 133,071 34,667 775,554 Commercial real estate non-owner occupied Grade 1 252,718 204,892 114,429 51,440 37,305 118,264 29,257 808,305 Grade 2 53,548 51,206 50,912 38,850 19,466 36,808 24,335 275,125 Grade 3 7,095 — 3,254 121 234 656 — 11,360 Grade 4 407 — — 35 — 92 — 534 Total commercial real estate non-owner occupied 313,768 256,098 168,595 90,446 57,005 155,820 53,592 1,095,324 Construction and development < 60 months Grade 1 173,384 34,351 57,729 9,276 1,953 4,181 32,294 313,168 Grade 2 37,275 7,511 13,161 4,526 803 510 37,153 100,939 Grade 3 1,273 — — 6 — — — 1,279 Grade 4 — — 56 6 18 — — 80 Total construction and development < 60 months 211,932 41,862 70,946 13,814 2,774 4,691 69,447 415,466 Construction residential real estate < 60 months Grade 1 193,311 7,786 41 — 18 29 16,247 217,432 Grade 2 28,170 2,564 — — — 425 5,455 36,614 Grade 3 478 — — — — — — 478 Total construction residential real estate < 60 months 221,959 10,350 41 — 18 454 21,702 254,524 Residential real estate first lien Grade 1 256,834 174,718 99,082 64,949 45,211 128,898 3,928 773,620 Grade 2 44,080 26,073 15,719 12,612 10,926 38,230 — 147,640 Grade 3 1,151 1,266 2,054 1,930 1,155 3,523 — 11,079 Grade 4 64 489 479 1,247 915 1,473 — 4,667 Grade 5 — — — — — — — — Total residential real estate first lien 302,129 202,546 117,334 80,738 58,207 172,124 3,928 937,006 Residential real estate all other Grade 1 16,376 13,320 8,691 5,609 4,101 12,386 30,840 91,323 Grade 2 2,183 2,941 1,919 1,500 895 2,202 55,000 66,640 Grade 3 250 98 112 232 702 309 538 2,241 Grade 4 156 180 — 38 12 84 344 814 Total residential real estate all other 18,965 16,539 10,722 7,379 5,710 14,981 86,722 161,018 Farmland Grade 1 47,485 39,216 23,627 15,180 12,579 29,457 6,946 174,490 Grade 2 16,063 8,702 23,688 5,488 4,159 10,848 10,455 79,403 Grade 3 3,587 4,021 1,514 74 1,293 1,316 3,386 15,191 Grade 4 1,109 379 — 1,121 109 145 232 3,095 Total farmland 68,244 52,318 48,829 21,863 18,140 41,766 21,019 272,179 Commercial and agricultural non-real estate Grade 1 445,864 121,786 95,379 44,593 32,169 43,750 307,361 1,090,902 Grade 2 85,920 30,568 25,097 9,680 2,735 10,821 105,700 270,521 Grade 3 2,995 2,185 1,347 11,479 1,291 599 27,716 47,612 Grade 4 870 221 1,337 654 573 1,109 2,294 7,058 Total commercial and agricultural non-real estate 535,649 154,760 123,160 66,406 36,768 56,279 443,071 1,416,093 Consumer non-real estate Grade 1 201,893 80,616 43,793 17,587 5,723 2,048 20,600 372,260 Grade 2 19,349 7,551 6,119 2,167 816 1,342 996 38,340 Grade 3 1,146 307 551 203 86 31 4 2,328 Grade 4 62 90 199 69 14 8 — 442 Total consumer non-real estate 222,450 88,564 50,662 20,026 6,639 3,429 21,600 413,370 Oil and gas Grade 1 188,072 26,090 6,579 1,257 89 73 139,687 361,847 Grade 2 17,150 9,774 13,909 2,657 170 215 13,186 57,061 Grade 3 6,641 10 — — — 255 2,024 8,930 Grade 4 1,000 — — — — — 70 1,070 Total oil and gas 212,863 35,874 20,488 3,914 259 543 154,967 428,908 Total loans held for investment $ 2,297,658 $ 1,023,819 $ 747,672 $ 372,852 $ 233,568 $ 583,158 $ 910,715 $ 6,169,442 Allowance for Credit Losses Methodology The Company determines its provision for credit losses and allowance for credit losses using the expected loss methodology that is referred to as the CECL model. The allowance for credit losses is measured on a collective (pool) basis when similar risk characteristics exist. The Company elected to utilize a methodology known as vintage loss analysis for BancFirst, Pegasus, and Worthington Bank. Vintage loss analysis measures impairment based on the age of the accounts and the historical asset performance of assets with similar risk characteristics. Vintage loss analysis determines expected losses by allowing the Company to calculate the cumulative loss rates of a given loan pool and in so doing, determine the loan pool’s lifetime expected loss experience relative to the appropriate type of financial assets that share similar risk characteristics. Vintage loss analysis uses different “vintages” analyzed by year of origination through the weighted average maturity of each loan pool. The key quantitative inputs used in the Company’s estimate of the allowance for credit losses include 1) all available loan data tracked by year of origination, 2) total charge-offs for each specific loan pool recorded since year of origination, 3) recovery rate calculated by the average recovery over the previous seven years across all loan pools, and 4) a weighting factor biased to more recent loss experience. The quantitative expected credit loss is calculated by dividing each year’s net charge-offs by the original balance. The respective vintage’s original balance remains the denominator in each annual calculation, as it references the specific vintage’s initial balance. The loss experience of this original balance is tracked annually and summed over the life of the loan for each separate loan pool, leaving a cumulative life of credit loss rate based on historic averages weighted towards more recent loss experience. These key quantitative inputs change from period to period as new loans are originated, and charge-offs and recoveries are recognized. The recovery rate is revised on an annual basis, taking into consideration the most recent seven years. The weighting factor percentages remain static, however, the most recent year receives the highest weighting percentage. The BancFirst Senior Loan Committee (“the SLC”) sets BancFirst qualitative adjustments. In setting the qualitative adjustments, they consider several factors, including external economic information, peer bank comparisons and experience with the loan portfolio. The SLC also considers Moody’s Analytics dataset. From this dataset, BancFirst selects a range of 3 probability scenarios from two economic forecasts. To determine the appropriate correlation to our loss experience, BancFirst compares the economic indicators over the past ten years of charge-off history to arrive at a correlation factor. BancFirst then applies the correlation factor to the change in the forecast of the aforementioned economic indicators over the next 18-24 months, which is driven by management’s judgment of a reasonable and supportable forecast period to arrive at a percentage range of qualitative loss adjustment attributable to economic forecasts. The SLC establishes a qualitative adjustment for each loan pool using these factors. For periods beyond which BancFirst is able to make or obtain reasonable and supportable forecasts of expected credit losses, BancFirst reverts to historical loss information. In some cases, management may determine a loan to be collateral dependent. A loan is considered collateral-dependent when the repayment is expected to be provided substantially through the operation or sale of the collateral when the borrower is experiencing financial difficulty based on the Company's assessment as of the reporting date. For collateral dependent loans, the standard allows institutions to use, as a practical expedient, the fair value of the collateral to measure expected credit losses on collateral-dependent financial assets. This amount is included in the allowance for credit losses. The increase in allowance for credit losses during 2022 was related to the purchase of loans without credit deterioration during the year along with loan growth. The decrease in the allowance for credit losses during 2021 was driven by a reversal of a pandemic-related provision during 2021 based on sustained improvements in the economy, both nationally and in the Company's markets, which reduced the amount of expected credit losses within the loan portfolio. This reduction during 2021 was partially offset by additional allowance for credit losses required for newly acquired loans. The allowance for credit losses for the oil and gas category was reduced during 2021 due to the increases in oil and gas commodity prices contributing to a more stable and profitable energy industry; however this decrease was offset by an increase in allowance for credit losses for the commercial real estate non-owner occupied category due to ongoing uncertainty regarding the pandemic's long-term impact on the office and retail sectors. The following table details activity in the allowance for credit losses on loans for the period presented. Allocation of a portion of the allowance to one category of loans does not preclude its availability to absorb losses in other categories. Allowance for Credit Losses Balance at Initial allowance on loans purchased with credit deterioration Charge- Recoveries Net Provision Balance at (Dollars in thousands) Year ended December 31, 2022 Real estate: Commercial real estate owner occupied $ 7,568 $ — $ ( 20 ) $ 507 $ 487 $ ( 1,643 ) $ 6,412 Commercial real estate non-owner occupied 16,987 — — — — 13,205 30,192 Construction and development < 60 months 3,490 — ( 93 ) 12 ( 81 ) 369 3,778 Construction residential real estate < 60 months 1,092 — — — — 2,184 3,276 Residential real estate first lien 3,076 2 ( 106 ) 87 ( 19 ) 1,039 4,098 Residential real estate all other 2,104 — ( 38 ) 405 367 ( 626 ) 1,845 Farmland 4,822 — — — — ( 1,312 ) 3,510 Commercial and agricultural non-real estate 28,085 44 ( 1,756 ) 222 ( 1,534 ) 716 27,311 Consumer non-real estate 3,734 25 ( 768 ) 193 ( 575 ) 951 4,135 Oil and gas 12,978 — — — — ( 4,807 ) 8,171 Total $ 83,936 $ 71 $ ( 2,781 ) $ 1,426 $ ( 1,355 ) $ 10,076 $ 92,728 Year ended December 31, 2021 Real estate: Commercial real estate owner occupied $ 8,470 $ 1,080 $ ( 38 ) $ 74 $ 36 $ ( 2,018 ) $ 7,568 Commercial real estate non-owner occupied 12,318 824 ( 803 ) 67 ( 736 ) 4,581 16,987 Construction and development < 60 months 2,723 173 — 12 12 582 3,490 Construction residential real estate < 60 months 726 — — — — 366 1,092 Residential real estate first lien 2,822 126 ( 87 ) 55 ( 32 ) 160 3,076 Residential real estate all other 2,236 — ( 521 ) 52 ( 469 ) 337 2,104 Farmland 3,153 395 ( 889 ) 1 ( 888 ) 2,162 4,822 Commercial and agricultural non-real estate 34,643 5,663 ( 4,643 ) 219 ( 4,424 ) ( 7,797 ) 28,085 Consumer non-real estate 3,542 38 ( 864 ) 326 ( 538 ) 692 3,734 Oil and gas 20,733 — — — — ( 7,755 ) 12,978 Total $ 91,366 $ 8,299 $ ( 7,845 ) $ 806 $ ( 7,039 ) $ ( 8,690 ) $ 83,936 Purchased Credit Deteriorated Loans The Company has purchased loans, for which there was, at acquisition, evidence of more than insignificant deterioration of credit quality since origination. The purchased credit-deteriorated loans for the period are as follows: Loans acquired with deteriorated credit quality (Dollars in thousands) For the year ended December 31, 2022 Purchase price of loans at acquisition $ 668 Allowance for credit losses at acquisition 71 Par value of acquired loans at acquisition $ 739 For the year ended December 31, 2021 Purchase price of loans at acquisition $ 39,284 Allowance for credit losses at acquisition 8,299 Par value of acquired loans at acquisition $ 47,583 Collateral Dependent Loans A loan is considered collateral-dependent when the b

Premises and Equipment, Net and

Premises and Equipment, Net and Other Assets	12 Months Ended
	Dec. 31, 2022
Property, Plant and Equipment [Abstract]
Premises and Equipment, Net and Other Assets	(6) PREMISES AND EQUIPMENT, NET AND OTHER ASSETS The following is a summary of premises and equipment by classification: December 31, Estimated 2022 2021 (Dollars in thousands) Land $ 47,856 $ 44,588 Buildings 10 to 40 years 266,660 256,738 Furniture, fixtures and equipment 3 to 15 years 91,340 89,058 Construction in progress 16,613 12,335 Accumulated depreciation ( 144,381 ) ( 133,672 ) Premises and equipment, net $ 278,088 $ 269,047 Non-cash items in Premises and Equipment, Net The Company had $ 1.1 mill ion and $ 1.0 million in construction in progress for retainage payable at December 31, 2022 and 2021, respectively. Retainage payable is not remitted to the vendor until completion of the project and is therefore not included in the consolidated statement of cash flow. Construction in Progress Construction in progress included in the table above is primarily related to the renovation of BancFirst Tower, which began in 2018. When renovations on the building are completed, the asset is reclassified as buildings and depreciated over its applicable useful life. Other Assets Other assets includes the cash surrender value of key-man life insurance policies totaling $ 82.7 million at December 31, 2022 and $ 81.4 million at December 31, 2021. Equity securities are reported in other assets on the consolidated balance sheet. The Company invests in equity securities without readily determinable fair values. These equity securities are reported at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer. The realized and unrealized gains and losses are reported as securities transactions in the noninterest income section of the consolidated statements of comprehensive income. The balance of equity securities w as $ 15.5 mil lion at December 31, 2022 and $ 10.6 million at December 31, 2021. The balance of other assets included equity interests of previous borrowers in the oil and gas industry, which were received through bankruptcy proceedings, which totaled $ 21.4 million at December 31, 2022 and $ 16.4 million at December 31, 2021. Under the equity method, the carrying value of a bank’s investment in an investee is originally recorded at cost but is adjusted periodically to record as income the bank’s proportionate share of the investee’s earnings or losses and decreased by the amount of cash dividends or similar distributions received from the investee. Low Income Housing Tax Credit Investments The Company invests in affordable housing projects that qualify for the low-income housing tax credit (LIHTC), which is designed to promote private development of low-income housing. These investments generate a return primarily through realization of federal tax credits, and also through a tax deduction generated by operating losses of the investments. The investments are amortized through tax expense using the proportional amortization method as related tax credits are utilized. The Company is periodically required to provide additional contributions at the discretion of the project sponsors. Although in some cases the Company’s investment may exceed 50 % of the equity interest in an entity, the Company does not consolidate these structures as variable interest entities due to the project sponsor’s ability to manage the projects, which is indicative of power over them. Total LIHTC investments were $ 24.7 million and $ 20.1 million at December 31, 2022 and 2021, respectively and are included in other assets on the consolidated balance sheet. The Company recognized tax credits and other tax benefits of $ 6.4 mi llion, $ 6.5 million and $ 5.6 million in 2022, 2021 and 2020, respectively and amortization expense of $ 5.1 million, $ 5.5 million and $ 4.6 million in 2022, 2021 and 2020, respectively resulting from LIHTC investments. Additional contributions are committed during the investment periods through the ye ar 2034. Unfunded commitments to these investments as of December 31, 2022 tot aled $ 22.3 mil lion. New Market Tax Credit Investments The Company also invests in active low-income community businesses that qualify for New Market Tax Credits (NMTC). NMTC investments are made through Community Development Entities (CDE) and such entities are qualified through the US Department of the Treasury. NMTCs are earned for a qualified entity investment made by a taxpayer in CDEs if substantially all of the investment is used by the CDE to make qualified investments. It is through its equity contributions into the CDE entities that the Company is able to receive the benefits of the NMTCs. The amount of the NMTC is equal to 39 % of the qualified investment taken over a seven year period. The investments are amortized through other noninterest expense using the effective yield method as related tax credits are utilized. The Company does not consolidate these CDEs as variable interest entities due to the control the allocatee of the tax credits has over the entity. Total NMTC investments were $ 11.3 million and $ 15.2 million at December 31, 2022 and 2021, respectively and are included in other assets on the consolidated balance sheet. The Company recognized tax cred its of $ 4.7 m illion, $ 4.0 million and $ 4.0 million in 2022, 2021 and 2020, respectively and amortization expe nse of $ 3.9 m illion, $ 3.3 million, and $ 3.3 million in 2022, 2021 and 2020 , respectively resulting from NMTC investments. NMTC investments are funded in full in the year they begin. There are no unfunded commitments.

Intangible Assets and Goodwill

Intangible Assets and Goodwill	12 Months Ended
	Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets and Goodwill	(7) INTANGIBLE ASSETS AND GOODWILL The following is a summary of intangible assets: Gross Accumulated Net (Dollars in thousands) As of December 31, 2022 Core deposit intangibles $ 33,298 $ ( 13,615 ) $ 19,683 Customer relationship intangibles 3,350 ( 3,050 ) 300 Total $ 36,648 $ ( 16,665 ) $ 19,983 As of December 31, 2021 Core deposit intangibles $ 27,433 $ ( 10,311 ) $ 17,122 Customer relationship intangibles 3,350 ( 2,906 ) 444 Total $ 30,783 $ ( 13,217 ) $ 17,566 Estimated amortization of intangible assets for the next five years, as of December 31, 2022, is as follows (dollars in thousands): Estimated Amortization 2023 $ 3,449 2024 3,449 2025 3,223 2026 2,620 2027 2,616 At December 31, 2022 , the weighted-average remaining life of all intangible assets was approximately 6.6 years, which consisted of customer relationship intangibles with a weighted-average life of 2.6 years and core deposit intangibles with a weighted-average life of 6.7 years. The following is a summary of goodwill by business segment: Other Executive, Metropolitan Community Financial Operations Banks Banks Pegasus Worthington Services & Support Consolidated (Dollars in thousands) Year Ended December 31, 2022 Balance at beginning of period $ 13,767 $ 61,212 $ 68,855 $ — $ 5,464 $ 624 $ 149,922 Acquisitions — — — 32,133 — — 32,133 Balance at end of period $ 13,767 $ 61,212 $ 68,855 $ 32,133 $ 5,464 $ 624 $ 182,055 Year Ended December 31, 2021 Balance at beginning and end of period $ 13,767 $ 61,212 $ 68,855 $ — $ 5,464 $ 624 $ 149,922 The Company acquired Worthington on February 8, 2022, which added core deposit intangibles and goodwill shown in the tables above. See Note (2) of the Notes to Consolidated Financial Statements for disclosure regarding the Company’s recent developments, including mergers and acquisitions.

Time Deposits

Time Deposits	12 Months Ended
	Dec. 31, 2022
Deposits [Abstract]
Time Deposits	(8) TIME DEPOSITS Time deposits include certificates of deposit and individual retirement accounts. At December 31, 2022, the scheduled maturities of all time deposits are as follows (Dollars in thousands): 2023 $ 553,052 2024 84,859 2025 33,509 2026 21,591 2027 19,902 Thereafter 141 Total $ 713,054 The following table is a summary of time deposits that meet or exceed the current Federal Deposit Insurance Corporation ("FDIC") insurance limit for the periods presented: December 31, 2022 2021 (Dollars in thousands) Time deposits of $250,000 or more $ 224,517 $ 150,393

Short-Term Borrowings

Short-Term Borrowings	12 Months Ended
	Dec. 31, 2022
Short-Term Debt [Abstract]
Short-Term Borrowings	(9) SHORT-TERM BORROWINGS The following is a summary of short-term borrowings: December 31, 2022 2021 (Dollars in thousands) Federal funds purchased $ 300 $ — Weighted average interest rate 1.39 % 0.08 % End of period interest rate 4.30 % 0.10 % Federal funds purchased represent borrowings of overnight funds from other financial institutions.

Line of Credit

Line of Credit	12 Months Ended
	Dec. 31, 2022
Debt Disclosure [Abstract]
Line of Credit	(10) LINES OF CREDIT BancFirst has a line of credit from the FHLB of Topeka, Kansas to use for liquidity or to match-fund certain long-term fixed rate loans. BancFirst's assets, including residential first mortgages of $ 938.8 million, are pledged as collateral for the borrowings under the line of credit. As of December 31, 2022 , BancFirst had the ability to draw up to $ 741.8 million on the FHLB line of credit based on FHLB stock holdings of $ 655,500 with no advances outstanding. In addition, BancFirst has a $ 25.0 million line of credit with another financial institution that is an overnight federal funds facility. As of December 31, 2022, BancFirst had no advances outstanding under either line of credit. Pegasus has a $ 20.0 million line of credit with another financial institution that is an overnight federal funds facility. As of December 31, 2022, Pegasus had no advances outstanding under its line of credit. Worthington has a $ 3.0 million line of credit and a $ 5.5 million line of credit from two other financial institutions. Both serve as overnight federal funds facilities. Worthington also has a line of credit from the FHLB of Dallas, Texas to use for liquidity or to match-fund certain long-term fixed rate loans. Worthington had no advances outstanding as of December 31, 2022 under either line of credit.

Subordinated Debt

Subordinated Debt	12 Months Ended
	Dec. 31, 2022
Broker-Dealer [Abstract]
Subordinated Debt	(11) SUBORDINATED DEBT In January 2004, the Company established BFC Capital Trust II (“BFC II”), a trust formed under the Delaware Business Trust Act. The Company owns all of the common securities of BFC II. In February 2004, BFC II issued $ 25 million of aggregate liquidation amount of 7.20 % Cumulative Trust Preferred Securities (the “Cumulative Trust Preferred Securities”) to other investors. In March 2004, BFC II issued an additional $ 1 million in Cumulative Trust Preferred Securities through the execution of an over-allotment option. The proceeds from the sale of the Cumulative Trust Preferred Securities and the common securities of BFC II were invested in $ 26.8 million of 7.20 % Junior Subordinated Debentures of the Company. Interest payments on the $ 26.8 million of 7.20 % Junior Subordinated Debentures are payable January 15, April 15, July 15 and October 15 of each year. Such interest payments may be deferred for up to twenty consecutive quarters. The stated maturity date of the $ 26.8 million of 7.20 % Junior Subordinated Debentures is March 31, 2034 , but they are subject to mandatory redemption pursuant to optional prepayment terms. The Cumulative Trust Preferred Securities represent an undivided interest in the $ 26.8 million of 7.20 % Junior Subordinated Debentures and are guaranteed by the Company. During any deferral period or during any event of default, the Company may not declare or pay any dividends on any of its capital stock. The Cumulative Trust Preferred Securities were callable at par, in whole or in part, after March 31, 2009. On June 17, 2021, the Company completed a private placement, under Regulation D of the Securities Act of 1933, of $ 60 million aggregate principal amount of 3.50 % Fixed-to-Floating Rate Subordinated Notes due 2036 (the “Subordinated Notes”) to various institutional accredited investors. The sale of the Subordinated Notes was pursuant to a Subordinated Note Purchase Agreement entered into with each of the investors. The Subordinated Notes have been structured to qualify as Tier 2 capital under bank regulatory guidelines. The net proceeds to the Company from the sale of the Subordinated Notes were $ 59.15 million after deducting commissions and offering expenses of $ 850,000 . The Company used the proceeds from the sale of the Subordinated Notes for general corporate purposes. The Subordinated Notes will initially bear interest at a fixed rate of 3.50 % per annum, from and including June 17, 2021 to but excluding June 30, 2031, payable semi-annually in arrears on June 30 and December 31 of each year , commencing December 31, 2021 . Then, from and including June 30, 2031, to but excluding the maturity date, the Subordinated Notes will bear interest at a floating rate equal to the benchmark (initially, three-month term SOFR), reset quarterly, plus a spread of 229 basis points, payable quarterly in arrears on March 31, June 30, September 30 and December 31 of each year . The Subordinated Notes mature on June 30, 2036 . The Company may, at its option, beginning with the interest payment date of June 30, 2031, and on any scheduled interest payment date thereafter, redeem the Subordinated Notes, in whole or in part. In addition, t he Company may redeem all, but not less than all, of the Subordinated Notes at any time upon the occurrence of a “Tier 2 Capital Event,” a “Tax Event” or an “Investment Company Event” (each as defined in the Subordinated Notes). Any such redemption is subject to obtaining the prior approval of the Board of Governors of the Federal Reserve System (or its designee). The redemption price with respect to any such redemption will be equal to 100 % of the principal amount of the Subordinated Note, or portion thereof, to be redeemed, plus accrued but unpaid interest, if any, thereon to, but excluding, the redemption date.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Income Taxes	(12) INCOME TAXES The components of the Company’s income tax expense (benefit) are as follows: Year Ended December 31, 2022 2021 2020 (Dollars in thousands) Current taxes: Federal $ 39,197 $ 28,359 $ 25,974 State 4,813 5,365 7,443 Deferred taxes 322 7,044 ( 9,491 ) Total income taxes $ 44,332 $ 40,768 $ 23,926 Income tax (benefit) expense applicable to securities transactions approximated $ 453,000 , $ 220,000 and $( 82,000 ) for the years ended December 31, 2022, 2021 and 2020, respectively. A reconciliation of tax expense at the federal statutory tax rate applied to income before taxes is presented in the following table. The federal statutory tax rate was 21 % in 2022, 2021 and 2020: Year Ended December 31, 2022 2021 2020 (Dollars in thousands) Tax expense at the federal statutory tax rate $ 49,861 $ 43,764 $ 25,937 Increase (decrease) in tax expense from: Tax-exempt income, net ( 337 ) ( 436 ) ( 507 ) Modified endowment life contracts ( 487 ) ( 501 ) ( 508 ) Share based compensation excess tax benefit ( 2,905 ) ( 1,643 ) ( 412 ) Tax deductible dividends paid on ESOP ( 481 ) ( 490 ) ( 453 ) State tax expense, net of federal tax benefit 3,788 4,779 5,606 Bargain purchase gain — ( 1,007 ) — Utilization of tax credits: New markets tax credits, net of tax expense ( 3,745 ) ( 3,192 ) ( 3,121 ) Low-income housing tax credits, net of amortization ( 1,024 ) ( 1,533 ) ( 1,273 ) Other tax credits ( 91 ) ( 379 ) ( 320 ) Other, net ( 247 ) 1,406 ( 1,023 ) Total tax expense $ 44,332 $ 40,768 $ 23,926 The net deferred tax asset consisted of the following and is reported in other assets: December 31, 2022 2021 (Dollars in thousands) Unrealized net losses on securities $ 22,107 $ — Provision for credit losses 20,988 17,654 Write-downs of other real estate owned 938 255 Deferred compensation 2,142 2,320 Stock-based compensation 1,643 1,575 Investments in partnership interests 6,056 3,840 Other 1,123 901 Gross deferred tax assets 54,997 26,545 Unrealized net gains on securities — ( 684 ) Premium on securities of banks acquired ( 98 ) ( 120 ) Intangibles ( 6,346 ) ( 5,756 ) Basis difference related to tax credits ( 4,118 ) ( 2,979 ) Depreciation ( 20,360 ) ( 14,545 ) Prepaid expense deducted ( 1,139 ) ( 1,120 ) Other ( 185 ) ( 169 ) Gross deferred tax liabilities ( 32,246 ) ( 25,373 ) Net deferred tax asset $ 22,751 $ 1,172 The Company recognizes accrued interest and penalties related to unrecognized tax benefits, if applicable, in income tax expense. During the years ended December 31, 2022, 2021 and 2020 , the Company did no t recognize or accrue any interest and penalties related to unrecognized tax benefits. Federal and various state income tax statutes dictate that tax returns filed in any of the previous three reporting periods remain open to examination, which includes tax return years 2019 to 2021 . In addition, the 2018 return was amended and therefore will remain open through 2023 . The Company has no open examinations with either the Internal Revenue Service or any state agency. Management performs an analysis of the Company’s tax position annually and believes it is more likely than not that all of its tax positions will be utilized in future years.

Stock-Based Compensation

Stock-Based Compensation	12 Months Ended
	Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]
Stock-Based Compensation	(13) STOCK-BASED COMPENSATION The Company has had a nonqualified incentive stock option plan, the BancFirst Corporation Stock Option Plan (the “Employee Plan”), since May 1986. At December 31, 2022 , there were 35,000 shares available for future grants. The Employee Plan will terminate on December 31, 2024 , if not extended. The options vest and are exercisable beginning four years from the date of grant at the rate of 25 % per year for four years . Options expire no later than the end of fifteen years from the date of grant. The option price must be no less than 100 % of the fair value of the stock relating to such option at the date of grant. The Company has had the BancFirst Corporation Non-Employee Directors’ Stock Option Plan (the “Non-Employee Directors’ Plan”) since June 1999. Each non-employee director is granted an option for 10,000 shares. At December 31, 2022 , there were 45,000 shares available for future grants. The Non-Employee Directors’ Plan will terminate on December 31, 2024 , if not extended. The options vest and are exercisable beginning one year from the date of grant at the rate of 25 % per year for four years , and expire no later than the end of fifteen years from the date of grant. The option price must be no less than 100 % of the fair value of the stock relating to such option at the date of grant. The Company currently uses newly issued shares for stock option exercises, but reserves the right to use shares purchased under the Company’s Stock Repurchase Program (the “SRP”) in the future. Although not required or expected, the Company may settle some options in cash on a limited basis at the discretion of the Company. During the year ended December 31, 2022, the Company did no t settle any options for cash. During the year ended December 31, 2021, the Company had cash settlements for 121,330 shares for a total net cash settlement of options of $ 5.5 million that did not increase the outstanding shares of the Company. T he following table is a summary of the activity under both the Employee Plan and the Non-Employee Directors’ Plan: Wgtd. Avg. Wgtd. Avg. Remaining Aggregate Exercise Contractual Intrinsic Options Price Term Value (Dollars in thousands, except option data) Year Ended December 31, 2022 Outstanding at December 31, 2021 1,303,250 $ 40.90 Options granted 278,500 87.13 Options exercised ( 241,460 ) 28.06 Options canceled, forfeited, or expired ( 30,000 ) 66.31 Outstanding at December 31, 2022 1,310,290 52.51 8.73 Yrs $ 46,741 Exercisable at December 31, 2022 489,540 30.82 6.80 Yrs $ 28,082 Year Ended December 31, 2021 Outstanding at December 31, 2020 1,343,080 $ 35.28 Options granted 179,500 62.13 Options exercised ( 214,330 ) 23.40 Options canceled, forfeited, or expired ( 5,000 ) 44.23 Outstanding at December 31, 2021 1,303,250 40.90 8.40 Yrs $ 38,656 Exercisable at December 31, 2021 614,875 28.03 7.15 Yrs $ 26,153 The following table has additional information regarding options exercised under both the Employee Plan and the Non-Employee Directors’ Plan: Year Ended December 31, 2022 2021 2020 (Dollars in thousands) Total intrinsic value of options exercised $ 14,837 $ 9,264 $ 2,315 Cash received from options exercised 6,776 5,015 1,574 Tax benefit realized from options exercised 3,567 2,360 590 The fair value of each option grant is estimated on the date of grant using the Black-Scholes option-pricing model and is based on certain assumptions including risk-free rate of return, dividend yield, stock price volatility and the expected term. The fair value of each option is expensed over its vesting period. The following table is a summary of the Company’s recorded stock-based compensation expense: Year Ended December 31, 2022 2021 2020 (Dollars in thousands) Stock-based compensation expense $ 1,941 $ 2,133 $ 1,516 Tax benefit 467 513 386 Stock-based compensation expense, net of tax $ 1,474 $ 1,620 $ 1,130 The Company will continue to amortize the unearned stock-based compensation expense over the remaining vesting period of approximately seven years . The following table shows the unearned stock-based compensation expense: December 31, 2022 (Dollars in thousands) Unearned stock-based compensation expense $ 13,200 T he following table shows the assumptions used for computing stock-based compensation expense under the fair value method on options granted during the periods presented: Year Ended December 31, 2022 2021 2020 Weighted average grant-date fair value per share of options granted $ 31.90 $ 21.16 $ 10.85 Risk-free interest rate 1.75 to 4.17 % 1.30 to 1.74 % 0.64 to 1.13 % Dividend yield 2.00 % 2.00 % 2.00 % Stock price volatility 34.61 to 35.60 % 35.55 to 36.39 % 22.84 to 36.1 % Expected term 10 Yrs 10 Yrs 10 Yrs The risk-free interest rate is determined by reference to the spot zero-coupon rate for the U.S. Treasury security with a maturity similar to the expected term of the options. The dividend yield is the expected yield for the expected term. The stock price volatility is estimated from the recent historical volatility of the Company’s stock. The expected term is estimated from the historical option exercise experience. The Company accounts for forfeitures as they occur. The Company has had the BancFirst Corporation Directors’ Deferred Stock Compensation Plan (the “Deferred Stock Compensation Plan”) since May 1999. As of December 31, 2022 , there are 26,288 shares available for future issuance under the Deferred Stock Compensation Plan. The Deferred Stock Compensation Plan will terminate on December 31, 2024 , if not extended. Under the plan, directors and members of the community advisory boards of the Company and its subsidiaries may defer up to 100 % of their board fees. They are credited for each deferral with a number of stock units based on the current market price of the Company’s stock, which accumulate in an account until the director or community board member terminates serving as a board member. Shares of common stock of the Company are then distributed to the terminating director or community board member based upon the number of stock units accumulated in his or her account. There were 30,982 and 5,400 shares of common stock distributed from the Deferred Stock Compensation Plan during the years ended December 31, 2022 and 2021, respectively. A summary of the accumulated stock units is as follows: December 31, 2022 2021 Accumulated stock units 129,609 152,754 Average price $ 34.91 $ 30.86

Retirement Plans

Retirement Plans	12 Months Ended
	Dec. 31, 2022
Retirement Benefits [Abstract]
Retirement Plans	(14) RETIREMENT PLANS Since January 1, 2009, the Company has had two separate retirement plans. The Thrift Plan (“401(k)”) and Employee Stock Ownership Plan (“ESOP”) cover all eligible employees, as defined in the plans, of the Company and its subsidiaries. The 401(k) allows employees to defer up to the maximum legal limit of their compensation, of which the Company may match up to 3 % of their compensation. In addition, the Company may make discretionary contributions based on employee contributions or eligible compensation to the ESOP, as determined by the Company’s Board of Directors. The ESOP sponsor purchases shares from the open market. These shares are included in the calculation of the basic earnings per share. Dividends issued on these shares are reinvested into the ESOP. The ESOP is not leveraged. The aggregate amounts of contributions by the Company to the 401(k) and ESOP are shown in the following table: December 31, 2022 2021 2020 (Dollars in thousands) 401(k) contributions $ 3,011 $ 2,856 $ 2,986 ESOP contributions 4,807 4,317 3,689 Total contributions $ 7,818 $ 7,173 $ 6,675

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2022
Equity [Abstract]
Stockholders' Equity	(15) STOCKHOLDERS’ EQUITY As of December 31, 2022, 2021 and 2020 the Company’s authorized and outstanding preferred and common stock was as follows: No. of Shares Outstanding at December 31, Class of Stock No. of Shares 2022 2021 2020 Par Value Dividends Voting Rights Senior Preferred 10,000,000 — — — $ 1.00 As declared Voting 10% Cumulative Preferred 900,000 — — — 5.00 As declared Non-voting Common 40,000,000 32,875,560 32,603,118 32,719,852 1.00 As declared Voting The following is a description of the capital stock of the Company: (a) Senior Preferred Stock: No shares issued or outstanding. Shares may be issued with such voting, dividend, redemption, sinking fund, conversion, exchange, liquidation and other rights as shall be determined by the Company’s Board of Directors, without approval of the stockholders. The Senior Preferred Stock would have a preference over common stock as to payment of dividends, as to the right to distribution of assets upon redemption of such shares or upon liquidation of the Company. (b) 10% Cumulative Preferred Stock: Redeemable at the Company’s option at $ 5.00 per share plus accumulated dividends; non-voting; cumulative dividends at the rate of 10 % payable semi-annually on January 15 and July 15; no shares issued or outstanding. (c) Common stock: At December 31, 2022, 2021 and 2020 the shares issued equaled shares outstanding. In November 1999, the Company adopted a Stock Repurchase Program (the “SRP”). The SRP may be used as a means to increase earnings per share and return on equity, to purchase treasury stock for the exercise of stock options or for distributions under the Deferred Stock Compensation Plan, to provide liquidity for optionees to dispose of stock from exercises of their stock options, and to provide liquidity for stockholders wishing to sell their stock. All shares repurchased under the SRP have been retired and not held as treasury stock. The timing, price and amount of stock repurchases under the SRP may be determined by management and approved by the Company’s Executive Committee. During September 2021, the SRP was amended to permit the repurchase of an additional 650,000 shares. The following table is a summary of the shares under the program: Year Ended December 31, 2022 2021 2020 Number of shares repurchased — 212,296 59,284 Average price of shares repurchased $ — $ 54.94 $ 52.26 Shares remaining to be repurchased 500,486 500,486 62,782 The Company’s ability to pay dividends is dependent upon dividend payments received from BancFirst. Banking regulations limit bank dividends based upon net earnings retained and minimum capital requirements. Dividends in excess of these requirements require regulatory approval. At January 1, 2023, approximately $ 185.1 million of the equity of BancFirst was available for dividend payments to the Company. During any deferral period or any event of default on the Junior Subordinated Debentures, the Company may not declare or pay any dividends on any of its capital stock. BancFirst Corporation, BancFirst, Pegasus and Worthington are subject to risk-based capital guidelines issued by the Board of Governors of the Federal Reserve System and the FDIC. These guidelines are used to evaluate capital adequacy and involve both quantitative and qualitative evaluations of BancFirst Corporation’s, BancFirst’s, Pegasus’s and Worthington's assets, liabilities, and certain off-balance-sheet items calculated under regulatory practices. Failure to meet the minimum capital requirements can initiate certain mandatory or discretionary actions by the regulatory agencies that could have a direct material effect on the Company’s consolidated financial statements. The Company believes that as of December 31, 2022, BancFirst Corporation, BancFirst, Pegasus and Worthington met all capital adequacy requirements to which they are subject. The actual and required capital amounts and ratios are shown in the following table: Actual Required For Capital Adequacy Purposes With Capital Conservation Buffer To Be Well Capitalized Under Prompt Corrective Action Provisions Amount Ratio Amount Ratio Amount Ratio Amount Ratio (Dollars in thousands) As of December 31, 2022: Total Capital (to Risk Weighted Assets)- BancFirst Corporation $ 1,298,329 16.61 % $ 625,387 8.00 % $ 820,821 10.50 % N/A N/A BancFirst 1,092,098 16.68 % 523,932 8.00 % 687,661 10.50 % $ 654,916 10.00 % Pegasus 117,445 12.91 % 77,802 8.00 % 95,553 10.50 % 91,003 10.00 % Worthington 47,554 14.09 % 27,006 8.00 % 35,446 10.50 % 33,758 10.00 % Common Equity Tier 1 Capital (to Risk Weighted Assets)- BancFirst Corporation $ 1,120,361 14.33 % $ 351,780 4.50 % $ 547,214 7.00 % N/A N/A BancFirst 991,050 15.13 % 294,712 4.50 % 458,441 7.00 % $ 425,695 6.50 % Pegasus 108,437 11.92 % 40,951 4.50 % 63,702 7.00 % 59,152 6.50 % Worthington 44,207 13.10 % 15,191 4.50 % 23,631 7.00 % 21,943 6.50 % Tier 1 Capital (to Risk Weighted Assets)- BancFirst Corporation $ 1,146,361 14.66 % $ 469,041 6.00 % $ 664,474 8.50 % N/A N/A BancFirst 1,011,050 15.44 % 392,949 6.00 % 556,678 8.50 % $ 523,932 8.00 % Pegasus 108,437 11.92 % 54,602 6.00 % 77,352 8.50 % 72,802 8.00 % Worthington 44,207 13.10 % 20,255 6.00 % 28,694 8.50 % 27,006 8.00 % Tier 1 Capital (to Total Assets)- BancFirst Corporation $ 1,146,361 9.30 % $ 493,191 4.00 % N/A N/A N/A N/A BancFirst 1,011,050 9.72 % 416,004 4.00 % N/A N/A $ 520,005 5.00 % Pegasus 108,437 8.00 % 54,238 4.00 % N/A N/A 67,798 5.00 % Worthington 44,207 8.53 % 20,738 4.00 % N/A N/A 25,922 5.00 % As of December 31, 2021: Total Capital (to Risk Weighted Assets)- BancFirst Corporation $ 1,171,215 17.30 % $ 541,493 8.00 % $ 710,709 10.50 % N/A N/A BancFirst 1,004,835 16.75 % 479,883 8.00 % 629,847 10.50 % $ 599,854 10.00 % Pegasus 88,224 11.62 % 60,765 8.00 % 79,754 10.50 % 75,956 10.00 % Common Equity Tier 1 Capital (to Risk Weighted Assets)- BancFirst Corporation $ 1,002,096 14.80 % $ 304,590 4.50 % $ 473,806 7.00 % N/A N/A BancFirst 909,817 15.17 % 269,934 4.50 % 419,898 7.00 % $ 389,905 6.50 % Pegasus 82,056 10.80 % 34,180 4.50 % 53,170 7.00 % 49,372 6.50 % Tier 1 Capital (to Risk Weighted Assets)- BancFirst Corporation $ 1,028,096 15.19 % $ 406,120 6.00 % $ 575,336 8.50 % N/A N/A BancFirst 929,817 15.50 % 359,913 6.00 % 509,876 8.50 % $ 479,883 8.00 % Pegasus 82,056 10.80 % 45,574 6.00 % 64,563 8.50 % 60,765 8.00 % Tier 1 Capital (to Total Assets)- BancFirst Corporation $ 1,028,096 9.14 % $ 449,847 4.00 % N/A N/A N/A N/A BancFirst 929,817 9.22 % 403,460 4.00 % N/A N/A $ 504,325 5.00 % Pegasus 82,056 6.98 % 47,054 4.00 % N/A N/A 58,817 5.00 % As of December 31, 2022, the most recent notifications from the Federal Reserve Bank of Kansas City and the FDIC categorized BancFirst, Pegasus and Worthington as “well capitalized” under the prompt corrective action provisions. The Common Equity Tier 1 Capital of BancFirst Corporation, BancFirst, Pegasus and Worthington includes common stock and related paid-in capital and retained earnings. In connection with the adoption of the Basel III Capital Rules, the election was made to opt-out of the requirement to include most components of accumulated other comprehensive income in Common Equity Tier 1 Capital. Common Equity Tier 1 Capital for BancFirst Corporation, BancFirst, Pegasus and Worthington is reduced by goodwill and other intangible assets, net of associated deferred tax liabilities. The Company’s trust preferred securities have continued to be included in Tier 1 capital, as the Company’s total assets do not exceed $ 15 billion. There are no conditions or events since the most recent notifications to BancFirst Corporation, BancFirst, Pegasus and Worthington of their capital category that management believes would materially change their category under capital requirements existing as of the report date. On June 17, 2021, the Company completed a private placement, under Regulation D of the Securities Act of 1933, of $ 60 million aggregate principal amount of Subordinated Notes. The Subordinated Notes have been structured to qualify as Tier 2 capital under bank regulatory guidelines. In April 2020, the Company began originating loans to qualified small businesses under the PPP administered by the SBA. Federal bank regulatory agencies have issued an interim final rule that permits banks to neutralize the regulatory capital effects of participating in the Paycheck Protection Program Lending Facility (the “PPP Facility”) and clarify that PPP loans have a zero percent risk weight under applicable risk-based capital rules. Specifically, a bank may exclude all PPP loans pledged as collateral to the PPP Facility from its average total consolidated assets for the purposes of calculating its leverage ratio, while PPP loans that are not pledged as collateral to the PPP Facility are included. The PPP loans the Company originated in 2021 and 2020 are included in the calculation of the Company’s leverage ratio as of December 31, 2022 and December 31, 2021 as the Company did not utilize the PPP Facility for funding purposes. In connection with the adoption of ASC 326 , the Company recognized an after-tax cumulative effect reduction to retained earnings totaling $ 2.3 million in 2020. In February 2019, the federal bank regulatory agencies issued a final rule (the “2019 CECL Rule”) that revised certain capital regulations to account for changes to credit loss accounting under U.S. GAAP. The 2019 CECL Rule included a transition option that allows banking organizations to phase in, over a three-year period, the day-one adverse effects of CECL on their regulatory capital ratios (three-year transition option). In March 2020, the federal bank regulatory agencies issued an interim final rule that maintained the three-year transition option of the 2019 CECL Rule and also provided banking organizations that were required under U.S. GAAP (as of January 2020) to implement CECL before the end of 2020 the option to delay for two years an estimate of the effect of CECL on regulatory capital, relative to the incurred loss methodology’s effect on regulatory capital, followed by a three-year transition period (five-year transition option). The Company elected not to adopt the five-year transition option.

Net Income Per Common Share

Net Income Per Common Share	12 Months Ended
	Dec. 31, 2022
Earnings Per Share [Abstract]
Net Income Per Common Share	(16) NET INCOME PER COMMON SHARE Basic and diluted net income per common share are calculated as follows: Income Shares Per Share (Dollars in thousands, except per share data) Year Ended December 31, 2022 Basic Income available to common stockholders $ 193,100 32,778,355 $ 5.89 Dilutive effect of stock options — 661,141 Diluted Income available to common stockholders plus assumed exercises of stock options $ 193,100 33,439,496 $ 5.77 Year Ended December 31, 2021 Basic Income available to common stockholders $ 167,630 32,716,099 $ 5.12 Dilutive effect of stock options — 598,047 Diluted Income available to common stockholders plus assumed exercises of stock options $ 167,630 33,314,146 $ 5.03 Year Ended December 31, 2020 Basic Income available to common stockholders $ 99,586 32,672,522 $ 3.05 Dilutive effect of stock options — 538,430 Diluted Income available to common stockholders plus assumed exercises of stock options $ 99,586 33,210,952 $ 3.00 The following table shows the number and average exercise price of options that were excluded from the computation of diluted net income per common share for each year because the options were anti-dilutive for the period. Shares Average Price December 31, 2022 155,316 $ 83.79 December 31, 2021 189,780 60.33 December 31, 2020 402,575 52.72

Condensed Parent Company Financ

Condensed Parent Company Financial Statements	12 Months Ended
	Dec. 31, 2022
Condensed Financial Information Disclosure [Abstract]
Condensed Parent Company Financial Statements	(17) CONDENSED PARENT COMPANY FINANCIAL STATEMENTS BALANCE SHEETS December 31, 2022 2021 (Dollars in thousands) ASSETS Cash $ 17,806 $ 62,007 Investments in subsidiaries 1,206,246 1,117,622 Goodwill 101,611 69,478 Core deposit premium 12,009 7,627 Dividends receivable 15,682 13,426 Other assets 1,731 1,515 Total assets $ 1,355,085 $ 1,271,675 LIABILITIES AND STOCKHOLDERS’ EQUITY Other liabilities $ 18,205 $ 13,954 Subordinated debt 86,044 85,987 Stockholders’ equity 1,250,836 1,171,734 Total liabilities and stockholders’ equity $ 1,355,085 $ 1,271,675 STATEMENTS OF INCOME Year Ended December 31, 2022 2021 2020 (Dollars in thousands) OPERATING INCOME Dividends from subsidiaries $ 93,139 $ 54,480 $ 50,872 Interest on interest-bearing deposits 94 41 1 Other 1,338 1,071 886 Total operating income 94,571 55,592 51,759 OPERATING EXPENSE Interest 4,122 3,130 1,965 Other 7,190 3,340 3,317 Total operating expense 11,312 6,470 5,282 Income before taxes and equity in undistributed earnings of subsidiaries 83,259 49,122 46,477 Allocated income tax benefit 5,857 4,191 2,610 Income before equity in undistributed earnings of subsidiaries 89,116 53,313 49,087 Equity in undistributed earnings of subsidiaries 105,817 116,365 51,955 Amortization of stock-based compensation arrangements of subsidiaries ( 1,833 ) ( 2,048 ) ( 1,456 ) Net income $ 193,100 $ 167,630 $ 99,586 STATEMENTS OF CASH FLOW Year Ended December 31, 2022 2021 2020 (Dollars in thousands) CASH FLOWS FROM OPERATING ACTIVITIES Net income $ 193,100 $ 167,630 $ 99,586 Adjustments to reconcile to net cash provided by operating activities: Equity in undistributed earnings of subsidiaries ( 105,817 ) ( 116,365 ) ( 51,955 ) Amortization of stock-based compensation arrangements of subsidiaries 1,833 2,048 1,456 Other, net 3,815 5,056 188 Net cash provided by operating activities 92,931 58,369 49,275 INVESTING ACTIVITIES Payments for investments in subsidiaries ( 94,967 ) ( 9,000 ) ( 1,000 ) Other, net ( 1,352 ) 4,429 ( 1,175 ) Net cash used in investing activities ( 96,319 ) ( 4,571 ) ( 2,175 ) FINANCING ACTIVITIES Issuance of common stock 7,649 2,260 1,790 Common stock acquired — ( 11,663 ) ( 3,098 ) Net cash settlement of options — ( 5,479 ) — Cash dividends paid ( 48,462 ) ( 45,140 ) ( 42,472 ) Proceeds from the issuance of subordinated notes, net of debt issuance costs — 59,150 — Net cash used in financing activities ( 40,813 ) ( 872 ) ( 43,780 ) Net (decrease) increase in cash and due from banks ( 44,201 ) 52,926 3,320 Cash and due from banks at the beginning of the period 62,007 9,081 5,761 Cash and due from banks at the end of the period $ 17,806 $ 62,007 $ 9,081 SUPPLEMENTAL DISCLOSURE Cash paid during the period for interest $ 4,122 $ 3,130 $ 1,966 Cash received during the period for income taxes, net $ 6,667 $ 4,411 $ 2,812

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2022
Related Party Transactions [Abstract]
Related Party Transactions	(18) RELATED PARTY TRANSACTIONS Refer to Note (5) for information regarding loan transactions with related parties.

Commitments and Contingent Liab

Commitments and Contingent Liabilities	12 Months Ended
	Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingent Liabilities	(19) COMMITMENTS AND CONTINGENT LIABILITIES 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. These financial instruments include loan commitments and standby letters of credit, which involve elements of credit and interest rate risk to varying degrees. The Company’s exposure to credit loss in the event of nonperformance by the other party to the instrument is represented by the instrument’s contractual amount. To control this credit risk, the Company uses the same underwriting standards as it uses for loans recorded on the consolidated balance sheet. The amounts of financial instruments with off-balance-sheet risk are as follows: December 31, 2022 2021 (Dollars in thousands) Loan commitments $ 2,627,552 $ 2,084,706 Stand-by letters of credit 72,237 82,841 Loan commitments are agreements to lend to a customer, as long as there is no violation of any condition established in the contract. Stand-by letters of credit are conditional commitments issued by the Company to guarantee the performance of a customer to a third party. These instruments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the instruments are expected to expire without being drawn upon, the total amounts do not necessarily represent commitments that will be funded in the future. The Company is a defendant in legal actions arising from normal business activities. Management believes that all legal actions against the Company are without merit or that the ultimate liability, if any, resulting from them will not materially affect the Company’s consolidated financial statements.

Leases

Leases	12 Months Ended
	Dec. 31, 2022
Leases [Abstract]
Leases	(20) LEASES Lessee The Company has operating leases, which primarily consist of office space in buildings, ATM locations, storage facilities, parking lots, equipment and land on which it owns certain buildings. Rental expense on all operating leases, including those rented on a monthly or temporary basis were as follows (Dollars in thousands): Year Ending December 31: 2022 $ 1,865 2021 1,560 2020 1,894 A right of use lease asset included in accrued interest receivable and other assets on the consolidated balance sheet totaled $ 5.6 million at December 31, 2022 compared to $ 5.0 million at December 31, 2021 , and a related lease liability included in accrued interest payable and other liabilities on the consolidated balance sheet totaled $ 5.4 million at December 31, 2022 compared to $ 4.9 million at December 31, 2021. As of December 31, 2022 , our operating leases have a weighted-average remaining lease term of 3.6 years and a weighted-average discount rate of 2.3 percent. Maturity of Operating Lease Liabilities The following table presents minimum future commitments by year for the Company’s operating leases. Such commitments are reflected as undiscounted values and are reconciled to the discounted present value recognized on the consolidated balance sheet. December 31, 2022 (Dollars in thousands) 2023 $ 1,716 2024 1,358 2025 1,097 2026 696 2027 341 Thereafter 1,011 Total lease payments 6,219 Less imputed interest ( 794 ) Operating lease liability $ 5,425 Lessor The Company is a lessor of operating leases, which primarily consist of office space in buildings and parking lots. These assets are classified on the consolidated balance sheet as premises and equipment. The Company had operating lease revenue of $ 5.4 million, $ 4.9 million and $ 5.3 million for the years ended December 31, 2022, 2021 and 2020 , respectively. Lease revenue is included in occupancy, net on the consolidated statement of comprehensive income. Future Minimum Lease Payments to be received The Company does not have operating leases that extend beyond 2031. The following table presents the scheduled minimum future contractual rent to be received under the remaining non-cancelable term of the operating leases: December 31, 2022 (Dollars in thousands) 2023 $ 3,137 2024 2,874 2025 2,154 2026 1,778 2027 1,350 2028-2031 2,197 Total future minimum lease payments $ 13,490

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2022
Fair Value Disclosures [Abstract]
Fair Value Measurements	(21) FAIR VALUE MEASUREMENTS Accounting standards define fair value as the price that would be received to sell an asset or the price paid to transfer a liability in the principal or most advantageous market available to the entity in an orderly transaction between market participants on the measurement date. FASB Accounting Standards Codification (“ASC”) Topic 820 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 to the valuation methodology are quoted prices (unadjusted) for identical assets or liabilities in active markets. • Level 2 Inputs to the valuation methodology include quoted prices for similar assets and liabilities in active markets, and inputs that are observable for the asset and liability, either directly or indirectly, for substantially the full term of the financial instrument. • Level 3 Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Level 3 assets and liabilities include financial instruments whose values are determined using pricing models, discounted cash flow methodologies, or similar techniques, as well as instruments for which the determination of fair value requires significant management judgment or estimation. This category includes certain collaterally dependent loans, impaired loans, repossessed assets, other real estate owned, goodwill and other intangible assets. Financial Assets and Financial Liabilities Measured at Fair Value on a Recurring Basis A description of the valuation methodologies and key inputs used to measure financial assets and financial liabilities at fair value on a recurring basis, as well as the general classification of such instruments pursuant to the valuation hierarchy, is set forth below. These valuation methodologies were applied to the following categories of the Company’s financial assets and financial liabilities. Debt Securities Available for Sale Debt securities classified as available for sale are reported at fair value. U.S. Treasuries are valued using Level 1 inputs. Other debt securities available for sale including U.S. federal agencies, registered mortgage backed debt securities and state and political subdivisions are valued using prices from an independent pricing service utilizing Level 2 data. The fair value measurements consider observable data that may include dealer quotes, market spreads, cash flows, the U.S. Treasury yield curve, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the bond’s terms and conditions, among other things. The Company also invests in private label mortgage backed debt securities for which observable information is not readily available. These debt securities are reported at fair value utilizing Level 3 inputs. For these debt securities, management determines the fair value based on replacement cost, the income approach or information provided by outside consultants or lead investors. Discount rates are primarily based on reference to interest rate spreads on comparable debt securities of similar duration and credit rating as determined by the nationally recognized rating agencies adjusted for a lack of trading volume. Significant unobservable inputs are developed by investment securities professionals involved in the active trading of similar debt securities. The Company reviews the prices for Level 1 and Level 2 debt securities supplied by the independent pricing service for reasonableness and to ensure such prices are aligned with traditional pricing matrices. In general, the Company does not purchase investment portfolio debt securities that are esoteric or that have complicated structures. The Company’s portfolio primarily consists of traditional investments including U.S. Treasury obligations, federal agency mortgage pass-through debt securities, general obligation municipal bonds and a small amount of municipal revenue bonds. Pricing for such instruments is fairly generic and is easily obtained. For in-state bond issues that have relatively low issue sizes and liquidity, the Company utilizes the same parameters for pricing mentioned in the preceding paragraph adjusted for the specific issue. Periodically, the Company will validate prices supplied by the independent pricing service by comparison to prices obtained from third party sources. Derivatives Derivatives are reported at fair value utilizing Level 2 inputs. The Company obtains dealer and market quotations to value its oil and gas swaps and options. The Company utilizes dealer quotes and observable market data inputs to substantiate internal valuation models. The following table summarizes financial assets and financial liabilities measured at fair value on a recurring basis as of the periods presented, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value: Level 1 Inputs Level 2 Inputs Level 3 Inputs Total Fair Value (Dollars in thousands) December 31, 2022 Debt securities available for sale: U.S. Treasury $ 1,477,864 $ — $ — $ 1,477,864 U.S. federal agencies — 15,222 — 15,222 Mortgage-backed securities — 16,586 — 16,586 States and political subdivisions — 7,680 454 8,134 Asset backed securities — 13,010 — 13,010 Other debt securities — 7,405 — 7,405 Derivative assets — 20,745 — 20,745 Derivative liabilities — 19,683 — 19,683 December 31, 2021 Debt securities available for sale: U.S. Treasury $ 457,628 $ — $ — $ 457,628 U.S. federal agencies — 21,942 — 21,942 Mortgage-backed securities — 29,283 — 29,283 States and political subdivisions — 5,999 320 6,319 Asset backed securities — 13,357 — 13,357 Other debt securities — 2,994 — 2,994 Derivative assets — 8,946 — 8,946 Derivative liabilities — 8,237 — 8,237 The changes in Level 3 assets measured at estimated fair value on a recurring basis during the periods presented were as follows: Twelve Months Ended 2022 2021 (Dollars in thousands) Balance at the beginning of the year $ 320 $ 12,869 Transfers to level 2 — ( 12,714 ) Purchases 255 240 Settlements ( 110 ) ( 75 ) Total unrealized losses ( 11 ) — Balance at the end of the period $ 454 $ 320 The Company’s policy is to recognize transfers in and transfers out of Levels 1, 2 and 3 as of the end of the reporting period. During the year ended December 31, 2022, the Company did not transfer any debt securities. During the year ended December 31, 2021, the Company transferred debt securities from Level 3 to Level 2 due to a review of the pricing models that determined some asset backed debt securities to be Level 2. Financial Assets and Financial Liabilities Measured at Fair Value on a Nonrecurring Basis Certain financial assets and financial liabilities are measured at fair value on a nonrecurring basis; that is, the instruments are not measured at fair value on an ongoing basis but are subject to fair value adjustments in certain circumstances (for example, when there is evidence of impairment). These financial assets and financial liabilities are reported at fair value utilizing Level 3 inputs. The Company invests in equity securities without readily determinable fair values and utilizes Level 3 inputs. These equity securities are reported at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer. The realized and unrealized gains and losses are reported as securities transactions in the noninterest income section of the consolidated statements of comprehensive income. Collateral dependent loans are reported at the fair value of the underlying collateral if repayment is dependent on liquidation of the collateral. When the Company determines that foreclosure is probable or when the borrower is experiencing financial difficulty at the reporting date and repayment is expected to be provided substantially through the operation or sale of the collateral, expected credit losses are based on the fair value of the collateral at the reporting date, adjusted for selling costs as appropriate. In no case does the fair value of a collateral dependent loan exceed the fair value of the underlying collateral. The collateral dependent loans are adjusted to fair value through a specific allocation of the allowance for credit losses or a direct charge-down of the loan. Repossessed assets, upon initial recognition, are measured and adjusted to fair value through a charge-off to the allowance for possible credit losses based upon the fair value of the repossessed asset. Other real estate owned is revalued at fair value subsequent to initial recognition, with any losses recognized in net expense from other real estate owned. The following table summarizes assets measured at fair value on a nonrecurring basis during the period presented. These nonrecurring fair values do not represent all assets, only those assets that have been adjusted during the reporting period: Total Fair Value (Dollars in thousands) As of and for the Year-to-date Period Ended December 31, 2022 Equity securities $ 15,512 Collateral dependent loans 1,618 Repossessed assets 180 Other real estate owned 34,999 As of and for the Year-to-date Period Ended December 31, 2021 Equity securities $ 10,590 Collateral dependent loans 13,195 Repossessed assets 78 Other real estate owned 7,496 Estimated Fair Value of Financial Instruments The Company is required under current authoritative accounting guidance to disclose the estimated fair value of their financial instruments that are not recorded at fair value. For the Company, as for most financial institutions, substantially all of its assets and liabilities are considered financial instruments. A financial instrument is defined as cash, evidence of an ownership interest in an entity or a contract that creates a contractual obligation or right to deliver or receive cash or another financial instrument from a second entity. The following methods and assumptions were used to estimate the fair value of each class of financial instruments: Cash and Cash Equivalents Include: Cash and Due from Banks and Interest-Bearing Deposits with Banks The carrying amount of these short-term instruments is a reasonable estimate of fair value. Federal Funds Sold The carrying amount of these short-term instruments is a reasonable estimate of fair value. Debt Securities Held for Investment For debt securities held for investment, which are generally traded in secondary markets, fair values are based on quoted market prices or dealer quotes, if available. If a quoted market price is not available, fair value is estimated using quoted market prices for similar securities making adjustments for credit or liquidity if applicable. Loans Held for Sale The Company originates mortgage loans to be sold. At the time of origination, the acquiring bank has already been determined and the terms of the loan, including interest rate, have already been set by the acquiring bank allowing the Company to originate the loan at fair value. Mortgage loans are generally sold within 30 days of origination. Loans held for sale are valued using Level 2 inputs. Gains or losses recognized upon the sale of the loans are determined on a specific identification basis. Loans Held for Investment To determine the fair value of loans held for investment, the Company uses an exit price calculation, which takes into account factors such as liquidity, credit and the nonperformance risk of loans. For certain homogeneous categories of loans, such as some residential mortgages, fair values are estimated using the quoted market prices for securities backed by similar loans, adjusted for differences in loan characteristics. The fair values of other types of loans are estimated by discounting the future cash flows using the current rates at which similar loans would be made to borrowers with similar credit ratings and for the same remaining maturities. Deposits The fair values of transaction and savings accounts are the amounts payable on demand at the reporting date. The fair values of fixed-maturity certificates of deposit are estimated using the rates currently offered for deposits of similar remaining maturities. Short-term Borrowings The amounts payable on these short-term instruments are reasonable estimates of fair value. Subordinated Debt The fair values of subordinated debt are estimated using the rates that would be charged for subordinated debt of similar remaining maturities. Loan Commitments and Letters of Credit The fair values of commitments are estimated using the fees currently charged to enter into similar agreements, taking into account the terms of the agreements. The fair values of letters of credit are based on fees currently charged for similar agreements. T he estimated fair values of the Company’s financial instruments that are reported at amortized cost in the Company’s consolidated balance sheets, segregated by the level of valuation inputs within the fair value hierarchy utilized to measure fair value, are as follows: December 31, 2022 2021 Carrying Fair Value Carrying Fair Value (Dollars in thousands) FINANCIAL ASSETS Level 2 inputs: Cash and cash equivalents $ 3,168,910 $ 3,168,910 $ 2,050,022 $ 2,050,022 Federal funds sold 2,850 2,850 800 800 Debt securities held for investment 13 13 32 33 Loans held for sale 6,232 6,232 24,776 24,776 Level 3 inputs: Debt securities held for investment 2,370 2,370 2,945 2,945 Loans held for investment, net of allowance for credit losses 6,850,835 6,563,755 6,085,506 6,059,716 FINANCIAL LIABILITIES Level 2 inputs: Deposits 10,974,228 10,614,840 8,091,914 8,161,553 Short-term borrowings 300 300 — — Subordinated debt 86,044 82,385 85,987 90,391 OFF-BALANCE SHEET FINANCIAL INSTRUMENTS Loan commitments 4,598 3,648 Letters of credit 542 621 Non-financial Assets and Non-financial Liabilities Measured at Fair Value The Company has no non-financial assets or non-financial liabilities measured at fair value on a recurring basis. Certain non-financial assets and non-financial liabilities measured at fair value on a nonrecurring basis include intangible assets and other non-financial long-lived assets measured at fair value and adjusted for impairment. These items are evaluated at least annually for impairment, of which there was none as of December 31, 2022 or 2021. The overall levels of non-financial assets and non-financial liabilities measured at fair value on a nonrecurring basis were not considered to be significant to the Company at December 31, 2022 or 2021.

Derivative Financial Instrument

Derivative Financial Instruments	12 Months Ended
	Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	(22) DERIVATIVE FINANCIAL INSTRUMENTS The Company enters into oil and gas swaps and options contracts to accommodate the business needs of its customers. Upon the origination of an oil or gas swap or option contract with a customer, to mitigate the exposure to fluctuations in oil and gas prices, the Company simultaneously enters into an offsetting contract with a counterparty. These derivatives are not designated as hedged instruments and are recorded on the Company's consolidated balance sheet at fair value and are included in other assets. The Company's derivative financial instruments require a daily margin to be posted, which fluctuates with oil and gas prices. These margins are included in other assets totaling $ 6.6 million at December 31, 2022 and $ 14.3 million at December 31, 2021. The Company utilizes dealer quotations and observable market data inputs to substantiate internal valuation models. The notional amounts and estimated fair values of oil and gas derivative positions outstanding are presented in the following table: December 31, 2022 2021 Oil and Natural Gas Swaps and Options Notional Units Notional Estimated Notional Estimated (Notional amounts and dollars in thousands) Oil Derivative assets Barrels 2,698 $ 8,868 2,585 $ 6,563 Derivative liabilities Barrels ( 2,698 ) ( 8,259 ) ( 2,585 ) ( 6,129 ) Gas/Natural Gas Liquids Derivative assets MMBTUs/Gallons 25,059 11,877 19,752 2,383 Derivative liabilities MMBTUs/Gallons ( 25,059 ) ( 11,424 ) ( 19,752 ) ( 2,108 ) Total Fair Value Included in Derivative assets Other assets 20,745 8,946 Derivative liabilities Other liabilities ( 19,683 ) ( 8,237 ) The following table is a summary of the Company’s recognized income related to the activity, which was included in other noninterest income: Year Ended December 31, 2022 2021 2020 (Dollars in thousands) Derivative income $ 416 $ 266 $ 50 The Company’s credit exposure on oil and gas swaps and options varies based on the current market prices of oil and natural gas. Other than credit risk, changes in the fair value of customer positions will be offset by equal and opposite changes in the counterparty positions. The net positive fair value of the contracts represents the profit derived from the activity and is unaffected by market price movements. The Company’s share of total profit is approximately 35 %. Customer credit exposure is managed by strict position limits and is primarily offset by first liens on production while the remainder is offset by cash. Counterparty credit exposure is managed by selecting highly rated counterparties (rated A- or better by Standard and Poor’s) and monitoring market information. The following table is a summary of the Company’s net credit exposure relating to oil and gas swaps and options with bank counterparties: December 31, 2022 2021 (Dollars in thousands) Credit exposure $ 6,560 $ — Balance Sheet Offsetting Derivatives may be eligible for offset in the consolidated balance sheet and/or subject to master netting arrangements. The Company’s derivative transactions with upstream financial institution counterparties and bank customers are generally executed under International Swaps and Derivative Association (“ISDA”) master agreements, which include “right of set-off” provisions. In such cases there is generally a legally enforceable right to offset recognized amounts and there may be an intention to settle such amounts on a net basis. Nonetheless, the Company does not generally offset such financial instruments for financial reporting purposes.

Segment Information

Segment Information	12 Months Ended
	Dec. 31, 2022
Segment Reporting [Abstract]
Segment Information	(23) SEGMENT INFORMATION The Company evaluates its performance with an internal profitability measurement system that measures the profitability of its business units on a pre-tax basis. The six principal business units are metropolitan banks, community banks, Pegasus, Worthington, other financial services and executive, operations and support. Metropolitan banks, community banks, Pegasus and Worthington offer traditional banking products such as commercial and retail lending and a full line of deposit accounts. Metropolitan banks consist of banking locations in the metropolitan Oklahoma City and Tulsa areas. Community banks consist of banking locations in communities throughout Oklahoma. Pegasus consists of banking locations in the Dallas metropolitan area. Worthington consists of banking locations in the Fort Worth metropolitan area. Other financial services are specialty product business units including guaranteed small business lending, residential mortgage lending, trust services, securities brokerage, electronic banking and insurance. The executive, operations and support groups represent executive management, operational support and corporate functions that are not allocated to the other business units. The results of operations and selected financial information for the six business units are as follows: BancFirst Metropolitan BancFirst Community Pegasus Worthington Other Executive, Eliminations Consolidated (Dollars in thousands) December 31, 2022 Net interest income $ 97,728 $ 208,728 $ 46,439 $ 14,919 $ 8,065 $ ( 2,226 ) $ 20 $ 373,673 Provision for/(benefit from) credit losses 2,186 2,451 2,840 ( 43 ) ( 161 ) 2,803 — 10,076 Noninterest income 32,756 72,385 1,026 1,034 50,643 223,844 ( 197,941 ) 183,747 Depreciation and amortization 2,821 10,453 789 398 519 7,068 — 22,048 Other expenses 42,583 117,248 19,013 9,280 36,271 64,325 ( 856 ) 287,864 Income before taxes $ 82,894 $ 150,961 $ 24,823 $ 6,318 $ 22,079 $ 147,422 $ ( 197,065 ) $ 237,432 Total assets $ 3,412,369 $ 6,886,066 $ 1,404,033 $ 541,002 $ 171,679 $ 1,473,443 $ ( 1,500,729 ) $ 12,387,863 Capital expenditures $ 2,026 $ 10,146 $ 311 $ 262 $ 67 $ 6,973 $ — $ 19,785 December 31, 2021 Net interest income $ 77,840 $ 180,925 $ 24,222 $ — $ 35,244 $ ( 3,295 ) $ 721 $ 315,657 (Benefit from)/provision for credit losses ( 5,474 ) ( 4,694 ) 1,395 — 109 ( 26 ) — ( 8,690 ) Noninterest income 23,257 65,600 1,448 — 47,124 203,005 ( 170,402 ) 170,032 Depreciation and amortization 2,593 10,483 782 — 557 5,626 — 20,041 Other expenses 39,356 110,574 15,317 — 60,435 41,199 ( 941 ) 265,940 Income before taxes $ 64,622 $ 130,162 $ 8,176 $ — $ 21,267 $ 152,911 $ ( 168,740 ) $ 208,398 Total assets $ 2,627,874 $ 5,821,220 $ 1,045,699 $ — $ 71,694 $ 1,201,974 $ ( 1,362,849 ) $ 9,405,612 Capital expenditures $ 1,612 $ 7,390 $ 363 $ — $ 400 $ 17,486 $ — $ 27,251 December 31, 2020 Net interest income $ 85,464 $ 175,757 $ 21,360 $ — $ 23,500 $ 79 $ 508 $ 306,668 Provision for credit losses 30,202 29,827 1,916 — 562 141 — 62,648 Noninterest income 18,664 60,386 1,071 — 41,549 118,491 ( 102,939 ) 137,222 Depreciation and amortization 2,639 10,603 760 — 500 3,922 — 18,424 Other expenses 36,746 111,341 13,831 — 44,918 33,588 ( 1,118 ) 239,306 Income before taxes $ 34,541 $ 84,372 $ 5,924 $ — $ 19,069 $ 80,919 $ ( 101,313 ) $ 123,512 Total assets $ 2,729,886 $ 5,527,611 $ 919,572 $ — $ 137,122 $ 1,073,507 $ ( 1,175,341 ) $ 9,212,357 Capital expenditures $ 1,087 $ 9,946 $ 1,775 $ — $ 450 $ 53,188 $ — $ 66,446 The financial information for each business unit is presented on the basis used internally by management to evaluate performance and allocate resources. The Company utilizes a transfer pricing system to allocate the benefit or cost of funds provided or used by the various business units. Certain services provided by the support group to other business units, such as item processing, are allocated at rates approximating the cost of providing the services. Eliminations are adjustments to consolidate the business units and companies. Capital expenditures are generally charged to the business unit using the asset.

Description of Business and S_2

Description of Business and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2022
Accounting Policies [Abstract]
Nature of Operations	Nature of Operations BancFirst Corporation is an Oklahoma business corporation and a financial holding company under federal law. It conducts virtually all of its operating activities through its principal wholly-owned subsidiary, BancFirst (“BancFirst”), an Oklahoma state-chartered bank headquartered in Oklahoma City, Oklahoma. The Company also conducts operating activities through its wholly-owned subsidiaries, Pegasus Bank (“Pegasus”), a Texas state-chartered bank headquartered in Dallas, Texas and Worthington Bank ("Worthington"), a Texas state-chartered bank headquartered in Arlington, Texas. BancFirst, Pegasus and Worthington provide a wide range of retail and commercial banking services, including: commercial, real estate, agricultural and consumer lending; depository and funds transfer services; collections; safe deposit boxes; cash management services; and other services tailored for both individual and corporate customers. BancFirst also offers trust services and acts as executor, administrator, trustee, transfer agent and in various other fiduciary capacities. BancFirst provides item processing, research and other correspondent banking services to financial institutions and governmental units. The Company’s wholly-owned subsidiary, BancFirst Insurance Services, Inc., an independent insurance agency, offers a variety of commercial and personal insurance products. In addition, the Company’s wholly-owned subsidiary, Council Oak Partners, LLC, an Oklahoma limited liability company, engages in investing activities.
Basis of Presentation	Basis of Presentation The accompanying consolidated financial statements include the accounts of BancFirst Corporation, Council Oak Partners, LLC, BancFirst Insurance Services, Inc., Pegasus, Worthington and BancFirst and its subsidiaries. The principal operating subsidiaries of BancFirst are BFTower, LLC, BFC-PNC LLC, BF Brazito, LLC, and BancFirst Agency, Inc. All significant intercompany accounts and transactions have been eliminated. Assets held in a fiduciary or agency capacity are not assets of the Company and, accordingly, are not included in the consolidated financial statements. Certain amounts from 2021 and 2020 have been reclassified to conform to the 2022 presentation. These reclassifications were not material to the Company’s consolidated financial statements.
Use of Estimates in the Preparation of Financial Statements	Use of Estimates in the Preparation of Financial Statements The preparation of financial statements in conformity with U.S. GAAP inherently involves the use of estimates and assumptions that affect the amounts reported in the financial statements and the related disclosures. These estimates relate principally to the determination of the allowance for credit losses, income taxes, the fair value of financial instruments and the valuation of assets and liabilities acquired in a business combination, including identifiable intangible assets. Such estimates and assumptions may change over time and actual amounts realized may differ from those reported.
Securities	Securities The Company invests in debt securities. Any sales of debt securities are for the purpose of executing the Company’s asset/liability management strategy, eliminating a perceived credit risk in a specific security or providing liquidity. Debt securities that are being held for indefinite periods of time, or that may be sold as part of the Company’s asset/liability management strategy, to provide liquidity or for other reasons, are classified as available for sale and are stated at estimated fair value. Unrealized gains or losses on debt securities available for sale are reported as a component of stockholders’ equity, net of income tax. Gains or losses from sales of debt securities are based upon the book values of the specific debt securities sold. Debt securities for which the Company has the intent and ability to hold to maturity are classified as held for investment and are stated at cost, adjusted for amortization of premiums and accretion of discounts computed under the interest method. The Company reviews its portfolio of debt securities in an unrealized loss position at least quarterly. 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, the Company considers, among other things, the performance of any underlying collateral and adverse conditions specifically related to the security. The Company does not consider the unrealized position of its debt securities to be the result of credit factors, because the decline in fair value is attributable to changes in interest rates and illiquidity, and not credit quality, and the Company does not have the intent to sell these securities and it is likely that it will not be required to sell the securities before their anticipated recovery. Therefore, the Company has not recorded an allowance for credit losses against its debt securities portfolio, as the credit risk is not material. The Company does not engage in securities trading activities. The Company invests in equity securities without readily determinable fair values and utilizes Level 3 inputs. These securities are reported at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer. The realized and unrealized gains and losses are reported as securities transactions in the noninterest income section of the consolidated statements of comprehensive income. Equity securities are reported in other assets on the consolidated balance sheet. The Company reviews its portfolio of equity securities for impairment at least quarterly.
Loans	Loans The lending function is governed by written policies and procedures, as determined by senior management and approved by the Board of Directors. The policies and procedures set the standards for lending in each major loan category by collateral type and use of loan proceeds. The objectives of these policies and procedures are to identify profitable markets, determine appropriate risk tolerance levels for each type of loan, establish limits for loan officer approval, set concentration limits, establish loan-to-value thresholds, set repayment terms and loan structure guidelines and adhere to documentation requirements. Interest rate risk is controlled by the use of variable rate provisions, the vast majority of which have a rate floor, limits on fixing rates for longer periods and the use of prepayment penalties. Loans originated within the Company are stated at the principal amount outstanding, net of unearned interest, loan fees and allowance for credit losses. Interest on all performing loans is recognized, on a simple interest basis, based upon the principal amount outstanding. See Note (5) for loan disclosures. Loans that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are reported at amortized cost. Amortized cost is the principal balance outstanding, net of purchase premiums and discounts. The Company has made the accounting policy election to exclude accrued interest receivable on loans from the estimate of credit losses because it writes off uncollectible accrued interest in a timely manner. Interest income is accrued on the unpaid principal balance using the simple-interest method on the daily balances of the principal amounts outstanding. The Company writes off accrued interest once a loan enters non-accrual status. The Company debits interest income for the interest accrued. No interest will be accrued on loans, for which a default of principal or interest has existed for a period of at least 90 days unless the collateral margin or guarantor support are such that full collection of principal and interest are not in doubt and an orderly plan for collection is in process. The Company also suspends interest recognition on any other loan for which it is more likely than not that future contractual payments will not be collected. Interest income on consumer and commercial loans is discontinued and placed on nonaccrual status at the time the loan is 90 days delinquent unless the loan is well secured and in process of collection. Consumer loans are charged off at 180 days past due and commercial loans are charged off to the extent principal or interest is deemed uncollectible. Past-due status is based on the contractual terms of the loan. In all cases, loans are placed on nonaccrual or charged off at an earlier date if collection of principal or interest is considered doubtful. All interest accrued but not received for loans placed on nonaccrual is reversed against interest income. The amount of interest accrued but not received for loans placed on nonaccrual and reversed against interest income was $ 147,000 , $ 83,000 and $ 841,000 million for the years ended December 31, 2022, 2021 and 2020, respectively. Interest received on such loans is accounted for on the cash-basis or cost-recovery method, until qualifying for return to accrual. Under the cost-recovery method, interest income is not recognized until the loan balance is reduced to zero. Under the cash-basis method, interest income is recorded when the payment is received in cash. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured. Troubled debt restructurings are loans on which, due to the borrower’s financial difficulties, the Company has granted a concession that the Company would not otherwise consider for borrowers of similar credit quality. This may include a transfer of real estate or other assets from the borrower, a modification of loan terms, or a combination of the two. Modifications of terms that could potentially qualify as a restructuring include reduction of contractual interest rate, extension of the maturity date at a contractual interest rate lower than the current rate for new debt with similar risk, and a reduction of the face amount of debt or forgiveness of either principal or accrued interest. A loan continues to qualify as restructured until a consistent payment history or change in the borrower’s financial condition has been evidenced, generally for no less than twelve months. If the restructuring agreement specifies an interest rate at the time of the restructuring that is greater than or equal to the rate that the Company is willing to accept for a new extension of credit with comparable risk, then the loan is no longer considered a restructured loan if it is in compliance with the modified terms in calendar years after the year of restructure. Residential real estate loans are made in accordance with underwriting policies and are fully documented. Credit worthiness is assessed based on significant credit characteristics including credit history and residential and employment stability. The Company does not engage in any hybrid loan programs. In addition, the Company does not have any exposure to loans with negative amortization, interest rate carryover or discounting of the initial rates (teaser rates). An updated appraisal of the collateral is obtained when a loan is first identified as a problem loan. Appraisals are reviewed annually and are updated as needed or are updated more frequently if significant changes are believed to have occurred in the collateral or market conditions. Appraisals of other real estate owned are also reviewed and updated consistent with this policy. When a loan deteriorates to the point that the account officer or the Loan Committee concludes it no longer represents a viable asset, it will be charged off. Similarly, any portion of a loan that is deemed to no longer be a viable asset will be charged off. A loan will not be charged off unless such action has been approved by the branch President.
Acquired Loans	Acquired Loans Loans acquired through business combinations are required to be carried at fair value as of the date of the combination. Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction (that is, not a forced liquidation or distressed sale) between market participants at the measurement date. The methodology of allowance for credit loss recorded for these acquired loans depends on whether the acquired loans are purchase credit deteriorated or non-purchase credit deteriorated. An allowance for credit loss for non-purchase credit deteriorated loans is determined and recorded in a manner consistent with originated loans. That is, the allowance for credit loss is calculated based on the loan’s amortized cost basis (i.e., the acquisition date fair value in a business combination) and is established through a charge to provision expense at the acquisition date. An allowance for credit loss for purchase credit deteriorated loans is recorded as an adjustment to the loans, in addition to the fair value amount recorded, as of the acquisition date, and not through provision expense. The acquisition date fair value plus the allowance for credit loss equals the loans new amortized cost basis as of the acquisition date. The difference between the new amortized cost basis and the unpaid principal balance of the loan represents the non-credit purchase discount/premium recorded. The difference between the fair value of loans which do not have specific evidence of deterioration of credit quality since origination and their principal balance is recognized in interest income on a level-yield method over the life of the loans. For loans which it is probable, at acquisition, that the Company will be unable to collect all contractually required payments (as determined by the present value of expected future cash flows), the difference between the undiscounted cash flows expected at acquisition and the investment in the loan, or the “accretable yield,” is recognized in interest income on a level-yield method over the life of the loan. Contractually required payments for interest and principal that exceed the undiscounted cash flows expected at acquisition, or the “nonaccretable difference,” are not recognized as yield adjustments or as loss accruals or valuation allowances. Increases in expected cash flows subsequent to the initial investment are recognized prospectively through adjustment of the yield on the loan over its remaining life. Decreases in expected cash flows are recognized as impairments. Any probable loss due to subsequent credit deterioration of the loans since acquisition is provided for in the allowance for credit losses.
Purchased Credit Deteriorated (PCD) Loans	Purchased Credit Deteriorated (PCD) Loans The Company has purchased loans, some of which have experienced more than insignificant credit deterioration since origination. An allowance for credit losses is determined using the same methodology as other loans held for investment. The initial allowance for credit losses determined on a collective basis is allocated to individual loans. The sum of the loan’s purchase price and allowance for credit losses becomes its initial amortized cost basis. The difference between the initial amortized cost basis and the par value of the loan is a noncredit discount or premium, which is amortized into interest income over the life of the loan. Subsequent changes to the allowance for credit losses are recorded through provision expense.
Loans Held for Sale	Loans Held for Sale The Company originates mortgage loans to be sold. At the time of origination, the acquiring bank has already been determined and the terms of the loan, including the interest rate, have already been set by the acquiring bank allowing the Company to originate the loan at fair value. Mortgage loans are generally sold within 30 days of origination. Loans held for sale are carried at the lower of cost or fair value. Gains or losses recognized upon the sale of the loans are determined on a specific identification basis. The Company does not sell residential mortgage loans with recourse other than obligations under standard representations and warranties or for fraud. These obligations relate to loan performance for the life of the loan. The amount of loans repurchased since the inception of the program is not considered to be material, and therefore, no reserve has been required.
Allowance for Credit Losses	Allowance for Credit Losses The allowance for credit losses is a valuation account that is deducted from the loans amortized cost basis to present the net amount expected to be collected on the loans. Loans are charged off against the allowance when management believes the uncollectibility of a loan balance is confirmed. Expected recoveries do not exceed the aggregate of amounts previously charged-off and expected to be charged-off. The allowance for credit losses is increased by provisions charged to operating expense and is reduced by net loan charge-offs. The Company considers various factors to monitor the credit risk in the loan portfolio including volume and severity of loan delinquencies, nonaccrual loans, internal grading of loans, historical loan loss experience and economic conditions. Management estimates the allowance balance 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, delinquency level, or term as well as for changes in environmental conditions, such as the political, legal, and regulatory environment, technology and consumer preferences. Historical loss information is also adjusted for reasonable and supportable changes in national and local economic conditions, such as consumer loans 90 days past due and commercial bankruptcies. Economic conditions are forecast as "current conditions" over the forecast period. Forecast models were used to validate credit performance during the forecast period. Beyond the reasonable and supportable forecast, the economic expectation reverts to the historical average, which is determined by the weighted average life of each loan pool. If a loan is individually evaluated a specific allowance is provided, if necessary, so that the loan is reported net, at the fair value of collateral. Interest payments on collateral dependent loans are typically applied to principal unless collectability of the principal amount is reasonably assured, in which case interest is recognized on a cash basis. Loans, or portions thereof, are charged off when deemed uncollectible. The allowance for credit losses is measured on a collective (pool) basis when similar risk characteristics exist.
Determining the Contractual Term	Determining the Contractual Term Expected credit losses are estimated over the contractual term of the loans, 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 at the reporting date that a troubled debt restructuring will be executed with an individual borrower or the extension or renewal options are included in the original or modified contract at the reporting date and are not unconditionally cancellable by the Company.
Troubled Debt Restructurings (TDRs)	Troubled Debt Restructurings (TDRs) The allowance for credit loss on a TDR is measured using the same method as all other loans held for investment, except when the value of a concession cannot be measured using a method other than the discounted cash flow method. When the value of a concession is measured using the discounted cash flow method, the allowance for credit loss is determined by discounting the expected future cash flows at the original interest rate of the loan.
Allowance for Credit Losses on Off-Balance Sheet Credit Exposures	Allowance for Credit Losses on Off-Balance Sheet Credit Exposures The Company estimates expected credit losses over the contractual period in which the Company is exposed to credit risk via a contractual obligation to extend credit, unless that obligation is unconditionally cancellable by the Company. The allowance for credit losses on off-balance sheet credit exposures is adjusted as a provision for credit loss expense. The estimate includes consideration of the likelihood that funding will occur and an estimate of expected credit losses on commitments expected to be funded over its estimated life. Based on a low likelihood that funding will occur and the Company’s ability to manage the extension of credit to our borrowers, the allowance for credit losses on off-balance sheet credit exposure is not material.
Allowance for Credit Losses on Available-for-Sale Debt Securities	Allowance for Credit Losses on Available-for-Sale Debt Securities The Company reviews its portfolio of debt securities in an unrealized loss position at least quarterly. 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, the Company considers, among other things, the performance of any underlying collateral and adverse conditions specifically related to the security. At December 31, 2022 and December 31, 2021 approximately 98 % of the available for sale debt securities held by the Company were issued by the U.S. Treasury, or U.S. government-sponsored entities and agencies. The Company does not consider the unrealized loss position of these securities to be the result of credit factors, because the decline in fair value is attributable to changes in interest rates and illiquidity, and not credit quality, and the Company does not have the intent to sell these securities and it is likely that it will not be required to sell the securities before their anticipated recovery. Therefore, the Company has not recorded an allowance for credit losses against its debt securities portfolio, as the credit risk is not material.
PPP Fee Income Policy	PPP Fee Income Policy The Paycheck Protection Program (“PPP”) , established as part of the Coronavirus Aid, Relief and Economic Security (“CARES”) Act, provided that the Small Business Administration ("SBA") would pay processing fees of up to 5 % to lenders based on the volume of the PPP loans disbursed. The fee was based on the balance of each PPP loan outstanding at the time of full disbursement. The Company received processing fees from the SBA of $ 23.8 million in 2021 and $ 30.2 million in 2020. The unamortized balance of these fees on each loan is reported on the Company's consolidated balance sheet as part of the loan balance to which it relates and is recognized over the remaining life of the loan as an adjustment of yield. The unamortized balances of these fees was $ 0 and $ 2.0 million for the year ended December 31, 2022 and 2021, respectively.
Nonaccrual Policy	Nonaccrual Policy A loan is placed on nonaccrual status when, in the opinion of management, the future collectability of both interest and principal is not probable. When interest accrual is discontinued, all unpaid accrued interest is reversed. Interest income is recognized on certain of these loans on a cash basis if the full collection of the remaining principal balance is reasonably expected. Otherwise, interest income is not recognized until the principal balance is fully collected. The Company does not accrue interest on (1) any loan upon which a default of principal or interest has existed for a period of 90 days or over unless the collateral margin or guarantor support are such that full collection of principal and interest are not in doubt, and an orderly plan for collection is in process; and (2) any other loan for which it is expected full collection of principal and interest is not probable. A nonaccrual loan may be restored to an accrual status when none of its principal and interest are past due and unpaid or otherwise becomes well secured and in the process of collection and when prospects for collection of future contractual payments are no longer in doubt. With the exception of a formal debt forgiveness agreement, no loan which has had principal charged-off shall be restored to accrual status unless the charged-off principal has been recovered.
Premises and Equipment	Premises and Equipment Premises and equipment are stated at cost, less accumulated depreciation. Depreciation is charged to operating expense and is computed using the straight-line method over the estimated useful lives of the assets. Maintenance and repairs are charged to expense as incurred while improvements are capitalized. Premises and equipment is tested for impairment if events or changes in circumstances occur that indicate that the carrying amount of any premises and equipment may not be recoverable. Impairment losses are measured by comparing the fair values of the premises and equipment with their recorded amounts. Premises that are identified to be sold are transferred to other real estate owned at the lower of their carrying amounts or their fair values less estimated costs to sell. Any losses on premises identified to be sold are charged to operating expense. When premises and equipment are transferred to other real estate owned, sold, or otherwise retired, the cost and applicable accumulated depreciation are removed from the respective accounts and any resulting gains or losses are reported in the consolidated statement of comprehensive income. Construction in progress includes all the costs of construction associated with the building of fixed long-term assets and is included in premises and equipment, net as an asset. When construction is completed, the asset is reclassified as a building or a leasehold improvement and depreciated over its applicable useful life.
Leases	Leases Certain operating leases are included as right of use lease assets in accrued interest receivable and other assets on the consolidated balance sheet and a related lease liability is included in accrued interest payable and other liabilities on the consolidated balance sheet. Right of use assets represent the Company’s right to use an underlying asset for the lease term and lease liabilities represent the Company’s obligation to make lease payments arising from the lease. The lease liability is measured as the present value of the unpaid lease payments, and the right of use assets value is derived from the calculation of the lease liability. To calculate the discount rate for each lease, the Company uses the rate implicit in the lease if available, otherwise an appropriate Federal Home Loan Bank ("FHLB") advance borrowing rate is used that correlates with the term of the lease.
Other Real Estate Owned	Other Real Estate Owned Other real estate owned ("OREO") consists of properties acquired through foreclosure proceedings or acceptance of a deed in lieu of foreclosure, and premises held for sale. These properties are carried at the lower of the book values of the related loans or fair values based upon appraisals, less estimated costs to sell. Losses arising at the time of reclassification of such properties from loans to OREO are charged directly to the allowance for credit losses. Any losses on premises identified to be sold are charged to operating expense at the time of transfer from premises to OREO. Losses from declines in value of the properties subsequent to classification as OREO are charged to operating expense. Revenues and expenses for OREO property are included in the consolidated statement of comprehensive income for the period in which they occur. Gross rental income for OREO is included in other non-interest income. The expenses of operating or holding OREO property are included in noninterest expense.
Intangible Assets and Goodwill	Intangible Assets and Goodwill Core deposit intangibles are amortized on a straight-line basis over the estimated useful lives of seven to ten years and customer relationship intangibles are amortized on a straight-line basis over the estimated useful life of three to eighteen years . Goodwill is not amortized but is evaluated at a reporting unit level at least annually for impairment, or more frequently if other indicators of impairment are present. At least annually in the fourth quarter, intangible assets are evaluated for possible impairment. Impairment losses are measured by comparing the fair values of the intangible assets with their recorded amounts. Any impairment losses are reported in the consolidated statement of comprehensive income.
Advertising Costs	Advertising Costs Advertising costs are expensed as incurred. Advertising costs for the year ended December 31, 2022 were $ 3.0 million. Advertising costs for the years ended December 31, 2021 and 2020 were $ 3.0 million and $ 3.3 million, respectively.
Stock-based Compensation	Stock-based Compensation The Company recognizes stock-based compensation as compensation expense in the consolidated statement of comprehensive income based on the fair value of the Company’s stock options on the measurement date, which, for the Company, is the date of the grant. The fair value of each option grant is estimated on the date of grant using the Black-Scholes option-pricing model and is based on certain assumptions including risk-free rate of return, dividend yield, stock price volatility and the expected term. The fair value of each option is expensed over its vesting period.
Income Taxes	Income Taxes The Company files a consolidated income tax return with its subsidiaries. Federal and state income tax expense or benefit has been allocated to subsidiaries on a separate return basis. Deferred taxes are recognized under the balance sheet method based upon the future tax consequences of temporary differences between the carrying amounts and tax basis of assets and liabilities, using the tax rates expected to apply to taxable income in the periods when the related temporary differences are expected to be realized. Realization of deferred tax assets is dependent upon the generation of a sufficient level of future taxable income and recoverable taxes paid in prior years. Although realization is not assured, management believes it is more likely than not that all of the deferred tax assets will be realized.
Earnings Per Common Share	Earnings Per Common Share Basic earnings per common share is computed by dividing net income, less any preferred dividends requirement, by the weighted average of common shares outstanding. Diluted earnings per common share reflects the potential dilution that could occur if options, convertible securities or other contracts to issue common stock were exercised or converted into common stock or resulted in the issuance of common stock that then shared in the earnings of the Company.
Revenue Recognition	Revenue Recognition In addition to lending and related activities, the Company offers various services to customers that generate revenue. Contract performance typically occurs in one year or less. Incremental costs of obtaining a contract are expensed when incurred when the amortization period is one year or less. Sales of real estate The sale of real estate property is generally recognized, along with any associated gain or loss, when control of the property transfers to the buyer. Service and transaction fees on depository accounts Customers often pay certain fees to the bank to access the cash on deposit including certain non-transactional fees such as account maintenance or dormancy fees, and certain transaction-based fees such as non-sufficient funds fees, overdraft, ATM, wire transfer, or foreign exchange fees. Revenue is recognized when the transactions occur or as services are performed over primarily monthly or quarterly periods. Payment is typically received in the period the transactions occur, or in some cases, within 90 days of the service period. Interchange Fees Interchange fees, or “swipe” fees, are charges that merchants pay to the processors who, in turn, share that revenue with us and other card-issuing banks for processing electronic payment transactions. Interchange fees represent the portion of the debit card transaction amount that the card issuer retains to compensate it for processing transactions and providing rewards. Interchange fees are settled and recognized on a daily or monthly basis. Insurance Commissions and Fees Insurance commissions are received on the sale of insurance products, and revenue is recognized upon the placement date of the insurance policies or when such commissions are received. Payment is normally received within the policy period. In addition to placement, the Company also provides insurance policy related risk management services. Revenue is recognized as these services are provided. Performance-based commissions are recognized when received or earlier when, upon consideration of past results and current condition, the revenue is deemed not probable of reversal. For accounts billed by BancFirst Insurance Services, Inc., commission revenue is recognized at the later of the billing date or the effective date of the related insurance policies. Commission revenue, for accounts that are directly billed by the insurance company to the insured, is recognized when determinable by BancFirst Insurance Services, Inc., which is generally when such commissions are received. BancFirst Insurance Services, Inc. also receives contingent commissions from insurance companies as additional incentive for achieving specified premium volume goals and/or loss experience parameters relating to the insurance they place. Contingent commissions from insurance companies are recognized when determinable, which is generally when such commissions are received. Trust BancFirst offers trust services and acts as executor, administrator, trustee, transfer agent and in various other fiduciary capacities. There are four basic types of fees that are included in the trust department income. Administrative fees are assessed for managing trust accounts. Shareholder fees are received in connection with holding specific fund share classes. In return for these services, the mutual fund (or its distributor or investment advisor) pay a fee to BancFirst. Oil and gas fees are assessed for management of oil and gas related activities. There are also other types of fees charged on a one time basis such as those related to opening and closing trust accounts. BancFirst records trust fees on a monthly, quarterly or annual basis based on the size of the asset being managed. Fees may be fixed or, where applicable, based on a percentage of transaction size of managed assets. These fees are recorded as revenue at the time the fee is billed, according to the agreement with the customer.
Comprehensive Income	Comprehensive Income Comprehensive income includes all changes in stockholders’ equity during a period, except those resulting from transactions with stockholders. Besides net income, other components of the Company’s comprehensive income includes the after tax effect of changes in the net unrealized gain/loss on debt securities available for sale. The Company’s policy is to release material stranded tax effects included in accumulated other comprehensive income on a specific identification basis.
Consolidated Statement of Cash Flows	Consolidated Statement of Cash Flows For purposes of the consolidated statement of cash flows, the Company considers cash and due from banks and interest-bearing deposits with banks as cash equivalents.
Recent Accounting Pronouncements	Recent Accounting Pronouncements Standards Not Yet Adopted: In March 2022, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2022-02, “Financial Instruments – Credit Losses (Topic 326).” ASU 2022-02 eliminates the TDR recognition and measurement guidance and, instead, requires that the Company evaluate, based on the accounting for loan modifications, whether the modification represents a new loan or a continuation of an existing loan. The Company has the option to apply a modified retrospective transition method, resulting in a cumulative-effect adjustment to retained earnings when adopted. In addition, the update requires that the Company disclose current-period write-offs by year of origination for financing receivables. The current-period write-off amendment should be applied prospectively. The amendments are effective for annual periods beginning after December 15, 2022, including interim periods within those annual periods. ASU 2022-02 will be effective for the Company on January 1, 2023. The adoption of ASU No. 2022-02 is not expected to have a significant impact on the Company’s consolidated financial statements.

Cash, Due from Banks, Interes_2

Cash, Due from Banks, Interest-Bearing Deposits and Federal Funds Sold (Tables)	12 Months Ended
	Dec. 31, 2022
Cash and Cash Equivalents [Abstract]
Summary of Vault Cash and Funds on Deposit with Federal Reserve Bank	The Company maintained vault cash and funds on deposit with the Federal Reserve Bank, which is included in the following table: December 31, 2022 2021 (Dollars in thousands) Vault cash and funds on deposit with the Federal Reserve Bank $ 2,942,665 $ 1,907,482

Securities (Tables)

Securities (Tables)	12 Months Ended
	Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract]
Summary of Amortized Cost and Estimated Fair Values of Debt Securities Held for Investment	The following table summarizes the amortized cost and estimated fair values of debt securities held for investment: Amortized Gross Gross Estimated (Dollars in thousands) December 31, 2022 Mortgage backed securities (1) $ 13 $ — $ — $ 13 States and political subdivisions 1,870 — — 1,870 Other securities 500 — — 500 Total $ 2,383 $ — $ — $ 2,383 December 31, 2021 Mortgage backed securities (1) $ 32 $ 1 $ — $ 33 States and political subdivisions 2,445 — — 2,445 Other securities 500 — — 500 Total $ 2,977 $ 1 $ — $ 2,978
Summary of Amortized Cost and Estimated Fair Values of Debt Securities Available for Sale	The following table summarizes the amortized cost and estimated fair values of debt securities available for sale: Amortized Gross Gross Estimated (Dollars in thousands) December 31, 2022 U.S. treasuries $ 1,568,563 $ — $ ( 90,699 ) $ 1,477,864 U.S. federal agencies 15,025 198 ( 1 ) 15,222 Mortgage backed securities (1) 18,449 21 ( 1,884 ) 16,586 States and political subdivisions 8,320 35 ( 221 ) 8,134 Asset backed securities 13,371 — ( 361 ) 13,010 Other securities 8,163 — ( 758 ) 7,405 Total $ 1,631,891 $ 254 $ ( 93,924 ) $ 1,538,221 December 31, 2021 U.S. treasuries $ 455,701 $ 3,693 $ ( 1,766 ) $ 457,628 U.S. federal agencies 21,609 335 ( 2 ) 21,942 Mortgage backed securities (1) 28,897 400 ( 14 ) 29,283 States and political subdivisions 6,128 194 ( 3 ) 6,319 Asset backed securities 13,354 3 — 13,357 Other securities 3,000 — ( 6 ) 2,994 Total $ 528,689 $ 4,625 $ ( 1,791 ) $ 531,523 (1) Primarily consists of FHLMC, FNMA, GNMA and mortgage backed securities through U.S. agencies.
Maturity of Debt Securities	The maturities of debt securities held for investment and available for sale are summarized in the following table using contractual maturities. Actual maturities may differ from contractual maturities due to obligations that are called or prepaid. For purposes of the maturity table, mortgage-backed securities, which are not due at a single maturity date, have been presented at their contractual maturity. December 31, 2022 2021 Amortized Estimated Amortized Estimated (Dollars in thousands) Held for Investment Contractual maturity of debt securities: Within one year $ 1,186 $ 1,186 $ 577 $ 577 After one year but within five years 1,195 1,195 2,396 2,397 After five years but within ten years 2 2 4 4 After ten years — — — — Total $ 2,383 $ 2,383 $ 2,977 $ 2,978 Available for Sale Contractual maturity of debt securities: Within one year $ 101,607 $ 100,655 $ 58,478 $ 58,688 After one year but within five years 1,316,874 1,233,725 408,253 410,049 After five years but within ten years 170,513 163,101 10,851 11,011 After ten years 42,897 40,740 51,107 51,775 Total debt securities $ 1,631,891 $ 1,538,221 $ 528,689 $ 531,523
Proceeds from Sales and Realized Losses on Available for Sale Debt Securities	The following is a detail of proceeds from sales and the realized losses on available for sale debt securities: Year Ended December 31, 2022 2021 2020 (Dollars in thousands) Proceeds $ 222,474 $ — $ — Gross losses realized 3,990 — —
Company's Book Value of Pledged Debt Securities	The following table is a summary of the Company’s book value of debt securities that were pledged as collateral for public funds on deposit, repurchase agreements and for other purposes as required or permitted by law: December 31, 2022 2021 (Dollars in thousands) Book value of pledged securities $ 573,952 $ 473,026
Summary of Debt Securities with Unrealized Losses, Segregated by Duration of Unrealized Loss	The following table summarizes debt securities with unrealized losses, segregated by the duration of the unrealized loss, at December 31, 2022 and 2021 respectively: Less than 12 Months More than 12 Months Total Number of investments Estimated Unrealized Estimated Unrealized Estimated Unrealized (Dollars in thousands) December 31, 2022 Available for Sale U.S. treasuries 74 $ 787,925 $ 27,078 $ 689,939 $ 63,621 $ 1,477,864 $ 90,699 U.S. federal agencies 1 — — 349 1 349 1 Mortgage backed securities 92 10,001 1,239 5,055 645 15,056 1,884 States and political subdivisions 8 2,308 184 464 37 2,772 221 Asset backed securities 1 13,010 361 — — 13,010 361 Other securities 3 4,871 291 2,534 467 7,405 758 Total 179 $ 818,115 $ 29,153 $ 698,341 $ 64,771 $ 1,516,456 $ 93,924 December 31, 2021 Available for Sale U.S. treasuries 10 $ 298,080 $ 1,766 $ — $ — $ 298,080 $ 1,766 U.S. federal agencies 1 376 2 — — 376 2 Mortgage backed securities 7 2,824 14 — — 2,824 14 States and political subdivisions 2 505 3 — — 505 3 Other securities 1 2,994 6 — — 2,994 6 Total 21 $ 304,779 $ 1,791 $ — $ — $ 304,779 $ 1,791

Loans Held for Investment and_2

Loans Held for Investment and Allowance for Credit Losses on Loans (Tables)	12 Months Ended
	Dec. 31, 2022
Receivables [Abstract]
Summary of Loans Held for Investment by Portfolio Segment	Loans held for investment are summarized by portfolio segment as follows: December 31, 2022 2021 (Dollars in thousands) Real estate: Commercial real estate owner occupied $ 906,461 $ 775,554 Commercial real estate non-owner occupied 1,385,307 1,095,324 Construction and development < 60 months 481,070 415,466 Construction residential real estate < 60 months 304,432 254,524 Residential real estate first lien 1,119,706 937,006 Residential real estate all other 199,005 161,018 Farmland 261,518 272,179 Commercial and agricultural non-real estate (2) 1,376,375 1,416,093 Consumer non-real estate 447,039 413,370 Oil and gas 462,650 428,908 Total loans (1) $ 6,943,563 $ 6,169,442 (1) Excludes accrued interest receivable of $ 30.6 million at December 31, 2022 and $ 21.0 million at December 31, 2021, that is recorded in accrued interest receivable and other assets. (2) Includes PPP loans held for investment of $ 1.1 million, net of unamortized processing fees of $ 0 at December 31, 2022 and $ 80.4 million, net of unamortized processing fees of $ 2.0 million at December 31, 2021.
Schedule of Portfolio Segments Weighted Average Life, and Measures the Allowance for Credit Losses	The Company has identified the following portfolio segments, which includes the applicable weighted average remaining life, and measures the allowance for credit losses using the vintage loss analysis adjusted for qualitative factors: Portfolio Segments Life (in years) Real estate: Commercial real estate owner occupied 9 Commercial real estate non-owner occupied 6 Construction and development < 60 months 3 Construction residential real estate < 60 months 1 Residential real estate first lien 14 Residential real estate all other 7 Farmland 13 Commercial and agricultural non-real estate 3 Consumer non-real estate 4 Oil and gas 2
Summary of Troubled Debt Restructurings and Other Real Estate Owned and Repossessed Assets	The following is a summary of troubled debt restructurings and other real estate owned and repossessed assets: December 31, 2022 2021 (Dollars in thousands) Troubled debt restructurings $ 2,234 $ 3,665 Other real estate owned and repossessed assets $ 36,936 $ 39,553
Summary of Rental Income and Operating Expenses	This property had the following rental income and operating expenses for the periods presented. For the Twelve Months Ended December 31, 2022 2021 2020 (Dollars in thousands) Rental income $ 10,340 $ 9,975 $ — Operating expense $ 9,863 $ 8,727 $ —
Summary of Amounts Included in Nonaccrual Loans Segregated by Portfolio Segment	The following table is a summary of amounts included in nonaccrual loans, segregated by portfolio segment. December 31, 2022 December 31, 2021 (Dollars in thousands) Real estate: Commercial real estate owner occupied $ 1,795 $ 3,220 Commercial real estate non-owner occupied 667 407 Construction and development < 60 months 93 80 Construction residential real estate < 60 months 430 — Residential real estate first lien 1,947 2,763 Residential real estate all other 55 280 Farmland 1,462 4,224 Commercial and agricultural non-real estate 8,338 8,700 Consumer non-real estate 192 148 Oil and gas 320 1,070 Total $ 15,299 $ 20,892
Age Analysis of Loans Held for Investments	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 an age analysis of our loans held for investment: Age Analysis of Past Due Loans 30-59 60-89 90 Days Total Current Total Loans Accruing (Dollars in thousands) December 31, 2022 Real estate: Commercial real estate owner occupied $ 1,314 $ 1,524 $ 4,580 $ 7,418 $ 899,043 $ 906,461 $ 4,580 Commercial real estate non-owner occupied 6,237 — 42 6,279 1,379,028 1,385,307 43 Construction and development < 60 months 535 40 114 689 480,381 481,070 81 Construction residential real estate < 60 months 1,321 282 148 1,751 302,681 304,432 — Residential real estate first lien 3,415 1,076 844 5,335 1,114,371 1,119,706 349 Residential real estate all other 265 37 185 487 198,518 199,005 166 Farmland 1,346 — 325 1,671 259,847 261,518 114 Commercial and agricultural non-real estate 3,500 2,176 4,712 10,388 1,365,987 1,376,375 1,285 Consumer non-real estate 2,591 648 585 3,824 443,215 447,039 467 Oil and gas 654 — — 654 461,996 462,650 — Total $ 21,178 $ 5,783 $ 11,535 $ 38,496 $ 6,905,067 $ 6,943,563 $ 7,085 December 31, 2021 Real estate: Commercial real estate owner occupied $ 2,046 $ 223 $ 1,465 $ 3,734 $ 771,820 $ 775,554 $ 18 Commercial real estate non-owner occupied 7,244 — — 7,244 1,088,080 1,095,324 — Construction and development < 60 months 136 — — 136 415,330 415,466 — Construction residential real estate < 60 months 2,264 — — 2,264 252,260 254,524 — Residential real estate first lien 3,351 567 2,817 6,735 930,271 937,006 1,704 Residential real estate all other 293 30 451 774 160,244 161,018 431 Farmland 253 37 2,077 2,367 269,812 272,179 139 Commercial and agricultural non-real estate 2,506 546 7,118 10,170 1,405,923 1,416,093 2,418 Consumer non-real estate 1,873 321 272 2,466 410,904 413,370 254 Oil and gas — — — — 428,908 428,908 — Total $ 19,966 $ 1,724 $ 14,200 $ 35,890 $ 6,133,552 $ 6,169,442 $ 4,964
Gross Loans Held for Investment by Year of Origination and Internally Assigned Credit Grades	The following tables summarize our gross loans held for investment by year of origination and internally assigned credit grades as of the period indicated: Term Loans Amortized Cost Basis by Origination Year 2022 2021 2020 2019 2018 Prior Revolving Loans Amortized Cost Basis Total (Dollars in thousands) December 31, 2022 Commercial real estate owner occupied Grade 1 $ 171,615 $ 145,317 $ 106,803 $ 91,892 $ 44,086 $ 119,755 $ 53,026 $ 732,494 Grade 2 34,800 34,283 27,153 18,072 8,528 29,077 14,737 166,650 Grade 3 235 1,718 387 1,334 332 1,161 62 5,229 Grade 4 40 269 — 1,110 180 489 — 2,088 Total commercial real estate owner occupied 206,690 181,587 134,343 112,408 53,126 150,482 67,825 906,461 Commercial real estate non-owner occupied Grade 1 350,425 239,477 170,415 108,095 23,754 66,564 45,172 1,003,902 Grade 2 115,372 50,573 29,031 46,904 24,877 70,686 31,928 369,371 Grade 3 7,677 — 153 2,733 64 1,318 — 11,945 Grade 4 — — — — 42 47 — 89 Total commercial real estate non-owner occupied 473,474 290,050 199,599 157,732 48,737 138,615 77,100 1,385,307 Construction and development < 60 months Grade 1 169,189 92,988 40,187 5,721 3,467 5,071 40,474 357,097 Grade 2 36,042 20,273 1,513 14,368 1,648 774 47,988 122,606 Grade 3 967 — 141 — — 8 158 1,274 Grade 4 — — 33 47 — 13 — 93 Total construction and development < 60 months 206,198 113,261 41,874 20,136 5,115 5,866 88,620 481,070 Construction residential real estate < 60 months Grade 1 210,099 12,824 259 18 — 42 36,114 259,356 Grade 2 39,689 1,152 102 — — 400 2,091 43,434 Grade 3 1,212 — — — — — — 1,212 Grade 4 420 10 — — — — — 430 Total construction residential real estate < 60 months 251,420 13,986 361 18 — 442 38,205 304,432 Residential real estate first lien Grade 1 304,206 205,277 141,807 85,850 56,028 137,254 4,100 934,522 Grade 2 46,433 36,877 25,623 13,414 11,725 37,242 — 171,314 Grade 3 1,940 1,903 1,065 1,689 497 3,889 — 10,983 Grade 4 55 311 175 386 144 1,816 — 2,887 Total residential real estate first lien 352,634 244,368 168,670 101,339 68,394 180,201 4,100 1,119,706 Residential real estate all other Grade 1 31,762 11,012 10,696 5,458 3,607 11,198 42,629 116,362 Grade 2 5,657 1,887 1,744 1,589 1,237 2,574 64,231 78,919 Grade 3 381 186 71 50 201 786 1,828 3,503 Grade 4 — 18 28 32 39 53 51 221 Total residential real estate all other 37,800 13,103 12,539 7,129 5,084 14,611 108,739 199,005 Farmland Grade 1 47,211 33,771 29,454 18,693 10,038 29,724 6,126 175,017 Grade 2 16,140 14,294 6,536 8,855 5,428 14,373 11,281 76,907 Grade 3 2,196 111 2,090 63 141 2,023 1,926 8,550 Grade 4 660 37 55 — 81 211 — 1,044 Total farmland 66,207 48,213 38,135 27,611 15,688 46,331 19,333 261,518 Commercial and agricultural non-real estate Grade 1 303,340 215,247 72,246 53,808 15,410 42,842 316,942 1,019,835 Grade 2 100,010 54,656 20,423 12,914 16,187 3,832 126,503 334,525 Grade 3 6,332 826 1,682 816 1,745 797 5,070 17,268 Grade 4 240 599 1,099 825 410 1,111 199 4,483 Grade 5 — — — 264 — — — 264 Total commercial and agricultural non-real estate 409,922 271,328 95,450 68,627 33,752 48,582 448,714 1,376,375 Consumer non-real estate Grade 1 203,335 104,409 39,822 21,076 6,589 2,187 26,263 403,681 Grade 2 21,078 10,542 3,978 1,541 822 1,351 816 40,128 Grade 3 827 671 405 282 134 63 4 2,386 Grade 4 229 351 54 141 56 13 — 844 Total consumer non-real estate 225,469 115,973 44,259 23,040 7,601 3,614 27,083 447,039 Oil and gas Grade 1 24,938 125,209 16,482 682 1,678 246 199,610 368,845 Grade 2 7,610 10,668 766 23,040 3,167 327 45,240 90,818 Grade 3 2,117 47 5 — — — 498 2,667 Grade 4 — 320 — — — — — 320 Total oil and gas 34,665 136,244 17,253 23,722 4,845 573 245,348 462,650 Total loans held for investment $ 2,264,479 $ 1,428,113 $ 752,483 $ 541,762 $ 242,342 $ 589,317 $ 1,125,067 $ 6,943,563 Term Loans Amortized Cost Basis by Origination Year 2021 2020 2019 2018 2017 Prior Revolving Loans Amortized Cost Basis Total (Dollars in thousands) December 31, 2021 Commercial real estate owner occupied Grade 1 $ 153,887 $ 130,835 $ 113,830 $ 59,163 $ 37,647 $ 102,438 $ 25,128 $ 622,928 Grade 2 35,475 33,198 21,570 8,397 9,936 29,191 9,152 146,919 Grade 3 — 275 605 261 465 1,071 62 2,739 Grade 4 337 600 890 445 — 371 325 2,968 Total commercial real estate owner occupied 189,699 164,908 136,895 68,266 48,048 133,071 34,667 775,554 Commercial real estate non-owner occupied Grade 1 252,718 204,892 114,429 51,440 37,305 118,264 29,257 808,305 Grade 2 53,548 51,206 50,912 38,850 19,466 36,808 24,335 275,125 Grade 3 7,095 — 3,254 121 234 656 — 11,360 Grade 4 407 — — 35 — 92 — 534 Total commercial real estate non-owner occupied 313,768 256,098 168,595 90,446 57,005 155,820 53,592 1,095,324 Construction and development < 60 months Grade 1 173,384 34,351 57,729 9,276 1,953 4,181 32,294 313,168 Grade 2 37,275 7,511 13,161 4,526 803 510 37,153 100,939 Grade 3 1,273 — — 6 — — — 1,279 Grade 4 — — 56 6 18 — — 80 Total construction and development < 60 months 211,932 41,862 70,946 13,814 2,774 4,691 69,447 415,466 Construction residential real estate < 60 months Grade 1 193,311 7,786 41 — 18 29 16,247 217,432 Grade 2 28,170 2,564 — — — 425 5,455 36,614 Grade 3 478 — — — — — — 478 Total construction residential real estate < 60 months 221,959 10,350 41 — 18 454 21,702 254,524 Residential real estate first lien Grade 1 256,834 174,718 99,082 64,949 45,211 128,898 3,928 773,620 Grade 2 44,080 26,073 15,719 12,612 10,926 38,230 — 147,640 Grade 3 1,151 1,266 2,054 1,930 1,155 3,523 — 11,079 Grade 4 64 489 479 1,247 915 1,473 — 4,667 Grade 5 — — — — — — — — Total residential real estate first lien 302,129 202,546 117,334 80,738 58,207 172,124 3,928 937,006 Residential real estate all other Grade 1 16,376 13,320 8,691 5,609 4,101 12,386 30,840 91,323 Grade 2 2,183 2,941 1,919 1,500 895 2,202 55,000 66,640 Grade 3 250 98 112 232 702 309 538 2,241 Grade 4 156 180 — 38 12 84 344 814 Total residential real estate all other 18,965 16,539 10,722 7,379 5,710 14,981 86,722 161,018 Farmland Grade 1 47,485 39,216 23,627 15,180 12,579 29,457 6,946 174,490 Grade 2 16,063 8,702 23,688 5,488 4,159 10,848 10,455 79,403 Grade 3 3,587 4,021 1,514 74 1,293 1,316 3,386 15,191 Grade 4 1,109 379 — 1,121 109 145 232 3,095 Total farmland 68,244 52,318 48,829 21,863 18,140 41,766 21,019 272,179 Commercial and agricultural non-real estate Grade 1 445,864 121,786 95,379 44,593 32,169 43,750 307,361 1,090,902 Grade 2 85,920 30,568 25,097 9,680 2,735 10,821 105,700 270,521 Grade 3 2,995 2,185 1,347 11,479 1,291 599 27,716 47,612 Grade 4 870 221 1,337 654 573 1,109 2,294 7,058 Total commercial and agricultural non-real estate 535,649 154,760 123,160 66,406 36,768 56,279 443,071 1,416,093 Consumer non-real estate Grade 1 201,893 80,616 43,793 17,587 5,723 2,048 20,600 372,260 Grade 2 19,349 7,551 6,119 2,167 816 1,342 996 38,340 Grade 3 1,146 307 551 203 86 31 4 2,328 Grade 4 62 90 199 69 14 8 — 442 Total consumer non-real estate 222,450 88,564 50,662 20,026 6,639 3,429 21,600 413,370 Oil and gas Grade 1 188,072 26,090 6,579 1,257 89 73 139,687 361,847 Grade 2 17,150 9,774 13,909 2,657 170 215 13,186 57,061 Grade 3 6,641 10 — — — 255 2,024 8,930 Grade 4 1,000 — — — — — 70 1,070 Total oil and gas 212,863 35,874 20,488 3,914 259 543 154,967 428,908 Total loans held for investment $ 2,297,658 $ 1,023,819 $ 747,672 $ 372,852 $ 233,568 $ 583,158 $ 910,715 $ 6,169,442
Activity in Allowance for Credit Losses on Loans	The following table details activity in the allowance for credit losses on loans for the period presented. Allocation of a portion of the allowance to one category of loans does not preclude its availability to absorb losses in other categories. Allowance for Credit Losses Balance at Initial allowance on loans purchased with credit deterioration Charge- Recoveries Net Provision Balance at (Dollars in thousands) Year ended December 31, 2022 Real estate: Commercial real estate owner occupied $ 7,568 $ — $ ( 20 ) $ 507 $ 487 $ ( 1,643 ) $ 6,412 Commercial real estate non-owner occupied 16,987 — — — — 13,205 30,192 Construction and development < 60 months 3,490 — ( 93 ) 12 ( 81 ) 369 3,778 Construction residential real estate < 60 months 1,092 — — — — 2,184 3,276 Residential real estate first lien 3,076 2 ( 106 ) 87 ( 19 ) 1,039 4,098 Residential real estate all other 2,104 — ( 38 ) 405 367 ( 626 ) 1,845 Farmland 4,822 — — — — ( 1,312 ) 3,510 Commercial and agricultural non-real estate 28,085 44 ( 1,756 ) 222 ( 1,534 ) 716 27,311 Consumer non-real estate 3,734 25 ( 768 ) 193 ( 575 ) 951 4,135 Oil and gas 12,978 — — — — ( 4,807 ) 8,171 Total $ 83,936 $ 71 $ ( 2,781 ) $ 1,426 $ ( 1,355 ) $ 10,076 $ 92,728 Year ended December 31, 2021 Real estate: Commercial real estate owner occupied $ 8,470 $ 1,080 $ ( 38 ) $ 74 $ 36 $ ( 2,018 ) $ 7,568 Commercial real estate non-owner occupied 12,318 824 ( 803 ) 67 ( 736 ) 4,581 16,987 Construction and development < 60 months 2,723 173 — 12 12 582 3,490 Construction residential real estate < 60 months 726 — — — — 366 1,092 Residential real estate first lien 2,822 126 ( 87 ) 55 ( 32 ) 160 3,076 Residential real estate all other 2,236 — ( 521 ) 52 ( 469 ) 337 2,104 Farmland 3,153 395 ( 889 ) 1 ( 888 ) 2,162 4,822 Commercial and agricultural non-real estate 34,643 5,663 ( 4,643 ) 219 ( 4,424 ) ( 7,797 ) 28,085 Consumer non-real estate 3,542 38 ( 864 ) 326 ( 538 ) 692 3,734 Oil and gas 20,733 — — — — ( 7,755 ) 12,978 Total $ 91,366 $ 8,299 $ ( 7,845 ) $ 806 $ ( 7,039 ) $ ( 8,690 ) $ 83,936
Purchased Credit Deteriorated Loans	The Company has purchased loans, for which there was, at acquisition, evidence of more than insignificant deterioration of credit quality since origination. The purchased credit-deteriorated loans for the period are as follows: Loans acquired with deteriorated credit quality (Dollars in thousands) For the year ended December 31, 2022 Purchase price of loans at acquisition $ 668 Allowance for credit losses at acquisition 71 Par value of acquired loans at acquisition $ 739 For the year ended December 31, 2021 Purchase price of loans at acquisition $ 39,284 Allowance for credit losses at acquisition 8,299 Par value of acquired loans at acquisition $ 47,583
Collateral-Dependent Gross Loans Held for Investment by Collateral Type and Related Specific Allocation	The following table summarizes collateral-dependent gross loans held for investment by collateral type and the related specific allocation as follows: Collateral Type Real Estate Business Assets Energy Reserves Other Assets Total Specific Allocation As of December 31, 2022 (Dollars in thousands) Real estate: Commercial real estate owner occupied $ 2,213 $ — $ — $ — $ 2,213 $ 870 Commercial real estate non-owner occupied 1,263 — — — 1,263 333 Construction and development < 60 months — — — — — — Construction residential real estate < 60 months 420 — — — 420 45 Residential real estate first lien 481 — — — 481 207 Residential real estate all other 9 — — — 9 9 Farmland 3,447 — — — 3,447 831 Commercial and agricultural non-real estate — 6,625 — 3,596 10,221 4,221 Consumer non-real estate — — — 117 117 81 Oil and gas — — — — — — Total collateral-dependent loans held for investment $ 7,833 $ 6,625 $ — $ 3,713 $ 18,171 $ 6,597 Collateral Type Real Estate Business Assets Energy Reserves Other Assets Total Specific Allocation As of December 31, 2021 (Dollars in thousands) Real estate: Commercial real estate owner occupied $ 1,952 $ — $ — $ — $ 1,952 $ 576 Commercial real estate non-owner occupied 1,404 — — — 1,404 263 Construction and development < 60 months — — — — — — Construction residential real estate < 60 months — — — — — — Residential real estate first lien 871 — — — 871 143 Residential real estate all other 199 — — — 199 178 Farmland 8,703 — — — 8,703 1,805 Commercial and agricultural non-real estate — 6,472 — 5,202 11,674 4,938 Consumer non-real estate — — — 54 54 20 Oil and gas — — — — — — Total collateral-dependent loans held for investment $ 13,129 $ 6,472 $ — $ 5,256 $ 24,857 $ 7,923
Transfers from Loans and Premises and Equipment to Other Real Estate Owned, Repossessed Assets and Other Assets	Transfers from loans and premises and equipment to other real estate owned, repossessed assets, and other assets during the periods presented are summarized as follows: Year ended December 31, 2022 2021 2020 (Dollars in thousands) Other real estate owned $ 2,563 $ 12,651 $ 32,093 Repossessed assets 1,040 844 1,418 Other assets 1,943 — 11,105 Total $ 5,546 $ 13,495 $ 44,616
Related Party Loans	A summary of these loans is as follows: Year Ended December 31, Balance Additions Collections/ Terminations Balance (Dollars in thousands) 2022 $ 28,292 $ 46,124 $ ( 51,249 ) $ 23,167 2021 22,057 31,574 ( 25,339 ) 28,292 2020 20,281 19,682 ( 17,906 ) 22,057

Premises and Equipment, Net a_2

Premises and Equipment, Net and Other Assets (Tables)	12 Months Ended
	Dec. 31, 2022
Property, Plant and Equipment [Abstract]
Summary of Premises and Equipment by Classification	The following is a summary of premises and equipment by classification: December 31, Estimated 2022 2021 (Dollars in thousands) Land $ 47,856 $ 44,588 Buildings 10 to 40 years 266,660 256,738 Furniture, fixtures and equipment 3 to 15 years 91,340 89,058 Construction in progress 16,613 12,335 Accumulated depreciation ( 144,381 ) ( 133,672 ) Premises and equipment, net $ 278,088 $ 269,047

Intangible Assets and Goodwill

Intangible Assets and Goodwill (Tables)	12 Months Ended
	Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of Intangible Assets	The following is a summary of intangible assets: Gross Accumulated Net (Dollars in thousands) As of December 31, 2022 Core deposit intangibles $ 33,298 $ ( 13,615 ) $ 19,683 Customer relationship intangibles 3,350 ( 3,050 ) 300 Total $ 36,648 $ ( 16,665 ) $ 19,983 As of December 31, 2021 Core deposit intangibles $ 27,433 $ ( 10,311 ) $ 17,122 Customer relationship intangibles 3,350 ( 2,906 ) 444 Total $ 30,783 $ ( 13,217 ) $ 17,566
Estimated Amortization of Intangible Assets	Estimated amortization of intangible assets for the next five years, as of December 31, 2022, is as follows (dollars in thousands): Estimated Amortization 2023 $ 3,449 2024 3,449 2025 3,223 2026 2,620 2027 2,616
Summary of Goodwill by Business Segment	The following is a summary of goodwill by business segment: Other Executive, Metropolitan Community Financial Operations Banks Banks Pegasus Worthington Services & Support Consolidated (Dollars in thousands) Year Ended December 31, 2022 Balance at beginning of period $ 13,767 $ 61,212 $ 68,855 $ — $ 5,464 $ 624 $ 149,922 Acquisitions — — — 32,133 — — 32,133 Balance at end of period $ 13,767 $ 61,212 $ 68,855 $ 32,133 $ 5,464 $ 624 $ 182,055 Year Ended December 31, 2021 Balance at beginning and end of period $ 13,767 $ 61,212 $ 68,855 $ — $ 5,464 $ 624 $ 149,922

Time Deposits (Tables)

Time Deposits (Tables)	12 Months Ended
	Dec. 31, 2022
Deposits [Abstract]
Schedule of Maturities of Time Deposits	At December 31, 2022, the scheduled maturities of all time deposits are as follows (Dollars in thousands): 2023 $ 553,052 2024 84,859 2025 33,509 2026 21,591 2027 19,902 Thereafter 141 Total $ 713,054
Summary of time Deposits Meet or Exceed Current Federal Deposit Insurance Corporation Insurance Limit for Periods Presented	The following table is a summary of time deposits that meet or exceed the current Federal Deposit Insurance Corporation ("FDIC") insurance limit for the periods presented: December 31, 2022 2021 (Dollars in thousands) Time deposits of $250,000 or more $ 224,517 $ 150,393

Short-Term Borrowings (Tables)

Short-Term Borrowings (Tables)	12 Months Ended
	Dec. 31, 2022
Short-Term Debt [Abstract]
Summary of Short-Term Borrowings	The following is a summary of short-term borrowings: December 31, 2022 2021 (Dollars in thousands) Federal funds purchased $ 300 $ — Weighted average interest rate 1.39 % 0.08 % End of period interest rate 4.30 % 0.10 %

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Components of the Company's Income Tax Expense (Benefit)	The components of the Company’s income tax expense (benefit) are as follows: Year Ended December 31, 2022 2021 2020 (Dollars in thousands) Current taxes: Federal $ 39,197 $ 28,359 $ 25,974 State 4,813 5,365 7,443 Deferred taxes 322 7,044 ( 9,491 ) Total income taxes $ 44,332 $ 40,768 $ 23,926
Reconciliation of Tax Expense at the Federal Statutory Tax Rate	A reconciliation of tax expense at the federal statutory tax rate applied to income before taxes is presented in the following table. The federal statutory tax rate was 21 % in 2022, 2021 and 2020: Year Ended December 31, 2022 2021 2020 (Dollars in thousands) Tax expense at the federal statutory tax rate $ 49,861 $ 43,764 $ 25,937 Increase (decrease) in tax expense from: Tax-exempt income, net ( 337 ) ( 436 ) ( 507 ) Modified endowment life contracts ( 487 ) ( 501 ) ( 508 ) Share based compensation excess tax benefit ( 2,905 ) ( 1,643 ) ( 412 ) Tax deductible dividends paid on ESOP ( 481 ) ( 490 ) ( 453 ) State tax expense, net of federal tax benefit 3,788 4,779 5,606 Bargain purchase gain — ( 1,007 ) — Utilization of tax credits: New markets tax credits, net of tax expense ( 3,745 ) ( 3,192 ) ( 3,121 ) Low-income housing tax credits, net of amortization ( 1,024 ) ( 1,533 ) ( 1,273 ) Other tax credits ( 91 ) ( 379 ) ( 320 ) Other, net ( 247 ) 1,406 ( 1,023 ) Total tax expense $ 44,332 $ 40,768 $ 23,926
Summary of Net Deferred Tax Asset Reported in Other Assets	The net deferred tax asset consisted of the following and is reported in other assets: December 31, 2022 2021 (Dollars in thousands) Unrealized net losses on securities $ 22,107 $ — Provision for credit losses 20,988 17,654 Write-downs of other real estate owned 938 255 Deferred compensation 2,142 2,320 Stock-based compensation 1,643 1,575 Investments in partnership interests 6,056 3,840 Other 1,123 901 Gross deferred tax assets 54,997 26,545 Unrealized net gains on securities — ( 684 ) Premium on securities of banks acquired ( 98 ) ( 120 ) Intangibles ( 6,346 ) ( 5,756 ) Basis difference related to tax credits ( 4,118 ) ( 2,979 ) Depreciation ( 20,360 ) ( 14,545 ) Prepaid expense deducted ( 1,139 ) ( 1,120 ) Other ( 185 ) ( 169 ) Gross deferred tax liabilities ( 32,246 ) ( 25,373 ) Net deferred tax asset $ 22,751 $ 1,172

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]
Summary of Activity Under Stock Option Plan	he following table is a summary of the activity under both the Employee Plan and the Non-Employee Directors’ Plan: Wgtd. Avg. Wgtd. Avg. Remaining Aggregate Exercise Contractual Intrinsic Options Price Term Value (Dollars in thousands, except option data) Year Ended December 31, 2022 Outstanding at December 31, 2021 1,303,250 $ 40.90 Options granted 278,500 87.13 Options exercised ( 241,460 ) 28.06 Options canceled, forfeited, or expired ( 30,000 ) 66.31 Outstanding at December 31, 2022 1,310,290 52.51 8.73 Yrs $ 46,741 Exercisable at December 31, 2022 489,540 30.82 6.80 Yrs $ 28,082 Year Ended December 31, 2021 Outstanding at December 31, 2020 1,343,080 $ 35.28 Options granted 179,500 62.13 Options exercised ( 214,330 ) 23.40 Options canceled, forfeited, or expired ( 5,000 ) 44.23 Outstanding at December 31, 2021 1,303,250 40.90 8.40 Yrs $ 38,656 Exercisable at December 31, 2021 614,875 28.03 7.15 Yrs $ 26,153
Options Exercised Under Stock Option Plan	The following table has additional information regarding options exercised under both the Employee Plan and the Non-Employee Directors’ Plan: Year Ended December 31, 2022 2021 2020 (Dollars in thousands) Total intrinsic value of options exercised $ 14,837 $ 9,264 $ 2,315 Cash received from options exercised 6,776 5,015 1,574 Tax benefit realized from options exercised 3,567 2,360 590
Stock-based Employee Compensation Expense	The following table is a summary of the Company’s recorded stock-based compensation expense: Year Ended December 31, 2022 2021 2020 (Dollars in thousands) Stock-based compensation expense $ 1,941 $ 2,133 $ 1,516 Tax benefit 467 513 386 Stock-based compensation expense, net of tax $ 1,474 $ 1,620 $ 1,130
Unearned Stock-based Compensation Expense	The Company will continue to amortize the unearned stock-based compensation expense over the remaining vesting period of approximately seven years . The following table shows the unearned stock-based compensation expense: December 31, 2022 (Dollars in thousands) Unearned stock-based compensation expense $ 13,200
Assumptions Used for Computing Stock-Based Compensation Expense	he following table shows the assumptions used for computing stock-based compensation expense under the fair value method on options granted during the periods presented: Year Ended December 31, 2022 2021 2020 Weighted average grant-date fair value per share of options granted $ 31.90 $ 21.16 $ 10.85 Risk-free interest rate 1.75 to 4.17 % 1.30 to 1.74 % 0.64 to 1.13 % Dividend yield 2.00 % 2.00 % 2.00 % Stock price volatility 34.61 to 35.60 % 35.55 to 36.39 % 22.84 to 36.1 % Expected term 10 Yrs 10 Yrs 10 Yrs
Summary of Accumulated Stock Units	A summary of the accumulated stock units is as follows: December 31, 2022 2021 Accumulated stock units 129,609 152,754 Average price $ 34.91 $ 30.86

Retirement Plans (Tables)

Retirement Plans (Tables)	12 Months Ended
	Dec. 31, 2022
Retirement Benefits [Abstract]
Aggregate Amounts of Contributions to the 401(k) and ESOP Plans	The aggregate amounts of contributions by the Company to the 401(k) and ESOP are shown in the following table: December 31, 2022 2021 2020 (Dollars in thousands) 401(k) contributions $ 3,011 $ 2,856 $ 2,986 ESOP contributions 4,807 4,317 3,689 Total contributions $ 7,818 $ 7,173 $ 6,675

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2022
Equity [Abstract]
Summary of Authorized Outstanding Preferred and Common Stock	As of December 31, 2022, 2021 and 2020 the Company’s authorized and outstanding preferred and common stock was as follows: No. of Shares Outstanding at December 31, Class of Stock No. of Shares 2022 2021 2020 Par Value Dividends Voting Rights Senior Preferred 10,000,000 — — — $ 1.00 As declared Voting 10% Cumulative Preferred 900,000 — — — 5.00 As declared Non-voting Common 40,000,000 32,875,560 32,603,118 32,719,852 1.00 As declared Voting
Summary of Shares Repurchased Under Stock Purchase Program	The following table is a summary of the shares under the program: Year Ended December 31, 2022 2021 2020 Number of shares repurchased — 212,296 59,284 Average price of shares repurchased $ — $ 54.94 $ 52.26 Shares remaining to be repurchased 500,486 500,486 62,782
Required Capital Amounts and Company's Respective Ratios	The actual and required capital amounts and ratios are shown in the following table: Actual Required For Capital Adequacy Purposes With Capital Conservation Buffer To Be Well Capitalized Under Prompt Corrective Action Provisions Amount Ratio Amount Ratio Amount Ratio Amount Ratio (Dollars in thousands) As of December 31, 2022: Total Capital (to Risk Weighted Assets)- BancFirst Corporation $ 1,298,329 16.61 % $ 625,387 8.00 % $ 820,821 10.50 % N/A N/A BancFirst 1,092,098 16.68 % 523,932 8.00 % 687,661 10.50 % $ 654,916 10.00 % Pegasus 117,445 12.91 % 77,802 8.00 % 95,553 10.50 % 91,003 10.00 % Worthington 47,554 14.09 % 27,006 8.00 % 35,446 10.50 % 33,758 10.00 % Common Equity Tier 1 Capital (to Risk Weighted Assets)- BancFirst Corporation $ 1,120,361 14.33 % $ 351,780 4.50 % $ 547,214 7.00 % N/A N/A BancFirst 991,050 15.13 % 294,712 4.50 % 458,441 7.00 % $ 425,695 6.50 % Pegasus 108,437 11.92 % 40,951 4.50 % 63,702 7.00 % 59,152 6.50 % Worthington 44,207 13.10 % 15,191 4.50 % 23,631 7.00 % 21,943 6.50 % Tier 1 Capital (to Risk Weighted Assets)- BancFirst Corporation $ 1,146,361 14.66 % $ 469,041 6.00 % $ 664,474 8.50 % N/A N/A BancFirst 1,011,050 15.44 % 392,949 6.00 % 556,678 8.50 % $ 523,932 8.00 % Pegasus 108,437 11.92 % 54,602 6.00 % 77,352 8.50 % 72,802 8.00 % Worthington 44,207 13.10 % 20,255 6.00 % 28,694 8.50 % 27,006 8.00 % Tier 1 Capital (to Total Assets)- BancFirst Corporation $ 1,146,361 9.30 % $ 493,191 4.00 % N/A N/A N/A N/A BancFirst 1,011,050 9.72 % 416,004 4.00 % N/A N/A $ 520,005 5.00 % Pegasus 108,437 8.00 % 54,238 4.00 % N/A N/A 67,798 5.00 % Worthington 44,207 8.53 % 20,738 4.00 % N/A N/A 25,922 5.00 % As of December 31, 2021: Total Capital (to Risk Weighted Assets)- BancFirst Corporation $ 1,171,215 17.30 % $ 541,493 8.00 % $ 710,709 10.50 % N/A N/A BancFirst 1,004,835 16.75 % 479,883 8.00 % 629,847 10.50 % $ 599,854 10.00 % Pegasus 88,224 11.62 % 60,765 8.00 % 79,754 10.50 % 75,956 10.00 % Common Equity Tier 1 Capital (to Risk Weighted Assets)- BancFirst Corporation $ 1,002,096 14.80 % $ 304,590 4.50 % $ 473,806 7.00 % N/A N/A BancFirst 909,817 15.17 % 269,934 4.50 % 419,898 7.00 % $ 389,905 6.50 % Pegasus 82,056 10.80 % 34,180 4.50 % 53,170 7.00 % 49,372 6.50 % Tier 1 Capital (to Risk Weighted Assets)- BancFirst Corporation $ 1,028,096 15.19 % $ 406,120 6.00 % $ 575,336 8.50 % N/A N/A BancFirst 929,817 15.50 % 359,913 6.00 % 509,876 8.50 % $ 479,883 8.00 % Pegasus 82,056 10.80 % 45,574 6.00 % 64,563 8.50 % 60,765 8.00 % Tier 1 Capital (to Total Assets)- BancFirst Corporation $ 1,028,096 9.14 % $ 449,847 4.00 % N/A N/A N/A N/A BancFirst 929,817 9.22 % 403,460 4.00 % N/A N/A $ 504,325 5.00 % Pegasus 82,056 6.98 % 47,054 4.00 % N/A N/A 58,817 5.00 %

Net Income Per Common Share (Ta

Net Income Per Common Share (Tables)	12 Months Ended
	Dec. 31, 2022
Earnings Per Share [Abstract]
Basic and Diluted Net Income Per Common Share	Basic and diluted net income per common share are calculated as follows: Income Shares Per Share (Dollars in thousands, except per share data) Year Ended December 31, 2022 Basic Income available to common stockholders $ 193,100 32,778,355 $ 5.89 Dilutive effect of stock options — 661,141 Diluted Income available to common stockholders plus assumed exercises of stock options $ 193,100 33,439,496 $ 5.77 Year Ended December 31, 2021 Basic Income available to common stockholders $ 167,630 32,716,099 $ 5.12 Dilutive effect of stock options — 598,047 Diluted Income available to common stockholders plus assumed exercises of stock options $ 167,630 33,314,146 $ 5.03 Year Ended December 31, 2020 Basic Income available to common stockholders $ 99,586 32,672,522 $ 3.05 Dilutive effect of stock options — 538,430 Diluted Income available to common stockholders plus assumed exercises of stock options $ 99,586 33,210,952 $ 3.00
Average Exercise Price of Options Excluded from Computation of Diluted Net Income Per Common Share	The following table shows the number and average exercise price of options that were excluded from the computation of diluted net income per common share for each year because the options were anti-dilutive for the period. Shares Average Price December 31, 2022 155,316 $ 83.79 December 31, 2021 189,780 60.33 December 31, 2020 402,575 52.72

Condensed Parent Company Fina_2

Condensed Parent Company Financial Statements (Tables)	12 Months Ended
	Dec. 31, 2022
Condensed Financial Information Disclosure [Abstract]
Summary of Balance Sheet of Parent Company	BALANCE SHEETS December 31, 2022 2021 (Dollars in thousands) ASSETS Cash $ 17,806 $ 62,007 Investments in subsidiaries 1,206,246 1,117,622 Goodwill 101,611 69,478 Core deposit premium 12,009 7,627 Dividends receivable 15,682 13,426 Other assets 1,731 1,515 Total assets $ 1,355,085 $ 1,271,675 LIABILITIES AND STOCKHOLDERS’ EQUITY Other liabilities $ 18,205 $ 13,954 Subordinated debt 86,044 85,987 Stockholders’ equity 1,250,836 1,171,734 Total liabilities and stockholders’ equity $ 1,355,085 $ 1,271,675
Summary of Income Statement of Parent Company	STATEMENTS OF INCOME Year Ended December 31, 2022 2021 2020 (Dollars in thousands) OPERATING INCOME Dividends from subsidiaries $ 93,139 $ 54,480 $ 50,872 Interest on interest-bearing deposits 94 41 1 Other 1,338 1,071 886 Total operating income 94,571 55,592 51,759 OPERATING EXPENSE Interest 4,122 3,130 1,965 Other 7,190 3,340 3,317 Total operating expense 11,312 6,470 5,282 Income before taxes and equity in undistributed earnings of subsidiaries 83,259 49,122 46,477 Allocated income tax benefit 5,857 4,191 2,610 Income before equity in undistributed earnings of subsidiaries 89,116 53,313 49,087 Equity in undistributed earnings of subsidiaries 105,817 116,365 51,955 Amortization of stock-based compensation arrangements of subsidiaries ( 1,833 ) ( 2,048 ) ( 1,456 ) Net income $ 193,100 $ 167,630 $ 99,586
Summary of Cash Flow of Parent Company	STATEMENTS OF CASH FLOW Year Ended December 31, 2022 2021 2020 (Dollars in thousands) CASH FLOWS FROM OPERATING ACTIVITIES Net income $ 193,100 $ 167,630 $ 99,586 Adjustments to reconcile to net cash provided by operating activities: Equity in undistributed earnings of subsidiaries ( 105,817 ) ( 116,365 ) ( 51,955 ) Amortization of stock-based compensation arrangements of subsidiaries 1,833 2,048 1,456 Other, net 3,815 5,056 188 Net cash provided by operating activities 92,931 58,369 49,275 INVESTING ACTIVITIES Payments for investments in subsidiaries ( 94,967 ) ( 9,000 ) ( 1,000 ) Other, net ( 1,352 ) 4,429 ( 1,175 ) Net cash used in investing activities ( 96,319 ) ( 4,571 ) ( 2,175 ) FINANCING ACTIVITIES Issuance of common stock 7,649 2,260 1,790 Common stock acquired — ( 11,663 ) ( 3,098 ) Net cash settlement of options — ( 5,479 ) — Cash dividends paid ( 48,462 ) ( 45,140 ) ( 42,472 ) Proceeds from the issuance of subordinated notes, net of debt issuance costs — 59,150 — Net cash used in financing activities ( 40,813 ) ( 872 ) ( 43,780 ) Net (decrease) increase in cash and due from banks ( 44,201 ) 52,926 3,320 Cash and due from banks at the beginning of the period 62,007 9,081 5,761 Cash and due from banks at the end of the period $ 17,806 $ 62,007 $ 9,081 SUPPLEMENTAL DISCLOSURE Cash paid during the period for interest $ 4,122 $ 3,130 $ 1,966 Cash received during the period for income taxes, net $ 6,667 $ 4,411 $ 2,812

Commitments and Contingent Li_2

Commitments and Contingent Liabilities (Tables)	12 Months Ended
	Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Summary of Financial Instruments with Off-Balance-Sheet Risks	The amounts of financial instruments with off-balance-sheet risk are as follows: December 31, 2022 2021 (Dollars in thousands) Loan commitments $ 2,627,552 $ 2,084,706 Stand-by letters of credit 72,237 82,841

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2022
Leases [Abstract]
Schedule of Rent Expense of Operating Leases	Rental expense on all operating leases, including those rented on a monthly or temporary basis were as follows (Dollars in thousands): Year Ending December 31: 2022 $ 1,865 2021 1,560 2020 1,894
Schedule of Minimum Future Commitments of Operating Leases	The following table presents minimum future commitments by year for the Company’s operating leases. Such commitments are reflected as undiscounted values and are reconciled to the discounted present value recognized on the consolidated balance sheet. December 31, 2022 (Dollars in thousands) 2023 $ 1,716 2024 1,358 2025 1,097 2026 696 2027 341 Thereafter 1,011 Total lease payments 6,219 Less imputed interest ( 794 ) Operating lease liability $ 5,425
Scheduled of Minimum Future Contractual Rent To be Received Under The Remaining Non-Cancelable Term of Operating Leases	The following table presents the scheduled minimum future contractual rent to be received under the remaining non-cancelable term of the operating leases: December 31, 2022 (Dollars in thousands) 2023 $ 3,137 2024 2,874 2025 2,154 2026 1,778 2027 1,350 2028-2031 2,197 Total future minimum lease payments $ 13,490

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2022
Fair Value Disclosures [Abstract]
Fair Value of Financial Assets and Liabilities Measured on Recurring Basis	The following table summarizes financial assets and financial liabilities measured at fair value on a recurring basis as of the periods presented, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value: Level 1 Inputs Level 2 Inputs Level 3 Inputs Total Fair Value (Dollars in thousands) December 31, 2022 Debt securities available for sale: U.S. Treasury $ 1,477,864 $ — $ — $ 1,477,864 U.S. federal agencies — 15,222 — 15,222 Mortgage-backed securities — 16,586 — 16,586 States and political subdivisions — 7,680 454 8,134 Asset backed securities — 13,010 — 13,010 Other debt securities — 7,405 — 7,405 Derivative assets — 20,745 — 20,745 Derivative liabilities — 19,683 — 19,683 December 31, 2021 Debt securities available for sale: U.S. Treasury $ 457,628 $ — $ — $ 457,628 U.S. federal agencies — 21,942 — 21,942 Mortgage-backed securities — 29,283 — 29,283 States and political subdivisions — 5,999 320 6,319 Asset backed securities — 13,357 — 13,357 Other debt securities — 2,994 — 2,994 Derivative assets — 8,946 — 8,946 Derivative liabilities — 8,237 — 8,237
Changes in Level 3 Assets Measured at Estimated Fair Value on Recurring Basis	The changes in Level 3 assets measured at estimated fair value on a recurring basis during the periods presented were as follows: Twelve Months Ended 2022 2021 (Dollars in thousands) Balance at the beginning of the year $ 320 $ 12,869 Transfers to level 2 — ( 12,714 ) Purchases 255 240 Settlements ( 110 ) ( 75 ) Total unrealized losses ( 11 ) — Balance at the end of the period $ 454 $ 320
Assets Measured at Fair Value on Nonrecurring Basis	Total Fair Value (Dollars in thousands) As of and for the Year-to-date Period Ended December 31, 2022 Equity securities $ 15,512 Collateral dependent loans 1,618 Repossessed assets 180 Other real estate owned 34,999 As of and for the Year-to-date Period Ended December 31, 2021 Equity securities $ 10,590 Collateral dependent loans 13,195 Repossessed assets 78 Other real estate owned 7,496
Estimated Fair Values of Financial Instruments	he estimated fair values of the Company’s financial instruments that are reported at amortized cost in the Company’s consolidated balance sheets, segregated by the level of valuation inputs within the fair value hierarchy utilized to measure fair value, are as follows: December 31, 2022 2021 Carrying Fair Value Carrying Fair Value (Dollars in thousands) FINANCIAL ASSETS Level 2 inputs: Cash and cash equivalents $ 3,168,910 $ 3,168,910 $ 2,050,022 $ 2,050,022 Federal funds sold 2,850 2,850 800 800 Debt securities held for investment 13 13 32 33 Loans held for sale 6,232 6,232 24,776 24,776 Level 3 inputs: Debt securities held for investment 2,370 2,370 2,945 2,945 Loans held for investment, net of allowance for credit losses 6,850,835 6,563,755 6,085,506 6,059,716 FINANCIAL LIABILITIES Level 2 inputs: Deposits 10,974,228 10,614,840 8,091,914 8,161,553 Short-term borrowings 300 300 — — Subordinated debt 86,044 82,385 85,987 90,391 OFF-BALANCE SHEET FINANCIAL INSTRUMENTS Loan commitments 4,598 3,648 Letters of credit 542 621

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Summary of Notional Amounts and Estimated Fair Values of Oil and Gas Derivative Positions Outstanding	The Company utilizes dealer quotations and observable market data inputs to substantiate internal valuation models. The notional amounts and estimated fair values of oil and gas derivative positions outstanding are presented in the following table: December 31, 2022 2021 Oil and Natural Gas Swaps and Options Notional Units Notional Estimated Notional Estimated (Notional amounts and dollars in thousands) Oil Derivative assets Barrels 2,698 $ 8,868 2,585 $ 6,563 Derivative liabilities Barrels ( 2,698 ) ( 8,259 ) ( 2,585 ) ( 6,129 ) Gas/Natural Gas Liquids Derivative assets MMBTUs/Gallons 25,059 11,877 19,752 2,383 Derivative liabilities MMBTUs/Gallons ( 25,059 ) ( 11,424 ) ( 19,752 ) ( 2,108 ) Total Fair Value Included in Derivative assets Other assets 20,745 8,946 Derivative liabilities Other liabilities ( 19,683 ) ( 8,237 )
Summary of Company's Recognized Income Related to Activity Included in Other Noninterest Income	The following table is a summary of the Company’s recognized income related to the activity, which was included in other noninterest income: Year Ended December 31, 2022 2021 2020 (Dollars in thousands) Derivative income $ 416 $ 266 $ 50
Summary of Company's Net Credit Exposure Relating to Oil and Gas Swaps and Options with Bank Counterparties	The following table is a summary of the Company’s net credit exposure relating to oil and gas swaps and options with bank counterparties: December 31, 2022 2021 (Dollars in thousands) Credit exposure $ 6,560 $ —

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2022
Segment Reporting [Abstract]
Results of Operations and Selected Financial Information	The results of operations and selected financial information for the six business units are as follows: BancFirst Metropolitan BancFirst Community Pegasus Worthington Other Executive, Eliminations Consolidated (Dollars in thousands) December 31, 2022 Net interest income $ 97,728 $ 208,728 $ 46,439 $ 14,919 $ 8,065 $ ( 2,226 ) $ 20 $ 373,673 Provision for/(benefit from) credit losses 2,186 2,451 2,840 ( 43 ) ( 161 ) 2,803 — 10,076 Noninterest income 32,756 72,385 1,026 1,034 50,643 223,844 ( 197,941 ) 183,747 Depreciation and amortization 2,821 10,453 789 398 519 7,068 — 22,048 Other expenses 42,583 117,248 19,013 9,280 36,271 64,325 ( 856 ) 287,864 Income before taxes $ 82,894 $ 150,961 $ 24,823 $ 6,318 $ 22,079 $ 147,422 $ ( 197,065 ) $ 237,432 Total assets $ 3,412,369 $ 6,886,066 $ 1,404,033 $ 541,002 $ 171,679 $ 1,473,443 $ ( 1,500,729 ) $ 12,387,863 Capital expenditures $ 2,026 $ 10,146 $ 311 $ 262 $ 67 $ 6,973 $ — $ 19,785 December 31, 2021 Net interest income $ 77,840 $ 180,925 $ 24,222 $ — $ 35,244 $ ( 3,295 ) $ 721 $ 315,657 (Benefit from)/provision for credit losses ( 5,474 ) ( 4,694 ) 1,395 — 109 ( 26 ) — ( 8,690 ) Noninterest income 23,257 65,600 1,448 — 47,124 203,005 ( 170,402 ) 170,032 Depreciation and amortization 2,593 10,483 782 — 557 5,626 — 20,041 Other expenses 39,356 110,574 15,317 — 60,435 41,199 ( 941 ) 265,940 Income before taxes $ 64,622 $ 130,162 $ 8,176 $ — $ 21,267 $ 152,911 $ ( 168,740 ) $ 208,398 Total assets $ 2,627,874 $ 5,821,220 $ 1,045,699 $ — $ 71,694 $ 1,201,974 $ ( 1,362,849 ) $ 9,405,612 Capital expenditures $ 1,612 $ 7,390 $ 363 $ — $ 400 $ 17,486 $ — $ 27,251 December 31, 2020 Net interest income $ 85,464 $ 175,757 $ 21,360 $ — $ 23,500 $ 79 $ 508 $ 306,668 Provision for credit losses 30,202 29,827 1,916 — 562 141 — 62,648 Noninterest income 18,664 60,386 1,071 — 41,549 118,491 ( 102,939 ) 137,222 Depreciation and amortization 2,639 10,603 760 — 500 3,922 — 18,424 Other expenses 36,746 111,341 13,831 — 44,918 33,588 ( 1,118 ) 239,306 Income before taxes $ 34,541 $ 84,372 $ 5,924 $ — $ 19,069 $ 80,919 $ ( 101,313 ) $ 123,512 Total assets $ 2,729,886 $ 5,527,611 $ 919,572 $ — $ 137,122 $ 1,073,507 $ ( 1,175,341 ) $ 9,212,357 Capital expenditures $ 1,087 $ 9,946 $ 1,775 $ — $ 450 $ 53,188 $ — $ 66,446

Description of Business and S_3

Description of Business and Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Days from origination after which mortgage loans are sold	30 days
Loan upon which a default of principal or interest has existed for a period	90 days
Accrued interest receivable	$ 30,600,000	$ 21,000,000
Accrued Interest and reversed against interest income	$ 147,000	83,000	$ 841,000,000,000
Intangible assets, Estimated useful lives	6 years 7 months 6 days
Advertising costs	$ 3,000,000	3,000,000	3,300,000
Revenue recognition, description of performance obligation	the Company offers various services to customers that generate revenue. Contract performance typically occurs in one year or less.
Incremental cost of obtaining contract	true
Revenue recognition, description of payment terms	Revenue is recognized when the transactions occur or as services are performed over primarily monthly or quarterly periods. Payment is typically received in the period the transactions occur, or in some cases, within 90 days of the service period.
Delinquency period placed on nonaccrual status loan	90 days
Commercial loans are charged off deemed uncollectible period	180 days
Paycheck Protection Program, CARES Act [Member] | Small Business Administration (SBA) [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Percentage of processing fees	5%
Unamortized balances of fees	$ 0	2,000,000
Processing fees received from the SBA		$ 23,800,000	$ 30,200,000
U.S. Treasury or U.S. Government-sponsored Entities and Agencies [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Percentage of available for sale securities held	98%	98%
Core Deposit Intangibles [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Intangible assets, Estimated useful lives	6 years 8 months 12 days
Core Deposit Intangibles [Member] | Minimum [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Intangible assets, Estimated useful lives	7 years
Core Deposit Intangibles [Member] | Maximum [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Intangible assets, Estimated useful lives	10 years
Customer Relationship Intangibles [Member] | Minimum [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Intangible assets, Estimated useful lives	3 years
Customer Relationship Intangibles [Member] | Maximum [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Intangible assets, Estimated useful lives	18 years

Recent Developments Including M

Recent Developments Including Mergers and Acquisitions - Additional Information (Detail) $ in Thousands	Feb. 08, 2022 USD ($) Location	Jun. 17, 2021 USD ($)	May 20, 2021 USD ($) Location	Jan. 22, 2021 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Business Combination Separately Recognized Transactions [Line Items]
Total assets					$ 12,387,863	$ 9,405,612	$ 9,212,357
Loans held for investment (net of unearned interest)					6,943,563	6,169,442
Deposits					10,974,228	8,091,914
Business Combination, Bargain Purchase, Gain, Statement of Income or Comprehensive Income [Extensible Enumeration]			Noninterest Income, Other
Goodwill					$ 182,055	$ 149,922
Oklahoma [Member]
Business Combination Separately Recognized Transactions [Line Items]
Sale of Loans				$ 21,000
Deposits sold				38,000
Oklahoma [Member] | Noninterest Income [Member]
Business Combination Separately Recognized Transactions [Line Items]
Gain on transaction				$ 2,500
First National Bank and Trust [Member]
Business Combination Separately Recognized Transactions [Line Items]
Total assets			$ 284,000
Loans held for investment (net of unearned interest)			195,000
Deposits			256,000
Purchase price			21,000
Bargain purchase gain			4,800
Purchase expenses			4,800
Intangibles assets, net			$ 1,700
First National Bank and Trust [Member] | Oklahoma [Member]
Business Combination Separately Recognized Transactions [Line Items]
Number of banking locations | Location			2
Subordinated Notes due 2036 [Member] | Private Placement [Member]
Business Combination Separately Recognized Transactions [Line Items]
Aggregate principal amount		$ 60,000
Fixed-to-floating rate		3.50%
Debt instrument maturity year		2036
Worthington [Member]
Business Combination Separately Recognized Transactions [Line Items]
Total assets	$ 478,000
Loans held for investment (net of unearned interest)	257,000
Deposits	430,000
Purchase price	77,700
Intangibles assets, net	5,900
Goodwill	$ 32,100
Worthington [Member] | Arlington, Texas [Member]
Business Combination Separately Recognized Transactions [Line Items]
Number of banking locations | Location	1
Worthington [Member] | Colleyville, Texas [Member]
Business Combination Separately Recognized Transactions [Line Items]
Number of banking locations | Location	1
Worthington [Member] | Fort Worth, Texas [Member]
Business Combination Separately Recognized Transactions [Line Items]
Number of banking locations | Location	2

Cash Due from Banks, Interest-B

Cash Due from Banks, Interest-Bearing Deposits and Federal Funds Sold - Summary of Vault Cash and Funds on Deposit with Federal Reserve Bank (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Average Amount Of Required Reserves [Abstract]
Vault cash and funds on deposit with the Federal Reserve Bank	$ 2,942,665	$ 1,907,482

Securities - Summary of Amortiz

Securities - Summary of Amortized Cost and Estimated Fair Values of Debt Securities Held for Investment (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 2,383	$ 2,977
Gross Unrealized Gains		1
Estimated Fair Value	2,383	2,978
Mortgage Backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	13	32
Gross Unrealized Gains		1
Estimated Fair Value	13	33
States and Political Subdivisions [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	1,870	2,445
Estimated Fair Value	1,870	2,445
Other Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	500	500
Estimated Fair Value	$ 500	$ 500

Securities - Summary of Amort_2

Securities - Summary of Amortized Cost and Estimated Fair Values of Debt Securities Available for Sale (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 1,631,891	$ 528,689
Gross Unrealized Gains	254	4,625
Gross Unrealized Losses	(93,924)	(1,791)
Estimated Fair Value	1,538,221	531,523
U.S. Treasuries [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,568,563	455,701
Gross Unrealized Gains		3,693
Gross Unrealized Losses	(90,699)	(1,766)
Estimated Fair Value	1,477,864	457,628
U.S. Federal Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	15,025	21,609
Gross Unrealized Gains	198	335
Gross Unrealized Losses	(1)	(2)
Estimated Fair Value	15,222	21,942
Mortgage Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	18,449	28,897
Gross Unrealized Gains	21	400
Gross Unrealized Losses	(1,884)	(14)
Estimated Fair Value	16,586	29,283
States and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	8,320	6,128
Gross Unrealized Gains	35	194
Gross Unrealized Losses	(221)	(3)
Estimated Fair Value	8,134	6,319
Asset backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	13,371	13,354
Gross Unrealized Gains		3
Gross Unrealized Losses	(361)
Estimated Fair Value	13,010	13,357
Other Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	8,163	3,000
Gross Unrealized Losses	(758)	(6)
Estimated Fair Value	$ 7,405	$ 2,994

Securities - Additional Informa

Securities - Additional Information (Detail) - USD ($)	1 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Aug. 25, 2022	Jan. 10, 2022
Debt Securities, Available-for-Sale [Line Items]
Proceeds from sales of available for sale securities		$ 222,474,000	$ 0	$ 0
Avaliable for sale of debt securities realized gains or losses			$ 0	$ 0
Reinvested in debt securities	$ 220,000,000
Reinvested debt securities, average yield percentage	1.86%
Sale of low yielding securities	$ 226,000,000
Debt securities. average yield percentage	0.16%
Gross losses realized		$ 3,990,000
United States Treasury Notes [Member]
Debt Securities, Available-for-Sale [Line Items]
Debt securities purchased at par value					$ 300,000,000	$ 600,000,000
Debt securities. average yield percentage					3.27%	1.42%
Debt securities, average maturity term					58 months	53 months

Securities - Maturity of Debt S

Securities - Maturity of Debt Securities (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Held for Investment, Contractual maturity of debt securities, Amortized Cost
Amortized cost, Within one year	$ 1,186	$ 577
Amortized cost, After one year but within five years	1,195	2,396
Amortized cost, After five years but within ten years	2	4
Amortized Cost	2,383	2,977
Available for sale, Contractual maturity of debt securities, Amortized Cost
Amortized Cost, Within one year	101,607	58,478
Amortized Cost, After one year but within five years	1,316,874	408,253
Amortized Cost, After five years but within ten years	170,513	10,851
Amortized Cost, After ten years	42,897	51,107
Amortized Cost	1,631,891	528,689
Held for Investment, Contractual maturity of debt securities, Estimated Fair Value
Estimated Fair Value, Within one year	1,186	577
Estimated Fair Value, After one year but within five years	1,195	2,397
Estimated Fair Value, After five years but within ten years	2	4
Estimated Fair Value	2,383	2,978
Available for sale, Contractual maturity of debt securities, Estimated Fair Value
Estimated Fair Value, Within one year	100,655	58,688
Estimated Fair Value, After one year but within five years	1,233,725	410,049
Estimated Fair Value, After five years but within ten years	163,101	11,011
Estimated Fair Value, After ten years	40,740	51,775
Total debt securities	$ 1,538,221	$ 531,523

Securities - Company's Book Val

Securities - Company's Book Value of Pledged Debt Securities (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Financial Instruments Owned and Pledged as Collateral [Line Items]
Book value of pledged securities		$ 220,000
Asset Pledged as Collateral without Right [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Book value of pledged securities	$ 573,952		$ 473,026

Securities - Proceeds from Sale

Securities - Proceeds from Sales and Realized Losses on Available for Sale Debt Securities (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Proceeds	$ 222,474,000	$ 0	$ 0
Gross losses realized	$ 3,990,000

Securities - Summary of Debt Se

Securities - Summary of Debt Securities with Unrealized Losses, Segregated by Duration of Unrealized Loss (Detail) $ in Thousands	Dec. 31, 2022 USD ($) Investments	Dec. 31, 2021 USD ($) Investments
Available for Sale
Number of investments | Investments	179	21
Available-for-sale Securities, Less than 12 Months, Fair Value	$ 818,115	$ 304,779
Available-for-sale Securities, Less than 12 Months, Unrealized Losses	29,153	1,791
Available-for-sale Securities, 12 Months or Longer, Fair Value	698,341
Available-for-sale Securities, 12 Months or Longer, Unrealized Losses	64,771
Available-for-sale Securities, Fair Value, Total	1,516,456	304,779
Available-for-sale Securities, Unrealized Losses, Total	$ 93,924	$ 1,791
U.S. Treasuries [Member]
Available for Sale
Number of investments | Investments	74	10
Available-for-sale Securities, Less than 12 Months, Fair Value	$ 787,925	$ 298,080
Available-for-sale Securities, Less than 12 Months, Unrealized Losses	27,078	1,766
Available-for-sale Securities, 12 Months or Longer, Fair Value	689,939
Available-for-sale Securities, 12 Months or Longer, Unrealized Losses	63,621
Available-for-sale Securities, Fair Value, Total	1,477,864	298,080
Available-for-sale Securities, Unrealized Losses, Total	$ 90,699	$ 1,766
U.S. Federal Agencies [Member]
Available for Sale
Number of investments | Investments	1	1
Available-for-sale Securities, Less than 12 Months, Fair Value		$ 376
Available-for-sale Securities, Less than 12 Months, Unrealized Losses		2
Available-for-sale Securities, 12 Months or Longer, Fair Value	$ 349
Available-for-sale Securities, 12 Months or Longer, Unrealized Losses	1
Available-for-sale Securities, Fair Value, Total	349	376
Available-for-sale Securities, Unrealized Losses, Total	$ 1	$ 2
Mortgage Backed Securities [Member]
Available for Sale
Number of investments | Investments	92	7
Available-for-sale Securities, Less than 12 Months, Fair Value	$ 10,001	$ 2,824
Available-for-sale Securities, Less than 12 Months, Unrealized Losses	1,239	14
Available-for-sale Securities, 12 Months or Longer, Fair Value	5,055
Available-for-sale Securities, 12 Months or Longer, Unrealized Losses	645
Available-for-sale Securities, Fair Value, Total	15,056	2,824
Available-for-sale Securities, Unrealized Losses, Total	$ 1,884	$ 14
States and Political Subdivisions [Member]
Available for Sale
Number of investments | Investments	8	2
Available-for-sale Securities, Less than 12 Months, Fair Value	$ 2,308	$ 505
Available-for-sale Securities, Less than 12 Months, Unrealized Losses	184	3
Available-for-sale Securities, 12 Months or Longer, Fair Value	464
Available-for-sale Securities, 12 Months or Longer, Unrealized Losses	37
Available-for-sale Securities, Fair Value, Total	2,772	505
Available-for-sale Securities, Unrealized Losses, Total	$ 221	$ 3
Asset backed Securities [Member]
Available for Sale
Number of investments | Investments	1
Available-for-sale Securities, Less than 12 Months, Fair Value	$ 13,010
Available-for-sale Securities, Less than 12 Months, Unrealized Losses	361
Available-for-sale Securities, Fair Value, Total	13,010
Available-for-sale Securities, Unrealized Losses, Total	$ 361
Other Securities [Member]
Available for Sale
Number of investments | Investments	3	1
Available-for-sale Securities, Less than 12 Months, Fair Value	$ 4,871	$ 2,994
Available-for-sale Securities, Less than 12 Months, Unrealized Losses	291	6
Available-for-sale Securities, 12 Months or Longer, Fair Value	2,534
Available-for-sale Securities, 12 Months or Longer, Unrealized Losses	467
Available-for-sale Securities, Fair Value, Total	7,405	2,994
Available-for-sale Securities, Unrealized Losses, Total	$ 758	$ 6

Loans Held for Investment and_3

Loans Held for Investment and Allowance for Credit Losses on Loans - Summary of Loans Held for Investment by Portfolio Segment (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment (net of unearned interest)	$ 6,943,563	$ 6,169,442
Farmland [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment (net of unearned interest)	261,518
Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment (net of unearned interest)	6,943,563
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment (net of unearned interest)	906,461	775,554
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment (net of unearned interest)	1,385,307	1,095,324
Real Estate [Member] | Construction and Development Less than 60 Months [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment (net of unearned interest)	481,070	415,466
Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment (net of unearned interest)	304,432	254,524
Real Estate [Member] | Residential Real Estate First Lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment (net of unearned interest)	1,119,706	937,006
Real Estate [Member] | Residential Real Estate All Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment (net of unearned interest)	199,005	161,018
Real Estate [Member] | Farmland [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment (net of unearned interest)	261,518	272,179
Commercial and Agricultural Non-Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment (net of unearned interest)	1,376,375	1,416,093
Consumer Non-real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment (net of unearned interest)	447,039	413,370
Oil and Gas [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment (net of unearned interest)	$ 462,650	$ 428,908

Loans Held for Investment and_4

Loans Held for Investment and Allowance for Credit Losses on Loans - Summary of Loans Held for Investment by Portfolio Segment (Parenthetical) (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Receivables [Abstract]
Accrued interest receivable	$ 30.6	$ 21
Pay check protection program loan held for investment	1.1	80.4
Paycheck protection program unamortized processing fees	$ 0	$ 2

Loans Held for Investment and_5

Loans Held for Investment and Allowance for Credit Losses on Loans - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable Recorded Investment [Line Items]
Total loans	$ 6,943,563,000	$ 6,169,442,000
Paycheck protection program amortized processing fees recognized as interest income	2,100,000	36,400,000
Paycheck protection program unamortized processing fees	0	2,000,000
Gains on sale of property held in other real estate owned	4,200,000	618,000	$ 2,400,000
Write down of property held in other real estate owned	3,700,000	538,000	558,000
Interest income recognized on nonaccrual loans	0	0	0
Nonaccrual loans with no related allowance for credit losses	0	0
Interest income that would have been recognized	1,300,000	2,200,000	2,800,000
Provision for (benefit from) credit losses	10,076,000	(8,690,000)	$ 62,648,000
Interest income recognized on collateral-dependent loans	0	0
Commercial Real Estate
Financing Receivable Recorded Investment [Line Items]
Loans modification	47,600,000	53,900,000
Commercial Real Estate | Other Real Estate Owned [Member]
Financing Receivable Recorded Investment [Line Items]
Other real estate	29,400,000	29,500,000
U.S. Federal Agencies [Member]
Financing Receivable Recorded Investment [Line Items]
Nonaccrual loans guaranteed by government agencies	$ 4,700,000	3,300,000
Previous Corporate Headquarters [Member] | Other Real Estate Owned [Member]
Financing Receivable Recorded Investment [Line Items]
Other real estate		$ 2,400,000
BancFirst [Member]
Financing Receivable Recorded Investment [Line Items]
Loan percentage	82%
Pegasus and Worthington [Member]
Financing Receivable Recorded Investment [Line Items]
Loan percentage	18%
Parent Company [Member]
Financing Receivable Recorded Investment [Line Items]
Percentage of loans secured by real estate	67%

Loans Held for Investment and_6

Loans Held for Investment and Allowance for Credit Losses on Loans - Schedule of Portfolio Segments Weighted Average Life, and Measures the Allowance for Credit Losses (Detail) - ASC 326 [Member]	12 Months Ended
	Dec. 31, 2022
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loan Segment, Life (in years)	9 years
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loan Segment, Life (in years)	6 years
Real Estate [Member] | Construction and Development Less than 60 Months [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loan Segment, Life (in years)	3 years
Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loan Segment, Life (in years)	1 year
Real Estate [Member] | Residential Real Estate First Lien [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loan Segment, Life (in years)	14 years
Real Estate [Member] | Residential Real Estate All Other [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loan Segment, Life (in years)	7 years
Real Estate [Member] | Farmland [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loan Segment, Life (in years)	13 years
Commercial and Agricultural Non-Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loan Segment, Life (in years)	3 years
Consumer Non-real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loan Segment, Life (in years)	4 years
Oil and Gas [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loan Segment, Life (in years)	2 years

Loans Held for Investment and_7

Loans Held for Investment and Allowance for Credit Losses on Loans - Summary of Troubled Debt Restructurings and Other Real Estate Owned and Repossessed Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Summary Of Nonperforming And Restructured Assets [Abstract]
Troubled debt restructurings	$ 2,234	$ 3,665
Other real estate owned and repossessed assets	$ 36,936	$ 39,553

Loans Held for Investment and_8

Loans Held for Investment and Allowance for Credit Losses on Loans - Summary of Rental Income and Operating Expenses (Details) - Commercial Real Estate [Member] - Real Estate Investment [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Rental income	$ 10,340	$ 9,975
Operating expense	$ 9,863	$ 8,727

Loans Held for Investment and_9

Loans Held for Investment and Allowance for Credit Losses on Loans - Summary of Amounts Included in Nonaccrual Loans Segregated by Portfolio Segment (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total	$ 15,299	$ 20,892
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total	1,795	3,220
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total	667	407
Real Estate [Member] | Construction and Development Less than 60 Months [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total	93	80
Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total	430
Real Estate [Member] | Residential Real Estate First Lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total	1,947	2,763
Real Estate [Member] | Residential Real Estate All Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total	55	280
Real Estate [Member] | Farmland [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total	1,462	4,224
Commercial and Agricultural Non-Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total	8,338	8,700
Consumer Non-real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total	192	148
Oil and Gas [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total	$ 320	$ 1,070

Loans Held for Investment an_10

Loans Held for Investment and Allowance for Credit Losses on Loans - Age Analysis of Loans Held for Investments (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	$ 6,943,563	$ 6,169,442
Accruing Loans 90 Days or More Past Due	7,085	4,964
Farmland [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	261,518
Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	6,943,563
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	906,461	775,554
Accruing Loans 90 Days or More Past Due	4,580	18
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	1,385,307	1,095,324
Accruing Loans 90 Days or More Past Due	43
Real Estate [Member] | Construction and Development Less than 60 Months [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	481,070	415,466
Accruing Loans 90 Days or More Past Due	81
Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	304,432	254,524
Real Estate [Member] | Residential Real Estate First Lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	1,119,706	937,006
Accruing Loans 90 Days or More Past Due	349	1,704
Real Estate [Member] | Residential Real Estate All Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	199,005	161,018
Accruing Loans 90 Days or More Past Due	166	431
Real Estate [Member] | Farmland [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	261,518	272,179
Accruing Loans 90 Days or More Past Due	114	139
Commercial and Agricultural Non-Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	1,376,375	1,416,093
Accruing Loans 90 Days or More Past Due	1,285	2,418
Consumer Non-real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	447,039	413,370
Accruing Loans 90 Days or More Past Due	467	254
Oil and Gas [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	462,650	428,908
30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	21,178	19,966
30 to 59 Days Past Due [Member] | Real Estate [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	1,314	2,046
30 to 59 Days Past Due [Member] | Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	6,237	7,244
30 to 59 Days Past Due [Member] | Real Estate [Member] | Construction and Development Less than 60 Months [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	535	136
30 to 59 Days Past Due [Member] | Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	1,321	2,264
30 to 59 Days Past Due [Member] | Real Estate [Member] | Residential Real Estate First Lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	3,415	3,351
30 to 59 Days Past Due [Member] | Real Estate [Member] | Residential Real Estate All Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	265	293
30 to 59 Days Past Due [Member] | Real Estate [Member] | Farmland [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	1,346	253
30 to 59 Days Past Due [Member] | Commercial and Agricultural Non-Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	3,500	2,506
30 to 59 Days Past Due [Member] | Consumer Non-real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	2,591	1,873
30 to 59 Days Past Due [Member] | Oil and Gas [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	654
60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	5,783	1,724
60 to 89 Days Past Due [Member] | Real Estate [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	1,524	223
60 to 89 Days Past Due [Member] | Real Estate [Member] | Construction and Development Less than 60 Months [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	40
60 to 89 Days Past Due [Member] | Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	282
60 to 89 Days Past Due [Member] | Real Estate [Member] | Residential Real Estate First Lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	1,076	567
60 to 89 Days Past Due [Member] | Real Estate [Member] | Residential Real Estate All Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	37	30
60 to 89 Days Past Due [Member] | Real Estate [Member] | Farmland [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans		37
60 to 89 Days Past Due [Member] | Commercial and Agricultural Non-Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	2,176	546
60 to 89 Days Past Due [Member] | Consumer Non-real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	648	321
90 Days and Greater [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	11,535	14,200
90 Days and Greater [Member] | Real Estate [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	4,580	1,465
90 Days and Greater [Member] | Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	42
90 Days and Greater [Member] | Real Estate [Member] | Construction and Development Less than 60 Months [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	114
90 Days and Greater [Member] | Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	148
90 Days and Greater [Member] | Real Estate [Member] | Residential Real Estate First Lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	844	2,817
90 Days and Greater [Member] | Real Estate [Member] | Residential Real Estate All Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	185	451
90 Days and Greater [Member] | Real Estate [Member] | Farmland [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	325	2,077
90 Days and Greater [Member] | Commercial and Agricultural Non-Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	4,712	7,118
90 Days and Greater [Member] | Consumer Non-real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	585	272
Past Due Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	38,496	35,890
Past Due Loans [Member] | Real Estate [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	7,418	3,734
Past Due Loans [Member] | Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	6,279	7,244
Past Due Loans [Member] | Real Estate [Member] | Construction and Development Less than 60 Months [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	689	136
Past Due Loans [Member] | Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	1,751	2,264
Past Due Loans [Member] | Real Estate [Member] | Residential Real Estate First Lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	5,335	6,735
Past Due Loans [Member] | Real Estate [Member] | Residential Real Estate All Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	487	774
Past Due Loans [Member] | Real Estate [Member] | Farmland [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	1,671	2,367
Past Due Loans [Member] | Commercial and Agricultural Non-Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	10,388	10,170
Past Due Loans [Member] | Consumer Non-real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	3,824	2,466
Past Due Loans [Member] | Oil and Gas [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	654
Current Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	6,905,067	6,133,552
Current Loans [Member] | Real Estate [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	899,043	771,820
Current Loans [Member] | Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	1,379,028	1,088,080
Current Loans [Member] | Real Estate [Member] | Construction and Development Less than 60 Months [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	480,381	415,330
Current Loans [Member] | Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	302,681	252,260
Current Loans [Member] | Real Estate [Member] | Residential Real Estate First Lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	1,114,371	930,271
Current Loans [Member] | Real Estate [Member] | Residential Real Estate All Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	198,518	160,244
Current Loans [Member] | Real Estate [Member] | Farmland [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	259,847	269,812
Current Loans [Member] | Commercial and Agricultural Non-Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	1,365,987	1,405,923
Current Loans [Member] | Consumer Non-real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	443,215	410,904
Current Loans [Member] | Oil and Gas [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	$ 461,996	$ 428,908

Loans Held for Investment an_11

Loans Held for Investment and Allowance for Credit Losses on Loans - Gross Loans Held for Investment by Year of Origination and Internally Assigned Credit Grades (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	$ 2,264,479	$ 2,297,658
Fiscal year before current fiscal year	1,428,113	1,023,819
Two years before current fiscal year	752,483	747,672
Three years before current fiscal year	541,762	372,852
Four years before current fiscal year	242,342	233,568
Prior	589,317	583,158
Revolving Loans Amortized Cost Basis	1,125,067	910,715
Total Loans	6,943,563	6,169,442
Farmland [Member]
Financing Receivable Recorded Investment [Line Items]
Total Loans	261,518
Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Total Loans	6,943,563
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	206,690	189,699
Fiscal year before current fiscal year	181,587	164,908
Two years before current fiscal year	134,343	136,895
Three years before current fiscal year	112,408	68,266
Four years before current fiscal year	53,126	48,048
Prior	150,482	133,071
Revolving Loans Amortized Cost Basis	67,825	34,667
Total Loans	906,461	775,554
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member] | Grade 1 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	171,615	153,887
Fiscal year before current fiscal year	145,317	130,835
Two years before current fiscal year	106,803	113,830
Three years before current fiscal year	91,892	59,163
Four years before current fiscal year	44,086	37,647
Prior	119,755	102,438
Revolving Loans Amortized Cost Basis	53,026	25,128
Total Loans	732,494	622,928
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member] | Grade 2 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	34,800	35,475
Fiscal year before current fiscal year	34,283	33,198
Two years before current fiscal year	27,153	21,570
Three years before current fiscal year	18,072	8,397
Four years before current fiscal year	8,528	9,936
Prior	29,077	29,191
Revolving Loans Amortized Cost Basis	14,737	9,152
Total Loans	166,650	146,919
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member] | Grade 3 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	235
Fiscal year before current fiscal year	1,718	275
Two years before current fiscal year	387	605
Three years before current fiscal year	1,334	261
Four years before current fiscal year	332	465
Prior	1,161	1,071
Revolving Loans Amortized Cost Basis	62	62
Total Loans	5,229	2,739
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member] | Grade 4 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	40	337
Fiscal year before current fiscal year	269	600
Two years before current fiscal year		890
Three years before current fiscal year	1,110	445
Four years before current fiscal year	180
Prior	489	371
Revolving Loans Amortized Cost Basis		325
Total Loans	2,088	2,968
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	473,474	313,768
Fiscal year before current fiscal year	290,050	256,098
Two years before current fiscal year	199,599	168,595
Three years before current fiscal year	157,732	90,446
Four years before current fiscal year	48,737	57,005
Prior	138,615	155,820
Revolving Loans Amortized Cost Basis	77,100	53,592
Total Loans	1,385,307	1,095,324
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member] | Grade 1 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	350,425	252,718
Fiscal year before current fiscal year	239,477	204,892
Two years before current fiscal year	170,415	114,429
Three years before current fiscal year	108,095	51,440
Four years before current fiscal year	23,754	37,305
Prior	66,564	118,264
Revolving Loans Amortized Cost Basis	45,172	29,257
Total Loans	1,003,902	808,305
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member] | Grade 2 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	115,372	53,548
Fiscal year before current fiscal year	50,573	51,206
Two years before current fiscal year	29,031	50,912
Three years before current fiscal year	46,904	38,850
Four years before current fiscal year	24,877	19,466
Prior	70,686	36,808
Revolving Loans Amortized Cost Basis	31,928	24,335
Total Loans	369,371	275,125
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member] | Grade 3 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	7,677	7,095
Two years before current fiscal year	153	3,254
Three years before current fiscal year	2,733	121
Four years before current fiscal year	64	234
Prior	1,318	656
Total Loans	11,945	11,360
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member] | Grade 4 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year		407
Three years before current fiscal year		35
Four years before current fiscal year	42
Prior	47	92
Total Loans	89	534
Real Estate [Member] | Construction and Development Less than 60 Months [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	206,198	211,932
Fiscal year before current fiscal year	113,261	41,862
Two years before current fiscal year	41,874	70,946
Three years before current fiscal year	20,136	13,814
Four years before current fiscal year	5,115	2,774
Prior	5,866	4,691
Revolving Loans Amortized Cost Basis	88,620	69,447
Total Loans	481,070	415,466
Real Estate [Member] | Construction and Development Less than 60 Months [Member] | Grade 1 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	169,189	173,384
Fiscal year before current fiscal year	92,988	34,351
Two years before current fiscal year	40,187	57,729
Three years before current fiscal year	5,721	9,276
Four years before current fiscal year	3,467	1,953
Prior	5,071	4,181
Revolving Loans Amortized Cost Basis	40,474	32,294
Total Loans	357,097	313,168
Real Estate [Member] | Construction and Development Less than 60 Months [Member] | Grade 2 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	36,042	37,275
Fiscal year before current fiscal year	20,273	7,511
Two years before current fiscal year	1,513	13,161
Three years before current fiscal year	14,368	4,526
Four years before current fiscal year	1,648	803
Prior	774	510
Revolving Loans Amortized Cost Basis	47,988	37,153
Total Loans	122,606	100,939
Real Estate [Member] | Construction and Development Less than 60 Months [Member] | Grade 3 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	967	1,273
Two years before current fiscal year	141
Three years before current fiscal year		6
Prior	8
Revolving Loans Amortized Cost Basis	158
Total Loans	1,274	1,279
Real Estate [Member] | Construction and Development Less than 60 Months [Member] | Grade 4 [Member]
Financing Receivable Recorded Investment [Line Items]
Two years before current fiscal year	33	56
Three years before current fiscal year	47	6
Four years before current fiscal year		18
Prior	13
Total Loans	93	80
Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	251,420	221,959
Fiscal year before current fiscal year	13,986	10,350
Two years before current fiscal year	361	41
Three years before current fiscal year	18
Four years before current fiscal year		18
Prior	442	454
Revolving Loans Amortized Cost Basis	38,205	21,702
Total Loans	304,432	254,524
Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member] | Grade 1 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	210,099	193,311
Fiscal year before current fiscal year	12,824	7,786
Two years before current fiscal year	259	41
Three years before current fiscal year	18
Four years before current fiscal year		18
Prior	42	29
Revolving Loans Amortized Cost Basis	36,114	16,247
Total Loans	259,356	217,432
Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member] | Grade 2 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	39,689	28,170
Fiscal year before current fiscal year	1,152	2,564
Two years before current fiscal year	102
Prior	400	425
Revolving Loans Amortized Cost Basis	2,091	5,455
Total Loans	43,434	36,614
Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member] | Grade 3 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	1,212	478
Total Loans	1,212	478
Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member] | Grade 4 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	420
Fiscal year before current fiscal year	10
Total Loans	430
Real Estate [Member] | Residential Real Estate First Lien [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	352,634	302,129
Fiscal year before current fiscal year	244,368	202,546
Two years before current fiscal year	168,670	117,334
Three years before current fiscal year	101,339	80,738
Four years before current fiscal year	68,394	58,207
Prior	180,201	172,124
Revolving Loans Amortized Cost Basis	4,100	3,928
Total Loans	1,119,706	937,006
Real Estate [Member] | Residential Real Estate First Lien [Member] | Grade 1 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	304,206	256,834
Fiscal year before current fiscal year	205,277	174,718
Two years before current fiscal year	141,807	99,082
Three years before current fiscal year	85,850	64,949
Four years before current fiscal year	56,028	45,211
Prior	137,254	128,898
Revolving Loans Amortized Cost Basis	4,100	3,928
Total Loans	934,522	773,620
Real Estate [Member] | Residential Real Estate First Lien [Member] | Grade 2 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	46,433	44,080
Fiscal year before current fiscal year	36,877	26,073
Two years before current fiscal year	25,623	15,719
Three years before current fiscal year	13,414	12,612
Four years before current fiscal year	11,725	10,926
Prior	37,242	38,230
Total Loans	171,314	147,640
Real Estate [Member] | Residential Real Estate First Lien [Member] | Grade 3 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	1,940	1,151
Fiscal year before current fiscal year	1,903	1,266
Two years before current fiscal year	1,065	2,054
Three years before current fiscal year	1,689	1,930
Four years before current fiscal year	497	1,155
Prior	3,889	3,523
Total Loans	10,983	11,079
Real Estate [Member] | Residential Real Estate First Lien [Member] | Grade 4 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	55	64
Fiscal year before current fiscal year	311	489
Two years before current fiscal year	175	479
Three years before current fiscal year	386	1,247
Four years before current fiscal year	144	915
Prior	1,816	1,473
Total Loans	2,887	4,667
Real Estate [Member] | Residential Real Estate All Other [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	37,800	18,965
Fiscal year before current fiscal year	13,103	16,539
Two years before current fiscal year	12,539	10,722
Three years before current fiscal year	7,129	7,379
Four years before current fiscal year	5,084	5,710
Prior	14,611	14,981
Revolving Loans Amortized Cost Basis	108,739	86,722
Total Loans	199,005	161,018
Real Estate [Member] | Residential Real Estate All Other [Member] | Grade 1 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	31,762	16,376
Fiscal year before current fiscal year	11,012	13,320
Two years before current fiscal year	10,696	8,691
Three years before current fiscal year	5,458	5,609
Four years before current fiscal year	3,607	4,101
Prior	11,198	12,386
Revolving Loans Amortized Cost Basis	42,629	30,840
Total Loans	116,362	91,323
Real Estate [Member] | Residential Real Estate All Other [Member] | Grade 2 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	5,657	2,183
Fiscal year before current fiscal year	1,887	2,941
Two years before current fiscal year	1,744	1,919
Three years before current fiscal year	1,589	1,500
Four years before current fiscal year	1,237	895
Prior	2,574	2,202
Revolving Loans Amortized Cost Basis	64,231	55,000
Total Loans	78,919	66,640
Real Estate [Member] | Residential Real Estate All Other [Member] | Grade 3 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	381	250
Fiscal year before current fiscal year	186	98
Two years before current fiscal year	71	112
Three years before current fiscal year	50	232
Four years before current fiscal year	201	702
Prior	786	309
Revolving Loans Amortized Cost Basis	1,828	538
Total Loans	3,503	2,241
Real Estate [Member] | Residential Real Estate All Other [Member] | Grade 4 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year		156
Fiscal year before current fiscal year	18	180
Two years before current fiscal year	28
Three years before current fiscal year	32	38
Four years before current fiscal year	39	12
Prior	53	84
Revolving Loans Amortized Cost Basis	51	344
Total Loans	221	814
Real Estate [Member] | Farmland [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	66,207	68,244
Fiscal year before current fiscal year	48,213	52,318
Two years before current fiscal year	38,135	48,829
Three years before current fiscal year	27,611	21,863
Four years before current fiscal year	15,688	18,140
Prior	46,331	41,766
Revolving Loans Amortized Cost Basis	19,333	21,019
Total Loans	261,518	272,179
Real Estate [Member] | Farmland [Member] | Grade 1 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	47,211	47,485
Fiscal year before current fiscal year	33,771	39,216
Two years before current fiscal year	29,454	23,627
Three years before current fiscal year	18,693	15,180
Four years before current fiscal year	10,038	12,579
Prior	29,724	29,457
Revolving Loans Amortized Cost Basis	6,126	6,946
Total Loans	175,017	174,490
Real Estate [Member] | Farmland [Member] | Grade 2 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	16,140	16,063
Fiscal year before current fiscal year	14,294	8,702
Two years before current fiscal year	6,536	23,688
Three years before current fiscal year	8,855	5,488
Four years before current fiscal year	5,428	4,159
Prior	14,373	10,848
Revolving Loans Amortized Cost Basis	11,281	10,455
Total Loans	76,907	79,403
Real Estate [Member] | Farmland [Member] | Grade 3 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	2,196	3,587
Fiscal year before current fiscal year	111	4,021
Two years before current fiscal year	2,090	1,514
Three years before current fiscal year	63	74
Four years before current fiscal year	141	1,293
Prior	2,023	1,316
Revolving Loans Amortized Cost Basis	1,926	3,386
Total Loans	8,550	15,191
Real Estate [Member] | Farmland [Member] | Grade 4 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	660	1,109
Fiscal year before current fiscal year	37	379
Two years before current fiscal year	55
Three years before current fiscal year		1,121
Four years before current fiscal year	81	109
Prior	211	145
Revolving Loans Amortized Cost Basis		232
Total Loans	1,044	3,095
Commercial and Agricultural Non-Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	409,922	535,649
Fiscal year before current fiscal year	271,328	154,760
Two years before current fiscal year	95,450	123,160
Three years before current fiscal year	68,627	66,406
Four years before current fiscal year	33,752	36,768
Prior	48,582	56,279
Revolving Loans Amortized Cost Basis	448,714	443,071
Total Loans	1,376,375	1,416,093
Commercial and Agricultural Non-Real Estate [Member] | Grade 1 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	303,340	445,864
Fiscal year before current fiscal year	215,247	121,786
Two years before current fiscal year	72,246	95,379
Three years before current fiscal year	53,808	44,593
Four years before current fiscal year	15,410	32,169
Prior	42,842	43,750
Revolving Loans Amortized Cost Basis	316,942	307,361
Total Loans	1,019,835	1,090,902
Commercial and Agricultural Non-Real Estate [Member] | Grade 2 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	100,010	85,920
Fiscal year before current fiscal year	54,656	30,568
Two years before current fiscal year	20,423	25,097
Three years before current fiscal year	12,914	9,680
Four years before current fiscal year	16,187	2,735
Prior	3,832	10,821
Revolving Loans Amortized Cost Basis	126,503	105,700
Total Loans	334,525	270,521
Commercial and Agricultural Non-Real Estate [Member] | Grade 3 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	6,332	2,995
Fiscal year before current fiscal year	826	2,185
Two years before current fiscal year	1,682	1,347
Three years before current fiscal year	816	11,479
Four years before current fiscal year	1,745	1,291
Prior	797	599
Revolving Loans Amortized Cost Basis	5,070	27,716
Total Loans	17,268	47,612
Commercial and Agricultural Non-Real Estate [Member] | Grade 4 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	240	870
Fiscal year before current fiscal year	599	221
Two years before current fiscal year	1,099	1,337
Three years before current fiscal year	825	654
Four years before current fiscal year	410	573
Prior	1,111	1,109
Revolving Loans Amortized Cost Basis	199	2,294
Total Loans	4,483	7,058
Commercial and Agricultural Non-Real Estate [Member] | Grade 5 [Member]
Financing Receivable Recorded Investment [Line Items]
Three years before current fiscal year	264
Total Loans	264
Consumer Non-real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	225,469	222,450
Fiscal year before current fiscal year	115,973	88,564
Two years before current fiscal year	44,259	50,662
Three years before current fiscal year	23,040	20,026
Four years before current fiscal year	7,601	6,639
Prior	3,614	3,429
Revolving Loans Amortized Cost Basis	27,083	21,600
Total Loans	447,039	413,370
Consumer Non-real Estate [Member] | Grade 1 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	203,335	201,893
Fiscal year before current fiscal year	104,409	80,616
Two years before current fiscal year	39,822	43,793
Three years before current fiscal year	21,076	17,587
Four years before current fiscal year	6,589	5,723
Prior	2,187	2,048
Revolving Loans Amortized Cost Basis	26,263	20,600
Total Loans	403,681	372,260
Consumer Non-real Estate [Member] | Grade 2 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	21,078	19,349
Fiscal year before current fiscal year	10,542	7,551
Two years before current fiscal year	3,978	6,119
Three years before current fiscal year	1,541	2,167
Four years before current fiscal year	822	816
Prior	1,351	1,342
Revolving Loans Amortized Cost Basis	816	996
Total Loans	40,128	38,340
Consumer Non-real Estate [Member] | Grade 3 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	827	1,146
Fiscal year before current fiscal year	671	307
Two years before current fiscal year	405	551
Three years before current fiscal year	282	203
Four years before current fiscal year	134	86
Prior	63	31
Revolving Loans Amortized Cost Basis	4	4
Total Loans	2,386	2,328
Consumer Non-real Estate [Member] | Grade 4 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	229	62
Fiscal year before current fiscal year	351	90
Two years before current fiscal year	54	199
Three years before current fiscal year	141	69
Four years before current fiscal year	56	14
Prior	13	8
Total Loans	844	442
Oil and Gas [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	34,665	212,863
Fiscal year before current fiscal year	136,244	35,874
Two years before current fiscal year	17,253	20,488
Three years before current fiscal year	23,722	3,914
Four years before current fiscal year	4,845	259
Prior	573	543
Revolving Loans Amortized Cost Basis	245,348	154,967
Total Loans	462,650	428,908
Oil and Gas [Member] | Grade 1 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	24,938	188,072
Fiscal year before current fiscal year	125,209	26,090
Two years before current fiscal year	16,482	6,579
Three years before current fiscal year	682	1,257
Four years before current fiscal year	1,678	89
Prior	246	73
Revolving Loans Amortized Cost Basis	199,610	139,687
Total Loans	368,845	361,847
Oil and Gas [Member] | Grade 2 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	7,610	17,150
Fiscal year before current fiscal year	10,668	9,774
Two years before current fiscal year	766	13,909
Three years before current fiscal year	23,040	2,657
Four years before current fiscal year	3,167	170
Prior	327	215
Revolving Loans Amortized Cost Basis	45,240	13,186
Total Loans	90,818	57,061
Oil and Gas [Member] | Grade 3 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	2,117	6,641
Fiscal year before current fiscal year	47	10
Two years before current fiscal year	5
Prior		255
Revolving Loans Amortized Cost Basis	498	2,024
Total Loans	2,667	8,930
Oil and Gas [Member] | Grade 4 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year		1,000
Fiscal year before current fiscal year	320
Revolving Loans Amortized Cost Basis		70
Total Loans	$ 320	$ 1,070

Loans Held for Investment an_12

Loans Held for Investment and Allowance for Credit Losses on Loans - Activity in Allowance for Credit Losses on Loans (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	$ 83,936	$ 91,366
Initial allowance on loans purchased with credit deterioration	71	8,299
Charge- offs	(2,781)	(7,845)
Recoveries	1,426	806
Net charge-offs	(1,355)	(7,039)
Provision for credit losses on loans	10,076	(8,690)	$ 62,648
Balance at end of period	92,728	83,936	91,366
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	7,568	8,470
Initial allowance on loans purchased with credit deterioration		1,080
Charge- offs	(20)	(38)
Recoveries	507	74
Net charge-offs	487	36
Provision for credit losses on loans	(1,643)	(2,018)
Balance at end of period	6,412	7,568	8,470
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	16,987	12,318
Initial allowance on loans purchased with credit deterioration		824
Charge- offs		(803)
Recoveries		67
Net charge-offs		(736)
Provision for credit losses on loans	13,205	4,581
Balance at end of period	30,192	16,987	12,318
Real Estate [Member] | Construction and Development Less than 60 Months [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	3,490	2,723
Initial allowance on loans purchased with credit deterioration		173
Charge- offs	(93)
Recoveries	12	12
Net charge-offs	(81)	12
Provision for credit losses on loans	369	582
Balance at end of period	3,778	3,490	2,723
Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	1,092	726
Provision for credit losses on loans	2,184	366
Balance at end of period	3,276	1,092	726
Real Estate [Member] | Residential Real Estate First Lien [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	3,076	2,822
Initial allowance on loans purchased with credit deterioration	2	126
Charge- offs	(106)	(87)
Recoveries	87	55
Net charge-offs	(19)	(32)
Provision for credit losses on loans	1,039	160
Balance at end of period	4,098	3,076	2,822
Real Estate [Member] | Residential Real Estate All Other [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	2,104	2,236
Charge- offs	(38)	(521)
Recoveries	405	52
Net charge-offs	367	(469)
Provision for credit losses on loans	(626)	337
Balance at end of period	1,845	2,104	2,236
Commercial and Agricultural Non-Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	28,085	34,643
Initial allowance on loans purchased with credit deterioration	44	5,663
Charge- offs	(1,756)	(4,643)
Recoveries	222	219
Net charge-offs	(1,534)	(4,424)
Provision for credit losses on loans	716	(7,797)
Balance at end of period	27,311	28,085	34,643
Consumer Non-real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	3,734	3,542
Initial allowance on loans purchased with credit deterioration	25	38
Charge- offs	(768)	(864)
Recoveries	193	326
Net charge-offs	(575)	(538)
Provision for credit losses on loans	951	692
Balance at end of period	4,135	3,734	3,542
Oil and Gas [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	12,978	20,733
Provision for credit losses on loans	(4,807)	(7,755)
Balance at end of period	8,171	12,978	20,733
Farmland [Member] | Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	4,822	3,153
Initial allowance on loans purchased with credit deterioration		395
Charge- offs		(889)
Recoveries		1
Net charge-offs		(888)
Provision for credit losses on loans	(1,312)	2,162
Balance at end of period	$ 3,510	$ 4,822	$ 3,153

Loans Held for Investment an_13

Loans Held for Investment and Allowance for Credit Losses on Loans - Purchased Credit Deteriorated Loans (Detail) - Loans Acquired with Deteriorated Credit Quality [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable Allowance For Credit Losses [Line Items]
Purchase price of loans at acquisition	$ 668	$ 39,284
Allowance for credit losses at acquisition	71	8,299
Par value of acquired loans at acquisition	$ 739	$ 47,583

Loans Held for Investment an_14

Loans Held for Investment and Allowance for Credit Losses on Loans - Collateral-dependent Gross Loans Held for Investment by Collateral Type and Related Specific Allocation (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	$ 18,171	$ 24,857
Specific Allocation	92,728	83,936	$ 91,366
Real Estate Asset [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	7,833	13,129
Business Assets [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	6,625	6,472
Other Assets [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	3,713	5,256
Specific Allocation [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Specific Allocation	6,597	7,923
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	2,213	1,952
Specific Allocation	6,412	7,568	8,470
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	1,263	1,404
Specific Allocation	30,192	16,987	12,318
Real Estate [Member] | Construction and Development Less than 60 Months [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Specific Allocation	3,778	3,490	2,723
Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	420
Specific Allocation	3,276	1,092	726
Real Estate [Member] | Residential Real Estate First Lien [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	481	871
Specific Allocation	4,098	3,076	2,822
Real Estate [Member] | Residential Real Estate All Other [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	9	199
Specific Allocation	1,845	2,104	2,236
Real Estate [Member] | Farmland [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	3,447	8,703
Real Estate [Member] | Real Estate Asset [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	2,213	1,952
Real Estate [Member] | Real Estate Asset [Member] | Commercial Real Estate Non-Owner Occupied [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	1,263	1,404
Real Estate [Member] | Real Estate Asset [Member] | Construction Residential Real Estate Less than 60 Months [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	420
Real Estate [Member] | Real Estate Asset [Member] | Residential Real Estate First Lien [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	481	871
Real Estate [Member] | Real Estate Asset [Member] | Residential Real Estate All Other [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	9	199
Real Estate [Member] | Real Estate Asset [Member] | Farmland [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	3,447	8,703
Real Estate [Member] | Specific Allocation [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Specific Allocation	870	576
Real Estate [Member] | Specific Allocation [Member] | Commercial Real Estate Non-Owner Occupied [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Specific Allocation	333	263
Real Estate [Member] | Specific Allocation [Member] | Construction Residential Real Estate Less than 60 Months [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Specific Allocation	45
Real Estate [Member] | Specific Allocation [Member] | Residential Real Estate First Lien [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Specific Allocation	207	143
Real Estate [Member] | Specific Allocation [Member] | Residential Real Estate All Other [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Specific Allocation	9	178
Real Estate [Member] | Specific Allocation [Member] | Farmland [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Specific Allocation	831	1,805
Commercial and Agricultural Non-Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	10,221	11,674
Specific Allocation	27,311	28,085	34,643
Commercial and Agricultural Non-Real Estate [Member] | Business Assets [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	6,625	6,472
Commercial and Agricultural Non-Real Estate [Member] | Other Assets [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	3,596	5,202
Commercial and Agricultural Non-Real Estate [Member] | Specific Allocation [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Specific Allocation	4,221	4,938
Consumer Non-real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	117	54
Specific Allocation	4,135	3,734	$ 3,542
Consumer Non-real Estate [Member] | Other Assets [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	117	54
Consumer Non-real Estate [Member] | Specific Allocation [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Specific Allocation	$ 81	$ 20

Loans Held for Investment an_15

Loans Held for Investment and Allowance for Credit Losses on Loans - Transfers from Loans and Premises and Equipment to Other Real Estate Owned, Repossessed Assets and Other Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Noncash Investing and Financing Items [Abstract]
Other real estate owned	$ 2,563	$ 12,651	$ 32,093
Repossessed assets	1,040	844	1,418
Other assets	1,943		11,105
Total	$ 5,546	$ 13,495	$ 44,616

Loans Held for Investment an_16

Loans Held for Investment and Allowance for Credit Losses on Loans - Related Party Loans (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Receivables [Abstract]
Balance Beginning of the Period	$ 28,292	$ 22,057	$ 20,281
Additions	46,124	31,574	19,682
Collections/ Terminations	(51,249)	(25,339)	(17,906)
Balance End of the Period	$ 23,167	$ 28,292	$ 22,057

Premises and Equipment, Net a_3

Premises and Equipment, Net and Other Assets - Summary of Premises and Equipment by Classification (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Property Plant And Equipment [Line Items]
Accumulated depreciation	$ (144,381)	$ (133,672)
Premises and equipment, net	278,088	269,047
Land [Member]
Property Plant And Equipment [Line Items]
Premises and Equipment, gross	47,856	44,588
Buildings [Member]
Property Plant And Equipment [Line Items]
Premises and Equipment, gross	$ 266,660	256,738
Buildings [Member] | Minimum [Member]
Property Plant And Equipment [Line Items]
Estimated Useful Lives	10 years
Buildings [Member] | Maximum [Member]
Property Plant And Equipment [Line Items]
Estimated Useful Lives	40 years
Furniture Fixtures and Equipment [Member]
Property Plant And Equipment [Line Items]
Premises and Equipment, gross	$ 91,340	89,058
Furniture Fixtures and Equipment [Member] | Minimum [Member]
Property Plant And Equipment [Line Items]
Estimated Useful Lives	3 years
Furniture Fixtures and Equipment [Member] | Maximum [Member]
Property Plant And Equipment [Line Items]
Estimated Useful Lives	15 years
Construction in Progress [Member]
Property Plant And Equipment [Line Items]
Premises and Equipment, gross	$ 16,613	$ 12,335

Premises and Equipment, Net a_4

Premises and Equipment, Net and Other Assets - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Abstract]
Noncash construction in progress for retainage payable	$ 1,100,000	$ 1,000,000
Cash surrender value of life insurance policies	$ 82,700,000	81,400,000
Percentage of equity investment	50%
Low income housing tax credit investments	$ 24,700,000	20,100,000
Tax credits and other tax benefits recognized from LIHTC investments	6,400,000	6,500,000	$ 5,600,000
Equity securities	15,500,000	10,600,000
Other assets in equity interest	21,400,000	16,400,000
Amortization expense resulting from LIHTC investments	5,100,000	5,500,000	4,600,000
Unfunded commitment on investments	$ 22,300,000
Percentage of qualified investment	39%
Period of qualified investments taken	7 years
New market tax credit investments	$ 11,300,000	15,200,000
Tax credits and other tax benefits recognized from NMTC investments	4,700,000	4,000,000	4,000,000
Amortization expense resulting from NMTC investments	3,900,000	$ 3,300,000	$ 3,300,000
Unfunded commitment on NMTC investments	$ 0

Intangible Assets and Goodwil_2

Intangible Assets and Goodwill - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 36,648	$ 30,783
Accumulated Amortization	(16,665)	(13,217)
Net Carrying Amount	19,983	17,566
Core Deposit Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	33,298	27,433
Accumulated Amortization	(13,615)	(10,311)
Net Carrying Amount	19,683	17,122
Customer Relationship Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	3,350	3,350
Accumulated Amortization	(3,050)	(2,906)
Net Carrying Amount	$ 300	$ 444

Intangible Assets and Goodwil_3

Intangible Assets and Goodwill - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Weighted-average life	6 years 7 months 6 days
Goodwill	$ 182,055	$ 149,922
Customer Related Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted-average life	2 years 7 months 6 days
Core Deposit Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted-average life	6 years 8 months 12 days

Intangible Assets and Goodwil_4

Intangible Assets and Goodwill - Estimated Amortization of Intangible Assets (Detail) $ in Thousands	Dec. 31, 2022 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2023	$ 3,449
2024	3,449
2025	3,223
2026	2,620
2027	$ 2,616

Intangible Assets and Goodwil_5

Intangible Assets and Goodwill - Summary of Goodwill by Business Segment (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)
Goodwill [Line Items]
Balance at beginning of period	$ 149,922
Acquisitions	32,133
Balance at end of period	182,055
Metropolitan Banks [Member]
Goodwill [Line Items]
Balance at beginning of period	13,767
Balance at end of period	13,767
Community Banks [Member]
Goodwill [Line Items]
Balance at beginning of period	61,212
Balance at end of period	61,212
Pegasus [Member]
Goodwill [Line Items]
Balance at beginning of period	68,855
Balance at end of period	68,855
Worthington [Member]
Goodwill [Line Items]
Balance at beginning of period	0
Acquisitions	32,133
Balance at end of period	32,133
Other Financial Services [Member]
Goodwill [Line Items]
Balance at beginning of period	5,464
Balance at end of period	5,464
Executive, Operations & Support [Member]
Goodwill [Line Items]
Balance at beginning of period	624
Balance at end of period	$ 624

Time Deposits - Summary of Sche

Time Deposits - Summary of Scheduled Maturities of all Time Deposits (Detail) $ in Thousands	Dec. 31, 2022 USD ($)
Deposits [Abstract]
2023	$ 553,052
2024	84,859
2025	33,509
2026	21,591
2027	19,902
Thereafter	141
Total	$ 713,054

Time Deposits - Summary of time

Time Deposits - Summary of time Deposits Meet or Exceed Current Federal Deposit Insurance Corporation Insurance Limit for Periods Presented (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Deposits [Abstract]
Time deposits of $250,000 or more	$ 224,517	$ 150,393

Short-Term Borrowings - Summary

Short-Term Borrowings - Summary of Short-Term Borrowings (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Short-term Debt [Line Items]
Short-term borrowings	$ 300	$ 0
Weighted average interest rate	1.39%	0.08%
Federal Funds Purchased [Member]
Short-term Debt [Line Items]
Short-term borrowings	$ 300
Short-term Debt [Member]
Short-term Debt [Line Items]
End of period interest rate	4.30%	0.10%

Line of Credit - Additional Inf

Line of Credit - Additional Information (Detail)	Dec. 31, 2022 USD ($) Institution
Debt Instrument [Line Items]
Maximum drawing capacity	$ 741,800,000
FHLB stock holdings	655,500
Advances outstanding	$ 0
Number of financial institution | Institution	2
Pegasus [Member]
Debt Instrument [Line Items]
Advances outstanding	$ 0
Worthington [Member]
Debt Instrument [Line Items]
Maximum drawing capacity	5,500,000
Advances outstanding	0
Residential Mortgage [Member]
Debt Instrument [Line Items]
Line of credit assets pledged as collateral	938,800,000
Revolving Line of Credit Member] | BancFirst [Member]
Debt Instrument [Line Items]
Maximum drawing capacity	25,000,000
Revolving Line of Credit Member] | Pegasus [Member]
Debt Instrument [Line Items]
Maximum drawing capacity	20,000,000
Revolving Line of Credit Member] | Worthington [Member]
Debt Instrument [Line Items]
Maximum drawing capacity	$ 3,000,000

Subordinated Debt - Additional

Subordinated Debt - Additional Information (Detail) - USD ($)		1 Months Ended		12 Months Ended
	Jun. 17, 2021	Mar. 31, 2004	Feb. 29, 2004	Dec. 31, 2022
Subordinated Notes due 2036 [Member] | Private Placement [Member]
Subordinated Borrowing [Line Items]
Interest rate of securities	3.50%
Debt instrument maturity date				Jun. 30, 2036
Aggregate principal amount	$ 60,000,000
Net proceeds from sale of notes	59,150,000
Commissions and offering expenses	$ 850,000
Debt instrument, redemption, description				the Company may redeem all, but not less than all, of the Subordinated Notes at any time upon the occurrence of a “Tier 2 Capital Event,” a “Tax Event” or an “Investment Company Event” (each as defined in the Subordinated Notes). Any such redemption is subject to obtaining the prior approval of the Board of Governors of the Federal Reserve System (or its designee). The redemption price with respect to any such redemption will be equal to 100% of the principal amount of the Subordinated Note, or portion thereof, to be redeemed, plus accrued but unpaid interest, if any, thereon to, but excluding, the redemption date.
Debt instrument, redemption price, percentage of principal amount to be redeemed				100%
Subordinated Notes due 2036 [Member] | Private Placement [Member] | Bear Interest at Fixed Rate of 3.50% [Member]
Subordinated Borrowing [Line Items]
Frequency of payment				payable semi-annually in arrears on June 30 and December 31 of each year
Debt instrument, payment terms				The Subordinated Notes will initially bear interest at a fixed rate of 3.50% per annum, from and including June 17, 2021 to but excluding June 30, 2031, payable semi-annually in arrears on June 30 and December 31 of each year, commencing December 31, 2021. Then, from and including June 30, 2031, to but excluding the maturity date, the Subordinated Notes will bear interest at a floating rate equal to the benchmark (initially, three-month term SOFR), reset quarterly, plus a spread of 229 basis points, payable quarterly in arrears on March 31, June 30, September 30 and December 31 of each year. The Subordinated Notes mature on June 30, 2036.
Fixed rate				3.50%
Debt instrument, commencing date				Dec. 31, 2021
Subordinated Notes due 2036 [Member] | Private Placement [Member] | Three-Month Term SOFR [Member]
Subordinated Borrowing [Line Items]
Frequency of payment				payable quarterly in arrears on March 31, June 30, September 30 and December 31 of each year
Debt instrument, Basis point rate				2.29%
BancFirst Capital Trust Two [Member] | Subordinated Debentures Subject to Mandatory Redemption [Member]
Subordinated Borrowing [Line Items]
Interest rate of securities				7.20%
Junior subordinated notes assumed				$ 26,800,000
Frequency of payment				payable January 15, April 15, July 15 and October 15 of each year.
Debt instrument maturity date				Mar. 31, 2034
BancFirst Capital Trust Two [Member] | Cumulative Preferred Stock [Member]
Subordinated Borrowing [Line Items]
Issue of securities		$ 1,000,000	$ 25,000,000
Cumulative trust preferred securities interest rate				7.20%

Income Taxes - Components of th

Income Taxes - Components of the Company's Income Tax Expense (Benefit) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Current taxes:
Federal	$ 39,197	$ 28,359	$ 25,974
State	4,813	5,365	7,443
Deferred taxes	322	7,044	(9,491)
Total income taxes	$ 44,332	$ 40,768	$ 23,926

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2018
Income Taxes [Line Items]
Securities transactions income tax (benefit) expense	$ 453,000	$ 220,000	$ (82,000)
Federal tax rate, percentage	21%	21%	21%
Recognition of interest and penalties related to unrecognized tax benefits	$ 0	$ 0	$ 0
Amended Open tax	2023
Earliest Tax Year [Member]
Income Taxes [Line Items]
Year under examination	2019			2018
Latest Tax Year [Member]
Income Taxes [Line Items]
Year under examination	2021

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Tax Expense at the Federal Statutory Tax Rate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Tax expense at the federal statutory tax rate	$ 49,861	$ 43,764	$ 25,937
Increase (decrease) in tax expense from:
Tax-exempt income, net	(337)	(436)	(507)
Modified endowment life contracts	(487)	(501)	(508)
Share based compensation excess tax benefit	(2,905)	(1,643)	(412)
Tax deductible dividends paid on ESOP	(481)	(490)	(453)
State tax expense, net of federal tax benefit	3,788	4,779	5,606
Bargain purchase gain		(1,007)
Utilization of tax credits:
New markets tax credits, net of tax expense	(3,745)	(3,192)	(3,121)
Low-income housing tax credits, net of amortization	(1,024)	(1,533)	(1,273)
Other tax credits	(91)	(379)	(320)
Other, net	(247)	1,406	(1,023)
Total income taxes	$ 44,332	$ 40,768	$ 23,926

Income Taxes - Summary of Net D

Income Taxes - Summary of Net Deferred Tax Asset Reported in Other Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Unrealized net losses on securities	$ 22,107
Provision for credit losses	20,988	$ 17,654
Write-downs of other real estate owned	938	255
Deferred compensation	2,142	2,320
Stock-based compensation	1,643	1,575
Investments in partnership interests	6,056	3,840
Other	1,123	901
Gross deferred tax assets	54,997	26,545
Unrealized net gains on securities		(684)
Premium on securities of banks acquired	(98)	(120)
Intangibles	(6,346)	(5,756)
Basis difference related to tax credits	(4,118)	(2,979)
Depreciation	(20,360)	(14,545)
Prepaid expense deducted	(1,139)	(1,120)
Other	(185)	(169)
Gross deferred tax liabilities	(32,246)	(25,373)
Net deferred tax asset	$ 22,751	$ 1,172

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Cash settlement for stock options, number of shares	0	121,330
Net cash settlement for stock options, cost		$ 5.5
Deferred board fees percentage for stock units accumulation	100%
Nonqualified Incentive Stock Option Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period in years	7 years
Nonqualified Incentive Stock Option Plan [Member] | Stock Option [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares for future grants	35,000
Stock option plan termination date	Dec. 31, 2024
Option exercisable rate	25%
Option exercisable period	4 years
Options expire period	15 years
Vesting period in years, start	4 years
Options vest and exercisable Description	The options vest and are exercisable beginning four years from the date of grant at the rate of 25% per year for four years. Options expire no later than the end of fifteen years from the date of grant.
Nonqualified Incentive Stock Option Plan [Member] | Stock Option [Member] | Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock price percentage to fair value at grant date	100%
Non-Employee Directors Stock Option Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares for future grants	45,000
Stock option plan termination date	Dec. 31, 2024
Option exercisable rate	25%
Options expire period	15 years
Options vest and exercisable Description	The options vest and are exercisable beginning one year from the date of grant at the rate of 25% per year for four years
Number of options granted for non-employee director	10,000
Vesting period in years		4 years
Non-Employee Directors Stock Option Plan [Member] | Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock price percentage to fair value at grant date	100%
Banc First Deferred Stock Compensation Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock option plan termination date	Dec. 31, 2024
Number of shares available for future issuance under deferred compensation plan	26,288
Number of shares of common stock distributed	30,982	5,400

Stock-Based Compensation - Summ

Stock-Based Compensation - Summary of Activity Under Stock Option Plan (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Share-Based Payment Arrangement [Abstract]
Outstanding at beginning period - Options	1,303,250	1,343,080
Options granted	278,500	179,500
Options exercised	(241,460)	(214,330)
Options canceled, forfeited, or expired	(30,000)	(5,000)
Outstanding at ending period - Options	1,310,290	1,303,250
Exercisable at ending period - Options	489,540	614,875
Outstanding at beginning period - Wgtd. Avg. Exercise Price	$ 40.90	$ 35.28
Options granted - Wgtd. Avg. Exercise Price	87.13	62.13
Options exercised - Wgtd. Avg. Exercise Price	28.06	23.40
Options cancelled, forfeited, or expired - Wgtd. Avg. Exercise Price	66.31	44.23
Outstanding at ending period - Wgtd. Avg. Exercise Price	52.51	40.90
Exercisable at ending period - Wgtd. Avg. Exercise Price	$ 30.82	$ 28.03
Outstanding at ending period - Wgtd. Avg. Remaining Contractual Term, years	8 years 8 months 23 days	8 years 4 months 24 days
Exercisable at ending period - Wgtd. Avg. Remaining Contractual Term, years	6 years 9 months 18 days	7 years 1 month 24 days
Outstanding at ending period - Aggregate Intrinsic Value	$ 46,741	$ 38,656
Exercisable at ending period - Aggregate Intrinsic Value	$ 28,082	$ 26,153

Stock-Based Compensation - Opti

Stock-Based Compensation - Options Exercised Under Stock Option Plan (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Additional Disclosures [Abstract]
Total intrinsic value of options exercised	$ 14,837	$ 9,264	$ 2,315
Cash received from options exercised	6,776	5,015	1,574
Tax benefit realized from options exercised	$ 3,567	$ 2,360	$ 590

Stock-Based Compensation - Stoc

Stock-Based Compensation - Stock-Based Employee Compensation Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Statement Compensation Expense Items [Abstract]
Stock-based compensation expense	$ 1,941	$ 2,133	$ 1,516
Tax benefit	467	513	386
Stock-based compensation expense, net of tax	$ 1,474	$ 1,620	$ 1,130

Stock-Based Compensation - Unea

Stock-Based Compensation - Unearned Stock-based Compensation Expense (Detail) $ in Thousands	Dec. 31, 2022 USD ($)
Share-Based Payment Arrangement, Noncash Expense [Abstract]
Unearned stock-based compensation expense	$ 13,200

Stock-Based Compensation - Assu

Stock-Based Compensation - Assumptions Used for Computing Stock-Based Compensation Expense (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Weighted average grant-date fair value per share of options granted	$ 31.90	$ 21.16	$ 10.85
Risk-free interest rate, minimum	1.75%	1.30%	0.64%
Risk-free interest rate, maximum	4.17%	1.74%	1.13%
Dividend yield	2%	2%	2%
Stock price volatility, minimum	34.61%	35.55%	22.84%
Stock price volatility, maximum	35.60%	36.39%	36.10%
Expected term	10 years	10 years	10 years

Stock-Based Compensation - Su_2

Stock-Based Compensation - Summary of Accumulated Stock Units (Detail) - $ / shares	Dec. 31, 2022	Dec. 31, 2021
Share-Based Payment Arrangement [Abstract]
Accumulated stock units	129,609	152,754
Average price	$ 34.91	$ 30.86

Retirement Plans - Additional I

Retirement Plans - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2022 Plans
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Number of retirement plans	2
Maximum [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Maximum legal limit of employer contribution to plan	3%

Retirement Plans - Aggregate Am

Retirement Plans - Aggregate Amounts of Contributions to the 401(k) and ESOP Plans (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Contribution Plan Disclosure [Line Items]
Total contributions	$ 7,818	$ 7,173	$ 6,675
401(k) contributions [Member]
Defined Contribution Plan Disclosure [Line Items]
Aggregate amounts of contributions	3,011	2,856	2,986
ESOP contributions [Member]
Defined Contribution Plan Disclosure [Line Items]
Aggregate amounts of contributions	$ 4,807	$ 4,317	$ 3,689

Stockholders' Equity - Summary

Stockholders' Equity - Summary of Authorized Outstanding Preferred and Common Stock (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Class of Stock [Line Items]
Common stock, shares authorized	40,000,000	40,000,000
Common stock, shares outstanding	32,875,560	32,603,118	32,719,852
Common stock, par value	$ 1	$ 1
Common stock dividend payment terms	As declared
Common stock, voting rights	Voting
Senior Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares outstanding	0
Preferred stock, par value	$ 1	$ 1
Preferred stock, dividend payment terms	As declared
Preferred stock, voting rights	Voting
Cumulative Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, shares authorized	900,000	900,000
Preferred stock, shares outstanding	0
Preferred stock, par value	$ 5	$ 5
Preferred stock, dividend payment terms	As declared
Preferred stock, voting rights	Non-voting

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail) - USD ($)	1 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2022	Dec. 31, 2020	Jan. 01, 2023	Dec. 31, 2021	Jun. 17, 2021
Stockholders Equity [Line Items]
Additional shares to repurchase	650,000
Increase to retained earnings for cumulative effect of adopting ASU		$ 1,120,292,000			$ 977,067,000
Subordinated Notes due 2036 [Member] | Private Placement [Member]
Stockholders Equity [Line Items]
Aggregate principal amount						$ 60,000,000
Small Business Administration (SBA), CARES Act, Paycheck Protection Program Lending Facility [Member]
Stockholders Equity [Line Items]
Percentage of risk weight under risk based capital rules		0%
Cumulative Effect Period of Adoption Adjustment [Member]
Stockholders Equity [Line Items]
Increase to retained earnings for cumulative effect of adopting ASU			$ 2,300,000
Accounting Standards Update [Extensible List]			ASC 326 [Member]
Maximum [Member]
Stockholders Equity [Line Items]
Quantitative limit for trust preferred securities to be included in tier 1 capital		$ 15,000,000,000
Subsequent Event [Member]
Stockholders Equity [Line Items]
Available equity of BancFirst for dividend payments to the company				$ 185,100,000
Senior Preferred Stock [Member]
Stockholders Equity [Line Items]
Preferred stock, shares issued		0			0
Preferred stock, shares outstanding		0
Cumulative Preferred Stock [Member]
Stockholders Equity [Line Items]
Preferred stock, shares issued		0			0
Preferred stock, shares outstanding		0
Dividend payable at redemption, per share		$ 5
Cumulative preferred stock dividend rate		10%

Stockholders' Equity - Summar_2

Stockholders' Equity - Summary of Shares Repurchased Under Stock Purchase Program (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2022
Summary Of Shares Repurchased Under Stock Purchase Program [Abstract]
Number of shares repurchased	212,296	59,284
Average price of shares repurchased	$ 54.94	$ 52.26
Shares remaining to be repurchased	500,486	62,782	500,486

Stockholders' Equity - Required

Stockholders' Equity - Required Capital Amounts and Company's Respective Ratios (Detail) $ in Thousands	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Parent Company [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital Amount	$ 1,298,329	$ 1,171,215
Total Capital To Risk Weighted Assets Actual Ratio	0.1661	0.1730
Capital Required For Capital Adequacy Amount	$ 625,387	$ 541,493
Capital Required For Capital Adequacy to Risk Weighted Assets Ratio	0.0800	0.0800
Capital With Capital Conservation Buffer Amount	$ 820,821	$ 710,709
Capital With Capital Conservation To Risk Based Weighted Assets Buffer Ratio	0.1050	0.1050
Common Equity Tier 1 Risk Based Capital Amount	$ 1,120,361	$ 1,002,096
Common Equity Tier 1 Risk Based Capital To Risk Weighted Assets Ratio	0.1433	0.1480
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy Amount	$ 351,780	$ 304,590
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio	0.0450	0.0450
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer Amount	$ 547,214	$ 473,806
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio	0.0700	0.0700
Tier 1 Risk Based Capital Amount	$ 1,146,361	$ 1,028,096
Tier 1 Risk Based Capital To Risk Weighted Assets Ratio	0.1466	0.1519
Tier 1 Risk Based Capital Required For Capital Adequacy Amount	$ 469,041	$ 406,120
Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio	0.0600	0.0600
Tier 1 Risk Based Capital With Capital Conservation Buffer Amount	$ 664,474	$ 575,336
Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio	0.0850	0.0850
Tier 1 Capital Amount	$ 1,146,361	$ 1,028,096
Tier 1 Capital To Average Assets Ratio	0.0930	0.0914
Tier 1 Capital Required For Capital Adequacy Amount	$ 493,191	$ 449,847
Tier 1 Capital Required For Capital Adequacy To Average Assets Ratio	0.0400	0.0400
BancFirst [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital Amount	$ 1,092,098	$ 1,004,835
Total Capital To Risk Weighted Assets Actual Ratio	0.1668	0.1675
Capital Required For Capital Adequacy Amount	$ 523,932	$ 479,883
Capital Required For Capital Adequacy to Risk Weighted Assets Ratio	0.0800	0.0800
Capital With Capital Conservation Buffer Amount	$ 687,661	$ 629,847
Capital With Capital Conservation To Risk Based Weighted Assets Buffer Ratio	0.1050	0.1050
Capital Required To Be Well Capitalized Amount	$ 654,916	$ 599,854
Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio	0.1000	0.1000
Common Equity Tier 1 Risk Based Capital Amount	$ 991,050	$ 909,817
Common Equity Tier 1 Risk Based Capital To Risk Weighted Assets Ratio	0.1513	0.1517
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy Amount	$ 294,712	$ 269,934
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio	0.0450	0.0450
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer Amount	$ 458,441	$ 419,898
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio	0.0700	0.0700
Common Equity Tier 1 Risk Based Capital Required To Be Well Capitalized Amount	$ 425,695	$ 389,905
Common Equity Tier 1 Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio	0.0650	0.0650
Tier 1 Risk Based Capital Amount	$ 1,011,050	$ 929,817
Tier 1 Risk Based Capital To Risk Weighted Assets Ratio	0.1544	0.1550
Tier 1 Risk Based Capital Required For Capital Adequacy Amount	$ 392,949	$ 359,913
Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio	0.0600	0.0600
Tier 1 Risk Based Capital With Capital Conservation Buffer Amount	$ 556,678	$ 509,876
Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio	0.0850	0.0850
Tier 1 Risk Based Capital Required To Be Well Capitalized Amount	$ 523,932	$ 479,883
Tier 1 Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio	0.0800	0.0800
Tier 1 Capital Amount	$ 1,011,050	$ 929,817
Tier 1 Capital To Average Assets Ratio	0.0972	0.0922
Tier 1 Capital Required For Capital Adequacy Amount	$ 416,004	$ 403,460
Tier 1 Capital Required For Capital Adequacy To Average Assets Ratio	0.0400	0.0400
Tier 1 Capital Required To Be Well Capitalized Amount	$ 520,005	$ 504,325
Tier 1 Capital Required To Be Well Capitalized To Average Assets Ratio	0.0500	0.0500
Pegasus [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital Amount	$ 117,445	$ 88,224
Total Capital To Risk Weighted Assets Actual Ratio	0.1291	0.1162
Capital Required For Capital Adequacy Amount	$ 77,802	$ 60,765
Capital Required For Capital Adequacy to Risk Weighted Assets Ratio	0.0800	0.0800
Capital With Capital Conservation Buffer Amount	$ 95,553	$ 79,754
Capital With Capital Conservation To Risk Based Weighted Assets Buffer Ratio	0.1050	0.1050
Capital Required To Be Well Capitalized Amount	$ 91,003	$ 75,956
Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio	0.1000	0.1000
Common Equity Tier 1 Risk Based Capital Amount	$ 108,437	$ 82,056
Common Equity Tier 1 Risk Based Capital To Risk Weighted Assets Ratio	0.1192	0.1080
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy Amount	$ 40,951	$ 34,180
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio	0.0450	0.0450
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer Amount	$ 63,702	$ 53,170
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio	0.0700	0.0700
Common Equity Tier 1 Risk Based Capital Required To Be Well Capitalized Amount	$ 59,152	$ 49,372
Common Equity Tier 1 Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio	0.0650	0.0650
Tier 1 Risk Based Capital Amount	$ 108,437	$ 82,056
Tier 1 Risk Based Capital To Risk Weighted Assets Ratio	0.1192	0.1080
Tier 1 Risk Based Capital Required For Capital Adequacy Amount	$ 54,602	$ 45,574
Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio	0.0600	0.0600
Tier 1 Risk Based Capital With Capital Conservation Buffer Amount	$ 77,352	$ 64,563
Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio	0.0850	0.0850
Tier 1 Risk Based Capital Required To Be Well Capitalized Amount	$ 72,802	$ 60,765
Tier 1 Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio	0.0800	0.0800
Tier 1 Capital Amount	$ 108,437	$ 82,056
Tier 1 Capital To Average Assets Ratio	0.0800	0.0698
Tier 1 Capital Required For Capital Adequacy Amount	$ 54,238	$ 47,054
Tier 1 Capital Required For Capital Adequacy To Average Assets Ratio	0.0400	0.0400
Tier 1 Capital Required To Be Well Capitalized Amount	$ 67,798	$ 58,817
Tier 1 Capital Required To Be Well Capitalized To Average Assets Ratio	0.0500	0.0500
Worthington [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital Amount	$ 47,554
Total Capital To Risk Weighted Assets Actual Ratio	0.1409
Capital Required For Capital Adequacy Amount	$ 27,006
Capital Required For Capital Adequacy to Risk Weighted Assets Ratio	0.0800
Capital With Capital Conservation Buffer Amount	$ 35,446
Capital With Capital Conservation To Risk Based Weighted Assets Buffer Ratio	0.1050
Capital Required To Be Well Capitalized Amount	$ 33,758
Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio	0.1000
Common Equity Tier 1 Risk Based Capital Amount	$ 44,207
Common Equity Tier 1 Risk Based Capital To Risk Weighted Assets Ratio	0.1310
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy Amount	$ 15,191
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio	0.0450
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer Amount	$ 23,631
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio	0.0700
Common Equity Tier 1 Risk Based Capital Required To Be Well Capitalized Amount	$ 21,943
Common Equity Tier 1 Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio	0.0650
Tier 1 Risk Based Capital Amount	$ 44,207
Tier 1 Risk Based Capital To Risk Weighted Assets Ratio	0.1310
Tier 1 Risk Based Capital Required For Capital Adequacy Amount	$ 20,255
Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio	0.0600
Tier 1 Risk Based Capital With Capital Conservation Buffer Amount	$ 28,694
Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio	0.0850
Tier 1 Risk Based Capital Required To Be Well Capitalized Amount	$ 27,006
Tier 1 Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio	0.0800
Tier 1 Capital Amount	$ 44,207
Tier 1 Capital To Average Assets Ratio	0.0853
Tier 1 Capital Required For Capital Adequacy Amount	$ 20,738
Tier 1 Capital Required For Capital Adequacy To Average Assets Ratio	0.0400
Tier 1 Capital Required To Be Well Capitalized Amount	$ 25,922
Tier 1 Capital Required To Be Well Capitalized To Average Assets Ratio	0.0500

Net Income Per Common Share - B

Net Income Per Common Share - Basic and Diluted Net Income Per Common Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Earnings Per Share Reconciliation [Abstract]
Income available to common stockholders	$ 193,100	$ 167,630	$ 99,586
Income available to common stockholders plus assumed exercises of stock options	$ 193,100	$ 167,630	$ 99,586
Income available to common stockholders - Shares	32,778,355	32,716,099	32,672,522
Dilutive effect of stock options - Shares	661,141	598,047	538,430
Income available to common stockholders plus assumed exercises of stock options - Shares	33,439,496	33,314,146	33,210,952
Income available to common stockholders - Per Share Amount	$ 5.89	$ 5.12	$ 3.05
Income available to common stockholders plus assumed exercises of stock options - Per Share Amount	$ 5.77	$ 5.03	$ 3

Net Income Per Common Share - A

Net Income Per Common Share - Average Exercise Prices of Options Excluded from Computation of Diluted Net Income Per Common Share (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Abstract]
Shares	155,316	189,780	402,575
Average Exercise Price	$ 83.79	$ 60.33	$ 52.72

Condensed Parent Company Fina_3

Condensed Parent Company Financial Statements - Summary of Balance Sheet of Parent Company (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
ASSETS
Cash	$ 259,049	$ 228,819
Goodwill	182,055	149,922
Total assets	12,387,863	9,405,612	$ 9,212,357
LIABILITIES AND STOCKHOLDERS' EQUITY
Other liabilities	76,455	55,977
Subordinated debt	86,044	85,987
Stockholders’ equity	1,250,836	1,171,734	$ 1,067,885
Total liabilities and stockholders' equity	12,387,863	9,405,612
Parent Company [Member]
ASSETS
Cash	17,806	62,007
Investments in subsidiaries	1,206,246	1,117,622
Goodwill	101,611	69,478
Core deposit premium	12,009	7,627
Dividends receivable	15,682	13,426
Other assets	1,731	1,515
Total assets	1,355,085	1,271,675
LIABILITIES AND STOCKHOLDERS' EQUITY
Other liabilities	18,205	13,954
Subordinated debt	86,044	85,987
Stockholders’ equity	1,250,836	1,171,734
Total liabilities and stockholders' equity	$ 1,355,085	$ 1,271,675

Condensed Parent Company Fina_4

Condensed Parent Company Financial Statements- Summary of Income Statement of Parent Company (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
OPERATING INCOME
Interest on interest-bearing deposits	$ 58,848	$ 4,366	$ 6,049
OPERATING EXPENSE
Other	53,258	54,051	43,859
Allocated income tax benefit	(44,332)	(40,768)	(23,926)
Amortization of stock-based compensation arrangements of subsidiaries	(1,941)	(2,133)	(1,516)
Net income	193,100	167,630	99,586
Parent Company [Member]
OPERATING INCOME
Dividends from subsidiaries	93,139	54,480	50,872
Interest on interest-bearing deposits	94	41	1
Other	1,338	1,071	886
Total operating income	94,571	55,592	51,759
OPERATING EXPENSE
Interest	4,122	3,130	1,965
Other	7,190	3,340	3,317
Total operating expense	11,312	6,470	5,282
Income before taxes	83,259	49,122	46,477
Allocated income tax benefit	5,857	4,191	2,610
Income before equity in undistributed earnings of subsidiaries	89,116	53,313	49,087
Equity in undistributed earnings of subsidiaries	105,817	116,365	51,955
Amortization of stock-based compensation arrangements of subsidiaries	(1,833)	(2,048)	(1,456)
Net income	$ 193,100	$ 167,630	$ 99,586

Condensed Parent Company Fina_5

Condensed Parent Company Financial Statements - Summary of Cash Flow of Parent Company (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 193,100	$ 167,630	$ 99,586
Adjustments to reconcile to net cash provided by operating activities:
Amortization of stock-based compensation arrangements of subsidiaries	1,941	2,133	1,516
Other, net	(2,482)	6,783	7,818
Net cash provided by operating activities	226,272	203,934	154,854
INVESTING ACTIVITIES
Other, net	14,494	9,305	7,820
Net cash (used in) provided by investing activities	(1,519,168)	422,885	(898,506)
FINANCING ACTIVITIES
Common stock acquired		(11,663)	(3,098)
Net cash settlement of options		(5,479)
Cash dividends paid	(48,462)	(45,140)	(42,472)
Proceeds from issuance of subordinated notes, net of debt issuance costs		59,150
Net cash provided by (used in) financing activities	2,411,784	(193,709)	492,283
Net increase/(decrease) in cash, due from banks and interest-bearing deposits	1,118,888	433,110	(251,369)
Cash, due from banks and interest-bearing deposits at the beginning of the period	2,050,022	1,616,912	1,868,281
Cash, due from banks and interest-bearing deposits at the end of the period	3,168,910	2,050,022	1,616,912
SUPPLEMENTAL DISCLOSURE
Cash paid during the period for interest	42,930	11,993	22,056
Cash received during the period for income taxes, net	34,640	30,600	26,525
Parent Company [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	193,100	167,630	99,586
Adjustments to reconcile to net cash provided by operating activities:
Equity in undistributed earnings of subsidiaries	(105,817)	(116,365)	(51,955)
Amortization of stock-based compensation arrangements of subsidiaries	1,833	2,048	1,456
Other, net	3,815	5,056	188
Net cash provided by operating activities	92,931	58,369	49,275
INVESTING ACTIVITIES
Payments for investments in subsidiaries	(94,967)	(9,000)	(1,000)
Other, net	(1,352)	4,429	(1,175)
Net cash (used in) provided by investing activities	(96,319)	(4,571)	(2,175)
FINANCING ACTIVITIES
Issuance of common stock	7,649	2,260	1,790
Common stock acquired		(11,663)	(3,098)
Net cash settlement of options		(5,479)
Cash dividends paid	(48,462)	(45,140)	(42,472)
Proceeds from issuance of subordinated notes, net of debt issuance costs		59,150
Net cash provided by (used in) financing activities	(40,813)	(872)	(43,780)
Net increase/(decrease) in cash, due from banks and interest-bearing deposits	(44,201)	52,926	3,320
Cash, due from banks and interest-bearing deposits at the beginning of the period	62,007	9,081	5,761
Cash, due from banks and interest-bearing deposits at the end of the period	17,806	62,007	9,081
SUPPLEMENTAL DISCLOSURE
Cash paid during the period for interest	4,122	3,130	1,966
Cash received during the period for income taxes, net	$ 6,667	$ 4,411	$ 2,812

Commitments and Contingent Li_3

Commitments and Contingent Liabilities - Summary of Financial Instruments with Off-Balance-Sheet Risks (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Loan commitments	$ 2,627,552	$ 2,084,706
Stand-by letters of credit	$ 72,237	$ 82,841

Leases - Schedule of Rent Expen

Leases - Schedule of Rent Expense of Operating Leases (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Rent expense on all property and equipment rented	$ 1,865	$ 1,560	$ 1,894

Leases - Additional Information

Leases - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Right of use lease asset	$ 5,600	$ 5,000
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Accrued interest receivable and other assets	Accrued interest receivable and other assets
Operating lease liability	$ 5,425	$ 4,900
Operating Lease, Liability, Statement of Financial Position [Extensible List]	Accrued interest payable and other liabilities	Accrued interest payable and other liabilities
Operating lease weighted-average remaining lease term	3 years 7 months 6 days
Operating lease weighted-average discount rate	2.30%
Operating lease revenue	$ 5,400	$ 4,900	$ 5,300
Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration]	Occupancy, Net	Occupancy, Net	Occupancy, Net

Leases - Schedule of Minimum Fu

Leases - Schedule of Minimum Future Commitments of Operating Leases (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Leases [Abstract]
2023	$ 1,716
2024	1,358
2025	1,097
2026	696
2027	341
Thereafter	1,011
Total lease payments	6,219
Less imputed interest	(794)
Operating lease liability	$ 5,425	$ 4,900

Leases - Scheduled of Minimum F

Leases - Scheduled of Minimum Future Contractual Rent To be Received Under The Remaining Non-Cancelable Term of Operating Leases (Detail) $ in Thousands	Dec. 31, 2022 USD ($)
Leases [Abstract]
2023	$ 3,137
2024	2,874
2025	2,154
2026	1,778
2027	1,350
2028-2031	2,197
Total future minimum lease payments	$ 13,490

Fair Value Measurements - Fair

Fair Value Measurements - Fair Value of Financial Assets and Liabilities Measured on Recurring Basis (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	$ 1,538,221	$ 531,523
Derivative assets	$ 20,745	$ 8,946
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Interest Receivable and Other Assets	Interest Receivable and Other Assets
Derivative liabilities	$ 19,683	$ 8,237
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other Liabilities	Other Liabilities
U.S. Treasury [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	$ 1,477,864	$ 457,628
U.S. Federal Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	15,222	21,942
Mortgage Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	16,586	29,283
States and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	8,134	6,319
Asset backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	13,010	13,357
Other Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	7,405	2,994
Level 1 Inputs [Member] | U.S. Treasury [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	1,477,864	457,628
Level 2 Inputs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	20,745	8,946
Derivative liabilities	19,683	8,237
Level 2 Inputs [Member] | U.S. Federal Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	15,222	21,942
Level 2 Inputs [Member] | Mortgage Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	16,586	29,283
Level 2 Inputs [Member] | States and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	7,680	5,999
Level 2 Inputs [Member] | Asset backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	13,010	13,357
Level 2 Inputs [Member] | Other Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	7,405	2,994
Level 3 Inputs [Member] | States and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	$ 454	$ 320

Fair Value Measurements - Chang

Fair Value Measurements - Changes in Level 3 Assets Measured at Estimated Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at the beginning of the year	$ 320	$ 12,869
Transfers (to)/from level 2		(12,714)
Purchases	255	240
Settlements	(110)	(75)
Total unrealized losses	$ (11)
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Asset, Gain (Loss), Statement of Other Comprehensive Income or Comprehensive Income [Extensible Enumeration]	OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax
Balance at the end of the period	$ 454	$ 320

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Days from origination after which mortgage loans are sold	30 days
Amount of non-financial assets (liabilities) measured at fair value on a recurring basis	$ 0	$ 0
Non-financial assets or liabilities for which no impairment was provided	$ 0	$ 0

Fair Value Measurements - Asset

Fair Value Measurements - Assets Measured at Fair Value on Nonrecurring Basis (Detail) - Level 3 [Member] - Nonrecurring [Member] - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Equity Securities [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total Fair Value	$ 15,512	$ 10,590
Collateral Dependent Loans
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total Fair Value	1,618	13,195
Repossessed Assets [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total Fair Value	180	78
Other Real Estate Owned [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total Fair Value	$ 34,999	$ 7,496

Fair Value Measurements - Estim

Fair Value Measurements - Estimated Fair Values of Company's Financial Instruments (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
FINANCIAL ASSETS
Federal funds sold, Carrying Amount	$ 2,850	$ 800
Debt securities held for investment, Carrying Amount	2,383	2,977
Loans held for investment, net of allowance for credit losses Carrying Amount	6,850,835	6,085,506
Debt securities held for investment, Fair Value	2,383	2,978
Loans held for sale, Fair Value	6,232	24,776
FINANCIAL LIABILITIES
Deposits, Carrying Amount	10,974,228	8,091,914
Short-term borrowings, Carrying Amount	300	0
Subordinated debt, Carrying Amount	86,044	85,987
OFF-BALANCE SHEET FINANCIAL INSTRUMENTS
Loan commitments, Fair Value	4,598	3,648
Letters of credit, Fair Value	542	621
Level 2 Inputs [Member]
FINANCIAL ASSETS
Cash and cash equivalents, Carrying Amount	3,168,910	2,050,022
Federal funds sold, Carrying Amount	2,850	800
Debt securities held for investment, Carrying Amount	13	32
Loans held for sale, Carrying Amount	6,232	24,776
Cash and cash equivalents, Fair Value	3,168,910	2,050,022
Federal funds sold, Fair Value	2,850	800
Debt securities held for investment, Fair Value	13	33
Loans held for sale, Fair Value	6,232	24,776
FINANCIAL LIABILITIES
Deposits, Carrying Amount	10,974,228	8,091,914
Short-term borrowings, Carrying Amount	300
Subordinated debt, Carrying Amount	86,044	85,987
Deposits, Fair Value	10,614,840	8,161,553
Short-term borrowings, Fair Value	300
Subordinated debt, Fair Value	82,385	90,391
Level 3 Inputs [Member]
FINANCIAL ASSETS
Debt securities held for investment, Carrying Amount	2,370	2,945
Loans held for investment, net of allowance for credit losses Carrying Amount	6,850,835	6,085,506
Debt securities held for investment, Fair Value	2,370	2,945
Loans held for investment, net of allowance for credit losses, Fair Value	$ 6,563,755	$ 6,059,716

Derivative Financial Instrume_3

Derivative Financial Instruments - Summary of Notional Amounts and Estimated Fair Values of Oil and Gas Derivative Positions Outstanding (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Derivatives, Fair Value [Line Items]
Derivative assets, Estimated Fair Value	$ 20,745	$ 8,946
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Interest Receivable and Other Assets	Interest Receivable and Other Assets
Derivative liabilities, Estimated Fair Value	$ (19,683)	$ (8,237)
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other Liabilities	Other Liabilities
Not Designated as Hedging Instrument [Member] | Oil and Natural Gas Swaps and Options [Member]
Derivatives, Fair Value [Line Items]
Derivative assets, Estimated Fair Value	$ 20,745	$ 8,946
Derivative liabilities, Estimated Fair Value	(19,683)	(8,237)
Not Designated as Hedging Instrument [Member] | Oil and Natural Gas Swaps and Options [Member] | Oil [Member]
Derivatives, Fair Value [Line Items]
Derivative assets, Notional Amount	2,698	2,585
Derivative liabilities, Notional Amount	(2,698)	(2,585)
Derivative assets, Estimated Fair Value	8,868	6,563
Derivative liabilities, Estimated Fair Value	(8,259)	(6,129)
Not Designated as Hedging Instrument [Member] | Oil and Natural Gas Swaps and Options [Member] | Natural Gas [Member]
Derivatives, Fair Value [Line Items]
Derivative assets, Notional Amount	25,059	19,752
Derivative liabilities, Notional Amount	(25,059)	(19,752)
Derivative assets, Estimated Fair Value	11,877	2,383
Derivative liabilities, Estimated Fair Value	$ (11,424)	$ (2,108)

Derivative Financial Instrume_4

Derivative Financial Instruments - Summary of Company's Recognized Income Related to Activity Included in Other Noninterest Income (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Noninterest Income, Other	Noninterest Income, Other	Noninterest Income, Other
Oil and Natural Gas Swaps and Options [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative income	$ 416	$ 266	$ 50

Derivative Financial Instrume_5

Derivative Financial Instruments - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Derivative [Line Items]
Percentage share of total profit	35%
Other Assets [Member] | Oil and Gas Reserves [Member]
Derivative [Line Items]
Derivative instrument margin amount	$ 6.6	$ 14.3

Derivative Financial Instrume_6

Derivative Financial Instruments - Summary of Company's Net Credit Exposure Relating to Oil and Gas Swaps and Options with Bank Counterparties (Detail) $ in Thousands	Dec. 31, 2022 USD ($)
Oil and Natural Gas Swaps and Options [Member]
Credit Derivatives [Line Items]
Credit exposure	$ 6,560

Segment Information - Additiona

Segment Information - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2022 Business_Unit
Segment Reporting [Abstract]
Number of principal business units	6

Segment Information - Results o

Segment Information - Results of Operations and Selected Financial Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Net interest income	$ 373,673	$ 315,657	$ 306,668
Provision for/(benefit from) credit losses	10,076	(8,690)	62,648
Noninterest income	183,747	170,032	137,222
Depreciation and amortization	22,048	20,041	18,424
Other expenses	287,864	265,940	239,306
Income before taxes	237,432	208,398	123,512
Total assets	12,387,863	9,405,612	9,212,357
Capital expenditures	19,785	27,251	66,446
Operating Segments [Member] | BancFirst Metropolitan Banks [Member]
Segment Reporting Information [Line Items]
Net interest income	97,728	77,840	85,464
Provision for/(benefit from) credit losses	2,186	(5,474)	30,202
Noninterest income	32,756	23,257	18,664
Depreciation and amortization	2,821	2,593	2,639
Other expenses	42,583	39,356	36,746
Income before taxes	82,894	64,622	34,541
Total assets	3,412,369	2,627,874	2,729,886
Capital expenditures	2,026	1,612	1,087
Operating Segments [Member] | BancFirst Community Banks [Member]
Segment Reporting Information [Line Items]
Net interest income	208,728	180,925	175,757
Provision for/(benefit from) credit losses	2,451	(4,694)	29,827
Noninterest income	72,385	65,600	60,386
Depreciation and amortization	10,453	10,483	10,603
Other expenses	117,248	110,574	111,341
Income before taxes	150,961	130,162	84,372
Total assets	6,886,066	5,821,220	5,527,611
Capital expenditures	10,146	7,390	9,946
Operating Segments [Member] | Pegasus [Member]
Segment Reporting Information [Line Items]
Net interest income	46,439	24,222	21,360
Provision for/(benefit from) credit losses	2,840	1,395	1,916
Noninterest income	1,026	1,448	1,071
Depreciation and amortization	789	782	760
Other expenses	19,013	15,317	13,831
Income before taxes	24,823	8,176	5,924
Total assets	1,404,033	1,045,699	919,572
Capital expenditures	311	363	1,775
Operating Segments [Member] | Worthington [Member]
Segment Reporting Information [Line Items]
Net interest income	14,919
Provision for/(benefit from) credit losses	(43)
Noninterest income	1,034
Depreciation and amortization	398
Other expenses	9,280
Income before taxes	6,318
Total assets	541,002
Capital expenditures	262
Operating Segments [Member] | Other Financial Services [Member]
Segment Reporting Information [Line Items]
Net interest income	8,065	35,244	23,500
Provision for/(benefit from) credit losses	(161)	109	562
Noninterest income	50,643	47,124	41,549
Depreciation and amortization	519	557	500
Other expenses	36,271	60,435	44,918
Income before taxes	22,079	21,267	19,069
Total assets	171,679	71,694	137,122
Capital expenditures	67	400	450
Operating Segments [Member] | Executive, Operations & Support [Member]
Segment Reporting Information [Line Items]
Net interest income	(2,226)	(3,295)	79
Provision for/(benefit from) credit losses	2,803	(26)	141
Noninterest income	223,844	203,005	118,491
Depreciation and amortization	7,068	5,626	3,922
Other expenses	64,325	41,199	33,588
Income before taxes	147,422	152,911	80,919
Total assets	1,473,443	1,201,974	1,073,507
Capital expenditures	6,973	17,486	53,188
Eliminations [Member]
Segment Reporting Information [Line Items]
Net interest income	20	721	508
Noninterest income	(197,941)	(170,402)	(102,939)
Other expenses	(856)	(941)	(1,118)
Income before taxes	(197,065)	(168,740)	(101,313)
Total assets	$ (1,500,729)	$ (1,362,849)	$ (1,175,341)

Subsequent Event - Additional I

Subsequent Event - Additional Information (Detail) - USD ($) $ in Thousands	Feb. 08, 2022	Dec. 31, 2022	Aug. 25, 2022	Mar. 31, 2022	Jan. 10, 2022	Dec. 31, 2021	Dec. 31, 2020
Subsequent Event [Line Items]
Debt securities. average yield percentage				0.16%
Total assets		$ 12,387,863				$ 9,405,612	$ 9,212,357
Total loans		6,943,563				6,169,442
Deposits		$ 10,974,228				$ 8,091,914
Worthington National Bank [Member]
Subsequent Event [Line Items]
Purchase price	$ 77,700
Total assets	478,000
Total loans	257,000
Deposits	$ 430,000
United States Treasury Notes [Member]
Subsequent Event [Line Items]
Debt securities. average yield percentage			3.27%		1.42%
Debt securities purchased at par value			$ 300,000		$ 600,000
Debt securities, average maturity term			58 months		53 months