BancFirst (BANF) 10-Q 5 Aug 22 2022 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2022	Jul. 31, 2022
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2022
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q2
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
Entity Shell Company	false
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
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	73102-8405
City Area Code	405
Local Phone Number	270-1086
Document Quarterly Report	true
Document Transition Report	false
Entity Common Stock, Shares Outstanding		32,787,596

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
ASSETS
Cash and due from banks	$ 289,030	$ 228,819
Interest-bearing deposits with banks	3,590,311	1,821,203
Federal funds sold	1,525	800
Debt securities held for investment (fair value: $2,392 and $2,978, respectively)	2,391	2,977
Debt securities available for sale at fair value	1,203,503	531,523
Loans held for sale	7,360	24,776
Loans held for investment (net of unearned interest)	6,613,283	6,169,442
Allowance for credit losses	(86,935)	(83,936)
Loans, net of allowance for credit losses	6,526,348	6,085,506
Premises and equipment, net	279,609	269,047
Other real estate owned	39,097	39,475
Intangible assets, net	21,743	17,566
Goodwill	183,639	149,922
Accrued interest receivable and other assets	385,517	233,998
Total assets	12,530,073	9,405,612
Deposits:
Noninterest-bearing	5,228,774	3,775,387
Interest-bearing	5,913,914	4,316,527
Total deposits	11,142,688	8,091,914
Short-term borrowings	6,100	0
Accrued interest payable and other liabilities	109,575	55,977
Subordinated debt	86,015	85,987
Total liabilities	11,344,378	8,233,878
Stockholders' equity:
Common stock, $1.00 par, 40,000,000 shares authorized; shares issued and outstanding: 32,781,198 and 32,603,118, respectively	32,781	32,603
Capital surplus	165,295	159,914
Retained earnings	1,034,107	977,067
Accumulated other comprehensive (loss) income, net of tax of $14,406 and $(684), respectively	(46,488)	2,150
Total stockholders' equity	1,185,695	1,171,734
Total liabilities and stockholders' equity	12,530,073	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	Jun. 30, 2022	Dec. 31, 2021
Securities, fair value	$ 2,392	$ 2,978
Common stock, par value	$ 1	$ 1
Common stock, shares authorized	40,000,000	40,000,000
Common stock, shares issued	32,781,198	32,603,118
Common stock, shares outstanding	32,781,198	32,603,118
Accumulated other comprehensive (loss) income, net of tax expense (benefit)	$ 14,406	$ (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 (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
INTEREST INCOME
Loans, including fees	$ 78,726	$ 82,447	$ 151,680	$ 160,109
Debt securities:
Taxable	5,142	1,602	8,923	3,295
Tax-exempt	23	70	49	140
Federal funds sold	5		6	0
Interest-bearing deposits with banks	7,600	825	9,357	1,420
Total interest income	91,496	84,944	170,015	164,964
INTEREST EXPENSE
Deposits	3,586	2,003	5,567	4,325
Short-term borrowings	12	0	13	1
Subordinated debt	1,031	578	2,061	1,069
Total interest expense	4,629	2,581	7,641	5,395
Net interest income	86,867	82,363	162,374	159,569
Provision for (benefit from) credit losses	501	(9,949)	3,437	(9,949)
Net interest income after provision for (benefit from) credit losses	86,366	92,312	158,937	169,518
NONINTEREST INCOME
Securities transactions (includes accumulated other comprehensive loss reclassifications of $0, $0, $1,536 and $0, respectively)		172	(3,915)	267
Income from sales of loans	1,256	2,133	2,922	4,143
Insurance commissions	5,302	5,015	12,729	11,004
Cash management	4,447	3,068	7,578	6,071
Gain on sale of other assets	118	73	163	2,712
Other	5,908	10,369	16,323	14,366
Total noninterest income	42,598	44,618	86,248	84,553
NONINTEREST EXPENSE
Salaries and employee benefits	45,284	41,992	89,216	81,569
Occupancy, net	4,734	4,528	9,137	8,876
Depreciation	4,647	4,133	9,422	8,010
Amortization of intangible assets	857	809	1,688	1,602
Data processing services	1,975	1,660	3,780	3,338
Net (income) expense from other real estate owned	(510)	3,357	1,284	4,867
Marketing and business promotion	1,591	1,648	3,664	3,527
Deposit insurance	1,196	766	2,324	1,642
Other	13,943	15,130	25,714	25,555
Total noninterest expense	73,717	74,023	146,229	138,986
Income before taxes	55,247	62,907	98,956	115,085
Income tax expense	10,540	14,715	18,334	24,373
Net income	$ 44,707	$ 48,192	$ 80,622	$ 90,712
NET INCOME PER COMMON SHARE
Basic	$ 1.36	$ 1.47	$ 2.46	$ 2.77
Diluted	$ 1.34	$ 1.45	$ 2.42	$ 2.72
OTHER COMPREHENSIVE (LOSS) GAIN
Unrealized losses on debt securities, net of tax of $5,240, $472, $15,459 and $808, respectively	$ (16,972)	$ (1,007)	$ (49,805)	$ (2,013)
Reclassification adjustment for losses included in net income, net of tax of $0, $0, $(369) and $0, respectively			1,167
Other comprehensive loss, net of tax of $5,240, $472, $15,090 and $808, respectively	(16,972)	(1,007)	(48,638)	(2,013)
Comprehensive income	27,735	47,185	31,984	88,699
Trust Revenue [Member]
NONINTEREST INCOME
Revenue	3,949	3,264	7,455	6,366
Service Charges on Deposits [Member]
NONINTEREST INCOME
Revenue	$ 21,618	$ 20,524	$ 42,993	$ 39,624

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Securities transactions accumulated other comprehensive loss reclassifications	$ 0	$ 0	$ 1,536	$ 0
Unrealized losses on debt securities, tax	5,240	472	15,459	808
Reclassification adjustment for losses included in net income, tax	0	0	(369)	0
Other comprehensive loss, tax	$ 5,240	$ 472	$ 15,090	$ 808

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	COMMON STOCK [Member]	CAPITAL SURPLUS [Member]	RETAINED EARNINGS [Member]	ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) [Member]
Balance at beginning of period at Dec. 31, 2020		$ 32,720	$ 156,574	$ 871,161	$ 7,430
Shares issued for stock options		65	1,657
Net income	$ 90,712			90,712
Dividends on common stock				(22,285)
Net cash settlement of options			(958)	(4,521)
Stock-based compensation arrangements			1,049
Net change	(2,013)				(2,013)
Balance at end of period at Jun. 30, 2021	1,131,591	32,785	158,322	935,067	5,417
Balance at beginning of period at Mar. 31, 2021		32,771	157,450	898,026	6,424
Shares issued for stock options		14	399
Net income	48,192			48,192
Dividends on common stock				(11,151)
Stock-based compensation arrangements			473
Net change	(1,007)				(1,007)
Balance at end of period at Jun. 30, 2021	1,131,591	32,785	158,322	935,067	5,417
Balance at beginning of period at Dec. 31, 2021	1,171,734	32,603	159,914	977,067	2,150
Shares issued for stock options		178	4,463
Net income	80,622			80,622
Dividends on common stock				(23,582)
Stock-based compensation arrangements			918
Net change	(48,638)				(48,638)
Balance at end of period at Jun. 30, 2022	1,185,695	32,781	165,295	1,034,107	(46,488)
Balance at beginning of period at Mar. 31, 2022		32,726	163,392	1,001,200	(29,516)
Shares issued for stock options		55	1,443
Net income	44,707			44,707
Dividends on common stock				(11,800)
Stock-based compensation arrangements			460
Net change	(16,972)				(16,972)
Balance at end of period at Jun. 30, 2022	$ 1,185,695	$ 32,781	$ 165,295	$ 1,034,107	$ (46,488)

Consolidated Statements of St_2

Consolidated Statements of Stockholders' Equity (Unaudited) (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
RETAINED EARNINGS [Member]
Dividend on common stock	$ 0.36	$ 0.34	$ 0.72	$ 0.68

Consolidated Statements of Cash

Consolidated Statements of Cash Flow (Unaudited) - USD ($)	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 80,622,000	$ 90,712,000
Adjustments to reconcile to net cash provided by operating activities:
Provision for (benefit from) credit losses	3,437,000	(9,949,000)
Depreciation and amortization	11,110,000	9,612,000
Net amortization of securities premiums and discounts	2,773,000	1,670,000
Realized securities losses/(gains)	3,915,000	(267,000)
Gain on sales of loans	(2,922,000)	(4,143,000)
Cash receipts from the sale of loans originated for sale	155,075,000	221,051,000
Cash disbursements for loans originated for sale	(134,737,000)	(200,820,000)
Deferred income tax benefit	(1,806,000)	(1,495,000)
Gain on sale of other assets	(3,996,000)	(2,606,000)
(Decrease)/increase in interest receivable	(5,065,000)	2,048,000
Increase/(decrease) in interest payable	160,000	(330,000)
Amortization of stock-based compensation arrangements	918,000	1,049,000
Excess tax benefit from stock-based compensation arrangements	(1,771,000)	(1,693,000)
Other, net	12,127,000	32,989,000
Net cash provided by operating activities	119,840,000	137,828,000
INVESTING ACTIVITIES
Net cash received from acquisitions, net of cash paid	121,099,000	12,412,000
Net cash paid from sale of assets and liabilities, net of cash received		(13,733,000)
Net increase in federal funds sold	1,888,000	15,000,000
Purchases of held for investment debt securities		(845,000)
Purchases of available for sale debt securities	(1,009,340,000)	(251,673,000)
Proceeds from maturities, calls and paydowns of held for investment debt securities	66,000	820,000
Proceeds from maturities, calls and paydowns of available for sale debt securities	44,915,000	273,872,000
Proceeds from sales of available for sale securities	222,473,000	0
Purchase of equity securities	(208,000)	(470,000)
Proceeds from paydowns and sales of equity securities	699,000	392,000
Net change in loans	(190,135,000)	388,357,000
Net payments on derivative asset contracts	(84,932,000)	(3,661,000)
Purchases of premises, equipment and computer software	(11,869,000)	(15,200,000)
Purchase of tax credits	(3,676,000)	(2,048,000)
Other, net	10,519,000	3,567,000
Net cash (used in) provided by investing activities	(898,501,000)	406,790,000
FINANCING ACTIVITIES
Net change in deposits	2,620,757,000	1,444,742,000
Net change in short-term borrowings	6,100,000	2,000,000
Proceeds from issuance of subordinated notes, net of debt issuance costs		59,150,000
Issuance of common stock in connection with stock options, net	4,641,000	1,722,000
Net cash settlement of options		(5,479,000)
Cash dividends paid	(23,518,000)	(22,267,000)
Net cash provided by financing activities	2,607,980,000	1,479,868,000
Net increase in cash, due from banks and interest-bearing deposits	1,829,319,000	2,024,486,000
Cash, due from banks and interest-bearing deposits at the beginning of the period	2,050,022,000	1,616,912,000
Cash, due from banks and interest-bearing deposits at the end of the period	3,879,341,000	3,641,398,000
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Cash paid during the period for interest	7,456,000	5,736,000
Cash paid during the period for income taxes	14,080,000	15,400,000
Noncash investing and financing activities:
Cash consideration for acquisitions	77,685,000	21,000,000
Fair value of assets acquired in acquisitions	511,466,000	284,224,000
Liabilities assumed in acquisitions	433,782,000	256,412,000
Unpaid common stock dividends declared	$ 11,801,000	$ 11,143,000

Description of Business and Sum

Description of Business and Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 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 significant accounting policies can be found in Note (1) to the Company’s Annual Report on Form 10-K for the year ended December 31, 2021. Basis of Presentation The accompanying unaudited interim consolidated financial statements include the accounts of BancFirst Corporation, Council Oak Partners, LLC, BancFirst Insurance Services, Inc., Pegasus Bank ("Pegasus"), Worthington National Bank ("Worthington") and BancFirst and its subsidiaries. The principal operating subsidiaries of BancFirst are Council Oak Investment Corporation, Council Oak Real Estate, Inc., BFTower, LLC, BFC-PNC 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 unaudited interim consolidated financial statements. The accompanying unaudited interim consolidated financial statements and notes are presented in accordance with U.S. GAAP for interim financial information and the instructions for Form 10-Q adopted by the Securities and Exchange Commission (“SEC”). The information contained in the consolidated financial statements and footnotes included in BancFirst Corporation’s Annual Report on Form 10-K for the year ended December 31, 2021, should be referred to in connection with these unaudited interim consolidated financial statements. Operating results for the interim periods disclosed herein are not necessarily indicative of the results that may be expected for a full year or any future period. The unaudited interim consolidated financial statements contained herein reflect all adjustments, which are, in the opinion of management, necessary to provide a fair statement of the financial position and results of operations of the Company for the interim periods presented. All such adjustments are of a normal and recurring nature. Reclassifications Certain items in prior consolidated financial statements have been reclassified to conform to the current presentation. Such reclassifications had no effect on previously reported cash flows, stockholders’ equity or comprehensive income. Use of Estimates in the Preparation of Financial Statements The preparation of financial statements in conformity with accounting principles generally accepted in the United States 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 intangibles. Such estimates and assumptions may change over time and actual amounts realized may differ from those reported. 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. Early adoption is permitted; however the Company expects to adopt ASU 2022-02 on January 1, 2023. ASU No. 2022-02 is not expected to have a significant impact on the Company’s consolidated financial statements.

Recent Developments, Including

Recent Developments, Including Mergers and Acquisitions	6 Months Ended
	Jun. 30, 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 Office of the Comptroller of the Currency (OCC) 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 approximately $ 5.9 million and goodwill of approximately $ 33.7 million. These fair value estimates are considered preliminary and are subject to change for up to one year after the closing date of the acquisition as additional information becomes available. 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 it's 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 (7) 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 approximately $ 195 million in loans, and assumed approximately $ 256 million in deposits and certain other obligations, from The First National Bank and Trust Company of Vinita, Oklahoma for a purchase price of approximately $ 21 million. The Company recorded a bargain purchase gain related to this purchase of approximately $ 4.8 million, which was included in other noninterest income on the consolidated statement of comprehensive income and in 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 approximately $ 4.8 million, which were included in noninterest expense. As a result of the purchase, the Company recorded a core deposit intangible of approximately $ 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 approximately $ 21 million in loans and approximately $ 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 in the first quarter of 2021.

Securities

Securities	6 Months Ended
	Jun. 30, 2022
Investments, Debt and Equity Securities [Abstract]
Securities	(3) SECURITIES The following table summarizes the amortized cost and estimated fair values of debt securities held for investment: Amortized Gross Gross Estimated June 30, 2022 (Dollars in thousands) Mortgage backed securities (1) $ 21 $ 1 $ — $ 22 States and political subdivisions 1,870 — — 1,870 Other securities 500 — — 500 Total $ 2,391 $ 1 $ — $ 2,392 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 June 30, 2022 (Dollars in thousands) U.S. treasuries $ 1,205,842 $ 3 $ ( 58,987 ) $ 1,146,858 U.S. federal agencies 18,509 363 ( 1 ) 18,871 Mortgage backed securities (1) 18,689 29 ( 1,429 ) 17,289 States and political subdivisions 4,994 61 ( 179 ) 4,876 Asset backed securities 13,363 — ( 486 ) 12,877 Other securities 3,000 — ( 268 ) 2,732 Total $ 1,264,397 $ 456 $ ( 61,350 ) $ 1,203,503 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. 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. June 30, 2022 December 31, 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 1,201 1,202 2,396 2,397 After five years but within ten years 4 4 4 4 After ten years — — — — Total $ 2,391 $ 2,392 $ 2,977 $ 2,978 Available for Sale Contractual maturity of debt securities: Within one year $ 61,131 $ 61,108 $ 58,478 $ 58,688 After one year but within five years 1,025,359 976,452 408,253 410,049 After five years but within ten years 132,089 121,770 10,851 11,011 After ten years 45,818 44,173 51,107 51,775 Total debt securities $ 1,264,397 $ 1,203,503 $ 528,689 $ 531,523 The following table is a summary of the Company’s book value of securities that were pledged as collateral for public funds on deposit, repurchase agreements and for other purposes as required or permitted by law: June 30, 2022 December 31, 2021 (Dollars in thousands) Book value of pledged securities $ 476,596 $ 473,026 The following is a detail of proceeds from sales and the realized losses on available for sale debt securities: Six Months Ended June 30, 2022 2021 (Dollars in thousands) Proceeds $ 222,473 $ — Gross losses realized 3,990 — During the six months ended June 30, 2022, the Company sold $ 226 million of debt securities with an average yield of 0.16 %, 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 debt securities and therefore no proceeds from sales or realized securities gains or losses on available for sale debt securities for the six months ended June 30, 2021. 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 summarizes debt securities with unrealized losses, segregated by the duration of the unrealized loss, at June 30, 2022 and December 31, 2021 respectively: Less than 12 Months More than 12 Months Total Number of investments Estimated Unrealized Estimated Unrealized Estimated Unrealized (Dollars in thousands) June 30, 2022 Available for Sale U.S. treasuries 58 $ 1,112,058 $ 58,843 $ 4,853 $ 144 $ 1,116,911 $ 58,987 U.S. federal agencies 2 363 1 — — 363 1 Mortgage backed securities 71 15,971 1,368 657 61 16,628 1,429 States and political subdivisions 7 2,135 173 195 6 2,330 179 Asset backed securities 1 12,877 486 — — 12,877 486 Other securities 1 2,732 268 — — 2,732 268 Total 140 $ 1,146,136 $ 61,139 $ 5,705 $ 211 $ 1,151,841 $ 61,350 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 The Company 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 June 30, 2022 and December 31, 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. The Company has no intent or requirement to sell before the recovery of the unrealized loss; therefore, no 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	6 Months Ended
	Jun. 30, 2022
Receivables [Abstract]
Loans Held for Investment and Allowance for Credit Losses on Loans	(4) LOANS HELD FOR INVESTMENT AND ALLOWANCE FOR CREDIT LOSSES ON LOANS Loans held for investment are summarized by portfolio segment as follows: June 30, 2022 December 31, 2021 (Dollars in thousands) Real estate: Commercial real estate owner occupied $ 893,144 $ 775,554 Commercial real estate non-owner occupied 1,162,912 1,095,324 Construction and development < 60 months 436,658 415,466 Construction residential real estate < 60 months 285,090 254,524 Residential real estate first lien 1,072,564 937,006 Residential real estate all other 173,914 161,018 Farmland 266,790 272,179 Commercial and agricultural non-real estate (2) 1,399,702 1,416,093 Consumer non-real estate 439,723 413,370 Oil and gas 482,786 428,908 Total (1) $ 6,613,283 $ 6,169,442 (1) Excludes accrued interest receivable of $ 23.3 million at June 30, 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 $ 3.2 million, net of unamortized processing fees of $ 0 , at June 30, 2022 and $ 80.4 million, net of unamortized processing fees of $ 2.0 million, at December 31, 2021. Loans that were designated as Other and consisted mainly of Small Business Administration (“SBA”) loans were moved to their more descriptive portfolio segment. Therefore, we no longer have an Other loan portfolio segment. 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. T he Company had processing fees, which were recognized as interest income related to the PPP loans totaling approximately $ 400,000 and $ 11.9 million during the three months ended June 30, 2022 and 2021, respectively and $ 2.1 million and $ 21.7 million during the six months ended June 30, 2022 and 2021, respectively. The Company's loans are currently 83 % held by BancFirst and 17 % held by Pegasus and Worthington. In addition, approximately 65 % 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 Company's portfolio segment descriptions and the weighted average remaining life of portfolio segments are disclosed in Note (5) to the Company's Annual Report on Form 10-K for the year ended December 31, 2021. 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: June 30, 2022 December 31, 2021 (Dollars in thousands) Troubled debt restructurings $ 2,174 $ 3,665 Other real estate owned and repossessed assets $ 39,209 $ 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 approximately $ 29.7 million at June 30, 2022 and $ 29.5 million at December 31, 2021. At December 31, 2021, other real estate owned included approximately $ 2.4 million related to the Company's previous headquarters. The previous headquarters was sold during the second quarter of 2022. During the six months ended June 30, 2022, the Company sold property held in other real estate owned for a total gain of $ 3.8 million, compared to a total loss of $ 105,000 in the six months ended June 30, 2021. Nonaccrual loans The Company did no t recognize any interest income on nonaccrual loans for either of the six months ended June 30, 2022 or 2021. In addition, there were no nonaccrual loans for which there is no related allowance for credit losses at both June 30, 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 approximately $ 653,000 for the six months ended June 30, 2022 and approximately $ 1.2 million for the six months ended June 30, 2021. Nonaccrual loans guaranteed by government agencies totaled approximately $ 2.2 million at June 30, 2022 and approximately $ 3.3 million at December 31, 2021. The following table is a summary of amounts included in nonaccrual loans, segregated by portfolio segment. June 30, 2022 December 31, 2021 (Dollars in thousands) Real estate: Commercial real estate owner occupied $ 2,224 $ 4,351 Commercial real estate non-owner occupied — 407 Construction and development < 60 months 101 80 Construction residential real estate < 60 months 103 — Residential real estate first lien 2,537 2,763 Residential real estate all other 111 280 Farmland 2,540 4,224 Commercial and agricultural non-real estate 5,998 7,569 Consumer non-real estate 98 148 Oil and gas — 1,070 Total $ 13,712 $ 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 the Company's loans held for investment: Age Analysis of Past Due Loans 30-59 60-89 90 Days Total Current Total Loans Accruing (Dollars in thousands) As of June 30, 2022 Real estate: Commercial real estate owner occupied $ 1,578 $ 132 $ 726 $ 2,436 $ 890,708 $ 893,144 $ 374 Commercial real estate non-owner occupied — — 36 36 1,162,876 1,162,912 36 Construction and development < 60 months 2,890 113 33 3,036 433,622 436,658 — Construction residential real estate < 60 months — — 103 103 284,987 285,090 — Residential real estate first lien 3,688 1,038 2,231 6,957 1,065,607 1,072,564 1,600 Residential real estate all other 644 65 637 1,346 172,568 173,914 618 Farmland 600 281 2,246 3,127 263,663 266,790 1,052 Commercial and agricultural non-real estate 4,029 654 3,522 8,205 1,391,497 1,399,702 496 Consumer non-real estate 2,542 561 526 3,629 436,094 439,723 512 Oil and gas — 159 83 242 482,544 482,786 83 Total $ 15,971 $ 3,003 $ 10,143 $ 29,117 $ 6,584,166 $ 6,613,283 $ 4,771 As of 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 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 and the table summarizing the Company’s gross loans held for investment by year of origination and internally assigned credit grades as of December 31, 2021, are disclosed in Note (5) to the Company’s Annual Report on Form 10-K for the year ended December 31, 2021. The Company’s revolving loans that are converted to term loans are not material and therefore have not been presented. The following table summarizes the Company’s gross loans held for investment by year of origination and internally assigned credit grades : Term Loans Amortized Cost Basis by Origination Year 2022 2021 2020 2019 2018 Prior Revolving Loans Amortized Cost Basis Total (Dollars in thousands) As of June 30, 2022 Commercial real estate owner occupied Grade 1 $ 98,837 $ 153,898 $ 119,189 $ 98,981 $ 49,907 $ 138,353 $ 47,977 $ 707,142 Grade 2 25,774 33,972 32,759 21,243 10,083 33,359 23,049 180,239 Grade 3 — 42 452 936 341 1,606 212 3,589 Grade 4 — 303 — 851 193 520 307 2,174 Total commercial real estate owner occupied 124,611 188,215 152,400 122,011 60,524 173,838 71,545 893,144 Commercial real estate non-owner occupied Grade 1 86,546 238,973 183,794 112,077 38,979 104,280 28,735 793,384 Grade 2 58,327 54,276 45,985 49,899 32,181 86,252 29,344 356,264 Grade 3 6,996 — — 3,158 93 2,814 — 13,061 Grade 4 — — — — 203 — — 203 Total commercial real estate non-owner occupied 151,869 293,249 229,779 165,134 71,456 193,346 58,079 1,162,912 Construction and development < 60 months Grade 1 60,042 136,104 42,114 37,833 3,629 5,887 40,046 325,655 Grade 2 18,223 28,205 1,799 14,816 1,733 1,277 43,436 109,489 Grade 3 1,198 — 103 — — 2 111 1,414 Grade 4 — — 33 52 — 15 — 100 Total construction and development < 60 months 79,463 164,309 44,049 52,701 5,362 7,181 83,593 436,658 Construction residential real estate < 60 months Grade 1 119,503 94,469 3,821 26 — 44 31,831 249,694 Grade 2 18,089 14,076 347 — — 413 1,855 34,780 Grade 3 513 — — — — — — 513 Grade 4 — 103 — — — — — 103 Total construction residential real estate < 60 months 138,105 108,648 4,168 26 — 457 33,686 285,090 Residential real estate first lien Grade 1 181,536 234,262 162,322 94,607 61,203 157,490 6,396 897,816 Grade 2 23,461 39,031 25,983 14,136 12,264 44,323 — 159,198 Grade 3 1,521 1,492 1,050 1,701 1,826 3,800 — 11,390 Grade 4 — 199 184 525 987 2,265 — 4,160 Total residential real estate first lien 206,518 274,984 189,539 110,969 76,280 207,878 6,396 1,072,564 Residential real estate all other Grade 1 16,908 13,021 12,762 6,836 4,343 13,031 33,925 100,826 Grade 2 1,990 1,849 1,944 1,761 1,206 2,820 58,388 69,958 Grade 3 185 211 91 67 243 890 589 2,276 Grade 4 — 31 177 — 38 218 390 854 Total residential real estate all other 19,083 15,112 14,974 8,664 5,830 16,959 93,292 173,914 Farmland Grade 1 26,555 40,429 32,947 21,399 11,001 32,232 6,702 171,265 Grade 2 8,434 16,653 7,470 13,116 6,084 17,368 12,121 81,246 Grade 3 2,267 1,954 1,862 1,778 70 2,409 1,923 12,263 Grade 4 — 1,125 379 — 58 222 232 2,016 Total farmland 37,256 60,161 42,658 36,293 17,213 52,231 20,978 266,790 Commercial and agricultural non-real estate Grade 1 160,548 271,247 100,081 71,623 22,808 71,498 337,631 1,035,436 Grade 2 46,899 69,950 28,657 17,177 26,250 7,737 145,827 342,497 Grade 3 2,368 2,451 2,144 1,219 1,937 806 7,019 17,944 Grade 4 — 679 234 907 499 1,237 269 3,825 Total commercial and agricultural non-real estate 209,815 344,327 131,116 90,926 51,494 81,278 490,746 1,399,702 Consumer non-real estate Grade 1 112,598 141,806 55,814 30,229 10,829 3,970 35,949 391,195 Grade 2 13,357 14,002 5,298 4,529 1,395 2,042 5,233 45,856 Grade 3 296 767 405 294 127 97 2 1,988 Grade 4 64 286 87 182 64 1 — 684 Total consumer non-real estate 126,315 156,861 61,604 35,234 12,415 6,110 41,184 439,723 Oil and gas Grade 1 115,020 101,947 18,040 4,468 1,798 326 152,151 393,750 Grade 2 9,301 5,414 3,681 13,581 17,777 250 30,898 80,902 Grade 3 45 4,733 8 — — 199 2,080 7,065 Grade 4 — 1,000 — — — — 69 1,069 Total oil and gas 124,366 113,094 21,729 18,049 19,575 775 185,198 482,786 Total loans held for investment $ 1,217,401 $ 1,718,960 $ 892,016 $ 640,007 $ 320,149 $ 740,053 $ 1,084,697 $ 6,613,283 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 increase in allowance for credit loss during 2022 was primarily related to the purchase of loans without credit deterioration during the year. The decrease in the allowance for credit loss 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 loss within the loan portfolio. This reduction was partially offset by additional allowance for credit loss required for newly acquired loans. The allowance for credit loss for the oil and gas category was reduced due to the increases in oil and gas commodity prices contributing to a more stable and profitable energy industry; however this decrease was entirely offset by an increase in allowance for credit loss 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 for /(benefit from) credit losses on loans Balance at (Dollars in thousands) Three Months Ended June 30, 2022 Real estate: Commercial real estate owner occupied $ 8,281 $ — $ ( 4 ) $ 30 $ 26 $ ( 1,362 ) $ 6,945 Commercial real estate non-owner occupied 20,674 — — — — 2,263 22,937 Construction and development < 60 months 3,309 — — 2 2 417 3,728 Construction residential real estate < 60 months 2,164 — — — — 128 2,292 Residential real estate first lien 3,421 — ( 5 ) 6 1 ( 39 ) 3,383 Residential real estate all other 2,107 — ( 36 ) — ( 36 ) ( 20 ) 2,051 Farmland 4,383 — — — — ( 18 ) 4,365 Commercial and agricultural non-real estate 27,724 — ( 717 ) 30 ( 687 ) 796 27,833 Consumer non-real estate 3,771 — ( 153 ) 42 ( 111 ) 434 4,094 Oil and gas 11,405 — — — — ( 2,098 ) 9,307 Total $ 87,239 $ — $ ( 915 ) $ 110 $ ( 805 ) $ 501 $ 86,935 Six Months Ended June 30, 2022 Real estate: Commercial real estate owner occupied $ 7,568 $ — $ ( 20 ) $ 78 $ 58 $ ( 681 ) $ 6,945 Commercial real estate non-owner occupied 16,987 — — — — 5,950 22,937 Construction and development < 60 months 3,490 — — 5 5 233 3,728 Construction residential real estate < 60 months 1,092 — — — — 1,200 2,292 Residential real estate first lien 3,076 2 ( 49 ) 13 ( 36 ) 341 3,383 Residential real estate all other 2,104 — ( 36 ) 402 366 ( 419 ) 2,051 Farmland 4,822 — — — — ( 457 ) 4,365 Commercial and agricultural non-real estate 28,085 48 ( 899 ) 143 ( 756 ) 456 27,833 Consumer non-real estate 3,734 28 ( 233 ) 80 ( 153 ) 485 4,094 Oil and gas 12,978 — — — — ( 3,671 ) 9,307 Total $ 83,936 $ 78 $ ( 1,237 ) $ 721 $ ( 516 ) $ 3,437 $ 86,935 Allowance for Credit Losses Balance at Initial allowance on loans purchased with credit deterioration Charge- Recoveries Net Provision for /(benefit from) credit losses on loans Balance at (Dollars in thousands) Three Months Ended June 30, 2021 Real estate: Commercial real estate owner occupied $ 6,505 $ 987 $ — $ 1 $ 1 $ 805 $ 8,298 Commercial real estate non-owner occupied 19,115 633 ( 758 ) — ( 758 ) ( 3,952 ) 15,038 Construction and development < 60 months 2,943 173 — 2 2 ( 23 ) 3,095 Construction residential real estate < 60 months 1,092 — — — — ( 94 ) 998 Residential real estate first lien 2,937 117 ( 9 ) 12 3 ( 136 ) 2,921 Residential real estate all other 1,880 — ( 30 ) 1 ( 29 ) 112 1,963 Farmland 3,088 643 — 1 1 ( 5 ) 3,727 Commercial and agricultural non-real estate 35,439 4,711 ( 3,442 ) 125 ( 3,317 ) ( 2,523 ) 34,310 Consumer non-real estate 3,421 8 ( 209 ) 86 ( 123 ) 175 3,481 Oil and gas 14,440 — — — — ( 4,308 ) 10,132 Total $ 90,860 $ 7,272 $ ( 4,448 ) $ 228 $ ( 4,220 ) $ ( 9,949 ) $ 83,963 Six Months Ended June 30, 2021 Real estate: Commercial real estate owner occupied $ 8,470 $ 987 $ — $ 1 $ 1 $ ( 1,160 ) $ 8,298 Commercial real estate non-owner occupied 12,318 633 ( 796 ) — ( 796 ) 2,883 15,038 Construction and development < 60 months 2,723 173 — 5 5 194 3,095 Construction residential real estate < 60 months 726 — — — — 272 998 Residential real estate first lien 2,822 117 ( 52 ) 27 ( 25 ) 7 2,921 Residential real estate all other 2,236 — ( 46 ) 4 ( 42 ) ( 231 ) 1,963 Farmland 3,153 643 — 1 1 ( 70 ) 3,727 Commercial and agricultural non-real estate 34,643 4,711 ( 3,598 ) 152 ( 3,446 ) ( 1,598 ) 34,310 Consumer non-real estate 3,542 8 ( 622 ) 198 ( 424 ) 355 3,481 Oil and gas 20,733 — — — — ( 10,601 ) 10,132 Total $ 91,366 $ 7,272 $ ( 5,114 ) $ 388 $ ( 4,726 ) $ ( 9,949 ) $ 83,963 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 credit-deteriorated loans purchased during the six-month periods ended June 30, 2022 and June 30, 2021 were as follows: Loans acquired (Dollars in thousands) For the period ended June 30, 2022 Purchase price of loans at acquisition $ 661 Allowance for credit losses at acquisition 78 Par value of acquired loans at acquisition $ 739 For the period ended June 30, 2021 Purchase price of loans at acquisition $ 26,779 Allowance for credit losses at acquisition 7,272 Par value of acquired loans at acquisition $ 34,051 Collateral Dependent Loans A loan is considered collateral-dependent when the borrower is experiencing financial difficulty and repayment is expected to be provided substantially through the operation or sale of the collateral. During the six months ended June 30, 2022 and 2021 , no material amount of interest income was recognized on collateral-dependent loans subsequent to their classification as collateral-dependent. 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 (Dollars in thousands) As of June 30, 2022 Real estate: Commercial real estate owner occupied $ 1,671 $ — $ — $ — $ 1,671 $ 555 Commercial real estate non-owner occupied 1,146 — — — 1,146 214 Construction and development < 60 months — — — — — — Construction residential real estate < 60 months — — — — — — Residential real estate first lien 734 — — — 734 107 Residential real estate all other 34 — — — 34 15 Farmland 6,341 — — — 6,341 1,157 Commercial and agricultural non-real estate — 4,441 — 5,344 9,785 3,837 Consumer non-real estate — — — 39 39 35 Oil and gas — — — — — — Total collateral-dependent loans held for investment $ 9,926 $ 4,441 $ — $ 5,383 $ 19,750 $ 5,920 Collateral Type Real Estate Business Assets Energy Reserves Other Assets Total Specific Allocation (Dollars in thousands) As of December 31, 2021 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 Non-Cash Transfers from Loans and Premises and Equipment Transfers from loans and premises and equipment to other real estate owned and repossessed assets are non-cash transactions, and are not included in the statements of cash flow. Transfers from loans and premises and equipment to other real estate owned and repossessed assets during the periods presented are summarized as follows: Six Months Ended June 30, 2022 2021 (Dollars in thousands) Other real estate owned $ 4,065 $ 9,438 Repossessed assets 503 427 Total $ 4,568 $ 9,865

Intangible Assets and Goodwill

Intangible Assets and Goodwill	6 Months Ended
	Jun. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets and Goodwill	(5) INTANGIBLE ASSETS AND GOODWILL The following is a summary of intangible assets as of the date listed: Gross Accumulated Net (Dollars in thousands) June 30, 2022 Core deposit intangibles $ 33,298 $ ( 11,914 ) $ 21,384 Customer relationship intangibles 3,350 ( 2,991 ) 359 Total $ 36,648 $ ( 14,905 ) $ 21,743 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 The following is a summary of goodwill by business segment: Metropolitan Banks Community Banks Pegasus Worthington Other Financial Services Executive, Operations & Support Consolidated (Dollars in thousands) Six months ended June 30, 2022 Balance at beginning of period $ 13,767 $ 61,212 $ 68,855 $ — $ 5,464 $ 624 $ 149,922 Acquisitions — — — 33,717 — — 33,717 Balance at end of period $ 13,767 $ 61,212 $ 68,855 $ 33,717 $ 5,464 $ 624 $ 183,639 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. Additional information for intangible assets can be found in Note (7) to the Company’s Annual Report on Form 10-K for the year ended December 31, 2021 .

Leases

Leases	6 Months Ended
	Jun. 30, 2022
Leases [Abstract]
Leases	(6) 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. The following table presents rent expense for all operating leases, including those rented on a monthly or temporary basis as of the periods indicated: Three Months Ended Six Months Ended 2022 2021 2022 2021 (Dollars in thousands) Rental expense $ 491 $ 463 $ 916 $ 966 As of June 30, 2022 , the right of use lease asset included in accrued interest receivable and other assets on the consolidated balance sheet totaled $ 5.3 million, and a related lease liability included in accrued interest payable and other liabilities on the consolidated balance sheet totaled $ 5.2 million. As of June 30, 2022 , the Company's operating leases have a weighted-average remaining lease term of 3.4 years and a weighted-average discount rate of 2.3 percent. 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. June 30, 2022 (Dollars in thousands) 2022 (six months) $ 929 2023 1,565 2024 1,205 2025 989 2026 647 Thereafter 1,314 Total lease payments 6,649 Less imputed Interest ( 1,483 ) Operating lease liability $ 5,166 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 $ 1.4 million and $ 1.3 million for the three months ended June 30, 2022 and June 30, 2021, respectively. The Company had operating lease revenue of $ 2.7 million for both six months ended June 30, 2022 and June 30, 2021. Lease revenue is included in occupancy, net on the consolidated statement of comprehensive income. 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: June 30, 2022 (Dollars in thousands) 2022 (six months) $ 1,872 2023 3,043 2024 2,918 2025 2,213 2026 1,847 2027-2031 3,559 Total future minimum lease payments $ 15,452

Subordinated Debt

Subordinated Debt	6 Months Ended
	Jun. 30, 2022
Brokers and Dealers [Abstract]
Subordinated Debt	(7) 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 approximately $ 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, 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.

Stock-Based Compensation

Stock-Based Compensation	6 Months Ended
	Jun. 30, 2022
Share-based Payment Arrangement [Abstract]
Stock-Based Compensation	(8) 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 June 30, 2022 , there were 133,500 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 June 30, 2022 , there were 65,000 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 six months ended June 30, 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. The 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) Six Months Ended June 30, 2022 Outstanding at December 31, 2021 1,303,250 $ 40.90 Options granted 135,000 81.90 Options exercised ( 164,792 ) 26.05 Options canceled, forfeited, or expired ( 5,000 ) 74.90 Outstanding at June 30, 2022 1,268,458 47.06 8.32 Yrs $ 61,713 Exercisable at June 30, 2022 516,458 29.79 7.06 Yrs $ 34,043 The following table has additional information regarding options exercised under both the Employee Plan and the Non-Employee Directors’ Plan: Three Months Ended Six Months Ended 2022 2021 2022 2021 (Dollars in thousands) (Dollars in thousands) Total intrinsic value of options exercised $ 2,979 $ 557 $ 8,943 $ 7,860 Cash received from options exercised 1,303 413 4,292 4,379 Tax benefit realized from options exercised 716 142 2,150 2,002 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: Three Months Ended Six Months Ended 2022 2021 2022 2021 (Dollars in thousands) (Dollars in thousands) Stock-based compensation expense $ 460 $ 473 $ 918 $ 1,049 Tax benefit 111 114 221 252 Stock-based compensation expense, net of tax $ 349 $ 359 $ 697 $ 797 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: June 30, 2022 (Dollars in thousands) Unearned stock-based compensation expense $ 9,981 The following table shows the assumptions used for computing stock-based compensation expense under the fair value method on options granted during the periods presented: Six Months Ended June 30, 2022 2021 Weighted average grant-date fair value per share of options granted $ 29.08 $ 23.74 Risk-free interest rate 1.75 to 3.25 % 1.34 to 1.74 % Dividend yield 2.00 % 2.00 % Stock price volatility 34.61 to 34.71 % 35.55 to 36.01 % Expected term 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 June 30, 2022 , there are 29,879 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 such time as 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 13,288 and 2,161 shares of common stock distributed from the Deferred Stock Compensation Plan during the six months ended June 30, 2022 and 2021, respectively. A summary of the accumulated stock units is as follows: June 30, December 31, 2022 2021 Accumulated stock units 143,712 152,754 Average price $ 32.79 $ 30.86

Stockholders' Equity

Stockholders' Equity	6 Months Ended
	Jun. 30, 2022
Equity [Abstract]
Stockholders' Equity	(9) STOCKHOLDERS’ EQUITY In November 1999, the Company adopted the SRP. The SRP may be used as a means to increase earnings per share and return on equity. In addition, the SRP may be used 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: Six Months Ended 2022 2021 Number of shares repurchased — — Average price of shares repurchased $ — $ — Shares remaining to be repurchased 500,486 62,782 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 Federal Deposit Insurance Corporation (“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 June 30, 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: Required To Be Well For Capital With Capitalized Under Adequacy Capital Conservation Prompt Corrective Actual Purposes Buffer Action Provisions Amount Ratio Amount Ratio Amount Ratio Amount Ratio (Dollars in thousands) As of June 30, 2022: Total Capital (to Risk Weighted Assets)- BancFirst Corporation $ 1,198,933 16.02 % $ 599,086 8.00 % $ 786,300 10.50 % N/A N/A BancFirst 1,036,057 16.41 % 504,967 8.00 % 662,769 10.50 % $ 631,209 10.00 % Pegasus 101,936 11.68 % 69,794 8.00 % 91,605 10.50 % 87,243 10.00 % Worthington 43,784 15.14 % 23,138 8.00 % 30,369 10.50 % 28,923 10.00 % Common Equity Tier 1 Capital (to Risk Weighted Assets)- BancFirst Corporation $ 1,026,801 13.72 % $ 336,986 4.50 % $ 524,200 7.00 % N/A N/A BancFirst 939,308 14.88 % 284,044 4.50 % 441,846 7.00 % $ 410,286 6.50 % Pegasus 94,663 10.85 % 39,259 4.50 % 61,070 7.00 % 56,708 6.50 % Worthington 40,248 13.92 % 13,015 4.50 % 20,246 7.00 % 18,800 6.50 % Tier 1 Capital (to Risk Weighted Assets)- BancFirst Corporation $ 1,052,801 14.07 % $ 449,314 6.00 % $ 636,529 8.50 % N/A N/A BancFirst 959,308 15.20 % 378,725 6.00 % 536,527 8.50 % $ 504,967 8.00 % Pegasus 94,663 10.85 % 52,346 6.00 % 74,157 8.50 % 69,794 8.00 % Worthington 40,248 13.92 % 17,354 6.00 % 24,584 8.50 % 23,138 8.00 % Tier 1 Capital (to Total Assets)- BancFirst Corporation $ 1,052,801 8.47 % $ 497,366 4.00 % N/A N/A N/A N/A BancFirst 959,308 9.10 % 421,682 4.00 % N/A N/A $ 527,102 5.00 % Pegasus 94,663 7.04 % 53,773 4.00 % N/A N/A 67,216 5.00 % Worthington 40,248 8.00 % 20,129 4.00 % N/A N/A 25,162 5.00 % As of June 30, 2022 , the most recent notifications from the Federal Reserve Bank of Kansas City, the FDIC and the Comptroller of the Currency, 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 June 30, 2022 as the Company did not utilize the PPP Facility for funding purposes.

Net Income Per Common Share

Net Income Per Common Share	6 Months Ended
	Jun. 30, 2022
Earnings Per Share [Abstract]
Net Income Per Common Share	(10) 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) Three Months Ended June 30, 2022 Basic Income available to common stockholders $ 44,707 32,749,752 $ 1.36 Dilutive effect of stock options — 668,730 Diluted Income available to common stockholders plus assumed exercises of stock options $ 44,707 33,418,482 $ 1.34 Three Months Ended June 30, 2021 Basic Income available to common stockholders $ 48,192 32,779,227 $ 1.47 Dilutive effect of stock options — 626,696 Diluted Income available to common stockholders plus assumed exercises of stock options $ 48,192 33,405,923 $ 1.45 Six Months Ended June 30, 2022 Basic Income available to common stockholders $ 80,622 32,708,563 $ 2.46 Dilutive effect of stock options — 658,236 Diluted Income available to common stockholders plus assumed exercises of stock options $ 80,622 33,366,799 $ 2.42 Six Months Ended June 30, 2021 Basic Income available to common stockholders $ 90,712 32,768,102 $ 2.77 Dilutive effect of stock options — 639,591 Diluted Income available to common stockholders plus assumed exercises of stock options $ 90,712 33,407,693 $ 2.72 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 period because the options were anti-dilutive for the period: Shares Three Months Ended June 30, 2022 122,489 Three Months Ended June 30, 2021 43,093 Six Months Ended June 30, 2022 131,779 Six Months Ended June 30, 2021 108,055

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2022
Fair Value Disclosures [Abstract]
Fair Value Measurements	(11) 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 judgment or estimation. This category includes certain collaterally dependent 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 model. 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) June 30, 2022 Debt securities available for sale: U.S. Treasury $ 1,146,858 $ — $ — $ 1,146,858 U.S. federal agencies — 18,871 — 18,871 Mortgage-backed securities — 17,289 — 17,289 States and political subdivisions — 4,666 210 4,876 Asset backed securities — 12,877 — 12,877 Other debt securities — 2,732 — 2,732 Derivative assets — 55,174 — 55,174 Derivative liabilities — 53,943 — 53,943 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: Six Months Ended June 30, 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 — 240 Settlements ( 110 ) ( 75 ) Balance at the end of the period $ 210 $ 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 six months ended June 30, 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 Level 3 (Dollars in thousands) As of and for the Year-to-date Period Ended June 30, 2022 Equity securities $ 10,249 Collateral dependent loans 525 Repossessed assets 110 Other real estate owned 2,300 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 based on 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 debt 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. The 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: June 30, December 31, 2022 2021 Carrying Fair Value Carrying Fair Value (Dollars in thousands) FINANCIAL ASSETS Level 2 inputs: Cash and cash equivalents $ 3,879,341 $ 3,879,341 $ 2,050,022 $ 2,050,022 Federal funds sold 1,525 1,525 800 800 Debt securities held for investment 21 22 32 33 Loans held for sale 7,360 7,360 24,776 24,776 Level 3 inputs: Debt securities held for investment 2,370 2,370 2,945 2,945 Loans, net of allowance for credit losses 6,526,348 6,296,415 6,085,506 6,059,716 FINANCIAL LIABILITIES Level 2 inputs: Deposits 11,142,688 10,825,618 8,091,914 8,161,553 Short-term borrowings 6,100 6,100 — — Subordinated debt 86,015 85,100 85,987 90,391 OFF-BALANCE SHEET FINANCIAL INSTRUMENTS Loan commitments 4,350 3,648 Letters of credit 509 621 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. The overall levels of non-financial assets and non-financial liabilities measured at fair value on a nonrecurring basis were no t considered to be significant to the Company at June 30, 2022 or December 31, 2021 .

Derivative Financial Instrument

Derivative Financial Instruments	6 Months Ended
	Jun. 30, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	(12) 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 have increased during 2022 due to the current increase in oil and gas prices and customer activity. These margins are included in other assets totaling $ 98.7 million at June 30, 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: June 30, 2022 December 31, 2021 Oil and Gas Swaps and Options Notional Units Notional Estimated Notional Estimated (Notional amounts and dollars in thousands) Oil Derivative assets Barrels 3,599 $ 40,214 2,585 $ 6,563 Derivative liabilities Barrels ( 3,599 ) ( 39,506 ) ( 2,585 ) ( 6,129 ) Gas/Natural Gas Liquids Derivative assets MMBTUs/Gallons 34,990 14,960 19,752 2,383 Derivative liabilities MMBTUs/Gallons ( 34,990 ) ( 14,437 ) ( 19,752 ) ( 2,108 ) Total Fair Value Included in Derivative assets Other assets 55,174 8,946 Derivative liabilities Other liabilities ( 53,943 ) ( 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: Three Months Ended Six Months Ended June 30, 2022 2021 2022 2021 (Dollars in thousands) (Dollars in thousands) Derivative income $ 189 $ 37 $ 348 $ 39 The Company's credit exposure on oil and gas swaps and options varies based on the current market prices of oil and 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 the 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 Company's net credit exposure relating to oil and gas swaps and options with bank counterparties was zero as of both June 30, 2022 and December 31, 2021. 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	6 Months Ended
	Jun. 30, 2022
Segment Reporting [Abstract]
Segment Information	(13) 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: Metropolitan Community Pegasus Worthington Other Executive, Eliminations Consolidated (Dollars in thousands) Three Months Ended June 30, 2022 Net interest income $ 21,962 $ 49,615 $ 9,964 $ 3,743 $ 2,079 $ ( 505 ) $ 9 $ 86,867 Noninterest income 5,504 18,152 293 286 10,753 52,756 ( 45,146 ) 42,598 Income before taxes 15,142 36,462 4,672 1,436 4,643 37,901 ( 45,009 ) 55,247 Three Months Ended June 30, 2021 Net interest income $ 19,848 $ 45,024 $ 5,808 $ — $ 11,457 $ 9 $ 217 $ 82,363 Noninterest income 3,669 16,197 355 — 10,913 62,025 ( 48,541 ) 44,618 Income before taxes 17,602 36,514 1,947 — 5,220 49,790 ( 48,166 ) 62,907 Six Months Ended June 30, 2022 Net interest income $ 41,570 $ 94,183 $ 17,584 $ 5,437 $ 4,992 $ ( 1,412 ) $ 20 $ 162,374 Noninterest income 15,277 34,997 484 419 23,736 95,330 ( 83,995 ) $ 86,248 Income before taxes 33,313 67,801 7,499 1,821 10,688 61,549 ( 83,715 ) $ 98,956 Six Months Ended June 30, 2021 Net interest income $ 39,181 $ 87,794 $ 11,167 $ — $ 21,339 $ ( 398 ) $ 486 $ 159,569 Noninterest income 8,813 31,173 739 — 22,488 111,756 ( 90,416 ) $ 84,553 Income before taxes 31,526 66,283 3,592 — 11,171 92,130 ( 89,617 ) $ 115,085 Total Assets: June 30, 2022 $ 3,430,347 $ 6,899,994 $ 1,424,086 $ 540,608 $ 108,723 $ 1,574,991 $ ( 1,448,676 ) $ 12,530,073 December 31, 2021 2,627,874 5,821,220 1,045,699 — 71,694 1,201,974 ( 1,362,849 ) 9,405,612 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.

Description of Business and S_2

Description of Business and Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2022
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited interim consolidated financial statements include the accounts of BancFirst Corporation, Council Oak Partners, LLC, BancFirst Insurance Services, Inc., Pegasus Bank ("Pegasus"), Worthington National Bank ("Worthington") and BancFirst and its subsidiaries. The principal operating subsidiaries of BancFirst are Council Oak Investment Corporation, Council Oak Real Estate, Inc., BFTower, LLC, BFC-PNC 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 unaudited interim consolidated financial statements. The accompanying unaudited interim consolidated financial statements and notes are presented in accordance with U.S. GAAP for interim financial information and the instructions for Form 10-Q adopted by the Securities and Exchange Commission (“SEC”). The information contained in the consolidated financial statements and footnotes included in BancFirst Corporation’s Annual Report on Form 10-K for the year ended December 31, 2021, should be referred to in connection with these unaudited interim consolidated financial statements. Operating results for the interim periods disclosed herein are not necessarily indicative of the results that may be expected for a full year or any future period. The unaudited interim consolidated financial statements contained herein reflect all adjustments, which are, in the opinion of management, necessary to provide a fair statement of the financial position and results of operations of the Company for the interim periods presented. All such adjustments are of a normal and recurring nature.
Reclassifications	Reclassifications Certain items in prior consolidated financial statements have been reclassified to conform to the current presentation. Such reclassifications had no effect on previously reported cash flows, stockholders’ equity or comprehensive income.
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 accounting principles generally accepted in the United States 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 intangibles. Such estimates and assumptions may change over time and actual amounts realized may differ from those reported.
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. Early adoption is permitted; however the Company expects to adopt ASU 2022-02 on January 1, 2023. ASU No. 2022-02 is not expected to have a significant impact on the Company’s consolidated financial statements.

Securities (Tables)

Securities (Tables)	6 Months Ended
	Jun. 30, 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 June 30, 2022 (Dollars in thousands) Mortgage backed securities (1) $ 21 $ 1 $ — $ 22 States and political subdivisions 1,870 — — 1,870 Other securities 500 — — 500 Total $ 2,391 $ 1 $ — $ 2,392 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 June 30, 2022 (Dollars in thousands) U.S. treasuries $ 1,205,842 $ 3 $ ( 58,987 ) $ 1,146,858 U.S. federal agencies 18,509 363 ( 1 ) 18,871 Mortgage backed securities (1) 18,689 29 ( 1,429 ) 17,289 States and political subdivisions 4,994 61 ( 179 ) 4,876 Asset backed securities 13,363 — ( 486 ) 12,877 Other securities 3,000 — ( 268 ) 2,732 Total $ 1,264,397 $ 456 $ ( 61,350 ) $ 1,203,503 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. June 30, 2022 December 31, 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 1,201 1,202 2,396 2,397 After five years but within ten years 4 4 4 4 After ten years — — — — Total $ 2,391 $ 2,392 $ 2,977 $ 2,978 Available for Sale Contractual maturity of debt securities: Within one year $ 61,131 $ 61,108 $ 58,478 $ 58,688 After one year but within five years 1,025,359 976,452 408,253 410,049 After five years but within ten years 132,089 121,770 10,851 11,011 After ten years 45,818 44,173 51,107 51,775 Total debt securities $ 1,264,397 $ 1,203,503 $ 528,689 $ 531,523
Company's Book Value of Pledged Debt Securities	The following table is a summary of the Company’s book value of securities that were pledged as collateral for public funds on deposit, repurchase agreements and for other purposes as required or permitted by law: June 30, 2022 December 31, 2021 (Dollars in thousands) Book value of pledged securities $ 476,596 $ 473,026
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: Six Months Ended June 30, 2022 2021 (Dollars in thousands) Proceeds $ 222,473 $ — Gross losses realized 3,990 —
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 June 30, 2022 and December 31, 2021 respectively: Less than 12 Months More than 12 Months Total Number of investments Estimated Unrealized Estimated Unrealized Estimated Unrealized (Dollars in thousands) June 30, 2022 Available for Sale U.S. treasuries 58 $ 1,112,058 $ 58,843 $ 4,853 $ 144 $ 1,116,911 $ 58,987 U.S. federal agencies 2 363 1 — — 363 1 Mortgage backed securities 71 15,971 1,368 657 61 16,628 1,429 States and political subdivisions 7 2,135 173 195 6 2,330 179 Asset backed securities 1 12,877 486 — — 12,877 486 Other securities 1 2,732 268 — — 2,732 268 Total 140 $ 1,146,136 $ 61,139 $ 5,705 $ 211 $ 1,151,841 $ 61,350 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)	6 Months Ended
	Jun. 30, 2022
Receivables [Abstract]
Summary of Loans Held for Investment by Portfolio Segment	Loans held for investment are summarized by portfolio segment as follows: June 30, 2022 December 31, 2021 (Dollars in thousands) Real estate: Commercial real estate owner occupied $ 893,144 $ 775,554 Commercial real estate non-owner occupied 1,162,912 1,095,324 Construction and development < 60 months 436,658 415,466 Construction residential real estate < 60 months 285,090 254,524 Residential real estate first lien 1,072,564 937,006 Residential real estate all other 173,914 161,018 Farmland 266,790 272,179 Commercial and agricultural non-real estate (2) 1,399,702 1,416,093 Consumer non-real estate 439,723 413,370 Oil and gas 482,786 428,908 Total (1) $ 6,613,283 $ 6,169,442 (1) Excludes accrued interest receivable of $ 23.3 million at June 30, 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 $ 3.2 million, net of unamortized processing fees of $ 0 , at June 30, 2022 and $ 80.4 million, net of unamortized processing fees of $ 2.0 million, at December 31, 2021.
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: June 30, 2022 December 31, 2021 (Dollars in thousands) Troubled debt restructurings $ 2,174 $ 3,665 Other real estate owned and repossessed assets $ 39,209 $ 39,553
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. June 30, 2022 December 31, 2021 (Dollars in thousands) Real estate: Commercial real estate owner occupied $ 2,224 $ 4,351 Commercial real estate non-owner occupied — 407 Construction and development < 60 months 101 80 Construction residential real estate < 60 months 103 — Residential real estate first lien 2,537 2,763 Residential real estate all other 111 280 Farmland 2,540 4,224 Commercial and agricultural non-real estate 5,998 7,569 Consumer non-real estate 98 148 Oil and gas — 1,070 Total $ 13,712 $ 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 the Company's loans held for investment: Age Analysis of Past Due Loans 30-59 60-89 90 Days Total Current Total Loans Accruing (Dollars in thousands) As of June 30, 2022 Real estate: Commercial real estate owner occupied $ 1,578 $ 132 $ 726 $ 2,436 $ 890,708 $ 893,144 $ 374 Commercial real estate non-owner occupied — — 36 36 1,162,876 1,162,912 36 Construction and development < 60 months 2,890 113 33 3,036 433,622 436,658 — Construction residential real estate < 60 months — — 103 103 284,987 285,090 — Residential real estate first lien 3,688 1,038 2,231 6,957 1,065,607 1,072,564 1,600 Residential real estate all other 644 65 637 1,346 172,568 173,914 618 Farmland 600 281 2,246 3,127 263,663 266,790 1,052 Commercial and agricultural non-real estate 4,029 654 3,522 8,205 1,391,497 1,399,702 496 Consumer non-real estate 2,542 561 526 3,629 436,094 439,723 512 Oil and gas — 159 83 242 482,544 482,786 83 Total $ 15,971 $ 3,003 $ 10,143 $ 29,117 $ 6,584,166 $ 6,613,283 $ 4,771 As of 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 table summarizes the Company’s gross loans held for investment by year of origination and internally assigned credit grades : Term Loans Amortized Cost Basis by Origination Year 2022 2021 2020 2019 2018 Prior Revolving Loans Amortized Cost Basis Total (Dollars in thousands) As of June 30, 2022 Commercial real estate owner occupied Grade 1 $ 98,837 $ 153,898 $ 119,189 $ 98,981 $ 49,907 $ 138,353 $ 47,977 $ 707,142 Grade 2 25,774 33,972 32,759 21,243 10,083 33,359 23,049 180,239 Grade 3 — 42 452 936 341 1,606 212 3,589 Grade 4 — 303 — 851 193 520 307 2,174 Total commercial real estate owner occupied 124,611 188,215 152,400 122,011 60,524 173,838 71,545 893,144 Commercial real estate non-owner occupied Grade 1 86,546 238,973 183,794 112,077 38,979 104,280 28,735 793,384 Grade 2 58,327 54,276 45,985 49,899 32,181 86,252 29,344 356,264 Grade 3 6,996 — — 3,158 93 2,814 — 13,061 Grade 4 — — — — 203 — — 203 Total commercial real estate non-owner occupied 151,869 293,249 229,779 165,134 71,456 193,346 58,079 1,162,912 Construction and development < 60 months Grade 1 60,042 136,104 42,114 37,833 3,629 5,887 40,046 325,655 Grade 2 18,223 28,205 1,799 14,816 1,733 1,277 43,436 109,489 Grade 3 1,198 — 103 — — 2 111 1,414 Grade 4 — — 33 52 — 15 — 100 Total construction and development < 60 months 79,463 164,309 44,049 52,701 5,362 7,181 83,593 436,658 Construction residential real estate < 60 months Grade 1 119,503 94,469 3,821 26 — 44 31,831 249,694 Grade 2 18,089 14,076 347 — — 413 1,855 34,780 Grade 3 513 — — — — — — 513 Grade 4 — 103 — — — — — 103 Total construction residential real estate < 60 months 138,105 108,648 4,168 26 — 457 33,686 285,090 Residential real estate first lien Grade 1 181,536 234,262 162,322 94,607 61,203 157,490 6,396 897,816 Grade 2 23,461 39,031 25,983 14,136 12,264 44,323 — 159,198 Grade 3 1,521 1,492 1,050 1,701 1,826 3,800 — 11,390 Grade 4 — 199 184 525 987 2,265 — 4,160 Total residential real estate first lien 206,518 274,984 189,539 110,969 76,280 207,878 6,396 1,072,564 Residential real estate all other Grade 1 16,908 13,021 12,762 6,836 4,343 13,031 33,925 100,826 Grade 2 1,990 1,849 1,944 1,761 1,206 2,820 58,388 69,958 Grade 3 185 211 91 67 243 890 589 2,276 Grade 4 — 31 177 — 38 218 390 854 Total residential real estate all other 19,083 15,112 14,974 8,664 5,830 16,959 93,292 173,914 Farmland Grade 1 26,555 40,429 32,947 21,399 11,001 32,232 6,702 171,265 Grade 2 8,434 16,653 7,470 13,116 6,084 17,368 12,121 81,246 Grade 3 2,267 1,954 1,862 1,778 70 2,409 1,923 12,263 Grade 4 — 1,125 379 — 58 222 232 2,016 Total farmland 37,256 60,161 42,658 36,293 17,213 52,231 20,978 266,790 Commercial and agricultural non-real estate Grade 1 160,548 271,247 100,081 71,623 22,808 71,498 337,631 1,035,436 Grade 2 46,899 69,950 28,657 17,177 26,250 7,737 145,827 342,497 Grade 3 2,368 2,451 2,144 1,219 1,937 806 7,019 17,944 Grade 4 — 679 234 907 499 1,237 269 3,825 Total commercial and agricultural non-real estate 209,815 344,327 131,116 90,926 51,494 81,278 490,746 1,399,702 Consumer non-real estate Grade 1 112,598 141,806 55,814 30,229 10,829 3,970 35,949 391,195 Grade 2 13,357 14,002 5,298 4,529 1,395 2,042 5,233 45,856 Grade 3 296 767 405 294 127 97 2 1,988 Grade 4 64 286 87 182 64 1 — 684 Total consumer non-real estate 126,315 156,861 61,604 35,234 12,415 6,110 41,184 439,723 Oil and gas Grade 1 115,020 101,947 18,040 4,468 1,798 326 152,151 393,750 Grade 2 9,301 5,414 3,681 13,581 17,777 250 30,898 80,902 Grade 3 45 4,733 8 — — 199 2,080 7,065 Grade 4 — 1,000 — — — — 69 1,069 Total oil and gas 124,366 113,094 21,729 18,049 19,575 775 185,198 482,786 Total loans held for investment $ 1,217,401 $ 1,718,960 $ 892,016 $ 640,007 $ 320,149 $ 740,053 $ 1,084,697 $ 6,613,283
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 for /(benefit from) credit losses on loans Balance at (Dollars in thousands) Three Months Ended June 30, 2022 Real estate: Commercial real estate owner occupied $ 8,281 $ — $ ( 4 ) $ 30 $ 26 $ ( 1,362 ) $ 6,945 Commercial real estate non-owner occupied 20,674 — — — — 2,263 22,937 Construction and development < 60 months 3,309 — — 2 2 417 3,728 Construction residential real estate < 60 months 2,164 — — — — 128 2,292 Residential real estate first lien 3,421 — ( 5 ) 6 1 ( 39 ) 3,383 Residential real estate all other 2,107 — ( 36 ) — ( 36 ) ( 20 ) 2,051 Farmland 4,383 — — — — ( 18 ) 4,365 Commercial and agricultural non-real estate 27,724 — ( 717 ) 30 ( 687 ) 796 27,833 Consumer non-real estate 3,771 — ( 153 ) 42 ( 111 ) 434 4,094 Oil and gas 11,405 — — — — ( 2,098 ) 9,307 Total $ 87,239 $ — $ ( 915 ) $ 110 $ ( 805 ) $ 501 $ 86,935 Six Months Ended June 30, 2022 Real estate: Commercial real estate owner occupied $ 7,568 $ — $ ( 20 ) $ 78 $ 58 $ ( 681 ) $ 6,945 Commercial real estate non-owner occupied 16,987 — — — — 5,950 22,937 Construction and development < 60 months 3,490 — — 5 5 233 3,728 Construction residential real estate < 60 months 1,092 — — — — 1,200 2,292 Residential real estate first lien 3,076 2 ( 49 ) 13 ( 36 ) 341 3,383 Residential real estate all other 2,104 — ( 36 ) 402 366 ( 419 ) 2,051 Farmland 4,822 — — — — ( 457 ) 4,365 Commercial and agricultural non-real estate 28,085 48 ( 899 ) 143 ( 756 ) 456 27,833 Consumer non-real estate 3,734 28 ( 233 ) 80 ( 153 ) 485 4,094 Oil and gas 12,978 — — — — ( 3,671 ) 9,307 Total $ 83,936 $ 78 $ ( 1,237 ) $ 721 $ ( 516 ) $ 3,437 $ 86,935 Allowance for Credit Losses Balance at Initial allowance on loans purchased with credit deterioration Charge- Recoveries Net Provision for /(benefit from) credit losses on loans Balance at (Dollars in thousands) Three Months Ended June 30, 2021 Real estate: Commercial real estate owner occupied $ 6,505 $ 987 $ — $ 1 $ 1 $ 805 $ 8,298 Commercial real estate non-owner occupied 19,115 633 ( 758 ) — ( 758 ) ( 3,952 ) 15,038 Construction and development < 60 months 2,943 173 — 2 2 ( 23 ) 3,095 Construction residential real estate < 60 months 1,092 — — — — ( 94 ) 998 Residential real estate first lien 2,937 117 ( 9 ) 12 3 ( 136 ) 2,921 Residential real estate all other 1,880 — ( 30 ) 1 ( 29 ) 112 1,963 Farmland 3,088 643 — 1 1 ( 5 ) 3,727 Commercial and agricultural non-real estate 35,439 4,711 ( 3,442 ) 125 ( 3,317 ) ( 2,523 ) 34,310 Consumer non-real estate 3,421 8 ( 209 ) 86 ( 123 ) 175 3,481 Oil and gas 14,440 — — — — ( 4,308 ) 10,132 Total $ 90,860 $ 7,272 $ ( 4,448 ) $ 228 $ ( 4,220 ) $ ( 9,949 ) $ 83,963 Six Months Ended June 30, 2021 Real estate: Commercial real estate owner occupied $ 8,470 $ 987 $ — $ 1 $ 1 $ ( 1,160 ) $ 8,298 Commercial real estate non-owner occupied 12,318 633 ( 796 ) — ( 796 ) 2,883 15,038 Construction and development < 60 months 2,723 173 — 5 5 194 3,095 Construction residential real estate < 60 months 726 — — — — 272 998 Residential real estate first lien 2,822 117 ( 52 ) 27 ( 25 ) 7 2,921 Residential real estate all other 2,236 — ( 46 ) 4 ( 42 ) ( 231 ) 1,963 Farmland 3,153 643 — 1 1 ( 70 ) 3,727 Commercial and agricultural non-real estate 34,643 4,711 ( 3,598 ) 152 ( 3,446 ) ( 1,598 ) 34,310 Consumer non-real estate 3,542 8 ( 622 ) 198 ( 424 ) 355 3,481 Oil and gas 20,733 — — — — ( 10,601 ) 10,132 Total $ 91,366 $ 7,272 $ ( 5,114 ) $ 388 $ ( 4,726 ) $ ( 9,949 ) $ 83,963
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 credit-deteriorated loans purchased during the six-month periods ended June 30, 2022 and June 30, 2021 were as follows: Loans acquired (Dollars in thousands) For the period ended June 30, 2022 Purchase price of loans at acquisition $ 661 Allowance for credit losses at acquisition 78 Par value of acquired loans at acquisition $ 739 For the period ended June 30, 2021 Purchase price of loans at acquisition $ 26,779 Allowance for credit losses at acquisition 7,272 Par value of acquired loans at acquisition $ 34,051
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 (Dollars in thousands) As of June 30, 2022 Real estate: Commercial real estate owner occupied $ 1,671 $ — $ — $ — $ 1,671 $ 555 Commercial real estate non-owner occupied 1,146 — — — 1,146 214 Construction and development < 60 months — — — — — — Construction residential real estate < 60 months — — — — — — Residential real estate first lien 734 — — — 734 107 Residential real estate all other 34 — — — 34 15 Farmland 6,341 — — — 6,341 1,157 Commercial and agricultural non-real estate — 4,441 — 5,344 9,785 3,837 Consumer non-real estate — — — 39 39 35 Oil and gas — — — — — — Total collateral-dependent loans held for investment $ 9,926 $ 4,441 $ — $ 5,383 $ 19,750 $ 5,920 Collateral Type Real Estate Business Assets Energy Reserves Other Assets Total Specific Allocation (Dollars in thousands) As of December 31, 2021 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 and Repossessed Assets	Transfers from loans and premises and equipment to other real estate owned and repossessed assets during the periods presented are summarized as follows: Six Months Ended June 30, 2022 2021 (Dollars in thousands) Other real estate owned $ 4,065 $ 9,438 Repossessed assets 503 427 Total $ 4,568 $ 9,865

Intangible Assets and Goodwill

Intangible Assets and Goodwill (Tables)	6 Months Ended
	Jun. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of Intangible Assets	The following is a summary of intangible assets as of the date listed: Gross Accumulated Net (Dollars in thousands) June 30, 2022 Core deposit intangibles $ 33,298 $ ( 11,914 ) $ 21,384 Customer relationship intangibles 3,350 ( 2,991 ) 359 Total $ 36,648 $ ( 14,905 ) $ 21,743 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
Summary of Goodwill by Business Segment	The following is a summary of goodwill by business segment: Metropolitan Banks Community Banks Pegasus Worthington Other Financial Services Executive, Operations & Support Consolidated (Dollars in thousands) Six months ended June 30, 2022 Balance at beginning of period $ 13,767 $ 61,212 $ 68,855 $ — $ 5,464 $ 624 $ 149,922 Acquisitions — — — 33,717 — — 33,717 Balance at end of period $ 13,767 $ 61,212 $ 68,855 $ 33,717 $ 5,464 $ 624 $ 183,639

Leases (Tables)

Leases (Tables)	6 Months Ended
	Jun. 30, 2022
Leases [Abstract]
Schedule of Rent Expense of Operating Leases	The following table presents rent expense for all operating leases, including those rented on a monthly or temporary basis as of the periods indicated: Three Months Ended Six Months Ended 2022 2021 2022 2021 (Dollars in thousands) Rental expense $ 491 $ 463 $ 916 $ 966
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. June 30, 2022 (Dollars in thousands) 2022 (six months) $ 929 2023 1,565 2024 1,205 2025 989 2026 647 Thereafter 1,314 Total lease payments 6,649 Less imputed Interest ( 1,483 ) Operating lease liability $ 5,166
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: June 30, 2022 (Dollars in thousands) 2022 (six months) $ 1,872 2023 3,043 2024 2,918 2025 2,213 2026 1,847 2027-2031 3,559 Total future minimum lease payments $ 15,452

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	6 Months Ended
	Jun. 30, 2022
Share-based Payment Arrangement [Abstract]
Summary of Activity Under Stock Option Plan	The 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) Six Months Ended June 30, 2022 Outstanding at December 31, 2021 1,303,250 $ 40.90 Options granted 135,000 81.90 Options exercised ( 164,792 ) 26.05 Options canceled, forfeited, or expired ( 5,000 ) 74.90 Outstanding at June 30, 2022 1,268,458 47.06 8.32 Yrs $ 61,713 Exercisable at June 30, 2022 516,458 29.79 7.06 Yrs $ 34,043
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: Three Months Ended Six Months Ended 2022 2021 2022 2021 (Dollars in thousands) (Dollars in thousands) Total intrinsic value of options exercised $ 2,979 $ 557 $ 8,943 $ 7,860 Cash received from options exercised 1,303 413 4,292 4,379 Tax benefit realized from options exercised 716 142 2,150 2,002
Stock-based Employee Compensation Expense	The following table is a summary of the Company’s recorded stock-based compensation expense: Three Months Ended Six Months Ended 2022 2021 2022 2021 (Dollars in thousands) (Dollars in thousands) Stock-based compensation expense $ 460 $ 473 $ 918 $ 1,049 Tax benefit 111 114 221 252 Stock-based compensation expense, net of tax $ 349 $ 359 $ 697 $ 797
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: June 30, 2022 (Dollars in thousands) Unearned stock-based compensation expense $ 9,981
Assumptions Used for Computing Stock-Based Compensation Expense	The following table shows the assumptions used for computing stock-based compensation expense under the fair value method on options granted during the periods presented: Six Months Ended June 30, 2022 2021 Weighted average grant-date fair value per share of options granted $ 29.08 $ 23.74 Risk-free interest rate 1.75 to 3.25 % 1.34 to 1.74 % Dividend yield 2.00 % 2.00 % Stock price volatility 34.61 to 34.71 % 35.55 to 36.01 % Expected term 10 Yrs 10 Yrs
Summary of Accumulated Stock Units	A summary of the accumulated stock units is as follows: June 30, December 31, 2022 2021 Accumulated stock units 143,712 152,754 Average price $ 32.79 $ 30.86

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	6 Months Ended
	Jun. 30, 2022
Equity [Abstract]
Summary of Shares Repurchased Under Stock Purchase Program	The following table is a summary of the shares under the program: Six Months Ended 2022 2021 Number of shares repurchased — — Average price of shares repurchased $ — $ — Shares remaining to be repurchased 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: Required To Be Well For Capital With Capitalized Under Adequacy Capital Conservation Prompt Corrective Actual Purposes Buffer Action Provisions Amount Ratio Amount Ratio Amount Ratio Amount Ratio (Dollars in thousands) As of June 30, 2022: Total Capital (to Risk Weighted Assets)- BancFirst Corporation $ 1,198,933 16.02 % $ 599,086 8.00 % $ 786,300 10.50 % N/A N/A BancFirst 1,036,057 16.41 % 504,967 8.00 % 662,769 10.50 % $ 631,209 10.00 % Pegasus 101,936 11.68 % 69,794 8.00 % 91,605 10.50 % 87,243 10.00 % Worthington 43,784 15.14 % 23,138 8.00 % 30,369 10.50 % 28,923 10.00 % Common Equity Tier 1 Capital (to Risk Weighted Assets)- BancFirst Corporation $ 1,026,801 13.72 % $ 336,986 4.50 % $ 524,200 7.00 % N/A N/A BancFirst 939,308 14.88 % 284,044 4.50 % 441,846 7.00 % $ 410,286 6.50 % Pegasus 94,663 10.85 % 39,259 4.50 % 61,070 7.00 % 56,708 6.50 % Worthington 40,248 13.92 % 13,015 4.50 % 20,246 7.00 % 18,800 6.50 % Tier 1 Capital (to Risk Weighted Assets)- BancFirst Corporation $ 1,052,801 14.07 % $ 449,314 6.00 % $ 636,529 8.50 % N/A N/A BancFirst 959,308 15.20 % 378,725 6.00 % 536,527 8.50 % $ 504,967 8.00 % Pegasus 94,663 10.85 % 52,346 6.00 % 74,157 8.50 % 69,794 8.00 % Worthington 40,248 13.92 % 17,354 6.00 % 24,584 8.50 % 23,138 8.00 % Tier 1 Capital (to Total Assets)- BancFirst Corporation $ 1,052,801 8.47 % $ 497,366 4.00 % N/A N/A N/A N/A BancFirst 959,308 9.10 % 421,682 4.00 % N/A N/A $ 527,102 5.00 % Pegasus 94,663 7.04 % 53,773 4.00 % N/A N/A 67,216 5.00 % Worthington 40,248 8.00 % 20,129 4.00 % N/A N/A 25,162 5.00 %

Net Income Per Common Share (Ta

Net Income Per Common Share (Tables)	6 Months Ended
	Jun. 30, 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) Three Months Ended June 30, 2022 Basic Income available to common stockholders $ 44,707 32,749,752 $ 1.36 Dilutive effect of stock options — 668,730 Diluted Income available to common stockholders plus assumed exercises of stock options $ 44,707 33,418,482 $ 1.34 Three Months Ended June 30, 2021 Basic Income available to common stockholders $ 48,192 32,779,227 $ 1.47 Dilutive effect of stock options — 626,696 Diluted Income available to common stockholders plus assumed exercises of stock options $ 48,192 33,405,923 $ 1.45 Six Months Ended June 30, 2022 Basic Income available to common stockholders $ 80,622 32,708,563 $ 2.46 Dilutive effect of stock options — 658,236 Diluted Income available to common stockholders plus assumed exercises of stock options $ 80,622 33,366,799 $ 2.42 Six Months Ended June 30, 2021 Basic Income available to common stockholders $ 90,712 32,768,102 $ 2.77 Dilutive effect of stock options — 639,591 Diluted Income available to common stockholders plus assumed exercises of stock options $ 90,712 33,407,693 $ 2.72
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 period because the options were anti-dilutive for the period: Shares Three Months Ended June 30, 2022 122,489 Three Months Ended June 30, 2021 43,093 Six Months Ended June 30, 2022 131,779 Six Months Ended June 30, 2021 108,055

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 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) June 30, 2022 Debt securities available for sale: U.S. Treasury $ 1,146,858 $ — $ — $ 1,146,858 U.S. federal agencies — 18,871 — 18,871 Mortgage-backed securities — 17,289 — 17,289 States and political subdivisions — 4,666 210 4,876 Asset backed securities — 12,877 — 12,877 Other debt securities — 2,732 — 2,732 Derivative assets — 55,174 — 55,174 Derivative liabilities — 53,943 — 53,943 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: Six Months Ended June 30, 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 — 240 Settlements ( 110 ) ( 75 ) Balance at the end of the period $ 210 $ 320
Assets Measured at Fair Value on Nonrecurring Basis	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 Level 3 (Dollars in thousands) As of and for the Year-to-date Period Ended June 30, 2022 Equity securities $ 10,249 Collateral dependent loans 525 Repossessed assets 110 Other real estate owned 2,300 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	The 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: June 30, December 31, 2022 2021 Carrying Fair Value Carrying Fair Value (Dollars in thousands) FINANCIAL ASSETS Level 2 inputs: Cash and cash equivalents $ 3,879,341 $ 3,879,341 $ 2,050,022 $ 2,050,022 Federal funds sold 1,525 1,525 800 800 Debt securities held for investment 21 22 32 33 Loans held for sale 7,360 7,360 24,776 24,776 Level 3 inputs: Debt securities held for investment 2,370 2,370 2,945 2,945 Loans, net of allowance for credit losses 6,526,348 6,296,415 6,085,506 6,059,716 FINANCIAL LIABILITIES Level 2 inputs: Deposits 11,142,688 10,825,618 8,091,914 8,161,553 Short-term borrowings 6,100 6,100 — — Subordinated debt 86,015 85,100 85,987 90,391 OFF-BALANCE SHEET FINANCIAL INSTRUMENTS Loan commitments 4,350 3,648 Letters of credit 509 621

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 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: June 30, 2022 December 31, 2021 Oil and Gas Swaps and Options Notional Units Notional Estimated Notional Estimated (Notional amounts and dollars in thousands) Oil Derivative assets Barrels 3,599 $ 40,214 2,585 $ 6,563 Derivative liabilities Barrels ( 3,599 ) ( 39,506 ) ( 2,585 ) ( 6,129 ) Gas/Natural Gas Liquids Derivative assets MMBTUs/Gallons 34,990 14,960 19,752 2,383 Derivative liabilities MMBTUs/Gallons ( 34,990 ) ( 14,437 ) ( 19,752 ) ( 2,108 ) Total Fair Value Included in Derivative assets Other assets 55,174 8,946 Derivative liabilities Other liabilities ( 53,943 ) ( 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: Three Months Ended Six Months Ended June 30, 2022 2021 2022 2021 (Dollars in thousands) (Dollars in thousands) Derivative income $ 189 $ 37 $ 348 $ 39

Segment Information (Tables)

Segment Information (Tables)	6 Months Ended
	Jun. 30, 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: Metropolitan Community Pegasus Worthington Other Executive, Eliminations Consolidated (Dollars in thousands) Three Months Ended June 30, 2022 Net interest income $ 21,962 $ 49,615 $ 9,964 $ 3,743 $ 2,079 $ ( 505 ) $ 9 $ 86,867 Noninterest income 5,504 18,152 293 286 10,753 52,756 ( 45,146 ) 42,598 Income before taxes 15,142 36,462 4,672 1,436 4,643 37,901 ( 45,009 ) 55,247 Three Months Ended June 30, 2021 Net interest income $ 19,848 $ 45,024 $ 5,808 $ — $ 11,457 $ 9 $ 217 $ 82,363 Noninterest income 3,669 16,197 355 — 10,913 62,025 ( 48,541 ) 44,618 Income before taxes 17,602 36,514 1,947 — 5,220 49,790 ( 48,166 ) 62,907 Six Months Ended June 30, 2022 Net interest income $ 41,570 $ 94,183 $ 17,584 $ 5,437 $ 4,992 $ ( 1,412 ) $ 20 $ 162,374 Noninterest income 15,277 34,997 484 419 23,736 95,330 ( 83,995 ) $ 86,248 Income before taxes 33,313 67,801 7,499 1,821 10,688 61,549 ( 83,715 ) $ 98,956 Six Months Ended June 30, 2021 Net interest income $ 39,181 $ 87,794 $ 11,167 $ — $ 21,339 $ ( 398 ) $ 486 $ 159,569 Noninterest income 8,813 31,173 739 — 22,488 111,756 ( 90,416 ) $ 84,553 Income before taxes 31,526 66,283 3,592 — 11,171 92,130 ( 89,617 ) $ 115,085 Total Assets: June 30, 2022 $ 3,430,347 $ 6,899,994 $ 1,424,086 $ 540,608 $ 108,723 $ 1,574,991 $ ( 1,448,676 ) $ 12,530,073 December 31, 2021 2,627,874 5,821,220 1,045,699 — 71,694 1,201,974 ( 1,362,849 ) 9,405,612

Recent Developments, Includin_2

Recent Developments, Including Mergers and Acquisitions - Additional Information (Detail) $ in Thousands				3 Months Ended
	Feb. 08, 2022 USD ($) Location	Jun. 17, 2021 USD ($)	May 20, 2021 USD ($) Location	Mar. 31, 2021 USD ($)	Jun. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)	Jan. 22, 2021 USD ($)
Business Combination Separately Recognized Transactions [Line Items]
Total assets					$ 12,530,073	$ 9,405,612
Loans held for investment (net of unearned interest)					6,613,283	6,169,442
Deposits					11,142,688	8,091,914
Goodwill					$ 183,639	$ 149,922
First National Bank and Trust [Member]
Business Combination Separately Recognized Transactions [Line Items]
Purchase price			$ 21,000
Total assets			284,000
Loans held for investment (net of unearned interest)			195,000
Deposits			256,000
Bargain purchase gain			4,800
Purchase expenses			4,800
Intangibles assets, net			$ 1,700
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
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
Oklahoma [Member] | First National Bank and Trust [Member]
Business Combination Separately Recognized Transactions [Line Items]
Number of banking locations | Location			2
Worthington [Member]
Business Combination Separately Recognized Transactions [Line Items]
Purchase price	$ 77,700
Total assets	478,000
Loans held for investment (net of unearned interest)	257,000
Deposits	430,000
Intangibles assets, net	5,900
Goodwill	$ 33,700
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

Securities - Summary of Amortiz

Securities - Summary of Amortized Cost and Estimated Fair Values of Debt Securities Held for Investment (Detail) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 2,391	$ 2,977
Gross Unrealized Gains	1	1
Estimated Fair Value	2,392	2,978
Mortgage Backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	21	32
Gross Unrealized Gains	1	1
Estimated Fair Value	22	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	Jun. 30, 2022	Dec. 31, 2021
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 1,264,397	$ 528,689
Gross Unrealized Gains	456	4,625
Gross Unrealized Losses	(61,350)	(1,791)
Estimated Fair Value	1,203,503	531,523
U.S. Treasuries [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,205,842	455,701
Gross Unrealized Gains	3	3,693
Gross Unrealized Losses	(58,987)	(1,766)
Estimated Fair Value	1,146,858	457,628
U.S. Federal Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	18,509	21,609
Gross Unrealized Gains	363	335
Gross Unrealized Losses	(1)	(2)
Estimated Fair Value	18,871	21,942
Mortgage Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	18,689	28,897
Gross Unrealized Gains	29	400
Gross Unrealized Losses	(1,429)	(14)
Estimated Fair Value	17,289	29,283
States and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	4,994	6,128
Gross Unrealized Gains	61	194
Gross Unrealized Losses	(179)	(3)
Estimated Fair Value	4,876	6,319
Asset backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	13,363	13,354
Gross Unrealized Gains		3
Gross Unrealized Losses	(486)
Estimated Fair Value	12,877	13,357
Other Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	3,000	3,000
Gross Unrealized Losses	(268)	(6)
Estimated Fair Value	$ 2,732	$ 2,994

Securities - Additional Informa

Securities - Additional Information (Detail) - USD ($)	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jan. 10, 2022
Debt Securities, Available-for-sale [Line Items]
Sale of low yielding securities	$ 226,000,000
Debt securities. average yield percentage	0.16%
Reinvested in debt securities	$ 220,000,000
Reinvested debt securities, average yield percentage	1.86%
Proceeds from sales of available for sale securities	$ 222,473,000	$ 0
Avaliable for sale of debt securities realized gains or losses		$ 0
United States Treasury Notes [Member]
Debt Securities, Available-for-sale [Line Items]
Debt securities purchased at par value			$ 600,000,000
Debt securities. average yield percentage			1.42%
Debt securities, average maturity term			53 months

Securities - Maturity of Debt S

Securities - Maturity of Debt Securities (Detail) - USD ($) $ in Thousands	Jun. 30, 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	1,201	2,396
Amortized cost, After five years but within ten years	4	4
Amortized Cost	2,391	2,977
Available for sale, Contractual maturity of debt securities, Amortized Cost
Amortized Cost, Within one year	61,131	58,478
Amortized Cost, After one year but within five years	1,025,359	408,253
Amortized Cost, After five years but within ten years	132,089	10,851
Amortized Cost, After ten years	45,818	51,107
Amortized Cost	1,264,397	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	1,202	2,397
Estimated Fair Value, After five years but within ten years	4	4
Estimated Fair Value	2,392	2,978
Available for sale, Contractual maturity of debt securities, Estimated Fair Value
Estimated Fair Value, Within one year	61,108	58,688
Estimated Fair Value, After one year but within five years	976,452	410,049
Estimated Fair Value, After five years but within ten years	121,770	11,011
Estimated Fair Value, After ten years	44,173	51,775
Total debt securities	$ 1,203,503	$ 531,523

Securities - Company's Book Val

Securities - Company's Book Value of Pledged Debt Securities (Detail) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Pledged Financial Instruments, Not Separately Reported, Securities, by Type of Security [Abstract]
Book value of pledged securities	$ 476,596	$ 473,026

Securities - Schedule of Procee

Securities - Schedule of Proceeds from Sales and Realized Losses on Available for Sale Sebt Securities (Detail) - USD ($)	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Investments, Debt and Equity Securities [Abstract]
Proceeds	$ 222,473,000	$ 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	Jun. 30, 2022 USD ($) Investments	Dec. 31, 2021 USD ($) Investments
Debt Securities, Available-for-sale [Abstract]
Number of investments | Investments	140	21
Available-for-sale Securities, Less than 12 Months, Fair Value	$ 1,146,136	$ 304,779
Available-for-sale Securities, Less than 12 Months, Unrealized Losses	61,139	1,791
Available-for-sale Securities, 12 Months or Longer, Fair Value	5,705
Available-for-sale Securities, 12 Months or Longer, Unrealized Losses	211
Available-for-sale Securities, Fair Value, Total	1,151,841	304,779
Available-for-sale Securities, Unrealized Losses, Total	$ 61,350	$ 1,791
U.S. Treasuries [Member]
Debt Securities, Available-for-sale [Abstract]
Number of investments | Investments	58	10
Available-for-sale Securities, Less than 12 Months, Fair Value	$ 1,112,058	$ 298,080
Available-for-sale Securities, Less than 12 Months, Unrealized Losses	58,843	1,766
Available-for-sale Securities, 12 Months or Longer, Fair Value	4,853
Available-for-sale Securities, 12 Months or Longer, Unrealized Losses	144
Available-for-sale Securities, Fair Value, Total	1,116,911	298,080
Available-for-sale Securities, Unrealized Losses, Total	$ 58,987	$ 1,766
U.S. Federal Agencies [Member]
Debt Securities, Available-for-sale [Abstract]
Number of investments | Investments	2	1
Available-for-sale Securities, Less than 12 Months, Fair Value	$ 363	$ 376
Available-for-sale Securities, Less than 12 Months, Unrealized Losses	1	2
Available-for-sale Securities, Fair Value, Total	363	376
Available-for-sale Securities, Unrealized Losses, Total	$ 1	$ 2
Mortgage Backed Securities [Member]
Debt Securities, Available-for-sale [Abstract]
Number of investments | Investments	71	7
Available-for-sale Securities, Less than 12 Months, Fair Value	$ 15,971	$ 2,824
Available-for-sale Securities, Less than 12 Months, Unrealized Losses	1,368	14
Available-for-sale Securities, 12 Months or Longer, Fair Value	657
Available-for-sale Securities, 12 Months or Longer, Unrealized Losses	61
Available-for-sale Securities, Fair Value, Total	16,628	2,824
Available-for-sale Securities, Unrealized Losses, Total	$ 1,429	$ 14
States and Political Subdivisions [Member]
Debt Securities, Available-for-sale [Abstract]
Number of investments | Investments	7	2
Available-for-sale Securities, Less than 12 Months, Fair Value	$ 2,135	$ 505
Available-for-sale Securities, Less than 12 Months, Unrealized Losses	173	3
Available-for-sale Securities, 12 Months or Longer, Fair Value	195
Available-for-sale Securities, 12 Months or Longer, Unrealized Losses	6
Available-for-sale Securities, Fair Value, Total	2,330	505
Available-for-sale Securities, Unrealized Losses, Total	$ 179	$ 3
Asset backed Securities [Member]
Debt Securities, Available-for-sale [Abstract]
Number of investments | Investments	1
Available-for-sale Securities, Less than 12 Months, Fair Value	$ 12,877
Available-for-sale Securities, Less than 12 Months, Unrealized Losses	486
Available-for-sale Securities, Fair Value, Total	12,877
Available-for-sale Securities, Unrealized Losses, Total	$ 486
Other Securities [Member]
Debt Securities, Available-for-sale [Abstract]
Number of investments | Investments	1	1
Available-for-sale Securities, Less than 12 Months, Fair Value	$ 2,732	$ 2,994
Available-for-sale Securities, Less than 12 Months, Unrealized Losses	268	6
Available-for-sale Securities, Fair Value, Total	2,732	2,994
Available-for-sale Securities, Unrealized Losses, Total	$ 268	$ 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	Jun. 30, 2022	Dec. 31, 2021
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment (net of unearned interest)	$ 6,613,283	$ 6,169,442
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)	893,144	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)	1,162,912	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)	436,658	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)	285,090	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)	1,072,564	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)	173,914	161,018
Real Estate [Member] | Farmland [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment (net of unearned interest)	266,790	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)	1,399,702	1,416,093
Consumer Non-real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment (net of unearned interest)	439,723	413,370
Oil and Gas [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment (net of unearned interest)	$ 482,786	$ 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 ($)	Jun. 30, 2022	Dec. 31, 2021
Receivables [Abstract]
Accrued interest receivable	$ 23,300,000	$ 21,000,000
Pay check protection program loan held for investment	3,200,000	80,400,000
Paycheck protection program unamortized processing fees	$ 0	$ 2,000,000

Loans Held for Investment and_5

Loans Held for Investment and Allowance for Credit Losses on Loans - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Financing Receivable Recorded Investment [Line Items]
Paycheck protection program amortized processing fees recognized as interest income	$ 400,000	$ 11,900,000	$ 2,100,000	$ 21,700,000
Gains (losses) on sale of property held in other real estate owned			3,800,000	(105,000)
Interest income recognized on nonaccrual loans			0	0
Nonaccrual loans with no related allowance for credit losses	0		0		$ 0
Interest income that would have been recognized			653,000	$ 1,200,000
U.S. Federal Agencies [Member]
Financing Receivable Recorded Investment [Line Items]
Nonaccrual loans guaranteed by government agencies			2,200,000		3,300,000
Other Real Estate Owned [Member] | Commercial Real Estate
Financing Receivable Recorded Investment [Line Items]
Other real estate	$ 29,700,000		$ 29,700,000		29,500,000
Previous Corporate Headquarters [Member] | Other Real Estate Owned [Member]
Financing Receivable Recorded Investment [Line Items]
Other real estate					$ 2,400,000
Parent Company [Member]
Financing Receivable Recorded Investment [Line Items]
Percentage of loans secured by real estate	65%		65%
BancFirst [Member]
Financing Receivable Recorded Investment [Line Items]
Loan percentage			83%
Pegasus and Worthington [Member]
Financing Receivable Recorded Investment [Line Items]
Loan percentage			17%

Loans Held for Investment and_6

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	Jun. 30, 2022	Dec. 31, 2021
Summary Of Nonperforming And Restructured Assets [Abstract]
Troubled debt restructurings	$ 2,174	$ 3,665
Other real estate owned and repossessed assets	$ 39,209	$ 39,553

Loans Held for Investment and_7

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	Jun. 30, 2022	Dec. 31, 2021
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total	$ 13,712	$ 20,892
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total	2,224	4,351
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total		407
Real Estate [Member] | Construction and Development Less than 60 Months [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total	101	80
Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total	103
Real Estate [Member] | Residential Real Estate First Lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total	2,537	2,763
Real Estate [Member] | Residential Real Estate All Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total	111	280
Real Estate [Member] | Farmland [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total	2,540	4,224
Commercial and Agricultural Non-Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total	5,998	7,569
Consumer Non-real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total	$ 98	148
Oil and Gas [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total		$ 1,070

Loans Held for Investment and_8

Loans Held for Investment and Allowance for Credit Losses on Loans - Age Analysis of Loans Held for Investments (Detail) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	$ 6,613,283	$ 6,169,442
Accruing Loans 90 Days or More Past Due	4,771	4,964
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	893,144	775,554
Accruing Loans 90 Days or More Past Due	374	18
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	1,162,912	1,095,324
Accruing Loans 90 Days or More Past Due	36
Real Estate [Member] | Construction and Development Less than 60 Months [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	436,658	415,466
Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	285,090	254,524
Real Estate [Member] | Residential Real Estate First Lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	1,072,564	937,006
Accruing Loans 90 Days or More Past Due	1,600	1,704
Real Estate [Member] | Residential Real Estate All Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	173,914	161,018
Accruing Loans 90 Days or More Past Due	618	431
Real Estate [Member] | Farmland [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	266,790	272,179
Accruing Loans 90 Days or More Past Due	1,052	139
Commercial and Agricultural Non-Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	1,399,702	1,416,093
Accruing Loans 90 Days or More Past Due	496	2,418
Consumer Non-real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	439,723	413,370
Accruing Loans 90 Days or More Past Due	512	254
Oil and Gas [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	482,786	428,908
Accruing Loans 90 Days or More Past Due	83
30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	15,971	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	1,578	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		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	2,890	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		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	3,688	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	644	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	600	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	4,029	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	2,542	1,873
60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	3,003	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	132	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	113
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	1,038	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	65	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	281	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	654	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	561	321
60 to 89 Days Past Due [Member] | Oil and Gas [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	159
90 Days and Greater [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	10,143	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	726	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	36
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	33
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	103
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	2,231	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	637	451
90 Days and Greater [Member] | Real Estate [Member] | Farmland [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	2,246	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	3,522	7,118
90 Days and Greater [Member] | Consumer Non-real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	526	272
90 Days and Greater [Member] | Oil and Gas [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	83
Past Due Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	29,117	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	2,436	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	36	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	3,036	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	103	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	6,957	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	1,346	774
Past Due Loans [Member] | Real Estate [Member] | Farmland [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	3,127	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	8,205	10,170
Past Due Loans [Member] | Consumer Non-real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	3,629	2,466
Past Due Loans [Member] | Oil and Gas [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	242
Current Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	6,584,166	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	890,708	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	1,162,876	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	433,622	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	284,987	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	1,065,607	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	172,568	160,244
Current Loans [Member] | Real Estate [Member] | Farmland [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	263,663	269,812
Current Loans [Member] | Commercial and Agricultural Non-Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	1,391,497	1,405,923
Current Loans [Member] | Consumer Non-real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	436,094	410,904
Current Loans [Member] | Oil and Gas [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	$ 482,544	$ 428,908

Loans Held for Investment and_9

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	Jun. 30, 2022	Dec. 31, 2021
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	$ 1,217,401
Fiscal year before current fiscal year	1,718,960
Two years before current fiscal year	892,016
Three years before current fiscal year	640,007
Four years before current fiscal year	320,149
Prior	740,053
Revolving Loans Amortized Cost Basis	1,084,697
Total Loans	6,613,283	$ 6,169,442
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	124,611
Fiscal year before current fiscal year	188,215
Two years before current fiscal year	152,400
Three years before current fiscal year	122,011
Four years before current fiscal year	60,524
Prior	173,838
Revolving Loans Amortized Cost Basis	71,545
Total Loans	893,144	775,554
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member] | Grade 1 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	98,837
Fiscal year before current fiscal year	153,898
Two years before current fiscal year	119,189
Three years before current fiscal year	98,981
Four years before current fiscal year	49,907
Prior	138,353
Revolving Loans Amortized Cost Basis	47,977
Total Loans	707,142
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member] | Grade 2 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	25,774
Fiscal year before current fiscal year	33,972
Two years before current fiscal year	32,759
Three years before current fiscal year	21,243
Four years before current fiscal year	10,083
Prior	33,359
Revolving Loans Amortized Cost Basis	23,049
Total Loans	180,239
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member] | Grade 3 [Member]
Financing Receivable Recorded Investment [Line Items]
Fiscal year before current fiscal year	42
Two years before current fiscal year	452
Three years before current fiscal year	936
Four years before current fiscal year	341
Prior	1,606
Revolving Loans Amortized Cost Basis	212
Total Loans	3,589
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member] | Grade 4 [Member]
Financing Receivable Recorded Investment [Line Items]
Fiscal year before current fiscal year	303
Three years before current fiscal year	851
Four years before current fiscal year	193
Prior	520
Revolving Loans Amortized Cost Basis	307
Total Loans	2,174
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	151,869
Fiscal year before current fiscal year	293,249
Two years before current fiscal year	229,779
Three years before current fiscal year	165,134
Four years before current fiscal year	71,456
Prior	193,346
Revolving Loans Amortized Cost Basis	58,079
Total Loans	1,162,912	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	86,546
Fiscal year before current fiscal year	238,973
Two years before current fiscal year	183,794
Three years before current fiscal year	112,077
Four years before current fiscal year	38,979
Prior	104,280
Revolving Loans Amortized Cost Basis	28,735
Total Loans	793,384
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member] | Grade 2 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	58,327
Fiscal year before current fiscal year	54,276
Two years before current fiscal year	45,985
Three years before current fiscal year	49,899
Four years before current fiscal year	32,181
Prior	86,252
Revolving Loans Amortized Cost Basis	29,344
Total Loans	356,264
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member] | Grade 3 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	6,996
Three years before current fiscal year	3,158
Four years before current fiscal year	93
Prior	2,814
Total Loans	13,061
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member] | Grade 4 [Member]
Financing Receivable Recorded Investment [Line Items]
Four years before current fiscal year	203
Total Loans	203
Real Estate [Member] | Construction and Development Less than 60 Months [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	79,463
Fiscal year before current fiscal year	164,309
Two years before current fiscal year	44,049
Three years before current fiscal year	52,701
Four years before current fiscal year	5,362
Prior	7,181
Revolving Loans Amortized Cost Basis	83,593
Total Loans	436,658	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	60,042
Fiscal year before current fiscal year	136,104
Two years before current fiscal year	42,114
Three years before current fiscal year	37,833
Four years before current fiscal year	3,629
Prior	5,887
Revolving Loans Amortized Cost Basis	40,046
Total Loans	325,655
Real Estate [Member] | Construction and Development Less than 60 Months [Member] | Grade 2 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	18,223
Fiscal year before current fiscal year	28,205
Two years before current fiscal year	1,799
Three years before current fiscal year	14,816
Four years before current fiscal year	1,733
Prior	1,277
Revolving Loans Amortized Cost Basis	43,436
Total Loans	109,489
Real Estate [Member] | Construction and Development Less than 60 Months [Member] | Grade 3 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	1,198
Two years before current fiscal year	103
Prior	2
Revolving Loans Amortized Cost Basis	111
Total Loans	1,414
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
Three years before current fiscal year	52
Prior	15
Total Loans	100
Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	138,105
Fiscal year before current fiscal year	108,648
Two years before current fiscal year	4,168
Three years before current fiscal year	26
Prior	457
Revolving Loans Amortized Cost Basis	33,686
Total Loans	285,090	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	119,503
Fiscal year before current fiscal year	94,469
Two years before current fiscal year	3,821
Three years before current fiscal year	26
Prior	44
Revolving Loans Amortized Cost Basis	31,831
Total Loans	249,694
Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member] | Grade 2 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	18,089
Fiscal year before current fiscal year	14,076
Two years before current fiscal year	347
Prior	413
Revolving Loans Amortized Cost Basis	1,855
Total Loans	34,780
Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member] | Grade 3 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	513
Total Loans	513
Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member] | Grade 4 [Member]
Financing Receivable Recorded Investment [Line Items]
Fiscal year before current fiscal year	103
Total Loans	103
Real Estate [Member] | Residential Real Estate First Lien [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	206,518
Fiscal year before current fiscal year	274,984
Two years before current fiscal year	189,539
Three years before current fiscal year	110,969
Four years before current fiscal year	76,280
Prior	207,878
Revolving Loans Amortized Cost Basis	6,396
Total Loans	1,072,564	937,006
Real Estate [Member] | Residential Real Estate First Lien [Member] | Grade 1 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	181,536
Fiscal year before current fiscal year	234,262
Two years before current fiscal year	162,322
Three years before current fiscal year	94,607
Four years before current fiscal year	61,203
Prior	157,490
Revolving Loans Amortized Cost Basis	6,396
Total Loans	897,816
Real Estate [Member] | Residential Real Estate First Lien [Member] | Grade 2 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	23,461
Fiscal year before current fiscal year	39,031
Two years before current fiscal year	25,983
Three years before current fiscal year	14,136
Four years before current fiscal year	12,264
Prior	44,323
Total Loans	159,198
Real Estate [Member] | Residential Real Estate First Lien [Member] | Grade 3 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	1,521
Fiscal year before current fiscal year	1,492
Two years before current fiscal year	1,050
Three years before current fiscal year	1,701
Four years before current fiscal year	1,826
Prior	3,800
Total Loans	11,390
Real Estate [Member] | Residential Real Estate First Lien [Member] | Grade 4 [Member]
Financing Receivable Recorded Investment [Line Items]
Fiscal year before current fiscal year	199
Two years before current fiscal year	184
Three years before current fiscal year	525
Four years before current fiscal year	987
Prior	2,265
Total Loans	4,160
Real Estate [Member] | Residential Real Estate All Other [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	19,083
Fiscal year before current fiscal year	15,112
Two years before current fiscal year	14,974
Three years before current fiscal year	8,664
Four years before current fiscal year	5,830
Prior	16,959
Revolving Loans Amortized Cost Basis	93,292
Total Loans	173,914	161,018
Real Estate [Member] | Residential Real Estate All Other [Member] | Grade 1 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	16,908
Fiscal year before current fiscal year	13,021
Two years before current fiscal year	12,762
Three years before current fiscal year	6,836
Four years before current fiscal year	4,343
Prior	13,031
Revolving Loans Amortized Cost Basis	33,925
Total Loans	100,826
Real Estate [Member] | Residential Real Estate All Other [Member] | Grade 2 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	1,990
Fiscal year before current fiscal year	1,849
Two years before current fiscal year	1,944
Three years before current fiscal year	1,761
Four years before current fiscal year	1,206
Prior	2,820
Revolving Loans Amortized Cost Basis	58,388
Total Loans	69,958
Real Estate [Member] | Residential Real Estate All Other [Member] | Grade 3 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	185
Fiscal year before current fiscal year	211
Two years before current fiscal year	91
Three years before current fiscal year	67
Four years before current fiscal year	243
Prior	890
Revolving Loans Amortized Cost Basis	589
Total Loans	2,276
Real Estate [Member] | Residential Real Estate All Other [Member] | Grade 4 [Member]
Financing Receivable Recorded Investment [Line Items]
Fiscal year before current fiscal year	31
Two years before current fiscal year	177
Four years before current fiscal year	38
Prior	218
Revolving Loans Amortized Cost Basis	390
Total Loans	854
Real Estate [Member] | Farmland [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	37,256
Fiscal year before current fiscal year	60,161
Two years before current fiscal year	42,658
Three years before current fiscal year	36,293
Four years before current fiscal year	17,213
Prior	52,231
Revolving Loans Amortized Cost Basis	20,978
Total Loans	266,790	272,179
Real Estate [Member] | Farmland [Member] | Grade 1 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	26,555
Fiscal year before current fiscal year	40,429
Two years before current fiscal year	32,947
Three years before current fiscal year	21,399
Four years before current fiscal year	11,001
Prior	32,232
Revolving Loans Amortized Cost Basis	6,702
Total Loans	171,265
Real Estate [Member] | Farmland [Member] | Grade 2 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	8,434
Fiscal year before current fiscal year	16,653
Two years before current fiscal year	7,470
Three years before current fiscal year	13,116
Four years before current fiscal year	6,084
Prior	17,368
Revolving Loans Amortized Cost Basis	12,121
Total Loans	81,246
Real Estate [Member] | Farmland [Member] | Grade 3 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	2,267
Fiscal year before current fiscal year	1,954
Two years before current fiscal year	1,862
Three years before current fiscal year	1,778
Four years before current fiscal year	70
Prior	2,409
Revolving Loans Amortized Cost Basis	1,923
Total Loans	12,263
Real Estate [Member] | Farmland [Member] | Grade 4 [Member]
Financing Receivable Recorded Investment [Line Items]
Fiscal year before current fiscal year	1,125
Two years before current fiscal year	379
Four years before current fiscal year	58
Prior	222
Revolving Loans Amortized Cost Basis	232
Total Loans	2,016
Commercial and Agricultural Non-Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	209,815
Fiscal year before current fiscal year	344,327
Two years before current fiscal year	131,116
Three years before current fiscal year	90,926
Four years before current fiscal year	51,494
Prior	81,278
Revolving Loans Amortized Cost Basis	490,746
Total Loans	1,399,702	1,416,093
Commercial and Agricultural Non-Real Estate [Member] | Grade 1 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	160,548
Fiscal year before current fiscal year	271,247
Two years before current fiscal year	100,081
Three years before current fiscal year	71,623
Four years before current fiscal year	22,808
Prior	71,498
Revolving Loans Amortized Cost Basis	337,631
Total Loans	1,035,436
Commercial and Agricultural Non-Real Estate [Member] | Grade 2 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	46,899
Fiscal year before current fiscal year	69,950
Two years before current fiscal year	28,657
Three years before current fiscal year	17,177
Four years before current fiscal year	26,250
Prior	7,737
Revolving Loans Amortized Cost Basis	145,827
Total Loans	342,497
Commercial and Agricultural Non-Real Estate [Member] | Grade 3 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	2,368
Fiscal year before current fiscal year	2,451
Two years before current fiscal year	2,144
Three years before current fiscal year	1,219
Four years before current fiscal year	1,937
Prior	806
Revolving Loans Amortized Cost Basis	7,019
Total Loans	17,944
Commercial and Agricultural Non-Real Estate [Member] | Grade 4 [Member]
Financing Receivable Recorded Investment [Line Items]
Fiscal year before current fiscal year	679
Two years before current fiscal year	234
Three years before current fiscal year	907
Four years before current fiscal year	499
Prior	1,237
Revolving Loans Amortized Cost Basis	269
Total Loans	3,825
Consumer Non-real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	126,315
Fiscal year before current fiscal year	156,861
Two years before current fiscal year	61,604
Three years before current fiscal year	35,234
Four years before current fiscal year	12,415
Prior	6,110
Revolving Loans Amortized Cost Basis	41,184
Total Loans	439,723	413,370
Consumer Non-real Estate [Member] | Grade 1 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	112,598
Fiscal year before current fiscal year	141,806
Two years before current fiscal year	55,814
Three years before current fiscal year	30,229
Four years before current fiscal year	10,829
Prior	3,970
Revolving Loans Amortized Cost Basis	35,949
Total Loans	391,195
Consumer Non-real Estate [Member] | Grade 2 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	13,357
Fiscal year before current fiscal year	14,002
Two years before current fiscal year	5,298
Three years before current fiscal year	4,529
Four years before current fiscal year	1,395
Prior	2,042
Revolving Loans Amortized Cost Basis	5,233
Total Loans	45,856
Consumer Non-real Estate [Member] | Grade 3 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	296
Fiscal year before current fiscal year	767
Two years before current fiscal year	405
Three years before current fiscal year	294
Four years before current fiscal year	127
Prior	97
Revolving Loans Amortized Cost Basis	2
Total Loans	1,988
Consumer Non-real Estate [Member] | Grade 4 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	64
Fiscal year before current fiscal year	286
Two years before current fiscal year	87
Three years before current fiscal year	182
Four years before current fiscal year	64
Prior	1
Total Loans	684
Oil and Gas [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	124,366
Fiscal year before current fiscal year	113,094
Two years before current fiscal year	21,729
Three years before current fiscal year	18,049
Four years before current fiscal year	19,575
Prior	775
Revolving Loans Amortized Cost Basis	185,198
Total Loans	482,786	$ 428,908
Oil and Gas [Member] | Grade 1 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	115,020
Fiscal year before current fiscal year	101,947
Two years before current fiscal year	18,040
Three years before current fiscal year	4,468
Four years before current fiscal year	1,798
Prior	326
Revolving Loans Amortized Cost Basis	152,151
Total Loans	393,750
Oil and Gas [Member] | Grade 2 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	9,301
Fiscal year before current fiscal year	5,414
Two years before current fiscal year	3,681
Three years before current fiscal year	13,581
Four years before current fiscal year	17,777
Prior	250
Revolving Loans Amortized Cost Basis	30,898
Total Loans	80,902
Oil and Gas [Member] | Grade 3 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	45
Fiscal year before current fiscal year	4,733
Two years before current fiscal year	8
Prior	199
Revolving Loans Amortized Cost Basis	2,080
Total Loans	7,065
Oil and Gas [Member] | Grade 4 [Member]
Financing Receivable Recorded Investment [Line Items]
Fiscal year before current fiscal year	1,000
Revolving Loans Amortized Cost Basis	69
Total Loans	$ 1,069

Loans Held for Investment an_10

Loans Held for Investment and Allowance for Credit Losses on Loans - Activity in Allowance for Credit Losses on Loans (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	$ 87,239	$ 90,860	$ 83,936	$ 91,366
Initial allowance on loans purchased with credit deterioration		7,272	78	7,272
Charge- offs	(915)	(4,448)	(1,237)	(5,114)
Recoveries	110	228	721	388
Net charge-offs	(805)	(4,220)	(516)	(4,726)
Provision for (benefit from) credit losses	501	(9,949)	3,437	(9,949)
Balance at end of period	86,935	83,963	86,935	83,963
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	8,281	6,505	7,568	8,470
Initial allowance on loans purchased with credit deterioration		987		987
Charge- offs	(4)		(20)
Recoveries	30	1	78	1
Net charge-offs	26	1	58	1
Provision for (benefit from) credit losses	(1,362)	805	(681)	(1,160)
Balance at end of period	6,945	8,298	6,945	8,298
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	20,674	19,115	16,987	12,318
Initial allowance on loans purchased with credit deterioration		633		633
Charge- offs		(758)		(796)
Net charge-offs		(758)		(796)
Provision for (benefit from) credit losses	2,263	(3,952)	5,950	2,883
Balance at end of period	22,937	15,038	22,937	15,038
Real Estate [Member] | Construction and Development Less than 60 Months [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	3,309	2,943	3,490	2,723
Initial allowance on loans purchased with credit deterioration		173		173
Recoveries	2	2	5	5
Net charge-offs	2	2	5	5
Provision for (benefit from) credit losses	417	(23)	233	194
Balance at end of period	3,728	3,095	3,728	3,095
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	2,164	1,092	1,092	726
Provision for (benefit from) credit losses	128	(94)	1,200	272
Balance at end of period	2,292	998	2,292	998
Real Estate [Member] | Residential Real Estate First Lien [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	3,421	2,937	3,076	2,822
Initial allowance on loans purchased with credit deterioration		117	2	117
Charge- offs	(5)	(9)	(49)	(52)
Recoveries	6	12	13	27
Net charge-offs	1	3	(36)	(25)
Provision for (benefit from) credit losses	(39)	(136)	341	7
Balance at end of period	3,383	2,921	3,383	2,921
Real Estate [Member] | Residential Real Estate All Other [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	2,107	1,880	2,104	2,236
Charge- offs	(36)	(30)	(36)	(46)
Recoveries		1	402	4
Net charge-offs	(36)	(29)	366	(42)
Provision for (benefit from) credit losses	(20)	112	(419)	(231)
Balance at end of period	2,051	1,963	2,051	1,963
Commercial and Agricultural Non-Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	27,724	35,439	28,085	34,643
Initial allowance on loans purchased with credit deterioration		4,711	48	4,711
Charge- offs	(717)	(3,442)	(899)	(3,598)
Recoveries	30	125	143	152
Net charge-offs	(687)	(3,317)	(756)	(3,446)
Provision for (benefit from) credit losses	796	(2,523)	456	(1,598)
Balance at end of period	27,833	34,310	27,833	34,310
Consumer Non-real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	3,771	3,421	3,734	3,542
Initial allowance on loans purchased with credit deterioration		8	28	8
Charge- offs	(153)	(209)	(233)	(622)
Recoveries	42	86	80	198
Net charge-offs	(111)	(123)	(153)	(424)
Provision for (benefit from) credit losses	434	175	485	355
Balance at end of period	4,094	3,481	4,094	3,481
Oil and Gas [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	11,405	14,440	12,978	20,733
Provision for (benefit from) credit losses	(2,098)	(4,308)	(3,671)	(10,601)
Balance at end of period	9,307	10,132	9,307	10,132
Farmland [Member] | Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	4,383	3,088	4,822	3,153
Initial allowance on loans purchased with credit deterioration		643		643
Recoveries		1		1
Net charge-offs		1		1
Provision for (benefit from) credit losses	(18)	(5)	(457)	(70)
Balance at end of period	$ 4,365	$ 3,727	$ 4,365	$ 3,727

Loans Held for Investment an_11

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	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Financing Receivable Allowance For Credit Losses [Line Items]
Purchase price of loans at acquisition	$ 661	$ 26,779
Allowance for credit losses at acquisition	78	7,272
Par value of acquired loans at acquisition	$ 739	$ 34,051

Loans Held for Investment an_12

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	Jun. 30, 2022	Dec. 31, 2021
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	$ 19,750	$ 24,857
Real Estate Asset [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	9,926	13,129
Business Assets [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	4,441	6,472
Other Assets [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	5,383	5,256
Specific Allocation [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	5,920	7,923
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	1,671	1,952
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	1,146	1,404
Real Estate [Member] | Residential Real Estate First Lien [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	734	871
Real Estate [Member] | Residential Real Estate All Other [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	34	199
Real Estate [Member] | Farmland [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	6,341	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	1,671	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	1,146	1,404
Real Estate [Member] | Real Estate Asset [Member] | Residential Real Estate First Lien [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	734	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	34	199
Real Estate [Member] | Real Estate Asset [Member] | Farmland [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	6,341	8,703
Real Estate [Member] | Specific Allocation [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	555	576
Real Estate [Member] | Specific Allocation [Member] | Commercial Real Estate Non-Owner Occupied [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	214	263
Real Estate [Member] | Specific Allocation [Member] | Residential Real Estate First Lien [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	107	143
Real Estate [Member] | Specific Allocation [Member] | Residential Real Estate All Other [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	15	178
Real Estate [Member] | Specific Allocation [Member] | Farmland [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	1,157	1,805
Commercial and Agricultural Non-Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	9,785	11,674
Commercial and Agricultural Non-Real Estate [Member] | Business Assets [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	4,441	6,472
Commercial and Agricultural Non-Real Estate [Member] | Other Assets [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	5,344	5,202
Commercial and Agricultural Non-Real Estate [Member] | Specific Allocation [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	3,837	4,938
Consumer Non-real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	39	54
Consumer Non-real Estate [Member] | Other Assets [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	39	54
Consumer Non-real Estate [Member] | Specific Allocation [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	$ 35	$ 20

Loans Held for Investment an_13

Loans Held for Investment and Allowance for Credit Losses on Loans - Transfers from Loans and Premises and Equipment to Other Real Estate Owned and Repossessed Assets (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Noncash Investing and Financing Items [Abstract]
Other real estate owned	$ 4,065	$ 9,438
Repossessed assets	503	427
Total	$ 4,568	$ 9,865

Intangible Assets and Goodwil_2

Intangible Assets and Goodwill - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 36,648	$ 30,783
Accumulated Amortization	(14,905)	(13,217)
Net Carrying Amount	21,743	17,566
Core Deposit Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	33,298	27,433
Accumulated Amortization	(11,914)	(10,311)
Net Carrying Amount	21,384	17,122
Customer Relationship Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	3,350	3,350
Accumulated Amortization	(2,991)	(2,906)
Net Carrying Amount	$ 359	$ 444

Intangible Assets and Goodwil_3

Intangible Assets and Goodwill - Summary of Goodwill by Business Segment (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2022 USD ($)
Goodwill [Line Items]
Balance at beginning of period	$ 149,922
Acquisitions	33,717
Balance at end of period	183,639
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	33,717
Balance at end of period	33,717
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

Leases - Schedule of Rent Expen

Leases - Schedule of Rent Expenses of Operating Leases (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Leases [Abstract]
Rent expense	$ 491	$ 463	$ 916	$ 966

Leases - Additional Information

Leases - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Leases [Abstract]
Right of use lease asset	$ 5,300		$ 5,300
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	$ 5,166		$ 5,166
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 4 months 24 days		3 years 4 months 24 days
Operating lease weighted-average discount rate	2.30%		2.30%
Operating lease revenue	$ 1,400	$ 1,300	$ 2,700	$ 2,700

Leases - Schedule of Minimum Fu

Leases - Schedule of Minimum Future Commitments of Operating Leases (Detail) $ in Thousands	Jun. 30, 2022 USD ($)
Leases [Abstract]
2022 (six months)	$ 929
2023	1,565
2024	1,205
2025	989
2026	647
Thereafter	1,314
Total lease payments	6,649
Less imputed Interest	(1,483)
Operating lease liability	$ 5,166

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	Jun. 30, 2022 USD ($)
Leases [Abstract]
2022 (six months)	$ 1,872
2023	3,043
2024	2,918
2025	2,213
2026	1,847
2027-2031	3,559
Total future minimum lease payments	$ 15,452

Subordinated Debt - Additional

Subordinated Debt - Additional Information (Detail) - USD ($)		1 Months Ended		6 Months Ended
	Jun. 17, 2021	Mar. 31, 2004	Feb. 29, 2004	Jun. 30, 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]
Junior subordinated notes assumed				$ 26,800,000
Interest rate of securities				7.20%
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%

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Cash settlement for stock options, number of shares		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	133,500
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	65,000
Stock option plan termination date	Dec. 31, 2024
Option exercisable rate	25%
Option exercisable period	1 year
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	29,879
Number of shares of common stock distributed	13,288	2,161

Stock-Based Compensation - Summ

Stock-Based Compensation - Summary of Activity Under Stock Option Plan (Detail) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2022 USD ($) $ / shares shares
Share-based Payment Arrangement [Abstract]
Outstanding at beginning period - Options | shares	1,303,250
Options granted | shares	135,000
Options exercised | shares	(164,792)
Options canceled, forfeited, or expired | shares	(5,000)
Outstanding at ending period - Options | shares	1,268,458
Exercisable at ending period - Options | shares	516,458
Outstanding at beginning period - Wgtd. Avg. Exercise Price | $ / shares	$ 40.90
Options granted - Wgtd. Avg. Exercise Price | $ / shares	81.90
Options exercised - Wgtd. Avg. Exercise Price | $ / shares	26.05
Options cancelled, forfeited, or expired - Wgtd. Avg. Exercise Price | $ / shares	74.90
Outstanding at ending period - Wgtd. Avg. Exercise Price | $ / shares	47.06
Exercisable at ending period - Wgtd. Avg. Exercise Price | $ / shares	$ 29.79
Outstanding at ending period - Wgtd. Avg. Remaining Contractual Term, years	8 years 3 months 25 days
Exercisable at ending period - Wgtd. Avg. Remaining Contractual Term, years	7 years 21 days
Outstanding at ending period - Aggregate Intrinsic Value | $	$ 61,713
Exercisable at ending period - Aggregate Intrinsic Value | $	$ 34,043

Stock-Based Compensation - Opti

Stock-Based Compensation - Options Exercised Under Stock Option Plan (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Total intrinsic value of options exercised	$ 2,979	$ 557	$ 8,943	$ 7,860
Cash received from options exercised	1,303	413	4,292	4,379
Tax benefit realized from options exercised	$ 716	$ 142	$ 2,150	$ 2,002

Stock-Based Compensation - Stoc

Stock-Based Compensation - Stock-Based Employee Compensation Expense (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement Compensation Expense Items [Abstract]
Stock-based compensation expense	$ 460	$ 473	$ 918	$ 1,049
Tax benefit	111	114	221	252
Stock-based compensation expense, net of tax	$ 349	$ 359	$ 697	$ 797

Stock-Based Compensation - Unea

Stock-Based Compensation - Unearned Stock-based Compensation Expense (Detail) $ in Thousands	Jun. 30, 2022 USD ($)
Share-based Payment Arrangement, Noncash Expense [Abstract]
Unearned stock-based compensation expense	$ 9,981

Stock-Based Compensation - Assu

Stock-Based Compensation - Assumptions Used for Computing Stock-Based Compensation Expense (Detail) - $ / shares	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
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	$ 29.08	$ 23.74
Risk-free interest rate, minimum	1.75%	1.34%
Risk-free interest rate, maximum	3.25%	1.74%
Dividend yield	2%	2%
Stock price volatility, minimum	34.61%	35.55%
Stock price volatility, maximum	34.71%	36.01%
Expected term	10 years	10 years

Stock-Based Compensation - Su_2

Stock-Based Compensation - Summary of Accumulated Stock Units (Detail) - $ / shares	Jun. 30, 2022	Dec. 31, 2021
Share-based Payment Arrangement [Abstract]
Accumulated stock units	143,712	152,754
Average price	$ 32.79	$ 30.86

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail) - USD ($)	1 Months Ended
	Sep. 30, 2021	Jun. 30, 2022	Jun. 17, 2021
Stockholders Equity [Line Items]
Additional shares to repurchase	650,000
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%
Maximum [Member]
Stockholders Equity [Line Items]
Quantitative limit for trust preferred securities to be included in tier 1 capital		$ 15,000,000,000

Stockholders' Equity - Summary

Stockholders' Equity - Summary of Shares Repurchased Under Stock Purchase Program (Detail) - shares	Jun. 30, 2022	Jun. 30, 2021
Summary Of Shares Repurchased Under Stock Purchase Program [Abstract]
Shares remaining to be repurchased	500,486	62,782

Stockholders' Equity - Required

Stockholders' Equity - Required Capital Amounts and Company's Respective Ratios (Detail) $ in Thousands	Jun. 30, 2022 USD ($)
Parent Company [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital Amount	$ 1,198,933
Total Capital To Risk Weighted Assets Actual Ratio	16.02
Capital Required For Capital Adequacy Amount	$ 599,086
Capital Required For Capital Adequacy to Risk Weighted Assets Ratio	8
Capital With Capital Conservation Buffer Amount	$ 786,300
Capital With Capital Conservation To Risk Based Weighted Assets Buffer Ratio	10.50
Common Equity Tier 1 Risk Based Capital Amount	$ 1,026,801
Common Equity Tier 1 Risk Based Capital To Risk Weighted Assets Ratio	13.72
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy Amount	$ 336,986
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio	4.50
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer Amount	$ 524,200
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio	7
Tier 1 Risk Based Capital Amount	$ 1,052,801
Tier 1 Risk Based Capital To Risk Weighted Assets Ratio	14.07
Tier 1 Risk Based Capital Required For Capital Adequacy Amount	$ 449,314
Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio	6
Tier 1 Risk Based Capital With Capital Conservation Buffer Amount	$ 636,529
Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio	8.50
Tier 1 Capital Amount	$ 1,052,801
Tier 1 Capital To Average Assets Ratio	8.47
Tier 1 Capital Required For Capital Adequacy Amount	$ 497,366
Tier 1 Capital Required For Capital Adequacy To Average Assets Ratio	4
BancFirst [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital Amount	$ 1,036,057
Total Capital To Risk Weighted Assets Actual Ratio	16.41
Capital Required For Capital Adequacy Amount	$ 504,967
Capital Required For Capital Adequacy to Risk Weighted Assets Ratio	8
Capital With Capital Conservation Buffer Amount	$ 662,769
Capital With Capital Conservation To Risk Based Weighted Assets Buffer Ratio	10.50
Capital Required To Be Well Capitalized Amount	$ 631,209
Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio	10
Common Equity Tier 1 Risk Based Capital Amount	$ 939,308
Common Equity Tier 1 Risk Based Capital To Risk Weighted Assets Ratio	14.88
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy Amount	$ 284,044
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio	4.50
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer Amount	$ 441,846
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio	7
Common Equity Tier 1 Risk Based Capital Required To Be Well Capitalized Amount	$ 410,286
Common Equity Tier 1 Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio	6.50
Tier 1 Risk Based Capital Amount	$ 959,308
Tier 1 Risk Based Capital To Risk Weighted Assets Ratio	15.20
Tier 1 Risk Based Capital Required For Capital Adequacy Amount	$ 378,725
Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio	6
Tier 1 Risk Based Capital With Capital Conservation Buffer Amount	$ 536,527
Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio	8.50
Tier 1 Risk Based Capital Required To Be Well Capitalized Amount	$ 504,967
Tier 1 Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio	8
Tier 1 Capital Amount	$ 959,308
Tier 1 Capital To Average Assets Ratio	9.10
Tier 1 Capital Required For Capital Adequacy Amount	$ 421,682
Tier 1 Capital Required For Capital Adequacy To Average Assets Ratio	4
Tier 1 Capital Required To Be Well Capitalized Amount	$ 527,102
Tier 1 Capital Required To Be Well Capitalized To Average Assets Ratio	5
Pegasus [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital Amount	$ 101,936
Total Capital To Risk Weighted Assets Actual Ratio	11.68
Capital Required For Capital Adequacy Amount	$ 69,794
Capital Required For Capital Adequacy to Risk Weighted Assets Ratio	8
Capital With Capital Conservation Buffer Amount	$ 91,605
Capital With Capital Conservation To Risk Based Weighted Assets Buffer Ratio	10.50
Capital Required To Be Well Capitalized Amount	$ 87,243
Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio	10
Common Equity Tier 1 Risk Based Capital Amount	$ 94,663
Common Equity Tier 1 Risk Based Capital To Risk Weighted Assets Ratio	10.85
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy Amount	$ 39,259
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio	4.50
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer Amount	$ 61,070
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio	7
Common Equity Tier 1 Risk Based Capital Required To Be Well Capitalized Amount	$ 56,708
Common Equity Tier 1 Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio	6.50
Tier 1 Risk Based Capital Amount	$ 94,663
Tier 1 Risk Based Capital To Risk Weighted Assets Ratio	10.85
Tier 1 Risk Based Capital Required For Capital Adequacy Amount	$ 52,346
Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio	6
Tier 1 Risk Based Capital With Capital Conservation Buffer Amount	$ 74,157
Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio	8.50
Tier 1 Risk Based Capital Required To Be Well Capitalized Amount	$ 69,794
Tier 1 Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio	8
Tier 1 Capital Amount	$ 94,663
Tier 1 Capital To Average Assets Ratio	7.04
Tier 1 Capital Required For Capital Adequacy Amount	$ 53,773
Tier 1 Capital Required For Capital Adequacy To Average Assets Ratio	4
Tier 1 Capital Required To Be Well Capitalized Amount	$ 67,216
Tier 1 Capital Required To Be Well Capitalized To Average Assets Ratio	5
Worthington [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital Amount	$ 43,784
Total Capital To Risk Weighted Assets Actual Ratio	15.14
Capital Required For Capital Adequacy Amount	$ 23,138
Capital Required For Capital Adequacy to Risk Weighted Assets Ratio	8
Capital With Capital Conservation Buffer Amount	$ 30,369
Capital With Capital Conservation To Risk Based Weighted Assets Buffer Ratio	10.50
Capital Required To Be Well Capitalized Amount	$ 28,923
Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio	10
Common Equity Tier 1 Risk Based Capital Amount	$ 40,248
Common Equity Tier 1 Risk Based Capital To Risk Weighted Assets Ratio	13.92
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy Amount	$ 13,015
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio	4.50
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer Amount	$ 20,246
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio	7
Common Equity Tier 1 Risk Based Capital Required To Be Well Capitalized Amount	$ 18,800
Common Equity Tier 1 Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio	6.50
Tier 1 Risk Based Capital Amount	$ 40,248
Tier 1 Risk Based Capital To Risk Weighted Assets Ratio	13.92
Tier 1 Risk Based Capital Required For Capital Adequacy Amount	$ 17,354
Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio	6
Tier 1 Risk Based Capital With Capital Conservation Buffer Amount	$ 24,584
Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio	8.50
Tier 1 Risk Based Capital Required To Be Well Capitalized Amount	$ 23,138
Tier 1 Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio	8
Tier 1 Capital Amount	$ 40,248
Tier 1 Capital To Average Assets Ratio	8
Tier 1 Capital Required For Capital Adequacy Amount	$ 20,129
Tier 1 Capital Required For Capital Adequacy To Average Assets Ratio	4
Tier 1 Capital Required To Be Well Capitalized Amount	$ 25,162
Tier 1 Capital Required To Be Well Capitalized To Average Assets Ratio	5

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	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share Reconciliation [Abstract]
Income available to common stockholders	$ 44,707	$ 48,192	$ 80,622	$ 90,712
Income available to common stockholders plus assumed exercises of stock options	$ 44,707	$ 48,192	$ 80,622	$ 90,712
Income available to common stockholders - Shares	32,749,752	32,779,227	32,708,563	32,768,102
Dilutive effect of stock options - Shares	668,730	626,696	658,236	639,591
Income available to common stockholders plus assumed exercises of stock options - Shares	33,418,482	33,405,923	33,366,799	33,407,693
Income available to common stockholders - Per Share Amount	$ 1.36	$ 1.47	$ 2.46	$ 2.77
Income available to common stockholders plus assumed exercises of stock options - Per Share Amount	$ 1.34	$ 1.45	$ 2.42	$ 2.72

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	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Abstract]
Shares	122,489	43,093	131,779	108,055

Fair Value Measurements - Fair

Fair Value Measurements - Fair Value of Financial Assets and Liabilities Measured on Recurring Basis (Detail) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	$ 1,203,503	$ 531,523
Derivative assets	55,174	8,946
Derivative liabilities	53,943	8,237
U.S. Treasury [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	1,146,858	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	18,871	21,942
Mortgage Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	17,289	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	4,876	6,319
Asset backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	12,877	13,357
Other Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	2,732	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	1,146,858	457,628
Level 2 Inputs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	55,174	8,946
Derivative liabilities	53,943	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	18,871	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	17,289	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	4,666	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	12,877	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	2,732	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	$ 210	$ 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	6 Months Ended	12 Months Ended
	Jun. 30, 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		240
Settlements	(110)	(75)
Balance at the end of the period	$ 210	$ 320

Fair Value Measurements - Asset

Fair Value Measurements - Assets Measured at Fair Value on Nonrecurring Basis (Detail) - Level 3 [Member] - Nonrecurring [Member] - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Equity Securities [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total Fair Value	$ 10,249	$ 10,590
Collateral Dependent Loans
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total Fair Value	525	13,195
Repossessed Assets [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total Fair Value	110	78
Other Real Estate Owned [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total Fair Value	$ 2,300	$ 7,496

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Detail) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 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 - Estim

Fair Value Measurements - Estimated Fair Values of Company's Financial Instruments (Detail) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
FINANCIAL ASSETS
Federal funds sold, Carrying Amount	$ 1,525	$ 800
Debt securities held for investment, Carrying Amount	2,391	2,977
Loans, net of allowance for credit losses, Carrying Amount	6,526,348	6,085,506
Debt securities held for investment, Fair Value	2,392	2,978
Loans held for sale, Fair Value	7,360	24,776
FINANCIAL LIABILITIES
Deposits, Carrying Amount	11,142,688	8,091,914
Short-term borrowings, Carrying Amount	6,100	0
Subordinated debt, Carrying Amount	86,015	85,987
OFF-BALANCE SHEET FINANCIAL INSTRUMENTS
Loan commitments, Fair Value	4,350	3,648
Letters of credit, Fair Value	509	621
Level 2 Inputs [Member]
FINANCIAL ASSETS
Cash and cash equivalents, Carrying Amount	3,879,341	2,050,022
Federal funds sold, Carrying Amount	1,525	800
Debt securities held for investment, Carrying Amount	21	32
Loans held for sale, Carrying Amount	7,360	24,776
Cash and cash equivalents, Fair Value	3,879,341	2,050,022
Federal funds sold, Fair Value	1,525	800
Debt securities held for investment, Fair Value	22	33
Loans held for sale, Fair Value	7,360	24,776
FINANCIAL LIABILITIES
Deposits, Carrying Amount	11,142,688	8,091,914
Short-term borrowings, Carrying Amount	6,100
Subordinated debt, Carrying Amount	86,015	85,987
Deposits, Fair Value	10,825,618	8,161,553
Short-term Debt, Fair Value	6,100
Subordinated debt, Fair Value	85,100	90,391
Level 3 Inputs [Member]
FINANCIAL ASSETS
Debt securities held for investment, Carrying Amount	2,370	2,945
Loans, net of allowance for credit losses, Carrying Amount	6,526,348	6,085,506
Debt securities held for investment, Fair Value	2,370	2,945
Loans, net of allowance for credit losses, Fair Value	$ 6,296,415	$ 6,059,716

Segment Information - Additiona

Segment Information - Additional Information (Detail)	6 Months Ended
	Jun. 30, 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	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Segment Reporting Information [Line Items]
Net interest income	$ 86,867	$ 82,363	$ 162,374	$ 159,569
Noninterest income	42,598	44,618	86,248	84,553
Income before taxes	55,247	62,907	98,956	115,085
Total assets	12,530,073		12,530,073		$ 9,405,612
Operating Segments [Member] | Metropolitan Banks [Member]
Segment Reporting Information [Line Items]
Net interest income	21,962	19,848	41,570	39,181
Noninterest income	5,504	3,669	15,277	8,813
Income before taxes	15,142	17,602	33,313	31,526
Total assets	3,430,347		3,430,347		2,627,874
Operating Segments [Member] | Community Banks [Member]
Segment Reporting Information [Line Items]
Net interest income	49,615	45,024	94,183	87,794
Noninterest income	18,152	16,197	34,997	31,173
Income before taxes	36,462	36,514	67,801	66,283
Total assets	6,899,994		6,899,994		5,821,220
Operating Segments [Member] | Pegasus [Member]
Segment Reporting Information [Line Items]
Net interest income	9,964	5,808	17,584	11,167
Noninterest income	293	355	484	739
Income before taxes	4,672	1,947	7,499	3,592
Total assets	1,424,086		1,424,086		1,045,699
Operating Segments [Member] | Worthington [Member]
Segment Reporting Information [Line Items]
Net interest income	3,743		5,437
Noninterest income	286		419
Income before taxes	1,436		1,821
Total assets	540,608		540,608
Operating Segments [Member] | Other Financial Services [Member]
Segment Reporting Information [Line Items]
Net interest income	2,079	11,457	4,992	21,339
Noninterest income	10,753	10,913	23,736	22,488
Income before taxes	4,643	5,220	10,688	11,171
Total assets	108,723		108,723		71,694
Operating Segments [Member] | Executive, Operations & Support [Member]
Segment Reporting Information [Line Items]
Net interest income	(505)	9	(1,412)	(398)
Noninterest income	52,756	62,025	95,330	111,756
Income before taxes	37,901	49,790	61,549	92,130
Total assets	1,574,991		1,574,991		1,201,974
Eliminations [Member]
Segment Reporting Information [Line Items]
Net interest income	9	217	20	486
Noninterest income	(45,146)	(48,541)	(83,995)	(90,416)
Income before taxes	(45,009)	$ (48,166)	(83,715)	$ (89,617)
Total assets	$ (1,448,676)		$ (1,448,676)		$ (1,362,849)

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	Jun. 30, 2022	Dec. 31, 2021
Derivatives, Fair Value [Line Items]
Derivative assets, Estimated Fair Value	$ 55,174	$ 8,946
Derivative liabilities, Estimated Fair Value	(53,943)	(8,237)
Not Designated as Hedging Instrument [Member] | Oil and Gas Swaps and Options [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets, Estimated Fair Value	55,174	8,946
Not Designated as Hedging Instrument [Member] | Oil and Gas Swaps and Options [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities, Estimated Fair Value	(53,943)	(8,237)
Not Designated as Hedging Instrument [Member] | Oil and Gas Swaps and Options [Member] | Oil [Member]
Derivatives, Fair Value [Line Items]
Derivative asset, Notional Amount	3,599	2,585
Derivative liabilities, Notional Amount	(3,599)	(2,585)
Derivative assets, Estimated Fair Value	40,214	6,563
Derivative liabilities, Estimated Fair Value	(39,506)	(6,129)
Not Designated as Hedging Instrument [Member] | Oil and Gas Swaps and Options [Member] | Gas/Natural Gas Liquids [Member]
Derivatives, Fair Value [Line Items]
Derivative asset, Notional Amount	34,990	19,752
Derivative liabilities, Notional Amount	(34,990)	(19,752)
Derivative assets, Estimated Fair Value	14,960	2,383
Derivative liabilities, Estimated Fair Value	$ (14,437)	$ (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	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Oil and Gas Swaps and Options [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative income	$ 189	$ 37	$ 348	$ 39

Derivative Financial Instrume_5

Derivative Financial Instruments - Additional Information (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Derivative [Line Items]
Percentage share of total profit	35%
Oil and Gas Swaps and Options [Member]
Derivative [Line Items]
Credit exposure	$ 0	$ 0
Other Assets [Member] | Oil and Gas Reserves [Member]
Derivative [Line Items]
Derivative instrument margin amount	$ 98,700	$ 14,300