10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One) 

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2023

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from _____________ to ______________                 

Commission File No. 001-37811

BOK FINANCIAL CORP

(Exact name of registrant as specified in its charter) 

Oklahoma		73-1373454
(State or other jurisdiction of Incorporation or Organization)		(IRS Employer Identification No.)
Bank of Oklahoma Tower
Boston Avenue at Second Street
Tulsa,	Oklahoma	74192
(Address of Principal Executive Offices)		(Zip Code)

(918) 588-6000

(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:
Title of each class	Trading Symbol	Name of each exchange on which registered
Common Stock, par value $0.00006 per share	BOKF	Nasdaq Stock Market

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.       Yes  ý  No  ¨

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

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

Large accelerated filer  ý       Accelerated filer       ¨            

Non-accelerated filer   ¨    Smaller reporting company ☐

    Emerging growth company ☐

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

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

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date: 65,664,840 shares of common stock ($.00006 par value) as of September 30, 2023.

BOK Financial Corporation

Form 10-Q

Quarter Ended September 30, 2023

Index

Part I.  Financial Information
Management's Discussion and Analysis (Item 2)	1
Market Risk (Item 3)	39
Controls and Procedures (Item 4)	44
Consolidated Financial Statements – Unaudited (Item 1)	45
Nine-Month Financial Summary – Unaudited (Item 2)	95
Quarterly Financial Summary – Unaudited (Item 2)	96
Quarterly Earnings Trend – Unaudited	99
Part II.  Other Information
Item 1.  Legal Proceedings	100
Item 1A. Risk Factors	100
Item 2.  Unregistered Sales of Equity Securities and Use of Proceeds	100
Item 5. Other Information	100
Item 6.  Exhibits	101
Signatures	102

Management's Discussion and Analysis of Financial Condition and Results of Operations

Performance Summary

BOK Financial Corporation ("the Company") reported net income of $134.5 million or $2.04 per diluted share for the third quarter of 2023 compared to $151.3 million or $2.27 per diluted share for the second quarter of 2023. Pre-provision net revenue ("PPNR"), a non-GAAP measure, decreased $37.6 million to $174.8 million compared to the second quarter of 2023.

Highlights of the third quarter of 2023 compared to the second quarter of 2023 included:

•Net interest revenue totaled $300.9 million, a decrease of $21.4 million compared to the prior quarter. Net interest margin was 2.69 percent for the third quarter of 2023 compared to 3.00 percent for the prior quarter. Growth in low-spread trading assets drove an 8 basis point decline in net interest margin with deposit repricing activity primarily driving the remaining 23 basis point reduction. For the third quarter of 2023, our core net interest margin excluding trading activities, a non-GAAP measure, was 3.14 percent compared to 3.36 percent in the prior quarter.

•Fees and commissions revenue totaled $197.9 million, a decrease of $2.6 million. Decreased brokerage and trading revenue and mortgage banking revenue were partially offset by increased other revenue.

•Other operating expense totaled $324.3 million, an increase of $5.6 million. Personnel expense was relatively unchanged, while non-personnel expense increased $5.5 million, led by higher occupancy and equipment costs and other expenses.

•Other gains and losses, net decreased $11.1 million to $1.5 million. The prior quarter included gains on alternative investments, primarily attributable to merchant banking activity.

•Period end outstanding loan balances totaled $23.7 billion at September 30, 2023, growing $486 million over June 30, 2023, largely due to growth in commercial and commercial real estate loans secured by multifamily properties. Average loan balances increased $525 million to $23.4 billion.

•The provision for credit losses of $7.0 million in the third quarter of 2023 reflects our continued loan growth and changes in our economic forecast. Net charge-offs were $6.5 million or 0.11 percent of average loans on an annualized basis in the third quarter. The resulting combined allowance for credit losses totaled $325 million or 1.37 percent of outstanding loans at September 30, 2023. The combined allowance for credit losses was $323 million or 1.39 percent of outstanding loans at June 30, 2023.

•Nonperforming assets not guaranteed by U.S. government agencies were $113 million, a $12 million decrease compared to June 30, 2023. Potential problem loans increased by $36 million, while other loans especially mentioned were largely unchanged compared to June 30, 2023.

•Period end deposits were $33.7 billion at September 30, 2023, a $358 million increase over June 30, 2023. Average deposits increased $918 million, including a $1.8 billion increase in average interest-bearing deposits, partially offset by an $840 million reduction in demand deposit balances. The loan to deposit ratio was 70 percent at September 30, 2023, consistent with June 30, 2023.

•Assets under management or administration totaled $99.0 billion at September 30, 2023, decreasing $4.6 billion compared to June 30, 2023.

•The Company's tangible common equity ratio, a non-GAAP measure, was 7.74 percent at September 30, 2023 and 7.79 percent at June 30, 2023. The tangible common equity ratio is primarily based on total shareholders' equity, which includes unrealized gains and losses on available for sale securities. Adjusted for all securities portfolio losses, including the tax adjusted losses in the investment portfolio, the tangible common equity ratio would be 7.35 percent at September 30, 2023 and 7.49 percent at June 30, 2023.

•The common equity Tier 1 capital ratio at September 30, 2023 was 12.06 percent. Other regulatory capital ratios include the Tier 1 capital ratio at 12.07 percent, total capital ratio at 13.16 percent, and leverage ratio at 9.52 percent. At June 30, 2023, the common equity Tier 1 capital ratio was 12.13 percent, the Tier 1 capital ratio was 12.13 percent, total capital ratio was 13.24 percent, and leverage ratio was 9.75 percent.

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•The Company repurchased 700,500 shares of common stock at an average price of $84.17 per share in the third quarter of 2023 and 266,000 shares at an average price of $84.08 in the second quarter of 2023. We view share buybacks opportunistically, but within the context of maintaining our strong capital position.

•The Company paid a regular cash dividend of $35.7 million or $0.54 per common share during the third quarter of 2023. On October 31, 2023, the board of directors approved a quarterly cash dividend of $0.55 per common share payable on or about November 30, 2023 to shareholders of record as of November 15, 2023.

Highlights of the nine months ended September 30, 2023 compared to the nine months ended September 30, 2022 included:

•Tax-equivalent net interest revenue totaled $982.2 million for the nine months ended September 30, 2023 and $864.9 million for the nine months ended September 30, 2022. Net interest revenue increased $166.1 million from changes in interest rates and decreased $48.8 million from changes in earning assets. Net interest margin was 3.03 percent compared to 2.80 percent. In response to rising inflation, the Federal Reserve increased the federal funds rate 525 basis points since the beginning of 2022. The resulting impact on market interest rates increased net interest margin as our earning assets, led by our significant percentage of variable-rate commercial loans, repriced at a higher rate and faster pace than our interest-bearing liabilities. Loan yields increased 285 basis points and funding costs increased 279 basis points. Average earning assets increased $2.2 billion to $42.5 billion. Higher average loan balances were partially offset by lower trading securities balances. In the second quarter of 2022, we transferred $2.4 billion of U.S. government agency mortgage-backed securities from available for sale to the investment securities portfolio to limit the effect of future rate increases on the tangible common equity ratio. Other borrowed funds increased $5.6 billion while total interest-bearing deposits decreased $1.7 billion.

•Fees and commissions revenue totaled $584.3 million for the nine months ended September 30, 2023, a $120.7 million increase over the nine months ended September 30, 2022. Brokerage and trading revenue increased $101.7 million, primarily due to disruptions in the fixed income markets related to economic uncertainty in the first part of 2022. Fiduciary and asset management revenue increased $9.5 million led by growth in mutual fund fees, Cavanal Hill fund fees, and trust fees. Other revenue increased $8.5 million, largely due to increased revenue on bank-owned life insurance and higher margin interest fees. The prior year included a $4.5 million write-down of bank-owned life insurance as the fair value of this portfolio declined and exceeded the maximum support from the stable value wrap.

•Total operating expense was $948.8 million for the nine months ended September 30, 2023, an increase of $102.8 million compared to the nine months ended September 30, 2022. Personnel expense increased $79.1 million. Regular compensation increased $29.4 million, largely related to annual merit increases, salary adjustments, and business expansion. Cash-based incentive compensation grew $22.9 million due to higher sales activity. Share-based compensation expense increased $6.9 million reflecting changes in assumptions of certain performance-based equity awards. Deferred compensation expense, which is offset by changes in fair value of deferred compensation investments, grew $14.6 million. Non-personnel expense increased $23.7 million to $385.2 million, largely due to higher data processing costs related to ongoing technology projects and FDIC insurance costs following increased assessment rates in 2023.

•The provision for expected credit losses was $40.0 million for the nine months ended September 30, 2023, primarily due to growth in loan balances and changes in our economic forecast, including a more challenging national commercial real estate environment, particularly related to office. A $15.0 million provision for expected credit losses was recorded for the nine months ended September 30, 2022.

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Results of Operations

Net Interest Revenue and Net Interest Margin

Net interest revenue is the interest earned on debt securities, loans and other interest-earning assets less interest paid for interest-bearing deposits and other borrowings. The net interest margin is calculated by dividing tax-equivalent net interest revenue by average interest-earning assets. Net interest spread is the difference between the average rate earned on interest-earning assets and the average rate paid on interest-bearing liabilities. Net interest margin is typically greater than net interest spread due to interest income earned on assets funded by non-interest bearing liabilities such as demand deposits and equity.

Tax-equivalent net interest revenue totaled $303.1 million for the third quarter of 2023, compared to $324.5 million for the prior quarter. Compared to the second quarter of 2023, net interest revenue decreased $19.0 million from changes in interest rates and $2.3 million from changes in earning assets. Table 1 shows the effect on net interest revenue from changes in average balances and interest rates for various types of earning assets and interest-bearing liabilities.

Average earning assets increased $1.3 billion compared to the second quarter of 2023. The average balance of trading securities increased $1.2 billion due to favorable market opportunities for U.S. government agency residential mortgage-backed securities observed primarily throughout the second quarter and extending into the early part of the third quarter. Average loan balances increased $525 million, largely due to growth in commercial and commercial real estate loans. Average fair value option securities, held as an economic hedge of the changes in fair value of our mortgage servicing rights, decreased $204 million. The average balance of available for sale securities, which consists largely of residential and commercial mortgage-backed securities guaranteed by U.S. government agencies, decreased $108 million and average interest-bearing cash and cash equivalents declined $110 million.

Total average deposits increased $918 million compared to the second quarter of 2023, including a $1.8 billion increase in interest-bearing deposits, partially offset by an $840 million decrease in demand deposits. Other borrowings grew $1.7 billion while funds purchased and repurchase agreements declined $972 million.

Net interest margin was 2.69 percent compared to 3.00 percent in the second quarter of 2023. Growth in low-spread trading assets drove an 8 basis point decline in net interest margin with deposit price competition and liability mix shift primarily driving the remaining 23 basis point reduction. For the third quarter of 2023, our core net interest margin excluding trading activities, a non-GAAP measure, was 3.14 percent percent compared to 3.36 percent in the prior quarter. The tax-equivalent yield on earning assets was 5.49 percent, an increase of 20 basis points. Loan yields grew 22 basis points to 7.25 percent. The available for sale securities portfolio yield increased 11 basis points to 3.11 percent. The yield on trading securities grew 26 basis points to 4.76 percent.

Funding costs were 3.81 percent, a 54 basis point increase over the prior quarter. The cost of interest-bearing deposits increased 61 basis points to 3.17 percent. The cost of other borrowings increased 36 basis points to 5.48 percent while the cost of funds purchased and repurchase agreements increased 23 basis points to 4.81 percent. The benefit to net interest margin from assets funded by non-interest liabilities was 101 basis points, an increase of 3 basis points.

Our overall objective is to manage the Company's balance sheet for changes in interest rates as is further described in the Market Risk section of this report. Approximately 80 percent of our commercial and commercial real estate loan portfolios are either variable rate or fixed rate that will reprice within one year. These loans are funded primarily by deposit accounts that are either non-interest bearing, or that reprice more slowly than the loans. The result is a balance sheet that is asset sensitive, which means that assets generally reprice more quickly than the liabilities. One of the strategies that we use to manage toward a relative rate-neutral position is to purchase fixed rate residential mortgage-backed securities issued primarily by U.S. government agencies and fund them with market-rate-sensitive liabilities. The liability-sensitive nature of this strategy provides an offset to the asset-sensitive characteristics of our loan portfolio. We also may use derivative instruments to manage our interest rate risk. 

The effectiveness of these strategies is reflected in the overall change in net interest revenue due to changes in interest rates as shown in Table 1 and in the interest rate sensitivity projections as shown in the Market Risk section of this report.

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Table 1 – Volume/Rate Analysis

(In thousands)

	Three Months Ended Sep. 30, 2023 / June 30, 2023						Nine Months Ended Sep. 30, 2023 / 2022
			Change Due To1						Change Due To1
	Change		Volume		Yield/Rate		Change		Volume		Yield/Rate
Tax-equivalent interest revenue:
Interest-bearing cash and cash equivalents	$	(1,353)	$	(1,443)	$	90	$	18,527	$	(5,296)	$	23,823
Trading securities	17,419		14,291		3,128		60,434		(38,592)		99,026
Investment securities	(350)		(341)		(9)		10,718		14,403		(3,685)
Available for sale securities	4,389		762		3,627		107,155		7,529		99,626
Fair value option securities	(2,564)		(2,405)		(159)		6,347		4,238		2,109
Restricted equity securities	2,347		1,982		365		15,819		9,073		6,746
Residential mortgage loans held for sale	142		61		81		(1,332)		(2,979)		1,647
Loans	26,661		11,638		15,023		546,499		78,148		468,351
Total tax-equivalent interest revenue	46,691		24,545		22,146		764,167		66,524		697,643
Interest expense:
Transaction deposits	36,113		8,061		28,052		314,530		(25,286)		339,816
Savings deposits	553		(41)		594		1,497		(56)		1,553
Time deposits	11,476		7,081		4,395		44,546		10,160		34,386
Funds purchased and repurchase agreements	(9,157)		(11,253)		2,096		81,352		26,511		54,841
Other borrowings	28,955		23,008		5,947		202,811		103,980		98,831
Subordinated debentures	102		13		89		2,157		(2)		2,159
Total interest expense	68,042		26,869		41,173		646,893		115,307		531,586
Tax-equivalent net interest revenue	(21,351)		(2,324)		(19,027)		117,274		(48,783)		166,057
Change in tax-equivalent adjustment	14						523
Net interest revenue	$	(21,365)					$	116,751

1 Changes attributable to both volume and yield/rate are allocated to both volume and yield/rate on an equal basis.

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Other Operating Revenue

Other operating revenue was $198.2 million for the third quarter of 2023, a decrease of $10.9 million compared to the second quarter of 2023.

Table 2 – Other Operating Revenue 

(Dollars in thousands)

	Three Months Ended				Increase (Decrease)		% Increase (Decrease)		Nine Months Ended				Increase (Decrease)		% Increase (Decrease)
	Sep. 30, 2023		June 30, 2023						Sep. 30, 2023		Sep. 30, 2022
Brokerage and trading revenue	$	62,312	$	65,006	$	(2,694)	(4)	%	$	179,714	$	77,970	$	101,744	130	%
Transaction card revenue	26,387		26,003		384		1	%	78,011		77,130		881		1	%
Fiduciary and asset management revenue	52,256		52,997		(741)		(1)	%	155,910		146,427		9,483		6	%
Deposit service charges and fees	27,676		27,100		576		2	%	80,744		84,207		(3,463)		(4)	%
Mortgage banking revenue	13,356		15,141		(1,785)		(12)	%	42,864		39,300		3,564		9	%
Other revenue	15,865		14,250		1,615		11	%	47,085		38,608		8,477		22	%
Total fees and commissions revenue	197,852		200,497		(2,645)		(1)	%	584,328		463,642		120,686		26	%
Other gains (losses), net	1,474		12,618		(11,144)		N/A		16,343		(8,304)		24,647		N/A
Loss on derivatives, net	(9,010)		(8,159)		(851)		N/A		(18,513)		(77,559)		59,046		N/A
Loss on fair value option securities, net	(203)		(2,158)		1,955		N/A		(5,323)		(17,790)		12,467		N/A
Change in fair value of mortgage servicing rights	8,039		9,261		(1,222)		N/A		11,241		83,165		(71,924)		N/A
Gain (loss) on available for sale securities, net	—		(3,010)		3,010		N/A		(3,010)		3,017		(6,027)		N/A
Total other operating revenue	$	198,152	$	209,049	$	(10,897)	(5)	%	$	585,066	$	446,171	$	138,895	31	%

Certain percentage increases (decreases) in non-fees and commissions revenue are not meaningful for comparison purposes based on the nature of the item.

Fees and commissions revenue

Diversified sources of fees and commissions revenue are a significant part of our business strategy and represented 40 percent of total revenue for the third quarter of 2023, excluding provision for credit losses and gains and losses on other assets, securities and derivatives and the change in the fair value of mortgage servicing rights. We believe that a variety of fee revenue sources provides diversification to changes resulting from market or economic conditions such as interest rates, values in the equity markets, commodity prices and consumer spending, all of which can be volatile. Many of the economic factors, such as rising interest rates, that we expect will result in growth in net interest revenue or fiduciary and asset management revenue may also affect mortgage banking production volumes and related trading. The velocity of changes in market conditions and interest rates may result in timing differences between when offsetting impacts and benefits are realized. Generally, for operating revenues not as directly related to movement in interest rates, we expect growth to come through offering new products and services and by further development of our presence in other markets. However, current and future economic conditions, regulatory constraints, increased competition and saturation in our existing markets could affect the rate of future increases.

Brokerage and Trading Revenue

Brokerage and trading revenue, which includes revenues from trading, customer hedging, retail brokerage and investment banking, decreased $2.7 million or 4 percent compared to the second quarter of 2023.

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Trading revenue includes net realized and unrealized gains and losses primarily related to residential mortgage-backed securities guaranteed by U.S. government agencies and related derivative instruments that enable our mortgage banking customers to manage their production risk. Trading revenue also includes net realized and unrealized gains and losses on municipal securities and other financial instruments that we sell to institutional customers, along with changes in the fair value of financial instruments we hold as economic hedges against market risk of our trading securities. Trading revenue was $34.5 million, a $2.5 million decrease compared to the prior quarter, primarily related to our municipal bond trading activity, which was influenced by the rising interest rate environment and evolving market expectations during the third quarter.

Customer hedging revenue is based primarily on realized and unrealized changes in the fair value of derivative contracts held for customer risk management programs. As more fully discussed under Customer Risk Management Programs in Note 3 of the Consolidated Financial Statements, we offer commodity, interest rate, foreign exchange and equity derivatives to our customers. Customer hedging revenue totaled $6.9 million, a decrease of $6.8 million, driven by less energy customer activity following a record high in the second quarter. Customer hedging revenue includes credit valuation adjustments of the fair value of derivatives to reflect the risk of counterparty default.

Investment banking, which includes fees earned upon completion of underwriting, financial advisory services and loan syndication fees, totaled $13.9 million for the third quarter of 2023, an increase of $5.7 million compared to the second quarter of 2023, primarily related to the timing and volume of transactions of underwriting fees and financial advisory fees.

Transaction Card Revenue

Transaction card revenue includes revenues from processing transactions on behalf of members of our TransFund electronic fund transfer network, merchant services fees paid by customers for account management and electronic processing of card transactions and interchange fees from our corporate card program. Transaction card revenue totaled $26.4 million for the third quarter of 2023, relatively consistent with the prior quarter.

Fiduciary and Asset Management Revenue

Fiduciary and asset management revenue is earned through managing or holding of assets for customers and executing transactions or providing related services. Fiduciary and asset management revenue is largely based on the fair value of assets. Rates applied to asset values vary based on the nature of the relationship. Fiduciary relationships and managed asset relationships generally have higher fee rates than non-fiduciary and/or managed relationships. Fiduciary and asset management revenue was $52.3 million for the third quarter of 2023, largely unchanged compared to the second quarter of 2023.

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A distribution of assets under management or administration and related fiduciary and asset management revenue follows:

Table 3 – Assets Under Management or Administration

(Dollars in thousands)

	Three Months Ended
	September 30, 2023						June 30, 2023
	Balance1		Revenue2		Margin3		Balance1		Revenue2		Margin3
Managed fiduciary assets:
Personal	$	10,572,514	$	25,808	0.98	%	$	10,687,370	$	26,741	1.00	%
Institutional	18,244,521		8,532		0.19	%	18,705,828		9,103		0.19	%
Total managed fiduciary assets	28,817,035		34,340		0.48	%	29,393,198		35,844		0.49	%
Non-managed assets:
Fiduciary	27,562,974		14,643		0.21	%	28,480,670		14,300		0.20	%
Non-fiduciary	18,215,082		3,273		0.07	%	20,910,245		2,853		0.05	%
Safekeeping and brokerage assets under administration	24,409,088		—		—	%	24,834,827		—		—	%
Total non-managed assets	70,187,144		17,916		0.10	%	74,225,742		17,153		0.09	%
Total assets under management or administration	$	99,004,179	$	52,256	0.21	%	$	103,618,940	$	52,997	0.20	%

	Nine Months Ended
	September 30, 2023						September 30, 2022
	Balance1		Revenue2		Margin3		Balance1		Revenue2		Margin3
Managed fiduciary assets:
Personal	$	10,572,514	$	77,388	1.46	%	$	10,107,830	$	81,760	1.62	%
Institutional	18,244,521		26,858		0.29	%	16,983,268		25,598		0.30	%
Total managed fiduciary assets	28,817,035		104,246		0.72	%	27,091,098		107,358		0.79	%
Non-managed assets:
Fiduciary	27,562,974		42,728		0.31	%	27,623,607		30,134		0.22	%
Non-fiduciary	18,215,082		8,936		0.10	%	18,099,922		8,935		0.10	%
Safekeeping and brokerage assets under administration	24,409,088		—		—	%	22,587,011		—		—	%
Total non-managed assets	70,187,144		51,664		0.15	%	68,310,540		39,069		0.11	%
Total assets under management or administration	$	99,004,179	$	155,910	0.31	%	$	95,401,638	$	146,427	0.31	%

1 Assets under management or administration balance excludes certain assets under custody held by a sub-custodian where minimal revenue is recognized. $18 billion, $19 billion, and $23 billion of such assets are excluded from assets under management or administration at September 30, 2023, June 30, 2023, and September 30, 2022, respectively.

2    Fiduciary and asset management revenue includes asset-based and other fees associated with the assets.

3    Annualized revenue divided by period end balance.

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A summary of changes in assets under management or administration for the three and nine months ended September 30, 2023 and 2022 follows:

Table 4 – Changes in Assets Under Management or Administration

(In thousands)

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Beginning balance	$	103,618,940	$	95,981,289	$	99,735,040	$	104,917,721
Net inflows (outflows)	(3,922,122)		639,636		(4,727,474)		(1,642,712)
Net change in fair value	(692,639)		(1,219,287)		3,996,613		(7,873,371)
Ending balance	$	99,004,179	$	95,401,638	$	99,004,179	$	95,401,638

Assets under management as of September 30, 2023 consist of 43 percent fixed income, 32 percent equities, 16 percent cash, and 9 percent alternative investments.

Deposit Service Charges

Deposit service charges and fees were consistent with the second quarter of 2023.

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Mortgage Banking Revenue

Mortgage banking revenue decreased $1.8 million to $13.4 million, largely due to lower mortgage production and qualifying residential mortgage loans guaranteed by U.S. government agencies previously in forbearance that have been resold into Government National Mortgage Association ("GNMA") pools following the applicable performance period specified by the programs. Mortgage production volume decreased $30 million to $168 million. Production revenue as a percentage of production volume, which includes unrealized gains and losses on our mortgage commitment pipeline and related hedges, decreased 98 basis points to (1.12) percent.

Table 5 – Mortgage Banking Revenue 

(Dollars in thousands)

	Three Months Ended						Increase (Decrease)			% Increase (Decrease)		Nine Months Ended						Increase (Decrease)			% Increase (Decrease)
	Sep. 30, 2023			June 30, 2023								Sep. 30, 2023			Sep. 30, 2022
Mortgage production revenue	$	(1,887)		$	(284)		$	(1,603)		(564)	%	$	(2,804)		$	2,145		$	(4,949)		(231)	%
Mortgage loans funded for sale	$	173,727		$	214,785							$	527,136		$	1,039,313
Add: Current period end outstanding commitments	49,284			55,031								49,284			75,779
Less: Prior period end outstanding commitments	55,031			71,693								45,492			171,412
Total mortgage production volume	$	167,980		$	198,123		$	(30,143)		(15)	%	$	530,928		$	943,680		$	(412,752)		(44)	%
Mortgage loan refinances to mortgage loans funded for sale	9		%	8		%	100		bps			—		%	26		%	(2,600)		bps
Realized margin on funded mortgage loans	(0.94)		%	(0.14)		%	(80)		bps			(0.69)		%	0.86		%	(155)		bps
Production revenue as a percentage of production volume	(1.12)		%	(0.14)		%	(98)		bps			(0.53)		%	0.23		%	(76)		bps
Primary mortgage interest rates:
Average	7.08		%	6.56		%	52		bps			6.66		%	4.90		%	176		bps
Period end	7.35		%	6.70		%	65		bps			7.35		%	6.70		%	65		bps
Mortgage servicing revenue	$	15,243		$	15,425		$	(182)		(1)	%	$	45,668		$	37,155		$	8,513		23	%
Average outstanding principal balance of mortgage loans serviced for others	20,719,116			20,807,044			(87,928)			—	%	20,882,493			17,520,715			$	3,361,778		19	%
Average mortgage servicing revenue rates	0.29		%	0.30		%	(1)		bp			0.29		%	0.28		%	1		bp

Primary rates disclosed in Table 5 above represent rates generally available to borrowers on 30 year conforming mortgage loans.

Net gains on other assets, securities and derivatives

Net gains on other assets were $1.5 million for the third quarter of 2023 compared to net gains of $12.6 million in the second quarter of 2023. The prior quarter included a gain on alternative investments, largely attributable to merchant banking activity. Changes in fair value related to deferred compensation investments decreased $3.5 million.

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As discussed in the Market Risk section following, the fair value of our mortgage servicing rights ("MSRs") changes in response to changes in primary mortgage loan rates and other assumptions. We attempt to mitigate the earnings volatility caused by changes in the fair value of MSRs by designating certain financial instruments as an economic hedge. Changes in the fair value of these instruments are generally expected to partially offset changes in the fair value of MSRs.

Table 6 – Gain (Loss) on Mortgage Servicing Rights

(In thousands)

	Three Months Ended				Nine Months Ended
	Sep. 30, 2023		June 30, 2023		Sep. 30, 2023		Sep. 30, 2022
Loss on mortgage hedge derivative contracts, net	$	(8,980)	$	(8,099)	$	(18,790)	$	(77,360)
Loss on fair value option securities, net	(203)		(2,158)		(5,323)		(17,790)
Loss on economic hedge of mortgage servicing rights, net	(9,183)		(10,257)		(24,113)		(95,150)
Gain on change in fair value of mortgage servicing rights	8,039		9,261		11,241		83,165
Loss on changes in fair value of mortgage servicing rights, net of economic hedges included in other operating revenue	(1,144)		(996)		(12,872)		(11,985)
Net interest revenue (expense) on fair value option securities1	(112)		(232)		(157)		687
Total economic cost of changes in the fair value of mortgage servicing rights, net of economic hedges	$	(1,256)	$	(1,228)	$	(13,029)	$	(11,298)

1    Actual interest earned on fair value option securities less internal transfer-priced cost of funds.

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Other Operating Expense

Other operating expense for the third quarter of 2023 totaled $324.3 million, an increase of $5.6 million compared to the second quarter of 2023. Our efficiency ratio1 was 64.01% for the third quarter of 2023, compared to 58.75% in the prior quarter.

Table 7 – Other Operating Expense

(Dollars in thousands)

	Three Months Ended				Increase (Decrease)		% Increase (Decrease)		Nine Months Ended				Increase (Decrease)		% Increase (Decrease)
	Sep. 30, 2023		June 30, 2023						Sep. 30, 2023		Sep. 30, 2022
Regular compensation	$	111,237	$	109,197	$	2,040	2	%	$	325,552	$	296,164	$	29,388	10	%
Incentive compensation:
Cash-based	51,139		48,331		2,808		6	%	141,205		118,300		22,905		19	%
Share-based	3,489		4,566		(1,077)		(24)	%	13,312		6,458		6,854		106	%
Deferred compensation	60		2,685		(2,625)		N/A		4,455		(10,099)		14,554		N/A
Total incentive compensation	54,688		55,582		(894)		(2)	%	158,972		114,659		44,313		39	%
Employee benefits	24,866		25,873		(1,007)		(4)	%	79,064		73,676		5,388		7	%
Total personnel expense	190,791		190,652		139		—	%	563,588		484,499		79,089		16	%
Business promotion	6,958		7,640		(682)		(9)	%	23,167		18,965		4,202		22	%
Charitable contributions to BOKF Foundation	23		1,142		(1,119)		N/A		1,165		—		1,165		N/A
Professional fees and services	13,224		12,777		447		4	%	39,049		37,977		1,072		3	%
Net occupancy and equipment	32,583		30,105		2,478		8	%	91,147		87,640		3,507		4	%
Insurance	7,996		6,974		1,022		15	%	22,285		13,317		8,968		67	%
Data processing and communications	45,672		45,307		365		1	%	135,781		122,859		12,922		11	%
Printing, postage and supplies	3,760		3,728		32		1	%	11,381		11,967		(586)		(5)	%
Amortization of intangible assets	3,474		3,474		—		—	%	10,339		11,956		(1,617)		(14)	%
Mortgage banking costs	8,357		8,300		57		1	%	22,439		26,818		(4,379)		(16)	%
Other expense	11,475		8,574		2,901		34	%	28,457		30,026		(1,569)		(5)	%
Total other operating expense	$	324,313	$	318,673	$	5,640	2	%	$	948,798	$	846,024	$	102,774	12	%
Average number of employees (full-time equivalent)	4,927		4,875		52		1	%	4,855		4,748		107		2	%

Certain percentage increases (decreases) are not meaningful for comparison purposes.

Personnel expense

Personnel expense was largely unchanged compared to the second quarter of 2023. Cash-based incentive compensation increased $2.8 million, driven by sales activities. Deferred compensation, which is offset by changes in the fair value of deferred compensation investments, decreased $2.6 million, directly related to market movements. Share-based compensation was down $1.1 million reflecting changes in assumptions of certain performance-based equity awards. Regular compensation increased $2.0 million, along with our business expansion into the San Antonio and Memphis markets. Employee benefits expense decreased $1.0 million, primarily due to seasonal decreases in payroll taxes.

1    See Explanation and Reconciliation of Non-GAAP Measures in "Non-GAAP Measures" section following.

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Non-personnel operating expense

Non-personnel expense totaled $133.5 million for the third quarter of 2023, an increase of $5.5 million compared to the second quarter of 2023. Occupancy and equipment costs grew $2.5 million, driven by the retirement of certain automated teller machines ("ATMs") as we upgrade our network. Other expense increased $2.9 million, primarily due to an accrual for certain disputed matters. FDIC insurance expense also increased $1.0 million.

Income Taxes

The effective tax rate was 19.8 percent for the third quarter of 2023 and 22.5 percent for the second quarter of 2023. The effective tax rate for the third quarter of 2023 decreased primarily due to a decrease in uncertain tax positions from lapses of applicable statutes of limitations. The effective rate for the nine months ended September 30, 2023 and September 30, 2022 was 21.5 percent and 20.7 percent, respectively, increasing primarily due to higher forecasted and actual pre-tax income.

Lines of Business

We operate three principal lines of business: Commercial Banking, Consumer Banking and Wealth Management. Commercial Banking includes lending, treasury and cash management services and customer risk management products for small businesses, middle market and larger commercial customers. Commercial Banking also includes the TransFund EFT network. Consumer Banking includes retail lending and deposit services, lending and deposit services to small business customers served through our consumer branch network and all mortgage banking activities. Wealth Management provides fiduciary services, private banking services, insurance and investment advisory services in all markets. Wealth Management also underwrites state and municipal securities and engages in brokerage and trading activities.

In addition to our lines of business, we have a Funds Management unit. The primary purpose of this unit is to manage our overall liquidity needs and interest rate risk. Each line of business borrows funds from and provides funds to the Funds Management unit as needed to support their operations. Operating results for Funds Management and other include the effect of interest rate risk positions and risk management activities, securities gains and losses including impairment charges, the provision for credit losses in excess of net loans charged off, tax planning strategies and certain executive compensation costs that are not attributed to the lines of business.

We allocate resources and evaluate the performance of our lines of business using the net direct contribution, which includes the allocation of funds and capital costs. Credit costs are attributed to the lines of business based on net loans charged off or recovered. The difference between credit costs attributed to the lines of business and the consolidated provision for credit losses is attributed to Funds Management. In addition, we measure the performance of our business lines after allocations of certain indirect expenses and taxes based on statutory rates.

The cost of funds borrowed from the Funds Management unit by the operating lines of business is transfer priced at rates that approximate market rates for funds with similar repricing and cash flow characteristics. Market rates are generally based on the applicable wholesale borrowing rates or interest rate swap rates, adjusted for prepayment risk and liquidity risk. This method of transfer-pricing funds that support assets of the operating lines of business tends to insulate them from interest rate risk.

The value of funds provided by the operating lines of business to the Funds Management unit is also based on rates that approximate wholesale market rates for funds with similar repricing and cash flow characteristics. Market rates are generally based on a proxy of wholesale borrowing rates or interest rate swap rates. The funds credit formula applied to deposit products with indeterminate maturities is established based on their repricing characteristics reflected in a combination of the short-term wholesale funding rate and a moving average of an intermediate term swap rate, with an appropriate spread applied to both. Shorter duration products are weighted towards the short term wholesale funding rates and longer duration products are weighted towards the intermediate swap rates. The expected duration ranges from 30 days for certain rate-sensitive deposits to five years. For indeterminate-maturity deposits, annual adjustments are made to the funds credit formula each January that attribute more or less deposit credit value to the business lines dependent upon historical and forward-looking interest rate expectations, which are then held constant throughout the remainder of the year. After several years of decreased funding credits provided to business lines from a sustained low interest rate environment, increases in short-term and long-term rates in response to the Federal Reserve's actions to control inflation caused a commensurate increase in funding credits to business lines in the first quarter of 2023, with the offset to Funds Management and other.

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Economic capital is assigned to the business units by a capital allocation model that reflects management's assessment of risk. This model assigns capital based upon credit, operating, interest rate and other market risk inherent in our business lines and recognizes the diversification benefits among the units. The level of assigned economic capital is a combination of the risk taken by each business line based on its actual exposures and calibrated to its own loss history where possible. Average invested capital includes economic capital and amounts we have invested in the lines of business.

As shown in Table 8, net income attributable to our lines of business decreased $28.9 million compared to the second quarter of 2023. Net interest revenue decreased $19.3 million largely as a result of deposit repricing activity while other operating revenue decreased $10.7 million. Operating expense increased $10.9 million over the second quarter of 2023 with a $4.3 million increase in personnel expense and $6.6 million increase in non-personnel expense.

Table 8 – Net Income by Line of Business

(Dollars in thousands)

	Three Months Ended				Increase (Decrease)		% Increase (Decrease)		Nine Months Ended				Increase (Decrease)		% Increase (Decrease)
	Sep. 30, 2023		June 30, 2023						Sep. 30, 2023		Sep. 30, 2022
Commercial Banking	$	157,930	$	170,179	$	(12,249)	(7)	%	$	505,415	$	321,775	$	183,640	57	%
Consumer Banking	58,009		60,332		(2,323)		(4)	%	169,024		(3,109)		172,133		(5,537)	%
Wealth Management	43,029		57,317		(14,288)		(25)	%	152,793		64,573		88,220		137	%
Subtotal	258,968		287,828		(28,860)		(10)	%	827,232		383,239		443,993		116	%
Funds Management and other	(124,473)		(136,520)		12,047		N/A		(379,061)		(31,395)		(347,666)		N/A
Total	$	134,495	$	151,308	$	(16,813)	(11)	%	$	448,171	$	351,844	$	96,327	27	%

Certain percentage increases (decreases) in non-fees and commissions revenue are not meaningful for comparison purposes based on the nature of the item.

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Commercial Banking

Commercial Banking contributed $157.9 million to consolidated net income in the third quarter of 2023, a decrease of $12.2 million or 7 percent compared to the second quarter of 2023.

Table 9 – Commercial Banking

(Dollars in thousands)

	Three Months Ended				Increase (Decrease)		% Increase (Decrease)		Nine Months Ended				Increase (Decrease)		% Increase (Decrease)
	Sep. 30, 2023		June 30, 2023						Sep. 30, 2023		Sep. 30, 2022
Net interest revenue from external sources	$	298,293	$	299,712	$	(1,419)	—	%	$	886,263	$	546,599	$	339,664	62	%
Net interest expense from internal sources	(43,829)		(39,613)		(4,216)		(11)	%	(104,543)		(34,983)		(69,560)		(199)	%
Total net interest revenue	254,464		260,099		(5,635)		(2)	%	781,720		511,616		270,104		53	%
Net loans charged off	4,904		6,000		(1,096)		(18)	%	10,980		3,316		7,664		231	%
Net interest revenue after net loans charged off	249,560		254,099		(4,539)		(2)	%	770,740		508,300		262,440		52	%
Fees and commissions revenue	57,858		59,704		(1,846)		(3)	%	173,397		174,992		(1,595)		(1)	%
Other gains, net	1,295		9,124		(7,829)		(86)	%	11,429		4,509		6,920		153	%
Other operating revenue	59,153		68,828		(9,675)		(14)	%	184,826		179,501		5,325		3	%
Personnel expense	48,823		46,055		2,768		6	%	137,625		125,290		12,335		10	%
Non-personnel expense	32,928		31,424		1,504		5	%	94,739		84,722		10,017		12	%
Other operating expense	81,751		77,479		4,272		6	%	232,364		210,012		22,352		11	%
Net direct contribution	226,962		245,448		(18,486)		(8)	%	723,202		477,789		245,413		51	%
Gain (loss) on financial instruments, net	(11)		231		(242)		(105)	%	162		(138)		300		(217)	%
Gain (loss) on repossessed assets, net	(268)		408		(676)		(166)	%	999		(2,880)		3,879		(135)	%
Corporate expense allocations	17,834		21,404		(3,570)		(17)	%	56,956		49,285		7,671		16	%
Income before taxes	208,849		224,683		(15,834)		(7)	%	667,407		425,486		241,921		57	%
Federal and state income tax	50,919		54,504		(3,585)		(7)	%	161,992		103,711		58,281		56	%
Net income	$	157,930	$	170,179	$	(12,249)	(7)	%	$	505,415	$	321,775	$	183,640	57	%
Average assets	$	28,849,597	$	28,170,869	$	678,728	2	%	$	28,396,982	$	29,324,596	$	(927,614)	(3)	%
Average loans	19,645,259		19,158,984		486,275		3	%	19,188,167		17,317,109		1,871,058		11	%
Average deposits	15,098,038		14,822,093		275,945		2	%	15,257,676		18,825,930		(3,568,254)		(19)	%
Average invested capital	2,178,908		2,174,335		4,573		—	%	2,156,183		2,040,038		116,145		6	%

Certain percentage increases (decreases) in non-fees and commissions revenue are not meaningful for comparison purposes based on the nature of the item.

Net interest revenue decreased $5.6 million or 2 percent compared to the second quarter of 2023, primarily due to a shift in deposit balances from non-interest bearing to interest-bearing accounts. Net loans charged-off decreased $1.1 million to $4.9 million in the third quarter of 2023.

Fees and commissions revenue decreased $1.8 million or 3 percent. Customer hedging revenue decreased $5.4 million following a record high in the second quarter, partially offset by increases in other revenue and investment banking revenue.

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Operating expense increased $4.3 million or 6 percent compared to the second quarter of 2023, largely driven by the retirement of certain ATMs as we upgrade our network combined with increased incentive compensation expense. Corporate expense allocations decreased $3.6 million or 17 percent compared to the prior quarter. The second quarter of 2023 also included a gain on alternative investments of $8.1 million resulting from merchant banking activities.

Average outstanding balance of loans attributed to Commercial Banking increased $486 million or 3 percent over the second quarter of 2023 to $19.6 billion. See the Loans section of Management's Discussion and Analysis of Financial Condition following for additional discussion of changes in commercial and commercial real estate loans, which are primarily attributed to the Commercial Banking segment. 

Average deposits attributed to Commercial Banking increased $276 million or 2 percent over the second quarter of 2023 to $15.1 billion. See Management's Discussion and Analysis of Financial Condition and Results of Operations – Liquidity and Capital for further discussion of changes.

- 15 -

Consumer Banking

Consumer Banking provides retail banking services through four primary distribution channels: traditional branches, the 24-hour ExpressBank call center, internet banking and mobile banking. Consumer Banking also conducts mortgage banking activities through offices located outside of our Consumer Banking markets.

Consumer Banking contributed $58.0 million to consolidated net income for the third quarter of 2023, a decrease of $2.3 million or 4 percent compared to the prior quarter.

Table 10 – Consumer Banking

(Dollars in thousands)

	Three Months Ended				Increase (Decrease)		% Increase (Decrease)		Nine Months Ended				Increase (Decrease)		% Increase (Decrease)
	Sep. 30, 2023		June 30, 2023						Sep. 30, 2023		Sep. 30, 2022
Net interest revenue from external sources	$	11,386	$	17,828	$	(6,442)	(36)	%	$	50,360	$	51,183	$	(823)	(2)	%
Net interest revenue from internal sources	101,222		95,563		5,659		6	%	285,020		53,764		231,256		430	%
Total net interest revenue	112,608		113,391		(783)		(1)	%	335,380		104,947		230,433		220	%
Net loans charged off (recovered)	(73)		1,129		(1,202)		(106)	%	2,240		3,716		(1,476)		(40)	%
Net interest revenue after net loans charged off (recovered)	112,681		112,262		419		—	%	333,140		101,231		231,909		229	%
Fees and commissions revenue	30,715		32,361		(1,646)		(5)	%	93,657		94,308		(651)		(1)	%
Other gains (losses), net	1		(84)		85		(101)	%	(54)		(72)		18		(25)	%
Other operating revenue	30,716		32,277		(1,561)		(5)	%	93,603		94,236		(633)		(1)	%
Personnel expense	22,591		22,468		123		1	%	66,421		64,738		1,683		3	%
Non-personnel expense	31,906		29,872		2,034		7	%	90,614		89,947		667		1	%
Total other operating expense	54,497		52,340		2,157		4	%	157,035		154,685		2,350		2	%
Net direct contribution	88,900		92,199		(3,299)		(4)	%	269,708		40,782		228,926		561	%
Loss on financial instruments, net	(9,183)		(10,257)		1,074		(10)	%	(24,113)		(95,150)		71,037		(75)	%
Change in fair value of mortgage servicing rights	8,039		9,261		(1,222)		(13)	%	11,241		83,165		(71,924)		(86)	%
Gain on repossessed assets, net	11		—		11		N/A		25		138		(113)		(82)	%
Corporate expense allocations	11,920		12,318		(398)		(3)	%	35,860		32,994		2,866		9	%
Income (loss) before taxes	75,847		78,885		(3,038)		(4)	%	221,001		(4,059)		225,060		(5,545)	%
Federal and state income tax	17,838		18,553		(715)		(4)	%	51,977		(950)		52,927		(5,571)	%
Net income (loss)	$	58,009	$	60,332	$	(2,323)	(4)	%	$	169,024	$	(3,109)	$	172,133	(5,537)	%
Average assets	$	9,379,478	$	9,597,723	$	(218,245)	(2)	%	$	9,635,204	$	10,281,679	$	(646,475)	(6)	%
Average loans	1,812,606		1,762,568		50,038		3	%	1,774,376		1,676,276		98,100		6	%
Average deposits	7,936,186		7,986,674		(50,488)		(1)	%	8,055,990		8,812,235		(756,245)		(9)	%
Average invested capital	285,325		279,257		6,068		2	%	273,405		253,007		20,398		8	%

Certain percentage increases (decreases) in non-fees and commissions revenue are not meaningful for comparison purposes based on the nature of the item.

Net interest revenue from Consumer Banking activities was relatively consistent with the second quarter of 2023.

- 16 -

Operating revenue decreased $1.6 million or 5 percent due to a decline in mortgage banking revenue. Mortgage banking revenue decreased $1.7 million, largely due to lower mortgage production and qualifying residential mortgage loans guaranteed by U.S. government agencies previously in forbearance that have been resold into GNMA pools following the applicable performance period specified by the programs. In addition, mortgage production volume decreased $30.1 million to $168.0 million. Operating expense increased $2.2 million or 4 percent due to an accrual for certain disputed matters. Corporate expense allocations were relatively consistent with the second quarter of 2023.

Average loans increased $50.0 million or 3 percent to $1.8 billion over the previous quarter. Average deposits attributed to the Consumer Banking segment were relatively consistent with the prior quarter. See Management's Discussion and Analysis of Financial Condition and Results of Operations – Liquidity and Capital for further discussion of the changes.

- 17 -

Wealth Management

Wealth Management contributed $43.0 million to consolidated net income in the third quarter of 2023, a decrease of $14.3 million or 25 percent compared to the second quarter of 2023.

Table 11 – Wealth Management

(Dollars in thousands)

	Three Months Ended				Increase (Decrease)		% Increase (Decrease)		Nine Months Ended				Increase (Decrease)		% Increase (Decrease)
	Sep. 30, 2023		June 30, 2023						Sep. 30, 2023		Sep. 30, 2022
Net interest revenue from external sources	$	7,622	$	4,415	$	3,207	73	%	$	32,977	$	130,389	$	(97,412)	(75)	%
Net interest revenue (expense) from internal sources	28,815		44,937		(16,122)		(36)	%	106,918		(3,290)		110,208		3,350	%
Total net interest revenue	36,437		49,352		(12,915)		(26)	%	139,895		127,099		12,796		10	%
Net loans charged off (recovered)	9		(45)		54		120	%	(60)		(153)		93		61	%
Net interest revenue after net loans charged off (recovered)	36,428		49,397		(12,969)		(26)	%	139,955		127,252		12,703		10	%
Fees and commissions revenue	123,614		123,050		564		—	%	355,575		224,907		130,668		58	%
Other losses, net	—		(7)		7		(100)	%	(7)		(15)		8		(53)	%
Other operating revenue	123,614		123,043		571		—	%	355,568		224,892		130,676		58	%
Personnel expense	63,706		62,263		1,443		2	%	185,493		164,677		20,816		13	%
Non-personnel expense	25,661		22,596		3,065		14	%	70,772		65,489		5,283		8	%
Other operating expense	89,367		84,859		4,508		5	%	256,265		230,166		26,099		11	%
Net direct contribution	70,675		87,581		(16,906)		(19)	%	239,258		121,978		117,280		96	%
Corporate expense allocations	14,331		12,574		1,757		14	%	39,265		37,508		1,757		5	%
Income before taxes	56,344		75,007		(18,663)		(25)	%	199,993		84,470		115,523		137	%
Federal and state income tax	13,315		17,690		(4,375)		(25)	%	47,200		19,897		27,303		137	%
Net income	$	43,029	$	57,317	$	(14,288)	(25)	%	$	152,793	$	64,573	$	88,220	137	%
Average assets	$	14,740,641	$	12,949,258	$	1,791,383	14	%	$	13,128,925	$	17,320,779	$	(4,191,854)	(24)	%
Average loans	2,219,829		2,230,906		(11,077)		—	%	2,217,519		2,147,007		70,512		3	%
Average deposits	7,886,962		7,544,143		342,819		5	%	7,622,838		8,694,459		(1,071,621)		(12)	%
Average invested capital	329,856		333,902		(4,046)		(1)	%	310,113		295,139		14,974		5	%

Certain percentage increases (decreases) in non-fees and commissions revenue are not meaningful for comparison purposes based on the nature of the item.

- 18 -

Combined net interest revenue and fee revenue decreased $12.4 million or 7 percent compared to the second quarter of 2023, primarily due to declining spreads on loans and deposits. Total revenue from institutional trading activities decreased $4.4 million, largely related to our municipal bond trading activity, which was influenced by the rising interest rate environment and evolving market expectations. Investment banking revenue increased $4.7 million due to increased underwriting fees and financial advisory fees. Other revenue decreased $1.7 million. Operating expense increased $4.5 million or 5 percent compared to the prior quarter. Personnel expense increased $1.4 million due to growth in regular compensation from business expansion. Non-personnel expense increased $3.1 million, primarily due to ongoing technology project costs. Corporate expense allocations increased $1.8 million or 14 percent compared to the previous quarter.

Average outstanding loans attributed to the Wealth Management segment were consistent with the prior quarter. Average Wealth Management deposits increased $343 million or 5 percent to $7.9 billion. See Management's Discussion and Analysis of Financial Condition and Results of Operations – Liquidity and Capital for further discussion of the changes.

Financial Condition

Securities

We maintain a securities portfolio to enhance profitability, manage interest rate risk, provide liquidity and comply with regulatory requirements. Securities are classified as trading, held for investment, or available for sale. See Note 2 to the Consolidated Financial Statements for the composition of the securities portfolio as of September 30, 2023 and December 31, 2022.

We hold an inventory of trading securities in support of sales to a variety of customers, including banks, corporations, insurance companies, money managers and others. Trading securities decreased $694 million to $4.7 billion during the third quarter of 2023. As discussed in the Market Risk section of this report, trading activities involve risk of loss from adverse price movement. We mitigate this risk within board-approved limits through the use of derivative contracts, short-sales and other techniques.

At September 30, 2023, the carrying value of investment (held-to-maturity) securities was $2.3 billion, including a $344 thousand allowance for expected credit losses, compared to $2.4 billion at June 30, 2023 with a $465 thousand allowance for expected credit losses. The fair value of investment securities was $2.1 billion at September 30, 2023, a $133 million decrease compared to the prior quarter. Investment securities consist primarily of residential mortgage-backed securities issued by U.S. government agencies, intermediate and long-term, fixed rate Oklahoma and Texas municipal bonds, and taxable Texas school construction bonds.

Available for sale securities, which may be sold prior to maturity, are carried at fair value. Unrealized gains or losses, net of deferred taxes, are recorded as accumulated other comprehensive income in shareholders' equity. The amortized cost of available for sale securities totaled $12.9 billion at September 30, 2023, a $104 million increase compared to June 30, 2023. At September 30, 2023, the available for sale securities portfolio consisted primarily of U.S. government agency residential mortgage-backed securities and U.S. government agency commercial mortgage-backed securities. Both residential and commercial mortgage-backed securities have credit risk from delinquency or default of the underlying loans. We mitigate this risk by primarily investing in securities issued by U.S. government agencies. Principal and interest payments on the underlying loans are fully guaranteed. Commercial mortgage-backed securities have prepayment penalties similar to commercial loans.

A primary risk of holding residential mortgage-backed securities comes from extension during periods of rising interest rates or contraction in the form of more rapid prepayments during periods of falling interest rates. We evaluate this risk through extensive modeling of risk both before making an investment and throughout the life of the security. Our best estimate of the duration of the combined residential mortgage-backed securities portfolio held in investment and available for sale securities was 3.7 years as of September 30, 2023 and 3.5 years as of June 30, 2023. Management estimates the duration extends to 4.1 years assuming an immediate 200 basis point upward shock. The estimated duration contracts to 3.0 years assuming a 200 basis point decline in the current rate environment. The duration of the total investment portfolio is 3.4 years, extends to 3.6 years in an upward shock of 200 basis points, and contracts to 3.0 years in a down 200 basis point shock scenario. Management also regularly monitors the impact of interest rate risk on the available for sale securities portfolio on our tangible equity ratio under various shock scenarios.

- 19 -

Bank-Owned Life Insurance

We have approximately $407 million of bank-owned life insurance at September 30, 2023. This investment is expected to provide a long-term source of earnings to support existing employee benefit programs. Approximately $312 million is held in separate accounts and $95 million represents the cash surrender value of policies held in general accounts and other amounts due from various insurance companies. Our separate account holdings are invested in diversified portfolios of investment-grade fixed income securities and cash equivalents, including U.S. Treasury and agency securities, residential mortgage-backed securities, corporate debt, asset-backed and commercial mortgage-backed securities. The portfolios are managed by unaffiliated professional managers within parameters established in the portfolio's investment guidelines. The cash surrender value of certain life insurance policies is further supported by a stable value wrap, which protects against changes in the fair value of the investments. As of September 30, 2023, the fair value of investments held in separate accounts covered by the stable value wrap was approximately $271 million. Since the underlying fair value of the investments held in separate accounts at September 30, 2023 was below the net book value of the investments, $39 million of cash surrender value was supported by the stable value wrap. The remaining $2 million of fair value held in separate accounts is not supported by the stable value wrap. Future rate increases may cause write-downs in the short-term. The stable value wrap is provided by an investment grade financial institution. 

- 20 -

Loans

The aggregate loan portfolio before allowance for loan losses totaled $23.7 billion at September 30, 2023, growing $486 million over June 30, 2023, driven by growth in commercial and commercial real estate loans.

Table 12 – Loans

(In thousands)

	Sep. 30, 2023		June 30, 2023		Mar. 31, 2023		Dec. 31, 2022		Sep. 30, 2022
Commercial:
Healthcare	$	4,083,134	$	3,991,387	$	3,899,341	$	3,845,017	$	3,826,623
Services	3,566,361		3,585,169		3,563,702		3,431,521		3,280,925
Energy	3,490,602		3,508,752		3,398,057		3,424,790		3,371,588
General business	3,579,742		3,449,208		3,356,249		3,511,171		3,148,783
Total commercial	14,719,839		14,534,516		14,217,349		14,212,499		13,627,919
Commercial real estate:
Multifamily	1,734,688		1,502,971		1,363,881		1,212,883		1,126,700
Industrial	1,432,629		1,349,709		1,309,435		1,221,501		1,103,905
Office	981,876		1,005,660		1,045,700		1,053,331		1,086,615
Retail	608,073		617,886		618,264		620,518		635,021
Residential construction and land development	100,465		106,370		102,828		95,684		91,690
Other commercial real estate	383,569		388,205		375,208		402,860		429,980
Total commercial real estate	5,241,300		4,970,801		4,815,316		4,606,777		4,473,911
Loans to individuals:
Residential mortgage	2,090,992		1,993,690		1,926,027		1,890,784		1,851,836
Residential mortgage guaranteed by U.S. government agencies	161,092		186,170		224,753		245,940		262,466
Personal	1,510,795		1,552,482		1,566,608		1,601,150		1,574,325
Total loans to individuals	3,762,879		3,732,342		3,717,388		3,737,874		3,688,627
Total	$	23,724,018	$	23,237,659	$	22,750,053	$	22,557,150	$	21,790,457

Commercial

Commercial loans represent loans for working capital, facilities acquisition or expansion, purchases of equipment and other needs of commercial customers primarily located within our geographical footprint. These loans are underwritten individually and represent ongoing relationships based on a thorough knowledge of the customer, the customer's industry and market. While commercial loans are generally secured by the customer's assets including real property, inventory, accounts receivable, operating equipment, interests in mineral rights and other property and may also include personal guarantees of the owners and related parties, the primary source of repayment of the loans is the ongoing cash flow from operations of the customer's business. In addition, revolving lines of credit are generally governed by a borrowing base. Inherent lending risks are centrally monitored on a continuous basis from underwriting throughout the life of the loan for compliance with commercial lending policies.

Commercial loans totaled $14.7 billion or 62 percent of the loan portfolio at September 30, 2023, a $185 million increase over June 30, 2023, primarily due to growth in general business and healthcare loans.

Approximately 71 percent of loans in this segment are located within our geographic footprint based on collateral location. Loans for which the collateral location is less relevant, such as unsecured loans and reserve-based energy loans, are categorized by the borrower's primary operating location. The largest concentration of loans in this segment outside of our footprint is California, totaling 5 percent of the segment.

- 21 -

Supporting the energy industry with loans to producers and other energy-related entities has been a hallmark of the Company since its founding and represents a large portion of our commercial loan portfolio. In addition, energy production and related industries have a significant impact on the economy in our primary markets. Loans collateralized by oil and gas properties are subject to a semi-annual engineering review by our internal staff of petroleum engineers. This review is used as the basis for developing the expected cash flows supporting the loan amount. The projected cash flows are discounted according to risk characteristics of the underlying oil and gas properties. Loans are evaluated to demonstrate with reasonable certainty that crude oil, natural gas and natural gas liquids can be recovered from known oil and gas reservoirs under existing economic and operating conditions at current pricing levels and with existing conventional equipment and operating methods and costs. As part of our evaluation of credit quality, we analyze rigorous stress tests over a range of commodity prices and take proactive steps to mitigate risk when appropriate.

Outstanding energy loans totaled $3.5 billion or 15 percent of total loans at September 30, 2023, an $18 million decrease compared to June 30, 2023. Approximately $2.7 billion of energy loans were to oil and gas producers, a $39 million increase compared to June 30, 2023. The majority of this portfolio is first lien, senior secured, reserve-based lending, which we believe is the lowest risk form of energy lending. Approximately 69 percent of the committed production loans are secured by properties primarily producing oil, and 31 percent of the committed production loans are secured by properties primarily producing natural gas.

Loans to midstream oil and gas companies totaled $551 million at September 30, 2023, a $25 million decrease compared to June 30, 2023. Loans to borrowers that provide services to the energy industry totaled $165 million at September 30, 2023, a decrease of $33 million. Loans to other energy borrowers, including those engaged in wholesale or retail energy sales, totaled $60 million, largely unchanged compared to the prior quarter.

Unfunded energy loan commitments were $4.1 billion at September 30, 2023, a $219 million decrease compared to June 30, 2023.

The healthcare sector of the loan portfolio totaled $4.1 billion or 17 percent of total loans. Healthcare loans increased $92 million over June 30, 2023, primarily due to growth in loans to senior housing facilities and other medical practices. Healthcare sector loans consist primarily of loans for the development and operation of senior housing and care facilities including independent living, assisted living and skilled nursing. Generally we loan to borrowers with a portfolio of multiple facilities that serves to help diversify risks specific to a single facility.

The services sector of the loan portfolio totaled $3.6 billion or 15 percent of total loans, a $19 million decrease compared to the prior quarter. Service sector loans consist of a large number of loans to a variety of businesses including Native American tribal and state and local governments, Native American tribal casino operations, foundations and not-for-profit organizations, educational services and specialty trade contractors. Approximately $1.6 billion of the services category is made up of loans with individual balances of less than $10 million. Services sector loans are generally secured by the assets of the borrower with repayment coming from the cash flows of ongoing operations of the customer's business.

General business loans totaled $3.6 billion or 15 percent of total loans, an increase of $131 million compared to the prior quarter. General business loans consist of $2.2 billion of wholesale/retail loans and $1.4 billion of loans from other commercial industries.

We participate in shared national credits when appropriate to obtain or maintain business relationships with local customers. Shared national credits are defined by banking regulators as credits of $100 million or more and with three or more non-affiliated banks as participants. At September 30, 2023, the outstanding principal balance of these loans totaled $5.8 billion, including $2.5 billion of energy loans. Substantially all of these loans are to borrowers with local market relationships. We serve as the agent lender in approximately 21 percent of our shared national credits, based on dollars committed. We hold shared national credits to the same standard of analysis and perform the same level of review as internally originated credits. Our lending policies generally avoid loans in which we do not have the opportunity to maintain or achieve other business relationships with the customer. In addition to management's quarterly assessment of credit risk, banking regulators annually review a sample of shared national credits for proper risk grading.

- 22 -

Commercial Real Estate

Commercial real estate represents loans for the construction of buildings or other improvements to real estate and property held by borrowers for investment purposes generally within our geographical footprint. We require collateral values in excess of the loan amounts, demonstrated cash flows in excess of expected debt service requirements, equity investment in the project and a portion of the project already sold, leased or permanent financing already secured. The expected cash flows from all significant new or renewed income producing property commitments are stress tested to reflect the risks in varying interest rates, vacancy rates and rental rates. As with commercial loans, inherent lending risks are centrally monitored on a continuous basis from underwriting throughout the life of the loan for compliance with applicable lending policies.

The outstanding balance of commercial real estate loans grew by $270 million over June 30, 2023 to $5.2 billion or 22 percent of total loans at September 30, 2023, primarily driven by the funding of commercial real estate loan commitments. Loans secured by multifamily properties increased $232 million to $1.7 billion and loans secured by industrial facilities grew by $83 million to $1.4 billion at September 30, 2023. This growth was partially offset by a $24 million decrease in loans secured by office facilities.

Approximately 66 percent of loans in this segment are in our geographic footprint based on collateral location. The largest concentration of loans in this segment outside our footprint is Utah, totaling 10 percent of the segment. All other states represent less than 5 percent individually.

Unfunded commercial real estate loan commitments were $2.0 billion at September 30, 2023, a decrease of $411 million compared to June 30, 2023. We take a disciplined approach to managing our concentration of commercial real estate loan commitments as a percentage of Tier 1 Capital. While loan commitments are presently near the upper internal concentration limit, we expect continued modest growth in our commercial real estate balances as loans fund, primarily in the multifamily and industrial loan portfolios.

Loans to Individuals

Loans to individuals include residential mortgage and personal loans. Residential mortgage loans provide funds for our customers to purchase or refinance their primary residence or to borrow against the equity in their home. These loans are secured by a first or second mortgage on the customer's primary residence. Personal loans consist primarily of loans to Wealth Management clients secured by the cash surrender value of insurance policies and marketable securities. Personal loans also include direct loans secured by and for the purchase of automobiles, recreational and marine equipment as well as unsecured loans. These loans are made in accordance with underwriting policies we believe to be conservative and are fully documented. Loans may be individually underwritten or credit scored based on size and other criteria. Credit scoring is assessed based on significant credit characteristics including credit history, residential and employment stability.

In general, we sell the majority of our conforming fixed-rate mortgage loan originations in the secondary market and retain the majority of our non-conforming and adjustable-rate mortgage loans. Our mortgage loan portfolio does not include payment option adjustable-rate mortgage loans or adjustable-rate mortgage loans with initial rates that are below market. Home equity loans are primarily first-lien and fully amortizing.

Residential mortgage loans guaranteed by U.S. government agencies have limited credit exposure because of the agency guarantee. This amount includes residential mortgage loans previously sold into GNMA mortgage pools that the Company may repurchase when certain defined delinquency criteria are met. Because of this repurchase right, the Company is deemed to have regained effective control over these loans and must include them on the Consolidated Balance Sheet.

Loans to individuals totaled $3.8 billion or 16% of the loan portfolio, an increase of $31 million compared to June 30, 2023. Approximately 91 percent of the loans in this segment are secured by collateral located within our geographical footprint. Loans for which the collateral location is less relevant, such as unsecured loans, are categorized by the borrower's primary location.

The Company secondarily evaluates loan portfolio performance based on the primary geographical market managing the loan. Loans attributed to a geographical market may not represent the location of the borrower or the collateral. All permanent mortgage loans serviced by our mortgage banking unit and held for investment by the Company are centrally managed by the Oklahoma market.

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Table 13 – Loans Managed by Primary Geographical Market

(In thousands)

	Sep. 30, 2023		June 30, 2023		Mar. 31, 2023		Dec. 31, 2022		Sep. 30, 2022
Texas:
Commercial	$	7,249,963	$	7,223,820	$	7,103,166	$	6,878,618	$	6,644,890
Commercial real estate	1,873,477		1,748,796		1,675,831		1,555,508		1,448,590
Loans to individuals	961,299		974,911		992,343		982,700		970,459
Total Texas	10,084,739		9,947,527		9,771,340		9,416,826		9,063,939
Oklahoma:
Commercial	3,384,627		3,251,547		3,178,934		3,382,577		3,108,608
Commercial real estate	601,087		573,559		574,708		582,109		608,856
Loans to individuals	2,100,974		2,079,311		2,049,472		2,077,124		2,054,362
Total Oklahoma	6,086,688		5,904,417		5,803,114		6,041,810		5,771,826
Colorado:
Commercial	2,219,460		2,179,473		2,148,066		2,149,199		2,117,181
Commercial real estate	710,552		683,973		646,537		613,912		565,057
Loans to individuals	227,569		223,200		231,368		241,902		237,981
Total Colorado	3,157,581		3,086,646		3,025,971		3,005,013		2,920,219
Arizona:
Commercial	1,173,491		1,177,778		1,115,973		1,124,289		1,103,000
Commercial real estate	1,014,151		926,750		881,465		860,947		850,319
Loans to individuals	260,282		242,102		240,556		229,872		225,981
Total Arizona	2,447,924		2,346,630		2,237,994		2,215,108		2,179,300
Kansas/Missouri:
Commercial	307,725		309,148		318,782		310,715		307,456
Commercial real estate	547,708		516,299		489,951		479,968		466,955
Loans to individuals	132,137		138,960		129,580		131,307		125,039
Total Kansas/Missouri	987,570		964,407		938,313		921,990		899,450
New Mexico:
Commercial	297,714		287,443		280,945		263,349		258,754
Commercial real estate	405,989		425,472		449,715		417,008		426,367
Loans to individuals	69,418		64,803		65,770		67,163		68,095
Total New Mexico	773,121		777,718		796,430		747,520		753,216
Arkansas:
Commercial	86,859		105,307		71,483		103,752		88,030
Commercial real estate	88,336		95,952		97,109		97,325		107,767
Loans to individuals	11,200		9,055		8,299		7,806		6,710
Total Arkansas	186,395		210,314		176,891		208,883		202,507
Total BOK Financial loans	$	23,724,018	$	23,237,659	$	22,750,053	$	22,557,150	$	21,790,457

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Off-Balance Sheet Commitments

We enter into certain off-balance sheet arrangements in the normal course of business as shown in Table 14. Loan commitments may be unconditional obligations to provide financing or conditional obligations that depend on the borrower's financial condition, collateral value or other factors. Standby letters of credit are unconditional commitments to guarantee the performance of our customer to a third party. Since some of these commitments are expected to expire before being drawn upon, the total commitment amounts do not necessarily represent future cash requirements.

We have off-balance sheet commitments related to certain residential mortgage loans sold into mortgage-backed securities as part of our mortgage banking activities. We retain off-balance sheet credit risk related to losses in excess of amounts guaranteed by the U.S. Department of Veterans Affairs ("VA").

We also have off-balance sheet credit risk related to certain residential mortgage loans primarily originated under community development loan programs that were sold to a U.S. government agency with full recourse prior to 2007. We are obligated to repurchase these loans for the life of these loans in the event of foreclosure for the unpaid principal and interest at the time of foreclosure. The majority of our conforming fixed rate loan originations are sold in the secondary market, and we only retain repurchase obligations under standard underwriting representations and warranties.

Table 14 – Off-Balance Sheet Credit Commitments

(In thousands)

	Sep. 30, 2023		June 30, 2023		Mar. 31, 2023		Dec. 31, 2022		Sep. 30, 2022
Loan commitments	$	14,404,610	$	14,979,253	$	15,119,984	$	15,424,431	$	14,585,566
Standby letters of credit	759,563		721,908		790,316		740,039		725,302
Unpaid principal balance of residential mortgage loans sold with recourse	40,369		42,041		43,510		44,742		46,199
Unpaid principal balance of residential mortgage loans transferred into mortgage-backed securities guaranteed by U.S. Dept. of Veterans Affairs	970,469		988,212		996,139		1,005,368		1,021,504

Customer Hedging Programs

We offer programs that permit our customers to hedge various risks, including fluctuations in energy, cattle and other agricultural product prices, interest rates and foreign exchange rates. Each of these programs work essentially the same way. Derivative contracts are executed between the customers and the Company. Offsetting contracts are executed between the Company and selected counterparties to minimize market risk due to changes in commodity prices, interest rates or foreign exchange rates. The counterparty contracts are identical to the customer contracts except for a fixed pricing spread or a fee paid to us as compensation for administrative costs, credit risk and profit.

The customer hedging programs create credit risk for potential amounts due to the Company from our customers and from the counterparties. Customer credit risk is monitored through existing credit policies and procedures. The effects of changes in commodity prices, interest rates or foreign exchange rates are evaluated across a range of possible scenarios to determine the maximum exposure we are willing to have individually to any customer. Customers may also be required to provide cash margin or other collateral in conjunction with our credit agreements to further limit our credit risk.

Counterparty credit risk is evaluated through existing policies and procedures. This evaluation considers the total relationship between BOK Financial and each of the counterparties. Individual limits are established by management, approved by Credit Administration and reviewed by the Asset/Liability Committee. Margin collateral is required if the exposure between the Company and any counterparty exceeds established limits. Based on declines in the counterparties' credit ratings, these limits may be reduced and additional margin collateral may be required.

A deterioration of the credit standing of one or more of the customers or counterparties to these contracts may result in BOK Financial recognizing a loss as the fair value of the affected contracts may no longer move in tandem with the offsetting contracts. This occurs if the credit standing of the customer or counterparty deteriorates such that either the fair value of underlying collateral no longer supports the contract or the customer or the counterparty's ability to provide margin collateral becomes impaired. Credit losses on customer derivatives reduce brokerage and trading revenue in the Consolidated Statements of Earnings.

- 25 -

Derivative contracts are carried at fair value. At September 30, 2023, the net fair values of derivative contracts, before consideration of cash margin, reported as assets under these programs totaled $594 million compared to $538 million at June 30, 2023. At September 30, 2023, the net fair value of our derivative contracts included $365 million for energy contracts, $161 million for interest rate swaps and $68 million for foreign exchange contracts. The aggregate net fair value of derivative contracts, before consideration of cash margin, held under these programs reported as liabilities totaled $582 million at September 30, 2023 and $526 million at June 30, 2023.

At September 30, 2023, total derivative assets were reduced by $197 million of cash collateral received from counterparties and total derivative liabilities were reduced by $242 million of cash collateral paid to counterparties related to instruments executed with the same counterparty under a master netting agreement. Derivative contracts executed with customers may be secured by non-cash collateral in conjunction with a credit agreement with that customer, such as proven producing oil and gas properties. Access to this collateral in an event of default is reasonably assured.

A table showing the notional and fair value of derivative assets and liabilities on both a gross and net basis is presented in Note 3 to the Consolidated Financial Statements.

The fair value of derivative contracts reported as assets under these programs, net of cash margin held by the Company, by category of debtor at September 30, 2023 follows in Table 15.

Table 15 – Fair Value of Derivative Contracts

(In thousands)

Customers	$	352,163
Banks and other financial institutions	44,498
Exchanges and clearing organizations	50
Fair value of customer risk management program asset derivative contracts, net	$	396,711

At September 30, 2023, our largest derivative exposure was to an energy customer for $44 million of net derivative positions, net of cash margin.

Our customer hedging program also introduces liquidity and capital risk. We are required to provide cash margin to certain counterparties when the net negative fair value of the contracts exceeds established limits. Also, changes in commodity prices affect the amount of regulatory capital we are required to hold as support for the fair value of our derivative assets. These risks are modeled as part of the management of these programs. Based on current prices, a decrease in market prices to an equivalent of $72.84 per barrel of oil would decrease the fair value of derivative assets by $210 million, with lending customers comprising the bulk of the assets. An increase in prices to an equivalent of $108.74 per barrel of oil would increase the fair value of derivative assets by $757 million as asset values rise faster than margin paid. Liquidity requirements of this program may also be affected by our credit rating. At September 30, 2023, a decrease in our credit rating to below investment grade would increase our obligation to post cash margin on existing contracts by approximately $10 million.

The fair value of our to-be-announced residential mortgage-backed securities and interest rate swap derivative contracts is affected by changes in interest rates. Based on our assessment as of September 30, 2023, changes in interest rates would not materially impact regulatory capital or liquidity needed to support this portion of our customer derivative program.

- 26 -

Summary of Credit Loss Experience

Table 16 – Summary of Credit Loss Experience

(Dollars in thousands)

	Three Months Ended
	Sep. 30, 2023			June 30, 2023			Mar. 31, 2023			Dec. 31, 2022			Sep. 30, 2022
Allowance for loan losses:
Beginning balance	$	262,714		$	249,460		235,704			241,768			241,114
Loans charged off	(10,593)			(8,049)			(3,667)			(17,807)			(1,766)
Recoveries of loans previously charged off	4,062			1,346			2,898			2,301			1,309
Net loans charged off	(6,531)			(6,703)			(769)			(15,506)			(457)
Provision for credit losses	15,931			19,957			14,525			9,442			1,111
Ending balance	$	272,114		$	262,714		$	249,460		$	235,704		$	241,768
Accrual for off-balance sheet credit risk from unfunded loan commitments:
Beginning balance	$	59,940		$	62,943		60,919			56,310			42,250
Provision for credit losses	(7,336)			(3,003)			2,024			4,609			14,060
Ending balance	$	52,604		$	59,940		$	62,943		$	60,919		$	56,310
Accrual for off-balance sheet credit risk associated with mortgage banking activities:
Beginning balance	$	4,443		$	4,381		4,904			3,885			4,003
Loans charged off	(7)			(16)			(35)			16			(52)
Provision for credit losses	(1,474)			78			(488)			1,003			(66)
Ending balance	$	2,962		$	4,443		$	4,381		$	4,904		$	3,885
Allowance for credit losses related to held-to-maturity (investment) securities:
Beginning balance	$	465		$	497		$	558		$	612		$	717
Provision for credit losses	(121)			(32)			(61)			(54)			(105)
Ending balance	$	344		$	465		$	497		$	558		$	612
Total provision for credit losses	$	7,000		$	17,000		$	16,000		$	15,000		$	15,000
Average loans by portfolio segment :
Commercial	$	14,527,676		$	14,316,474		$	14,046,237		$	13,846,339		$	13,508,325
Commercial real estate	5,172,876			4,896,230			4,757,362			4,488,091			4,434,650
Loans to individuals	3,713,756			3,676,350			3,672,648			3,641,574			3,656,257
Net charge-offs (annualized) to average loans	0.11		%	0.12		%	0.01		%	0.28		%	0.01		%
Net charge-offs (annualized) to average loans by portfolio segment:
Commercial	0.18		%	0.06		%	(0.06)		%	0.42		%	(0.02)		%
Commercial real estate	(0.07)		%	0.32		%	0.17		%	—		%	—		%
Loans to individuals	0.10		%	0.08		%	0.07		%	0.12		%	0.12		%
Recoveries to gross charge-offs	38.35		%	16.72		%	79.03		%	12.92		%	74.12		%
Provision for loan losses (annualized) to average loans	0.27		%	0.35		%	0.26		%	0.17		%	0.02		%
Allowance for loan losses to loans outstanding at period end	1.15		%	1.13		%	1.10		%	1.04		%	1.11		%
Accrual for unfunded loan commitments to loan commitments	0.37		%	0.40		%	0.42		%	0.39		%	0.39		%
Combined allowance for loan losses and accrual for off-balance sheet credit risk from unfunded loan commitments to loans outstanding at period end	1.37		%	1.39		%	1.37		%	1.31		%	1.37		%

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Allowance for Loan Losses and Accrual for Off-Balance Sheet Credit Risk from Unfunded Loan Commitments

Expected credit losses on assets carried at amortized cost are recognized over their expected lives based on models that measure the probability of default and loss given default over a 12-month reasonable and supportable forecast period. Models incorporate base case, downside and upside macroeconomic variables such as real gross domestic product ("GDP") growth, civilian unemployment rate, commercial real estate vacancy rates and West Texas Intermediate ("WTI") oil prices on a probability weighted basis. See Note 4 to the Consolidated Financial Statements for additional discussion of methodology of allowance for loan losses.

The provision for credit losses of $7.0 million in the third quarter of 2023 reflects modest improvement in the economic outlook and the impact of forecasted higher energy prices during the forecast period, offset by loan growth and the impact of a more challenging national commercial real estate environment, particularly related to office.

Non-pass grade loans, including loans especially mentioned, accruing substandard and nonaccruing loans, increased $23 million compared to June 30, 2023. Non-pass graded general business loans increased $36 million and non-pass grade energy loans were up $29 million, partially offset by a $23 million decrease in non-pass grade healthcare loans and an $18 million decrease in non-pass grade services loans. A summary of outstanding loan balances by risk grade is included in Note 4 to the Consolidated Financial Statements.

- 28 -

A summary of macroeconomic variables considered in developing our estimate of expected credit losses at September 30, 2023 follows:

	Base	Downside	Upside
Scenario probability weighting	50%	35%	15%
Economic outlook	The Russia-Ukraine conflict remains isolated. The federal funds target range of 5.25 percent to 5.50 percent is held flat for the remainder of the forecast period. Core inflation continues to improve from the peaks experienced in 2022, reaching 2.9 percent by the third quarter of 2024. Inflation pressures cause modest declines in real household income compared to pre-pandemic levels and a restrictive credit environment results in below-trend GDP growth. Job openings revert to more normalized levels and overall hiring levels decline, causing the national unemployment rate to modestly increase over the next four quarters.	The Russia-Ukraine conflict remains isolated. Higher levels of inflation force the Federal Reserve to adopt a more aggressive monetary policy compared to the base case scenario. This results in a target range of 6.25 percent to 6.50 percent by the third quarter of 2024. This, coupled with a restrictive credit environment, pushes the United States into a recession, with a contraction in economic activity and a sharp increase in the unemployment rate. Core inflation moderates from the peaks in 2022 but remains elevated through the forecast horizon, ending at 3.8 percent in the third quarter of 2024.	The Russia-Ukraine conflict remains isolated. The federal funds target range of 5.25 percent to 5.50 percent is held flat through the second quarter of 2024. There is one rate cut in the third quarter of 2024 bringing the target range down to 5.00 percent to 5.25 percent. Core inflation continues to improve from the peaks experienced in 2022 and reaches 2.5 percent by the third quarter of 2024. Labor force participants continue to re-enter the job market to help fill the elevated level of job openings. The increase in employment helps maintain household income above its pre-pandemic trend. This, coupled with the drawdown in savings, supports consumer spending and produces GDP growth consistent with pre-pandemic levels.
Macro-economic factors	–GDP is forecasted to grow by 1.3 percent over the next 12 months. –Civilian unemployment rate of 3.8 percent in the fourth quarter of 2023 increases to 4.2 percent by the third quarter of 2024. –WTI oil prices are projected to generally follow the NYMEX forward curve that existed at the end of September 2023 and are expected to average $82.81 per barrel over the next 12 months.	–GDP is forecasted to contract 2.0 percent over the next twelve months. –Civilian unemployment rate of 4.7 percent in the fourth quarter of 2023 increases to 6.1 percent in the third quarter of 2024. –WTI oil prices are projected to average $57.66 over the next 12 months, with a peak of $65.92 in the fourth quarter of 2023 and falling 21 percent over the following three quarters.	–GDP is forecasted to grow by 1.8 percent over the next 12 months. –Civilian unemployment rate of 3.7 percent in the fourth quarter of 2023 increases to 4.0 percent by the third quarter of 2024. –WTI oil prices are projected to average $86.74 per barrel over the next 12 months.

The probability weighting of our base case reasonable and supportable forecast remained at 50 percent in the third quarter of 2023, but the probability weighting of our downside case decreased to 35 percent from 40 percent in the prior quarter. The sensitivity to management's economic scenario weighting may be quantified by comparing the results of weighting each economic scenario at 100%. For example, compared to a 100% base case scenario, a 100% downside case would result in an additional $145 million in quantitative reserve, while a 100% upside case would result in $26 million less quantitative reserve at September 30, 2023. Such sensitivity calculations do not necessarily reflect the nature and extent of future changes in the related allowance.

At September 30, 2023, the allowance for loan losses totaled $272 million or 1.15 percent of outstanding loans. Excluding residential mortgage loans guaranteed by U.S. government agencies, the allowance for loan losses was 249 percent of nonaccruing loans. The combined allowance for loan losses and accrual for off-balance sheet credit risk from unfunded loan commitments was $325 million or 1.37 percent of outstanding loans and 298 percent of nonaccruing loans at September 30, 2023.

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The Company recorded a $17.0 million provision for credit losses in the second quarter of 2023. At June 30, 2023, the allowance for loan losses was $263 million or 1.13 percent of outstanding loans. Excluding residential mortgage loans guaranteed by U.S. government agencies, the allowance for loan losses was 218 percent of nonaccruing loans. The combined allowance for loan losses and accrual for off-balance sheet credit risk from unfunded loan commitments was $323 million or 1.39 percent of outstanding loans and 267 percent of nonaccruing loans.

Net Loans Charged Off

Net charge-offs of commercial loans were $6.5 million or 0.11 percent of average loans on an annualized basis in the third quarter. Charge-offs for the third quarter were primarily composed of a $4.6 million general business loan, a $2.2 million commercial real estate loan and a $1.5 million services loan. Net charge-offs of loans to individuals include deposit account overdraft losses.

Accrual for Off-Balance Sheet Credit Risk Associated with Mortgage Banking Activities

The accrual for off-balance sheet credit risk associated with mortgage banking activities includes consideration of credit risk related to certain residential mortgage loans sold into mortgage-backed securities in excess of amounts guaranteed by the U.S. Department of Veteran's Affairs ("VA") and mortgage loans originated under community development loan programs that were sold to a U.S. government agency with full recourse.

We use publicly available long-term national data to estimate total loss given default for our off-balance sheet credit risk related to losses in excess of amounts guaranteed by the VA. This result is combined with probability of default output from our mortgage servicing rights model to estimate total expected loss. Then, we estimate the VA's guarantee percentage to determine our portion of the credit risk. Qualitative adjustment may be used, if necessary.

Allowance for Credit Losses Related to Held-to-Maturity (Investment) Securities

The expected credit losses principles apply to all financial assets measured at cost, including our held-to-maturity (investment) debt securities portfolio. Our investment portfolio includes municipal and other tax-exempt securities and other debt securities. Expected credit losses for these assets are based on the probability of default and loss given default assumptions that align with similarly graded loans. Qualitative adjustment may be used, if necessary.

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Nonperforming Assets

As more fully described in Note 4 to the Consolidated Financial Statements, loans are generally classified as nonaccruing when it becomes probable that we will not collect the full contractual principal and interest. Accruing renegotiated loans guaranteed by U.S. government agencies represent residential mortgage loans that have been modified in troubled debt restructurings. Interest continues to accrue based on the modified terms of the loan and loans may be sold once they become eligible according to U.S. government agency guidelines. The Company adopted FASB Accounting Standards Update No. 2022-02, Financial Instruments - Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures, which eliminates designation of these loans as troubled debt restructurings effective January 1, 2023. Real estate and other repossessed assets are assets acquired in partial or total forgiveness of loans. The assets are carried at the lower of cost as determined by fair value at the date of foreclosure or current fair value, less estimated selling costs. A summary of nonperforming assets follows in Table 17:

Table 17 – Nonperforming Assets

(Dollars in thousands)

	Sep. 30, 2023			June 30, 2023			Mar. 31, 2023			Dec. 31, 2022			Sep. 30, 2022
Nonaccruing loans:
Commercial:
Healthcare	$	41,836		$	36,753		$	37,247		$	41,034		$	41,438
Services	2,820			4,541			8,097			16,228			27,315
Energy	19,559			20,037			127			1,399			4,164
General business	6,483			11,946			8,961			1,636			2,753
Total commercial	70,698			73,277			54,432			60,297			75,670
Commercial real estate	7,418			17,395			21,668			16,570			7,971
Loans to individuals:
Residential mortgage	30,954			29,973			29,693			29,791			30,066
Residential mortgage guaranteed by U.S. government agencies	10,436			11,473			14,302			15,005			16,957
Personal	79			133			200			134			136
Total loans to individuals	41,469			41,579			44,195			44,930			47,159
Total nonaccruing loans	119,585			132,251			120,295			121,797			130,800
Accruing renegotiated loans guaranteed by U.S. government agencies1	—			—			—			163,535			176,022
Real estate and other repossessed assets	3,753			4,227			12,651			14,304			29,676
Total nonperforming assets	$	123,338		$	136,478		$	132,946		$	299,636		$	336,498
Total nonperforming assets excluding those guaranteed by U.S. government agencies	$	112,902		$	125,005		$	118,644		$	121,096		$	143,519
Allowance for loan losses to nonaccruing loans2	249.31		%	217.52		%	235.36		%	220.71		%	212.37		%
Combined allowance for loan losses and accrual for off-balance sheet credit risk from unfunded loan commitments to nonaccruing loans2	297.50		%	267.15		%	294.74		%	277.76		%	261.83		%
Nonperforming assets to outstanding loans and repossessed assets	0.52		%	0.59		%	0.58		%	1.33		%	1.54		%
Nonperforming assets to outstanding loans and repossessed assets2	0.48		%	0.54		%	0.53		%	0.54		%	0.67		%
Nonaccruing loans to outstanding loans	0.50		%	0.57		%	0.53		%	0.54		%	0.60		%
Nonaccruing commercial loans to outstanding commercial loans	0.48		%	0.50		%	0.38		%	0.42		%	0.56		%
Nonaccruing commercial real estate loans to outstanding commercial real estate loans	0.14		%	0.35		%	0.45		%	0.36		%	0.18		%
Nonaccruing loans to individuals to outstanding loans to individuals2	0.86		%	0.85		%	0.86		%	0.86		%	0.88		%

1     The Company adopted FASB Accounting Standards Update No. 2022-02, Financial Instruments - Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures, which eliminates designation of these loans as troubled debt restructurings effective January 1, 2023.

2    Excludes residential mortgages guaranteed by U.S. government agencies.

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Nonaccruing loans decreased $13 million compared to June 30, 2023. Newly identified nonaccruing loans totaled $11 million, offset by $12 million of payments and $11 million of charge-offs. Nonaccruing commercial real estate loans decreased $10 million and nonaccruing general business loans decreased $5.5 million, partially offset by a $5.1 million increase in nonaccruing healthcare loans. The Company generally retains nonperforming assets to maximize potential recovery, which may cause future nonperforming assets to decrease more slowly.

A rollforward of nonperforming assets for the three and nine months ended September 30, 2023 follows in Table 18.

Table 18 – Rollforward of Nonperforming Assets

(In thousands)

	Three Months Ended
	September 30, 2023
	Nonaccruing Loans								Renegotiated Loans		Real Estate and Other Repossessed Assets		Total Nonperforming Assets
	Commercial		Commercial Real Estate		Loan to Individuals		Total
Balance, June 30, 2023	$	73,277	$	17,395	$	41,579	$	132,251	$	—	$	4,227	$	136,478
Additions	6,234		—		4,466		10,700		—		—		10,700
Payments	(2,044)		(7,739)		(2,497)		(12,280)		—		—		(12,280)
Charge-offs	(6,769)		(2,238)		(1,586)		(10,593)		—		—		(10,593)
Net gains (losses) and write-downs	—		—		—		—		—		(252)		(252)
Foreclosure of nonperforming loans	—		—		(142)		(142)		—		142		—
Foreclosure of loans guaranteed by U.S. government agencies	—		—		(472)		(472)		—		—		(472)
Proceeds from sales	—		—		—		—		—		(364)		(364)
Net transfers to nonaccruing loans	—		—		134		134		—		—		134
Return to accrual status	—		—		(13)		(13)		—		—		(13)
Balance, September 30, 2023	$	70,698	$	7,418	$	41,469	$	119,585	$	—	$	3,753	$	123,338
	Nine Months Ended
	September 30, 2023
	Nonaccruing Loans								Renegotiated Loans		Real Estate and Other Repossessed Assets		Total Nonperforming Assets
	Commercial		Commercial Real Estate		Loan to Individuals		Total
Balance, Dec. 31, 2022	$	60,297	$	16,570	$	44,930	$	121,797	$	163,535	$	14,304	$	299,636
Change in accounting standard	—		—		—		—		(163,535)		—		(163,535)
Additions	44,334		7,459		12,339		64,132		—		—		64,132
Payments	(23,797)		(8,165)		(7,782)		(39,744)		—		—		(39,744)
Charge-offs	(9,578)		(8,446)		(4,285)		(22,309)		—		—		(22,309)
Net gains (losses) and write-downs	—		—		—		—		—		1,209		1,209
Foreclosure of nonperforming loans	—		—		(367)		(367)		—		367		—
Foreclosure of loans guaranteed by U.S. government agencies	—		—		(4,015)		(4,015)		—		—		(4,015)
Proceeds from sales	—		—		—		—		—		(12,127)		(12,127)
Net transfers to nonaccruing loans	—		—		662		662		—		—		662
Return to accrual status	(558)		—		(13)		(571)		—		—		(571)
Balance, September 30, 2023	$	70,698	$	7,418	$	41,469	$	119,585	$	—	$	3,753	$	123,338

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We foreclose on loans guaranteed by U.S. government agencies in accordance with agency guidelines. Generally, these loans are not eligible for modification programs or have failed to comply with modified loan terms. Principal is guaranteed by agencies of the U.S. government, subject to limitations, and credit risk is limited. At foreclosure, these amounts are transferred to claims receivable accounts. These properties will be conveyed to the agencies once applicable criteria have been met. 

Real Estate and Other Repossessed Assets

Real estate and other repossessed assets totaled $3.8 million at September 30, 2023, composed primarily of $3.2 million of land for commercial real estate development. Real estate and other repossessed assets decreased $474 thousand compared to June 30, 2023.

Liquidity and Capital

Based on the average balances for the third quarter of 2023, approximately 67 percent of our funding was provided by deposit accounts, 20 percent from borrowed funds, 10 percent from equity and less than 1 percent from long-term subordinated debt. Our funding sources, which primarily include deposits and borrowings from the Federal Home Loan Banks and other banks, provide adequate liquidity to meet our operating needs.

Subsidiary Bank

Deposits and borrowed funds are the primary sources of liquidity for BOKF, NA, the wholly owned subsidiary bank of BOK Financial. We compete for retail and commercial deposits by offering a broad range of products and services and focusing on customer convenience. Retail deposit growth is supported through personal and small business checking, online bill paying services, mobile banking services, an extensive network of branch locations and ATMs and our ExpressBank call center. Commercial deposit growth is supported by offering treasury management and lockbox services. We also acquire brokered deposits when the cost of funds is advantageous to other funding sources.

Average deposits for the third quarter of 2023 totaled $33.3 billion, a $918 million increase compared to the second quarter of 2023. Demand deposits decreased $840 million while interest-bearing transaction account balances increased $1.0 billion. Time deposit balances increased $764 million.

Table 19 – Average Deposits by Line of Business

(In thousands)

	Three Months Ended
	Sep. 30, 2023		June 30, 2023		Mar. 31, 2023		Dec. 31, 2022		Sep. 30, 2022
Commercial Banking	$	15,098,038	$	14,822,093	$	15,861,285	$	16,832,244	$	17,966,661
Consumer Banking	7,936,186		7,986,674		8,248,541		8,617,085		8,812,884
Wealth Management	7,886,962		7,544,143		7,432,413		7,888,753		7,999,074
Subtotal	30,921,186		30,352,910		31,542,239		33,338,082		34,778,619
Funds Management and other	2,366,711		2,016,802		1,940,232		2,123,303		2,271,157
Total	$	33,287,897	$	32,369,712	$	33,482,471	$	35,461,385	$	37,049,776

Average Commercial Banking deposit balances increased $276 million compared to the second quarter of 2023. Interest-bearing transaction account balances increased $903 million while demand deposit balances decreased $661 million. Our Commercial deposit portfolio is highly diversified across industries and customers. The highest concentration by industry within our commercial deposit portfolio is with our energy customers representing 6 percent of our total deposits.

Average Consumer Banking deposit balances decreased $50 million compared to the prior quarter. Decreases of $170 million in interest-bearing transaction deposit balances and $65 million in demand deposit balances were partially offset by an increase of $235 million in time deposit balances.

Average Wealth Management deposits increased $343 million compared to the second quarter of 2023. Interest-bearing transaction account balances increased $303 million and time deposit balances increased $133 million while demand deposit balances decreased $93 million.

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Total brokered deposits were 3 percent of total deposits during the third quarter of 2023. Average interest-bearing transaction accounts for the third quarter included $326 million of brokered deposits, a $73 million increase over the second quarter of 2023. Average time deposits for the third quarter of 2023 included $733 million of brokered deposits, a $359 million increase over the second quarter of 2023. Period-end brokered interest-bearing transaction accounts decreased $74 million to $284 million at September 30, 2023, and brokered time deposits decreased $72 million to $688 million at September 30, 2023.

The distribution of our period end deposit account balances among principal markets follows in Table 20.

Table 20 – Period End Deposits by Principal Market Area

(In thousands)

	Sep. 30, 2023		June 30, 2023		Mar. 31, 2023		Dec. 31, 2022		Sep. 30, 2022
Oklahoma:
Demand	$	4,019,019	$	4,273,136	$	4,369,944	$	4,585,963	$	5,143,405
Interest-bearing:
Transaction	9,970,955		9,979,534		9,468,100		9,475,528		9,619,419
Savings	508,619		531,536		564,829		555,407		558,256
Time	2,019,749		1,945,916		942,787		794,002		776,306
Total interest-bearing	12,499,323		12,456,986		10,975,716		10,824,937		10,953,981
Total Oklahoma	16,518,342		16,730,122		15,345,660		15,410,900		16,097,386
Texas:
Demand	2,599,998		2,876,568		3,154,789		3,873,759		4,609,255
Interest-bearing:
Transaction	5,046,288		4,532,093		4,366,932		4,878,482		4,781,920
Savings	154,863		162,704		175,012		178,356		179,049
Time	436,218		377,424		321,774		356,538		343,015
Total interest-bearing	5,637,369		5,072,221		4,863,718		5,413,376		5,303,984
Total Texas	8,237,367		7,948,789		8,018,507		9,287,135		9,913,239
Colorado:
Demand	1,598,622		1,726,130		1,869,194		2,462,891		2,510,179
Interest-bearing:
Transaction	1,888,026		1,825,295		2,126,435		2,123,218		2,221,796
Savings	63,129		66,968		72,548		77,961		80,542
Time	185,030		148,840		128,583		135,043		151,064
Total interest-bearing	2,136,185		2,041,103		2,327,566		2,336,222		2,453,402
Total Colorado	3,734,807		3,767,233		4,196,760		4,799,113		4,963,581
New Mexico:
Demand	853,571		912,218		997,364		1,141,958		1,296,410
Interest-bearing:
Transaction	1,049,903		712,541		674,328		691,915		717,492
Savings	97,753		102,729		111,771		112,430		113,056
Time	217,535		179,548		137,875		133,625		142,856
Total interest-bearing	1,365,191		994,818		923,974		937,970		973,404
Total New Mexico	2,218,762		1,907,036		1,921,338		2,079,928		2,269,814

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	Sep. 30, 2023		June 30, 2023		Mar. 31, 2023		Dec. 31, 2022		Sep. 30, 2022
Arizona:
Demand	522,142		592,144		780,051		844,327		903,296
Interest-bearing:
Transaction	903,535		800,970		687,527		739,628		788,142
Savings	12,340		14,489		16,993		16,496		18,258
Time	36,689		31,248		27,755		24,846		26,704
Total interest-bearing	952,564		846,707		732,275		780,970		833,104
Total Arizona	1,474,706		1,438,851		1,512,326		1,625,297		1,736,400
Kansas/Missouri:
Demand	351,236		363,534		393,321		436,259		479,459
Interest-bearing:
Transaction	981,091		1,014,247		1,040,009		694,163		747,981
Savings	14,331		16,316		18,292		20,678		19,375
Time	22,437		16,176		13,061		12,963		13,258
Total interest-bearing	1,017,859		1,046,739		1,071,362		727,804		780,614
Total Kansas/Missouri	1,369,095		1,410,273		1,464,683		1,164,063		1,260,073
Arkansas:
Demand	29,635		38,818		42,312		50,180		43,111
Interest-bearing:
Transaction	57,381		43,301		71,158		56,181		123,273
Savings	2,898		3,195		3,228		3,083		3,098
Time	9,559		7,225		4,775		4,825		5,940
Total interest-bearing	69,838		53,721		79,161		64,089		132,311
Total Arkansas	99,473		92,539		121,473		114,269		175,422
Total BOK Financial deposits	$	33,652,552	$	33,294,843	$	32,580,747	$	34,480,705	$	36,415,915

Estimated uninsured deposits totaled $19.1 billion or 53 percent of our total deposits at September 30, 2023. In addition to insured deposits, we also hold $4.3 billion of collateralized deposits. Municipalities, Native American tribal governments and certain trust-related deposits are all required to be collateralized. Excluding the impact of collateralized deposits and deposits related to consolidated subsidiaries, our uninsured and uncollateralized deposit level is $13.7 billion or 41 percent of total deposits at September 30, 2023.

In addition to deposits, liquidity is provided primarily by federal funds purchased, securities repurchase agreements and Federal Home Loan Banks borrowings. Federal funds purchased consist primarily of unsecured, overnight funds acquired from other financial institutions. Funds are primarily purchased from bankers' banks and Federal Home Loan Banks from across the country. The largest source of wholesale federal funds purchased totaled $250 million at September 30, 2023. Securities repurchase agreements generally mature within 90 days and are secured by certain available for sale and trading securities. Federal Home Loan Banks borrowings are generally short-term and are secured by a blanket pledge of eligible collateral (generally unencumbered U.S. Treasury and agency mortgage-backed securities, 1-4 family residential mortgage loans, multifamily and other qualifying commercial real estate loans). Amounts borrowed from the Federal Home Loan Bank of Topeka averaged $6.9 billion during the quarter, compared to $5.2 billion in the second quarter of 2023.

At September 30, 2023, management estimates a total potential secured borrowing capacity of approximately $23.0 billion. This includes current available secured capacity of $18.7 billion from the use of programs available to U.S. banks from the Federal Home Loan Banks and Federal Reserve Banks and an estimated $4.3 billion of other sources that could be converted into additional secured capacity.

A summary of other borrowings for BOK Financial on a consolidated basis follows in Table 21.

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Table 21 – Borrowed Funds

(Dollars in thousands)

			Three Months Ended September 30, 2023							Three Months Ended June 30, 2023
	Sep. 30, 2023		Average Balance During the Quarter		Rate		Maximum Outstanding At Any Month End During the Quarter	June 30, 2023		Average Balance During the Quarter		Rate		Maximum Outstanding At Any Month End During the Quarter
Funds purchased	355,246		675,887		5.49	%	1,012,900	1,013,384		1,435,842		4.90	%	1,704,877
Repurchase agreements	2,367,752		2,023,140		4.59	%	2,367,752	4,433,480		2,235,152		4.37	%	4,433,480
Other borrowings:
Federal Home Loan Banks advances	6,175,000		6,941,575		5.48	%	7,875,000	3,750,000		5,244,340		5.12	%	5,100,000
GNMA repurchase liability	10,758		10,863		4.02	%	11,563	10,201		11,596		3.80	%	12,316
Other	15,886		15,871		5.02	%	15,886	16,855		19,355		2.84	%	23,775
Total other borrowings	6,201,644		6,968,309		5.48	%		3,777,056		5,275,291		5.12	%
Subordinated debentures1	131,152		131,151		7.02	%	131,152	131,154		131,153		6.79	%	131,154
Total other borrowed funds and subordinated debentures	$	9,055,794	$	9,798,487	5.32	%		$	9,355,074	$	9,077,438	4.92	%

1 Parent Company only.

BOKF, NA also has a liability related to the repurchase of certain delinquent residential mortgage loans previously sold into GNMA mortgage pools. Interest is payable monthly at rates contractually due to investors if delinquent loans are not repurchased from the GNMA mortgage pools.

Parent Company

At September 30, 2023, cash and interest-bearing cash and cash equivalents held by the parent company totaled $209 million. The primary sources of liquidity for BOK Financial are cash on hand and dividends from BOKF, NA. Dividends from the bank are limited by various banking regulations to net profits, as defined, for the year plus retained profits for the two preceding years. Dividends are further restricted by minimum capital requirements. At September 30, 2023, based upon the most restrictive limitations as well as management's internal capital policy, BOKF, NA could declare up to $394 million of dividends. Dividend constraints may be alleviated through increases in retained earnings, capital issuances or changes in risk weighted assets. Future losses or increases in required regulatory capital at the bank could affect its ability to pay dividends to the parent company.

Our equity capital at September 30, 2023 was $4.8 billion, a $50 million decrease compared to June 30, 2023. Net income less cash dividends paid increased equity $99 million during the third quarter of 2023. Changes in interest rates resulted in a $92 million decrease in accumulated other comprehensive income compared to June 30, 2023. We also repurchased $59 million of common stock, excluding a one percent excise tax on corporate stock repurchases, during the third quarter of 2023. Capital is managed to maximize long-term value to the shareholders. Factors considered in managing capital include projections of future earnings including expected benefits from lower federal income tax rates, asset growth and acquisition strategies, and regulatory and debt covenant requirements. Capital management may include subordinated debt or perpetual preferred stock issuance, share repurchase and stock and cash dividends.

On November 1, 2022, the board of directors authorized the Company to purchase up to five million common shares, subject to market conditions, securities law and other regulatory compliance limitations. As of September 30, 2023, the Company had repurchased 1,727,977 shares under this authorization. The Company repurchased 700,500 shares of common stock at an average price of $84.17 per share in the third quarter of 2023. We view share buybacks opportunistically, but within the context of maintaining our strong capital position.

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BOK Financial and BOKF, NA are subject to various capital requirements administered by federal agencies. Failure to meet minimum capital requirements can result in certain mandatory and possibly additional discretionary actions by regulators that could have a material impact on operations. These capital requirements include quantitative measures of assets, liabilities and off-balance sheet items. The capital standards are also subject to qualitative judgments by the regulators.

A summary of minimum capital requirements, including a capital conservation buffer follows in Table 22. A bank which falls below these levels, including the capital conservation buffer, would be subject to regulatory restrictions on capital distributions (including, but not limited to, dividends and share repurchases) and executive bonus payments.

In March 2020, in response to the impact on the financial markets by the COVID-19 pandemic, the banking agencies issued an interim final rule permitting banking organizations that implement the current expected credit loss ("CECL") model the option to delay for two years an estimate of the CECL methodology's effect on regulatory capital, followed by a three-year transition period. The estimate includes the implementation date adjustment as of January 1, 2020 plus an estimate of the impact of the change for a two year period following implementation of CECL. We elected to delay the regulatory capital impact of the transition in accordance with the interim final rule. Deferral of the impact of CECL added 6 basis points to the Company's Common equity Tier 1 capital at September 30, 2023.

Capital and other performance ratios for BOK Financial on a consolidated basis are presented in Table 22.

Table 22 – Capital and Performance Ratios

	Minimum Capital Requirement		Capital Conservation Buffer		Minimum Capital Requirement Including Capital Conservation Buffer		Sep. 30, 2023		June 30, 2023		Sep. 30, 2022
Capital:
Common equity Tier 1	4.50	%	2.50	%	7.00	%	12.06	%	12.13	%	11.80	%
Tier 1 capital	6.00	%	2.50	%	8.50	%	12.07	%	12.13	%	11.82	%
Total capital	8.00	%	2.50	%	10.50	%	13.16	%	13.24	%	12.81	%
Tier 1 Leverage	4.00	%	N/A		4.00	%	9.52	%	9.75	%	9.76	%
Average total equity to average assets							9.95	%	10.32	%	10.58	%
Tangible common equity ratio1							7.74	%	7.79	%	7.96	%
Adjusted common tangible equity ratio1							7.35	%	7.49	%	7.66	%
Performance Ratios:
Return on average equity							10.88	%	12.28	%	13.01	%
Return on average tangible common equity1							14.08	%	15.86	%	17.04	%

1    See Explanation and Reconciliation of Non-GAAP Measures following.

Off-Balance Sheet Arrangements

See Note 4 to the Consolidated Financial Statements for a discussion of the Company's significant off-balance sheet commitments.

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Explanation and Reconciliation of Non-GAAP Measures

Table 23 provides a reconciliation of the non-GAAP measures with financial measures defined by GAAP.

Table 23 – Non-GAAP Measures

(Dollars in thousands)

	Sep. 30, 2023			June 30, 2023			Mar. 31, 2023			Dec. 31, 2022			Sep. 30, 2022
Reconciliation of tangible common equity ratio and adjusted tangible common equity ratio:
Total shareholders' equity	$	4,814,019		$	4,863,854		$	4,874,786		$	4,682,649		$	4,509,934
Less: Goodwill and intangible assets, net	1,110,553			1,113,995			1,117,438			1,120,880			1,124,582
Tangible common equity	3,703,466			3,749,859			3,757,348			3,561,769			3,385,352
Add: Unrealized gain (loss) on investment securities, net	(246,395)			(189,152)			(140,947)			(167,477)			(165,206)
Add: Tax effect on unrealized gain (loss) on investment securities, net	57,949			44,486			33,149			39,196			38,665
Adjusted tangible common equity	$	3,515,020		$	3,605,193		$	3,649,550		$	3,433,488		$	3,258,811
Total assets	$	48,931,397		$	49,237,920		$	45,524,122		$	47,790,642		$	43,645,446
Less: Goodwill and intangible assets, net	1,110,553			1,113,995			1,117,438			1,120,880			1,124,582
Tangible assets	$	47,820,844		$	48,123,925		$	44,406,684		$	46,669,762		$	42,520,864
Tangible common equity ratio	7.74		%	7.79		%	8.46		%	7.63		%	7.96		%
Adjusted tangible common equity ratio	7.35		%	7.49		%	8.22		%	7.36		%	7.66		%
Reconciliation of return on average tangible common equity:
Total average shareholders' equity	$	4,902,119		$	4,941,352		$	4,837,567		$	4,613,929		$	4,771,123
Less: Average goodwill and intangible assets, net	1,112,217			1,115,652			1,119,123			1,122,680			1,126,440
Average tangible common equity	$	3,789,902		$	3,825,700		$	3,718,444		$	3,491,249		$	3,644,683
Net Income	$	134,495		$	151,308		$	162,368		$	168,429		$	156,510
Return on average tangible common equity	14.08		%	15.86		%	17.71		%	19.14		%	17.04		%
Reconciliation of pre-provision net revenue:
Net income before taxes	$	167,735		$	195,637		$	208,401		$	216,256		$	196,272
Provision for expected credit losses	7,000			17,000			16,000			15,000			15,000
Net income (loss) attributable to non-controlling interests	(16)			328			128			(37)			81
Pre-provision net revenue	$	174,751		$	212,309		$	224,273		$	231,293		$	211,191
Calculation of efficiency ratio:
Total other operating expense	$	324,313		$	318,673		$	305,812		$	318,456		$	294,751
Less: Amortization of intangible assets	3,474			3,474			3,391			3,736			3,943
Adjusted total other operating expense	$	320,839		$	315,199		$	302,421		$	314,720		$	290,808
Net interest revenue	$	300,896		$	322,261		$	352,348		$	352,626		$	316,325
Tax-equivalent adjustment	2,214			2,200			2,285			2,287			2,163
Tax-equivalent net interest revenue	303,110			324,461			354,633			354,913			318,488
Total other operating revenue	198,152			209,049			177,865			197,086			189,698
Less: Gain (loss) on available for sale securities, net	—			(3,010)			—			(3,988)			892
Adjusted revenue	$	501,262		$	536,520		$	532,498		$	555,987		$	507,294
Efficiency ratio	64.01		%	58.75		%	56.79		%	56.61		%	57.33		%

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	Sep. 30, 2023			June 30, 2023			Mar. 31, 2023			Dec. 31, 2022			Sep. 30, 2022
Information on net interest revenue and net interest margin excluding trading activities:
Net interest revenue	$	300,896		$	322,261		$	352,348		$	352,626		$	316,325
Less: Trading activities net interest revenue	(7,343)			(3,461)			70			(860)			4,478
Net interest revenue excluding trading activities	$	308,239		$	325,722		$	352,278		$	353,486		$	311,847
Tax-equivalent adjustment	2,214			2,200			2,285			2,287			2,163
Tax-equivalent net interest revenue excluding trading activities	$	310,453		$	327,922		$	354,563		$	355,773		$	314,010
Average total earning assets	$	44,012,300		$	42,731,533		$	40,781,257		$	39,285,300		$	38,527,860
Less: Average trading activities interest-earning assets	5,444,587			4,274,803			3,031,969			3,086,985			3,178,068
Average interest-earning assets excluding trading activities	$	38,567,713		$	38,456,730		$	37,749,288		$	36,198,315		$	35,349,792
Net interest margin on average interest-earning assets	2.69		%	3.00		%	3.45		%	3.54		%	3.24		%
Net interest margin on average trading activities interest-earning assets	(0.49)		%	(0.34)		%	—		%	(0.12)		%	0.53		%
Net interest margin on average interest-earning assets excluding trading activities	3.14		%	3.36		%	3.72		%	3.84		%	3.49		%

Explanation of Non-GAAP Measures

The tangible common equity ratio and return on average tangible common equity are primarily based on total shareholders' equity, which includes unrealized gains and losses on available for sale securities, less intangible assets and equity that do not benefit common shareholders. The adjusted tangible common equity ratio also includes unrealized gains and losses on the investment portfolio. These measures are valuable indicators of a financial institution's capital strength since they eliminate intangible assets from shareholders' equity and retain the effect of unrealized losses on securities and other components of accumulated other comprehensive income in shareholders' equity.

Pre-provision net revenue is a measure of revenue less expenses and is calculated before provision for credit losses and income tax expense. This financial measure is frequently used by investors and analysts and enables them to assess a company's ability to generate earnings to cover credit losses through a credit cycle. It also provides an additional basis for comparing the results of operations between periods by isolating the impact of the provision for credit losses, which can vary significantly between periods.

The efficiency ratio measures the Company's ability to use its assets and manage its liabilities effectively in the current period. Prior to the second quarter of 2023, the efficiency ratio did not exclude amortization of intangible assets and only included tax-equivalent net interest revenue and fees and commissions as part of total revenue. All prior periods were adjusted to conform with the current methodology.

Net interest revenue and net interest margin excluding trading activities remove the effect of trading activities on these metrics allowing management and investors to assess the performance of the Company's core lending and deposit activities without the associated volatility from trading activities.

Market Risk

Market risk is a broad term for the risk of economic loss due to adverse changes in the fair value of a financial instrument. These changes may be the result of various factors, including interest rates, foreign exchange rates, commodity prices or equity prices. Financial instruments that are subject to market risk can be classified either as held for trading or held for purposes other than trading. Market risk excludes changes in fair value due to the credit of the individual issuers of financial instruments.

BOK Financial is subject to market risk primarily through the effect of changes in interest rates on both its assets held for purposes other than trading and trading assets. The effects of other changes, such as foreign exchange rates, commodity prices or equity prices do not pose significant market risk to BOK Financial. BOK Financial has no material investments in assets that are affected by changes in foreign exchange rates or equity prices. Energy and agricultural product derivative contracts, which are affected by changes in commodity prices, are matched against offsetting contracts as previously discussed.

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The Asset/Liability Committee is responsible for managing market risk in accordance with policy limits established by the Board of Directors. The Committee monitors projected variation in net interest revenue, net income and economic value of equity due to specified changes in interest rates. These limits also set maximum levels for short-term borrowings, short-term assets, public funds and brokered deposits and establish minimum levels for unpledged assets, among other things. Further, the Board has approved market risk limits for fixed income trading, mortgage pipeline and mortgage servicing assets inclusive of economic hedge benefits. Exposure is measured daily and compliance is reviewed monthly. Deviations from the Board approved limits, which periodically occur throughout the reporting period, may require management to develop and execute plans to reduce exposure. These plans are subject to escalation to and approval by the Board.

The simulations used to manage market risk are based on numerous assumptions regarding the effects of changes in interest rates on the timing and extent of repricing characteristics, future cash flows and customer behavior. These assumptions are inherently uncertain and, as a result, models cannot precisely estimate or precisely predict the impact of higher or lower interest rates. Actual results will differ from simulated results due to timing, magnitude and frequency of interest rate changes, market conditions and management strategies, among other factors.

Interest Rate Risk – Other than Trading

As previously noted in the Net Interest Revenue section of this report, management has implemented strategies to manage the Company's balance sheet exposure to changes in interest rates over a twelve-month period within established policy limits. The effectiveness of these strategies in managing the overall interest rate risk is evaluated through the use of an asset/liability model. BOK Financial performs a sensitivity analysis to identify more dynamic interest rate risk exposures, including embedded option positions, on net interest revenue. A simulation model is used to estimate the effect of changes in interest rates on our performance across multiple interest rate scenarios. Our current internal policy limit for net interest revenue variation due to a 200 basis point parallel change in market interest rates over twelve months is a maximum decline of 6.5 percent. Management also reviews alternative rate changes and time periods.

The U.K. Financial Conduct Authority ("FCA") ceased publication of the principal tenors of the U.S. dollar London Interbank Offered Rate ("LIBOR") immediately following the final publication on June 30, 2023. The Company ceased production of new LIBOR-based exposure as of December 31, 2021 and now offers floating rate products in various alternative reference rates, with the majority of volume being observed thus far in term rate versions of the Secured Overnight Financing Rate ("SOFR"). Before the June 30, 2023 deadline, the Company mitigated its remaining LIBOR exposure, with any outstanding or committed exposure being proactively moved to an alternative rate or falling back per the terms of their contract or as per the LIBOR Act.

The Company's primary interest rate exposures include the Federal Funds rate, which affects short-term borrowings, and the prime lending rate, SOFR, which is the basis for much of the variable rate loan pricing. Additionally, residential mortgage rates directly affect the prepayment speeds for residential mortgage-backed securities and mortgage servicing rights. Derivative financial instruments and other financial instruments used for purposes other than trading are included in this simulation. In addition, the impact on the level and composition of demand deposit accounts and other core deposit balances resulting from a significant increase in short-term market interest rates and the overall interest rate environment is likely to be material. The simulation incorporates assumptions regarding the effects of such changes based on a combination of historical analysis and expected behavior. The impact of planned growth and new business activities is factored into the simulation model.

The interest rate sensitivity in Table 24 indicates management's estimation of the impact of rate changes on net interest revenue. Should deposit costs be 10 percent more sensitive to changes in rates, the variation in net interest revenue over the next twelve months would be (4.73) percent, or ($60.4 million) for the 200 basis point increase scenario. Alternatively, should deposit funding costs be 10 percent less sensitive to changes in rates, the variation in net interest revenue over the next twelve months would be (2.33) percent, or ($29.7 million) for the 200 basis point increase scenario.

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Table 24 – Interest Rate Sensitivity

(Dollars in thousands)

	Sep. 30, 2023												June 30, 2023
	200 bp Increase			100 bp Increase			100 bp Decrease			200 bp Decrease			200 bp Increase			100 bp Increase			100 bp Decrease			200 bp Decrease
Anticipated impact over the next twelve months on net interest revenue	$	(45,100)		$	(16,700)		$	(15,900)		$	(17,700)		$	(22,800)		$	(1,100)		$	(32,000)		$	(49,700)
	(3.53)		%	(1.31)		%	(1.24)		%	(1.38)		%	(1.64)		%	(0.08)		%	(2.30)		%	(3.57)		%
Anticipated impact over months twelve through twenty-four	$	(50,600)		$	(13,500)		$	(68,000)		$	(108,000)		$	(13,800)		$	19,900		$	(100,200)		$	(171,700)
	(3.55)		%	(0.94)		%	(4.77)		%	(7.57)		%	(0.90)		%	1.30		%	(6.52)		%	(11.18)		%

BOK Financial is also subjected to market risk through changes in the fair value of mortgage servicing rights. Changes in the fair value of mortgage servicing rights are highly dependent on changes in primary mortgage rates offered to borrowers, intermediate-term interest rates that affect the value of custodial funds, and assumptions about servicing revenues, servicing costs and discount rates. As primary mortgage rates increase, prepayment speeds slow and the value of our mortgage servicing rights increases. As primary mortgage rates fall, prepayment speeds increase and the value of our mortgage servicing rights decreases.

We maintain a portfolio of financial instruments which may include debt securities issued by the U.S. government or its agencies and interest rate derivative contracts, held as an economic hedge of the changes in the fair value of our mortgage servicing rights. Composition of this portfolio will change based on our assessment of market risk. Changes in the fair value of residential mortgage-backed securities are highly dependent on changes in secondary mortgage rates required by investors, and interest rate derivative contracts are highly dependent on changes in other market interest rates. While primary and secondary mortgage rates generally move in the same direction, the spread between them may widen and narrow due to market conditions and government intervention. Changes in the forward-looking spread between the primary and secondary rates can cause significant earnings volatility.

Management performs a stress test to measure market risk due to changes in interest rates inherent in its MSR portfolio and hedges. The stress test shocks applicable interest rates up and down 50 basis points and calculates an estimated change in fair value, net of economic hedging activity, that may result. The Board has approved a $20 million market risk limit for mortgage servicing rights, net of economic hedges.

Table 25 – MSR Asset and Hedge Sensitivity Analysis

(In thousands)

	Sep. 30, 2023				June 30, 2023
	Up 50 bp		Down 50 bp		Up 50 bp		Down 50 bp
MSR Asset	$	5,164	$	(6,738)	$	6,927	$	(8,919)
MSR Hedge	(6,672)		6,817		(8,116)		8,291
Net Exposure	(1,508)		79		(1,189)		(628)

Trading Activities

The Company bears market risk by originating residential mortgages held for sale ("RMHFS"). RMHFS are generally outstanding for 60 to 90 days, which represents the typical period from commitment to originate a loan to sale of the closed loan to an investor. Primary mortgage interest rate changes during this period affect the value of RMHFS commitments and loans. We use forward sale contracts to mitigate market risk on all closed mortgage loans held for sale and on an estimate of mortgage loan commitments that are expected to result in closed loans.

A variety of methods are used to monitor market risk of mortgage origination activities. These methods include daily marking of all positions to market value, independent verification of inventory pricing, and revenue sensitivity limits.

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Management performs a stress test to measure market risk due to changes in interest rates inherent in the mortgage production pipeline. The stress test shocks applicable interest rates up and down 50 basis points and calculates an estimated change in fair value, net of economic hedging activity that may result. The Board has approved a $7 million market risk limit for the mortgage production pipeline, net of forward sale contracts.

Table 26 – Mortgage Pipeline Sensitivity Analysis

(In thousands)

	Three Months Ended								Nine Months Ended September 30,
	Sep. 30, 2023				June 30, 2023				2023				2022
	Up 50 bp		Down 50 bp		Up 50 bp		Down 50 bp		Up 50 bp		Down 50 bp		Up 50 bp		Down 50 bp
Average1	$	(54)	$	(56)	$	(96)	$	(57)	$	(76)	$	(43)	$	(77)	$	(226)
Low2	49		12		—		52		49		61		381		91
High3	(153)		(115)		(158)		(168)		(186)		(168)		(402)		(779)
Period End	(7)		(41)		(88)		(99)		(7)		(41)		(8)		(115)

1    Average represents the simple average of each daily value observed during the reporting period.

2    Low represents least risk of loss in fair value measured as the smallest negative value or the largest positive value observed daily during the reporting period.

3    High represents the greatest risk of loss in fair value measured as the largest negative value or the smallest positive value observed daily during the reporting period.

BOK Financial enters into trading activities both as an intermediary for customers and for its own account. As an intermediary, we take positions in securities, generally residential mortgage-backed securities, government agency securities and municipal bonds. These securities are purchased for resale to customers, which include individuals, corporations, foundations and financial institutions. On a limited basis, we may also take trading positions in U.S. Treasury securities, residential mortgage-backed securities, and municipal bonds to enhance returns on securities portfolios. Both of these activities involve interest rate risk, liquidity risk and price risk.

A variety of methods are used to monitor and manage the market risk of trading activities. These methods include daily marking of all positions to market value, independent verification of inventory pricing, and position limits for each trading activity. Risk management tools include Value at Risk ("VaR"), stress testing and sensitivity analysis. Economic hedges in either the futures or cash markets may be used to reduce the risk associated with some trading programs. Basis risk can result when trading asset values and the instruments used to hedge them move at different rates.

VaR measures the potential loss of a given position or portfolio of positions at a specified confidence level and time horizon. BOK Financial utilizes a historical VaR methodology to measure and aggregate risks across its covered trading positions. For Market Risk Rule purposes, the Company calculates VaR using a historical simulation approach and measures the potential trading losses using a 10-day holding period and a 99% confidence level.

Due to inherent limitations of the VaR methodology, including its reliance on past market behavior, which might not be indicative of future market performance, VaR is only one of several tools used to measure and manage market risk. Other tools used to actively manage market risk include stress testing ("Stressed VaR" or "SVaR") and sensitivity analysis.

Stressed VaR is calculated using the same internal models as used for the VaR-based measure. Stressed VaR is calculated over a ten-day holding period at a one-tail, 99% confidence level and employs a historical simulation approach based on a continuous twelve-month historical window selected to reflect a period of significant financial stress for the Company's trading portfolio.

The trading portfolio's VaR and Stressed VaR profiles are influenced by a variety of factors, including the size and composition of the portfolio, market volatility, and the correlation between different positions. A portfolio of trading positions is typically less risky than the sum of the risk from each of the individual sub-portfolios because, under normal market conditions, risk within each category partially offsets the exposure to other risk categories. Table 27 below summarizes certain VaR and Stressed VaR based measures for the three months ended September 30, 2023, June 30, 2023, September 30, 2022 and June 30, 2022.

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Table 27 – VaR and SVaR Measures

(In thousands)

	Three Months Ended								Three Months Ended
	Sep. 30, 2023				June 30, 2023				Sep. 30, 2022				June 30, 2022
	10 day 99% VaR		10 day 99% SVaR		10 day 99% VaR		10 day 99% SVaR		10 day 99% VaR		10 day 99% SVaR		10 day 99% VaR		10 day 99% SVaR
Average1	$	5,954	$	6,118	$	4,429	$	7,239	$	2,644	$	7,555	$	6,070	$	12,619
Low	3,893		4,027		3,046		4,171		1,044		4,051		2,612		5,820
High	9,312		9,312		7,913		14,861		5,930		14,030		11,583		25,184
Period End	6,455		6,455		5,863		5,863		1,584		5,478		3,386		8,220

1    Average represents the simple average of each daily value observed during the reporting period.

The Company monitors the accuracy of internal VaR models and modeling processes by back-testing model performance. The Company updates historical data used by the VaR model on a regular basis, and model validators independent of business lines perform regular validations to access model input, processing, and reporting components. These models are required to be independently validated and approved prior to implementation.

Limit Structure

Beyond VaR and SVaR described above, Management also performs a sensitivity analysis to measure market risk from changes in interest rates on its trading portfolio. Applicable interest rates are shocked up and down 50 basis points, calculating an estimated change in fair value, net of economic hedging activity that may result. The Board has approved an $11 million market risk limit for the trading portfolio, net of economic hedges.

Table 28 – Trading Sensitivity Analysis

(In thousands)

	Three Months Ended								Nine Months Ended September 30,
	Sep. 30, 2023				June 30, 2023				2023				2022
	Up 50 bp		Down 50 bp		Up 50 bp		Down 50 bp		Up 50 bp		Down 50 bp		Up 50 bp		Down 50 bp
Average1	$	(3,644)	$	4,517	$	(602)	$	1,452	$	(1,169)	$	1,810	$	571	$	750
Low2	620		8,955		4,279		6,202		4,513		8,955		8,643		12,277
High3	(8,223)		573		(4,758)		(3,445)		(8,223)		(4,538)		(11,253)		(6,325)
Period End	(4,745)		4,983		(3,693)		4,886		(4,745)		4,983		983		(504)

1    Average represents the simple average of each daily value observed during the reporting period.

2    Low represents least risk of loss in fair value measured as the smallest negative value or the largest positive value observed daily during the reporting period.

3    High represents the greatest risk of loss in fair value measured as the largest negative value or the smallest positive value observed daily during the reporting period.

Model Risk Management

BOK Financial has an internal independent Model Risk Management staff that validates models to verify they are conceptually sound, computationally accurate, are performing as expected, and are in line with their intended use. Model Risk Management staff also enforces the Company's model risk governance program that defines roles and responsibilities, including the authority to levy findings requiring remediation and to restrict model usage.

Model Validation

Model validation staff maintain independence from both the developers and users of the models. Models are validated through an evaluation process that assesses the data, theory, implementation, outcomes, and governance of each scenario. Each model receives a model risk score, which determines the frequency and scope of validation activities. Validations comprise an assessment of model performance as well as a model's potential limitations given its particular assumptions or weaknesses. Based on the results of the review, the team determines whether the use case for the model is appropriate. The ultimate validation results may require remediation actions from the business line. Model validation results are communicated with one of the following three outcomes: "Approved for use," "Approved with findings," or "Unapproved."

- 43 -

Controls and Procedures

As required by Rule 13a-15(b), BOK Financial's management, including the Chief Executive Officer and Chief Financial Officer, conducted an evaluation as of the end of the period covered by their reports, of the effectiveness of the Company's disclosure controls and procedures as defined in Exchange Act Rule 13a-15(e). Based on that evaluation, the Chief Executive Officer and Chief Financial Officer concluded that the disclosure controls and procedures were effective as of the end of the period covered by this report. As required by Rule 13a-15(d), BOK Financial's management, including the Chief Executive Officer and Chief Financial Officer, also conducted an evaluation of the Company's internal controls over financial reporting to determine whether any changes occurred during the quarter covered by this report that have materially affected, or are reasonably likely to materially affect, the Company's internal controls over financial reporting. Based on that evaluation, there has been no such change during the quarter covered by this report.

Forward-Looking Statements

This report contains forward-looking statements that are based on management's beliefs, assumptions, current expectations, estimates and projections about BOK Financial Corporation, the financial services industry, and the economy generally and the related responses of the government, consumers, and others, on our business, financial condition and results of operations. Words such as "anticipates," "believes," "estimates," "expects," "forecasts," "plans," "projects," "will," "intends," variations of such words and similar expressions are intended to identify such forward-looking statements. Management judgments relating to and discussion of the provision and allowance for credit losses, allowance for uncertain tax positions, accruals for loss contingencies and valuation of mortgage servicing rights involve judgments as to expected events and are inherently forward-looking statements. Assessments that acquisitions and growth endeavors will be profitable are necessary statements of belief as to the outcome of future events based in part on information provided by others which BOK Financial has not independently verified. These various forward-looking statements are not guarantees of future performance and involve certain risks, uncertainties, and assumptions which are difficult to predict with regard to timing, extent, likelihood and degree of occurrence. Therefore, actual results and outcomes may materially differ from what is expected, implied or forecasted in such forward-looking statements. Internal and external factors that might cause such a difference include, but are not limited to changes in government, consumer or business responses to changes in commodity prices, interest rates and interest rate relationships, inflation, demand for products and services, the degree of competition by traditional and nontraditional competitors, changes in banking regulations, tax laws, prices, levies and assessments, the impact of technological advances, and trends in customer behavior as well as their ability to repay loans. BOK Financial and its affiliates undertake no obligation to update, amend or clarify forward-looking statements, whether as a result of new information, future events, or otherwise.

Annualized, pro forma, projected and estimated numbers are used for illustrative purpose only, are not forecasts and may not reflect actual results.

In this report we may sometimes use non-GAAP financial measures. Please note that although non-GAAP financial measures provide useful insight to analysts, investors and regulators, they should not be considered in isolation or relied upon as a substitute for analysis using GAAP measures. If applicable, we provide GAAP reconciliations for non-GAAP financial measures.

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Consolidated Statements of Earnings (Unaudited)
(In thousands, except share and per share data)	Three Months Ended				Nine Months Ended
	September 30,				September 30,
Interest revenue	2023		2022		2023		2022
Loans	$	425,662	$	264,350	$	1,192,714	$	646,738
Residential mortgage loans held for sale	1,234		1,684		3,305		4,637
Trading securities	65,221		22,720		147,051		86,653
Investment securities	8,276		9,108		25,790		14,947
Available for sale securities	99,124		58,779		282,449		175,383
Fair value option securities	552		286		7,561		1,214
Restricted equity securities	8,776		2,703		21,013		5,194
Interest-bearing cash and cash equivalents	8,199		3,520		24,257		5,730
Total interest revenue	617,044		363,150		1,704,140		940,496
Interest expense
Deposits	184,808		34,715		416,748		56,175
Borrowed funds	129,019		10,433		305,278		21,115
Subordinated debentures	2,321		1,677		6,609		4,452
Total interest expense	316,148		46,825		728,635		81,742
Net interest revenue	300,896		316,325		975,505		858,754
Provision for credit losses	7,000		15,000		40,000		15,000
Net interest revenue after provision for credit losses	293,896		301,325		935,505		843,754
Other operating revenue
Brokerage and trading revenue	62,312		61,006		179,714		77,970
Transaction card revenue	26,387		25,974		78,011		77,130
Fiduciary and asset management revenue	52,256		50,190		155,910		146,427
Deposit service charges and fees	27,676		28,703		80,744		84,207
Mortgage banking revenue	13,356		11,282		42,864		39,300
Other revenue	15,865		15,479		47,085		38,608
Total fees and commissions	197,852		192,634		584,328		463,642
Other gains (losses), net	1,474		979		16,343		(8,304)
Loss on derivatives, net	(9,010)		(17,009)		(18,513)		(77,559)
Loss on fair value option securities, net	(203)		(4,368)		(5,323)		(17,790)
Change in fair value of mortgage servicing rights	8,039		16,570		11,241		83,165
Gain (loss) on available for sale securities, net	—		892		(3,010)		3,017
Total other operating revenue	198,152		189,698		585,066		446,171
Other operating expense
Personnel	190,791		170,348		563,588		484,499
Business promotion	6,958		6,127		23,167		18,965
Charitable contributions to BOKF Foundation	23		—		1,165		—
Professional fees and services	13,224		14,089		39,049		37,977
Net occupancy and equipment	32,583		29,296		91,147		87,640
Insurance	7,996		4,306		22,285		13,317
Data processing and communications	45,672		41,743		135,781		122,859
Printing, postage and supplies	3,760		4,349		11,381		11,967
Amortization of intangible assets	3,474		3,943		10,339		11,956
Mortgage banking costs	8,357		9,504		22,439		26,818
Other expense	11,475		11,046		28,457		30,026
Total other operating expense	324,313		294,751		948,798		846,024
Net income before taxes	167,735		196,272		571,773		443,901
Federal and state income taxes	33,256		39,681		123,162		92,000
Net income	134,479		156,591		448,611		351,901
Net income (loss) attributable to non-controlling interests	(16)		81		440		57
Net income attributable to BOK Financial Corporation shareholders	$	134,495	$	156,510	$	448,171	$	351,844
Earnings per share:
Basic	$	2.04	$	2.32	$	6.74	$	5.18
Diluted	$	2.04	$	2.32	$	6.74	$	5.18
Average shares used in computation:
Basic	65,548,307		67,003,199		65,955,294		67,409,789
Diluted	65,548,307		67,004,623		65,955,294		67,411,222
Dividends declared per share	$	0.54	$	0.53	$	1.62	$	1.59

See accompanying notes to consolidated financial statements.

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Consolidated Statements of Comprehensive Income (Unaudited)
(In thousands, except share and per share data)
	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2023		2022		2023		2022
Net income	$	134,479	$	156,591	$	448,611	$	351,901
Other comprehensive income (loss) before income taxes:
Net change in unrealized gain (loss)	(135,614)		(412,084)		(171,977)		(1,293,661)
Reclassification adjustments included in earnings:
Interest revenue, Investment securities	14,912		21,675		46,996		24,130
Operating expense, Personnel	—		(3,483)		—		(3,483)
Loss (gain) on available for sale securities, net	—		(892)		3,010		(3,017)
Other comprehensive income (loss) before income taxes	(120,702)		(394,784)		(121,971)		(1,276,031)
Federal and state income taxes	(28,389)		(92,467)		(29,941)		(298,715)
Other comprehensive income (loss), net of income taxes	(92,313)		(302,317)		(92,030)		(977,316)
Comprehensive income (loss)	42,166		(145,726)		356,581		(625,415)
Comprehensive income (loss) attributable to non-controlling interests	(16)		81		440		57
Comprehensive income (loss) attributable to BOK Financial Corp. shareholders	$	42,182	$	(145,807)	$	356,141	$	(625,472)

See accompanying notes to consolidated financial statements.

- 46 -

Consolidated Balance Sheets

(In thousands, except share data)

	Sep. 30, 2023		Dec. 31, 2022
	(Unaudited)		(Footnote 1)
Assets
Cash and due from banks	$	854,161	$	943,810
Interest-bearing cash and cash equivalents	520,774		457,906
Trading securities	4,748,101		4,464,161
Investment securities, net of allowance (fair value: September 30, 2023 – $2,052,367; December 31, 2022 – $2,346,768)	2,298,418		2,513,687
Available for sale securities	11,906,647		11,493,860
Fair value option securities	20,215		296,590
Restricted equity securities	435,112		299,651
Residential mortgage loans held for sale	72,489		75,272
Loans	23,724,018		22,557,150
Allowance for loan losses	(272,114)		(235,704)
Loans, net of allowance	23,451,904		22,321,446
Premises and equipment, net	616,439		565,175
Receivables	255,164		273,815
Goodwill	1,044,749		1,044,749
Intangible assets, net	65,804		76,131
Mortgage servicing rights	311,382		277,608
Real estate and other repossessed assets, net of allowance (September 30, 2023 – $4,247; December 31, 2022 – $10,115)	3,753		14,304
Derivative contracts, net	546,109		880,343
Cash surrender value of bank-owned life insurance	406,623		406,751
Receivable on unsettled securities sales	28,707		31,004
Other assets	1,344,846		1,354,379
Total assets	$	48,931,397	$	47,790,642
Liabilities and Equity
Liabilities:
Non-interest bearing demand deposits	$	9,974,223	$	13,395,337
Interest-bearing deposits:
Transaction	19,897,179		18,659,115
Savings	853,933		964,411
Time	2,927,217		1,461,842
Total deposits	33,652,552		34,480,705
Funds purchased and repurchase agreements	2,722,998		2,270,377
Other borrowings	6,201,644		4,736,908
Subordinated debentures	131,152		131,205
Accrued interest, taxes and expense	244,105		296,870
Derivative contracts, net	403,947		554,900
Due on unsettled securities purchases	235,473		147,470
Other liabilities	522,318		484,849
Total liabilities	44,114,189		43,103,284
Shareholders' equity:
Common stock ($0.00006 par value; 2,500,000,000 shares authorized; shares issued and outstanding: September 30, 2023 – 76,588,230; December 31, 2022 – 76,423,345)	5		5
Capital surplus	1,404,668		1,390,395
Retained earnings	5,164,597		4,824,164
Treasury stock (shares at cost: September 30, 2023 – 10,923,390; December 31, 2022 – 9,464,711)	(826,266)		(694,960)
Accumulated other comprehensive income (loss)	(928,985)		(836,955)
Total shareholders' equity	4,814,019		4,682,649
Non-controlling interests	3,189		4,709
Total equity	4,817,208		4,687,358
Total liabilities and equity	$	48,931,397	$	47,790,642

See accompanying notes to consolidated financial statements.

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Consolidated Statements of Changes in Equity (Unaudited)

(In thousands)

	Common Stock			Capital Surplus		Retained Earnings		Treasury Stock			Accumulated Other Comprehensive Income (Loss)		Total Shareholders' Equity		Non- Controlling Interests		Total Equity
	Shares	Amount						Shares	Amount
Balance, June 30, 2023	76,592	$	5	$	1,401,509	$	5,065,733	10,223	$	(766,721)	$	(836,672)	$	4,863,854	$	3,543	$	4,867,397
Net income (loss)	—	—		—		134,495		—	—		—		134,495		(16)		134,479
Other comprehensive loss	—	—		—		—		—	—		(92,313)		(92,313)		—		(92,313)
Repurchase of common stock	—	—		—		—		700	(59,545)		—		(59,545)		—		(59,545)
Share-based compensation plans:
Non-vested shares awarded,      net	(4)	—		—		—		—	—		—		—		—		—
Vesting of non-vested      shares	—	—		—		—		—	—		—		—		—		—
Share-based compensation	—	—		3,159		—		—	—		—		3,159		—		3,159
Cash dividends on common      stock	—	—		—		(35,631)		—	—		—		(35,631)		—		(35,631)
Capital calls and distributions,      net	—	—		—		—		—	—		—		—		(338)		(338)
Balance, September 30, 2023	76,588	$	5	$	1,404,668	$	5,164,597	10,923	$	(826,266)	$	(928,985)	$	4,814,019	$	3,189	$	4,817,208
Balance, December 31, 2022	76,423	$	5	$	1,390,395	$	4,824,164	9,465	$	(694,960)	$	(836,955)	$	4,682,649	$	4,709	$	4,687,358
Net income (loss)	—	—		—		448,171		—	—		—		448,171		440		448,611
Other comprehensive loss	—	—		—		—		—	—		(92,030)		(92,030)		—		(92,030)
Repurchase of common stock	—	—		—		—		1,413	(126,611)		—		(126,611)		—		(126,611)
Share-based compensation      plans:
Non-vested shares awarded,      net	165	—		—		—		—	—		—		—		—		—
Vesting of non-vested      shares	—	—		—		—		45	(4,695)		—		(4,695)		—		(4,695)
Share-based compensation	—	—		14,273		—		—	—		—		14,273		—		14,273
Cash dividends on common      stock	—	—		—		(107,738)		—	—		—		(107,738)		—		(107,738)
Capital calls and distributions,      net	—	—		—		—		—	—		—		—		(1,960)		(1,960)
Balance, September 30, 2023	76,588	$	5	$	1,404,668	$	5,164,597	10,923	$	(826,266)	$	(928,985)	$	4,814,019	$	3,189	$	4,817,208

- 48 -

	Common Stock			Capital Surplus		Retained Earnings		Treasury Stock			Accumulated Other Comprehensive Income (Loss)		Total Shareholders' Equity		Non- Controlling Interests		Total Equity
	Shares	Amount						Shares	Amount
Balance, June 30, 2022	76,408	$	5	$	1,381,676	$	4,570,837	8,602	$	(612,551)	$	(602,628)	$	4,737,339	$	4,203	$	4,741,542
Net income (loss)	—	—		—		156,510		—	—		—		156,510		81		156,591
Other comprehensive loss	—	—		—		—		—	—		(302,317)		(302,317)		—		(302,317)
Repurchase of common stock	—	—		—		—		548	(49,980)		—		(49,980)		—		(49,980)
Share-based compensation      plans:
Stock options exercised	—	—		—		—		—	—		—		—		—		—
Non-vested shares awarded,      net	(3)	—		—		—		—	—		—		—		—		—
Vesting of non-vested      shares	—	—		—		—		—	—		—		—		—		—
Share-based compensation	—	—		3,805		—		—	—		—		3,805		—		3,805
Cash dividends on common      stock	—	—		—		(35,423)		—	—		—		(35,423)		—		(35,423)
Capital calls and distributions,      net	—	—		—		—		—	—		—		—		90		90
Balance, September 30, 2022	76,405	$	5	$	1,385,481	$	4,691,924	9,150	$	(662,531)	$	(904,945)	$	4,509,934	$	4,374	$	4,514,308
Balance, December 31, 2021	76,254	$	5	$	1,378,794	$	4,447,691	7,786	$	(535,129)	$	72,371	$	5,363,732	$	4,639	$	5,368,371
Net income (loss)	—	—		—		351,844		—	—		—		351,844		57		351,901
Other comprehensive loss	—	—		—		—		—	—		(977,316)		(977,316)		—		(977,316)
Repurchase of common stock	—	—		—		—		1,318	(122,458)		—		(122,458)		—		(122,458)
Share-based compensation      plans:
Stock options exercised	1	—		37		—		—	—		—		37		—		37
Non-vested shares awarded,      net	150	—		—		—		—	—		—		—		—		—
Vesting of non-vested      shares	—	—		—		—		46	(4,944)		—		(4,944)		—		(4,944)
Share-based compensation	—	—		6,650		—		—	—		—		6,650		—		6,650
Cash dividends on common      stock	—	—		—		(107,611)		—	—		—		(107,611)		—		(107,611)
Capital calls and distributions,      net	—	—		—		—		—	—		—		—		(322)		(322)
Balance, September 30, 2022	76,405	$	5	$	1,385,481	$	4,691,924	9,150	$	(662,531)	$	(904,945)	$	4,509,934	$	4,374	$	4,514,308

See accompanying notes to consolidated financial statements.

- 49 -

Consolidated Statements of Cash Flows (Unaudited)

(In thousands)

	Nine Months Ended
	September 30,
	2023		2022
Cash Flows From Operating Activities:
Net income	$	448,611	$	351,901
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Provision for credit losses	40,000		15,000
Change in fair value of mortgage servicing rights due to market assumption changes	(11,241)		(83,165)
Change in the fair value of mortgage servicing rights due to principal payments	21,031		24,277
Net unrealized (gains) losses from derivative contracts	(55,127)		(31,677)
Share-based compensation	14,273		6,650
Depreciation and amortization	81,002		80,215
Net amortization of discounts and premiums	(14,216)		8,676
Net losses (gains) on financial instruments and other losses (gains), net	(12,702)		5,285
Net loss (gain) on mortgage loans held for sale	4,306		795
Mortgage loans originated for sale	(527,136)		(1,039,313)
Proceeds from sale of mortgage loans held for sale	527,115		1,085,632
Capitalized mortgage servicing rights	(9,757)		(15,810)
Change in trading and fair value option securities	(7,477)		6,951,932
Change in receivables	14,079		41,705
Change in other assets	74,107		9,899
Change in other liabilities	(58,926)		(68,084)
Net cash provided by (used in) operating activities	527,942		7,343,918
Cash Flows From Investing Activities:
Proceeds from maturities or redemptions of investment securities	214,869		100,418
Proceeds from maturities or redemptions of available for sale securities	1,134,602		1,827,825
Purchases of investment securities	(2,504)		(10,000)
Purchases of available for sale securities	(1,843,827)		(2,716,590)
Proceeds from sales of available for sale securities	135,489		242,135
Change in amount receivable on unsettled available for sale securities transactions	7,471		(11,348)
Loans originated, net of principal collected	(1,168,401)		(1,572,461)
Net payments on derivative asset contracts	143,543		(35,198)
Net change in restricted equity securities	(135,461)		(17,243)
Proceeds from disposition of assets	36,993		17,759
Purchases of assets	(128,902)		(151,320)
Net cash provided by (used in) investing activities	(1,606,128)		(2,326,023)
Cash Flows From Financing Activities:
Net change in demand deposits, transaction deposits and savings accounts	(2,293,528)		(4,580,959)
Net change in time deposits	1,465,375		(245,185)
Net change in other borrowed funds	1,906,678		(1,528,634)
Net proceeds on derivative liability contracts	(153,692)		15,215
Net change in derivative margin accounts	312,397		271,418
Change in amount due on unsettled available for sale securities transactions	53,219		56,725
Issuance of common and treasury stock, net	(4,695)		(4,907)
Repurchase of common stock	(126,611)		(122,458)
Dividends paid	(107,738)		(107,611)
Net cash provided by (used in) financing activities	1,051,405		(6,246,396)
Net increase (decrease) in cash and cash equivalents	(26,781)		(1,228,501)
Cash and cash equivalents at beginning of period	1,401,716		2,837,410
Cash and cash equivalents at end of period	$	1,374,935	$	1,608,909
Supplemental Cash Flow Information:
Cash paid for interest	$	706,011	$	80,759
Cash paid for taxes	$	156,092	$	67,147
Net loans and bank premises transferred to repossessed real estate and other assets	$	367	$	12,314
Transfer of available for sale securities to investment securities	$	—	$	2,454,273
Residential mortgage loans guaranteed by U.S. government agencies that became eligible for repurchase during the period	$	10,679	$	27,317
Conveyance of other real estate owned guaranteed by U.S. government agencies	$	4,007	$	5,882
Right-of-use assets obtained in exchange for operating lease liabilities	$	65,241	$	21,198

See accompanying notes to consolidated financial statements.

- 50 -

Notes to Consolidated Financial Statements (Unaudited)

(1) Significant Accounting Policies

Basis of Presentation

The accompanying unaudited consolidated financial statements of BOK Financial Corporation ("BOK Financial" or "the Company") have been prepared in accordance with accounting principles for interim financial information generally accepted in the United States and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included.

The unaudited consolidated financial statements include accounts of BOK Financial and its subsidiaries, principally BOKF, NA ("the Bank"), BOK Financial Securities, Inc., and BOK Financial Private Wealth, Inc. Operating divisions of the Bank include Bank of Albuquerque, Bank of Oklahoma, Bank of Texas, BOK Financial in Arizona, Arkansas, Colorado and Kansas/Missouri, BOK Financial Mortgage and the TransFund electronic funds network.

Certain reclassifications have been made to conform to the current period presentation.

The financial information should be read in conjunction with BOK Financial's 2022 Form 10-K filed with the Securities and Exchange Commission, which contains audited financial statements. Amounts presented as of December 31, 2022 have been derived from the audited financial statements included in BOK Financial's 2022 Form 10-K but do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. Operating results for the nine-month period ended September 30, 2023 are not necessarily indicative of the results that may be expected for the year ending December 31, 2023.

Newly Adopted and Pending Accounting Policies

Financial Accounting Standards Board ("FASB")

FASB Accounting Standards Update No. 2022-02, Financial Instruments - Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures ("ASU 2022-02")

On March 31, 2022, the FASB issued ASU 2022-02 which eliminates the accounting guidance on troubled debt restructurings ("TDRs") for creditors in ASC 310-40, while also no longer requiring an entity to consider renewals, modifications, and extensions that result from reasonably expected TDRs in their calculation of the allowance for credit losses. For receivables for which there has been a modification in their contractual cash flows, ASU 2022-02 requires disclosure, by class of financing receivable, of the types of modifications, the financial effects of those modifications, and the performance of these modified receivables, along with receivables that had a payment default during the current period and had modifications to the contractual cash flows within 12 months prior to the default. Further, ASU 2022-02 requires entities to disclose gross write-offs recorded in the current period by year of origination in the vintage disclosures on a year-to-date basis. ASU 2022-02 was effective for the Company January 1, 2023. Amendments related to TDR recognition and measurement and vintage disclosures were applied prospectively and are included in Note 4 to the consolidated financial statements. Adoption of this standard did not have a material effect on the Company's financial condition or results of operations.

FASB Accounting Standards Update No. 2023-01, Leases (Topic 842): Common Control Arrangements ("ASU 2023-01")

On March 27, 2023, the FASB issued ASU 2023-01 which, in part, amends the accounting for leasehold improvement in common-control arrangements. Under previous guidance, a lessee is generally required to amortize leasehold improvements that it owns over the shorter of the useful life of those improvements or the lease term. However, due to the nature of leasehold improvements made under leases between entities under common control, ASU 2023-01 requires a lessee in a common-control arrangement to amortize such leasehold improvements that it owns over the improvements' useful life to the common control group, regardless of the lease term. ASU 2023-01 is effective for fiscal years beginning after December 15, 2023, including interim periods within those fiscal years. Adoption of ASU 2023-01 is not expected to have a material impact on the Company's financial statements.

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FASB Accounting Standards Update No. 2023-02, Investments - Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method ("ASU 2023-02")

On March 29, 2023, the FASB issued ASU 2023-02 which amends previous guidance to allow entities to account for qualifying tax equity investments using the proportional amortization method regardless of the program giving rise to the related income tax credits, as opposed to only being allowed to apply this method to qualifying tax equity investments in low-income housing tax credit structures as was the case under previous guidance. ASU 2023-02 is effective for fiscal years beginning after December 15, 2023, including interim periods within those fiscal years. On June 30, 2023, the Company early adopted ASU 2023-02 as of January 1, 2023 using the modified retrospective approach, which did not have a material impact on the Company's financial statements. The Company transitioned from the equity method of accounting and began applying the proportional amortization method of accounting to its qualifying new markets tax credit and historic tax credit investments in addition to its low income housing tax credit partnerships already subject to the proportional amortization method.

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(2) Securities

Trading Securities

The fair value and net unrealized gain (loss) included in trading securities are as follows (in thousands):

	September 30, 2023				December 31, 2022
	Fair Value		Net Unrealized Gain (Loss)		Fair Value		Net Unrealized Gain (Loss)
U.S. government securities	$	18,843	$	8	$	9,823	$	(16)
Residential agency mortgage-backed securities	4,653,161		(107,212)		4,406,848		4
Municipal securities	51,998		(1,175)		21,484		(136)
Other trading securities	24,099		120		26,006		(175)
Total trading securities	$	4,748,101	$	(108,259)	$	4,464,161	$	(323)

Investment Securities

The amortized cost and fair values of investment securities are as follows (in thousands):

	September 30, 2023
	Amortized		Carrying		Fair		Gross Unrealized
	Cost		Value1		Value		Gain		Loss
Municipal securities	$	121,003	$	121,003	$	122,695	$	2,882	$	(1,190)
Mortgage-backed securities:
Residential agency	2,322,710		2,146,133		1,901,143		95		(245,085)
Commercial agency	17,258		15,838		14,371		—		(1,467)
Other debt securities	15,788		15,788		14,158		—		(1,630)
Total investment securities	2,476,759		2,298,762		2,052,367		2,977		(249,372)
Allowance for credit losses	(344)		(344)		—		—		—
Investment securities, net of allowance	$	2,476,415	$	2,298,418	$	2,052,367	$	2,977	$	(249,372)

1    Carrying value includes $178 million of net unrealized loss which remains in Accumulated other comprehensive income ("AOCI") in the Consolidated Balance Sheets related to certain securities transferred during the second quarter of 2022 from the Available for Sale securities portfolio to the Investment securities portfolio.

	December 31, 2022
	Amortized		Carrying		Fair		Gross Unrealized
	Cost		Value1		Value		Gain		Loss
Municipal securities	$	170,629	$	170,629	$	176,621	$	6,456	$	(464)
Mortgage-backed securities:
Residential agency	2,538,565		2,315,219		2,143,360		155		(172,014)
Commercial agency	17,259		15,609		14,588		—		(1,021)
Other debt securities	12,788		12,788		12,199		—		(589)
Total investment securities	2,739,241		2,514,245		2,346,768		6,611		(174,088)
Allowance for credit losses	(558)		(558)		—		—		—
Investment securities, net of allowance	$	2,738,683	$	2,513,687	$	2,346,768	$	6,611	$	(174,088)

1    Carrying value includes $225 million of net unrealized loss which remains in AOCI in the Consolidated Balance Sheets related to certain securities transferred during the second quarter of 2022 from the Available for Sale securities portfolio to the Investment securities portfolio.

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The amortized cost and fair values of investment securities at September 30, 2023, by contractual maturity, are as shown in the following table (dollars in thousands):

	Less than One Year		One to Five Years		Six to Ten Years		Over Ten Years		Total		Weighted Average Maturity1
Fixed maturity debt securities:
Carrying value	$	17,756	$	100,534	$	34,326	$	13	$	152,629	3.53
Fair value	17,804		102,168		31,239		13		151,224
Residential mortgage-backed securities:
Carrying value									$	2,146,133	2
Fair value									1,901,143
Total investment securities:
Carrying value									$	2,298,762
Fair value									2,052,367

1Expected maturities may differ from contractual maturities, because borrowers may have the right to call or prepay obligations with or without penalty.

2The average expected lives of residential mortgage-backed securities were 5.3 years based upon current prepayment assumptions.

Temporarily Impaired Investment Securities

(dollars in thousands):

	September 30, 2023
	Number of Securities	Less Than 12 Months				12 Months or Longer				Total
		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Investment:
Municipal securities	59	$	28,962	$	601	$	6,200	$	589	$	35,162	$	1,190
Mortgage-backed securities:
Residential agency	116	—		—		1,900,066		245,085		1,900,066		245,085
Commercial agency	2	—		—		14,371		1,467		14,371		1,467
Other debt securities	3	—		—		8,645		1,630		8,645		1,630
Total investment securities	180	$	28,962	$	601	$	1,929,282	$	248,771	$	1,958,244	$	249,372

	December 31, 2022
	Number of Securities	Less Than 12 Months				12 Months or Longer				Total
		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Investment:
Municipal securities	22	$	18,037	$	406	$	544	$	58	$	18,581	$	464
Mortgage-backed securities:
Residential agency	116	2,142,114		172,014		—		—		2,142,114		172,014
Commercial agency	2	14,588		1,021		—		—		14,588		1,021
Other debt securities	3	9,428		571		257		18		9,685		589
Total investment securities	143	$	2,184,167	$	174,012	$	801	$	76	$	2,184,968	$	174,088

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Available for Sale Securities 

The amortized cost and fair value of available for sale securities are as follows (in thousands):

	September 30, 2023
	Amortized		Fair		Gross Unrealized
	Cost		Value		Gain		Loss
U.S. Treasury	$	1,000	$	897	$	—	$	(103)
Municipal securities	545,940		488,269		—		(57,671)
Mortgage-backed securities:
Residential agency	6,686,602		6,216,955		162		(469,809)
Residential non-agency	774,074		715,806		9,830		(68,098)
Commercial agency	4,933,051		4,484,247		37		(448,841)
Other debt securities	500		473		—		(27)
Total available for sale securities	$	12,941,167	$	11,906,647	$	10,029	$	(1,044,549)

	December 31, 2022
	Amortized		Fair		Gross Unrealized
	Cost		Value		Gain		Loss
U.S. Treasury	$	1,000	$	898	$	—	$	(102)
Municipal securities	687,875		624,500		321		(63,696)
Mortgage-backed securities:
Residential agency	6,161,358		5,814,496		13,085		(359,947)
Residential non-agency	616,423		577,576		11,776		(50,623)
Commercial agency	4,892,257		4,475,917		3,479		(419,819)
Other debt securities	500		473		—		(27)
Total available for sale securities	$	12,359,413	$	11,493,860	$	28,661	$	(894,214)

The amortized cost and fair values of available for sale securities at September 30, 2023, by contractual maturity, are as shown in the following table (dollars in thousands):

	Less than One Year		One to Five Years		Six to Ten Years		Over Ten Years		Total		Weighted Average Maturity1
Fixed maturity debt securities:
Amortized cost	$	347,874	$	3,048,923	$	1,554,983	$	528,711	$	5,480,491	5.58
Fair value	341,476		2,759,574		1,382,272		490,564		4,973,886
Residential mortgage-backed securities:
Amortized cost									$	7,460,676	2
Fair value									6,932,761
Total available for sale securities:
Amortized cost									$	12,941,167
Fair value									11,906,647

1Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without penalty.

2The average expected lives of residential mortgage-backed securities were 4.4 years based upon current prepayment assumptions.

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Sales of available for sale securities resulted in gains and losses as follows (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Proceeds	$	—	$	30,834	$	135,489	$	242,135
Gross realized gains	—		1,116		703		4,510
Gross realized losses	—		(224)		(3,713)		(1,493)
Related federal and state income tax expense (benefit)	—		209		(708)		706

The fair value of debt securities pledged as collateral for repurchase agreements, public trust funds on deposit and for other purposes, as required by law was $13.1 billion at September 30, 2023 and $11.2 billion at December 31, 2022. The secured parties do not have the right to sell or repledge these securities.

Temporarily Impaired Available for Sale Securities

(Dollars in thousands)

	September 30, 2023
	Number of Securities	Less Than 12 Months				12 Months or Longer				Total
		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Available for sale:
U.S. Treasury	1	$	—	$	—	$	897	$	103	$	897	$	103
Municipal securities	191	7,688		606		480,582		57,065		488,270		57,671
Mortgage-backed securities:
Residential agency	752	2,276,744		55,455		3,879,833		414,354		6,156,577		469,809
Residential non-agency	39	269,254		7,317		431,379		60,781		700,633		68,098
Commercial agency	302	821,238		20,920		3,622,841		427,921		4,444,079		448,841
Other debt securities	1	—		—		473		27		473		27
Total available for sale securities	1,286	$	3,374,924	$	84,298	$	8,416,005	$	960,251	$	11,790,929	$	1,044,549

	December 31, 2022
	Number of Securities	Less Than 12 Months				12 Months or Longer				Total
		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Available for sale:
U.S. Treasury	1	$	—	$	—	$	899	$	102	$	899	$	102
Municipal securities	227	146,634		5,301		428,248		58,395		574,882		63,696
Mortgage-backed securities:
Residential agency	613	3,879,582		256,973		863,732		102,974		4,743,314		359,947
Residential non-agency	26	499,716		50,623		—		—		499,716		50,623
Commercial agency	285	1,647,778		63,701		2,535,816		356,118		4,183,594		419,819
Other debt securities	1	—		—		473		27		473		27
Total available for sale securities	1,153	$	6,173,710	$	376,598	$	3,829,168	$	517,616	$	10,002,878	$	894,214

Based on evaluations of impaired securities as of September 30, 2023, the Company does not intend to sell any impaired available for sale debt securities before fair value recovers to the current amortized cost, and it is more-likely-than-not that the Company will not be required to sell impaired securities before fair value recovers, which may be maturity.

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Fair Value Option Securities

Fair value option securities represent securities which the Company has elected to carry at fair value and are separately identified on the Consolidated Balance Sheets. Changes in the fair value are recognized in earnings as they occur. Certain securities are held as an economic hedge of the mortgage servicing rights. 

The fair value and net unrealized gain (loss) included in fair value option securities is as follows (in thousands):

	September 30, 2023		December 31, 2022
	Fair Value	Net Unrealized Gain (Loss)	Fair Value	Net Unrealized Gain (Loss)
Residential agency mortgage-backed securities	20,215	(2,436)	296,590	338

(3) Derivatives

Derivative instruments may be used by the Company as part of its internal risk management programs or may be offered to customers. All derivative instruments are carried at fair value, and changes in fair value are reported in earnings as they occur. Credit risk is also considered in determining fair value. Deterioration in the credit rating of customer or other counterparties reduce the fair value of asset contracts. Deterioration of our credit rating could decrease the fair value of our derivative liabilities.

When bilateral netting agreements or similar arrangements exist between the Company and its counterparties that create a single legal claim or obligation to pay or receive the net amount in settlement of the individual derivative contracts, the Company reports derivative assets and liabilities on a net by derivative contract type by counterparty basis.

Derivative contracts may require the Company to provide or receive cash margin as collateral for derivative assets and liabilities. Derivative assets and liabilities are reported net of cash margin when certain conditions are met. In addition, derivative contracts executed with customers under Customer Risk Management Programs may be secured by non-cash collateral in conjunction with a credit agreement with that customer. Access to collateral in the event of default is reasonably assured.

None of these derivative contracts have been designated as hedging instruments for accounting purposes.

Customer Risk Management Programs

BOK Financial offers programs to permit its customers to manage various risks, including fluctuations in energy, cattle and other agricultural products, interest rates and foreign exchange rates with derivative contracts. Customers may also manage interest rate risk through interest rate swaps used by borrowers to modify interest rate terms of their loans. Derivative contracts are executed between the customers and BOK Financial. Offsetting contracts are executed between BOK Financial and other selected counterparties to minimize the risk of changes in commodity prices, interest rates or foreign exchange rates. The counterparty contracts are identical to customer contracts, except for a fixed pricing spread or fee paid to BOK Financial as profit and compensation for administrative costs and credit risk which is recognized over the life of the contracts and included in Other operating revenue – Brokerage and trading revenue in the Consolidated Statements of Earnings.

Trading

BOK Financial may offer derivative instruments such as to-be-announced securities to mortgage banking customers to enable them to manage their market risk or to mitigate the Company's market risk of holding trading securities. Changes in the fair value of derivative instruments for trading purposes or used to mitigate the market risk of holding trading securities are included in Other operating revenue – Brokerage and trading revenue.

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Internal Risk Management Programs

BOK Financial may use derivative contracts in managing its interest rate sensitivity, as part of its economic hedge of the change in the fair value of mortgage servicing rights. Changes in the fair value of derivative instruments used in managing interest rate sensitivity and as part of the economic hedge of changes in the fair value of mortgage servicing rights are included in Other operating revenue – Gain (loss) on derivatives, net in the Consolidated Statements of Earnings.

As discussed in Note 5, certain derivative contracts not designated as hedging instruments related to mortgage loan commitments and forward sales contracts are included in Residential mortgage loans held for sale on the Consolidated Balance Sheets. See Note 5 for additional discussion of notional, fair value and impact on earnings of these contracts.

The following table summarizes the fair values of derivative contracts recorded as "derivative contracts" assets and liabilities in the balance sheet at September 30, 2023 (in thousands):

	Assets
	Notional1		Gross Fair Value		Netting Adjustments		Net Fair Value Before Cash Collateral		Cash Collateral		Fair Value Net of Cash Collateral
Customer risk management programs:
Interest rate contracts	$	2,763,185	$	160,856	$	—	$	160,856	$	(160,548)	$	308
Energy contracts	8,617,592		972,109		(607,483)		364,626		(34,399)		330,227
Foreign exchange contracts	70,676		68,262		—		68,262		(2,086)		66,176
Equity option contracts	5,524		47		—		47		(47)		—
Total customer risk management programs	11,456,977		1,201,274		(607,483)		593,791		(197,080)		396,711
Trading	24,569,954		234,809		(85,411)		149,398		—		149,398
Internal risk management programs	—		—		—		—		—		—
Total derivative contracts	$	36,026,931	$	1,436,083	$	(692,894)	$	743,189	$	(197,080)	$	546,109
	Liabilities
	Notional1		Gross Fair Value		Netting Adjustments		Net Fair Value Before Cash Collateral		Cash Collateral		Fair Value Net of Cash Collateral
Customer risk management programs:
Interest rate contracts	$	2,763,185	$	160,869	$	—	$	160,869	$	—	$	160,869
Energy contracts	8,941,634		966,583		(607,483)		359,100		(242,133)		116,967
Foreign exchange contracts	64,921		62,306		—		62,306		—		62,306
Equity option contracts	5,524		47		—		47		—		47
Total customer risk management programs	11,775,264		1,189,805		(607,483)		582,322		(242,133)		340,189
Trading	18,778,554		150,983		(85,412)		65,571		(6,138)		59,433
Internal risk management programs	295,000		4,325		—		4,325		—		4,325
Total derivative contracts	$	30,848,818	$	1,345,113	$	(692,895)	$	652,218	$	(248,271)	$	403,947

1    Notional amounts for commodity contracts are converted into dollar-equivalent amounts based on dollar prices at the inception of the contract.

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The following table summarizes the fair values of derivative contracts recorded as "derivative contracts" assets and liabilities in the balance sheet at December 31, 2022 (in thousands):

	Assets
	Notional 1		Gross Fair Value		Netting Adjustments		Net Fair Value Before Cash Collateral		Cash Collateral		Fair Value Net of Cash Collateral
Customer risk management programs:
Interest rate contracts	$	2,629,318	$	158,825	$	—	$	158,825	$	(114,955)	$	43,870
Energy contracts	7,918,020		1,232,283		(594,543)		637,740		(67,024)		570,716
Foreign exchange contracts	219,791		216,569		—		216,569		—		216,569
Equity option contracts	21,102		193		—		193		(109)		84
Total customer risk management programs	10,788,231		1,607,870		(594,543)		1,013,327		(182,088)		831,239
Trading	17,400,037		126,910		(74,647)		52,263		(4,646)		47,617
Internal risk management programs	85,000		1,500		(13)		1,487		—		1,487
Total derivative contracts	$	28,273,268	$	1,736,280	$	(669,203)	$	1,067,077	$	(186,734)	$	880,343
	Liabilities
	Notional 1		Gross Fair Value		Netting Adjustments		Net Fair Value Before Cash Collateral		Cash Collateral		Fair Value Net of Cash Collateral
Customer risk management programs:
Interest rate contracts	$	2,629,122	$	158,816	$	—	$	158,816	$	—	$	158,816
Energy contracts	8,696,060		1,242,058		(594,543)		647,515		(484,319)		163,196
Foreign exchange contracts	214,855		211,233		—		211,233		(7)		211,226
Equity option contracts	21,102		193		—		193		—		193
Total customer risk management programs	11,561,139		1,612,300		(594,543)		1,017,757		(484,326)		533,431
Trading	14,038,906		94,958		(74,647)		20,311		(423)		19,888
Internal risk management programs	178,806		1,594		(13)		1,581		—		1,581
Total derivative contracts	$	25,778,851	$	1,708,852	$	(669,203)	$	1,039,649	$	(484,749)	$	554,900

1    Notional amounts for commodity contracts are converted into dollar-equivalent amounts based on dollar prices at the inception of the contract.

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The following summarizes the pre-tax net gains (losses) on derivative instruments and where they are recorded in the income statement (in thousands):

	Three Months Ended
	September 30, 2023				September 30, 2022
	Brokerage and Trading Revenue		Gain (Loss) on Derivatives, Net		Brokerage and Trading Revenue		Gain (Loss) on Derivatives, Net
Customer risk management programs:
Interest rate contracts	$	800	$	—	$	2,677	$	—
Energy contracts	5,994		—		10,386		—
Foreign exchange contracts	61		—		116		—
Equity option contracts	—		—		—		—
Total customer risk management programs	6,855		—		13,179		—
Trading1	21,511		—		52,373		—
Internal risk management programs	—		(9,010)		—		(17,009)
Total derivative contracts	$	28,366	$	(9,010)	$	65,552	$	(17,009)

1    Represents changes in fair value of to-be-announced securities and other derivative instruments held to mitigate market risk of trading securities portfolio, which is offset by changes in fair value of trading securities also included in Brokerage and Trading Revenue in the Consolidated Statements of Earnings.

	Nine Months Ended
	September 30, 2023				September 30, 2022
	Brokerage and Trading Revenue		Gain (Loss) on Derivatives, Net		Brokerage and Trading Revenue		Gain (Loss) on Derivatives, Net
Customer risk management programs:
Interest rate contracts	4,909		—		9,958		—
Energy contracts	23,797		—		26,870		—
Foreign exchange contracts	145		—		422		—
Equity option contracts	—		—		—		—
Total customer risk management programs	28,851		—		37,250		—
Trading1	22,590		—		68,071		—
Internal risk management programs	—		(18,513)		—		(77,559)
Total derivative contracts	$	51,441	$	(18,513)	$	105,321	$	(77,559)

1    Represents changes in fair value of to-be-announced securities and other derivative instruments held to mitigate market risk of trading securities portfolio, which is offset by changes in fair value of trading securities also included in Brokerage and Trading Revenue in the Consolidated Statements of Earnings.

(4) Loans and Allowances for Credit Losses

Loans

Loans are either secured or unsecured based on the type of loan and the financial condition of the borrower. Repayment is generally expected from cash flow or proceeds from the sale of selected assets of the borrower. BOK Financial is exposed to risk of loss on loans due to the borrower's difficulties, which may arise from any number of factors, including problems within the respective industry or local economic conditions. Access to collateral, in the event of borrower default, is reasonably assured through adherence to applicable lending laws and through sound lending standards and credit review procedures. Accounting policies for all loans, excluding residential mortgage loans guaranteed by U.S. government agencies, are as follows.

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Interest is accrued at the applicable interest rate on the principal amount outstanding. Loans are placed on nonaccruing status when, in the opinion of management, full collection of principal or interest is uncertain. Internally risk graded loans are individually evaluated for nonaccruing status quarterly. Non-risk graded loans are generally placed on nonaccruing status when more than 90 days past due or within 60 days of being notified of the borrower's bankruptcy filing. Interest previously accrued but not collected is charged against interest income when the loan is placed on nonaccruing status. Accrued but not paid interest receivable is included in Receivables in the Consolidated Balance Sheets. Payments on nonaccruing loans are applied to principal or recognized as interest income, according to management's judgment as to the collectability of principal. Loans may be returned to accruing status when, in the opinion of management, full collection of principal and interest, including principal previously charged off, is probable based on improvements in the borrower's financial condition or a sustained period of performance.

For loans acquired with no evidence of credit deterioration, discounts are accreted on either an individual basis for loans with unique characteristics or on a pool basis for groups of homogeneous loans. Accretion is discontinued when a loan with an individually attributed discount is placed on nonaccruing status.

Modifications of loans to existing borrowers generally consist of interest rate reductions, extension of payment terms, or a combination of these. Modifications may arise either voluntarily through negotiations with the borrower or involuntarily through court order. Payment deferrals up to six months are generally considered to be short-term modifications. Generally, principal and accrued but unpaid interest is not voluntarily forgiven. A change to the allowance for credit losses is generally not recorded upon modification because the effect of most modifications made to borrowers experiencing financial difficulty is already included in the allowance methodology.

Performing loans may be renewed under the current collateral value, debt service ratio and other underwriting standards. Nonaccruing loans may be renewed and will remain classified as nonaccruing. 

Occasionally, loans, other than residential mortgage loans, may be held for sale in order to manage credit concentration. These loans are carried at the lower of cost or fair value with gains or losses recognized in Other gains (losses), net in the Consolidated Statements of Earnings.

All loans are charged off when the loan balance or a portion of the loan balance is no longer supported by the paying capacity of the borrower or when the required cash flow is reduced in a modification. The charge-off amount is determined through a quarterly evaluation of available cash resources and collateral values. Internally risk graded loans are evaluated quarterly, and charge-offs are taken in the quarter in which the loss is identified. Non-risk graded loans that are past due between 60 days and 180 days, based on the loan product type, are charged off. Loans to borrowers whose personal obligation has been discharged through Chapter 7 bankruptcy proceedings are charged off within 60 days of notice of the bankruptcy filing, regardless of payment status.

Loan origination and commitment fees and direct loan acquisition and origination costs are deferred and amortized as an adjustment to yield over the life of the loan or over the commitment period, as applicable. Amortization does not anticipate loan prepayments. Net unamortized fees are recognized in full at time of payoff.

Qualifying residential mortgage loans guaranteed by U.S. government agencies have been sold into GNMA pools. Under certain performance conditions specified in government programs, the Company may have the right, but not the obligation to repurchase loans from GNMA pools. These loans no longer qualify for sale accounting and are recognized in the Consolidated Balance Sheets. We do not expect to receive all principal and interest based on the loan's contractual terms. A portion of the principal balance continues to be guaranteed; however, interest accrues at a curtailed rate as specified in the programs. The carrying value of these loans is reduced based on an estimate of the expected cash flows discounted at the original note rate plus a liquidity spread. Guaranteed loans may be modified in accordance with U.S. government agency guidelines. Interest continues to accrue based on the modified rate. Guaranteed loans may either be resold into GNMA pools after a performance period specified by the programs or foreclosed and conveyed to the guarantors.

Loans are disaggregated into portfolio segments and further disaggregated into classes. The portfolio segment is the level at which the Company develops and documents a systematic method for determining its allowance for credit losses. Classes are a further disaggregation of portfolio segments based on the risk characteristics of the loans and the Company's method for monitoring and assessing credit risk. 

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Portfolio segments of the loan portfolio are as follows (in thousands):

	September 30, 2023								December 31, 2022
	Fixed Rate		Variable Rate		Non-accrual		Total		Fixed Rate		Variable Rate		Non-accrual		Total
Commercial	$	3,536,353	$	11,112,788	$	70,698	$	14,719,839	$	3,392,422	$	10,759,780	$	60,297	$	14,212,499
Commercial real estate	848,042		4,385,840		7,418		5,241,300		874,716		3,715,491		16,570		4,606,777
Loans to individuals	2,229,750		1,491,660		41,469		3,762,879		2,099,165		1,593,779		44,930		3,737,874
Total	$	6,614,145	$	16,990,288	$	119,585	$	23,724,018	$	6,366,303	$	16,069,050	$	121,797	$	22,557,150

Credit Commitments

Commitments to extend credit are agreements to lend to a customer as long as there is no violation of conditions established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. At September 30, 2023, outstanding commitments totaled $14.4 billion. Because some commitments are expected to expire before being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. BOK Financial uses the same credit policies in making commitments as it does loans.

The amount of collateral obtained, if deemed necessary, is based upon management's credit evaluation of the borrower.

Standby letters of credit are conditional commitments issued to guarantee the performance of a customer to a third party. Because the credit risk involved in issuing standby letters of credit is essentially the same as that involved in extending loan commitments, BOK Financial uses the same credit policies in evaluating the creditworthiness of the customer. Additionally, BOK Financial uses the same evaluation process in obtaining collateral on standby letters of credit as it does for loan commitments. The term of these standby letters of credit is defined in each commitment and typically corresponds with the underlying loan commitment. At September 30, 2023, outstanding standby letters of credit totaled $760 million. 

Allowances for Credit Losses and Accrual for Off-balance Sheet Credit Risk from Unfunded Loans Commitments

The allowance for loan losses and accrual for off-balance sheet credit risk from unfunded loan commitments represent the portion of the amortized cost basis of loans that we do not expect to collect over the asset's contractual life, considering past events, current conditions, and reasonable and supportable forecasts of future economic conditions. The appropriateness of the allowance for credit losses, including industry and product adjustments, is assessed quarterly by a senior management Allowance Committee. This review is based on an ongoing evaluation of the estimated expected credit losses in the portfolio and on unused commitments to provide financing. A well-documented methodology has been developed and is applied by an independent Credit Administration department to assure consistency across the Company.

The allowance for loan losses consists of specific allowances attributed to certain individual loans, generally nonaccruing loans, with dissimilar risk characteristics that have not yet been charged down to amounts we expect to recover and general allowances for estimated credit losses on pools of loans that share similar risk characteristics.

When full collection of principal or interest is uncertain, the loan's risk characteristics have changed, and we exclude the loan from the general allowance pool, typically designating it as nonaccruing. For these loans, a specific allowance reflects the expected credit loss.

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We measure specific allowances for loans excluded from the general allowance pool by an evaluation of estimated future cash flows discounted at the loan's initial effective interest rate or the fair value of collateral for certain collateral dependent loans. For a non-collateral dependent loan, the specific allowance is the amount by which the loan's amortized cost basis exceeds its net realizable value. We measure the specific allowance for collateral dependent loans as the amount by which the loan's amortized cost basis exceeds its fair value. When repayment is expected to be provided substantially through the sale of collateral, we deduct estimated selling costs from the collateral's fair value. Generally, for real property held as collateral for loans, third-party appraisals that conform to Uniform Standards of Professional Appraisal Practice serve as the basis for the fair value of real property held as collateral. These appraised values are on an "as-is" basis and generally are not adjusted by the Company. We obtain updated appraisals at least annually or more frequently if market conditions indicate collateral values may have declined. For energy loans, our internal staff of engineers generally determines collateral value of mineral rights based on projected cash flows from proven oil and gas reserves under existing economic and operating conditions. For real property held as collateral for other loans, third-party appraisals that conform to Uniform Standards of Professional Appraisal Practice generally serve as the basis for the fair value. These appraised values are on an "as-is" basis and generally are not adjusted by the Company. We obtain updated appraisals at least annually or more frequently if market conditions indicate collateral values may have declined. Our special assets staff generally determines the value of other collateral based on projected liquidation cash flows under current market conditions. We evaluate collateral values and available cash resources quarterly. Historical statistics may be used to estimate specific allowances in limited situations, such as when a collateral dependent loan is removed from the general allowance pool near the end of a reporting period until an appraisal of collateral value is received or a full assessment of future cash flows is completed.

General allowances estimate expected credit losses on pools of loans sharing similar risk characteristics that are expected to occur over the loan's estimated remaining life. The loan's estimated remaining life represents the contractual term adjusted for amortization, estimates of prepayments, and borrower-owned extension options. Approximately 90 percent of the committed dollars in the loan portfolio is risk graded loans with general allowance model inputs that include probability of default, loss given default, and exposure at default. Probability of default is based on the migration of loans from performing to nonperforming using historical life of loan analysis periods. Loss given default is based on the aggregate losses incurred, net of estimated recoveries. Exposure at default represents an estimate of the outstanding amount of credit exposure at the time a default may occur.

Charge-off migration is used to calculate the general allowance for the majority of non-risk graded loans to individuals. The expected credit loss on less than 10 percent of the committed dollars in the portfolio is calculated using charge-off migration.

The expected credit loss on approximately 1 percent of the committed dollars in the portfolio is calculated using a non-modeled approach. Specifically, the calculation applies a long-term net charge-off rate to the loan balances, adjusted for the weighted average remaining maturity of each portfolio.

In estimating the expected credit losses for general allowances on performing risk-graded loans, each portfolio class is assigned relevant economic loss drivers which best explain variations in portfolio net loss rates. The probability of default estimates for each portfolio class are adjusted for current and forecasted economic conditions. The result is applied to the exposure at default and loss given default to calculate the lifetime expected credit loss estimate. Selection of relevant economic loss drivers is re-evaluated periodically and involves statistical analysis as well as management judgment. The unemployment rate factors significantly in the allowance for loan losses calculation, affecting commercial and loans to individuals segments. Other primary factors impacting the commercial portfolio include BBB corporate spreads, real gross domestic product growth rate, and energy commodity prices. The primary commercial real estate variables are vacancy rate and BBB corporate spreads. In addition to the unemployment rate, the forecast for loans to individuals is tied to a home price index. The forecasts may include regional economic factors when localized conditions diverge from national conditions.

An Economic Forecast Committee, consisting of senior management with members largely independent of the allowance process develops a twelve-month forward-looking forecast for the relevant economic loss drivers. Management develops these forecasts based on external data as well as a view of future economic conditions which may include adjustments for regional conditions. The forecast includes three economic scenarios and probability weights for each scenario. The base forecast represents management's view of the most likely outcome, while the downside forecast reflects reasonably possible worsening economic conditions, and the upside forecast projects reasonably possible improving conditions.

At the end of the one-year reasonable and supportable forecast period, we transition from shorter-term expected losses to long-term loss averages for the loan's estimated remaining life. The difference between short-term loss forecasts and long-term loss averages is run-off over the reversion horizon, up to three years, depending on the forecasted economic scenarios.

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General allowances also consider the estimated impact of factors that are not captured in the modeled results or historical experience. These factors may increase or decrease modeled results by amounts determined by the Allowance Committee. Factors not captured in modeled results or historical experience may include for example, new lines of business, market conditions that have not been previously encountered, observed changes in credit risk that are not yet reflected in macro-economic factors, or economic conditions that impact loss given default assumptions.

The accrual for off-balance sheet credit risk is maintained at a level that is appropriate to cover estimated losses associated with credit instruments that are not currently recognized as assets such as loan commitments, standby letters of credit or guarantees that are not unconditionally cancelable by the bank. This accrual is included in other liabilities in the Consolidated Balance Sheets. The appropriateness of the accrual is determined in the same manner as the allowance for loan losses, with the added consideration of commitment usage over the remaining life for those loans that the bank can not unconditionally cancel.

A provision for credit losses is charged against or credited to earnings in amounts necessary to maintain an appropriate Allowance for Credit Losses. Recoveries of loans previously charged off are added to the allowance when received.

The activity in the allowance for loan losses and the allowance for off-balance sheet credit losses related to loan commitments and standby letters of credit is summarized as follows (in thousands):

	Three Months Ended
	September 30, 2023
	Commercial		Commercial Real Estate		Loans to Individuals		Total
Allowance for loan losses:
Beginning balance	$	143,269	$	76,347	$	43,098	$	262,714
Provision for loan losses	1,158		11,152		3,621		15,931
Loans charged off	(6,769)		(2,238)		(1,586)		(10,593)
Recoveries of loans previously charged off	273		3,167		622		4,062
Ending balance	$	137,931	$	88,428	$	45,755	$	272,114
Allowance for off-balance sheet credit risk from unfunded loan commitments:
Beginning balance	$	20,294	$	37,681	$	1,965	$	59,940
Provision for off-balance sheet credit risk	(2,179)		(5,076)		(81)		(7,336)
Ending balance	$	18,115	$	32,605	$	1,884	$	52,604

	Nine Months Ended
	September 30, 2023
	Commercial		Commercial Real Estate		Loans to Individuals		Total
Allowance for loan losses:
Beginning balance	$	131,586	$	57,648	$	46,470	$	235,704
Provision for loan losses	12,908		35,878		1,627		50,413
Loans charged off	(9,578)		(8,446)		(4,285)		(22,309)
Recoveries of loans previously charged off	3,015		3,348		1,943		8,306
Ending balance	$	137,931	$	88,428	$	45,755	$	272,114
Allowance for off-balance sheet credit risk from unfunded loan commitments:
Beginning balance	$	18,246	$	40,490	$	2,183	$	60,919
Provision for off-balance sheet credit risk	(131)		(7,885)		(299)		(8,315)
Ending balance	$	18,115	$	32,605	$	1,884	$	52,604

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	Three Months Ended
	September 30, 2022
	Commercial		Commercial Real Estate		Loans to Individuals		Total
Allowance for loan losses:
Beginning balance	$	137,562	$	62,997	$	40,555	$	241,114
Provision for loan losses	3,158		(4,415)		2,368		1,111
Loans charged off	(75)		—		(1,691)		(1,766)
Recoveries of loans previously charged off	721		7		581		1,309
Ending balance	$	141,366	$	58,589	$	41,813	$	241,768
Allowance for off-balance sheet credit risk from unfunded loan commitments:
Beginning balance	$	15,839	$	24,670	$	1,741	$	42,250
Provision for off-balance sheet credit risk	939		12,826		295		14,060
Ending balance	$	16,778	$	37,496	$	2,036	$	56,310

	Nine Months Ended
	September 30, 2022
	Commercial		Commercial Real Estate		Loans to Individuals		Total
Allowance for loan losses:
Beginning balance	$	162,056	$	58,553	$	35,812	$	256,421
Provision for loan losses	(17,428)		138		8,276		(9,014)
Loans charged off	(6,162)		(269)		(4,508)		(10,939)
Recoveries of loans previously charged off	2,900		167		2,233		5,300
Ending balance	$	141,366	$	58,589	$	41,813	$	241,768
Allowance for off-balance sheet credit risk from unfunded loan commitments:
Beginning balance	$	13,812	$	17,442	$	1,723	$	32,977
Provision for off-balance sheet credit risk	2,966		20,054		313		23,333
Ending balance	$	16,778	$	37,496	$	2,036	$	56,310

A $7.0 million provision for credit losses was necessary for the third quarter of 2023, reflecting modest improvement in the economic outlook and the impact of forecasted higher energy prices during the forecast period, offset by loan growth and the impact of a more challenging national commercial real estate environment, particularly related to office.

The allowance for loan losses and recorded investment of the related loans by portfolio segment for each measurement method at September 30, 2023 is as follows (in thousands):

	Collectively Measured for General Allowances				Individually Measured for Specific Allowances				Total
	Recorded Investment		Related Allowance		Recorded Investment		Related Allowance		Recorded Investment		Related Allowance
Commercial	$	14,649,141	$	136,285	$	70,698	$	1,646	$	14,719,839	$	137,931
Commercial real estate	5,233,882		88,428		7,418		—		5,241,300		88,428
Loans to individuals	3,721,410		45,755		41,469		—		3,762,879		45,755
Total	$	23,604,433	$	270,468	$	119,585	$	1,646	$	23,724,018	$	272,114

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The allowance for loan losses and recorded investment of the related loans by portfolio segment for each measurement method at December 31, 2022 is as follows (in thousands):

	Collectively Measured for General Allowances				Individually Measured for Specific Allowances				Total
	Recorded Investment		Related Allowance		Recorded Investment		Related Allowance		Recorded Investment		Related Allowance
Commercial	$	14,152,202	$	127,566	$	60,297	$	4,020	$	14,212,499	$	131,586
Commercial real estate	4,590,207		56,098		16,570		1,550		4,606,777		57,648
Loans to individuals	3,692,944		46,470		44,930		—		3,737,874		46,470
Total	$	22,435,353	$	230,134	$	121,797	$	5,570	$	22,557,150	$	235,704

Credit Quality Indicators

The Company utilizes risk grading as primary credit quality indicators as it influences the probability of default which is a key attribute in the expected credit losses calculation. Substantially all commercial as well as commercial real estate loans and certain loans to individuals are risk graded based on a quarterly evaluation of the borrowers' ability to repay the loans. Certain commercial loans and most loans to individuals are small, homogeneous pools that are not risk-graded. The credit quality of these loans is based on past due days in accordance with regulatory guidelines.

We have included in the credit quality indicator "pass" loans that are in compliance with the original terms of the agreement and currently exhibit no factors that cause management to have doubts about the borrowers' ability to remain in compliance with the original terms of the agreement, which is consistent with the regulatory guideline of "pass". This also includes past due residential mortgages that are guaranteed by agencies of the U.S. government that continue to accrue interest based on criteria of the guarantors' programs.

Other loans especially mentioned ("Special Mention") are currently performing in compliance with the original terms of the agreement but may have a potential weakness that deserves management's close attention, consistent with regulatory guidelines. Non-graded loans 30 to 59 days past due are categorized as Special Mention.

The risk grading process identifies certain loans that have a well-defined weakness (for example, inadequate debt service coverage or liquidity or marginal capitalization; repayment may depend on collateral or other risk mitigation) that may jeopardize liquidation of the debt and represent a greater risk due to deterioration in the financial condition of the borrower. This is consistent with the regulatory guideline for "substandard". Because the borrowers are still performing in accordance with the original terms of the loan agreements, these loans remain on accruing status. Non-graded loans 60 to 89 days past due are categorized as Accruing Substandard.

Nonaccruing loans represent loans for which full collection of principal and interest is uncertain. This includes certain loans considered "substandard" and all loans considered "doubtful" by regulatory guidelines. Non-graded loans 90 or more days past due are categorized as Nonaccrual.

Probability of default is lowest for pass graded loans and increases for each credit quality indicator, Special Mention, and Accruing Substandard.

Vintage represents the year of origination, except for revolving loans which are considered in aggregate. Loans that were once revolving but have converted to term loans without additional underwriting appear in a separate vintage column.

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The following table summarizes the Company’s loan portfolio at September 30, 2023 by the risk grade categories and vintage (in thousands): 

	Origination Year
	2023		2022		2021		2020		2019		Prior		Revolving Loans		Revolving Loans Converted to Term Loans		Total
Commercial:
Energy
Pass	$	192,614	$	106,593	$	45,795	$	8,190	$	10,463	$	12,518	$	3,064,120	$	—	$	3,440,293
Special Mention	—		—		—		—		—		—		13,950		—		13,950
Accruing Substandard	—		—		—		—		—		—		16,800		—		16,800
Nonaccrual	—		—		—		—		—		108		19,451		—		19,559
Total energy	192,614		106,593		45,795		8,190		10,463		12,626		3,114,321		—		3,490,602
Loans charged-off, year-to-date	—		—		—		—		—		—		—		—		—
Healthcare
Pass	485,617		903,150		573,317		464,170		338,944		947,581		268,806		16		3,981,601
Special Mention	—		—		18,719		—		2,421		18,072		980		—		40,192
Accruing Substandard	—		589		214		6,957		—		10,046		1,700		—		19,506
Nonaccrual	—		—		—		—		25,797		10,525		5,513		—		41,835
Total healthcare	485,617		903,739		592,250		471,127		367,162		986,224		276,999		16		4,083,134
Loans charged-off, year-to-date	—		—		—		—		—		—		—		—		—
Services
Pass	707,494		541,539		412,450		247,092		131,269		723,365		759,327		870		3,523,406
Special Mention	—		13,051		1,836		1,531		596		2,733		1,421		—		21,168
Accruing Substandard	—		5,752		730		1,716		2,333		3,446		4,957		33		18,967
Nonaccrual	—		—		2,161		337		—		—		322		—		2,820
Total services	707,494		560,342		417,177		250,676		134,198		729,544		766,027		903		3,566,361
Loans charged-off, year-to-date	—		—		3,360		—		—		—		1,577		—		4,937
General business
Pass	667,802		504,364		262,660		148,645		140,220		319,113		1,396,919		2,196		3,441,919
Special Mention	9,277		15,059		9,103		1,115		287		8,389		7,959		—		51,189
Accruing Substandard	3,956		37,025		1,440		37		—		—		37,693		—		80,151
Nonaccrual	—		—		—		—		—		54		6,385		44		6,483
Total general business	681,035		556,448		273,203		149,797		140,507		327,556		1,448,956		2,240		3,579,742
Loans charged-off, year-to-date	—		—		4,598		2		—		17		14		10		4,641
Total commercial	2,066,760		2,127,122		1,328,425		879,790		652,330		2,055,950		5,606,303		3,159		14,719,839
Commercial real estate:
Pass	361,934		1,730,828		1,211,694		480,710		555,902		723,783		139,721		—		5,204,572
Special Mention	—		—		—		—		—		19,212		—		—		19,212
Accruing Substandard	—		—		79		—		—		10,019		—		—		10,098
Nonaccrual	—		—		—		—		7,263		155		—		—		7,418
Total commercial real estate	361,934		1,730,828		1,211,773		480,710		563,165		753,169		139,721		—		5,241,300
Loans charged-off, year-to-date	—		—		—		—		—		8,446		—		—		8,446

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	Origination Year
	2023		2022		2021		2020		2019		Prior		Revolving Loans		Revolving Loans Converted to Term Loans		Total
Loans to individuals:
Residential mortgage
Pass	320,680		332,368		348,782		354,284		57,944		252,027		366,136		22,277		2,054,498
Special Mention	—		359		262		1,339		—		152		3,144		88		5,344
Accruing Substandard	—		—		—		—		—		45		101		51		197
Nonaccrual	—		1,298		2,223		2,771		723		20,728		2,196		1,014		30,953
Total residential mortgage	320,680		334,025		351,267		358,394		58,667		272,952		371,577		23,430		2,090,992
Loans charged-off, year-to-date	—		—		51		4		—		14		1		—		70
Residential mortgage guaranteed by U.S. government agencies
Pass	—		1,624		2,030		4,749		6,752		135,502		—		—		150,657
Nonaccrual	—		—		—		280		376		9,779		—		—		10,435
Total residential mortgage guaranteed by U.S. government agencies	—		1,624		2,030		5,029		7,128		145,281		—		—		161,092
Personal:
Pass	161,514		227,726		167,566		137,761		133,304		158,721		523,513		195		1,510,300
Special Mention	100		30		103		22		2		—		—		—		257
Accruing Substandard	—		—		—		2		157		—		—		—		159
Nonaccrual	—		27		4		9		4		12		23		—		79
Total personal	161,614		227,783		167,673		137,794		133,467		158,733		523,536		195		1,510,795
Loans charged-off, year-to-date	—		60		40		41		—		4,042		26		6		4,215
Total loans to individuals	482,294		563,432		520,970		501,217		199,262		576,966		895,113		23,625		3,762,879
Total loans	$	2,910,988	$	4,421,382	$	3,061,168	$	1,861,717	$	1,414,757	$	3,386,085	$	6,641,137	$	26,784	$	23,724,018

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The following table summarizes the Company's loan portfolio at December 31, 2022 by the risk grade categories and vintage (in thousands): 

	Origination Year
	2022		2021		2020		2019		2018		Prior		Revolving Loans		Revolving Loans Converted to Term Loans		Total
Commercial:
Energy
Pass	$	157,745	$	76,951	$	30,284	$	12,783	$	5,992	$	4,980	$	3,104,906	$	—	$	3,393,641
Accruing Substandard	—		—		—		664		385		683		28,018		—		29,750
Nonaccrual	—		—		—		—		—		159		1,240		—		1,399
Total energy	157,745		76,951		30,284		13,447		6,377		5,822		3,134,164		—		3,424,790
Healthcare
Pass	932,097		604,886		476,854		404,204		464,989		618,163		245,898		20		3,747,111
Special Mention	—		—		—		20,071		—		18,859		4		—		38,934
Accruing Substandard	—		—		—		—		—		14,304		3,634		—		17,938
Nonaccrual	—		—		—		26,480		6,373		8,181		—		—		41,034
Total healthcare	932,097		604,886		476,854		450,755		471,362		659,507		249,536		20		3,845,017
Services
Pass	821,785		496,510		286,085		193,481		156,736		696,300		722,371		639		3,373,907
Special Mention	502		5,139		989		771		894		1,345		8,668		—		18,308
Accruing Substandard	—		—		—		2,459		43		2,789		17,665		122		23,078
Nonaccrual	—		5,570		449		—		—		2,389		7,820		—		16,228
Total services	822,287		507,219		287,523		196,711		157,673		702,823		756,524		761		3,431,521
General business
Pass	725,894		361,839		198,274		172,878		139,140		283,694		1,570,536		2,329		3,454,584
Special Mention	17,759		13,065		208		71		7		2,291		7,094		26		40,521
Accruing Substandard	—		2,169		66		4,130		4,680		3,287		94		4		14,430
Nonaccrual	—		—		1,052		14		72		5		485		8		1,636
Total general business	743,653		377,073		199,600		177,093		143,899		289,277		1,578,209		2,367		3,511,171
Total commercial	2,655,782		1,566,129		994,261		838,006		779,311		1,657,429		5,718,433		3,148		14,212,499
Commercial real estate:
Pass	1,188,483		1,158,002		552,616		641,102		247,625		633,304		161,616		—		4,582,748
Accruing Substandard	—		—		—		7,459		—		—		—		—		7,459
Nonaccrual	—		—		—		—		—		16,570		—		—		16,570
Total commercial real estate	1,188,483		1,158,002		552,616		648,561		247,625		649,874		161,616		—		4,606,777

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	Origination Year
	2022		2021		2020		2019		2018		Prior		Revolving Loans		Revolving Loans Converted to Term Loans		Total
Loans to individuals:
Residential mortgage
Pass	354,497		373,190		393,002		63,142		40,525		260,625		352,126		22,176		1,859,283
Special Mention	—		81		42		—		142		388		527		87		1,267
Accruing Substandard	—		—		187		—		—		138		117		1		443
Nonaccrual	32		1,656		2,717		362		1,904		20,139		2,216		765		29,791
Total residential mortgage	354,529		374,927		395,948		63,504		42,571		281,290		354,986		23,029		1,890,784
Residential mortgage guaranteed by U.S. government agencies
Pass	289		2,254		9,000		10,722		17,244		191,426		—		—		230,935
Nonaccrual	—		—		299		1,460		2,319		10,927		—		—		15,005
Total residential mortgage guaranteed by U.S. government agencies	289		2,254		9,299		12,182		19,563		202,353		—		—		245,940
Personal:
Pass	254,497		193,095		154,887		172,114		68,871		201,278		549,187		332		1,594,261
Special Mention	47		28		40		12		17		—		6,003		4		6,151
Accruing Substandard	—		444		—		160		—		—		—		—		604
Nonaccrual	38		7		12		22		14		18		23		—		134
Total personal	254,582		193,574		154,939		172,308		68,902		201,296		555,213		336		1,601,150
Total loans to individuals	609,400		570,755		560,186		247,994		131,036		684,939		910,199		23,365		3,737,874
Total loans	$	4,453,665	$	3,294,886	$	2,107,063	$	1,734,561	$	1,157,972	$	2,992,242	$	6,790,248	$	26,513	$	22,557,150

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Nonaccruing Loans

A summary of nonaccruing loans at September 30, 2023 follows (in thousands): 

	As of September 30, 2023
	Total		With No Allowance		With Allowance		Related Allowance
Commercial:
Energy	$	19,559	$	19,559	$	—	$	—
Healthcare	41,836		41,836		—		—
Services	2,820		337		2,483		1,646
General business	6,483		6,483		—		—
Total commercial	70,698		68,215		2,483		1,646
Commercial real estate	7,418		7,418		—		—
Loans to individuals:
Residential mortgage	30,954		30,954		—		—
Residential mortgage guaranteed by U.S. government agencies	10,436		10,436		—		—
Personal	79		79		—		—
Total loans to individuals	41,469		41,469		—		—
Total	$	119,585	$	117,102	$	2,483	$	1,646

A summary of nonaccruing loans at December 31, 2022 follows (in thousands): 

	As of December 31, 2022
	Total		With No Allowance		With Allowance		Related Allowance
Commercial:
Energy	$	1,399	$	1,399	$	—	$	—
Healthcare	41,034		34,661		6,373		946
Services	16,228		7,835		8,393		3,074
General business	1,636		1,636		—		—
Total commercial	60,297		45,531		14,766		4,020
Commercial real estate	16,570		393		16,177		1,550
Loans to individuals:
Residential mortgage	29,791		29,791		—		—
Residential mortgage guaranteed by U.S. government agencies	15,005		15,005		—		—
Personal	134		134		—		—
Total loans to individuals	44,930		44,930		—		—
Total	$	121,797	$	90,854	$	30,943	$	5,570

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Loan Modifications to Borrowers Experiencing Financial Difficulty

At September 30, 2023 the Company had $136 million of loan modifications to borrowers experiencing financial difficulty, including $81 million of general business loans, $42 million of healthcare loans and $12 million of residential mortgage loans guaranteed by U.S. government agencies. Modifications generally consist of interest rate reductions, an other than insignificant payment delay, term extension or a combination. Approximately $97 million of the modifications are term extensions of healthcare and general business loans, and $38 million are combination modifications to healthcare loans and loans to individuals. During the nine months ended September 30, 2023, $4.0 million of residential mortgage loans were modified and subsequently defaulted with nearly all of these defaulted loans being guaranteed by U.S. government agencies. A payment default is defined as being 30 or more days past due after modification.

Past Due Loans

Past due status for all loan classes is based on the actual number of days since the last payment was due according to the contractual terms of the loans, as modified for short-term payment deferral forbearance.

A summary of loans currently performing and past due as of September 30, 2023 is as follows (in thousands):

			Past Due								Past Due 90 Days or More and Accruing
	Current		30 to 59 Days		60 to 89 Days		90 Days or More		Total
Commercial:
Energy	$	3,490,602	$	—	$	—	$	—	$	3,490,602	$	—
Healthcare	4,051,359		10		—		31,765		4,083,134		—
Services	3,564,401		599		324		1,037		3,566,361		—
General business	3,573,237		37		112		6,356		3,579,742		13
Total commercial	14,679,599		646		436		39,158		14,719,839		13
Commercial real estate	5,233,549		—		488		7,263		5,241,300		—
Loans to individuals:
Residential mortgage	2,077,418		9,713		818		3,043		2,090,992		51
Residential mortgage guaranteed by U.S. government agencies	58,486		31,390		19,004		52,212		161,092		47,670
Personal	1,510,472		298		2		23		1,510,795		—
Total loans to individuals	3,646,376		41,401		19,824		55,278		3,762,879		47,721
Total	$	23,559,524	$	42,047	$	20,748	$	101,699	$	23,724,018	$	47,734

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A summary of loans currently performing and past due as of December 31, 2022 is as follows (in thousands):

			Past Due								Past Due 90 Days or More and Accruing
	Current		30 to 59 Days		60 to 89 Days		90 Days or More		Total
Commercial:
Energy	$	3,424,766	$	24	$	—	$	—	$	3,424,790	$	—
Healthcare	3,812,164		5,914		26,480		459		3,845,017		—
Services	3,423,042		1,060		2,461		4,958		3,431,521		—
General business	3,509,094		257		1,424		396		3,511,171		396
Total commercial	14,169,066		7,255		30,365		5,813		14,212,499		396
Commercial real estate	4,606,029		531		—		217		4,606,777		—
Loans to individuals:
Residential mortgage	1,872,155		10,632		1,828		6,169		1,890,784		114
Residential mortgage guaranteed by U.S. government agencies	108,019		36,119		19,400		82,402		245,940		75,604
Personal	1,600,595		502		21		32		1,601,150		—
Total loans to individuals	3,580,769		47,253		21,249		88,603		3,737,874		75,718
Total	$	22,355,864	$	55,039	$	51,614	$	94,633	$	22,557,150	$	76,114

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(5) Mortgage Banking Activities

Residential Mortgage Loan Production

The Company originates, markets and services conventional and government-sponsored residential mortgage loans. Generally, conforming fixed rate residential mortgage loans are held for sale in the secondary market, and non-conforming and adjustable-rate residential mortgage loans are retained for investment. Residential mortgage loans originated for sale by the Company are carried at fair value based on sales commitments and market quotes. Changes in the fair value of mortgage loans held for sale are included in Other operating revenue – Mortgage banking revenue. Residential mortgage loans held for sale also includes the fair value of residential mortgage loan commitments and forward sales commitments, which are considered derivative contracts that have not been designated as hedging instruments for accounting purposes. The volume of mortgage loans originated for sale and secondary market prices are the primary drivers of originating and marketing revenue.

Residential mortgage loan commitments are generally outstanding for 60 to 90 days, which represents the typical period from commitment to originate a residential mortgage loan to when the closed loan is sold to an investor. Residential mortgage loan commitments are subject to both credit and interest rate risk. Credit risk is managed through underwriting policies and procedures, including collateral requirements, which are generally accepted by the secondary loan markets. Exposure to interest rate fluctuations is partially managed through forward sales of residential mortgage-backed securities and forward sales contracts. These latter contracts set the price for loans that will be delivered in the next 60 to 90 days.

The unpaid principal balance of residential mortgage loans held for sale, notional amounts of derivative contracts related to residential mortgage loan commitments and forward contract sales and their related fair values included in Mortgage loans held for sale on the Consolidated Balance Sheets were (in thousands):

	September 30, 2023				December 31, 2022
	Unpaid Principal Balance/ Notional		Fair Value		Unpaid Principal Balance/ Notional		Fair Value
Residential mortgage loans held for sale	$	71,304	$	69,653	$	74,941	$	73,938
Residential mortgage loan commitments	49,285		1,541		45,492		1,054
Forward sales contracts	102,529		1,295		109,469		280
			$	72,489			$	75,272

No residential mortgage loans held for sale were 90 days or more past due or considered impaired as of September 30, 2023 or December 31, 2022. No credit losses were recognized on residential mortgage loans held for sale for the nine month period ended September 30, 2023 and 2022.

Mortgage banking revenue was as follows (in thousands):

	Three Months Ended September 30,				Nine Months Ended Sep. 30,
	2023		2022		2023		2022
Production revenue:
Net realized gains (losses) on sale of mortgage loans	$	(1,631)	$	(1,072)	$	(3,658)	$	8,969
Net change in unrealized loss on mortgage loans held for sale	(522)		(6,244)		(648)		(9,764)
Net change in the fair value of mortgage loan commitments	(288)		(3,174)		487		(5,474)
Net change in the fair value of forward sales contracts	554		8,084		1,015		8,414
Total production revenue (loss)	(1,887)		(2,406)		(2,804)		2,145
Servicing revenue	15,243		13,688		45,668		37,155
Total mortgage banking revenue	$	13,356	$	11,282	$	42,864	$	39,300

Production revenue includes gain (loss) on residential mortgage loans held for sale and changes in the fair value of derivative contracts not designated as hedging instruments for accounting purposes related to residential mortgage loan commitments and forward sales contracts. Servicing revenue includes servicing fee income and late charges on loans serviced for others.

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Residential Mortgage Servicing

Mortgage servicing rights may be originated or purchased. Both originated and purchased mortgage servicing rights are initially recognized at fair value. The Company has elected to carry all mortgage servicing rights at fair value. Changes in the fair value are recognized in earnings as they occur. The unpaid principal balance of loans serviced for others is the primary driver of servicing revenue.

The following represents a summary of mortgage servicing rights (dollars in thousands):

	September 30, 2023			December 31, 2022
Number of residential mortgage loans serviced for others	116,941			110,541
Outstanding principal balance of residential mortgage loans serviced for others	$	20,607,013		$	18,863,201
Weighted average interest rate	3.61		%	3.59		%
Remaining term (in months)	282			283

The following represents activity in capitalized mortgage servicing rights (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Beginning Balance	$	304,722	$	270,312	$	277,608	$	163,198
Additions	3,154		4,841		9,757		15,810
Acquisitions	2,669		1,043		33,807		45,910
Change in fair value due to principal payments	(7,202)		(8,960)		(21,031)		(24,277)
Change in fair value due to market assumption changes	8,039		16,570		11,241		83,165
Ending Balance	$	311,382	$	283,806	$	311,382	$	283,806

Changes in the fair value of mortgage servicing rights due to market assumption changes are included in Other operating revenue in the Consolidated Statements of Earnings. Changes in fair value due to principal payments are included in Mortgage banking costs. 

Mortgage servicing rights are not traded in active markets. Fair value is determined by discounting the projected net cash flows. Significant market assumptions used to determine fair value based on significant unobservable inputs were as follows:

	September 30, 2023	December 31, 2022
Discount rate – risk-free rate plus a market premium	9.84%	9.51%
Prepayment rate - based upon loan interest rate, original term and loan type	7.15%	7.54%
Loan servicing costs – annually per loan based upon loan type:
Performing loans	$69 - $94	$69 - $94
Delinquent loans	$150 - $500	$150 - $500
Loans in foreclosure	$875 - $8,000	$875 - $8,000
Escrow earnings rate – indexed to rates paid on deposit accounts with comparable average life	4.66%	4.06%
Primary/secondary mortgage rate spread	105 bps	105 bps
Delinquency rate	2.00%	2.33%

Changes in primary residential mortgage interest rates directly affect the prepayment speeds used in valuing our mortgage servicing rights. A separate third-party model is used to estimate prepayment speeds based on interest rates, housing turnover rates, estimated loan curtailment, anticipated defaults and other relevant factors. The prepayment model is updated periodically for changes in market conditions and adjusted to better correlate with actual performance of BOK Financial's servicing portfolio.

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(6) Commitments and Contingent Liabilities

Litigation Contingencies

On June 24, 2015, BOKF, NA received a complaint that an employee had colluded with a bond issuer and an individual in misusing revenues pledged to municipal bonds for which BOKF, NA served as trustee under the bond indenture. The Company conducted an investigation and concluded that employees in one of its Corporate Trust offices had, with respect to a single group of affiliated bond issuances, violated Company policies and procedures. The relationship manager was terminated. The Company reported the circumstances to, and cooperated with an investigation by, the Securities and Exchange Commission ("SEC"). On September 7, 2016, BOKF, NA agreed to, and the SEC entered, a consent order finding that BOKF, NA had violated Section 17(a) of the Securities Act of 1933 and Section 10(b) of the Securities Exchange Act and required BOKF, NA to disgorge $1,067,721 of fees and pay a civil penalty of $600,000. BOKF, NA disgorged the fees and paid the penalty. On August 26, 2016, BOKF, NA was sued in the United States District Court for New Jersey by two bondholders in a putative class action alleging BOKF, NA participated in the fraudulent sale of securities by the principals. While the action remains stayed with no current deadlines pending, plaintiffs informed the Court of their intent to request the stay be lifted in a joint status report in July but have yet to do so. BOKF, NA plans to oppose any request to lift the stay. On September 14, 2016, BOKF, NA was sued in the District Court of Tulsa County, Oklahoma by 19 bondholders also alleging BOKF, NA participated in the fraudulent sale of securities by the principals. On April 18, 2023 seven plaintiffs dismissed their claims without prejudice. Discovery on the remaining plaintiff's claims is ongoing. Management is advised by counsel that, in the Tulsa County District Court action, a loss is not probable and that the loss, if any, cannot be reasonably estimated.

On December 28, 2015, in an action brought by the SEC, the New Jersey District Court entered a judgment against the principals involved in issuing the bonds. On January 8, 2020, the Court entered judgment against the principal individual and his wife for $36,805,051 in principal amount and $10,937,831 in pre-judgment interest. The SEC continues to aggressively pursue collection of the judgment. If the individual principal and his wife cannot pay the bonds, a bondholder loss could become probable. Management has been advised by counsel that BOKF, NA has valid defenses to claims of bondholders and that no loss to the Company is probable. No provision for losses has been made at this time. BOKF, NA estimates that, upon sale of all remaining collateral securing payment of the bonds, approximately $30 million in principal will remain outstanding. A reasonable estimate cannot be made of the amount of any bondholder loss, though the amount of bondholder loss could be material to the Company in the event a loss to the Company becomes probable.

In the ordinary course of business, BOK Financial and its subsidiaries are subject to legal actions and complaints. Management believes, based upon the opinion of counsel, that the actions and liability or loss, if any, resulting from the final outcomes of the proceedings, will not have a material effect on the Company's financial condition, results of operations or cash flows.

Alternative Investment Commitments

The Company invests in several tax credit entities and other funds as permitted by banking regulations. Consolidation of these investments is based on the variable interest model.

At September 30, 2023, the Company has $413 million in interests in various alternative investments generally consisting of unconsolidated limited partnership interests in entities for which investment return is in the form of low income housing tax credits or other investments in merchant banking activities. These investments are recognized in Other assets on the Consolidated Balance Sheets. This investment balance also includes $104 million of unfunded commitments included in Other liabilities on the Consolidated Balance Sheets.

(7) Shareholders' Equity

On October 31, 2023, the Company declared a quarterly cash dividend of $0.55 per common share payable on or about November 30, 2023 to shareholders of record as of November 15, 2023.

Dividends declared were $0.54 and $1.62 per share during the three and nine months ended September 30, 2023 and $0.53 and $1.59 per share during the three and nine months ended September 30, 2022.

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Accumulated Other Comprehensive Income (Loss)

AOCI includes unrealized gains and losses on available for sale ("AFS") securities. AOCI also includes unrealized losses on AFS securities that were transferred from AFS to investment securities in the second quarter of 2022. Such amounts are being amortized over the estimated remaining life of the security as an adjustment to yield, offsetting the related amortization of premium on the transferred securities. Gains and losses in AOCI are net of deferred income taxes.

A rollforward of the components of accumulated other comprehensive income (loss) is included as follows (in thousands):

	Unrealized Gain (Loss) on
	Available for Sale Securities		Investment Securities Transferred from AFS		Employee Benefit Plans		Total
Balance, Dec. 31, 2021	$	69,775	$	—	$	2,596	$	72,371
Net change in unrealized gain (loss)	(1,293,661)		—		—		(1,293,661)
Transfer of net unrealized loss from AFS to investment securities	267,509		(267,509)		—		—
Reclassification adjustments included in earnings:
Interest revenue, Investment securities	—		24,130		—		24,130
Operating expense, Personnel	—		—		(3,483)		(3,483)
Gain on available for sale securities, net	(3,017)		—		—		(3,017)
Other comprehensive loss, before income taxes	(1,029,169)		(243,379)		(3,483)		(1,276,031)
Federal and state income taxes	(240,868)		(56,960)		(887)		(298,715)
Other comprehensive loss, net of income taxes	(788,301)		(186,419)		(2,596)		(977,316)
Balance, September 30, 2022	$	(718,526)	$	(186,419)	$	—	$	(904,945)
Balance, Dec. 31, 2022	$	(664,618)	$	(172,337)	$	—	$	(836,955)
Net change in unrealized gain (loss)	(171,977)		—		—		(171,977)
Reclassification adjustments included in earnings:
Interest revenue, Investment securities	—		46,996		—		46,996
Loss on available for sale securities, net	3,010		—		—		3,010
Other comprehensive income (loss), before income taxes	(168,967)		46,996		—		(121,971)
Federal and state income taxes	(40,735)		10,794		—		(29,941)
Other comprehensive income (loss), net of income taxes	(128,232)		36,202		—		(92,030)
Balance, September 30, 2023	$	(792,850)	$	(136,135)	$	—	$	(928,985)

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(8) Earnings Per Share

(In thousands, except share and per share amounts)	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Numerator:
Net income attributable to BOK Financial Corp. shareholders	$	134,495	$	156,510	$	448,171	$	351,844
Less: Earnings allocated to participating securities	1,104		1,161		3,561		2,562
Numerator for basic earnings per share – income available to common shareholders	133,391		155,349		444,610		349,282
Effect of reallocating undistributed earnings of participating securities	—		—		—		—
Numerator for diluted earnings per share – income available to common shareholders	$	133,391	$	155,349	$	444,610	$	349,282
Denominator:
Weighted average shares outstanding	66,090,988		67,503,041		66,484,557		67,902,592
Less:  Participating securities included in weighted average shares outstanding	542,681		499,842		529,263		492,803
Denominator for basic earnings per common share	65,548,307		67,003,199		65,955,294		67,409,789
Dilutive effect of employee stock compensation plans	—		1,424		—		1,433
Denominator for diluted earnings per common share	65,548,307		67,004,623		65,955,294		67,411,222
Basic earnings per share	$	2.04	$	2.32	$	6.74	$	5.18
Diluted earnings per share	$	2.04	$	2.32	$	6.74	$	5.18

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(9) Reportable Segments

Reportable segments reconciliation to the Consolidated Financial Statements for the three months ended September 30, 2023 is as follows (in thousands):

	Commercial		Consumer		Wealth Management		Funds Management and Other		BOK Financial Consolidated
Net interest revenue from external sources	$	298,293	$	11,386	$	7,622	$	(16,405)	$	300,896
Net interest revenue (expense) from internal sources	(43,829)		101,222		28,815		(86,208)		—
Net interest revenue (expense)	254,464		112,608		36,437		(102,613)		300,896
Net loans charged off and provision for credit losses	4,904		(73)		9		2,160		7,000
Net interest revenue after provision for credit losses	249,560		112,681		36,428		(104,773)		293,896
Other operating revenue	59,153		30,716		123,614		(15,331)		198,152
Other operating expense	81,751		54,497		89,367		98,698		324,313
Net direct contribution	226,962		88,900		70,675		(218,802)		167,735
Gain (loss) on financial instruments, net	(11)		(9,183)		—		9,194		—
Change in fair value of mortgage servicing rights	—		8,039		—		(8,039)		—
Gain (loss) on repossessed assets, net	(268)		11		—		257		—
Corporate expense allocations	17,834		11,920		14,331		(44,085)		—
Net income (loss) before taxes	208,849		75,847		56,344		(173,305)		167,735
Federal and state income taxes	50,919		17,838		13,315		(48,816)		33,256
Net income (loss)	157,930		58,009		43,029		(124,489)		134,479
Net income attributable to non-controlling interests	—		—		—		(16)		(16)
Net income (loss) attributable to BOK Financial Corp. shareholders	$	157,930	$	58,009	$	43,029	$	(124,473)	$	134,495
Average assets	$	28,849,597	$	9,379,478	$	14,740,641	$	(3,650,164)	$	49,319,552

Reportable segments reconciliation to the Consolidated Financial Statements for the nine months ended September 30, 2023 is as follows (in thousands):

	Commercial		Consumer		Wealth Management		Funds Management and Other		BOK Financial Consolidated
Net interest revenue from external sources	$	886,263	$	50,360	$	32,977	$	5,905	$	975,505
Net interest revenue (expense) from internal sources	(104,543)		285,020		106,918		(287,395)		—
Net interest revenue	781,720		335,380		139,895		(281,490)		975,505
Net loans charged off and provision for credit losses	10,980		2,240		(60)		26,840		40,000
Net interest revenue after provision for credit losses	770,740		333,140		139,955		(308,330)		935,505
Other operating revenue	184,826		93,603		355,568		(48,931)		585,066
Other operating expense	232,364		157,035		256,265		303,134		948,798
Net direct contribution	723,202		269,708		239,258		(660,395)		571,773
Gain (loss) on financial instruments, net	162		(24,113)		—		23,951		—
Change in fair value of mortgage servicing rights	—		11,241		—		(11,241)		—
Gain (loss) on repossessed assets, net	999		25		—		(1,024)		—
Corporate expense allocations	56,956		35,860		39,265		(132,081)		—
Net income (loss) before taxes	667,407		221,001		199,993		(516,628)		571,773
Federal and state income taxes	161,992		51,977		47,200		(138,007)		123,162
Net income (loss)	505,415		169,024		152,793		(378,621)		448,611
Net income attributable to non-controlling interests	—		—		—		440		440
Net income (loss) attributable to BOK Financial Corp. shareholders	$	505,415	$	169,024	$	152,793	$	(379,061)	$	448,171
Average assets	$	28,396,982	$	9,635,204	$	13,128,925	$	(3,412,178)	$	47,748,933

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Reportable segments reconciliation to the Consolidated Financial Statements for the three months ended September 30, 2022 is as follows (in thousands):

	Commercial		Consumer		Wealth Management		Funds Management and Other		BOK Financial Consolidated
Net interest revenue from external sources	$	226,016	$	17,482	$	34,746	$	38,081	$	316,325
Net interest revenue (expense) from internal sources	(17,951)		26,469		(1,162)		(7,356)		—
Net interest revenue	208,065		43,951		33,584		30,725		316,325
Net loans charged off and provision for credit losses	(526)		1,408		(22)		14,140		15,000
Net interest revenue after provision for credit losses	208,591		42,543		33,606		16,585		301,325
Other operating revenue	60,386		30,186		113,113		(13,987)		189,698
Other operating expense	75,490		53,236		79,151		86,874		294,751
Net direct contribution	193,487		19,493		67,568		(84,276)		196,272
Gain (loss) on financial instruments, net	4		(21,395)		—		21,391		—
Change in fair value of mortgage servicing rights	—		16,570		—		(16,570)		—
Gain (loss) on repossessed assets, net	(158)		—		—		158		—
Corporate expense allocations	16,438		10,792		12,934		(40,164)		—
Net income before taxes	176,895		3,876		54,634		(39,133)		196,272
Federal and state income taxes	42,761		906		12,826		(16,812)		39,681
Net income	134,134		2,970		41,808		(22,321)		156,591
Net loss attributable to non-controlling interests	—		—		—		81		81
Net income attributable to BOK Financial Corp. shareholders	$	134,134	$	2,970	$	41,808	$	(22,402)	$	156,510
Average assets	$	28,890,429	$	10,233,401	$	13,818,299	$	(7,822,927)	$	45,119,202

Reportable segments reconciliation to the Consolidated Financial Statements for the nine months ended September 30, 2022 is as follows (in thousands):

	Commercial		Consumer		Wealth Management		Funds Management and Other		BOK Financial Consolidated
Net interest revenue from external sources	$	546,599	$	51,183	$	130,389	$	130,583	$	858,754
Net interest revenue (expense) from internal sources	(34,983)		53,764		(3,290)		(15,491)		—
Net interest revenue	511,616		104,947		127,099		115,092		858,754
Net loans charged off and provision for credit losses	3,316		3,716		(153)		8,121		15,000
Net interest revenue after provision for credit losses	508,300		101,231		127,252		106,971		843,754
Other operating revenue	179,501		94,236		224,892		(52,458)		446,171
Other operating expense	210,012		154,685		230,166		251,161		846,024
Net direct contribution	477,789		40,782		121,978		(196,648)		443,901
Gain (loss) on financial instruments, net	(138)		(95,150)		—		95,288		—
Change in fair value of mortgage servicing rights	—		83,165		—		(83,165)		—
Gain (loss) on repossessed assets, net	(2,880)		138		—		2,742		—
Corporate expense allocations	49,285		32,994		37,508		(119,787)		—
Net income before taxes	425,486		(4,059)		84,470		(61,996)		443,901
Federal and state income taxes	103,711		(950)		19,897		(30,658)		92,000
Net income	321,775		(3,109)		64,573		(31,338)		351,901
Net loss attributable to non-controlling interests	—		—		—		57		57
Net income attributable to BOK Financial Corp. shareholders	$	321,775	$	(3,109)	$	64,573	$	(31,395)	$	351,844
Average assets	$	29,324,596	$	10,281,679	$	17,320,779	$	(9,290,763)	$	47,636,291

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(10) Fees and Commissions Revenue

Fees and commissions revenue is generated through the sales of products, consisting primarily of financial instruments, and the performance of services for customers under contractual obligations. Revenue from providing services for customers is recognized at the time services are provided in an amount that reflects the consideration we expect to be entitled to for those services. Revenue is recognized based on the application of five steps:

•Identify the contract with a customer

•Identify the performance obligations in the contract

•Determine the transaction price

•Allocate the transaction price to the performance obligations in the contract

•Recognize revenue when (or as) the Company satisfies a performance obligation

For contracts with multiple performance obligations, individual performance obligations are accounted for separately if the customer can benefit from the good or service on its own or with other resources readily available to the customer, and the promise to transfer goods and services to the customer is separately identifiable in the contract. The transaction price is allocated to the performance obligations based on relative standalone selling prices.

Revenue is recognized on a gross basis whenever we have primary responsibility and risk in providing the services or products to our customers and have discretion in establishing the price for the services or products. Revenue is recognized on a net basis whenever we act as an agent for products or services of others.

Brokerage and trading revenue includes revenues from trading, customer hedging, retail brokerage and investment banking. Trading revenue includes net realized and unrealized gains primarily related to sales of securities to institutional customers and related derivative contracts. Customer hedging revenue includes realized and unrealized changes in the fair value of derivative contracts held for customer risk management programs including credit valuation adjustments, as necessary. We offer commodity, interest rate, foreign exchange and equity derivatives to our customers. These customer contracts are offset with contracts with selected counterparties and exchanges to minimize changes in market risk from changes in commodity prices, interest rates or foreign exchange rates. Retail brokerage revenue represents fees and commissions earned on sales of fixed income securities, annuities, mutual funds and other financial instruments to retail customers. Investment banking revenue includes fees earned upon completion of underwriting and financial advisory services. Investment banking revenue also includes fees earned in conjunction with loan syndications. Insurance brokerage revenues represents fees and commissions earned on placement of insurance products with carriers for property and casualty and health coverage.

Transaction card revenue includes merchant discount fees and electronic funds transfer network fees, net of interchange fees paid to card issuers and assessments paid to card networks. Merchant discount fees represent fees paid by customers for account management and electronic processing of card transactions. Merchant discount fees are recognized at the time the customer's transactions are processed or other services are performed. The Company also maintains the TransFund electronic funds transfer network for the benefit of its members, which includes the Bank. Electronic funds transfer fees are recognized as electronic transactions processed on behalf of its members. 

Fiduciary and asset management revenue includes fees from asset management, custody, recordkeeping, investment advisory and administration services. Revenue is recognized on an accrual basis at the time the services are performed and may be based on either the fair value of the account or the service provided.

Deposit service charges and fees include commercial account service charges, overdraft fees, check card fee revenue and automated service charge and other deposit service fees. Fees are recognized at least quarterly in accordance with published deposit account agreements and disclosure statements for retail accounts or contractual agreements for commercial accounts. Item charges for overdraft or non-sufficient funds items are recognized as items are presented for payment. Account balance charges and activity fees are accrued monthly and collected in arrears. Commercial account activity fees may be offset by an earnings credit based on account balances. Check card fees represent interchange fees paid by a merchant bank for transactions processed from cards issued by the Company. Check card fees are recognized when transactions are processed.

Mortgage banking revenue includes revenues recognized in conjunction with the origination, marketing and servicing of conventional and government-sponsored residential mortgage loans. Mortgage production revenue includes net realized gains (losses) on sales of residential mortgage loans in the secondary market and the net change in unrealized gains (losses) on residential mortgage loans held for sale. Mortgage production revenue also includes changes in the fair value of derivative contracts not designated as hedging instruments related to residential mortgage loan commitments and forward sales contracts. Mortgage servicing revenue includes servicing fee income and late charges on loans serviced for others.

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Fees and commissions revenue by reportable segment and primary service line is as follows for the three months ended September 30, 2023 (in thousands):

	Commercial		Consumer		Wealth Management		Funds Management & Other		Consolidated		Out of Scope1		In Scope2
Trading revenue	$	—	$	—	$	34,461	$	(1)	$	34,460	$	34,460	$	—
Customer hedging revenue	7,403		—		(141)		(407)		6,855		6,855		—
Retail brokerage revenue	—		—		4,357		—		4,357		—		4,357
Insurance brokerage revenue	—		—		2,703		—		2,703		—		2,703
Investment banking revenue	4,508		—		9,428		1		13,937		3,823		10,114
Brokerage and trading revenue	11,911		—		50,808		(407)		62,312		45,138		17,174
TransFund EFT network revenue	21,038		875		(18)		1		21,896		—		21,896
Merchant services revenue	2,430		8		—		—		2,438		—		2,438
Corporate card revenue	1,768		—		179		106		2,053		—		2,053
Transaction card revenue	25,236		883		161		107		26,387		—		26,387
Personal trust revenue	—		—		22,890		(1)		22,889		—		22,889
Corporate trust revenue	—		—		8,713		—		8,713		—		8,713
Institutional trust & retirement plan services revenue	—		—		16,883		—		16,883		—		16,883
Investment management services and other revenue	—		—		3,769		2		3,771		—		3,771
Fiduciary and asset management revenue	—		—		52,255		1		52,256		—		52,256
Commercial account service charge revenue	13,687		524		496		2		14,709		—		14,709
Overdraft fee revenue	26		5,427		39		—		5,492		—		5,492
Check card revenue	—		5,926		—		2		5,928		—		5,928
Automated service charge and other deposit fee revenue	285		1,255		10		(3)		1,547		—		1,547
Deposit service charges and fees	13,998		13,132		545		1		27,676		—		27,676
Mortgage production revenue	—		(1,887)		—		—		(1,887)		(1,887)		—
Mortgage servicing revenue	—		15,861		—		(618)		15,243		15,243		—
Mortgage banking revenue	—		13,974		—		(618)		13,356		13,356		—
Other revenue	6,713		2,726		19,845		(13,419)		15,865		9,236		6,629
Total fees and commissions revenue	$	57,858	$	30,715	$	123,614	$	(14,335)	$	197,852	$	67,730	$	130,122

1     Out of scope revenue generally relates to financial instruments or contractual rights and obligations within the scope of other applicable accounting guidance.

2    In scope revenue represents revenue subject to FASB ASC Topic 606, Revenue from Contracts with Customers.

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Fees and commissions revenue by reportable segment and primary service line is as follows for the nine months ended September 30, 2023 (in thousands):

	Commercial		Consumer		Wealth Management		Funds Management & Other		Consolidated		Out of Scope1		In Scope2
Trading revenue	$	—	$	—	$	98,980	$	(1)	$	98,979	$	98,979	$	—
Customer hedging revenue	26,729		—		(200)		2,322		28,851		28,851		—
Retail brokerage revenue	—		—		11,522		—		11,522		—		11,522
Insurance brokerage revenue	—		—		8,866		—		8,866		—		8,866
Investment banking revenue	11,720		—		19,775		1		31,496		10,873		20,623
Brokerage and trading revenue	38,449		—		138,943		2,322		179,714		138,703		41,011
TransFund EFT network revenue	62,020		2,690		(52)		5		64,663		—		64,663
Merchant services revenue	7,074		26		—		—		7,100		—		7,100
Corporate card revenue	5,387		—		540		321		6,248		—		6,248
Transaction card revenue	74,481		2,716		488		326		78,011		—		78,011
Personal trust revenue	—		—		71,732		(1)		71,731		—		71,731
Corporate trust revenue	—		—		23,574		—		23,574		—		23,574
Institutional trust & retirement plan services revenue	—		—		43,843		—		43,843		—		43,843
Investment management services and other revenue	—		—		16,782		(20)		16,762		—		16,762
Fiduciary and asset management revenue	—		—		155,931		(21)		155,910		—		155,910
Commercial account service charge revenue	39,922		1,553		1,461		—		42,936		—		42,936
Overdraft fee revenue	83		15,321		101		1		15,506		—		15,506
Check card revenue	—		17,540		—		2		17,542		—		17,542
Automated service charge and other deposit fee revenue	789		3,801		172		(2)		4,760		—		4,760
Deposit service charges and fees	40,794		38,215		1,734		1		80,744		—		80,744
Mortgage production revenue	—		(2,804)		—		—		(2,804)		(2,804)		—
Mortgage servicing revenue	—		47,412		—		(1,744)		45,668		45,668		—
Mortgage banking revenue	—		44,608		—		(1,744)		42,864		42,864		—
Other revenue	19,673		8,118		58,479		(39,185)		47,085		25,963		21,122
Total fees and commissions revenue	$	173,397	$	93,657	$	355,575	$	(38,301)	$	584,328	$	207,530	$	376,798

1     Out of scope revenue generally relates to financial instruments or contractual rights and obligations within the scope of other applicable accounting guidance.

2    In scope revenue represents revenue subject to FASB ASC Topic 606, Revenue from Contracts with Customers.

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Fees and commissions revenue by reportable segment and primary service line is as follows for the three months ended September 30, 2022 (in thousands):

	Commercial		Consumer		Wealth Management		Funds Management & Other		Consolidated		Out of Scope1		In Scope2
Trading revenue	$	—	$	—	$	26,463	$	—	$	26,463	$	26,463	$	—
Customer hedging revenue	8,169		—		257		4,753		13,179		13,179		—
Retail brokerage revenue	—		—		3,839		(1)		3,838		—		3,838
Insurance brokerage revenue	—		—		3,254		—		3,254		—		3,254
Investment banking revenue	6,348		—		7,924		—		14,272		5,990		8,282
Brokerage and trading revenue	14,517		—		41,737		4,752		61,006		45,632		15,374
TransFund EFT network revenue	21,243		910		(19)		2		22,136		—		22,136
Merchant services revenue	1,917		8		—		—		1,925		—		1,925
Corporate card revenue	1,711		—		99		103		1,913		—		1,913
Transaction card revenue	24,871		918		80		105		25,974		—		25,974
Personal trust revenue	—		—		23,927		—		23,927		—		23,927
Corporate trust revenue	—		—		6,513		—		6,513		—		6,513
Institutional trust & retirement plan services revenue	—		—		13,019		(1)		13,018		—		13,018
Investment management services and other revenue	—		—		6,817		(85)		6,732		—		6,732
Fiduciary and asset management revenue	—		—		50,276		(86)		50,190		—		50,190
Commercial account service charge revenue	13,361		473		480		—		14,314		—		14,314
Overdraft fee revenue	29		6,936		19		3		6,987		—		6,987
Check card revenue	—		5,944		—		(2)		5,942		—		5,942
Automated service charge and other deposit fee revenue	201		1,205		54		—		1,460		—		1,460
Deposit service charges and fees	13,591		14,558		553		1		28,703		—		28,703
Mortgage production revenue	—		(2,406)		—		—		(2,406)		(2,406)		—
Mortgage servicing revenue	—		14,206		—		(518)		13,688		13,688		—
Mortgage banking revenue	—		11,800		—		(518)		11,282		11,282		—
Other revenue	5,168		2,954		20,467		(13,110)		15,479		4,227		11,252
Total fees and commissions revenue	$	58,147	$	30,230	$	113,113	$	(8,856)	$	192,634	$	61,141	$	131,493

1     Out of scope revenue generally relates to financial instruments or contractual rights and obligations within the scope of other applicable accounting guidance.

2    In scope revenue represents revenue subject to FASB ASC Topic 606, Revenue from Contracts with Customers.

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Fees and commissions revenue by reportable segment and primary service line is as follows for the nine months ended September 30, 2022 (in thousands):

	Commercial		Consumer		Wealth Management		Funds Management & Other		Consolidated		Out of Scope1		In Scope2
Trading revenue	$	—	$	—	$	(15,594)	$	—	$	(15,594)	$	(15,594)	$	—
Customer hedging revenue	28,888		—		1,379		6,983		37,250		37,250		—
Retail brokerage revenue	—		—		12,707		(1)		12,706		—		12,706
Insurance brokerage revenue	—		—		9,810		—		9,810		—		9,810
Investment banking revenue	16,775		—		17,023		—		33,798		15,461		18,337
Brokerage and trading revenue	45,663		—		25,325		6,982		77,970		37,117		40,853
TransFund EFT network revenue	59,763		2,708		(55)		5		62,421		—		62,421
Merchant services revenue	9,425		28		—		—		9,453		—		9,453
Corporate card revenue	4,681		—		276		299		5,256		—		5,256
Transaction card revenue	73,869		2,736		221		304		77,130		—		77,130
Personal trust revenue	—		—		73,551		—		73,551		—		73,551
Corporate trust revenue	—		—		16,947		—		16,947		—		16,947
Institutional trust & retirement plan services revenue	—		—		39,009		—		39,009		—		39,009
Investment management services and other revenue	—		—		17,050		(130)		16,920		—		16,920
Fiduciary and asset management revenue	—		—		146,557		(130)		146,427		—		146,427
Commercial account service charge revenue	40,283		1,392		1,516		—		43,191		—		43,191
Overdraft fee revenue	89		19,673		63		4		19,829		—		19,829
Check card revenue	—		17,502		—		—		17,502		—		17,502
Automated service charge and other deposit fee revenue	245		3,373		65		2		3,685		—		3,685
Deposit service charges and fees	40,617		41,940		1,644		6		84,207		—		84,207
Mortgage production revenue	—		2,145		—		—		2,145		2,145		—
Mortgage servicing revenue	—		38,650		—		(1,495)		37,155		37,155		—
Mortgage banking revenue	—		40,795		—		(1,495)		39,300		39,300		—
Other revenue	14,843		8,837		51,160		(36,232)		38,608		19,402		19,206
Total fees and commissions revenue	$	174,992	$	94,308	$	224,907	$	(30,565)	$	463,642	$	95,819	$	367,823

1     Out of scope revenue generally relates to financial instruments or contractual rights and obligations within the scope of other applicable accounting guidance.

2    In scope revenue represents revenue subject to FASB ASC Topic 606, Revenue from Contracts with Customers.

(11) Fair Value Measurements

Fair value is defined by applicable accounting guidance as the price to sell an asset or transfer a liability in an orderly transaction between market participants in the principal market for the given asset or liability at the measurement date based on market conditions at that date. An orderly transaction assumes exposure to the market for a customary period for marketing activities prior to the measurement date and not a forced liquidation or distressed sale. Certain assets and liabilities are recorded in the Company's financial statements at fair value. Some are recorded on a recurring basis and some on a non-recurring basis.

For some assets and liabilities, observable market transactions and market information might be available. For other assets and liabilities, observable market transactions and market information might not be available. A hierarchy for fair value has been established which categorizes into three levels the inputs to valuation techniques used to measure fair value. The three levels are as follows:

Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) - Fair value is based on unadjusted quoted prices in active markets for identical assets or liabilities.

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Significant Other Observable Inputs (Level 2) - Fair value is based on significant other observable inputs which are generally determined based on a single price for each financial instrument provided to us by an applicable third-party pricing service and is based on one or more of the following:

•Quoted prices for similar, but not identical, assets or liabilities in active markets;

•Quoted prices for identical or similar assets or liabilities in inactive markets;

•Inputs other than quoted prices that are observable, such as interest rate and yield curves, volatilities, prepayment speeds, loss severities, credit risks and default rates;

•Other inputs derived from or corroborated by observable market inputs.

Significant Unobservable Inputs (Level 3) - Fair value is based upon model-based valuation techniques for which at least one significant assumption is not observable in the market.

Transfers between levels are recognized as of the end of the reporting period. There were no transfers in or out of quoted prices in active markets for identical instruments to significant other observable inputs or significant unobservable inputs during the three and nine months ended September 30, 2023 and 2022, respectively. Transfers between significant other observable inputs and significant unobservable inputs during the three and nine months ended September 30, 2023 and 2022 were immaterial.

The underlying methods used by the third-party pricing services are considered in determining the primary inputs used to determine fair values. Management has evaluated the methodologies employed by the third-party pricing services by comparing the price provided by the pricing service with other sources, including brokers' quotes, sales or purchases of similar instruments and discounted cash flows to establish a basis for reliance on the pricing service values. Significant differences between the pricing service provided value and other sources are discussed with the pricing service to understand the basis for their values. Based on all observable inputs, management may adjust prices obtained from third-party pricing services to more appropriately reflect the prices that would be received to sell assets or paid to transfer liabilities in orderly transactions in the current market. No significant adjustments were made to prices provided by third-party pricing services at September 30, 2023 or December 31, 2022.

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Assets and Liabilities Measured at Fair Value on a Recurring Basis

The fair value of financial assets and liabilities measured on a recurring basis was as follows as of September 30, 2023 (in thousands):

	Total		Quoted Prices in Active Markets for Identical Instruments (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Trading securities:
U.S. government securities	$	18,843	$	17,932	$	911	$	—
Residential agency mortgage-backed securities	4,653,161		—		4,653,161		—
Municipal securities	51,998		—		51,998		—
Other trading securities	24,099		—		24,099		—
Total trading securities	4,748,101		17,932		4,730,169		—
Available for sale securities:
U.S. Treasury	897		897		—		—
Municipal securities	488,269		—		488,269		—
Residential agency mortgage-backed securities	6,216,955		—		6,216,955		—
Residential non-agency mortgage-backed securities	715,806		—		715,806		—
Commercial agency mortgage-backed securities	4,484,247		—		4,484,247		—
Other debt securities	473		—		—		473
Total available for sale securities	11,906,647		897		11,905,277		473
Fair value option securities — Residential agency mortgage-backed securities	20,215		—		20,215		—
Residential mortgage loans held for sale1	72,489		—		65,179		7,310
Mortgage servicing rights2	311,382		—		—		311,382
Derivative contracts, net of cash collateral3	546,109		1,596		544,513		—
Liabilities:
Derivative contracts, net of cash collateral3	403,947		190		403,757		—

1Residential mortgage loans held for sale measured at fair value on a recurring basis using significant unobservable inputs (Level 3) consist of residential mortgage loans intended for sale to U.S. government agencies that fail to meet conforming standards and are valued at 78.46% of the unpaid principal balance.

2A reconciliation of the beginning and ending fair value of mortgage servicing rights and disclosures of significant assumptions used to determine fair value are presented in Note 5, Mortgage Banking Activities.

3See Note 3 for detail of fair value of derivative contracts by contract type. Derivative contracts in asset and liability positions that were valued based on quoted prices in active markets for identical instruments (Level 1) are primarily exchange-traded interest rate derivative contracts held for trading purposes.

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The fair value of financial assets and liabilities measured on a recurring basis was as follows as of December 31, 2022 (in thousands):

	Total		Quoted Prices in Active Markets for Identical Instruments (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Trading securities:
U.S. government securities	$	9,823	$	4,970	$	4,853	$	—
Residential agency mortgage-backed securities	4,406,848		—		4,406,848		—
Municipal securities	21,484		—		21,484		—
Other trading securities	26,006		—		26,006		—
Total trading securities	4,464,161		4,970		4,459,191		—
Available for sale securities:
U.S. Treasury	898		898		—		—
Municipal securities	624,500		—		624,500		—
Residential agency mortgage-backed securities	5,814,496		—		5,814,496		—
Residential non-agency mortgage-backed securities	577,576		—		577,576		—
Commercial agency mortgage-backed securities	4,475,917		—		4,475,917		—
Other debt securities	473		—		—		473
Total available for sale securities	11,493,860		898		11,492,489		473
Fair value option securities — Residential agency mortgage-backed securities	296,590		—		296,590		—
Residential mortgage loans held for sale1	75,272		—		68,054		7,218
Mortgage servicing rights2	277,608		—		—		277,608
Derivative contracts, net of cash collateral3	880,343		2,110		878,233		—
Liabilities:
Derivative contracts, net of cash collateral3	554,900		16		554,884		—

1Residential mortgage loans held for sale measured at fair value on a recurring basis using significant unobservable inputs (Level 3) consist of residential mortgage loans intended for sale to U.S. government agencies that fail to meet conforming standards and are valued at 77.55% of the unpaid principal balance.

2A reconciliation of the beginning and ending fair value of mortgage servicing rights and disclosures of significant assumptions used to determine fair value are presented in Note 5, Mortgage Banking Activities.

3See Note 3 for detail of fair value of derivative contracts by contract type. Derivative contracts in asset and liability positions that were valued based on quoted prices in active markets for identical instruments (Level 1) are primarily exchange-traded interest rate derivative contracts held for trading purposes.

- 88 -

Following is a description of the Company's valuation methodologies used for assets and liabilities measured on a recurring basis:

Securities

The fair values of trading, available for sale and fair value option securities are based on quoted prices for identical instruments in active markets, when available. If quoted prices for identical instruments are not available, fair values are based on significant other observable inputs such as quoted prices of comparable instruments or interest rates and credit spreads, yield curves, volatilities, prepayment speeds and loss severities. The Company has elected to carry all residential mortgage-backed securities guaranteed by U.S. government agencies held as economic hedges against changes in the fair value of mortgage servicing rights at fair value with changes in the fair value recognized in earnings.

The fair value of certain available for sale municipal and other debt securities may be based on significant unobservable inputs. These significant unobservable inputs include limited observed trades, projected cash flows, current credit rating of the issuers and, when applicable, the insurers of the debt and observed trades of similar debt. Discount rates are primarily based on references to interest rate spreads on comparable 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 securities. A summary of significant inputs used to value these securities follows. A management committee composed of senior members from the Company's Corporate Treasury, Risk Management and Finance departments assesses the appropriateness of these inputs quarterly.

Derivatives

All derivative instruments are carried on the balance sheet at fair value. Fair values for exchange-traded contracts are based on quoted prices. Fair values for over-the-counter interest rate, commodity and foreign exchange contracts are based on valuations provided either by third-party dealers in the contracts, quotes provided by independent pricing services, or a third-party provided pricing model that uses significant other observable market inputs.

Credit risk is considered in determining the fair value of derivative instruments. Management determines fair value adjustments based on various risk factors including, but not limited to, current fair value, probability of default and loss given default.

We also consider our own credit risk in determining the fair value of derivative contracts. Changes in our credit rating would affect the fair value of our derivative liabilities. In the event of a credit downgrade, the fair value of our derivative liabilities would increase.

Residential Mortgage Loans Held for Sale

Residential mortgage loans held for sale are carried on the balance sheet at fair value. The Company has elected to carry all residential mortgage loans originated for sale at fair value. Changes in the fair value of these financial instruments are recognized in earnings. The fair values of residential mortgage loans held for sale are based upon quoted market prices of such loans sold in securitization transactions, including related unfunded loan commitments and forward sales contracts. The fair value of mortgage loans that were unable to be sold to U.S. government agencies were determined using quoted prices of loans that are sold in securitization transactions with a liquidity discount applied.

- 89 -

Fair Value of Assets and Liabilities Measured on a Non-Recurring Basis

Assets measured at fair value on a non-recurring basis include collateral for certain nonaccruing loans and real property and other assets acquired to satisfy loans, which are based primarily on comparisons to completed sales of similar assets.

The following represents the carrying value of assets measured at fair value on a non-recurring basis (and related losses) during the period. The carrying value represents only those assets with a balance at September 30, 2023 for which the fair value was adjusted during the nine months ended September 30, 2023 (in thousands):

							Fair Value Adjustments for the
	Carrying Value at September 30, 2023						Three Months Ended Sep. 30, 2023 Recognized in:				Nine Months Ended Sep. 30, 2023 Recognized in:
	Quoted Prices in Active Markets for Identical Instruments		Significant Other Observable Inputs		Significant Unobservable Inputs		Gross charge-offs against allowance for loan losses		Other gains (losses), net		Gross charge-offs against allowance for loan losses		Other gains (losses), net
Nonaccruing loans	$	—	$	—	$	796	$	2,135	$	—	$	4,932	$	—

The following represents the carrying value of assets measured at fair value on a non-recurring basis (and related losses) during the period. The carrying value represents only those assets with a balance at September 30, 2022 for which the fair value was adjusted during the nine months ended September 30, 2022 (in thousands):

							Fair Value Adjustments for the
	Carrying Value at September 30, 2022						Three Months Ended Sep. 30, 2022 Recognized in:				Nine Months Ended Sep. 30, 2022 Recognized in:
	Quoted Prices in Active Markets for Identical Instruments		Significant Other Observable Inputs		Significant Unobservable Inputs		Gross charge-offs against allowance for loan losses		Other gains (losses), net		Gross charge-offs against allowance for loan losses		Other gains (losses), net
Nonaccruing loans	$	—	$	159	$	126	$	22	$	—	$	499	$	—
Real estate and other repossessed assets	—		649		1,699		—		—		—		(5,705)

The fair value of collateral-dependent nonaccruing loans secured by real estate and real estate and other repossessed assets and the related fair value adjustments are generally based on unadjusted third-party appraisals. Our appraisal review policies require appraised values to be supported by observed inputs derived principally from or corroborated by observable market data. Appraisals that are not based on observable inputs or that require significant adjustments or fair value measurements that are not based on third-party appraisals are considered to be based on significant unobservable inputs. Non-recurring fair value measurements of collateral-dependent nonaccruing loans and real estate and other repossessed assets based on significant unobservable inputs are generally due to estimates of current fair values between appraisal dates. Significant unobservable inputs include listing prices for the same or comparable assets, uncorroborated expert opinions or management's knowledge of the collateral or industry. Non-recurring fair value measurements of collateral dependent loans secured by mineral rights are generally determined by our internal staff of engineers on projected cash flows under current market conditions and are based on significant unobservable inputs. Projected cash flows are discounted according to risk characteristics of the underlying oil and gas properties. Assets are evaluated to demonstrate with reasonable certainty that crude oil, natural gas and natural gas liquids can be recovered from known oil and gas reservoirs under existing economic and operating conditions at current prices with existing conventional equipment, operating methods and costs. Significant unobservable inputs are developed by asset management and workout professionals and approved by senior Credit Administration executives.

- 90 -

A summary of quantitative information about Non-recurring Fair Value Measurements based on Significant Unobservable Inputs (Level 3) as of September 30, 2023 follows (dollars in thousands):

	Fair Value		Valuation Technique(s)	Unobservable Input	Range (Weighted Average)
Nonaccruing loans	$	796	Discounted cash flows	Management knowledge of industry and non-real estate collateral	12% - 14% (14%)1

1    Represents fair value as a percentage of the unpaid principal balance.    

A summary of quantitative information about Non-recurring Fair Value Measurements based on Significant Unobservable Inputs (Level 3) as of September 30, 2022 follows (dollars in thousands):

	Fair Value		Valuation Technique(s)	Unobservable Input	Range (Weighted Average)
Nonaccruing loans	$	126	Discounted cash flows	Management knowledge of industry and non-real estate collateral including, but not limited to, recoverable oil and gas reserves, forward-looking commodity prices, estimated operating costs	25% - 25% (25%)1
Real estate and other repossessed assets	1,699		Discounted cash flows	Management knowledge of industry and non-real estate collateral	N/A

1    Represents fair value as a percentage of the unpaid principal balance.

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Fair Value of Financial Instruments

The following table presents the carrying values and estimated fair values of all financial instruments, including those financial assets and liabilities that are not measured and reported at fair value on a recurring basis or are measured at fair value on a non-recurring basis as of September 30, 2023 (in thousands):

	Carrying Value		Estimated Fair Value		Quoted Prices in Active Markets for Identical Instruments (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Cash and due from banks	$	854,161	$	854,161	$	854,161	$	—	$	—
Interest-bearing cash and cash equivalents	520,774		520,774		520,774		—		—
Trading securities:
U.S. government securities	18,843		18,843		17,932		911		—
Residential agency mortgage-backed securities	4,653,161		4,653,161		—		4,653,161		—
Municipal securities	51,998		51,998		—		51,998		—
Other trading securities	24,099		24,099		—		24,099		—
Total trading securities	4,748,101		4,748,101		17,932		4,730,169		—
Investment securities:
Municipal securities	121,003		122,695		—		11,957		110,738
Residential agency mortgage-backed securities	2,146,133		1,901,143		—		1,901,143		—
Commercial agency mortgage-backed securities	15,838		14,371		—		14,371		—
Other debt securities	15,788		14,158		—		14,158		—
Total investment securities	2,298,762		2,052,367		—		1,941,629		110,738
Allowance for credit losses	(344)		—		—		—		—
Investment securities, net of allowance	2,298,418		2,052,367		—		1,941,629		110,738
Available for sale securities:
U.S. Treasury	897		897		897		—		—
Municipal securities	488,269		488,269		—		488,269		—
Residential agency mortgage-backed securities	6,216,955		6,216,955		—		6,216,955		—
Residential non-agency mortgage-backed securities	715,806		715,806		—		715,806		—
Commercial agency mortgage-backed securities	4,484,247		4,484,247		—		4,484,247		—
Other debt securities	473		473		—		—		473
Total available for sale securities	11,906,647		11,906,647		897		11,905,277		473
Fair value option securities — Residential agency mortgage-backed securities	20,215		20,215		—		20,215		—
Residential mortgage loans held for sale	72,489		72,489		—		65,179		7,310
Loans:
Commercial	14,719,839		14,603,075		—		—		14,603,075
Commercial real estate	5,241,300		5,094,865		—		—		5,094,865
Loans to individuals	3,762,879		3,512,686		—		—		3,512,686
Total loans	23,724,018		23,210,626		—		—		23,210,626
Allowance for loan losses	(272,114)		—		—		—		—
Loans, net of allowance	23,451,904		23,210,626		—		—		23,210,626
Mortgage servicing rights	311,382		311,382		—		—		311,382
Derivative instruments with positive fair value, net of cash collateral	546,109		546,109		1,596		544,513		—
Deposits with no stated maturity	30,725,335		30,725,335		—		—		30,725,335
Time deposits	2,927,217		2,986,307		—		—		2,986,307
Other borrowed funds	8,924,642		8,922,567		—		—		8,922,567
Subordinated debentures	131,152		116,911		—		116,911		—
Derivative instruments with negative fair value, net of cash collateral	403,947		403,947		190		403,757		—

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The following table presents the carrying values and estimated fair values of all financial instruments, including those financial assets and liabilities that are not measured and reported at fair value on a recurring basis or are measured at fair value on a non-recurring basis as of December 31, 2022 (in thousands):

	Carrying Value		Estimated Fair Value		Quoted Prices in Active Markets for Identical Instruments (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Cash and due from banks	$	943,810	$	943,810	$	943,810	$	—	$	—
Interest-bearing cash and cash equivalents	457,906		457,906		457,906		—		—
Trading securities:
U.S. government securities	9,823		9,823		4,970		4,853		—
Residential agency mortgage-backed securities	4,406,848		4,406,848		—		4,406,848		—
Municipal securities	21,484		21,484		—		21,484		—
Other trading securities	26,006		26,006		—		26,006		—
Total trading securities	4,464,161		4,464,161		4,970		4,459,191		—
Investment securities:
Municipal securities	170,629		176,621		—		38,106		138,515
Residential agency mortgage-backed securities	2,315,219		2,143,360		—		2,143,360		—
Commercial agency mortgage-backed securities	15,609		14,588		—		14,588		—
Other debt securities	12,788		12,199		—		12,199		—
Total investment securities	2,514,245		2,346,768		—		2,208,253		138,515
Allowance for credit losses	(558)		—		—		—		—
Investment securities, net of allowance	2,513,687		2,346,768		—		2,208,253		138,515
Available for sale securities:
U.S. Treasury	898		898		898		—		—
Municipal securities	624,500		624,500		—		624,500		—
Residential agency mortgage-backed securities	5,814,496		5,814,496		—		5,814,496		—
Residential non-agency mortgage-backed securities	577,576		577,576		—		577,576		—
Commercial agency mortgage-backed securities	4,475,917		4,475,917		—		4,475,917		—
Other debt securities	473		473		—		—		473
Total available for sale securities	11,493,860		11,493,860		898		11,492,489		473
Fair value option securities — Residential agency mortgage-backed securities	296,590		296,590		—		296,590		—
Residential mortgage loans held for sale	75,272		75,272		—		68,054		7,218
Loans:
Commercial	14,212,499		13,905,765		—		—		13,905,765
Commercial real estate	4,606,777		4,454,048		—		—		4,454,048
Loans to individuals	3,737,874		3,531,410		—		—		3,531,410
Total loans	22,557,150		21,891,223		—		—		21,891,223
Allowance for loan losses	(235,704)		—		—		—		—
Loans, net of allowance	22,321,446		21,891,223		—		—		21,891,223
Mortgage servicing rights	277,608		277,608		—		—		277,608
Derivative instruments with positive fair value, net of cash collateral	880,343		880,343		2,110		878,233		—
Deposits with no stated maturity	33,018,863		33,018,863		—		—		33,018,863
Time deposits	1,461,842		1,431,245		—		—		1,431,245
Other borrowed funds	7,007,285		7,005,305		—		—		7,005,305
Subordinated debentures	131,205		121,497		—		121,497		—
Derivative instruments with negative fair value, net of cash collateral	554,900		554,900		16		554,884		—

Because no market exists for certain of these financial instruments and management does not intend to sell these financial instruments, the fair values shown in the tables above may not represent values at which the respective financial instruments could be sold individually or in the aggregate at the given reporting date.

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(12) Subsequent Events

The Company evaluated events from the date of the consolidated financial statements on September 30, 2023 through the issuance of those consolidated financial statements included in this Quarterly Report on Form 10-Q. No events were identified requiring recognition in and/or disclosure in the consolidated financial statements.

- 94 -

Nine-Month Financial Summary – Unaudited

Consolidated Daily Average Balances, Average Yields and Rates

(In thousands, except per share data)	Nine Months Ended
	September 30, 2023						September 30, 2022
	Average Balance		Revenue/ Expense		Yield/ Rate		Average Balance		Revenue/ Expense		Yield/ Rate
Assets
Interest-bearing cash and cash equivalents	$	641,203	$	24,257	5.06	%	$	879,657	$	5,730	0.87	%
Trading securities	4,259,291		147,256		4.61	%	5,274,507		86,822		1.99	%
Investment securities	2,403,984		25,985		1.44	%	1,142,177		15,267		1.78	%
Available for sale securities	11,900,049		283,199		3.00	%	11,875,378		176,044		1.92	%
Fair value option securities	194,913		7,561		5.11	%	55,597		1,214		2.89	%
Restricted equity securities	371,871		21,013		7.53	%	168,656		5,194		4.11	%
Residential mortgage loans held for sale	72,021		3,305		5.98	%	153,350		4,637		4.04	%
Loans	22,929,972		1,198,263		6.99	%	21,044,363		651,764		4.14	%
Allowance for loan losses	(253,105)						(247,083)
Loans, net of allowance	22,676,867		1,198,263		7.06	%	20,797,280		651,764		4.19	%
Total earning assets	42,520,199		1,710,839		5.29	%	40,346,602		946,672		3.07	%
Receivable on unsettled securities sales	203,520						350,058
Cash and other assets	5,025,214						6,939,631
Total assets	$	47,748,933					$	47,636,291
Liabilities and equity
Interest-bearing deposits:
Transaction	$	18,810,872	$	362,593	2.58	%	$	21,107,446	$	48,063	0.30	%
Savings	919,644		1,781		0.26	%	969,280		284		0.04	%
Time	2,136,225		52,374		3.28	%	1,456,389		7,828		0.72	%
Total interest-bearing deposits	21,866,741		416,748		2.55	%	23,533,115		56,175		0.32	%
Funds purchased and repurchase agreements	2,713,195		89,103		4.39	%	1,338,711		7,751		0.77	%
Other borrowings	5,594,290		216,175		5.17	%	1,327,622		13,364		1.35	%
Subordinated debentures	131,156		6,609		6.74	%	131,215		4,452		4.54	%
Total interest-bearing liabilities	30,305,382		728,635		3.21	%	26,330,663		81,742		0.42	%
Non-interest bearing demand deposits	11,179,239						15,123,552
Due on unsettled securities purchases	396,776						409,598
Other liabilities	970,132						888,641
Total equity	4,897,404						4,883,837
Total liabilities and equity	$	47,748,933					$	47,636,291
Tax-equivalent Net Interest Revenue			$	982,204	2.08	%			$	864,930	2.65	%
Tax-equivalent Net Interest Revenue to Earning Assets					3.03	%					2.80	%
Less tax-equivalent adjustment			6,699						6,176
Net Interest Revenue			975,505						858,754
Provision for credit losses			40,000						15,000
Other operating revenue			585,066						446,171
Other operating expense			948,798						846,024
Income before taxes			571,773						443,901
Federal and state income taxes			123,162						92,000
Net income			448,611						351,901
Net income (loss) attributable to non-controlling interests			440						57
Net income attributable to BOK Financial Corp. shareholders			$	448,171					$	351,844
Earnings Per Average Common Share Equivalent:
Net income:
Basic			$	6.74					$	5.18
Diluted			$	6.74					$	5.18

Yield calculations are shown on a tax equivalent at the statutory federal and state rates for the periods presented. The yield calculations exclude security trades that have been recorded on trade date with no corresponding interest income and the unrealized gains and losses. The yield calculation also includes average loan balances for which the accrual of interest has been discontinued and are net of unearned income. Yield / rate calculations are generally based on the conventions that determine how interest income and expense is accrued.

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Quarterly Financial Summary – Unaudited

Consolidated Daily Average Balances, Average Yields and Rates

(In thousands, except per share data)	Three Months Ended
	September 30, 2023						June 30, 2023
	Average Balance		Revenue/ Expense		Yield/ Rate		Average Balance		Revenue/ Expense		Yield/ Rate
Assets
Interest-bearing cash and cash equivalents	$	598,734	$	8,199	5.43	%	$	708,475	$	9,552	5.41	%
Trading securities	5,444,587		65,301		4.76	%	4,274,803		47,882		4.50	%
Investment securities, net of allowance	2,331,595		8,309		1.43	%	2,408,122		8,659		1.44	%
Available for sale securities	11,925,800		99,238		3.11	%	12,033,597		94,849		3.00	%
Fair value option securities	41,741		552		4.61	%	245,469		3,116		5.07	%
Restricted equity securities	445,532		8,776		7.88	%	351,944		6,429		7.31	%
Residential mortgage loans held for sale	77,208		1,234		6.27	%	72,959		1,092		5.85	%
Loans	23,414,308		427,649		7.25	%	22,889,054		400,988		7.03	%
Allowance for loan losses	(267,205)						(252,890)
Loans, net of allowance	23,147,103		427,649		7.33	%	22,636,164		400,988		7.10	%
Total earning assets	44,012,300		619,258		5.49	%	42,731,533		572,567		5.29	%
Receivable on unsettled securities sales	268,344						163,903
Cash and other assets	5,038,908						5,012,671
Total assets	$	49,319,552					$	47,908,107
Liabilities and equity
Interest-bearing deposits:
Transaction	$	19,415,599	$	155,385	3.18	%	$	18,368,592	$	119,272	2.60	%
Savings	874,530		1,043		0.47	%	926,882		490		0.21	%
Time	2,839,947		28,380		3.96	%	2,076,037		16,904		3.27	%
Total interest-bearing deposits	23,130,076		184,808		3.17	%	21,371,511		136,666		2.56	%
Funds purchased and repurchase agreements	2,699,027		32,748		4.81	%	3,670,994		41,905		4.58	%
Other borrowings	6,968,309		96,271		5.48	%	5,275,291		67,316		5.12	%
Subordinated debentures	131,151		2,321		7.02	%	131,153		2,219		6.79	%
Total interest-bearing liabilities	32,928,563		316,148		3.81	%	30,448,949		248,106		3.27	%
Non-interest bearing demand deposits	10,157,821						10,998,201
Due on unsettled securities purchases	435,927						436,353
Other liabilities	891,675						1,079,692
Total equity	4,905,566						4,944,912
Total liabilities and equity	$	49,319,552					$	47,908,107
Tax-equivalent Net Interest Revenue			$	303,110	1.68	%			$	324,461	2.02	%
Tax-equivalent Net Interest Revenue to Earning Assets					2.69	%					3.00	%
Less tax-equivalent adjustment			2,214						2,200
Net Interest Revenue			300,896						322,261
Provision for credit losses			7,000						17,000
Other operating revenue			198,152						209,049
Other operating expense			324,313						318,673
Income before taxes			167,735						195,637
Federal and state income taxes			33,256						44,001
Net income			134,479						151,636
Net income (loss) attributable to non-controlling interests			(16)						328
Net income attributable to BOK Financial Corp. shareholders			$	134,495					$	151,308
Earnings Per Average Common Share Equivalent:
Basic			$	2.04					$	2.27
Diluted			$	2.04					$	2.27

Yield calculations are shown on a tax equivalent at the statutory federal and state rates for the periods presented. The yield calculations exclude security trades that have been recorded on trade date with no corresponding interest income and the unrealized gains and losses. The yield calculation also includes average loan balances for which the accrual of interest has been discontinued and are net of unearned income. Yield / rate calculations are generally based on the conventions that determine how interest income and expense is accrued.

- 96 -

(In thousands, except per share data)	Three Months Ended
	March 31, 2023						December 31, 2022
	Average Balance		Revenue /Expense		Yield / Rate		Average Balance		Revenue / Expense		Yield / Rate
Assets
Interest-bearing cash and cash equivalents	$	616,596	$	6,506	4.28	%	$	568,307	$	5,822	4.06	%
Trading securities	3,031,969		34,073		4.52	%	3,086,985		28,473		3.70	%
Investment securities, net of allowance	2,473,796		9,017		1.46	%	2,535,305		9,223		1.46	%
Available for sale securities	11,738,693		89,112		2.87	%	10,953,851		73,317		2.54	%
Fair value option securities	300,372		3,893		5.17	%	92,012		931		4.40	%
Restricted equity securities	316,724		5,808		7.34	%	216,673		3,088		5.70	%
Residential mortgage loans held for sale	65,769		979		5.79	%	98,613		1,390		5.56	%
Loans	22,476,247		369,626		6.67	%	21,976,004		331,649		5.99	%
Allowance for loan losses	(238,909)						(242,450)
Loans, net of allowance	22,237,338		369,626		6.74	%	21,733,554		331,649		6.06	%
Total earning assets	40,781,257		519,014		5.06	%	39,285,300		453,893		4.53	%
Receivable on unsettled securities sales	177,312						194,996
Cash and other assets	5,023,899						5,729,322
Total assets	$	45,982,468					$	45,209,618
Liabilities and equity
Interest-bearing deposits:
Transaction	$	18,639,900	$	87,936	1.91	%	$	18,898,315	$	60,893	1.28	%
Savings	958,443		248		0.10	%	969,275		205		0.08	%
Time	1,477,720		7,090		1.95	%	1,417,606		4,476		1.25	%
Total interest-bearing deposits	21,076,063		95,274		1.83	%	21,285,196		65,574		1.22	%
Funds purchased and repurchase agreements	1,759,237		14,450		3.33	%	1,046,447		5,407		2.05	%
Other borrowings	4,512,280		52,588		4.73	%	2,523,195		25,961		4.08	%
Subordinated debentures	131,166		2,069		6.40	%	131,180		2,038		6.16	%
Total interest-bearing liabilities	27,478,746		164,381		2.43	%	24,986,018		98,980		1.57	%
Non-interest bearing demand deposits	12,406,408						14,176,189
Due on unsettled securities purchases	316,738						575,957
Other liabilities	939,553						853,134
Total equity	4,841,023						4,618,320
Total liabilities and equity	$	45,982,468					$	45,209,618
Tax-equivalent Net Interest Revenue			$	354,633	2.63	%			$	354,913	2.96	%
Tax-equivalent Net Interest Revenue to Earning Assets					3.45	%					3.54	%
Less tax-equivalent adjustment			2,285						2,287
Net Interest Revenue			352,348						352,626
Provision for credit losses			16,000						15,000
Other operating revenue			177,865						197,086
Other operating expense			305,812						318,456
Income before taxes			208,401						216,256
Federal and state income taxes			45,905						47,864
Net income			162,496						168,392
Net income (loss) attributable to non-controlling interests			128						(37)
Net income attributable to BOK Financial Corp. shareholders			$	162,368					$	168,429
Earnings Per Average Common Share Equivalent:
Basic			$	2.43					$	2.51
Diluted			$	2.43					$	2.51

Yield calculations are shown on a tax equivalent at the statutory federal and state rates for the periods presented. The yield calculations exclude security trades that have been recorded on trade date with no corresponding interest income and the unrealized gains and losses. The yield calculation also includes average loan balances for which the accrual of interest has been discontinued and are net of unearned income. Yield / rate calculations are generally based on the conventions that determine how interest income and expense is accrued.

- 97 -

(In thousands, except per share data)	Three Months Ended
	September 30, 2022
	Average Balance		Revenue / Expense		Yield / Rate
Assets
Interest-bearing cash and cash equivalents	$	748,263	$	3,520	1.87	%
Trading securities	3,178,068		22,772		2.72	%
Investment securities, net of allowance	2,593,989		9,207		1.42	%
Available for sale securities	10,306,257		59,144		2.21	%
Fair value option securities	36,846		286		2.98	%
Restricted equity securities	173,656		2,703		6.23	%
Residential mortgage loans held for sale	132,685		1,684		5.05	%
Loans	21,599,232		265,997		4.89	%
Allowance for loan losses	(241,136)
Loans, net of allowance	21,358,096		265,997		4.94	%
Total earning assets	38,527,860		365,313		3.71	%
Receivable on unsettled securities sales	219,113
Cash and other assets	6,372,229
Total assets	$	45,119,202
Liabilities and equity
Interest-bearing deposits:
Transaction	$	19,556,806	$	31,266	0.63	%
Savings	978,596		135		0.05	%
Time	1,409,069		3,314		0.93	%
Total interest-bearing deposits	21,944,471		34,715		0.63	%
Funds purchased and repurchase agreements	800,759		1,445		0.72	%
Other borrowings	1,528,887		8,988		2.33	%
Subordinated debentures	131,199		1,677		5.07	%
Total interest-bearing liabilities	24,405,316		46,825		0.76	%
Non-interest bearing demand deposits	15,105,305
Due on unsettled securities purchases	331,428
Other liabilities	501,731
Total equity	4,775,422
Total liabilities and equity	$	45,119,202
Tax-equivalent Net Interest Revenue			$	318,488	2.95	%
Tax-equivalent Net Interest Revenue to Earning Assets					3.24	%
Less tax-equivalent adjustment			2,163
Net Interest Revenue			316,325
Provision for credit losses			15,000
Other operating revenue			189,698
Other operating expense			294,751
Income before taxes			196,272
Federal and state income taxes			39,681
Net income			156,591
Net income attributable to non-controlling interests			81
Net income attributable to BOK Financial Corp. shareholders			$	156,510
Earnings Per Average Common Share Equivalent:
Basic			$	2.32
Diluted			$	2.32

Yield calculations are shown on a tax equivalent at the statutory federal and state rates for the periods presented. The yield calculations exclude security trades that have been recorded on trade date with no corresponding interest income and the unrealized gains and losses. The yield calculation also includes average loan balances for which the accrual of interest has been discontinued and are net of unearned income. Yield / rate calculations are generally based on the conventions that determine how interest income and expense is accrued.

- 98 -

Quarterly Earnings Trends – Unaudited

(In thousands, except share and per share data)

	Three Months Ended
	Sep. 30, 2023		June 30, 2023		Mar. 31, 2023		Dec. 31, 2022		Sep. 30, 2022
Interest revenue	$	617,044	$	570,367	$	516,729	$	451,606	$	363,150
Interest expense	316,148		248,106		164,381		98,980		46,825
Net interest revenue	300,896		322,261		352,348		352,626		316,325
Provision for credit losses	7,000		17,000		16,000		15,000		15,000
Net interest revenue after provision for credit losses	293,896		305,261		336,348		337,626		301,325
Other operating revenue
Brokerage and trading revenue	62,312		65,006		52,396		63,008		61,006
Transaction card revenue	26,387		26,003		25,621		27,136		25,974
Fiduciary and asset management revenue	52,256		52,997		50,657		49,899		50,190
Deposit service charges and fees	27,676		27,100		25,968		26,429		28,703
Mortgage banking revenue	13,356		15,141		14,367		10,065		11,282
Other revenue	15,865		14,250		16,970		17,034		15,479
Total fees and commissions	197,852		200,497		185,979		193,571		192,634
Other gains (losses), net	1,474		12,618		2,251		8,427		979
Gain (loss) on derivatives, net	(9,010)		(8,159)		(1,344)		4,548		(17,009)
Loss on fair value option securities, net	(203)		(2,158)		(2,962)		(2,568)		(4,368)
Change in fair value of mortgage servicing rights	8,039		9,261		(6,059)		(2,904)		16,570
Gain (loss) on available for sale securities, net	—		(3,010)		—		(3,988)		892
Total other operating revenue	198,152		209,049		177,865		197,086		189,698
Other operating expense
Personnel	190,791		190,652		182,145		186,419		170,348
Business promotion	6,958		7,640		8,569		7,470		6,127
Charitable contributions to BOKF Foundation	23		1,142		—		2,500		—
Professional fees and services	13,224		12,777		13,048		18,365		14,089
Net occupancy and equipment	32,583		30,105		28,459		29,227		29,296
Insurance	7,996		6,974		7,315		4,677		4,306
Data processing and communications	45,672		45,307		44,802		43,048		41,743
Printing, postage and supplies	3,760		3,728		3,893		3,890		4,349
Amortization of intangible assets	3,474		3,474		3,391		3,736		3,943
Mortgage banking costs	8,357		8,300		5,782		9,016		9,504
Other expense	11,475		8,574		8,408		10,108		11,046
Total other operating expense	324,313		318,673		305,812		318,456		294,751
Net income before taxes	167,735		195,637		208,401		216,256		196,272
Federal and state income taxes	33,256		44,001		45,905		47,864		39,681
Net income	134,479		151,636		162,496		168,392		156,591
Net income (loss) attributable to non-controlling interests	(16)		328		128		(37)		81
Net income attributable to BOK Financial Corporation shareholders	$	134,495	$	151,308	$	162,368	$	168,429	$	156,510
Earnings per share:
Basic	$2.04		$2.27		$2.43		$2.51		$2.32
Diluted	$2.04		$2.27		$2.43		$2.51		$2.32
Average shares used in computation:
Basic	65,548,307		65,994,132		66,331,775		66,627,955		67,003,199
Diluted	65,548,307		65,994,132		66,331,775		66,627,955		67,004,623

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PART II. Other Information

Item 1. Legal Proceedings

See discussion of legal proceedings at Note 6 to the Consolidated Financial Statements.

Item 1A. Risk Factors

There are no material changes from the risk factors set forth under Part I, Item 1A. "Risk Factors" in the Company's Annual Report on Form 10-K for the year ended December 31, 2022, except as described below.

Recent events impacting the financial services industry could adversely affect BOK Financial's business.

Recent events affecting the financial services industry have generated significant market volatility among publicly traded bank holding companies with particular focus on regional banks. These events occurred following a period of rapidly rising interest rates, which resulted in unrealized losses in longer duration securities and loans held by banks as well as more competition for bank deposits. These recent events have, and may continue to, adversely impact the market price and volatility of the Company’s stock. Potentially adverse changes to laws or regulations governing banks and bank holding companies may occur, including but not limited to, increased regulatory scrutiny in the course of routine examinations or otherwise and new regulations directed towards banks of similar size, which could increase the costs of doing business. As a result of recent bank failures the FDIC proposed a special assessment to replenish the Deposit Insurance Fund. If finalized, the special assessment will increase FDIC insurance premiums above the recently increased levels which will result in higher costs.

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

The following table provides information with respect to purchases made by or on behalf of the Company or any "affiliated purchaser" (as defined in Rule 10b-18(a)(3) under the Securities Exchange Act of 1934), of the Company's common stock during the three months ended September 30, 2023.

Period	Total Number of Shares Purchased2	Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs1	Maximum Number of Shares that May Yet Be Purchased Under the Plans
July 1 to July 31, 2023	27,000	$	89.31	27,000	3,945,523
August 1 to August 31, 2023	402,500	$	84.61	402,500	3,543,023
September 1 to September 30, 2023	271,000	$	83.00	271,000	3,272,023
Total	700,500			700,500

1On November 1, 2022, the Company's board of directors authorized the Company to repurchase up to five million shares of the Company's common stock. As of September 30, 2023, the Company had repurchased 1,727,977 shares under this plan. Future repurchases of the Company's common stock will vary based on market conditions, regulatory limitations and other factors.

2The Company may repurchase mature shares from employees to cover the exercise price and taxes in connection with employee equity compensation.

Item 5. Other Information

Trading Plans

No Company director or officer (as defined in Exchange Act Rule 16a-1(f)) has adopted, modified or terminated any trading arrangements during the third quarter of 2023.

Certain of our officers or directors have made elections to participate in, and are participating in, our dividend reinvestment plan and 401(k) plan, and have made, and may from time to time make, elections to have shares withheld to cover withholding taxes on issuances of shares to such officers or directors, which may be designed to satisfy the affirmative defense conditions of Rule 10b5-1 under the Exchange Act or may constitute non-Rule 10b5-1 trading arrangements (as defined in Item 408(c) of Regulation S-K).

- 100 -

Item 6. Exhibits

31.1	Certification of Chief Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2	Certification of Chief Executive Officer and Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32	Certification of Chief Executive Officer and Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101	Interactive data files pursuant to Rule 405 of Regulation S-T: (i) the Consolidated Balance Sheets, (ii) the Consolidated Statements of Earnings, (iii) the Consolidated Statements of Changes in Equity, (iv) the Consolidated Statement of Cash Flows and (v) the Notes to Consolidated Financial Statements. The XBRL instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.
104	Cover Page Interactive Data File - (formatted as Inline XBRL and contained in Exhibit 101)

Items 3 and 4 are not applicable and have been omitted.

- 101 -

Signatures

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

BOK FINANCIAL CORPORATION

(Registrant)

Date:        November 1, 2023                                                                  

/s/ Martin E. Grunst

Martin E. Grunst

Executive Vice President and

Chief Financial Officer

/s/ Michael J. Rogers

Michael J. Rogers

Senior Vice President and

Chief Accounting Officer

- 102 -

EX-31.1

Exhibit 31.1

CERTIFICATION PURSUANT TO

SECTION 302

OF THE SARBANES-OXLEY ACT OF 2002

FOR THE CHIEF EXECUTIVE OFFICER

I, Stacy C. Kymes, President and Chief Executive Officer of BOK Financial Corporation (“BOK Financial”), certify that:

1.I have reviewed this Quarterly Report on Form 10-Q of BOK Financial;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

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

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

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

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

Date:  November 1, 2023

/s/ Stacy C. Kymes

Stacy C. Kymes

President

Chief Executive Officer

BOK Financial Corporation

EX-31.2

Exhibit 31.2

CERTIFICATION PURSUANT TO

SECTION 302

OF THE SARBANES-OXLEY ACT OF 2002

FOR THE CHIEF FINANCIAL OFFICER

I, Martin E. Grunst, Chief Financial Officer of BOK Financial Corporation (“BOK Financial”), certify that:

1.I have reviewed this Quarterly Report on Form 10-Q of BOK Financial;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

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

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

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

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

Date:  November 1, 2023 

/s/ Martin E. Grunst

Martin E. Grunst

Executive Vice President

Chief Financial Officer

BOK Financial Corporation

EX-32

Exhibit 32

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of BOK Financial Corporation (“BOK Financial”) on Form 10-Q for the fiscal period ending September 30, 2023 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), we, Stacy C. Kymes and Martin E. Grunst, Chief Executive Officer and Chief Financial Officer, respectively, of BOK Financial, certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that to our knowledge:

1.The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2.The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of BOK Financial as of, and for, the periods presented.

November 1, 2023

/s/ Stacy C. Kymes

Stacy C. Kymes

President

Chief Executive Officer

BOK Financial Corporation

/s/ Martin E. Grunst

Martin E. Grunst

Executive Vice President

Chief Financial Officer

BOK Financial Corporation

XML

Document And Entity Information	9 Months Ended
	Sep. 30, 2023 shares
Document and Entity Information [Abstract]
Entity Incorporation, State or Country Code	OK
Entity Tax Identification Number	73-1373454
Entity Address, Address Line One	Boston Avenue at Second Street
Entity Address, City or Town	Tulsa,
Entity Address, State or Province	OK
Document Transition Report	false
Document Quarterly Report	true
Entity Registrant Name	BOK FINANCIAL CORP
Entity Central Index Key	0000875357
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding	65,664,840
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q3
Document Type	10-Q
Entity File Number	001-37811
Amendment Flag	false
Document Period End Date	Sep. 30, 2023
City Area Code	918
Local Phone Number	588-6000
Entity Address, Postal Zip Code	74192
Current Fiscal Year End Date	--12-31
Title of 12(b) Security	Common Stock, par value $0.00006 per share
Trading Symbol	BOKF
Security Exchange Name	NASDAQ

XML

Consolidated Statements of Earnings (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Interest revenue [Abstract]
Loans	$ 425,662	$ 264,350	$ 1,192,714	$ 646,738
Residential mortgage loans held for sale	1,234	1,684	3,305	4,637
Trading securities	65,221	22,720	147,051	86,653
Investment securities	8,276	9,108	25,790	14,947
Available for sale securities	99,124	58,779	282,449	175,383
Fair value option securities	552	286	7,561	1,214
Restricted equity securities	8,776	2,703	21,013	5,194
Interest-bearing cash and cash equivalents	8,199	3,520	24,257	5,730
Total interest revenue	617,044	363,150	1,704,140	940,496
Interest expense [Abstract]
Deposits	184,808	34,715	416,748	56,175
Borrowed funds	129,019	10,433	305,278	21,115
Subordinated debentures	2,321	1,677	6,609	4,452
Total interest expense	316,148	46,825	728,635	81,742
Net interest revenue	300,896	316,325	975,505	858,754
Provision for credit losses	7,000	15,000	40,000	15,000
Net interest revenue after provision for credit losses	293,896	301,325	935,505	843,754
Total fees and commissions	197,852	192,634	584,328	463,642
Other gains (losses), net	1,474	979	16,343	(8,304)
Loss on derivatives, net	(9,010)	(17,009)	(18,513)	(77,559)
Loss on fair value option securities, net	(203)	(4,368)	(5,323)	(17,790)
Change in fair value of mortgage servicing rights	8,039	16,570	11,241	83,165
Gain (loss) on available for sale securities, net	0	892	(3,010)	3,017
Total other operating revenue	198,152	189,698	585,066	446,171
Other operating expense [Abstract]
Personnel	190,791	170,348	563,588	484,499
Business promotion	6,958	6,127	23,167	18,965
Charitable contributions to BOKF Foundation	23	0	1,165	0
Professional fees and services	13,224	14,089	39,049	37,977
Net occupancy and equipment	32,583	29,296	91,147	87,640
Insurance	7,996	4,306	22,285	13,317
Data processing and communications	45,672	41,743	135,781	122,859
Printing, postage and supplies	3,760	4,349	11,381	11,967
Amortization of intangible assets	3,474	3,943	10,339	11,956
Mortgage banking costs	8,357	9,504	22,439	26,818
Other expense	11,475	11,046	28,457	30,026
Total other operating expense	324,313	294,751	948,798	846,024
Net income before taxes	167,735	196,272	571,773	443,901
Federal and state income taxes	33,256	39,681	123,162	92,000
Net income	134,479	156,591	448,611	351,901
Net income (loss) attributable to non-controlling interests	(16)	81	440	57
Net income attributable to BOK Financial Corporation shareholders	$ 134,495	$ 156,510	$ 448,171	$ 351,844
Earnings Per Share [Abstract]
Basic	$ 2.04	$ 2.32	$ 6.74	$ 5.18
Diluted	$ 2.04	$ 2.32	$ 6.74	$ 5.18
Average shares used in computation: [Abstract]
Basic	65,548,307	67,003,199	65,955,294	67,409,789
Diluted	65,548,307	67,004,623	65,955,294	67,411,222
Dividends declared per share	$ 0.54	$ 0.53	$ 1.62	$ 1.59
Brokerage and trading revenue [Member]
Total fees and commissions	$ 62,312	$ 61,006	$ 179,714	$ 77,970
Transaction card revenue [Member]
Total fees and commissions	26,387	25,974	78,011	77,130
Fiduciary and asset management revenue [Member]
Total fees and commissions	52,256	50,190	155,910	146,427
Deposit service charges and fees [Member]
Total fees and commissions	27,676	28,703	80,744	84,207
Mortgage banking revenue [Member]
Total fees and commissions	13,356	11,282	42,864	39,300
Other revenue [Member]
Total fees and commissions	$ 15,865	$ 15,479	$ 47,085	$ 38,608

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Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 134,479	$ 156,591	$ 448,611	$ 351,901
Other Comprehensive Income (Loss), before Tax [Abstract]
Net change in unrealized gain (loss)	(135,614)	(412,084)	(171,977)	(1,293,661)
Reclassification Adjustments Included in Earnings [Abstract]
Interest revenue, Investment securities	14,912	21,675	46,996	24,130
Operating expense, Personnel	0	(3,483)	0	(3,483)
Loss (gain) on available for sale securities, net	0	(892)	3,010	(3,017)
Other comprehensive income (loss) before income taxes	(120,702)	(394,784)	(121,971)	(1,276,031)
Federal and state income taxes	(28,389)	(92,467)	(29,941)	(298,715)
Other comprehensive income (loss), net of income taxes	(92,313)	(302,317)	(92,030)	(977,316)
Comprehensive income (loss)	42,166	(145,726)	356,581	(625,415)
Comprehensive income (loss) attributable to non-controlling interests	(16)	81	440	57
Comprehensive income (loss) attributable to BOK Financial Corp. shareholders	$ 42,182	$ (145,807)	$ 356,141	$ (625,472)

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Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Assets [Abstract]
Cash and due from banks	$ 854,161	$ 943,810
Interest-bearing cash and cash equivalents	520,774	457,906
Trading securities	4,748,101	4,464,161
Investment securities, net of allowance	2,298,418	2,513,687
Available for sale securities	11,906,647	11,493,860
Fair value option securities	20,215	296,590
Restricted equity securities	435,112	299,651
Residential mortgage loans held for sale	72,489	75,272
Loans	23,724,018	22,557,150
Allowance for loan losses	(272,114)	(235,704)
Loans, net of allowance	23,451,904	22,321,446
Premises and equipment, net	616,439	565,175
Receivables	255,164	273,815
Goodwill	1,044,749	1,044,749
Intangible assets, net	65,804	76,131
Mortgage servicing rights	311,382	277,608
Real estate and other repossessed assets, net of allowance	3,753	14,304
Derivative contracts, net	546,109	880,343
Cash surrender value of bank-owned life insurance	406,623	406,751
Receivable on unsettled securities sales	28,707	31,004
Other assets	1,344,846	1,354,379
Total assets	48,931,397	47,790,642
Deposits [Abstract]
Non-interest bearing demand deposits	9,974,223	13,395,337
Interest-bearing deposits: [Abstract]
Transaction	19,897,179	18,659,115
Savings	853,933	964,411
Time	2,927,217	1,461,842
Total deposits	33,652,552	34,480,705
Funds purchased and repurchase agreements	2,722,998	2,270,377
Other borrowings	6,201,644	4,736,908
Subordinated debentures	131,152	131,205
Accrued interest, taxes and expense	244,105	296,870
Derivative contracts, net	403,947	554,900
Due on unsettled securities purchases	235,473	147,470
Other liabilities	522,318	484,849
Total liabilities	44,114,189	43,103,284
Shareholders' equity: [Abstract]
Common stock	5	5
Capital surplus	1,404,668	1,390,395
Retained earnings	5,164,597	4,824,164
Treasury stock	(826,266)	(694,960)
Accumulated other comprehensive income (loss)	(928,985)	(836,955)
Total shareholders' equity	4,814,019	4,682,649
Non-controlling interests	3,189	4,709
Total equity	4,817,208	4,687,358
Total liabilities and equity	$ 48,931,397	$ 47,790,642

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Consolidated Balance Sheets (Parenthetical) (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Investment securities [Abstract]
Investment Securities, Fair Value	$ 2,052,367	$ 2,346,768
Real estate and other repossessed assets, allowance	$ (4,247)	$ (10,115)
Shareholders' equity: [Abstract]
Common Stock, Par or Stated Value Per Share	$ 0.00006	$ 0.00006
Common Stock, Shares Authorized	2,500,000,000	2,500,000,000
Common Stock, Shares, Issued	(76,588,230)	(76,423,345)
Common Stock, Shares, Outstanding	(76,588,230)	(76,423,345)
Treasury stock, shares at cost (in shares)	10,923,390	9,464,711

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Consolidated Statements of Changes in Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Capital Surplus [Member]	Retained Earnings [Member]	Treasury Stock, Common	Accumulated Other Comprehensive Income (Loss) [Member]	Total Shareholders' Equity [Member]	Non-Controlling Interests [Member]
Balance, beginning of period (in shares) at Dec. 31, 2021		76,254			7,786
Balance, beginning of period at Dec. 31, 2021	$ 5,368,371	$ 5	$ 1,378,794	$ 4,447,691	$ (535,129)	$ 72,371	$ 5,363,732	$ 4,639
Net income	351,901			351,844			351,844	57
Other comprehensive income (loss)	(977,316)					(977,316)	(977,316)
Repurchase of common stock (in shares)					1,318
Repurchase of common stock	(122,458)				$ (122,458)		(122,458)
Stock options exercised (in shares)		1
Stock options exercised	37		37				37
Non-vested shares awarded, net (in shares)		150
Vesting of non-vested shares (in shares)					46
Vesting of non-vested shares	(4,944)				$ (4,944)		(4,944)
Share-based compensation	6,650		6,650				6,650
Cash dividends on common stock	(107,611)			(107,611)			(107,611)
Capital calls and distributions, net	(322)							(322)
Balance, end of period (in shares) at Sep. 30, 2022		76,405			9,150
Balance, end of period at Sep. 30, 2022	4,514,308	$ 5	1,385,481	4,691,924	$ (662,531)	(904,945)	4,509,934	4,374
Balance, beginning of period (in shares) at Jun. 30, 2022		76,408			8,602
Balance, beginning of period at Jun. 30, 2022	4,741,542	$ 5	1,381,676	4,570,837	$ (612,551)	(602,628)	4,737,339	4,203
Net income	156,591			156,510			156,510	81
Other comprehensive income (loss)	(302,317)					(302,317)	(302,317)
Repurchase of common stock (in shares)					548
Repurchase of common stock	(49,980)				$ (49,980)		(49,980)
Stock options exercised (in shares)		0
Stock options exercised	0		0				0
Non-vested shares awarded, net (in shares)		(3)
Vesting of non-vested shares (in shares)					0
Vesting of non-vested shares	0				$ 0		0
Share-based compensation	3,805		3,805				3,805
Cash dividends on common stock	(35,423)			(35,423)			(35,423)
Capital calls and distributions, net	90							90
Balance, end of period (in shares) at Sep. 30, 2022		76,405			9,150
Balance, end of period at Sep. 30, 2022	4,514,308	$ 5	1,385,481	4,691,924	$ (662,531)	(904,945)	4,509,934	4,374
Balance, beginning of period (in shares) at Dec. 31, 2022		76,423			9,465
Balance, beginning of period at Dec. 31, 2022	4,687,358	$ 5	1,390,395	4,824,164	$ (694,960)	(836,955)	4,682,649	4,709
Net income	448,611			448,171			448,171	440
Other comprehensive income (loss)	(92,030)					(92,030)	(92,030)
Repurchase of common stock (in shares)					1,413
Repurchase of common stock	(126,611)				$ (126,611)		(126,611)
Non-vested shares awarded, net (in shares)		165
Vesting of non-vested shares (in shares)					45
Vesting of non-vested shares	(4,695)				$ (4,695)		(4,695)
Share-based compensation	14,273		14,273				14,273
Cash dividends on common stock	(107,738)			(107,738)			(107,738)
Capital calls and distributions, net	(1,960)							(1,960)
Balance, end of period (in shares) at Sep. 30, 2023		76,588			10,923
Balance, end of period at Sep. 30, 2023	4,817,208	$ 5	1,404,668	5,164,597	$ (826,266)	(928,985)	4,814,019	3,189
Balance, beginning of period (in shares) at Jun. 30, 2023		76,592			10,223
Balance, beginning of period at Jun. 30, 2023	4,867,397	$ 5	1,401,509	5,065,733	$ (766,721)	(836,672)	4,863,854	3,543
Net income	134,479			134,495			134,495	(16)
Other comprehensive income (loss)	(92,313)					(92,313)	(92,313)
Repurchase of common stock (in shares)					700
Repurchase of common stock	(59,545)				$ (59,545)		(59,545)
Non-vested shares awarded, net (in shares)		(4)
Vesting of non-vested shares (in shares)					0
Vesting of non-vested shares	0				$ 0		0
Share-based compensation	3,159		3,159				3,159
Cash dividends on common stock	(35,631)			(35,631)			(35,631)
Capital calls and distributions, net	(338)							(338)
Balance, end of period (in shares) at Sep. 30, 2023		76,588			10,923
Balance, end of period at Sep. 30, 2023	$ 4,817,208	$ 5	$ 1,404,668	$ 5,164,597	$ (826,266)	$ (928,985)	$ 4,814,019	$ 3,189

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Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash Flows From Operating Activities: [Abstract]
Net income	$ 448,611	$ 351,901
Adjustments to reconcile net income to net cash used in operating activities: [Abstract]
Provision for credit losses	40,000	15,000
Change in fair value of mortgage servicing rights due to market assumption changes	(11,241)	(83,165)
Change in the fair value of mortgage servicing rights due to principal payments	21,031	24,277
Net unrealized (gains) losses from derivative contracts	(55,127)	(31,677)
Share-based compensation	14,273	6,650
Depreciation and amortization	81,002	80,215
Net amortization of discounts and premiums	(14,216)	8,676
Net losses (gains) on financial instruments and other losses (gains), net	(12,702)	5,285
Net loss (gain) on mortgage loans held for sale	4,306	795
Mortgage loans originated for sale	(527,136)	(1,039,313)
Proceeds from sale of mortgage loans held for sale	527,115	1,085,632
Capitalized mortgage servicing rights	(9,757)	(15,810)
Change in trading and fair value option securities	(7,477)	6,951,932
Change in receivables	14,079	41,705
Change in other assets	74,107	9,899
Change in other liabilities	(58,926)	(68,084)
Net cash provided by (used in) operating activities	527,942	7,343,918
Cash Flows From Investing Activities: [Abstract]
Proceeds from maturities or redemptions of investment securities	214,869	100,418
Proceeds from maturities or redemptions of available for sale securities	1,134,602	1,827,825
Purchases of investment securities	(2,504)	(10,000)
Purchases of available for sale securities	(1,843,827)	(2,716,590)
Proceeds from sales of available for sale securities	135,489	242,135
Change in amount receivable on unsettled available for sale securities transactions	7,471	(11,348)
Loans originated, net of principal collected	(1,168,401)	(1,572,461)
Net payments on derivative asset contracts	143,543	(35,198)
Net change in restricted equity securities	(135,461)	(17,243)
Proceeds from disposition of assets	36,993	17,759
Purchases of assets	(128,902)	(151,320)
Net cash provided by (used in) investing activities	(1,606,128)	(2,326,023)
Cash Flows From Financing Activities: [Abstract]
Net change in demand deposits, transaction deposits and savings accounts	(2,293,528)	(4,580,959)
Net change in time deposits	1,465,375	(245,185)
Net change in other borrowed funds	1,906,678	(1,528,634)
Net proceeds on derivative liability contracts	(153,692)	15,215
Net change in derivative margin accounts	312,397	271,418
Change in amount due on unsettled available for sale securities transactions	53,219	56,725
Issuance of common and treasury stock, net	(4,695)	(4,907)
Repurchase of common stock	(126,611)	(122,458)
Dividends paid	(107,738)	(107,611)
Net cash provided by (used in) financing activities	1,051,405	(6,246,396)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	(26,781)	(1,228,501)
Cash and cash equivalents at beginning of period	1,401,716	2,837,410
Cash and cash equivalents at end of period	1,374,935	1,608,909
Supplemental Cash Flow Information: [Abstract]
Cash paid for interest	706,011	80,759
Cash paid for taxes	156,092	67,147
Net loans and bank premises transferred to repossessed real estate and other assets	367	12,314
Transfer of available for sale securities to investment securities	0	2,454,273
Residential mortgage loans guaranteed by U.S. government agencies that became eligible for repurchase during the period	10,679	27,317
Conveyance of other real estate owned guaranteed by U.S. government agencies	4,007	5,882
Right-of-use assets obtained in exchange for operating lease liabilities	$ 65,241	$ 21,198

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Significant Accounting Policies

9 Months Ended

Sep. 30, 2023

Accounting Policies [Abstract]

Significant Accounting Policies [Text Block]

Basis of Presentation

The accompanying unaudited consolidated financial statements of BOK Financial Corporation ("BOK Financial" or "the Company") have been prepared in accordance with accounting principles for interim financial information generally accepted in the United States and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included.

The unaudited consolidated financial statements include accounts of BOK Financial and its subsidiaries, principally BOKF, NA ("the Bank"), BOK Financial Securities, Inc., and BOK Financial Private Wealth, Inc. Operating divisions of the Bank include Bank of Albuquerque, Bank of Oklahoma, Bank of Texas, BOK Financial in Arizona, Arkansas, Colorado and Kansas/Missouri, BOK Financial Mortgage and the TransFund electronic funds network.

Certain reclassifications have been made to conform to the current period presentation.

The financial information should be read in conjunction with BOK Financial's 2022 Form 10-K filed with the Securities and Exchange Commission, which contains audited financial statements. Amounts presented as of December 31, 2022 have been derived from the audited financial statements included in BOK Financial's 2022 Form 10-K but do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. Operating results for the nine-month period ended September 30, 2023 are not necessarily indicative of the results that may be expected for the year ending December 31, 2023.

Newly Adopted and Pending Accounting Policies

Financial Accounting Standards Board ("FASB")

FASB Accounting Standards Update No. 2022-02, Financial Instruments - Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures ("ASU 2022-02")

On March 31, 2022, the FASB issued ASU 2022-02 which eliminates the accounting guidance on troubled debt restructurings ("TDRs") for creditors in ASC 310-40, while also no longer requiring an entity to consider renewals, modifications, and extensions that result from reasonably expected TDRs in their calculation of the allowance for credit losses. For receivables for which there has been a modification in their contractual cash flows, ASU 2022-02 requires disclosure, by class of financing receivable, of the types of modifications, the financial effects of those modifications, and the performance of these modified receivables, along with receivables that had a payment default during the current period and had modifications to the contractual cash flows within 12 months prior to the default. Further, ASU 2022-02 requires entities to disclose gross write-offs recorded in the current period by year of origination in the vintage disclosures on a year-to-date basis. ASU 2022-02 was effective for the Company January 1, 2023. Amendments related to TDR recognition and measurement and vintage disclosures were applied prospectively and are included in Note 4 to the consolidated financial statements. Adoption of this standard did not have a material effect on the Company's financial condition or results of operations.

FASB Accounting Standards Update No. 2023-01, Leases (Topic 842): Common Control Arrangements ("ASU 2023-01")

On March 27, 2023, the FASB issued ASU 2023-01 which, in part, amends the accounting for leasehold improvement in common-control arrangements. Under previous guidance, a lessee is generally required to amortize leasehold improvements that it owns over the shorter of the useful life of those improvements or the lease term. However, due to the nature of leasehold improvements made under leases between entities under common control, ASU 2023-01 requires a lessee in a common-control arrangement to amortize such leasehold improvements that it owns over the improvements' useful life to the common control group, regardless of the lease term. ASU 2023-01 is effective for fiscal years beginning after December 15, 2023, including interim periods within those fiscal years. Adoption of ASU 2023-01 is not expected to have a material impact on the Company's financial statements.

FASB Accounting Standards Update No. 2023-02, Investments - Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method ("ASU 2023-02")On March 29, 2023, the FASB issued ASU 2023-02 which amends previous guidance to allow entities to account for qualifying tax equity investments using the proportional amortization method regardless of the program giving rise to the related income tax credits, as opposed to only being allowed to apply this method to qualifying tax equity investments in low-income housing tax credit structures as was the case under previous guidance. ASU 2023-02 is effective for fiscal years beginning after December 15, 2023, including interim periods within those fiscal years. On June 30, 2023, the Company early adopted ASU 2023-02 as of January 1, 2023 using the modified retrospective approach, which did not have a material impact on the Company's financial statements. The Company transitioned from the equity method of accounting and began applying the proportional amortization method of accounting to its qualifying new markets tax credit and historic tax credit investments in addition to its low income housing tax credit partnerships already subject to the proportional amortization method.

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Securities

9 Months Ended

Sep. 30, 2023

Marketable Securities [Abstract]

Securities [Text Block]

Securities

Trading Securities

The fair value and net unrealized gain (loss) included in trading securities are as follows (in thousands):

	September 30, 2023				December 31, 2022
	Fair Value		Net Unrealized Gain (Loss)		Fair Value		Net Unrealized Gain (Loss)
U.S. government securities	$	18,843	$	8	$	9,823	$	(16)
Residential agency mortgage-backed securities	4,653,161		(107,212)		4,406,848		4
Municipal securities	51,998		(1,175)		21,484		(136)
Other trading securities	24,099		120		26,006		(175)
Total trading securities	$	4,748,101	$	(108,259)	$	4,464,161	$	(323)

Investment Securities

The amortized cost and fair values of investment securities are as follows (in thousands):

	September 30, 2023
	Amortized		Carrying		Fair		Gross Unrealized
	Cost		Value1		Value		Gain		Loss
Municipal securities	$	121,003	$	121,003	$	122,695	$	2,882	$	(1,190)
Mortgage-backed securities:
Residential agency	2,322,710		2,146,133		1,901,143		95		(245,085)
Commercial agency	17,258		15,838		14,371		—		(1,467)
Other debt securities	15,788		15,788		14,158		—		(1,630)
Total investment securities	2,476,759		2,298,762		2,052,367		2,977		(249,372)
Allowance for credit losses	(344)		(344)		—		—		—
Investment securities, net of allowance	$	2,476,415	$	2,298,418	$	2,052,367	$	2,977	$	(249,372)

1    Carrying value includes $178 million of net unrealized loss which remains in Accumulated other comprehensive income ("AOCI") in the Consolidated Balance Sheets related to certain securities transferred during the second quarter of 2022 from the Available for Sale securities portfolio to the Investment securities portfolio.

	December 31, 2022
	Amortized		Carrying		Fair		Gross Unrealized
	Cost		Value1		Value		Gain		Loss
Municipal securities	$	170,629	$	170,629	$	176,621	$	6,456	$	(464)
Mortgage-backed securities:
Residential agency	2,538,565		2,315,219		2,143,360		155		(172,014)
Commercial agency	17,259		15,609		14,588		—		(1,021)
Other debt securities	12,788		12,788		12,199		—		(589)
Total investment securities	2,739,241		2,514,245		2,346,768		6,611		(174,088)
Allowance for credit losses	(558)		(558)		—		—		—
Investment securities, net of allowance	$	2,738,683	$	2,513,687	$	2,346,768	$	6,611	$	(174,088)

1    Carrying value includes $225 million of net unrealized loss which remains in AOCI in the Consolidated Balance Sheets related to certain securities transferred during the second quarter of 2022 from the Available for Sale securities portfolio to the Investment securities portfolio.

The amortized cost and fair values of investment securities at September 30, 2023, by contractual maturity, are as shown in the following table (dollars in thousands):

	Less than One Year		One to Five Years		Six to Ten Years		Over Ten Years		Total		Weighted Average Maturity1
Fixed maturity debt securities:
Carrying value	$	17,756	$	100,534	$	34,326	$	13	$	152,629	3.53
Fair value	17,804		102,168		31,239		13		151,224
Residential mortgage-backed securities:
Carrying value									$	2,146,133	2
Fair value									1,901,143
Total investment securities:
Carrying value									$	2,298,762
Fair value									2,052,367

1Expected maturities may differ from contractual maturities, because borrowers may have the right to call or prepay obligations with or without penalty.

2The average expected lives of residential mortgage-backed securities were 5.3 years based upon current prepayment assumptions.

Temporarily Impaired Investment Securities

(dollars in thousands):

	September 30, 2023
	Number of Securities	Less Than 12 Months				12 Months or Longer				Total
		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Investment:
Municipal securities	59	$	28,962	$	601	$	6,200	$	589	$	35,162	$	1,190
Mortgage-backed securities:
Residential agency	116	—		—		1,900,066		245,085		1,900,066		245,085
Commercial agency	2	—		—		14,371		1,467		14,371		1,467
Other debt securities	3	—		—		8,645		1,630		8,645		1,630
Total investment securities	180	$	28,962	$	601	$	1,929,282	$	248,771	$	1,958,244	$	249,372

	December 31, 2022
	Number of Securities	Less Than 12 Months				12 Months or Longer				Total
		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Investment:
Municipal securities	22	$	18,037	$	406	$	544	$	58	$	18,581	$	464
Mortgage-backed securities:
Residential agency	116	2,142,114		172,014		—		—		2,142,114		172,014
Commercial agency	2	14,588		1,021		—		—		14,588		1,021
Other debt securities	3	9,428		571		257		18		9,685		589
Total investment securities	143	$	2,184,167	$	174,012	$	801	$	76	$	2,184,968	$	174,088

Available for Sale Securities 

The amortized cost and fair value of available for sale securities are as follows (in thousands):

	September 30, 2023
	Amortized		Fair		Gross Unrealized
	Cost		Value		Gain		Loss
U.S. Treasury	$	1,000	$	897	$	—	$	(103)
Municipal securities	545,940		488,269		—		(57,671)
Mortgage-backed securities:
Residential agency	6,686,602		6,216,955		162		(469,809)
Residential non-agency	774,074		715,806		9,830		(68,098)
Commercial agency	4,933,051		4,484,247		37		(448,841)
Other debt securities	500		473		—		(27)
Total available for sale securities	$	12,941,167	$	11,906,647	$	10,029	$	(1,044,549)

	December 31, 2022
	Amortized		Fair		Gross Unrealized
	Cost		Value		Gain		Loss
U.S. Treasury	$	1,000	$	898	$	—	$	(102)
Municipal securities	687,875		624,500		321		(63,696)
Mortgage-backed securities:
Residential agency	6,161,358		5,814,496		13,085		(359,947)
Residential non-agency	616,423		577,576		11,776		(50,623)
Commercial agency	4,892,257		4,475,917		3,479		(419,819)
Other debt securities	500		473		—		(27)
Total available for sale securities	$	12,359,413	$	11,493,860	$	28,661	$	(894,214)

The amortized cost and fair values of available for sale securities at September 30, 2023, by contractual maturity, are as shown in the following table (dollars in thousands):

	Less than One Year		One to Five Years		Six to Ten Years		Over Ten Years		Total		Weighted Average Maturity1
Fixed maturity debt securities:
Amortized cost	$	347,874	$	3,048,923	$	1,554,983	$	528,711	$	5,480,491	5.58
Fair value	341,476		2,759,574		1,382,272		490,564		4,973,886
Residential mortgage-backed securities:
Amortized cost									$	7,460,676	2
Fair value									6,932,761
Total available for sale securities:
Amortized cost									$	12,941,167
Fair value									11,906,647

1Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without penalty.

2The average expected lives of residential mortgage-backed securities were 4.4 years based upon current prepayment assumptions.

Sales of available for sale securities resulted in gains and losses as follows (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Proceeds	$	—	$	30,834	$	135,489	$	242,135
Gross realized gains	—		1,116		703		4,510
Gross realized losses	—		(224)		(3,713)		(1,493)
Related federal and state income tax expense (benefit)	—		209		(708)		706

The fair value of debt securities pledged as collateral for repurchase agreements, public trust funds on deposit and for other purposes, as required by law was $13.1 billion at September 30, 2023 and $11.2 billion at December 31, 2022. The secured parties do not have the right to sell or repledge these securities.

Temporarily Impaired Available for Sale Securities

(Dollars in thousands)

	September 30, 2023
	Number of Securities	Less Than 12 Months				12 Months or Longer				Total
		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Available for sale:
U.S. Treasury	1	$	—	$	—	$	897	$	103	$	897	$	103
Municipal securities	191	7,688		606		480,582		57,065		488,270		57,671
Mortgage-backed securities:
Residential agency	752	2,276,744		55,455		3,879,833		414,354		6,156,577		469,809
Residential non-agency	39	269,254		7,317		431,379		60,781		700,633		68,098
Commercial agency	302	821,238		20,920		3,622,841		427,921		4,444,079		448,841
Other debt securities	1	—		—		473		27		473		27
Total available for sale securities	1,286	$	3,374,924	$	84,298	$	8,416,005	$	960,251	$	11,790,929	$	1,044,549

	December 31, 2022
	Number of Securities	Less Than 12 Months				12 Months or Longer				Total
		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Available for sale:
U.S. Treasury	1	$	—	$	—	$	899	$	102	$	899	$	102
Municipal securities	227	146,634		5,301		428,248		58,395		574,882		63,696
Mortgage-backed securities:
Residential agency	613	3,879,582		256,973		863,732		102,974		4,743,314		359,947
Residential non-agency	26	499,716		50,623		—		—		499,716		50,623
Commercial agency	285	1,647,778		63,701		2,535,816		356,118		4,183,594		419,819
Other debt securities	1	—		—		473		27		473		27
Total available for sale securities	1,153	$	6,173,710	$	376,598	$	3,829,168	$	517,616	$	10,002,878	$	894,214

Based on evaluations of impaired securities as of September 30, 2023, the Company does not intend to sell any impaired available for sale debt securities before fair value recovers to the current amortized cost, and it is more-likely-than-not that the Company will not be required to sell impaired securities before fair value recovers, which may be maturity.

Fair Value Option Securities

Fair value option securities represent securities which the Company has elected to carry at fair value and are separately identified on the Consolidated Balance Sheets. Changes in the fair value are recognized in earnings as they occur. Certain securities are held as an economic hedge of the mortgage servicing rights. 

The fair value and net unrealized gain (loss) included in fair value option securities is as follows (in thousands):

	September 30, 2023		December 31, 2022
	Fair Value	Net Unrealized Gain (Loss)	Fair Value	Net Unrealized Gain (Loss)
Residential agency mortgage-backed securities	20,215	(2,436)	296,590	338

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Derivatives

9 Months Ended

Sep. 30, 2023

Derivative Instrument Detail [Abstract]

Derivatives [Text Block]

Derivatives

Derivative instruments may be used by the Company as part of its internal risk management programs or may be offered to customers. All derivative instruments are carried at fair value, and changes in fair value are reported in earnings as they occur. Credit risk is also considered in determining fair value. Deterioration in the credit rating of customer or other counterparties reduce the fair value of asset contracts. Deterioration of our credit rating could decrease the fair value of our derivative liabilities.

When bilateral netting agreements or similar arrangements exist between the Company and its counterparties that create a single legal claim or obligation to pay or receive the net amount in settlement of the individual derivative contracts, the Company reports derivative assets and liabilities on a net by derivative contract type by counterparty basis.

Derivative contracts may require the Company to provide or receive cash margin as collateral for derivative assets and liabilities. Derivative assets and liabilities are reported net of cash margin when certain conditions are met. In addition, derivative contracts executed with customers under Customer Risk Management Programs may be secured by non-cash collateral in conjunction with a credit agreement with that customer. Access to collateral in the event of default is reasonably assured.

None of these derivative contracts have been designated as hedging instruments for accounting purposes.

Customer Risk Management Programs

BOK Financial offers programs to permit its customers to manage various risks, including fluctuations in energy, cattle and other agricultural products, interest rates and foreign exchange rates with derivative contracts. Customers may also manage interest rate risk through interest rate swaps used by borrowers to modify interest rate terms of their loans. Derivative contracts are executed between the customers and BOK Financial. Offsetting contracts are executed between BOK Financial and other selected counterparties to minimize the risk of changes in commodity prices, interest rates or foreign exchange rates. The counterparty contracts are identical to customer contracts, except for a fixed pricing spread or fee paid to BOK Financial as profit and compensation for administrative costs and credit risk which is recognized over the life of the contracts and included in Other operating revenue – Brokerage and trading revenue in the Consolidated Statements of Earnings.

Trading

BOK Financial may offer derivative instruments such as to-be-announced securities to mortgage banking customers to enable them to manage their market risk or to mitigate the Company's market risk of holding trading securities. Changes in the fair value of derivative instruments for trading purposes or used to mitigate the market risk of holding trading securities are included in Other operating revenue – Brokerage and trading revenue.

Internal Risk Management Programs

BOK Financial may use derivative contracts in managing its interest rate sensitivity, as part of its economic hedge of the change in the fair value of mortgage servicing rights. Changes in the fair value of derivative instruments used in managing interest rate sensitivity and as part of the economic hedge of changes in the fair value of mortgage servicing rights are included in Other operating revenue – Gain (loss) on derivatives, net in the Consolidated Statements of Earnings.

As discussed in Note 5, certain derivative contracts not designated as hedging instruments related to mortgage loan commitments and forward sales contracts are included in Residential mortgage loans held for sale on the Consolidated Balance Sheets. See Note 5 for additional discussion of notional, fair value and impact on earnings of these contracts.

The following table summarizes the fair values of derivative contracts recorded as "derivative contracts" assets and liabilities in the balance sheet at September 30, 2023 (in thousands):

	Assets
	Notional1		Gross Fair Value		Netting Adjustments		Net Fair Value Before Cash Collateral		Cash Collateral		Fair Value Net of Cash Collateral
Customer risk management programs:
Interest rate contracts	$	2,763,185	$	160,856	$	—	$	160,856	$	(160,548)	$	308
Energy contracts	8,617,592		972,109		(607,483)		364,626		(34,399)		330,227
Foreign exchange contracts	70,676		68,262		—		68,262		(2,086)		66,176
Equity option contracts	5,524		47		—		47		(47)		—
Total customer risk management programs	11,456,977		1,201,274		(607,483)		593,791		(197,080)		396,711
Trading	24,569,954		234,809		(85,411)		149,398		—		149,398
Internal risk management programs	—		—		—		—		—		—
Total derivative contracts	$	36,026,931	$	1,436,083	$	(692,894)	$	743,189	$	(197,080)	$	546,109
	Liabilities
	Notional1		Gross Fair Value		Netting Adjustments		Net Fair Value Before Cash Collateral		Cash Collateral		Fair Value Net of Cash Collateral
Customer risk management programs:
Interest rate contracts	$	2,763,185	$	160,869	$	—	$	160,869	$	—	$	160,869
Energy contracts	8,941,634		966,583		(607,483)		359,100		(242,133)		116,967
Foreign exchange contracts	64,921		62,306		—		62,306		—		62,306
Equity option contracts	5,524		47		—		47		—		47
Total customer risk management programs	11,775,264		1,189,805		(607,483)		582,322		(242,133)		340,189
Trading	18,778,554		150,983		(85,412)		65,571		(6,138)		59,433
Internal risk management programs	295,000		4,325		—		4,325		—		4,325
Total derivative contracts	$	30,848,818	$	1,345,113	$	(692,895)	$	652,218	$	(248,271)	$	403,947

1    Notional amounts for commodity contracts are converted into dollar-equivalent amounts based on dollar prices at the inception of the contract.

The following table summarizes the fair values of derivative contracts recorded as "derivative contracts" assets and liabilities in the balance sheet at December 31, 2022 (in thousands):

	Assets
	Notional 1		Gross Fair Value		Netting Adjustments		Net Fair Value Before Cash Collateral		Cash Collateral		Fair Value Net of Cash Collateral
Customer risk management programs:
Interest rate contracts	$	2,629,318	$	158,825	$	—	$	158,825	$	(114,955)	$	43,870
Energy contracts	7,918,020		1,232,283		(594,543)		637,740		(67,024)		570,716
Foreign exchange contracts	219,791		216,569		—		216,569		—		216,569
Equity option contracts	21,102		193		—		193		(109)		84
Total customer risk management programs	10,788,231		1,607,870		(594,543)		1,013,327		(182,088)		831,239
Trading	17,400,037		126,910		(74,647)		52,263		(4,646)		47,617
Internal risk management programs	85,000		1,500		(13)		1,487		—		1,487
Total derivative contracts	$	28,273,268	$	1,736,280	$	(669,203)	$	1,067,077	$	(186,734)	$	880,343
	Liabilities
	Notional 1		Gross Fair Value		Netting Adjustments		Net Fair Value Before Cash Collateral		Cash Collateral		Fair Value Net of Cash Collateral
Customer risk management programs:
Interest rate contracts	$	2,629,122	$	158,816	$	—	$	158,816	$	—	$	158,816
Energy contracts	8,696,060		1,242,058		(594,543)		647,515		(484,319)		163,196
Foreign exchange contracts	214,855		211,233		—		211,233		(7)		211,226
Equity option contracts	21,102		193		—		193		—		193
Total customer risk management programs	11,561,139		1,612,300		(594,543)		1,017,757		(484,326)		533,431
Trading	14,038,906		94,958		(74,647)		20,311		(423)		19,888
Internal risk management programs	178,806		1,594		(13)		1,581		—		1,581
Total derivative contracts	$	25,778,851	$	1,708,852	$	(669,203)	$	1,039,649	$	(484,749)	$	554,900

1    Notional amounts for commodity contracts are converted into dollar-equivalent amounts based on dollar prices at the inception of the contract.

The following summarizes the pre-tax net gains (losses) on derivative instruments and where they are recorded in the income statement (in thousands):

	Three Months Ended
	September 30, 2023				September 30, 2022
	Brokerage and Trading Revenue		Gain (Loss) on Derivatives, Net		Brokerage and Trading Revenue		Gain (Loss) on Derivatives, Net
Customer risk management programs:
Interest rate contracts	$	800	$	—	$	2,677	$	—
Energy contracts	5,994		—		10,386		—
Foreign exchange contracts	61		—		116		—
Equity option contracts	—		—		—		—
Total customer risk management programs	6,855		—		13,179		—
Trading1	21,511		—		52,373		—
Internal risk management programs	—		(9,010)		—		(17,009)
Total derivative contracts	$	28,366	$	(9,010)	$	65,552	$	(17,009)

1    Represents changes in fair value of to-be-announced securities and other derivative instruments held to mitigate market risk of trading securities portfolio, which is offset by changes in fair value of trading securities also included in Brokerage and Trading Revenue in the Consolidated Statements of Earnings.

	Nine Months Ended
	September 30, 2023				September 30, 2022
	Brokerage and Trading Revenue		Gain (Loss) on Derivatives, Net		Brokerage and Trading Revenue		Gain (Loss) on Derivatives, Net
Customer risk management programs:
Interest rate contracts	4,909		—		9,958		—
Energy contracts	23,797		—		26,870		—
Foreign exchange contracts	145		—		422		—
Equity option contracts	—		—		—		—
Total customer risk management programs	28,851		—		37,250		—
Trading1	22,590		—		68,071		—
Internal risk management programs	—		(18,513)		—		(77,559)
Total derivative contracts	$	51,441	$	(18,513)	$	105,321	$	(77,559)

1    Represents changes in fair value of to-be-announced securities and other derivative instruments held to mitigate market risk of trading securities portfolio, which is offset by changes in fair value of trading securities also included in Brokerage and Trading Revenue in the Consolidated Statements of Earnings.

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Loans and Allowances for Credit Losses

9 Months Ended

Sep. 30, 2023

Loans and Leases Receivable, Net Amount [Abstract]

Loans [Text Block]

Loans

Loans are either secured or unsecured based on the type of loan and the financial condition of the borrower. Repayment is generally expected from cash flow or proceeds from the sale of selected assets of the borrower. BOK Financial is exposed to risk of loss on loans due to the borrower's difficulties, which may arise from any number of factors, including problems within the respective industry or local economic conditions. Access to collateral, in the event of borrower default, is reasonably assured through adherence to applicable lending laws and through sound lending standards and credit review procedures. Accounting policies for all loans, excluding residential mortgage loans guaranteed by U.S. government agencies, are as follows.

Interest is accrued at the applicable interest rate on the principal amount outstanding. Loans are placed on nonaccruing status when, in the opinion of management, full collection of principal or interest is uncertain. Internally risk graded loans are individually evaluated for nonaccruing status quarterly. Non-risk graded loans are generally placed on nonaccruing status when more than 90 days past due or within 60 days of being notified of the borrower's bankruptcy filing. Interest previously accrued but not collected is charged against interest income when the loan is placed on nonaccruing status. Accrued but not paid interest receivable is included in Receivables in the Consolidated Balance Sheets. Payments on nonaccruing loans are applied to principal or recognized as interest income, according to management's judgment as to the collectability of principal. Loans may be returned to accruing status when, in the opinion of management, full collection of principal and interest, including principal previously charged off, is probable based on improvements in the borrower's financial condition or a sustained period of performance.

For loans acquired with no evidence of credit deterioration, discounts are accreted on either an individual basis for loans with unique characteristics or on a pool basis for groups of homogeneous loans. Accretion is discontinued when a loan with an individually attributed discount is placed on nonaccruing status.

Modifications of loans to existing borrowers generally consist of interest rate reductions, extension of payment terms, or a combination of these. Modifications may arise either voluntarily through negotiations with the borrower or involuntarily through court order. Payment deferrals up to six months are generally considered to be short-term modifications. Generally, principal and accrued but unpaid interest is not voluntarily forgiven. A change to the allowance for credit losses is generally not recorded upon modification because the effect of most modifications made to borrowers experiencing financial difficulty is already included in the allowance methodology.

Performing loans may be renewed under the current collateral value, debt service ratio and other underwriting standards. Nonaccruing loans may be renewed and will remain classified as nonaccruing. 

Occasionally, loans, other than residential mortgage loans, may be held for sale in order to manage credit concentration. These loans are carried at the lower of cost or fair value with gains or losses recognized in Other gains (losses), net in the Consolidated Statements of Earnings.

All loans are charged off when the loan balance or a portion of the loan balance is no longer supported by the paying capacity of the borrower or when the required cash flow is reduced in a modification. The charge-off amount is determined through a quarterly evaluation of available cash resources and collateral values. Internally risk graded loans are evaluated quarterly, and charge-offs are taken in the quarter in which the loss is identified. Non-risk graded loans that are past due between 60 days and 180 days, based on the loan product type, are charged off. Loans to borrowers whose personal obligation has been discharged through Chapter 7 bankruptcy proceedings are charged off within 60 days of notice of the bankruptcy filing, regardless of payment status.

Loan origination and commitment fees and direct loan acquisition and origination costs are deferred and amortized as an adjustment to yield over the life of the loan or over the commitment period, as applicable. Amortization does not anticipate loan prepayments. Net unamortized fees are recognized in full at time of payoff.

Qualifying residential mortgage loans guaranteed by U.S. government agencies have been sold into GNMA pools. Under certain performance conditions specified in government programs, the Company may have the right, but not the obligation to repurchase loans from GNMA pools. These loans no longer qualify for sale accounting and are recognized in the Consolidated Balance Sheets. We do not expect to receive all principal and interest based on the loan's contractual terms. A portion of the principal balance continues to be guaranteed; however, interest accrues at a curtailed rate as specified in the programs. The carrying value of these loans is reduced based on an estimate of the expected cash flows discounted at the original note rate plus a liquidity spread. Guaranteed loans may be modified in accordance with U.S. government agency guidelines. Interest continues to accrue based on the modified rate. Guaranteed loans may either be resold into GNMA pools after a performance period specified by the programs or foreclosed and conveyed to the guarantors.

Loans are disaggregated into portfolio segments and further disaggregated into classes. The portfolio segment is the level at which the Company develops and documents a systematic method for determining its allowance for credit losses. Classes are a further disaggregation of portfolio segments based on the risk characteristics of the loans and the Company's method for monitoring and assessing credit risk. 

Portfolio segments of the loan portfolio are as follows (in thousands):

	September 30, 2023								December 31, 2022
	Fixed Rate		Variable Rate		Non-accrual		Total		Fixed Rate		Variable Rate		Non-accrual		Total
Commercial	$	3,536,353	$	11,112,788	$	70,698	$	14,719,839	$	3,392,422	$	10,759,780	$	60,297	$	14,212,499
Commercial real estate	848,042		4,385,840		7,418		5,241,300		874,716		3,715,491		16,570		4,606,777
Loans to individuals	2,229,750		1,491,660		41,469		3,762,879		2,099,165		1,593,779		44,930		3,737,874
Total	$	6,614,145	$	16,990,288	$	119,585	$	23,724,018	$	6,366,303	$	16,069,050	$	121,797	$	22,557,150

Credit Commitments

Commitments to extend credit are agreements to lend to a customer as long as there is no violation of conditions established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. At September 30, 2023, outstanding commitments totaled $14.4 billion. Because some commitments are expected to expire before being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. BOK Financial uses the same credit policies in making commitments as it does loans.

The amount of collateral obtained, if deemed necessary, is based upon management's credit evaluation of the borrower.

Standby letters of credit are conditional commitments issued to guarantee the performance of a customer to a third party. Because the credit risk involved in issuing standby letters of credit is essentially the same as that involved in extending loan commitments, BOK Financial uses the same credit policies in evaluating the creditworthiness of the customer. Additionally, BOK Financial uses the same evaluation process in obtaining collateral on standby letters of credit as it does for loan commitments. The term of these standby letters of credit is defined in each commitment and typically corresponds with the underlying loan commitment. At September 30, 2023, outstanding standby letters of credit totaled $760 million. 

Allowances for Credit Losses and Accrual for Off-balance Sheet Credit Risk from Unfunded Loans Commitments

The allowance for loan losses and accrual for off-balance sheet credit risk from unfunded loan commitments represent the portion of the amortized cost basis of loans that we do not expect to collect over the asset's contractual life, considering past events, current conditions, and reasonable and supportable forecasts of future economic conditions. The appropriateness of the allowance for credit losses, including industry and product adjustments, is assessed quarterly by a senior management Allowance Committee. This review is based on an ongoing evaluation of the estimated expected credit losses in the portfolio and on unused commitments to provide financing. A well-documented methodology has been developed and is applied by an independent Credit Administration department to assure consistency across the Company.

The allowance for loan losses consists of specific allowances attributed to certain individual loans, generally nonaccruing loans, with dissimilar risk characteristics that have not yet been charged down to amounts we expect to recover and general allowances for estimated credit losses on pools of loans that share similar risk characteristics.

When full collection of principal or interest is uncertain, the loan's risk characteristics have changed, and we exclude the loan from the general allowance pool, typically designating it as nonaccruing. For these loans, a specific allowance reflects the expected credit loss.

We measure specific allowances for loans excluded from the general allowance pool by an evaluation of estimated future cash flows discounted at the loan's initial effective interest rate or the fair value of collateral for certain collateral dependent loans. For a non-collateral dependent loan, the specific allowance is the amount by which the loan's amortized cost basis exceeds its net realizable value. We measure the specific allowance for collateral dependent loans as the amount by which the loan's amortized cost basis exceeds its fair value. When repayment is expected to be provided substantially through the sale of collateral, we deduct estimated selling costs from the collateral's fair value. Generally, for real property held as collateral for loans, third-party appraisals that conform to Uniform Standards of Professional Appraisal Practice serve as the basis for the fair value of real property held as collateral. These appraised values are on an "as-is" basis and generally are not adjusted by the Company. We obtain updated appraisals at least annually or more frequently if market conditions indicate collateral values may have declined. For energy loans, our internal staff of engineers generally determines collateral value of mineral rights based on projected cash flows from proven oil and gas reserves under existing economic and operating conditions. For real property held as collateral for other loans, third-party appraisals that conform to Uniform Standards of Professional Appraisal Practice generally serve as the basis for the fair value. These appraised values are on an "as-is" basis and generally are not adjusted by the Company. We obtain updated appraisals at least annually or more frequently if market conditions indicate collateral values may have declined. Our special assets staff generally determines the value of other collateral based on projected liquidation cash flows under current market conditions. We evaluate collateral values and available cash resources quarterly. Historical statistics may be used to estimate specific allowances in limited situations, such as when a collateral dependent loan is removed from the general allowance pool near the end of a reporting period until an appraisal of collateral value is received or a full assessment of future cash flows is completed.

General allowances estimate expected credit losses on pools of loans sharing similar risk characteristics that are expected to occur over the loan's estimated remaining life. The loan's estimated remaining life represents the contractual term adjusted for amortization, estimates of prepayments, and borrower-owned extension options. Approximately 90 percent of the committed dollars in the loan portfolio is risk graded loans with general allowance model inputs that include probability of default, loss given default, and exposure at default. Probability of default is based on the migration of loans from performing to nonperforming using historical life of loan analysis periods. Loss given default is based on the aggregate losses incurred, net of estimated recoveries. Exposure at default represents an estimate of the outstanding amount of credit exposure at the time a default may occur.

Charge-off migration is used to calculate the general allowance for the majority of non-risk graded loans to individuals. The expected credit loss on less than 10 percent of the committed dollars in the portfolio is calculated using charge-off migration.

The expected credit loss on approximately 1 percent of the committed dollars in the portfolio is calculated using a non-modeled approach. Specifically, the calculation applies a long-term net charge-off rate to the loan balances, adjusted for the weighted average remaining maturity of each portfolio.

In estimating the expected credit losses for general allowances on performing risk-graded loans, each portfolio class is assigned relevant economic loss drivers which best explain variations in portfolio net loss rates. The probability of default estimates for each portfolio class are adjusted for current and forecasted economic conditions. The result is applied to the exposure at default and loss given default to calculate the lifetime expected credit loss estimate. Selection of relevant economic loss drivers is re-evaluated periodically and involves statistical analysis as well as management judgment. The unemployment rate factors significantly in the allowance for loan losses calculation, affecting commercial and loans to individuals segments. Other primary factors impacting the commercial portfolio include BBB corporate spreads, real gross domestic product growth rate, and energy commodity prices. The primary commercial real estate variables are vacancy rate and BBB corporate spreads. In addition to the unemployment rate, the forecast for loans to individuals is tied to a home price index. The forecasts may include regional economic factors when localized conditions diverge from national conditions.

An Economic Forecast Committee, consisting of senior management with members largely independent of the allowance process develops a twelve-month forward-looking forecast for the relevant economic loss drivers. Management develops these forecasts based on external data as well as a view of future economic conditions which may include adjustments for regional conditions. The forecast includes three economic scenarios and probability weights for each scenario. The base forecast represents management's view of the most likely outcome, while the downside forecast reflects reasonably possible worsening economic conditions, and the upside forecast projects reasonably possible improving conditions.

At the end of the one-year reasonable and supportable forecast period, we transition from shorter-term expected losses to long-term loss averages for the loan's estimated remaining life. The difference between short-term loss forecasts and long-term loss averages is run-off over the reversion horizon, up to three years, depending on the forecasted economic scenarios.

General allowances also consider the estimated impact of factors that are not captured in the modeled results or historical experience. These factors may increase or decrease modeled results by amounts determined by the Allowance Committee. Factors not captured in modeled results or historical experience may include for example, new lines of business, market conditions that have not been previously encountered, observed changes in credit risk that are not yet reflected in macro-economic factors, or economic conditions that impact loss given default assumptions.

The accrual for off-balance sheet credit risk is maintained at a level that is appropriate to cover estimated losses associated with credit instruments that are not currently recognized as assets such as loan commitments, standby letters of credit or guarantees that are not unconditionally cancelable by the bank. This accrual is included in other liabilities in the Consolidated Balance Sheets. The appropriateness of the accrual is determined in the same manner as the allowance for loan losses, with the added consideration of commitment usage over the remaining life for those loans that the bank can not unconditionally cancel.

A provision for credit losses is charged against or credited to earnings in amounts necessary to maintain an appropriate Allowance for Credit Losses. Recoveries of loans previously charged off are added to the allowance when received.

The activity in the allowance for loan losses and the allowance for off-balance sheet credit losses related to loan commitments and standby letters of credit is summarized as follows (in thousands):

	Three Months Ended
	September 30, 2023
	Commercial		Commercial Real Estate		Loans to Individuals		Total
Allowance for loan losses:
Beginning balance	$	143,269	$	76,347	$	43,098	$	262,714
Provision for loan losses	1,158		11,152		3,621		15,931
Loans charged off	(6,769)		(2,238)		(1,586)		(10,593)
Recoveries of loans previously charged off	273		3,167		622		4,062
Ending balance	$	137,931	$	88,428	$	45,755	$	272,114
Allowance for off-balance sheet credit risk from unfunded loan commitments:
Beginning balance	$	20,294	$	37,681	$	1,965	$	59,940
Provision for off-balance sheet credit risk	(2,179)		(5,076)		(81)		(7,336)
Ending balance	$	18,115	$	32,605	$	1,884	$	52,604

	Nine Months Ended
	September 30, 2023
	Commercial		Commercial Real Estate		Loans to Individuals		Total
Allowance for loan losses:
Beginning balance	$	131,586	$	57,648	$	46,470	$	235,704
Provision for loan losses	12,908		35,878		1,627		50,413
Loans charged off	(9,578)		(8,446)		(4,285)		(22,309)
Recoveries of loans previously charged off	3,015		3,348		1,943		8,306
Ending balance	$	137,931	$	88,428	$	45,755	$	272,114
Allowance for off-balance sheet credit risk from unfunded loan commitments:
Beginning balance	$	18,246	$	40,490	$	2,183	$	60,919
Provision for off-balance sheet credit risk	(131)		(7,885)		(299)		(8,315)
Ending balance	$	18,115	$	32,605	$	1,884	$	52,604

	Three Months Ended
	September 30, 2022
	Commercial		Commercial Real Estate		Loans to Individuals		Total
Allowance for loan losses:
Beginning balance	$	137,562	$	62,997	$	40,555	$	241,114
Provision for loan losses	3,158		(4,415)		2,368		1,111
Loans charged off	(75)		—		(1,691)		(1,766)
Recoveries of loans previously charged off	721		7		581		1,309
Ending balance	$	141,366	$	58,589	$	41,813	$	241,768
Allowance for off-balance sheet credit risk from unfunded loan commitments:
Beginning balance	$	15,839	$	24,670	$	1,741	$	42,250
Provision for off-balance sheet credit risk	939		12,826		295		14,060
Ending balance	$	16,778	$	37,496	$	2,036	$	56,310

	Nine Months Ended
	September 30, 2022
	Commercial		Commercial Real Estate		Loans to Individuals		Total
Allowance for loan losses:
Beginning balance	$	162,056	$	58,553	$	35,812	$	256,421
Provision for loan losses	(17,428)		138		8,276		(9,014)
Loans charged off	(6,162)		(269)		(4,508)		(10,939)
Recoveries of loans previously charged off	2,900		167		2,233		5,300
Ending balance	$	141,366	$	58,589	$	41,813	$	241,768
Allowance for off-balance sheet credit risk from unfunded loan commitments:
Beginning balance	$	13,812	$	17,442	$	1,723	$	32,977
Provision for off-balance sheet credit risk	2,966		20,054		313		23,333
Ending balance	$	16,778	$	37,496	$	2,036	$	56,310

A $7.0 million provision for credit losses was necessary for the third quarter of 2023, reflecting modest improvement in the economic outlook and the impact of forecasted higher energy prices during the forecast period, offset by loan growth and the impact of a more challenging national commercial real estate environment, particularly related to office.

The allowance for loan losses and recorded investment of the related loans by portfolio segment for each measurement method at September 30, 2023 is as follows (in thousands):

	Collectively Measured for General Allowances				Individually Measured for Specific Allowances				Total
	Recorded Investment		Related Allowance		Recorded Investment		Related Allowance		Recorded Investment		Related Allowance
Commercial	$	14,649,141	$	136,285	$	70,698	$	1,646	$	14,719,839	$	137,931
Commercial real estate	5,233,882		88,428		7,418		—		5,241,300		88,428
Loans to individuals	3,721,410		45,755		41,469		—		3,762,879		45,755
Total	$	23,604,433	$	270,468	$	119,585	$	1,646	$	23,724,018	$	272,114

The allowance for loan losses and recorded investment of the related loans by portfolio segment for each measurement method at December 31, 2022 is as follows (in thousands):

	Collectively Measured for General Allowances				Individually Measured for Specific Allowances				Total
	Recorded Investment		Related Allowance		Recorded Investment		Related Allowance		Recorded Investment		Related Allowance
Commercial	$	14,152,202	$	127,566	$	60,297	$	4,020	$	14,212,499	$	131,586
Commercial real estate	4,590,207		56,098		16,570		1,550		4,606,777		57,648
Loans to individuals	3,692,944		46,470		44,930		—		3,737,874		46,470
Total	$	22,435,353	$	230,134	$	121,797	$	5,570	$	22,557,150	$	235,704

Credit Quality Indicators

The Company utilizes risk grading as primary credit quality indicators as it influences the probability of default which is a key attribute in the expected credit losses calculation. Substantially all commercial as well as commercial real estate loans and certain loans to individuals are risk graded based on a quarterly evaluation of the borrowers' ability to repay the loans. Certain commercial loans and most loans to individuals are small, homogeneous pools that are not risk-graded. The credit quality of these loans is based on past due days in accordance with regulatory guidelines.

We have included in the credit quality indicator "pass" loans that are in compliance with the original terms of the agreement and currently exhibit no factors that cause management to have doubts about the borrowers' ability to remain in compliance with the original terms of the agreement, which is consistent with the regulatory guideline of "pass". This also includes past due residential mortgages that are guaranteed by agencies of the U.S. government that continue to accrue interest based on criteria of the guarantors' programs.

Other loans especially mentioned ("Special Mention") are currently performing in compliance with the original terms of the agreement but may have a potential weakness that deserves management's close attention, consistent with regulatory guidelines. Non-graded loans 30 to 59 days past due are categorized as Special Mention.

The risk grading process identifies certain loans that have a well-defined weakness (for example, inadequate debt service coverage or liquidity or marginal capitalization; repayment may depend on collateral or other risk mitigation) that may jeopardize liquidation of the debt and represent a greater risk due to deterioration in the financial condition of the borrower. This is consistent with the regulatory guideline for "substandard". Because the borrowers are still performing in accordance with the original terms of the loan agreements, these loans remain on accruing status. Non-graded loans 60 to 89 days past due are categorized as Accruing Substandard.

Nonaccruing loans represent loans for which full collection of principal and interest is uncertain. This includes certain loans considered "substandard" and all loans considered "doubtful" by regulatory guidelines. Non-graded loans 90 or more days past due are categorized as Nonaccrual.

Probability of default is lowest for pass graded loans and increases for each credit quality indicator, Special Mention, and Accruing Substandard.

Vintage represents the year of origination, except for revolving loans which are considered in aggregate. Loans that were once revolving but have converted to term loans without additional underwriting appear in a separate vintage column.

The following table summarizes the Company’s loan portfolio at September 30, 2023 by the risk grade categories and vintage (in thousands): 

	Origination Year
	2023		2022		2021		2020		2019		Prior		Revolving Loans		Revolving Loans Converted to Term Loans		Total
Commercial:
Energy
Pass	$	192,614	$	106,593	$	45,795	$	8,190	$	10,463	$	12,518	$	3,064,120	$	—	$	3,440,293
Special Mention	—		—		—		—		—		—		13,950		—		13,950
Accruing Substandard	—		—		—		—		—		—		16,800		—		16,800
Nonaccrual	—		—		—		—		—		108		19,451		—		19,559
Total energy	192,614		106,593		45,795		8,190		10,463		12,626		3,114,321		—		3,490,602
Loans charged-off, year-to-date	—		—		—		—		—		—		—		—		—
Healthcare
Pass	485,617		903,150		573,317		464,170		338,944		947,581		268,806		16		3,981,601
Special Mention	—		—		18,719		—		2,421		18,072		980		—		40,192
Accruing Substandard	—		589		214		6,957		—		10,046		1,700		—		19,506
Nonaccrual	—		—		—		—		25,797		10,525		5,513		—		41,835
Total healthcare	485,617		903,739		592,250		471,127		367,162		986,224		276,999		16		4,083,134
Loans charged-off, year-to-date	—		—		—		—		—		—		—		—		—
Services
Pass	707,494		541,539		412,450		247,092		131,269		723,365		759,327		870		3,523,406
Special Mention	—		13,051		1,836		1,531		596		2,733		1,421		—		21,168
Accruing Substandard	—		5,752		730		1,716		2,333		3,446		4,957		33		18,967
Nonaccrual	—		—		2,161		337		—		—		322		—		2,820
Total services	707,494		560,342		417,177		250,676		134,198		729,544		766,027		903		3,566,361
Loans charged-off, year-to-date	—		—		3,360		—		—		—		1,577		—		4,937
General business
Pass	667,802		504,364		262,660		148,645		140,220		319,113		1,396,919		2,196		3,441,919
Special Mention	9,277		15,059		9,103		1,115		287		8,389		7,959		—		51,189
Accruing Substandard	3,956		37,025		1,440		37		—		—		37,693		—		80,151
Nonaccrual	—		—		—		—		—		54		6,385		44		6,483
Total general business	681,035		556,448		273,203		149,797		140,507		327,556		1,448,956		2,240		3,579,742
Loans charged-off, year-to-date	—		—		4,598		2		—		17		14		10		4,641
Total commercial	2,066,760		2,127,122		1,328,425		879,790		652,330		2,055,950		5,606,303		3,159		14,719,839
Commercial real estate:
Pass	361,934		1,730,828		1,211,694		480,710		555,902		723,783		139,721		—		5,204,572
Special Mention	—		—		—		—		—		19,212		—		—		19,212
Accruing Substandard	—		—		79		—		—		10,019		—		—		10,098
Nonaccrual	—		—		—		—		7,263		155		—		—		7,418
Total commercial real estate	361,934		1,730,828		1,211,773		480,710		563,165		753,169		139,721		—		5,241,300
Loans charged-off, year-to-date	—		—		—		—		—		8,446		—		—		8,446

	Origination Year
	2023		2022		2021		2020		2019		Prior		Revolving Loans		Revolving Loans Converted to Term Loans		Total
Loans to individuals:
Residential mortgage
Pass	320,680		332,368		348,782		354,284		57,944		252,027		366,136		22,277		2,054,498
Special Mention	—		359		262		1,339		—		152		3,144		88		5,344
Accruing Substandard	—		—		—		—		—		45		101		51		197
Nonaccrual	—		1,298		2,223		2,771		723		20,728		2,196		1,014		30,953
Total residential mortgage	320,680		334,025		351,267		358,394		58,667		272,952		371,577		23,430		2,090,992
Loans charged-off, year-to-date	—		—		51		4		—		14		1		—		70
Residential mortgage guaranteed by U.S. government agencies
Pass	—		1,624		2,030		4,749		6,752		135,502		—		—		150,657
Nonaccrual	—		—		—		280		376		9,779		—		—		10,435
Total residential mortgage guaranteed by U.S. government agencies	—		1,624		2,030		5,029		7,128		145,281		—		—		161,092
Personal:
Pass	161,514		227,726		167,566		137,761		133,304		158,721		523,513		195		1,510,300
Special Mention	100		30		103		22		2		—		—		—		257
Accruing Substandard	—		—		—		2		157		—		—		—		159
Nonaccrual	—		27		4		9		4		12		23		—		79
Total personal	161,614		227,783		167,673		137,794		133,467		158,733		523,536		195		1,510,795
Loans charged-off, year-to-date	—		60		40		41		—		4,042		26		6		4,215
Total loans to individuals	482,294		563,432		520,970		501,217		199,262		576,966		895,113		23,625		3,762,879
Total loans	$	2,910,988	$	4,421,382	$	3,061,168	$	1,861,717	$	1,414,757	$	3,386,085	$	6,641,137	$	26,784	$	23,724,018

The following table summarizes the Company's loan portfolio at December 31, 2022 by the risk grade categories and vintage (in thousands): 

	Origination Year
	2022		2021		2020		2019		2018		Prior		Revolving Loans		Revolving Loans Converted to Term Loans		Total
Commercial:
Energy
Pass	$	157,745	$	76,951	$	30,284	$	12,783	$	5,992	$	4,980	$	3,104,906	$	—	$	3,393,641
Accruing Substandard	—		—		—		664		385		683		28,018		—		29,750
Nonaccrual	—		—		—		—		—		159		1,240		—		1,399
Total energy	157,745		76,951		30,284		13,447		6,377		5,822		3,134,164		—		3,424,790
Healthcare
Pass	932,097		604,886		476,854		404,204		464,989		618,163		245,898		20		3,747,111
Special Mention	—		—		—		20,071		—		18,859		4		—		38,934
Accruing Substandard	—		—		—		—		—		14,304		3,634		—		17,938
Nonaccrual	—		—		—		26,480		6,373		8,181		—		—		41,034
Total healthcare	932,097		604,886		476,854		450,755		471,362		659,507		249,536		20		3,845,017
Services
Pass	821,785		496,510		286,085		193,481		156,736		696,300		722,371		639		3,373,907
Special Mention	502		5,139		989		771		894		1,345		8,668		—		18,308
Accruing Substandard	—		—		—		2,459		43		2,789		17,665		122		23,078
Nonaccrual	—		5,570		449		—		—		2,389		7,820		—		16,228
Total services	822,287		507,219		287,523		196,711		157,673		702,823		756,524		761		3,431,521
General business
Pass	725,894		361,839		198,274		172,878		139,140		283,694		1,570,536		2,329		3,454,584
Special Mention	17,759		13,065		208		71		7		2,291		7,094		26		40,521
Accruing Substandard	—		2,169		66		4,130		4,680		3,287		94		4		14,430
Nonaccrual	—		—		1,052		14		72		5		485		8		1,636
Total general business	743,653		377,073		199,600		177,093		143,899		289,277		1,578,209		2,367		3,511,171
Total commercial	2,655,782		1,566,129		994,261		838,006		779,311		1,657,429		5,718,433		3,148		14,212,499
Commercial real estate:
Pass	1,188,483		1,158,002		552,616		641,102		247,625		633,304		161,616		—		4,582,748
Accruing Substandard	—		—		—		7,459		—		—		—		—		7,459
Nonaccrual	—		—		—		—		—		16,570		—		—		16,570
Total commercial real estate	1,188,483		1,158,002		552,616		648,561		247,625		649,874		161,616		—		4,606,777

	Origination Year
	2022		2021		2020		2019		2018		Prior		Revolving Loans		Revolving Loans Converted to Term Loans		Total
Loans to individuals:
Residential mortgage
Pass	354,497		373,190		393,002		63,142		40,525		260,625		352,126		22,176		1,859,283
Special Mention	—		81		42		—		142		388		527		87		1,267
Accruing Substandard	—		—		187		—		—		138		117		1		443
Nonaccrual	32		1,656		2,717		362		1,904		20,139		2,216		765		29,791
Total residential mortgage	354,529		374,927		395,948		63,504		42,571		281,290		354,986		23,029		1,890,784
Residential mortgage guaranteed by U.S. government agencies
Pass	289		2,254		9,000		10,722		17,244		191,426		—		—		230,935
Nonaccrual	—		—		299		1,460		2,319		10,927		—		—		15,005
Total residential mortgage guaranteed by U.S. government agencies	289		2,254		9,299		12,182		19,563		202,353		—		—		245,940
Personal:
Pass	254,497		193,095		154,887		172,114		68,871		201,278		549,187		332		1,594,261
Special Mention	47		28		40		12		17		—		6,003		4		6,151
Accruing Substandard	—		444		—		160		—		—		—		—		604
Nonaccrual	38		7		12		22		14		18		23		—		134
Total personal	254,582		193,574		154,939		172,308		68,902		201,296		555,213		336		1,601,150
Total loans to individuals	609,400		570,755		560,186		247,994		131,036		684,939		910,199		23,365		3,737,874
Total loans	$	4,453,665	$	3,294,886	$	2,107,063	$	1,734,561	$	1,157,972	$	2,992,242	$	6,790,248	$	26,513	$	22,557,150

Nonaccruing Loans

A summary of nonaccruing loans at September 30, 2023 follows (in thousands): 

	As of September 30, 2023
	Total		With No Allowance		With Allowance		Related Allowance
Commercial:
Energy	$	19,559	$	19,559	$	—	$	—
Healthcare	41,836		41,836		—		—
Services	2,820		337		2,483		1,646
General business	6,483		6,483		—		—
Total commercial	70,698		68,215		2,483		1,646
Commercial real estate	7,418		7,418		—		—
Loans to individuals:
Residential mortgage	30,954		30,954		—		—
Residential mortgage guaranteed by U.S. government agencies	10,436		10,436		—		—
Personal	79		79		—		—
Total loans to individuals	41,469		41,469		—		—
Total	$	119,585	$	117,102	$	2,483	$	1,646

A summary of nonaccruing loans at December 31, 2022 follows (in thousands): 

	As of December 31, 2022
	Total		With No Allowance		With Allowance		Related Allowance
Commercial:
Energy	$	1,399	$	1,399	$	—	$	—
Healthcare	41,034		34,661		6,373		946
Services	16,228		7,835		8,393		3,074
General business	1,636		1,636		—		—
Total commercial	60,297		45,531		14,766		4,020
Commercial real estate	16,570		393		16,177		1,550
Loans to individuals:
Residential mortgage	29,791		29,791		—		—
Residential mortgage guaranteed by U.S. government agencies	15,005		15,005		—		—
Personal	134		134		—		—
Total loans to individuals	44,930		44,930		—		—
Total	$	121,797	$	90,854	$	30,943	$	5,570

Loan Modifications to Borrowers Experiencing Financial Difficulty

At September 30, 2023 the Company had $136 million of loan modifications to borrowers experiencing financial difficulty, including $81 million of general business loans, $42 million of healthcare loans and $12 million of residential mortgage loans guaranteed by U.S. government agencies. Modifications generally consist of interest rate reductions, an other than insignificant payment delay, term extension or a combination. Approximately $97 million of the modifications are term extensions of healthcare and general business loans, and $38 million are combination modifications to healthcare loans and loans to individuals. During the nine months ended September 30, 2023, $4.0 million of residential mortgage loans were modified and subsequently defaulted with nearly all of these defaulted loans being guaranteed by U.S. government agencies. A payment default is defined as being 30 or more days past due after modification.

Past Due Loans

Past due status for all loan classes is based on the actual number of days since the last payment was due according to the contractual terms of the loans, as modified for short-term payment deferral forbearance.

A summary of loans currently performing and past due as of September 30, 2023 is as follows (in thousands):

			Past Due								Past Due 90 Days or More and Accruing
	Current		30 to 59 Days		60 to 89 Days		90 Days or More		Total
Commercial:
Energy	$	3,490,602	$	—	$	—	$	—	$	3,490,602	$	—
Healthcare	4,051,359		10		—		31,765		4,083,134		—
Services	3,564,401		599		324		1,037		3,566,361		—
General business	3,573,237		37		112		6,356		3,579,742		13
Total commercial	14,679,599		646		436		39,158		14,719,839		13
Commercial real estate	5,233,549		—		488		7,263		5,241,300		—
Loans to individuals:
Residential mortgage	2,077,418		9,713		818		3,043		2,090,992		51
Residential mortgage guaranteed by U.S. government agencies	58,486		31,390		19,004		52,212		161,092		47,670
Personal	1,510,472		298		2		23		1,510,795		—
Total loans to individuals	3,646,376		41,401		19,824		55,278		3,762,879		47,721
Total	$	23,559,524	$	42,047	$	20,748	$	101,699	$	23,724,018	$	47,734

A summary of loans currently performing and past due as of December 31, 2022 is as follows (in thousands):

			Past Due								Past Due 90 Days or More and Accruing
	Current		30 to 59 Days		60 to 89 Days		90 Days or More		Total
Commercial:
Energy	$	3,424,766	$	24	$	—	$	—	$	3,424,790	$	—
Healthcare	3,812,164		5,914		26,480		459		3,845,017		—
Services	3,423,042		1,060		2,461		4,958		3,431,521		—
General business	3,509,094		257		1,424		396		3,511,171		396
Total commercial	14,169,066		7,255		30,365		5,813		14,212,499		396
Commercial real estate	4,606,029		531		—		217		4,606,777		—
Loans to individuals:
Residential mortgage	1,872,155		10,632		1,828		6,169		1,890,784		114
Residential mortgage guaranteed by U.S. government agencies	108,019		36,119		19,400		82,402		245,940		75,604
Personal	1,600,595		502		21		32		1,601,150		—
Total loans to individuals	3,580,769		47,253		21,249		88,603		3,737,874		75,718
Total	$	22,355,864	$	55,039	$	51,614	$	94,633	$	22,557,150	$	76,114

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Mortgage Banking Activities

9 Months Ended

Sep. 30, 2023

Mortgage Banking [Abstract]

Mortgage Banking Activities [Text Block]

Mortgage Banking Activities

Residential Mortgage Loan Production

The Company originates, markets and services conventional and government-sponsored residential mortgage loans. Generally, conforming fixed rate residential mortgage loans are held for sale in the secondary market, and non-conforming and adjustable-rate residential mortgage loans are retained for investment. Residential mortgage loans originated for sale by the Company are carried at fair value based on sales commitments and market quotes. Changes in the fair value of mortgage loans held for sale are included in Other operating revenue – Mortgage banking revenue. Residential mortgage loans held for sale also includes the fair value of residential mortgage loan commitments and forward sales commitments, which are considered derivative contracts that have not been designated as hedging instruments for accounting purposes. The volume of mortgage loans originated for sale and secondary market prices are the primary drivers of originating and marketing revenue.

Residential mortgage loan commitments are generally outstanding for 60 to 90 days, which represents the typical period from commitment to originate a residential mortgage loan to when the closed loan is sold to an investor. Residential mortgage loan commitments are subject to both credit and interest rate risk. Credit risk is managed through underwriting policies and procedures, including collateral requirements, which are generally accepted by the secondary loan markets. Exposure to interest rate fluctuations is partially managed through forward sales of residential mortgage-backed securities and forward sales contracts. These latter contracts set the price for loans that will be delivered in the next 60 to 90 days.

The unpaid principal balance of residential mortgage loans held for sale, notional amounts of derivative contracts related to residential mortgage loan commitments and forward contract sales and their related fair values included in Mortgage loans held for sale on the Consolidated Balance Sheets were (in thousands):

	September 30, 2023				December 31, 2022
	Unpaid Principal Balance/ Notional		Fair Value		Unpaid Principal Balance/ Notional		Fair Value
Residential mortgage loans held for sale	$	71,304	$	69,653	$	74,941	$	73,938
Residential mortgage loan commitments	49,285		1,541		45,492		1,054
Forward sales contracts	102,529		1,295		109,469		280
			$	72,489			$	75,272

No residential mortgage loans held for sale were 90 days or more past due or considered impaired as of September 30, 2023 or December 31, 2022. No credit losses were recognized on residential mortgage loans held for sale for the nine month period ended September 30, 2023 and 2022.

Mortgage banking revenue was as follows (in thousands):

	Three Months Ended September 30,				Nine Months Ended Sep. 30,
	2023		2022		2023		2022
Production revenue:
Net realized gains (losses) on sale of mortgage loans	$	(1,631)	$	(1,072)	$	(3,658)	$	8,969
Net change in unrealized loss on mortgage loans held for sale	(522)		(6,244)		(648)		(9,764)
Net change in the fair value of mortgage loan commitments	(288)		(3,174)		487		(5,474)
Net change in the fair value of forward sales contracts	554		8,084		1,015		8,414
Total production revenue (loss)	(1,887)		(2,406)		(2,804)		2,145
Servicing revenue	15,243		13,688		45,668		37,155
Total mortgage banking revenue	$	13,356	$	11,282	$	42,864	$	39,300

Production revenue includes gain (loss) on residential mortgage loans held for sale and changes in the fair value of derivative contracts not designated as hedging instruments for accounting purposes related to residential mortgage loan commitments and forward sales contracts. Servicing revenue includes servicing fee income and late charges on loans serviced for others.

Residential Mortgage Servicing

Mortgage servicing rights may be originated or purchased. Both originated and purchased mortgage servicing rights are initially recognized at fair value. The Company has elected to carry all mortgage servicing rights at fair value. Changes in the fair value are recognized in earnings as they occur. The unpaid principal balance of loans serviced for others is the primary driver of servicing revenue.

The following represents a summary of mortgage servicing rights (dollars in thousands):

	September 30, 2023			December 31, 2022
Number of residential mortgage loans serviced for others	116,941			110,541
Outstanding principal balance of residential mortgage loans serviced for others	$	20,607,013		$	18,863,201
Weighted average interest rate	3.61		%	3.59		%
Remaining term (in months)	282			283

The following represents activity in capitalized mortgage servicing rights (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Beginning Balance	$	304,722	$	270,312	$	277,608	$	163,198
Additions	3,154		4,841		9,757		15,810
Acquisitions	2,669		1,043		33,807		45,910
Change in fair value due to principal payments	(7,202)		(8,960)		(21,031)		(24,277)
Change in fair value due to market assumption changes	8,039		16,570		11,241		83,165
Ending Balance	$	311,382	$	283,806	$	311,382	$	283,806

Changes in the fair value of mortgage servicing rights due to market assumption changes are included in Other operating revenue in the Consolidated Statements of Earnings. Changes in fair value due to principal payments are included in Mortgage banking costs. 

Mortgage servicing rights are not traded in active markets. Fair value is determined by discounting the projected net cash flows. Significant market assumptions used to determine fair value based on significant unobservable inputs were as follows:

	September 30, 2023	December 31, 2022
Discount rate – risk-free rate plus a market premium	9.84%	9.51%
Prepayment rate - based upon loan interest rate, original term and loan type	7.15%	7.54%
Loan servicing costs – annually per loan based upon loan type:
Performing loans	$69 - $94	$69 - $94
Delinquent loans	$150 - $500	$150 - $500
Loans in foreclosure	$875 - $8,000	$875 - $8,000
Escrow earnings rate – indexed to rates paid on deposit accounts with comparable average life	4.66%	4.06%
Primary/secondary mortgage rate spread	105 bps	105 bps
Delinquency rate	2.00%	2.33%

Changes in primary residential mortgage interest rates directly affect the prepayment speeds used in valuing our mortgage servicing rights. A separate third-party model is used to estimate prepayment speeds based on interest rates, housing turnover rates, estimated loan curtailment, anticipated defaults and other relevant factors. The prepayment model is updated periodically for changes in market conditions and adjusted to better correlate with actual performance of BOK Financial's servicing portfolio.

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Commitments and Contingent Liabilities

9 Months Ended

Sep. 30, 2023

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingent Liabilities [Text Block]

Commitments and Contingent Liabilities

Litigation Contingencies

On June 24, 2015, BOKF, NA received a complaint that an employee had colluded with a bond issuer and an individual in misusing revenues pledged to municipal bonds for which BOKF, NA served as trustee under the bond indenture. The Company conducted an investigation and concluded that employees in one of its Corporate Trust offices had, with respect to a single group of affiliated bond issuances, violated Company policies and procedures. The relationship manager was terminated. The Company reported the circumstances to, and cooperated with an investigation by, the Securities and Exchange Commission ("SEC"). On September 7, 2016, BOKF, NA agreed to, and the SEC entered, a consent order finding that BOKF, NA had violated Section 17(a) of the Securities Act of 1933 and Section 10(b) of the Securities Exchange Act and required BOKF, NA to disgorge $1,067,721 of fees and pay a civil penalty of $600,000. BOKF, NA disgorged the fees and paid the penalty. On August 26, 2016, BOKF, NA was sued in the United States District Court for New Jersey by two bondholders in a putative class action alleging BOKF, NA participated in the fraudulent sale of securities by the principals. While the action remains stayed with no current deadlines pending, plaintiffs informed the Court of their intent to request the stay be lifted in a joint status report in July but have yet to do so. BOKF, NA plans to oppose any request to lift the stay. On September 14, 2016, BOKF, NA was sued in the District Court of Tulsa County, Oklahoma by 19 bondholders also alleging BOKF, NA participated in the fraudulent sale of securities by the principals. On April 18, 2023 seven plaintiffs dismissed their claims without prejudice. Discovery on the remaining plaintiff's claims is ongoing. Management is advised by counsel that, in the Tulsa County District Court action, a loss is not probable and that the loss, if any, cannot be reasonably estimated.

On December 28, 2015, in an action brought by the SEC, the New Jersey District Court entered a judgment against the principals involved in issuing the bonds. On January 8, 2020, the Court entered judgment against the principal individual and his wife for $36,805,051 in principal amount and $10,937,831 in pre-judgment interest. The SEC continues to aggressively pursue collection of the judgment. If the individual principal and his wife cannot pay the bonds, a bondholder loss could become probable. Management has been advised by counsel that BOKF, NA has valid defenses to claims of bondholders and that no loss to the Company is probable. No provision for losses has been made at this time. BOKF, NA estimates that, upon sale of all remaining collateral securing payment of the bonds, approximately $30 million in principal will remain outstanding. A reasonable estimate cannot be made of the amount of any bondholder loss, though the amount of bondholder loss could be material to the Company in the event a loss to the Company becomes probable.

In the ordinary course of business, BOK Financial and its subsidiaries are subject to legal actions and complaints. Management believes, based upon the opinion of counsel, that the actions and liability or loss, if any, resulting from the final outcomes of the proceedings, will not have a material effect on the Company's financial condition, results of operations or cash flows.

Alternative Investment Commitments

The Company invests in several tax credit entities and other funds as permitted by banking regulations. Consolidation of these investments is based on the variable interest model.

At September 30, 2023, the Company has $413 million in interests in various alternative investments generally consisting of unconsolidated limited partnership interests in entities for which investment return is in the form of low income housing tax credits or other investments in merchant banking activities. These investments are recognized in Other assets on the Consolidated Balance Sheets. This investment balance also includes $104 million of unfunded commitments included in Other liabilities on the Consolidated Balance Sheets.

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Shareholders' Equity

9 Months Ended

Sep. 30, 2023

Stockholders' Equity Note [Abstract]

Shareholders' Equity [Text Block]

Shareholders' Equity

On October 31, 2023, the Company declared a quarterly cash dividend of $0.55 per common share payable on or about November 30, 2023 to shareholders of record as of November 15, 2023.

Dividends declared were $0.54 and $1.62 per share during the three and nine months ended September 30, 2023 and $0.53 and $1.59 per share during the three and nine months ended September 30, 2022.

Accumulated Other Comprehensive Income (Loss)

AOCI includes unrealized gains and losses on available for sale ("AFS") securities. AOCI also includes unrealized losses on AFS securities that were transferred from AFS to investment securities in the second quarter of 2022. Such amounts are being amortized over the estimated remaining life of the security as an adjustment to yield, offsetting the related amortization of premium on the transferred securities. Gains and losses in AOCI are net of deferred income taxes.

A rollforward of the components of accumulated other comprehensive income (loss) is included as follows (in thousands):

	Unrealized Gain (Loss) on
	Available for Sale Securities		Investment Securities Transferred from AFS		Employee Benefit Plans		Total
Balance, Dec. 31, 2021	$	69,775	$	—	$	2,596	$	72,371
Net change in unrealized gain (loss)	(1,293,661)		—		—		(1,293,661)
Transfer of net unrealized loss from AFS to investment securities	267,509		(267,509)		—		—
Reclassification adjustments included in earnings:
Interest revenue, Investment securities	—		24,130		—		24,130
Operating expense, Personnel	—		—		(3,483)		(3,483)
Gain on available for sale securities, net	(3,017)		—		—		(3,017)
Other comprehensive loss, before income taxes	(1,029,169)		(243,379)		(3,483)		(1,276,031)
Federal and state income taxes	(240,868)		(56,960)		(887)		(298,715)
Other comprehensive loss, net of income taxes	(788,301)		(186,419)		(2,596)		(977,316)
Balance, September 30, 2022	$	(718,526)	$	(186,419)	$	—	$	(904,945)
Balance, Dec. 31, 2022	$	(664,618)	$	(172,337)	$	—	$	(836,955)
Net change in unrealized gain (loss)	(171,977)		—		—		(171,977)
Reclassification adjustments included in earnings:
Interest revenue, Investment securities	—		46,996		—		46,996
Loss on available for sale securities, net	3,010		—		—		3,010
Other comprehensive income (loss), before income taxes	(168,967)		46,996		—		(121,971)
Federal and state income taxes	(40,735)		10,794		—		(29,941)
Other comprehensive income (loss), net of income taxes	(128,232)		36,202		—		(92,030)
Balance, September 30, 2023	$	(792,850)	$	(136,135)	$	—	$	(928,985)

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Earnings Per Share

9 Months Ended

Sep. 30, 2023

Earnings Per Share [Abstract]

Earnings Per Share [Text Block]

Earnings Per Share

(In thousands, except share and per share amounts)	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Numerator:
Net income attributable to BOK Financial Corp. shareholders	$	134,495	$	156,510	$	448,171	$	351,844
Less: Earnings allocated to participating securities	1,104		1,161		3,561		2,562
Numerator for basic earnings per share – income available to common shareholders	133,391		155,349		444,610		349,282
Effect of reallocating undistributed earnings of participating securities	—		—		—		—
Numerator for diluted earnings per share – income available to common shareholders	$	133,391	$	155,349	$	444,610	$	349,282
Denominator:
Weighted average shares outstanding	66,090,988		67,503,041		66,484,557		67,902,592
Less:  Participating securities included in weighted average shares outstanding	542,681		499,842		529,263		492,803
Denominator for basic earnings per common share	65,548,307		67,003,199		65,955,294		67,409,789
Dilutive effect of employee stock compensation plans	—		1,424		—		1,433
Denominator for diluted earnings per common share	65,548,307		67,004,623		65,955,294		67,411,222
Basic earnings per share	$	2.04	$	2.32	$	6.74	$	5.18
Diluted earnings per share	$	2.04	$	2.32	$	6.74	$	5.18

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Reportable Segments

9 Months Ended

Sep. 30, 2023

Segment Reporting [Abstract]

Reportable Segments [Text Block]

Reportable Segments

Reportable segments reconciliation to the Consolidated Financial Statements for the three months ended September 30, 2023 is as follows (in thousands):

	Commercial		Consumer		Wealth Management		Funds Management and Other		BOK Financial Consolidated
Net interest revenue from external sources	$	298,293	$	11,386	$	7,622	$	(16,405)	$	300,896
Net interest revenue (expense) from internal sources	(43,829)		101,222		28,815		(86,208)		—
Net interest revenue (expense)	254,464		112,608		36,437		(102,613)		300,896
Net loans charged off and provision for credit losses	4,904		(73)		9		2,160		7,000
Net interest revenue after provision for credit losses	249,560		112,681		36,428		(104,773)		293,896
Other operating revenue	59,153		30,716		123,614		(15,331)		198,152
Other operating expense	81,751		54,497		89,367		98,698		324,313
Net direct contribution	226,962		88,900		70,675		(218,802)		167,735
Gain (loss) on financial instruments, net	(11)		(9,183)		—		9,194		—
Change in fair value of mortgage servicing rights	—		8,039		—		(8,039)		—
Gain (loss) on repossessed assets, net	(268)		11		—		257		—
Corporate expense allocations	17,834		11,920		14,331		(44,085)		—
Net income (loss) before taxes	208,849		75,847		56,344		(173,305)		167,735
Federal and state income taxes	50,919		17,838		13,315		(48,816)		33,256
Net income (loss)	157,930		58,009		43,029		(124,489)		134,479
Net income attributable to non-controlling interests	—		—		—		(16)		(16)
Net income (loss) attributable to BOK Financial Corp. shareholders	$	157,930	$	58,009	$	43,029	$	(124,473)	$	134,495
Average assets	$	28,849,597	$	9,379,478	$	14,740,641	$	(3,650,164)	$	49,319,552

Reportable segments reconciliation to the Consolidated Financial Statements for the nine months ended September 30, 2023 is as follows (in thousands):

	Commercial		Consumer		Wealth Management		Funds Management and Other		BOK Financial Consolidated
Net interest revenue from external sources	$	886,263	$	50,360	$	32,977	$	5,905	$	975,505
Net interest revenue (expense) from internal sources	(104,543)		285,020		106,918		(287,395)		—
Net interest revenue	781,720		335,380		139,895		(281,490)		975,505
Net loans charged off and provision for credit losses	10,980		2,240		(60)		26,840		40,000
Net interest revenue after provision for credit losses	770,740		333,140		139,955		(308,330)		935,505
Other operating revenue	184,826		93,603		355,568		(48,931)		585,066
Other operating expense	232,364		157,035		256,265		303,134		948,798
Net direct contribution	723,202		269,708		239,258		(660,395)		571,773
Gain (loss) on financial instruments, net	162		(24,113)		—		23,951		—
Change in fair value of mortgage servicing rights	—		11,241		—		(11,241)		—
Gain (loss) on repossessed assets, net	999		25		—		(1,024)		—
Corporate expense allocations	56,956		35,860		39,265		(132,081)		—
Net income (loss) before taxes	667,407		221,001		199,993		(516,628)		571,773
Federal and state income taxes	161,992		51,977		47,200		(138,007)		123,162
Net income (loss)	505,415		169,024		152,793		(378,621)		448,611
Net income attributable to non-controlling interests	—		—		—		440		440
Net income (loss) attributable to BOK Financial Corp. shareholders	$	505,415	$	169,024	$	152,793	$	(379,061)	$	448,171
Average assets	$	28,396,982	$	9,635,204	$	13,128,925	$	(3,412,178)	$	47,748,933

Reportable segments reconciliation to the Consolidated Financial Statements for the three months ended September 30, 2022 is as follows (in thousands):

	Commercial		Consumer		Wealth Management		Funds Management and Other		BOK Financial Consolidated
Net interest revenue from external sources	$	226,016	$	17,482	$	34,746	$	38,081	$	316,325
Net interest revenue (expense) from internal sources	(17,951)		26,469		(1,162)		(7,356)		—
Net interest revenue	208,065		43,951		33,584		30,725		316,325
Net loans charged off and provision for credit losses	(526)		1,408		(22)		14,140		15,000
Net interest revenue after provision for credit losses	208,591		42,543		33,606		16,585		301,325
Other operating revenue	60,386		30,186		113,113		(13,987)		189,698
Other operating expense	75,490		53,236		79,151		86,874		294,751
Net direct contribution	193,487		19,493		67,568		(84,276)		196,272
Gain (loss) on financial instruments, net	4		(21,395)		—		21,391		—
Change in fair value of mortgage servicing rights	—		16,570		—		(16,570)		—
Gain (loss) on repossessed assets, net	(158)		—		—		158		—
Corporate expense allocations	16,438		10,792		12,934		(40,164)		—
Net income before taxes	176,895		3,876		54,634		(39,133)		196,272
Federal and state income taxes	42,761		906		12,826		(16,812)		39,681
Net income	134,134		2,970		41,808		(22,321)		156,591
Net loss attributable to non-controlling interests	—		—		—		81		81
Net income attributable to BOK Financial Corp. shareholders	$	134,134	$	2,970	$	41,808	$	(22,402)	$	156,510
Average assets	$	28,890,429	$	10,233,401	$	13,818,299	$	(7,822,927)	$	45,119,202

Reportable segments reconciliation to the Consolidated Financial Statements for the nine months ended September 30, 2022 is as follows (in thousands):

	Commercial		Consumer		Wealth Management		Funds Management and Other		BOK Financial Consolidated
Net interest revenue from external sources	$	546,599	$	51,183	$	130,389	$	130,583	$	858,754
Net interest revenue (expense) from internal sources	(34,983)		53,764		(3,290)		(15,491)		—
Net interest revenue	511,616		104,947		127,099		115,092		858,754
Net loans charged off and provision for credit losses	3,316		3,716		(153)		8,121		15,000
Net interest revenue after provision for credit losses	508,300		101,231		127,252		106,971		843,754
Other operating revenue	179,501		94,236		224,892		(52,458)		446,171
Other operating expense	210,012		154,685		230,166		251,161		846,024
Net direct contribution	477,789		40,782		121,978		(196,648)		443,901
Gain (loss) on financial instruments, net	(138)		(95,150)		—		95,288		—
Change in fair value of mortgage servicing rights	—		83,165		—		(83,165)		—
Gain (loss) on repossessed assets, net	(2,880)		138		—		2,742		—
Corporate expense allocations	49,285		32,994		37,508		(119,787)		—
Net income before taxes	425,486		(4,059)		84,470		(61,996)		443,901
Federal and state income taxes	103,711		(950)		19,897		(30,658)		92,000
Net income	321,775		(3,109)		64,573		(31,338)		351,901
Net loss attributable to non-controlling interests	—		—		—		57		57
Net income attributable to BOK Financial Corp. shareholders	$	321,775	$	(3,109)	$	64,573	$	(31,395)	$	351,844
Average assets	$	29,324,596	$	10,281,679	$	17,320,779	$	(9,290,763)	$	47,636,291

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Fees and Commissions Revenue Fees and Commissions Revenue

9 Months Ended

Sep. 30, 2023

Revenue from Contract with Customer [Abstract]

Fees and Commissions Revenue [Text Block]

Fees and Commissions Revenue

Fees and commissions revenue is generated through the sales of products, consisting primarily of financial instruments, and the performance of services for customers under contractual obligations. Revenue from providing services for customers is recognized at the time services are provided in an amount that reflects the consideration we expect to be entitled to for those services. Revenue is recognized based on the application of five steps:

•Identify the contract with a customer

•Identify the performance obligations in the contract

•Determine the transaction price

•Allocate the transaction price to the performance obligations in the contract

•Recognize revenue when (or as) the Company satisfies a performance obligation

For contracts with multiple performance obligations, individual performance obligations are accounted for separately if the customer can benefit from the good or service on its own or with other resources readily available to the customer, and the promise to transfer goods and services to the customer is separately identifiable in the contract. The transaction price is allocated to the performance obligations based on relative standalone selling prices.

Revenue is recognized on a gross basis whenever we have primary responsibility and risk in providing the services or products to our customers and have discretion in establishing the price for the services or products. Revenue is recognized on a net basis whenever we act as an agent for products or services of others.

Brokerage and trading revenue includes revenues from trading, customer hedging, retail brokerage and investment banking. Trading revenue includes net realized and unrealized gains primarily related to sales of securities to institutional customers and related derivative contracts. Customer hedging revenue includes realized and unrealized changes in the fair value of derivative contracts held for customer risk management programs including credit valuation adjustments, as necessary. We offer commodity, interest rate, foreign exchange and equity derivatives to our customers. These customer contracts are offset with contracts with selected counterparties and exchanges to minimize changes in market risk from changes in commodity prices, interest rates or foreign exchange rates. Retail brokerage revenue represents fees and commissions earned on sales of fixed income securities, annuities, mutual funds and other financial instruments to retail customers. Investment banking revenue includes fees earned upon completion of underwriting and financial advisory services. Investment banking revenue also includes fees earned in conjunction with loan syndications. Insurance brokerage revenues represents fees and commissions earned on placement of insurance products with carriers for property and casualty and health coverage.

Transaction card revenue includes merchant discount fees and electronic funds transfer network fees, net of interchange fees paid to card issuers and assessments paid to card networks. Merchant discount fees represent fees paid by customers for account management and electronic processing of card transactions. Merchant discount fees are recognized at the time the customer's transactions are processed or other services are performed. The Company also maintains the TransFund electronic funds transfer network for the benefit of its members, which includes the Bank. Electronic funds transfer fees are recognized as electronic transactions processed on behalf of its members. 

Fiduciary and asset management revenue includes fees from asset management, custody, recordkeeping, investment advisory and administration services. Revenue is recognized on an accrual basis at the time the services are performed and may be based on either the fair value of the account or the service provided.

Deposit service charges and fees include commercial account service charges, overdraft fees, check card fee revenue and automated service charge and other deposit service fees. Fees are recognized at least quarterly in accordance with published deposit account agreements and disclosure statements for retail accounts or contractual agreements for commercial accounts. Item charges for overdraft or non-sufficient funds items are recognized as items are presented for payment. Account balance charges and activity fees are accrued monthly and collected in arrears. Commercial account activity fees may be offset by an earnings credit based on account balances. Check card fees represent interchange fees paid by a merchant bank for transactions processed from cards issued by the Company. Check card fees are recognized when transactions are processed.

Mortgage banking revenue includes revenues recognized in conjunction with the origination, marketing and servicing of conventional and government-sponsored residential mortgage loans. Mortgage production revenue includes net realized gains (losses) on sales of residential mortgage loans in the secondary market and the net change in unrealized gains (losses) on residential mortgage loans held for sale. Mortgage production revenue also includes changes in the fair value of derivative contracts not designated as hedging instruments related to residential mortgage loan commitments and forward sales contracts. Mortgage servicing revenue includes servicing fee income and late charges on loans serviced for others.

Fees and commissions revenue by reportable segment and primary service line is as follows for the three months ended September 30, 2023 (in thousands):

	Commercial		Consumer		Wealth Management		Funds Management & Other		Consolidated		Out of Scope1		In Scope2
Trading revenue	$	—	$	—	$	34,461	$	(1)	$	34,460	$	34,460	$	—
Customer hedging revenue	7,403		—		(141)		(407)		6,855		6,855		—
Retail brokerage revenue	—		—		4,357		—		4,357		—		4,357
Insurance brokerage revenue	—		—		2,703		—		2,703		—		2,703
Investment banking revenue	4,508		—		9,428		1		13,937		3,823		10,114
Brokerage and trading revenue	11,911		—		50,808		(407)		62,312		45,138		17,174
TransFund EFT network revenue	21,038		875		(18)		1		21,896		—		21,896
Merchant services revenue	2,430		8		—		—		2,438		—		2,438
Corporate card revenue	1,768		—		179		106		2,053		—		2,053
Transaction card revenue	25,236		883		161		107		26,387		—		26,387
Personal trust revenue	—		—		22,890		(1)		22,889		—		22,889
Corporate trust revenue	—		—		8,713		—		8,713		—		8,713
Institutional trust & retirement plan services revenue	—		—		16,883		—		16,883		—		16,883
Investment management services and other revenue	—		—		3,769		2		3,771		—		3,771
Fiduciary and asset management revenue	—		—		52,255		1		52,256		—		52,256
Commercial account service charge revenue	13,687		524		496		2		14,709		—		14,709
Overdraft fee revenue	26		5,427		39		—		5,492		—		5,492
Check card revenue	—		5,926		—		2		5,928		—		5,928
Automated service charge and other deposit fee revenue	285		1,255		10		(3)		1,547		—		1,547
Deposit service charges and fees	13,998		13,132		545		1		27,676		—		27,676
Mortgage production revenue	—		(1,887)		—		—		(1,887)		(1,887)		—
Mortgage servicing revenue	—		15,861		—		(618)		15,243		15,243		—
Mortgage banking revenue	—		13,974		—		(618)		13,356		13,356		—
Other revenue	6,713		2,726		19,845		(13,419)		15,865		9,236		6,629
Total fees and commissions revenue	$	57,858	$	30,715	$	123,614	$	(14,335)	$	197,852	$	67,730	$	130,122

1     Out of scope revenue generally relates to financial instruments or contractual rights and obligations within the scope of other applicable accounting guidance.

2    In scope revenue represents revenue subject to FASB ASC Topic 606, Revenue from Contracts with Customers.

Fees and commissions revenue by reportable segment and primary service line is as follows for the nine months ended September 30, 2023 (in thousands):

	Commercial		Consumer		Wealth Management		Funds Management & Other		Consolidated		Out of Scope1		In Scope2
Trading revenue	$	—	$	—	$	98,980	$	(1)	$	98,979	$	98,979	$	—
Customer hedging revenue	26,729		—		(200)		2,322		28,851		28,851		—
Retail brokerage revenue	—		—		11,522		—		11,522		—		11,522
Insurance brokerage revenue	—		—		8,866		—		8,866		—		8,866
Investment banking revenue	11,720		—		19,775		1		31,496		10,873		20,623
Brokerage and trading revenue	38,449		—		138,943		2,322		179,714		138,703		41,011
TransFund EFT network revenue	62,020		2,690		(52)		5		64,663		—		64,663
Merchant services revenue	7,074		26		—		—		7,100		—		7,100
Corporate card revenue	5,387		—		540		321		6,248		—		6,248
Transaction card revenue	74,481		2,716		488		326		78,011		—		78,011
Personal trust revenue	—		—		71,732		(1)		71,731		—		71,731
Corporate trust revenue	—		—		23,574		—		23,574		—		23,574
Institutional trust & retirement plan services revenue	—		—		43,843		—		43,843		—		43,843
Investment management services and other revenue	—		—		16,782		(20)		16,762		—		16,762
Fiduciary and asset management revenue	—		—		155,931		(21)		155,910		—		155,910
Commercial account service charge revenue	39,922		1,553		1,461		—		42,936		—		42,936
Overdraft fee revenue	83		15,321		101		1		15,506		—		15,506
Check card revenue	—		17,540		—		2		17,542		—		17,542
Automated service charge and other deposit fee revenue	789		3,801		172		(2)		4,760		—		4,760
Deposit service charges and fees	40,794		38,215		1,734		1		80,744		—		80,744
Mortgage production revenue	—		(2,804)		—		—		(2,804)		(2,804)		—
Mortgage servicing revenue	—		47,412		—		(1,744)		45,668		45,668		—
Mortgage banking revenue	—		44,608		—		(1,744)		42,864		42,864		—
Other revenue	19,673		8,118		58,479		(39,185)		47,085		25,963		21,122
Total fees and commissions revenue	$	173,397	$	93,657	$	355,575	$	(38,301)	$	584,328	$	207,530	$	376,798

1     Out of scope revenue generally relates to financial instruments or contractual rights and obligations within the scope of other applicable accounting guidance.

2    In scope revenue represents revenue subject to FASB ASC Topic 606, Revenue from Contracts with Customers.

Fees and commissions revenue by reportable segment and primary service line is as follows for the three months ended September 30, 2022 (in thousands):

	Commercial		Consumer		Wealth Management		Funds Management & Other		Consolidated		Out of Scope1		In Scope2
Trading revenue	$	—	$	—	$	26,463	$	—	$	26,463	$	26,463	$	—
Customer hedging revenue	8,169		—		257		4,753		13,179		13,179		—
Retail brokerage revenue	—		—		3,839		(1)		3,838		—		3,838
Insurance brokerage revenue	—		—		3,254		—		3,254		—		3,254
Investment banking revenue	6,348		—		7,924		—		14,272		5,990		8,282
Brokerage and trading revenue	14,517		—		41,737		4,752		61,006		45,632		15,374
TransFund EFT network revenue	21,243		910		(19)		2		22,136		—		22,136
Merchant services revenue	1,917		8		—		—		1,925		—		1,925
Corporate card revenue	1,711		—		99		103		1,913		—		1,913
Transaction card revenue	24,871		918		80		105		25,974		—		25,974
Personal trust revenue	—		—		23,927		—		23,927		—		23,927
Corporate trust revenue	—		—		6,513		—		6,513		—		6,513
Institutional trust & retirement plan services revenue	—		—		13,019		(1)		13,018		—		13,018
Investment management services and other revenue	—		—		6,817		(85)		6,732		—		6,732
Fiduciary and asset management revenue	—		—		50,276		(86)		50,190		—		50,190
Commercial account service charge revenue	13,361		473		480		—		14,314		—		14,314
Overdraft fee revenue	29		6,936		19		3		6,987		—		6,987
Check card revenue	—		5,944		—		(2)		5,942		—		5,942
Automated service charge and other deposit fee revenue	201		1,205		54		—		1,460		—		1,460
Deposit service charges and fees	13,591		14,558		553		1		28,703		—		28,703
Mortgage production revenue	—		(2,406)		—		—		(2,406)		(2,406)		—
Mortgage servicing revenue	—		14,206		—		(518)		13,688		13,688		—
Mortgage banking revenue	—		11,800		—		(518)		11,282		11,282		—
Other revenue	5,168		2,954		20,467		(13,110)		15,479		4,227		11,252
Total fees and commissions revenue	$	58,147	$	30,230	$	113,113	$	(8,856)	$	192,634	$	61,141	$	131,493

1     Out of scope revenue generally relates to financial instruments or contractual rights and obligations within the scope of other applicable accounting guidance.

2    In scope revenue represents revenue subject to FASB ASC Topic 606, Revenue from Contracts with Customers.

Fees and commissions revenue by reportable segment and primary service line is as follows for the nine months ended September 30, 2022 (in thousands):

	Commercial		Consumer		Wealth Management		Funds Management & Other		Consolidated		Out of Scope1		In Scope2
Trading revenue	$	—	$	—	$	(15,594)	$	—	$	(15,594)	$	(15,594)	$	—
Customer hedging revenue	28,888		—		1,379		6,983		37,250		37,250		—
Retail brokerage revenue	—		—		12,707		(1)		12,706		—		12,706
Insurance brokerage revenue	—		—		9,810		—		9,810		—		9,810
Investment banking revenue	16,775		—		17,023		—		33,798		15,461		18,337
Brokerage and trading revenue	45,663		—		25,325		6,982		77,970		37,117		40,853
TransFund EFT network revenue	59,763		2,708		(55)		5		62,421		—		62,421
Merchant services revenue	9,425		28		—		—		9,453		—		9,453
Corporate card revenue	4,681		—		276		299		5,256		—		5,256
Transaction card revenue	73,869		2,736		221		304		77,130		—		77,130
Personal trust revenue	—		—		73,551		—		73,551		—		73,551
Corporate trust revenue	—		—		16,947		—		16,947		—		16,947
Institutional trust & retirement plan services revenue	—		—		39,009		—		39,009		—		39,009
Investment management services and other revenue	—		—		17,050		(130)		16,920		—		16,920
Fiduciary and asset management revenue	—		—		146,557		(130)		146,427		—		146,427
Commercial account service charge revenue	40,283		1,392		1,516		—		43,191		—		43,191
Overdraft fee revenue	89		19,673		63		4		19,829		—		19,829
Check card revenue	—		17,502		—		—		17,502		—		17,502
Automated service charge and other deposit fee revenue	245		3,373		65		2		3,685		—		3,685
Deposit service charges and fees	40,617		41,940		1,644		6		84,207		—		84,207
Mortgage production revenue	—		2,145		—		—		2,145		2,145		—
Mortgage servicing revenue	—		38,650		—		(1,495)		37,155		37,155		—
Mortgage banking revenue	—		40,795		—		(1,495)		39,300		39,300		—
Other revenue	14,843		8,837		51,160		(36,232)		38,608		19,402		19,206
Total fees and commissions revenue	$	174,992	$	94,308	$	224,907	$	(30,565)	$	463,642	$	95,819	$	367,823

1     Out of scope revenue generally relates to financial instruments or contractual rights and obligations within the scope of other applicable accounting guidance.

2    In scope revenue represents revenue subject to FASB ASC Topic 606, Revenue from Contracts with Customers.

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Fair Value Measurements

9 Months Ended

Sep. 30, 2023

Fair Value Disclosures [Abstract]

Fair Value Measurements [Text Block]

Fair Value Measurements

Fair value is defined by applicable accounting guidance as the price to sell an asset or transfer a liability in an orderly transaction between market participants in the principal market for the given asset or liability at the measurement date based on market conditions at that date. An orderly transaction assumes exposure to the market for a customary period for marketing activities prior to the measurement date and not a forced liquidation or distressed sale. Certain assets and liabilities are recorded in the Company's financial statements at fair value. Some are recorded on a recurring basis and some on a non-recurring basis.

For some assets and liabilities, observable market transactions and market information might be available. For other assets and liabilities, observable market transactions and market information might not be available. A hierarchy for fair value has been established which categorizes into three levels the inputs to valuation techniques used to measure fair value. The three levels are as follows:

Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) - Fair value is based on unadjusted quoted prices in active markets for identical assets or liabilities.

Significant Other Observable Inputs (Level 2) - Fair value is based on significant other observable inputs which are generally determined based on a single price for each financial instrument provided to us by an applicable third-party pricing service and is based on one or more of the following:

•Quoted prices for similar, but not identical, assets or liabilities in active markets;

•Quoted prices for identical or similar assets or liabilities in inactive markets;

•Inputs other than quoted prices that are observable, such as interest rate and yield curves, volatilities, prepayment speeds, loss severities, credit risks and default rates;

•Other inputs derived from or corroborated by observable market inputs.

Significant Unobservable Inputs (Level 3) - Fair value is based upon model-based valuation techniques for which at least one significant assumption is not observable in the market.

Transfers between levels are recognized as of the end of the reporting period. There were no transfers in or out of quoted prices in active markets for identical instruments to significant other observable inputs or significant unobservable inputs during the three and nine months ended September 30, 2023 and 2022, respectively. Transfers between significant other observable inputs and significant unobservable inputs during the three and nine months ended September 30, 2023 and 2022 were immaterial.

The underlying methods used by the third-party pricing services are considered in determining the primary inputs used to determine fair values. Management has evaluated the methodologies employed by the third-party pricing services by comparing the price provided by the pricing service with other sources, including brokers' quotes, sales or purchases of similar instruments and discounted cash flows to establish a basis for reliance on the pricing service values. Significant differences between the pricing service provided value and other sources are discussed with the pricing service to understand the basis for their values. Based on all observable inputs, management may adjust prices obtained from third-party pricing services to more appropriately reflect the prices that would be received to sell assets or paid to transfer liabilities in orderly transactions in the current market. No significant adjustments were made to prices provided by third-party pricing services at September 30, 2023 or December 31, 2022.

Assets and Liabilities Measured at Fair Value on a Recurring Basis

The fair value of financial assets and liabilities measured on a recurring basis was as follows as of September 30, 2023 (in thousands):

	Total		Quoted Prices in Active Markets for Identical Instruments (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Trading securities:
U.S. government securities	$	18,843	$	17,932	$	911	$	—
Residential agency mortgage-backed securities	4,653,161		—		4,653,161		—
Municipal securities	51,998		—		51,998		—
Other trading securities	24,099		—		24,099		—
Total trading securities	4,748,101		17,932		4,730,169		—
Available for sale securities:
U.S. Treasury	897		897		—		—
Municipal securities	488,269		—		488,269		—
Residential agency mortgage-backed securities	6,216,955		—		6,216,955		—
Residential non-agency mortgage-backed securities	715,806		—		715,806		—
Commercial agency mortgage-backed securities	4,484,247		—		4,484,247		—
Other debt securities	473		—		—		473
Total available for sale securities	11,906,647		897		11,905,277		473
Fair value option securities — Residential agency mortgage-backed securities	20,215		—		20,215		—
Residential mortgage loans held for sale1	72,489		—		65,179		7,310
Mortgage servicing rights2	311,382		—		—		311,382
Derivative contracts, net of cash collateral3	546,109		1,596		544,513		—
Liabilities:
Derivative contracts, net of cash collateral3	403,947		190		403,757		—

1Residential mortgage loans held for sale measured at fair value on a recurring basis using significant unobservable inputs (Level 3) consist of residential mortgage loans intended for sale to U.S. government agencies that fail to meet conforming standards and are valued at 78.46% of the unpaid principal balance.

2A reconciliation of the beginning and ending fair value of mortgage servicing rights and disclosures of significant assumptions used to determine fair value are presented in Note 5, Mortgage Banking Activities.

3See Note 3 for detail of fair value of derivative contracts by contract type. Derivative contracts in asset and liability positions that were valued based on quoted prices in active markets for identical instruments (Level 1) are primarily exchange-traded interest rate derivative contracts held for trading purposes.

The fair value of financial assets and liabilities measured on a recurring basis was as follows as of December 31, 2022 (in thousands):

	Total		Quoted Prices in Active Markets for Identical Instruments (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Trading securities:
U.S. government securities	$	9,823	$	4,970	$	4,853	$	—
Residential agency mortgage-backed securities	4,406,848		—		4,406,848		—
Municipal securities	21,484		—		21,484		—
Other trading securities	26,006		—		26,006		—
Total trading securities	4,464,161		4,970		4,459,191		—
Available for sale securities:
U.S. Treasury	898		898		—		—
Municipal securities	624,500		—		624,500		—
Residential agency mortgage-backed securities	5,814,496		—		5,814,496		—
Residential non-agency mortgage-backed securities	577,576		—		577,576		—
Commercial agency mortgage-backed securities	4,475,917		—		4,475,917		—
Other debt securities	473		—		—		473
Total available for sale securities	11,493,860		898		11,492,489		473
Fair value option securities — Residential agency mortgage-backed securities	296,590		—		296,590		—
Residential mortgage loans held for sale1	75,272		—		68,054		7,218
Mortgage servicing rights2	277,608		—		—		277,608
Derivative contracts, net of cash collateral3	880,343		2,110		878,233		—
Liabilities:
Derivative contracts, net of cash collateral3	554,900		16		554,884		—

1Residential mortgage loans held for sale measured at fair value on a recurring basis using significant unobservable inputs (Level 3) consist of residential mortgage loans intended for sale to U.S. government agencies that fail to meet conforming standards and are valued at 77.55% of the unpaid principal balance.

2A reconciliation of the beginning and ending fair value of mortgage servicing rights and disclosures of significant assumptions used to determine fair value are presented in Note 5, Mortgage Banking Activities.

3See Note 3 for detail of fair value of derivative contracts by contract type. Derivative contracts in asset and liability positions that were valued based on quoted prices in active markets for identical instruments (Level 1) are primarily exchange-traded interest rate derivative contracts held for trading purposes.

Following is a description of the Company's valuation methodologies used for assets and liabilities measured on a recurring basis:

Securities

The fair values of trading, available for sale and fair value option securities are based on quoted prices for identical instruments in active markets, when available. If quoted prices for identical instruments are not available, fair values are based on significant other observable inputs such as quoted prices of comparable instruments or interest rates and credit spreads, yield curves, volatilities, prepayment speeds and loss severities. The Company has elected to carry all residential mortgage-backed securities guaranteed by U.S. government agencies held as economic hedges against changes in the fair value of mortgage servicing rights at fair value with changes in the fair value recognized in earnings.

The fair value of certain available for sale municipal and other debt securities may be based on significant unobservable inputs. These significant unobservable inputs include limited observed trades, projected cash flows, current credit rating of the issuers and, when applicable, the insurers of the debt and observed trades of similar debt. Discount rates are primarily based on references to interest rate spreads on comparable 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 securities. A summary of significant inputs used to value these securities follows. A management committee composed of senior members from the Company's Corporate Treasury, Risk Management and Finance departments assesses the appropriateness of these inputs quarterly.

Derivatives

All derivative instruments are carried on the balance sheet at fair value. Fair values for exchange-traded contracts are based on quoted prices. Fair values for over-the-counter interest rate, commodity and foreign exchange contracts are based on valuations provided either by third-party dealers in the contracts, quotes provided by independent pricing services, or a third-party provided pricing model that uses significant other observable market inputs.

Credit risk is considered in determining the fair value of derivative instruments. Management determines fair value adjustments based on various risk factors including, but not limited to, current fair value, probability of default and loss given default.

We also consider our own credit risk in determining the fair value of derivative contracts. Changes in our credit rating would affect the fair value of our derivative liabilities. In the event of a credit downgrade, the fair value of our derivative liabilities would increase.

Residential Mortgage Loans Held for Sale

Residential mortgage loans held for sale are carried on the balance sheet at fair value. The Company has elected to carry all residential mortgage loans originated for sale at fair value. Changes in the fair value of these financial instruments are recognized in earnings. The fair values of residential mortgage loans held for sale are based upon quoted market prices of such loans sold in securitization transactions, including related unfunded loan commitments and forward sales contracts. The fair value of mortgage loans that were unable to be sold to U.S. government agencies were determined using quoted prices of loans that are sold in securitization transactions with a liquidity discount applied.

Fair Value of Assets and Liabilities Measured on a Non-Recurring Basis

Assets measured at fair value on a non-recurring basis include collateral for certain nonaccruing loans and real property and other assets acquired to satisfy loans, which are based primarily on comparisons to completed sales of similar assets.

The following represents the carrying value of assets measured at fair value on a non-recurring basis (and related losses) during the period. The carrying value represents only those assets with a balance at September 30, 2023 for which the fair value was adjusted during the nine months ended September 30, 2023 (in thousands):

							Fair Value Adjustments for the
	Carrying Value at September 30, 2023						Three Months Ended Sep. 30, 2023 Recognized in:				Nine Months Ended Sep. 30, 2023 Recognized in:
	Quoted Prices in Active Markets for Identical Instruments		Significant Other Observable Inputs		Significant Unobservable Inputs		Gross charge-offs against allowance for loan losses		Other gains (losses), net		Gross charge-offs against allowance for loan losses		Other gains (losses), net
Nonaccruing loans	$	—	$	—	$	796	$	2,135	$	—	$	4,932	$	—

The following represents the carrying value of assets measured at fair value on a non-recurring basis (and related losses) during the period. The carrying value represents only those assets with a balance at September 30, 2022 for which the fair value was adjusted during the nine months ended September 30, 2022 (in thousands):

							Fair Value Adjustments for the
	Carrying Value at September 30, 2022						Three Months Ended Sep. 30, 2022 Recognized in:				Nine Months Ended Sep. 30, 2022 Recognized in:
	Quoted Prices in Active Markets for Identical Instruments		Significant Other Observable Inputs		Significant Unobservable Inputs		Gross charge-offs against allowance for loan losses		Other gains (losses), net		Gross charge-offs against allowance for loan losses		Other gains (losses), net
Nonaccruing loans	$	—	$	159	$	126	$	22	$	—	$	499	$	—
Real estate and other repossessed assets	—		649		1,699		—		—		—		(5,705)

The fair value of collateral-dependent nonaccruing loans secured by real estate and real estate and other repossessed assets and the related fair value adjustments are generally based on unadjusted third-party appraisals. Our appraisal review policies require appraised values to be supported by observed inputs derived principally from or corroborated by observable market data. Appraisals that are not based on observable inputs or that require significant adjustments or fair value measurements that are not based on third-party appraisals are considered to be based on significant unobservable inputs. Non-recurring fair value measurements of collateral-dependent nonaccruing loans and real estate and other repossessed assets based on significant unobservable inputs are generally due to estimates of current fair values between appraisal dates. Significant unobservable inputs include listing prices for the same or comparable assets, uncorroborated expert opinions or management's knowledge of the collateral or industry. Non-recurring fair value measurements of collateral dependent loans secured by mineral rights are generally determined by our internal staff of engineers on projected cash flows under current market conditions and are based on significant unobservable inputs. Projected cash flows are discounted according to risk characteristics of the underlying oil and gas properties. Assets are evaluated to demonstrate with reasonable certainty that crude oil, natural gas and natural gas liquids can be recovered from known oil and gas reservoirs under existing economic and operating conditions at current prices with existing conventional equipment, operating methods and costs. Significant unobservable inputs are developed by asset management and workout professionals and approved by senior Credit Administration executives.

A summary of quantitative information about Non-recurring Fair Value Measurements based on Significant Unobservable Inputs (Level 3) as of September 30, 2023 follows (dollars in thousands):

	Fair Value		Valuation Technique(s)	Unobservable Input	Range (Weighted Average)
Nonaccruing loans	$	796	Discounted cash flows	Management knowledge of industry and non-real estate collateral	12% - 14% (14%)1

1    Represents fair value as a percentage of the unpaid principal balance.    

A summary of quantitative information about Non-recurring Fair Value Measurements based on Significant Unobservable Inputs (Level 3) as of September 30, 2022 follows (dollars in thousands):

	Fair Value		Valuation Technique(s)	Unobservable Input	Range (Weighted Average)
Nonaccruing loans	$	126	Discounted cash flows	Management knowledge of industry and non-real estate collateral including, but not limited to, recoverable oil and gas reserves, forward-looking commodity prices, estimated operating costs	25% - 25% (25%)1
Real estate and other repossessed assets	1,699		Discounted cash flows	Management knowledge of industry and non-real estate collateral	N/A

1    Represents fair value as a percentage of the unpaid principal balance.

Fair Value of Financial Instruments

The following table presents the carrying values and estimated fair values of all financial instruments, including those financial assets and liabilities that are not measured and reported at fair value on a recurring basis or are measured at fair value on a non-recurring basis as of September 30, 2023 (in thousands):

	Carrying Value		Estimated Fair Value		Quoted Prices in Active Markets for Identical Instruments (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Cash and due from banks	$	854,161	$	854,161	$	854,161	$	—	$	—
Interest-bearing cash and cash equivalents	520,774		520,774		520,774		—		—
Trading securities:
U.S. government securities	18,843		18,843		17,932		911		—
Residential agency mortgage-backed securities	4,653,161		4,653,161		—		4,653,161		—
Municipal securities	51,998		51,998		—		51,998		—
Other trading securities	24,099		24,099		—		24,099		—
Total trading securities	4,748,101		4,748,101		17,932		4,730,169		—
Investment securities:
Municipal securities	121,003		122,695		—		11,957		110,738
Residential agency mortgage-backed securities	2,146,133		1,901,143		—		1,901,143		—
Commercial agency mortgage-backed securities	15,838		14,371		—		14,371		—
Other debt securities	15,788		14,158		—		14,158		—
Total investment securities	2,298,762		2,052,367		—		1,941,629		110,738
Allowance for credit losses	(344)		—		—		—		—
Investment securities, net of allowance	2,298,418		2,052,367		—		1,941,629		110,738
Available for sale securities:
U.S. Treasury	897		897		897		—		—
Municipal securities	488,269		488,269		—		488,269		—
Residential agency mortgage-backed securities	6,216,955		6,216,955		—		6,216,955		—
Residential non-agency mortgage-backed securities	715,806		715,806		—		715,806		—
Commercial agency mortgage-backed securities	4,484,247		4,484,247		—		4,484,247		—
Other debt securities	473		473		—		—		473
Total available for sale securities	11,906,647		11,906,647		897		11,905,277		473
Fair value option securities — Residential agency mortgage-backed securities	20,215		20,215		—		20,215		—
Residential mortgage loans held for sale	72,489		72,489		—		65,179		7,310
Loans:
Commercial	14,719,839		14,603,075		—		—		14,603,075
Commercial real estate	5,241,300		5,094,865		—		—		5,094,865
Loans to individuals	3,762,879		3,512,686		—		—		3,512,686
Total loans	23,724,018		23,210,626		—		—		23,210,626
Allowance for loan losses	(272,114)		—		—		—		—
Loans, net of allowance	23,451,904		23,210,626		—		—		23,210,626
Mortgage servicing rights	311,382		311,382		—		—		311,382
Derivative instruments with positive fair value, net of cash collateral	546,109		546,109		1,596		544,513		—
Deposits with no stated maturity	30,725,335		30,725,335		—		—		30,725,335
Time deposits	2,927,217		2,986,307		—		—		2,986,307
Other borrowed funds	8,924,642		8,922,567		—		—		8,922,567
Subordinated debentures	131,152		116,911		—		116,911		—
Derivative instruments with negative fair value, net of cash collateral	403,947		403,947		190		403,757		—

The following table presents the carrying values and estimated fair values of all financial instruments, including those financial assets and liabilities that are not measured and reported at fair value on a recurring basis or are measured at fair value on a non-recurring basis as of December 31, 2022 (in thousands):

	Carrying Value		Estimated Fair Value		Quoted Prices in Active Markets for Identical Instruments (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Cash and due from banks	$	943,810	$	943,810	$	943,810	$	—	$	—
Interest-bearing cash and cash equivalents	457,906		457,906		457,906		—		—
Trading securities:
U.S. government securities	9,823		9,823		4,970		4,853		—
Residential agency mortgage-backed securities	4,406,848		4,406,848		—		4,406,848		—
Municipal securities	21,484		21,484		—		21,484		—
Other trading securities	26,006		26,006		—		26,006		—
Total trading securities	4,464,161		4,464,161		4,970		4,459,191		—
Investment securities:
Municipal securities	170,629		176,621		—		38,106		138,515
Residential agency mortgage-backed securities	2,315,219		2,143,360		—		2,143,360		—
Commercial agency mortgage-backed securities	15,609		14,588		—		14,588		—
Other debt securities	12,788		12,199		—		12,199		—
Total investment securities	2,514,245		2,346,768		—		2,208,253		138,515
Allowance for credit losses	(558)		—		—		—		—
Investment securities, net of allowance	2,513,687		2,346,768		—		2,208,253		138,515
Available for sale securities:
U.S. Treasury	898		898		898		—		—
Municipal securities	624,500		624,500		—		624,500		—
Residential agency mortgage-backed securities	5,814,496		5,814,496		—		5,814,496		—
Residential non-agency mortgage-backed securities	577,576		577,576		—		577,576		—
Commercial agency mortgage-backed securities	4,475,917		4,475,917		—		4,475,917		—
Other debt securities	473		473		—		—		473
Total available for sale securities	11,493,860		11,493,860		898		11,492,489		473
Fair value option securities — Residential agency mortgage-backed securities	296,590		296,590		—		296,590		—
Residential mortgage loans held for sale	75,272		75,272		—		68,054		7,218
Loans:
Commercial	14,212,499		13,905,765		—		—		13,905,765
Commercial real estate	4,606,777		4,454,048		—		—		4,454,048
Loans to individuals	3,737,874		3,531,410		—		—		3,531,410
Total loans	22,557,150		21,891,223		—		—		21,891,223
Allowance for loan losses	(235,704)		—		—		—		—
Loans, net of allowance	22,321,446		21,891,223		—		—		21,891,223
Mortgage servicing rights	277,608		277,608		—		—		277,608
Derivative instruments with positive fair value, net of cash collateral	880,343		880,343		2,110		878,233		—
Deposits with no stated maturity	33,018,863		33,018,863		—		—		33,018,863
Time deposits	1,461,842		1,431,245		—		—		1,431,245
Other borrowed funds	7,007,285		7,005,305		—		—		7,005,305
Subordinated debentures	131,205		121,497		—		121,497		—
Derivative instruments with negative fair value, net of cash collateral	554,900		554,900		16		554,884		—

Because no market exists for certain of these financial instruments and management does not intend to sell these financial instruments, the fair values shown in the tables above may not represent values at which the respective financial instruments could be sold individually or in the aggregate at the given reporting date.

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Subsequent Events	9 Months Ended
	Sep. 30, 2023
Subsequent Events [Abstract]
Subsequent Events [Text Block]	Subsequent Events The Company evaluated events from the date of the consolidated financial statements on September 30, 2023 through the issuance of those consolidated financial statements included in this Quarterly Report on Form 10-Q. No events were identified requiring recognition in and/or disclosure in the consolidated financial statements.

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Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Pay vs Performance Disclosure
Net Income (Loss) Attributable to Parent	$ 134,495	$ 156,510	$ 448,171	$ 351,844

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Insider Trading Arrangements

3 Months Ended

Sep. 30, 2023

Trading Arrangements, by Individual

Material Terms of Trading Arrangement

No Company director or officer (as defined in Exchange Act Rule 16a-1(f)) has adopted, modified or terminated any trading arrangements during the third quarter of 2023.

Certain of our officers or directors have made elections to participate in, and are participating in, our dividend reinvestment plan and 401(k) plan, and have made, and may from time to time make, elections to have shares withheld to cover withholding taxes on issuances of shares to such officers or directors, which may be designed to satisfy the affirmative defense conditions of Rule 10b5-1 under the Exchange Act or may constitute non-Rule 10b5-1 trading arrangements (as defined in Item 408(c) of Regulation S-K).

Rule 10b5-1 Arrangement Adopted

false

Non-Rule 10b5-1 Arrangement Adopted

false

Rule 10b5-1 Arrangement Terminated

false

Non-Rule 10b5-1 Arrangement Terminated

false

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Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2023

Accounting Policies [Abstract]

Basis of Accounting, Policy [Policy Text Block]

The accompanying unaudited consolidated financial statements of BOK Financial Corporation ("BOK Financial" or "the Company") have been prepared in accordance with accounting principles for interim financial information generally accepted in the United States and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included.

Principles of Consolidation [Policy Text Block]

The unaudited consolidated financial statements include accounts of BOK Financial and its subsidiaries, principally BOKF, NA ("the Bank"), BOK Financial Securities, Inc., and BOK Financial Private Wealth, Inc. Operating divisions of the Bank include Bank of Albuquerque, Bank of Oklahoma, Bank of Texas, BOK Financial in Arizona, Arkansas, Colorado and Kansas/Missouri, BOK Financial Mortgage and the TransFund electronic funds network.

Reclassification, Policy [Policy Text Block]

Certain reclassifications have been made to conform to the current period presentation.

Newly Adopted and Pending Accounting Policies [Policy Text Block]

Newly Adopted and Pending Accounting Policies

Financial Accounting Standards Board ("FASB")

FASB Accounting Standards Update No. 2022-02, Financial Instruments - Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures ("ASU 2022-02")

On March 31, 2022, the FASB issued ASU 2022-02 which eliminates the accounting guidance on troubled debt restructurings ("TDRs") for creditors in ASC 310-40, while also no longer requiring an entity to consider renewals, modifications, and extensions that result from reasonably expected TDRs in their calculation of the allowance for credit losses. For receivables for which there has been a modification in their contractual cash flows, ASU 2022-02 requires disclosure, by class of financing receivable, of the types of modifications, the financial effects of those modifications, and the performance of these modified receivables, along with receivables that had a payment default during the current period and had modifications to the contractual cash flows within 12 months prior to the default. Further, ASU 2022-02 requires entities to disclose gross write-offs recorded in the current period by year of origination in the vintage disclosures on a year-to-date basis. ASU 2022-02 was effective for the Company January 1, 2023. Amendments related to TDR recognition and measurement and vintage disclosures were applied prospectively and are included in Note 4 to the consolidated financial statements. Adoption of this standard did not have a material effect on the Company's financial condition or results of operations.

FASB Accounting Standards Update No. 2023-01, Leases (Topic 842): Common Control Arrangements ("ASU 2023-01")

On March 27, 2023, the FASB issued ASU 2023-01 which, in part, amends the accounting for leasehold improvement in common-control arrangements. Under previous guidance, a lessee is generally required to amortize leasehold improvements that it owns over the shorter of the useful life of those improvements or the lease term. However, due to the nature of leasehold improvements made under leases between entities under common control, ASU 2023-01 requires a lessee in a common-control arrangement to amortize such leasehold improvements that it owns over the improvements' useful life to the common control group, regardless of the lease term. ASU 2023-01 is effective for fiscal years beginning after December 15, 2023, including interim periods within those fiscal years. Adoption of ASU 2023-01 is not expected to have a material impact on the Company's financial statements.

FASB Accounting Standards Update No. 2023-02, Investments - Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method ("ASU 2023-02")On March 29, 2023, the FASB issued ASU 2023-02 which amends previous guidance to allow entities to account for qualifying tax equity investments using the proportional amortization method regardless of the program giving rise to the related income tax credits, as opposed to only being allowed to apply this method to qualifying tax equity investments in low-income housing tax credit structures as was the case under previous guidance. ASU 2023-02 is effective for fiscal years beginning after December 15, 2023, including interim periods within those fiscal years. On June 30, 2023, the Company early adopted ASU 2023-02 as of January 1, 2023 using the modified retrospective approach, which did not have a material impact on the Company's financial statements. The Company transitioned from the equity method of accounting and began applying the proportional amortization method of accounting to its qualifying new markets tax credit and historic tax credit investments in addition to its low income housing tax credit partnerships already subject to the proportional amortization method.

Derivatives, Policy [Policy Text Block]

Derivative instruments may be used by the Company as part of its internal risk management programs or may be offered to customers. All derivative instruments are carried at fair value, and changes in fair value are reported in earnings as they occur. Credit risk is also considered in determining fair value. Deterioration in the credit rating of customer or other counterparties reduce the fair value of asset contracts. Deterioration of our credit rating could decrease the fair value of our derivative liabilities.

When bilateral netting agreements or similar arrangements exist between the Company and its counterparties that create a single legal claim or obligation to pay or receive the net amount in settlement of the individual derivative contracts, the Company reports derivative assets and liabilities on a net by derivative contract type by counterparty basis.

Derivative contracts may require the Company to provide or receive cash margin as collateral for derivative assets and liabilities. Derivative assets and liabilities are reported net of cash margin when certain conditions are met. In addition, derivative contracts executed with customers under Customer Risk Management Programs may be secured by non-cash collateral in conjunction with a credit agreement with that customer. Access to collateral in the event of default is reasonably assured.

None of these derivative contracts have been designated as hedging instruments for accounting purposes.

Customer Risk Management Programs

BOK Financial offers programs to permit its customers to manage various risks, including fluctuations in energy, cattle and other agricultural products, interest rates and foreign exchange rates with derivative contracts. Customers may also manage interest rate risk through interest rate swaps used by borrowers to modify interest rate terms of their loans. Derivative contracts are executed between the customers and BOK Financial. Offsetting contracts are executed between BOK Financial and other selected counterparties to minimize the risk of changes in commodity prices, interest rates or foreign exchange rates. The counterparty contracts are identical to customer contracts, except for a fixed pricing spread or fee paid to BOK Financial as profit and compensation for administrative costs and credit risk which is recognized over the life of the contracts and included in Other operating revenue – Brokerage and trading revenue in the Consolidated Statements of Earnings.

Trading

BOK Financial may offer derivative instruments such as to-be-announced securities to mortgage banking customers to enable them to manage their market risk or to mitigate the Company's market risk of holding trading securities. Changes in the fair value of derivative instruments for trading purposes or used to mitigate the market risk of holding trading securities are included in Other operating revenue – Brokerage and trading revenue.

Internal Risk Management Programs

BOK Financial may use derivative contracts in managing its interest rate sensitivity, as part of its economic hedge of the change in the fair value of mortgage servicing rights. Changes in the fair value of derivative instruments used in managing interest rate sensitivity and as part of the economic hedge of changes in the fair value of mortgage servicing rights are included in Other operating revenue – Gain (loss) on derivatives, net in the Consolidated Statements of Earnings.

As discussed in Note 5, certain derivative contracts not designated as hedging instruments related to mortgage loan commitments and forward sales contracts are included in Residential mortgage loans held for sale on the Consolidated Balance Sheets. See Note 5 for additional discussion of notional, fair value and impact on earnings of these contracts.

Loans and Allowances for Credit Losses, Loans [Policy Text Block]

Loans

Loans are either secured or unsecured based on the type of loan and the financial condition of the borrower. Repayment is generally expected from cash flow or proceeds from the sale of selected assets of the borrower. BOK Financial is exposed to risk of loss on loans due to the borrower's difficulties, which may arise from any number of factors, including problems within the respective industry or local economic conditions. Access to collateral, in the event of borrower default, is reasonably assured through adherence to applicable lending laws and through sound lending standards and credit review procedures. Accounting policies for all loans, excluding residential mortgage loans guaranteed by U.S. government agencies, are as follows.

Interest is accrued at the applicable interest rate on the principal amount outstanding. Loans are placed on nonaccruing status when, in the opinion of management, full collection of principal or interest is uncertain. Internally risk graded loans are individually evaluated for nonaccruing status quarterly. Non-risk graded loans are generally placed on nonaccruing status when more than 90 days past due or within 60 days of being notified of the borrower's bankruptcy filing. Interest previously accrued but not collected is charged against interest income when the loan is placed on nonaccruing status. Accrued but not paid interest receivable is included in Receivables in the Consolidated Balance Sheets. Payments on nonaccruing loans are applied to principal or recognized as interest income, according to management's judgment as to the collectability of principal. Loans may be returned to accruing status when, in the opinion of management, full collection of principal and interest, including principal previously charged off, is probable based on improvements in the borrower's financial condition or a sustained period of performance.

For loans acquired with no evidence of credit deterioration, discounts are accreted on either an individual basis for loans with unique characteristics or on a pool basis for groups of homogeneous loans. Accretion is discontinued when a loan with an individually attributed discount is placed on nonaccruing status.

Modifications of loans to existing borrowers generally consist of interest rate reductions, extension of payment terms, or a combination of these. Modifications may arise either voluntarily through negotiations with the borrower or involuntarily through court order. Payment deferrals up to six months are generally considered to be short-term modifications. Generally, principal and accrued but unpaid interest is not voluntarily forgiven. A change to the allowance for credit losses is generally not recorded upon modification because the effect of most modifications made to borrowers experiencing financial difficulty is already included in the allowance methodology.

Performing loans may be renewed under the current collateral value, debt service ratio and other underwriting standards. Nonaccruing loans may be renewed and will remain classified as nonaccruing. 

Occasionally, loans, other than residential mortgage loans, may be held for sale in order to manage credit concentration. These loans are carried at the lower of cost or fair value with gains or losses recognized in Other gains (losses), net in the Consolidated Statements of Earnings.

All loans are charged off when the loan balance or a portion of the loan balance is no longer supported by the paying capacity of the borrower or when the required cash flow is reduced in a modification. The charge-off amount is determined through a quarterly evaluation of available cash resources and collateral values. Internally risk graded loans are evaluated quarterly, and charge-offs are taken in the quarter in which the loss is identified. Non-risk graded loans that are past due between 60 days and 180 days, based on the loan product type, are charged off. Loans to borrowers whose personal obligation has been discharged through Chapter 7 bankruptcy proceedings are charged off within 60 days of notice of the bankruptcy filing, regardless of payment status.

Loan origination and commitment fees and direct loan acquisition and origination costs are deferred and amortized as an adjustment to yield over the life of the loan or over the commitment period, as applicable. Amortization does not anticipate loan prepayments. Net unamortized fees are recognized in full at time of payoff.

Qualifying residential mortgage loans guaranteed by U.S. government agencies have been sold into GNMA pools. Under certain performance conditions specified in government programs, the Company may have the right, but not the obligation to repurchase loans from GNMA pools. These loans no longer qualify for sale accounting and are recognized in the Consolidated Balance Sheets. We do not expect to receive all principal and interest based on the loan's contractual terms. A portion of the principal balance continues to be guaranteed; however, interest accrues at a curtailed rate as specified in the programs. The carrying value of these loans is reduced based on an estimate of the expected cash flows discounted at the original note rate plus a liquidity spread. Guaranteed loans may be modified in accordance with U.S. government agency guidelines. Interest continues to accrue based on the modified rate. Guaranteed loans may either be resold into GNMA pools after a performance period specified by the programs or foreclosed and conveyed to the guarantors.

Loans are disaggregated into portfolio segments and further disaggregated into classes. The portfolio segment is the level at which the Company develops and documents a systematic method for determining its allowance for credit losses. Classes are a further disaggregation of portfolio segments based on the risk characteristics of the loans and the Company's method for monitoring and assessing credit risk.

Loans and Allowances for Credit Losses, Allowances for Credit Losses [Policy Text Block]

Allowances for Credit Losses and Accrual for Off-balance Sheet Credit Risk from Unfunded Loans Commitments

The allowance for loan losses and accrual for off-balance sheet credit risk from unfunded loan commitments represent the portion of the amortized cost basis of loans that we do not expect to collect over the asset's contractual life, considering past events, current conditions, and reasonable and supportable forecasts of future economic conditions. The appropriateness of the allowance for credit losses, including industry and product adjustments, is assessed quarterly by a senior management Allowance Committee. This review is based on an ongoing evaluation of the estimated expected credit losses in the portfolio and on unused commitments to provide financing. A well-documented methodology has been developed and is applied by an independent Credit Administration department to assure consistency across the Company.

The allowance for loan losses consists of specific allowances attributed to certain individual loans, generally nonaccruing loans, with dissimilar risk characteristics that have not yet been charged down to amounts we expect to recover and general allowances for estimated credit losses on pools of loans that share similar risk characteristics.

When full collection of principal or interest is uncertain, the loan's risk characteristics have changed, and we exclude the loan from the general allowance pool, typically designating it as nonaccruing. For these loans, a specific allowance reflects the expected credit loss.

We measure specific allowances for loans excluded from the general allowance pool by an evaluation of estimated future cash flows discounted at the loan's initial effective interest rate or the fair value of collateral for certain collateral dependent loans. For a non-collateral dependent loan, the specific allowance is the amount by which the loan's amortized cost basis exceeds its net realizable value. We measure the specific allowance for collateral dependent loans as the amount by which the loan's amortized cost basis exceeds its fair value. When repayment is expected to be provided substantially through the sale of collateral, we deduct estimated selling costs from the collateral's fair value. Generally, for real property held as collateral for loans, third-party appraisals that conform to Uniform Standards of Professional Appraisal Practice serve as the basis for the fair value of real property held as collateral. These appraised values are on an "as-is" basis and generally are not adjusted by the Company. We obtain updated appraisals at least annually or more frequently if market conditions indicate collateral values may have declined. For energy loans, our internal staff of engineers generally determines collateral value of mineral rights based on projected cash flows from proven oil and gas reserves under existing economic and operating conditions. For real property held as collateral for other loans, third-party appraisals that conform to Uniform Standards of Professional Appraisal Practice generally serve as the basis for the fair value. These appraised values are on an "as-is" basis and generally are not adjusted by the Company. We obtain updated appraisals at least annually or more frequently if market conditions indicate collateral values may have declined. Our special assets staff generally determines the value of other collateral based on projected liquidation cash flows under current market conditions. We evaluate collateral values and available cash resources quarterly. Historical statistics may be used to estimate specific allowances in limited situations, such as when a collateral dependent loan is removed from the general allowance pool near the end of a reporting period until an appraisal of collateral value is received or a full assessment of future cash flows is completed.

General allowances estimate expected credit losses on pools of loans sharing similar risk characteristics that are expected to occur over the loan's estimated remaining life. The loan's estimated remaining life represents the contractual term adjusted for amortization, estimates of prepayments, and borrower-owned extension options. Approximately 90 percent of the committed dollars in the loan portfolio is risk graded loans with general allowance model inputs that include probability of default, loss given default, and exposure at default. Probability of default is based on the migration of loans from performing to nonperforming using historical life of loan analysis periods. Loss given default is based on the aggregate losses incurred, net of estimated recoveries. Exposure at default represents an estimate of the outstanding amount of credit exposure at the time a default may occur.

Charge-off migration is used to calculate the general allowance for the majority of non-risk graded loans to individuals. The expected credit loss on less than 10 percent of the committed dollars in the portfolio is calculated using charge-off migration.

The expected credit loss on approximately 1 percent of the committed dollars in the portfolio is calculated using a non-modeled approach. Specifically, the calculation applies a long-term net charge-off rate to the loan balances, adjusted for the weighted average remaining maturity of each portfolio.

In estimating the expected credit losses for general allowances on performing risk-graded loans, each portfolio class is assigned relevant economic loss drivers which best explain variations in portfolio net loss rates. The probability of default estimates for each portfolio class are adjusted for current and forecasted economic conditions. The result is applied to the exposure at default and loss given default to calculate the lifetime expected credit loss estimate. Selection of relevant economic loss drivers is re-evaluated periodically and involves statistical analysis as well as management judgment. The unemployment rate factors significantly in the allowance for loan losses calculation, affecting commercial and loans to individuals segments. Other primary factors impacting the commercial portfolio include BBB corporate spreads, real gross domestic product growth rate, and energy commodity prices. The primary commercial real estate variables are vacancy rate and BBB corporate spreads. In addition to the unemployment rate, the forecast for loans to individuals is tied to a home price index. The forecasts may include regional economic factors when localized conditions diverge from national conditions.

An Economic Forecast Committee, consisting of senior management with members largely independent of the allowance process develops a twelve-month forward-looking forecast for the relevant economic loss drivers. Management develops these forecasts based on external data as well as a view of future economic conditions which may include adjustments for regional conditions. The forecast includes three economic scenarios and probability weights for each scenario. The base forecast represents management's view of the most likely outcome, while the downside forecast reflects reasonably possible worsening economic conditions, and the upside forecast projects reasonably possible improving conditions.

At the end of the one-year reasonable and supportable forecast period, we transition from shorter-term expected losses to long-term loss averages for the loan's estimated remaining life. The difference between short-term loss forecasts and long-term loss averages is run-off over the reversion horizon, up to three years, depending on the forecasted economic scenarios.

General allowances also consider the estimated impact of factors that are not captured in the modeled results or historical experience. These factors may increase or decrease modeled results by amounts determined by the Allowance Committee. Factors not captured in modeled results or historical experience may include for example, new lines of business, market conditions that have not been previously encountered, observed changes in credit risk that are not yet reflected in macro-economic factors, or economic conditions that impact loss given default assumptions.

The accrual for off-balance sheet credit risk is maintained at a level that is appropriate to cover estimated losses associated with credit instruments that are not currently recognized as assets such as loan commitments, standby letters of credit or guarantees that are not unconditionally cancelable by the bank. This accrual is included in other liabilities in the Consolidated Balance Sheets. The appropriateness of the accrual is determined in the same manner as the allowance for loan losses, with the added consideration of commitment usage over the remaining life for those loans that the bank can not unconditionally cancel.

A provision for credit losses is charged against or credited to earnings in amounts necessary to maintain an appropriate Allowance for Credit Losses. Recoveries of loans previously charged off are added to the allowance when received.

Revenue [Policy Text Block]

Fees and commissions revenue is generated through the sales of products, consisting primarily of financial instruments, and the performance of services for customers under contractual obligations. Revenue from providing services for customers is recognized at the time services are provided in an amount that reflects the consideration we expect to be entitled to for those services. Revenue is recognized based on the application of five steps:

•Identify the contract with a customer

•Identify the performance obligations in the contract

•Determine the transaction price

•Allocate the transaction price to the performance obligations in the contract

•Recognize revenue when (or as) the Company satisfies a performance obligation

For contracts with multiple performance obligations, individual performance obligations are accounted for separately if the customer can benefit from the good or service on its own or with other resources readily available to the customer, and the promise to transfer goods and services to the customer is separately identifiable in the contract. The transaction price is allocated to the performance obligations based on relative standalone selling prices.

Revenue is recognized on a gross basis whenever we have primary responsibility and risk in providing the services or products to our customers and have discretion in establishing the price for the services or products. Revenue is recognized on a net basis whenever we act as an agent for products or services of others.

Brokerage and trading revenue includes revenues from trading, customer hedging, retail brokerage and investment banking. Trading revenue includes net realized and unrealized gains primarily related to sales of securities to institutional customers and related derivative contracts. Customer hedging revenue includes realized and unrealized changes in the fair value of derivative contracts held for customer risk management programs including credit valuation adjustments, as necessary. We offer commodity, interest rate, foreign exchange and equity derivatives to our customers. These customer contracts are offset with contracts with selected counterparties and exchanges to minimize changes in market risk from changes in commodity prices, interest rates or foreign exchange rates. Retail brokerage revenue represents fees and commissions earned on sales of fixed income securities, annuities, mutual funds and other financial instruments to retail customers. Investment banking revenue includes fees earned upon completion of underwriting and financial advisory services. Investment banking revenue also includes fees earned in conjunction with loan syndications. Insurance brokerage revenues represents fees and commissions earned on placement of insurance products with carriers for property and casualty and health coverage.

Transaction card revenue includes merchant discount fees and electronic funds transfer network fees, net of interchange fees paid to card issuers and assessments paid to card networks. Merchant discount fees represent fees paid by customers for account management and electronic processing of card transactions. Merchant discount fees are recognized at the time the customer's transactions are processed or other services are performed. The Company also maintains the TransFund electronic funds transfer network for the benefit of its members, which includes the Bank. Electronic funds transfer fees are recognized as electronic transactions processed on behalf of its members. 

Fiduciary and asset management revenue includes fees from asset management, custody, recordkeeping, investment advisory and administration services. Revenue is recognized on an accrual basis at the time the services are performed and may be based on either the fair value of the account or the service provided.

Deposit service charges and fees include commercial account service charges, overdraft fees, check card fee revenue and automated service charge and other deposit service fees. Fees are recognized at least quarterly in accordance with published deposit account agreements and disclosure statements for retail accounts or contractual agreements for commercial accounts. Item charges for overdraft or non-sufficient funds items are recognized as items are presented for payment. Account balance charges and activity fees are accrued monthly and collected in arrears. Commercial account activity fees may be offset by an earnings credit based on account balances. Check card fees represent interchange fees paid by a merchant bank for transactions processed from cards issued by the Company. Check card fees are recognized when transactions are processed.

Mortgage banking revenue includes revenues recognized in conjunction with the origination, marketing and servicing of conventional and government-sponsored residential mortgage loans. Mortgage production revenue includes net realized gains (losses) on sales of residential mortgage loans in the secondary market and the net change in unrealized gains (losses) on residential mortgage loans held for sale. Mortgage production revenue also includes changes in the fair value of derivative contracts not designated as hedging instruments related to residential mortgage loan commitments and forward sales contracts. Mortgage servicing revenue includes servicing fee income and late charges on loans serviced for others.

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Derivative Instruments and Hedging Activities (Policies)

9 Months Ended

Sep. 30, 2023

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivatives, Policy [Policy Text Block]

Derivative instruments may be used by the Company as part of its internal risk management programs or may be offered to customers. All derivative instruments are carried at fair value, and changes in fair value are reported in earnings as they occur. Credit risk is also considered in determining fair value. Deterioration in the credit rating of customer or other counterparties reduce the fair value of asset contracts. Deterioration of our credit rating could decrease the fair value of our derivative liabilities.

When bilateral netting agreements or similar arrangements exist between the Company and its counterparties that create a single legal claim or obligation to pay or receive the net amount in settlement of the individual derivative contracts, the Company reports derivative assets and liabilities on a net by derivative contract type by counterparty basis.

Derivative contracts may require the Company to provide or receive cash margin as collateral for derivative assets and liabilities. Derivative assets and liabilities are reported net of cash margin when certain conditions are met. In addition, derivative contracts executed with customers under Customer Risk Management Programs may be secured by non-cash collateral in conjunction with a credit agreement with that customer. Access to collateral in the event of default is reasonably assured.

None of these derivative contracts have been designated as hedging instruments for accounting purposes.

Customer Risk Management Programs

BOK Financial offers programs to permit its customers to manage various risks, including fluctuations in energy, cattle and other agricultural products, interest rates and foreign exchange rates with derivative contracts. Customers may also manage interest rate risk through interest rate swaps used by borrowers to modify interest rate terms of their loans. Derivative contracts are executed between the customers and BOK Financial. Offsetting contracts are executed between BOK Financial and other selected counterparties to minimize the risk of changes in commodity prices, interest rates or foreign exchange rates. The counterparty contracts are identical to customer contracts, except for a fixed pricing spread or fee paid to BOK Financial as profit and compensation for administrative costs and credit risk which is recognized over the life of the contracts and included in Other operating revenue – Brokerage and trading revenue in the Consolidated Statements of Earnings.

Trading

BOK Financial may offer derivative instruments such as to-be-announced securities to mortgage banking customers to enable them to manage their market risk or to mitigate the Company's market risk of holding trading securities. Changes in the fair value of derivative instruments for trading purposes or used to mitigate the market risk of holding trading securities are included in Other operating revenue – Brokerage and trading revenue.

Internal Risk Management Programs

BOK Financial may use derivative contracts in managing its interest rate sensitivity, as part of its economic hedge of the change in the fair value of mortgage servicing rights. Changes in the fair value of derivative instruments used in managing interest rate sensitivity and as part of the economic hedge of changes in the fair value of mortgage servicing rights are included in Other operating revenue – Gain (loss) on derivatives, net in the Consolidated Statements of Earnings.

As discussed in Note 5, certain derivative contracts not designated as hedging instruments related to mortgage loan commitments and forward sales contracts are included in Residential mortgage loans held for sale on the Consolidated Balance Sheets. See Note 5 for additional discussion of notional, fair value and impact on earnings of these contracts.

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Securities (Tables)

9 Months Ended

Sep. 30, 2023

Marketable Securities [Abstract]

Trading Securities, [Table Text Block]

The fair value and net unrealized gain (loss) included in trading securities are as follows (in thousands):

	September 30, 2023				December 31, 2022
	Fair Value		Net Unrealized Gain (Loss)		Fair Value		Net Unrealized Gain (Loss)
U.S. government securities	$	18,843	$	8	$	9,823	$	(16)
Residential agency mortgage-backed securities	4,653,161		(107,212)		4,406,848		4
Municipal securities	51,998		(1,175)		21,484		(136)
Other trading securities	24,099		120		26,006		(175)
Total trading securities	$	4,748,101	$	(108,259)	$	4,464,161	$	(323)

Investment Securities (Held-to-Maturity) [Table Text Block]

The amortized cost and fair values of investment securities are as follows (in thousands):

	September 30, 2023
	Amortized		Carrying		Fair		Gross Unrealized
	Cost		Value1		Value		Gain		Loss
Municipal securities	$	121,003	$	121,003	$	122,695	$	2,882	$	(1,190)
Mortgage-backed securities:
Residential agency	2,322,710		2,146,133		1,901,143		95		(245,085)
Commercial agency	17,258		15,838		14,371		—		(1,467)
Other debt securities	15,788		15,788		14,158		—		(1,630)
Total investment securities	2,476,759		2,298,762		2,052,367		2,977		(249,372)
Allowance for credit losses	(344)		(344)		—		—		—
Investment securities, net of allowance	$	2,476,415	$	2,298,418	$	2,052,367	$	2,977	$	(249,372)

1    Carrying value includes $178 million of net unrealized loss which remains in Accumulated other comprehensive income ("AOCI") in the Consolidated Balance Sheets related to certain securities transferred during the second quarter of 2022 from the Available for Sale securities portfolio to the Investment securities portfolio.

	December 31, 2022
	Amortized		Carrying		Fair		Gross Unrealized
	Cost		Value1		Value		Gain		Loss
Municipal securities	$	170,629	$	170,629	$	176,621	$	6,456	$	(464)
Mortgage-backed securities:
Residential agency	2,538,565		2,315,219		2,143,360		155		(172,014)
Commercial agency	17,259		15,609		14,588		—		(1,021)
Other debt securities	12,788		12,788		12,199		—		(589)
Total investment securities	2,739,241		2,514,245		2,346,768		6,611		(174,088)
Allowance for credit losses	(558)		(558)		—		—		—
Investment securities, net of allowance	$	2,738,683	$	2,513,687	$	2,346,768	$	6,611	$	(174,088)

1    Carrying value includes $225 million of net unrealized loss which remains in AOCI in the Consolidated Balance Sheets related to certain securities transferred during the second quarter of 2022 from the Available for Sale securities portfolio to the Investment securities portfolio.

The amortized cost and fair values of investment securities at September 30, 2023, by contractual maturity, are as shown in the following table (dollars in thousands):

	Less than One Year		One to Five Years		Six to Ten Years		Over Ten Years		Total		Weighted Average Maturity1
Fixed maturity debt securities:
Carrying value	$	17,756	$	100,534	$	34,326	$	13	$	152,629	3.53
Fair value	17,804		102,168		31,239		13		151,224
Residential mortgage-backed securities:
Carrying value									$	2,146,133	2
Fair value									1,901,143
Total investment securities:
Carrying value									$	2,298,762
Fair value									2,052,367

1Expected maturities may differ from contractual maturities, because borrowers may have the right to call or prepay obligations with or without penalty.

2The average expected lives of residential mortgage-backed securities were 5.3 years based upon current prepayment assumptions.

Temporarily Impaired Investment Securities

(dollars in thousands):

	September 30, 2023
	Number of Securities	Less Than 12 Months				12 Months or Longer				Total
		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Investment:
Municipal securities	59	$	28,962	$	601	$	6,200	$	589	$	35,162	$	1,190
Mortgage-backed securities:
Residential agency	116	—		—		1,900,066		245,085		1,900,066		245,085
Commercial agency	2	—		—		14,371		1,467		14,371		1,467
Other debt securities	3	—		—		8,645		1,630		8,645		1,630
Total investment securities	180	$	28,962	$	601	$	1,929,282	$	248,771	$	1,958,244	$	249,372

	December 31, 2022
	Number of Securities	Less Than 12 Months				12 Months or Longer				Total
		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Investment:
Municipal securities	22	$	18,037	$	406	$	544	$	58	$	18,581	$	464
Mortgage-backed securities:
Residential agency	116	2,142,114		172,014		—		—		2,142,114		172,014
Commercial agency	2	14,588		1,021		—		—		14,588		1,021
Other debt securities	3	9,428		571		257		18		9,685		589
Total investment securities	143	$	2,184,167	$	174,012	$	801	$	76	$	2,184,968	$	174,088

Available For Sale Securities [Table Text Block]

The amortized cost and fair value of available for sale securities are as follows (in thousands):

	September 30, 2023
	Amortized		Fair		Gross Unrealized
	Cost		Value		Gain		Loss
U.S. Treasury	$	1,000	$	897	$	—	$	(103)
Municipal securities	545,940		488,269		—		(57,671)
Mortgage-backed securities:
Residential agency	6,686,602		6,216,955		162		(469,809)
Residential non-agency	774,074		715,806		9,830		(68,098)
Commercial agency	4,933,051		4,484,247		37		(448,841)
Other debt securities	500		473		—		(27)
Total available for sale securities	$	12,941,167	$	11,906,647	$	10,029	$	(1,044,549)

	December 31, 2022
	Amortized		Fair		Gross Unrealized
	Cost		Value		Gain		Loss
U.S. Treasury	$	1,000	$	898	$	—	$	(102)
Municipal securities	687,875		624,500		321		(63,696)
Mortgage-backed securities:
Residential agency	6,161,358		5,814,496		13,085		(359,947)
Residential non-agency	616,423		577,576		11,776		(50,623)
Commercial agency	4,892,257		4,475,917		3,479		(419,819)
Other debt securities	500		473		—		(27)
Total available for sale securities	$	12,359,413	$	11,493,860	$	28,661	$	(894,214)

The amortized cost and fair values of available for sale securities at September 30, 2023, by contractual maturity, are as shown in the following table (dollars in thousands):

	Less than One Year		One to Five Years		Six to Ten Years		Over Ten Years		Total		Weighted Average Maturity1
Fixed maturity debt securities:
Amortized cost	$	347,874	$	3,048,923	$	1,554,983	$	528,711	$	5,480,491	5.58
Fair value	341,476		2,759,574		1,382,272		490,564		4,973,886
Residential mortgage-backed securities:
Amortized cost									$	7,460,676	2
Fair value									6,932,761
Total available for sale securities:
Amortized cost									$	12,941,167
Fair value									11,906,647

1Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without penalty.

2The average expected lives of residential mortgage-backed securities were 4.4 years based upon current prepayment assumptions.

Sales of available for sale securities resulted in gains and losses as follows (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Proceeds	$	—	$	30,834	$	135,489	$	242,135
Gross realized gains	—		1,116		703		4,510
Gross realized losses	—		(224)		(3,713)		(1,493)
Related federal and state income tax expense (benefit)	—		209		(708)		706

Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value [Table Text Block]

	September 30, 2023
	Number of Securities	Less Than 12 Months				12 Months or Longer				Total
		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Available for sale:
U.S. Treasury	1	$	—	$	—	$	897	$	103	$	897	$	103
Municipal securities	191	7,688		606		480,582		57,065		488,270		57,671
Mortgage-backed securities:
Residential agency	752	2,276,744		55,455		3,879,833		414,354		6,156,577		469,809
Residential non-agency	39	269,254		7,317		431,379		60,781		700,633		68,098
Commercial agency	302	821,238		20,920		3,622,841		427,921		4,444,079		448,841
Other debt securities	1	—		—		473		27		473		27
Total available for sale securities	1,286	$	3,374,924	$	84,298	$	8,416,005	$	960,251	$	11,790,929	$	1,044,549

	December 31, 2022
	Number of Securities	Less Than 12 Months				12 Months or Longer				Total
		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Available for sale:
U.S. Treasury	1	$	—	$	—	$	899	$	102	$	899	$	102
Municipal securities	227	146,634		5,301		428,248		58,395		574,882		63,696
Mortgage-backed securities:
Residential agency	613	3,879,582		256,973		863,732		102,974		4,743,314		359,947
Residential non-agency	26	499,716		50,623		—		—		499,716		50,623
Commercial agency	285	1,647,778		63,701		2,535,816		356,118		4,183,594		419,819
Other debt securities	1	—		—		473		27		473		27
Total available for sale securities	1,153	$	6,173,710	$	376,598	$	3,829,168	$	517,616	$	10,002,878	$	894,214

Fair Value Option Securities [Table Text Block]

The fair value and net unrealized gain (loss) included in fair value option securities is as follows (in thousands):

	September 30, 2023		December 31, 2022
	Fair Value	Net Unrealized Gain (Loss)	Fair Value	Net Unrealized Gain (Loss)
Residential agency mortgage-backed securities	20,215	(2,436)	296,590	338

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Derivatives (Tables)

9 Months Ended

Sep. 30, 2023

Derivative Instrument Detail [Abstract]

Derivative Contracts [Table Text Block]

The following table summarizes the fair values of derivative contracts recorded as "derivative contracts" assets and liabilities in the balance sheet at September 30, 2023 (in thousands):

	Assets
	Notional1		Gross Fair Value		Netting Adjustments		Net Fair Value Before Cash Collateral		Cash Collateral		Fair Value Net of Cash Collateral
Customer risk management programs:
Interest rate contracts	$	2,763,185	$	160,856	$	—	$	160,856	$	(160,548)	$	308
Energy contracts	8,617,592		972,109		(607,483)		364,626		(34,399)		330,227
Foreign exchange contracts	70,676		68,262		—		68,262		(2,086)		66,176
Equity option contracts	5,524		47		—		47		(47)		—
Total customer risk management programs	11,456,977		1,201,274		(607,483)		593,791		(197,080)		396,711
Trading	24,569,954		234,809		(85,411)		149,398		—		149,398
Internal risk management programs	—		—		—		—		—		—
Total derivative contracts	$	36,026,931	$	1,436,083	$	(692,894)	$	743,189	$	(197,080)	$	546,109
	Liabilities
	Notional1		Gross Fair Value		Netting Adjustments		Net Fair Value Before Cash Collateral		Cash Collateral		Fair Value Net of Cash Collateral
Customer risk management programs:
Interest rate contracts	$	2,763,185	$	160,869	$	—	$	160,869	$	—	$	160,869
Energy contracts	8,941,634		966,583		(607,483)		359,100		(242,133)		116,967
Foreign exchange contracts	64,921		62,306		—		62,306		—		62,306
Equity option contracts	5,524		47		—		47		—		47
Total customer risk management programs	11,775,264		1,189,805		(607,483)		582,322		(242,133)		340,189
Trading	18,778,554		150,983		(85,412)		65,571		(6,138)		59,433
Internal risk management programs	295,000		4,325		—		4,325		—		4,325
Total derivative contracts	$	30,848,818	$	1,345,113	$	(692,895)	$	652,218	$	(248,271)	$	403,947

1    Notional amounts for commodity contracts are converted into dollar-equivalent amounts based on dollar prices at the inception of the contract.

The following table summarizes the fair values of derivative contracts recorded as "derivative contracts" assets and liabilities in the balance sheet at December 31, 2022 (in thousands):

	Assets
	Notional 1		Gross Fair Value		Netting Adjustments		Net Fair Value Before Cash Collateral		Cash Collateral		Fair Value Net of Cash Collateral
Customer risk management programs:
Interest rate contracts	$	2,629,318	$	158,825	$	—	$	158,825	$	(114,955)	$	43,870
Energy contracts	7,918,020		1,232,283		(594,543)		637,740		(67,024)		570,716
Foreign exchange contracts	219,791		216,569		—		216,569		—		216,569
Equity option contracts	21,102		193		—		193		(109)		84
Total customer risk management programs	10,788,231		1,607,870		(594,543)		1,013,327		(182,088)		831,239
Trading	17,400,037		126,910		(74,647)		52,263		(4,646)		47,617
Internal risk management programs	85,000		1,500		(13)		1,487		—		1,487
Total derivative contracts	$	28,273,268	$	1,736,280	$	(669,203)	$	1,067,077	$	(186,734)	$	880,343
	Liabilities
	Notional 1		Gross Fair Value		Netting Adjustments		Net Fair Value Before Cash Collateral		Cash Collateral		Fair Value Net of Cash Collateral
Customer risk management programs:
Interest rate contracts	$	2,629,122	$	158,816	$	—	$	158,816	$	—	$	158,816
Energy contracts	8,696,060		1,242,058		(594,543)		647,515		(484,319)		163,196
Foreign exchange contracts	214,855		211,233		—		211,233		(7)		211,226
Equity option contracts	21,102		193		—		193		—		193
Total customer risk management programs	11,561,139		1,612,300		(594,543)		1,017,757		(484,326)		533,431
Trading	14,038,906		94,958		(74,647)		20,311		(423)		19,888
Internal risk management programs	178,806		1,594		(13)		1,581		—		1,581
Total derivative contracts	$	25,778,851	$	1,708,852	$	(669,203)	$	1,039,649	$	(484,749)	$	554,900

1    Notional amounts for commodity contracts are converted into dollar-equivalent amounts based on dollar prices at the inception of the contract.

Derivative Instruments, Gain (Loss) in Statement of Earnings [Table Text Block]

The following summarizes the pre-tax net gains (losses) on derivative instruments and where they are recorded in the income statement (in thousands):

	Three Months Ended
	September 30, 2023				September 30, 2022
	Brokerage and Trading Revenue		Gain (Loss) on Derivatives, Net		Brokerage and Trading Revenue		Gain (Loss) on Derivatives, Net
Customer risk management programs:
Interest rate contracts	$	800	$	—	$	2,677	$	—
Energy contracts	5,994		—		10,386		—
Foreign exchange contracts	61		—		116		—
Equity option contracts	—		—		—		—
Total customer risk management programs	6,855		—		13,179		—
Trading1	21,511		—		52,373		—
Internal risk management programs	—		(9,010)		—		(17,009)
Total derivative contracts	$	28,366	$	(9,010)	$	65,552	$	(17,009)

1    Represents changes in fair value of to-be-announced securities and other derivative instruments held to mitigate market risk of trading securities portfolio, which is offset by changes in fair value of trading securities also included in Brokerage and Trading Revenue in the Consolidated Statements of Earnings.

	Nine Months Ended
	September 30, 2023				September 30, 2022
	Brokerage and Trading Revenue		Gain (Loss) on Derivatives, Net		Brokerage and Trading Revenue		Gain (Loss) on Derivatives, Net
Customer risk management programs:
Interest rate contracts	4,909		—		9,958		—
Energy contracts	23,797		—		26,870		—
Foreign exchange contracts	145		—		422		—
Equity option contracts	—		—		—		—
Total customer risk management programs	28,851		—		37,250		—
Trading1	22,590		—		68,071		—
Internal risk management programs	—		(18,513)		—		(77,559)
Total derivative contracts	$	51,441	$	(18,513)	$	105,321	$	(77,559)

1    Represents changes in fair value of to-be-announced securities and other derivative instruments held to mitigate market risk of trading securities portfolio, which is offset by changes in fair value of trading securities also included in Brokerage and Trading Revenue in the Consolidated Statements of Earnings.

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Loans and Allowances for Credit Losses (Tables)

9 Months Ended

Sep. 30, 2023

Loans and Leases Receivable, Net Amount [Abstract]

Schedule of Loans by Portfolio Segment [Table Text Block]

Portfolio segments of the loan portfolio are as follows (in thousands):

	September 30, 2023								December 31, 2022
	Fixed Rate		Variable Rate		Non-accrual		Total		Fixed Rate		Variable Rate		Non-accrual		Total
Commercial	$	3,536,353	$	11,112,788	$	70,698	$	14,719,839	$	3,392,422	$	10,759,780	$	60,297	$	14,212,499
Commercial real estate	848,042		4,385,840		7,418		5,241,300		874,716		3,715,491		16,570		4,606,777
Loans to individuals	2,229,750		1,491,660		41,469		3,762,879		2,099,165		1,593,779		44,930		3,737,874
Total	$	6,614,145	$	16,990,288	$	119,585	$	23,724,018	$	6,366,303	$	16,069,050	$	121,797	$	22,557,150

Rollforward of Allowance For Loan Losses And Accrual for Off-Balance Sheet Credit Losses [Table Text Block]

The activity in the allowance for loan losses and the allowance for off-balance sheet credit losses related to loan commitments and standby letters of credit is summarized as follows (in thousands):

	Three Months Ended
	September 30, 2023
	Commercial		Commercial Real Estate		Loans to Individuals		Total
Allowance for loan losses:
Beginning balance	$	143,269	$	76,347	$	43,098	$	262,714
Provision for loan losses	1,158		11,152		3,621		15,931
Loans charged off	(6,769)		(2,238)		(1,586)		(10,593)
Recoveries of loans previously charged off	273		3,167		622		4,062
Ending balance	$	137,931	$	88,428	$	45,755	$	272,114
Allowance for off-balance sheet credit risk from unfunded loan commitments:
Beginning balance	$	20,294	$	37,681	$	1,965	$	59,940
Provision for off-balance sheet credit risk	(2,179)		(5,076)		(81)		(7,336)
Ending balance	$	18,115	$	32,605	$	1,884	$	52,604

	Nine Months Ended
	September 30, 2023
	Commercial		Commercial Real Estate		Loans to Individuals		Total
Allowance for loan losses:
Beginning balance	$	131,586	$	57,648	$	46,470	$	235,704
Provision for loan losses	12,908		35,878		1,627		50,413
Loans charged off	(9,578)		(8,446)		(4,285)		(22,309)
Recoveries of loans previously charged off	3,015		3,348		1,943		8,306
Ending balance	$	137,931	$	88,428	$	45,755	$	272,114
Allowance for off-balance sheet credit risk from unfunded loan commitments:
Beginning balance	$	18,246	$	40,490	$	2,183	$	60,919
Provision for off-balance sheet credit risk	(131)		(7,885)		(299)		(8,315)
Ending balance	$	18,115	$	32,605	$	1,884	$	52,604

	Three Months Ended
	September 30, 2022
	Commercial		Commercial Real Estate		Loans to Individuals		Total
Allowance for loan losses:
Beginning balance	$	137,562	$	62,997	$	40,555	$	241,114
Provision for loan losses	3,158		(4,415)		2,368		1,111
Loans charged off	(75)		—		(1,691)		(1,766)
Recoveries of loans previously charged off	721		7		581		1,309
Ending balance	$	141,366	$	58,589	$	41,813	$	241,768
Allowance for off-balance sheet credit risk from unfunded loan commitments:
Beginning balance	$	15,839	$	24,670	$	1,741	$	42,250
Provision for off-balance sheet credit risk	939		12,826		295		14,060
Ending balance	$	16,778	$	37,496	$	2,036	$	56,310

	Nine Months Ended
	September 30, 2022
	Commercial		Commercial Real Estate		Loans to Individuals		Total
Allowance for loan losses:
Beginning balance	$	162,056	$	58,553	$	35,812	$	256,421
Provision for loan losses	(17,428)		138		8,276		(9,014)
Loans charged off	(6,162)		(269)		(4,508)		(10,939)
Recoveries of loans previously charged off	2,900		167		2,233		5,300
Ending balance	$	141,366	$	58,589	$	41,813	$	241,768
Allowance for off-balance sheet credit risk from unfunded loan commitments:
Beginning balance	$	13,812	$	17,442	$	1,723	$	32,977
Provision for off-balance sheet credit risk	2,966		20,054		313		23,333
Ending balance	$	16,778	$	37,496	$	2,036	$	56,310

A $7.0 million provision for credit losses was necessary for the third quarter of 2023, reflecting modest improvement in the economic outlook and the impact of forecasted higher energy prices during the forecast period, offset by loan growth and the impact of a more challenging national commercial real estate environment, particularly related to office.

The allowance for loan losses and recorded investment of the related loans by portfolio segment for each measurement method at September 30, 2023 is as follows (in thousands):

	Collectively Measured for General Allowances				Individually Measured for Specific Allowances				Total
	Recorded Investment		Related Allowance		Recorded Investment		Related Allowance		Recorded Investment		Related Allowance
Commercial	$	14,649,141	$	136,285	$	70,698	$	1,646	$	14,719,839	$	137,931
Commercial real estate	5,233,882		88,428		7,418		—		5,241,300		88,428
Loans to individuals	3,721,410		45,755		41,469		—		3,762,879		45,755
Total	$	23,604,433	$	270,468	$	119,585	$	1,646	$	23,724,018	$	272,114

The allowance for loan losses and recorded investment of the related loans by portfolio segment for each measurement method at December 31, 2022 is as follows (in thousands):

	Collectively Measured for General Allowances				Individually Measured for Specific Allowances				Total
	Recorded Investment		Related Allowance		Recorded Investment		Related Allowance		Recorded Investment		Related Allowance
Commercial	$	14,152,202	$	127,566	$	60,297	$	4,020	$	14,212,499	$	131,586
Commercial real estate	4,590,207		56,098		16,570		1,550		4,606,777		57,648
Loans to individuals	3,692,944		46,470		44,930		—		3,737,874		46,470
Total	$	22,435,353	$	230,134	$	121,797	$	5,570	$	22,557,150	$	235,704

Schedule of Credit Quality Indicators [Table Text Block]

The following table summarizes the Company’s loan portfolio at September 30, 2023 by the risk grade categories and vintage (in thousands): 

	Origination Year
	2023		2022		2021		2020		2019		Prior		Revolving Loans		Revolving Loans Converted to Term Loans		Total
Commercial:
Energy
Pass	$	192,614	$	106,593	$	45,795	$	8,190	$	10,463	$	12,518	$	3,064,120	$	—	$	3,440,293
Special Mention	—		—		—		—		—		—		13,950		—		13,950
Accruing Substandard	—		—		—		—		—		—		16,800		—		16,800
Nonaccrual	—		—		—		—		—		108		19,451		—		19,559
Total energy	192,614		106,593		45,795		8,190		10,463		12,626		3,114,321		—		3,490,602
Loans charged-off, year-to-date	—		—		—		—		—		—		—		—		—
Healthcare
Pass	485,617		903,150		573,317		464,170		338,944		947,581		268,806		16		3,981,601
Special Mention	—		—		18,719		—		2,421		18,072		980		—		40,192
Accruing Substandard	—		589		214		6,957		—		10,046		1,700		—		19,506
Nonaccrual	—		—		—		—		25,797		10,525		5,513		—		41,835
Total healthcare	485,617		903,739		592,250		471,127		367,162		986,224		276,999		16		4,083,134
Loans charged-off, year-to-date	—		—		—		—		—		—		—		—		—
Services
Pass	707,494		541,539		412,450		247,092		131,269		723,365		759,327		870		3,523,406
Special Mention	—		13,051		1,836		1,531		596		2,733		1,421		—		21,168
Accruing Substandard	—		5,752		730		1,716		2,333		3,446		4,957		33		18,967
Nonaccrual	—		—		2,161		337		—		—		322		—		2,820
Total services	707,494		560,342		417,177		250,676		134,198		729,544		766,027		903		3,566,361
Loans charged-off, year-to-date	—		—		3,360		—		—		—		1,577		—		4,937
General business
Pass	667,802		504,364		262,660		148,645		140,220		319,113		1,396,919		2,196		3,441,919
Special Mention	9,277		15,059		9,103		1,115		287		8,389		7,959		—		51,189
Accruing Substandard	3,956		37,025		1,440		37		—		—		37,693		—		80,151
Nonaccrual	—		—		—		—		—		54		6,385		44		6,483
Total general business	681,035		556,448		273,203		149,797		140,507		327,556		1,448,956		2,240		3,579,742
Loans charged-off, year-to-date	—		—		4,598		2		—		17		14		10		4,641
Total commercial	2,066,760		2,127,122		1,328,425		879,790		652,330		2,055,950		5,606,303		3,159		14,719,839
Commercial real estate:
Pass	361,934		1,730,828		1,211,694		480,710		555,902		723,783		139,721		—		5,204,572
Special Mention	—		—		—		—		—		19,212		—		—		19,212
Accruing Substandard	—		—		79		—		—		10,019		—		—		10,098
Nonaccrual	—		—		—		—		7,263		155		—		—		7,418
Total commercial real estate	361,934		1,730,828		1,211,773		480,710		563,165		753,169		139,721		—		5,241,300
Loans charged-off, year-to-date	—		—		—		—		—		8,446		—		—		8,446

	Origination Year
	2023		2022		2021		2020		2019		Prior		Revolving Loans		Revolving Loans Converted to Term Loans		Total
Loans to individuals:
Residential mortgage
Pass	320,680		332,368		348,782		354,284		57,944		252,027		366,136		22,277		2,054,498
Special Mention	—		359		262		1,339		—		152		3,144		88		5,344
Accruing Substandard	—		—		—		—		—		45		101		51		197
Nonaccrual	—		1,298		2,223		2,771		723		20,728		2,196		1,014		30,953
Total residential mortgage	320,680		334,025		351,267		358,394		58,667		272,952		371,577		23,430		2,090,992
Loans charged-off, year-to-date	—		—		51		4		—		14		1		—		70
Residential mortgage guaranteed by U.S. government agencies
Pass	—		1,624		2,030		4,749		6,752		135,502		—		—		150,657
Nonaccrual	—		—		—		280		376		9,779		—		—		10,435
Total residential mortgage guaranteed by U.S. government agencies	—		1,624		2,030		5,029		7,128		145,281		—		—		161,092
Personal:
Pass	161,514		227,726		167,566		137,761		133,304		158,721		523,513		195		1,510,300
Special Mention	100		30		103		22		2		—		—		—		257
Accruing Substandard	—		—		—		2		157		—		—		—		159
Nonaccrual	—		27		4		9		4		12		23		—		79
Total personal	161,614		227,783		167,673		137,794		133,467		158,733		523,536		195		1,510,795
Loans charged-off, year-to-date	—		60		40		41		—		4,042		26		6		4,215
Total loans to individuals	482,294		563,432		520,970		501,217		199,262		576,966		895,113		23,625		3,762,879
Total loans	$	2,910,988	$	4,421,382	$	3,061,168	$	1,861,717	$	1,414,757	$	3,386,085	$	6,641,137	$	26,784	$	23,724,018

The following table summarizes the Company's loan portfolio at December 31, 2022 by the risk grade categories and vintage (in thousands): 

	Origination Year
	2022		2021		2020		2019		2018		Prior		Revolving Loans		Revolving Loans Converted to Term Loans		Total
Commercial:
Energy
Pass	$	157,745	$	76,951	$	30,284	$	12,783	$	5,992	$	4,980	$	3,104,906	$	—	$	3,393,641
Accruing Substandard	—		—		—		664		385		683		28,018		—		29,750
Nonaccrual	—		—		—		—		—		159		1,240		—		1,399
Total energy	157,745		76,951		30,284		13,447		6,377		5,822		3,134,164		—		3,424,790
Healthcare
Pass	932,097		604,886		476,854		404,204		464,989		618,163		245,898		20		3,747,111
Special Mention	—		—		—		20,071		—		18,859		4		—		38,934
Accruing Substandard	—		—		—		—		—		14,304		3,634		—		17,938
Nonaccrual	—		—		—		26,480		6,373		8,181		—		—		41,034
Total healthcare	932,097		604,886		476,854		450,755		471,362		659,507		249,536		20		3,845,017
Services
Pass	821,785		496,510		286,085		193,481		156,736		696,300		722,371		639		3,373,907
Special Mention	502		5,139		989		771		894		1,345		8,668		—		18,308
Accruing Substandard	—		—		—		2,459		43		2,789		17,665		122		23,078
Nonaccrual	—		5,570		449		—		—		2,389		7,820		—		16,228
Total services	822,287		507,219		287,523		196,711		157,673		702,823		756,524		761		3,431,521
General business
Pass	725,894		361,839		198,274		172,878		139,140		283,694		1,570,536		2,329		3,454,584
Special Mention	17,759		13,065		208		71		7		2,291		7,094		26		40,521
Accruing Substandard	—		2,169		66		4,130		4,680		3,287		94		4		14,430
Nonaccrual	—		—		1,052		14		72		5		485		8		1,636
Total general business	743,653		377,073		199,600		177,093		143,899		289,277		1,578,209		2,367		3,511,171
Total commercial	2,655,782		1,566,129		994,261		838,006		779,311		1,657,429		5,718,433		3,148		14,212,499
Commercial real estate:
Pass	1,188,483		1,158,002		552,616		641,102		247,625		633,304		161,616		—		4,582,748
Accruing Substandard	—		—		—		7,459		—		—		—		—		7,459
Nonaccrual	—		—		—		—		—		16,570		—		—		16,570
Total commercial real estate	1,188,483		1,158,002		552,616		648,561		247,625		649,874		161,616		—		4,606,777

	Origination Year
	2022		2021		2020		2019		2018		Prior		Revolving Loans		Revolving Loans Converted to Term Loans		Total
Loans to individuals:
Residential mortgage
Pass	354,497		373,190		393,002		63,142		40,525		260,625		352,126		22,176		1,859,283
Special Mention	—		81		42		—		142		388		527		87		1,267
Accruing Substandard	—		—		187		—		—		138		117		1		443
Nonaccrual	32		1,656		2,717		362		1,904		20,139		2,216		765		29,791
Total residential mortgage	354,529		374,927		395,948		63,504		42,571		281,290		354,986		23,029		1,890,784
Residential mortgage guaranteed by U.S. government agencies
Pass	289		2,254		9,000		10,722		17,244		191,426		—		—		230,935
Nonaccrual	—		—		299		1,460		2,319		10,927		—		—		15,005
Total residential mortgage guaranteed by U.S. government agencies	289		2,254		9,299		12,182		19,563		202,353		—		—		245,940
Personal:
Pass	254,497		193,095		154,887		172,114		68,871		201,278		549,187		332		1,594,261
Special Mention	47		28		40		12		17		—		6,003		4		6,151
Accruing Substandard	—		444		—		160		—		—		—		—		604
Nonaccrual	38		7		12		22		14		18		23		—		134
Total personal	254,582		193,574		154,939		172,308		68,902		201,296		555,213		336		1,601,150
Total loans to individuals	609,400		570,755		560,186		247,994		131,036		684,939		910,199		23,365		3,737,874
Total loans	$	4,453,665	$	3,294,886	$	2,107,063	$	1,734,561	$	1,157,972	$	2,992,242	$	6,790,248	$	26,513	$	22,557,150

Financing Receivable, Nonaccrual [Table Text Block]

A summary of nonaccruing loans at September 30, 2023 follows (in thousands): 

	As of September 30, 2023
	Total		With No Allowance		With Allowance		Related Allowance
Commercial:
Energy	$	19,559	$	19,559	$	—	$	—
Healthcare	41,836		41,836		—		—
Services	2,820		337		2,483		1,646
General business	6,483		6,483		—		—
Total commercial	70,698		68,215		2,483		1,646
Commercial real estate	7,418		7,418		—		—
Loans to individuals:
Residential mortgage	30,954		30,954		—		—
Residential mortgage guaranteed by U.S. government agencies	10,436		10,436		—		—
Personal	79		79		—		—
Total loans to individuals	41,469		41,469		—		—
Total	$	119,585	$	117,102	$	2,483	$	1,646

A summary of nonaccruing loans at December 31, 2022 follows (in thousands): 

	As of December 31, 2022
	Total		With No Allowance		With Allowance		Related Allowance
Commercial:
Energy	$	1,399	$	1,399	$	—	$	—
Healthcare	41,034		34,661		6,373		946
Services	16,228		7,835		8,393		3,074
General business	1,636		1,636		—		—
Total commercial	60,297		45,531		14,766		4,020
Commercial real estate	16,570		393		16,177		1,550
Loans to individuals:
Residential mortgage	29,791		29,791		—		—
Residential mortgage guaranteed by U.S. government agencies	15,005		15,005		—		—
Personal	134		134		—		—
Total loans to individuals	44,930		44,930		—		—
Total	$	121,797	$	90,854	$	30,943	$	5,570

Summary of Loans by Aging Status [Table Text Block]

A summary of loans currently performing and past due as of September 30, 2023 is as follows (in thousands):

			Past Due								Past Due 90 Days or More and Accruing
	Current		30 to 59 Days		60 to 89 Days		90 Days or More		Total
Commercial:
Energy	$	3,490,602	$	—	$	—	$	—	$	3,490,602	$	—
Healthcare	4,051,359		10		—		31,765		4,083,134		—
Services	3,564,401		599		324		1,037		3,566,361		—
General business	3,573,237		37		112		6,356		3,579,742		13
Total commercial	14,679,599		646		436		39,158		14,719,839		13
Commercial real estate	5,233,549		—		488		7,263		5,241,300		—
Loans to individuals:
Residential mortgage	2,077,418		9,713		818		3,043		2,090,992		51
Residential mortgage guaranteed by U.S. government agencies	58,486		31,390		19,004		52,212		161,092		47,670
Personal	1,510,472		298		2		23		1,510,795		—
Total loans to individuals	3,646,376		41,401		19,824		55,278		3,762,879		47,721
Total	$	23,559,524	$	42,047	$	20,748	$	101,699	$	23,724,018	$	47,734

A summary of loans currently performing and past due as of December 31, 2022 is as follows (in thousands):

			Past Due								Past Due 90 Days or More and Accruing
	Current		30 to 59 Days		60 to 89 Days		90 Days or More		Total
Commercial:
Energy	$	3,424,766	$	24	$	—	$	—	$	3,424,790	$	—
Healthcare	3,812,164		5,914		26,480		459		3,845,017		—
Services	3,423,042		1,060		2,461		4,958		3,431,521		—
General business	3,509,094		257		1,424		396		3,511,171		396
Total commercial	14,169,066		7,255		30,365		5,813		14,212,499		396
Commercial real estate	4,606,029		531		—		217		4,606,777		—
Loans to individuals:
Residential mortgage	1,872,155		10,632		1,828		6,169		1,890,784		114
Residential mortgage guaranteed by U.S. government agencies	108,019		36,119		19,400		82,402		245,940		75,604
Personal	1,600,595		502		21		32		1,601,150		—
Total loans to individuals	3,580,769		47,253		21,249		88,603		3,737,874		75,718
Total	$	22,355,864	$	55,039	$	51,614	$	94,633	$	22,557,150	$	76,114

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Mortgage Banking Activities (Tables)

9 Months Ended

Sep. 30, 2023

Mortgage Banking [Abstract]

Components of Residential Mortgage Loans Held For Sale [Table Text Block]

	September 30, 2023				December 31, 2022
	Unpaid Principal Balance/ Notional		Fair Value		Unpaid Principal Balance/ Notional		Fair Value
Residential mortgage loans held for sale	$	71,304	$	69,653	$	74,941	$	73,938
Residential mortgage loan commitments	49,285		1,541		45,492		1,054
Forward sales contracts	102,529		1,295		109,469		280
			$	72,489			$	75,272

Mortgage Banking Revenue [Table Text Block]

Mortgage banking revenue was as follows (in thousands):

	Three Months Ended September 30,				Nine Months Ended Sep. 30,
	2023		2022		2023		2022
Production revenue:
Net realized gains (losses) on sale of mortgage loans	$	(1,631)	$	(1,072)	$	(3,658)	$	8,969
Net change in unrealized loss on mortgage loans held for sale	(522)		(6,244)		(648)		(9,764)
Net change in the fair value of mortgage loan commitments	(288)		(3,174)		487		(5,474)
Net change in the fair value of forward sales contracts	554		8,084		1,015		8,414
Total production revenue (loss)	(1,887)		(2,406)		(2,804)		2,145
Servicing revenue	15,243		13,688		45,668		37,155
Total mortgage banking revenue	$	13,356	$	11,282	$	42,864	$	39,300

Summary of Mortgage Servicing Rights [Table Text Block]

The following represents a summary of mortgage servicing rights (dollars in thousands):

	September 30, 2023			December 31, 2022
Number of residential mortgage loans serviced for others	116,941			110,541
Outstanding principal balance of residential mortgage loans serviced for others	$	20,607,013		$	18,863,201
Weighted average interest rate	3.61		%	3.59		%
Remaining term (in months)	282			283

Activity in Capitalized Mortgage Servicing Rights [Table Text Block]

The following represents activity in capitalized mortgage servicing rights (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Beginning Balance	$	304,722	$	270,312	$	277,608	$	163,198
Additions	3,154		4,841		9,757		15,810
Acquisitions	2,669		1,043		33,807		45,910
Change in fair value due to principal payments	(7,202)		(8,960)		(21,031)		(24,277)
Change in fair value due to market assumption changes	8,039		16,570		11,241		83,165
Ending Balance	$	311,382	$	283,806	$	311,382	$	283,806

Assumptions to Value Mortgage Servicing Rights [Table Text Block]

Mortgage servicing rights are not traded in active markets. Fair value is determined by discounting the projected net cash flows. Significant market assumptions used to determine fair value based on significant unobservable inputs were as follows:

	September 30, 2023	December 31, 2022
Discount rate – risk-free rate plus a market premium	9.84%	9.51%
Prepayment rate - based upon loan interest rate, original term and loan type	7.15%	7.54%
Loan servicing costs – annually per loan based upon loan type:
Performing loans	$69 - $94	$69 - $94
Delinquent loans	$150 - $500	$150 - $500
Loans in foreclosure	$875 - $8,000	$875 - $8,000
Escrow earnings rate – indexed to rates paid on deposit accounts with comparable average life	4.66%	4.06%
Primary/secondary mortgage rate spread	105 bps	105 bps
Delinquency rate	2.00%	2.33%

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Shareholders' Equity (Tables)

9 Months Ended

Sep. 30, 2023

Stockholders' Equity Note [Abstract]

Accumulated Other Comprehensive Income (Loss) [Table Text Block]

A rollforward of the components of accumulated other comprehensive income (loss) is included as follows (in thousands):

	Unrealized Gain (Loss) on
	Available for Sale Securities		Investment Securities Transferred from AFS		Employee Benefit Plans		Total
Balance, Dec. 31, 2021	$	69,775	$	—	$	2,596	$	72,371
Net change in unrealized gain (loss)	(1,293,661)		—		—		(1,293,661)
Transfer of net unrealized loss from AFS to investment securities	267,509		(267,509)		—		—
Reclassification adjustments included in earnings:
Interest revenue, Investment securities	—		24,130		—		24,130
Operating expense, Personnel	—		—		(3,483)		(3,483)
Gain on available for sale securities, net	(3,017)		—		—		(3,017)
Other comprehensive loss, before income taxes	(1,029,169)		(243,379)		(3,483)		(1,276,031)
Federal and state income taxes	(240,868)		(56,960)		(887)		(298,715)
Other comprehensive loss, net of income taxes	(788,301)		(186,419)		(2,596)		(977,316)
Balance, September 30, 2022	$	(718,526)	$	(186,419)	$	—	$	(904,945)
Balance, Dec. 31, 2022	$	(664,618)	$	(172,337)	$	—	$	(836,955)
Net change in unrealized gain (loss)	(171,977)		—		—		(171,977)
Reclassification adjustments included in earnings:
Interest revenue, Investment securities	—		46,996		—		46,996
Loss on available for sale securities, net	3,010		—		—		3,010
Other comprehensive income (loss), before income taxes	(168,967)		46,996		—		(121,971)
Federal and state income taxes	(40,735)		10,794		—		(29,941)
Other comprehensive income (loss), net of income taxes	(128,232)		36,202		—		(92,030)
Balance, September 30, 2023	$	(792,850)	$	(136,135)	$	—	$	(928,985)

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Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2023

Earnings Per Share [Abstract]

Earnings Per Share [Table Text Block]

(In thousands, except share and per share amounts)	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Numerator:
Net income attributable to BOK Financial Corp. shareholders	$	134,495	$	156,510	$	448,171	$	351,844
Less: Earnings allocated to participating securities	1,104		1,161		3,561		2,562
Numerator for basic earnings per share – income available to common shareholders	133,391		155,349		444,610		349,282
Effect of reallocating undistributed earnings of participating securities	—		—		—		—
Numerator for diluted earnings per share – income available to common shareholders	$	133,391	$	155,349	$	444,610	$	349,282
Denominator:
Weighted average shares outstanding	66,090,988		67,503,041		66,484,557		67,902,592
Less:  Participating securities included in weighted average shares outstanding	542,681		499,842		529,263		492,803
Denominator for basic earnings per common share	65,548,307		67,003,199		65,955,294		67,409,789
Dilutive effect of employee stock compensation plans	—		1,424		—		1,433
Denominator for diluted earnings per common share	65,548,307		67,004,623		65,955,294		67,411,222
Basic earnings per share	$	2.04	$	2.32	$	6.74	$	5.18
Diluted earnings per share	$	2.04	$	2.32	$	6.74	$	5.18

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Reportable Segments (Tables)

9 Months Ended

Sep. 30, 2023

Segment Reporting [Abstract]

Reportable Segments [Table Text Block]

Reportable segments reconciliation to the Consolidated Financial Statements for the three months ended September 30, 2023 is as follows (in thousands):

	Commercial		Consumer		Wealth Management		Funds Management and Other		BOK Financial Consolidated
Net interest revenue from external sources	$	298,293	$	11,386	$	7,622	$	(16,405)	$	300,896
Net interest revenue (expense) from internal sources	(43,829)		101,222		28,815		(86,208)		—
Net interest revenue (expense)	254,464		112,608		36,437		(102,613)		300,896
Net loans charged off and provision for credit losses	4,904		(73)		9		2,160		7,000
Net interest revenue after provision for credit losses	249,560		112,681		36,428		(104,773)		293,896
Other operating revenue	59,153		30,716		123,614		(15,331)		198,152
Other operating expense	81,751		54,497		89,367		98,698		324,313
Net direct contribution	226,962		88,900		70,675		(218,802)		167,735
Gain (loss) on financial instruments, net	(11)		(9,183)		—		9,194		—
Change in fair value of mortgage servicing rights	—		8,039		—		(8,039)		—
Gain (loss) on repossessed assets, net	(268)		11		—		257		—
Corporate expense allocations	17,834		11,920		14,331		(44,085)		—
Net income (loss) before taxes	208,849		75,847		56,344		(173,305)		167,735
Federal and state income taxes	50,919		17,838		13,315		(48,816)		33,256
Net income (loss)	157,930		58,009		43,029		(124,489)		134,479
Net income attributable to non-controlling interests	—		—		—		(16)		(16)
Net income (loss) attributable to BOK Financial Corp. shareholders	$	157,930	$	58,009	$	43,029	$	(124,473)	$	134,495
Average assets	$	28,849,597	$	9,379,478	$	14,740,641	$	(3,650,164)	$	49,319,552

Reportable segments reconciliation to the Consolidated Financial Statements for the nine months ended September 30, 2023 is as follows (in thousands):

	Commercial		Consumer		Wealth Management		Funds Management and Other		BOK Financial Consolidated
Net interest revenue from external sources	$	886,263	$	50,360	$	32,977	$	5,905	$	975,505
Net interest revenue (expense) from internal sources	(104,543)		285,020		106,918		(287,395)		—
Net interest revenue	781,720		335,380		139,895		(281,490)		975,505
Net loans charged off and provision for credit losses	10,980		2,240		(60)		26,840		40,000
Net interest revenue after provision for credit losses	770,740		333,140		139,955		(308,330)		935,505
Other operating revenue	184,826		93,603		355,568		(48,931)		585,066
Other operating expense	232,364		157,035		256,265		303,134		948,798
Net direct contribution	723,202		269,708		239,258		(660,395)		571,773
Gain (loss) on financial instruments, net	162		(24,113)		—		23,951		—
Change in fair value of mortgage servicing rights	—		11,241		—		(11,241)		—
Gain (loss) on repossessed assets, net	999		25		—		(1,024)		—
Corporate expense allocations	56,956		35,860		39,265		(132,081)		—
Net income (loss) before taxes	667,407		221,001		199,993		(516,628)		571,773
Federal and state income taxes	161,992		51,977		47,200		(138,007)		123,162
Net income (loss)	505,415		169,024		152,793		(378,621)		448,611
Net income attributable to non-controlling interests	—		—		—		440		440
Net income (loss) attributable to BOK Financial Corp. shareholders	$	505,415	$	169,024	$	152,793	$	(379,061)	$	448,171
Average assets	$	28,396,982	$	9,635,204	$	13,128,925	$	(3,412,178)	$	47,748,933

Reportable segments reconciliation to the Consolidated Financial Statements for the three months ended September 30, 2022 is as follows (in thousands):

	Commercial		Consumer		Wealth Management		Funds Management and Other		BOK Financial Consolidated
Net interest revenue from external sources	$	226,016	$	17,482	$	34,746	$	38,081	$	316,325
Net interest revenue (expense) from internal sources	(17,951)		26,469		(1,162)		(7,356)		—
Net interest revenue	208,065		43,951		33,584		30,725		316,325
Net loans charged off and provision for credit losses	(526)		1,408		(22)		14,140		15,000
Net interest revenue after provision for credit losses	208,591		42,543		33,606		16,585		301,325
Other operating revenue	60,386		30,186		113,113		(13,987)		189,698
Other operating expense	75,490		53,236		79,151		86,874		294,751
Net direct contribution	193,487		19,493		67,568		(84,276)		196,272
Gain (loss) on financial instruments, net	4		(21,395)		—		21,391		—
Change in fair value of mortgage servicing rights	—		16,570		—		(16,570)		—
Gain (loss) on repossessed assets, net	(158)		—		—		158		—
Corporate expense allocations	16,438		10,792		12,934		(40,164)		—
Net income before taxes	176,895		3,876		54,634		(39,133)		196,272
Federal and state income taxes	42,761		906		12,826		(16,812)		39,681
Net income	134,134		2,970		41,808		(22,321)		156,591
Net loss attributable to non-controlling interests	—		—		—		81		81
Net income attributable to BOK Financial Corp. shareholders	$	134,134	$	2,970	$	41,808	$	(22,402)	$	156,510
Average assets	$	28,890,429	$	10,233,401	$	13,818,299	$	(7,822,927)	$	45,119,202

Reportable segments reconciliation to the Consolidated Financial Statements for the nine months ended September 30, 2022 is as follows (in thousands):

	Commercial		Consumer		Wealth Management		Funds Management and Other		BOK Financial Consolidated
Net interest revenue from external sources	$	546,599	$	51,183	$	130,389	$	130,583	$	858,754
Net interest revenue (expense) from internal sources	(34,983)		53,764		(3,290)		(15,491)		—
Net interest revenue	511,616		104,947		127,099		115,092		858,754
Net loans charged off and provision for credit losses	3,316		3,716		(153)		8,121		15,000
Net interest revenue after provision for credit losses	508,300		101,231		127,252		106,971		843,754
Other operating revenue	179,501		94,236		224,892		(52,458)		446,171
Other operating expense	210,012		154,685		230,166		251,161		846,024
Net direct contribution	477,789		40,782		121,978		(196,648)		443,901
Gain (loss) on financial instruments, net	(138)		(95,150)		—		95,288		—
Change in fair value of mortgage servicing rights	—		83,165		—		(83,165)		—
Gain (loss) on repossessed assets, net	(2,880)		138		—		2,742		—
Corporate expense allocations	49,285		32,994		37,508		(119,787)		—
Net income before taxes	425,486		(4,059)		84,470		(61,996)		443,901
Federal and state income taxes	103,711		(950)		19,897		(30,658)		92,000
Net income	321,775		(3,109)		64,573		(31,338)		351,901
Net loss attributable to non-controlling interests	—		—		—		57		57
Net income attributable to BOK Financial Corp. shareholders	$	321,775	$	(3,109)	$	64,573	$	(31,395)	$	351,844
Average assets	$	29,324,596	$	10,281,679	$	17,320,779	$	(9,290,763)	$	47,636,291

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Fees and Commissions Revenue Fees and Commissions Rvenue (Tables)

9 Months Ended

Sep. 30, 2023

Revenue from Contract with Customer [Abstract]

Disaggregation of Fees and Commissions Revenue [Table Text Block]

Fees and commissions revenue by reportable segment and primary service line is as follows for the three months ended September 30, 2023 (in thousands):

	Commercial		Consumer		Wealth Management		Funds Management & Other		Consolidated		Out of Scope1		In Scope2
Trading revenue	$	—	$	—	$	34,461	$	(1)	$	34,460	$	34,460	$	—
Customer hedging revenue	7,403		—		(141)		(407)		6,855		6,855		—
Retail brokerage revenue	—		—		4,357		—		4,357		—		4,357
Insurance brokerage revenue	—		—		2,703		—		2,703		—		2,703
Investment banking revenue	4,508		—		9,428		1		13,937		3,823		10,114
Brokerage and trading revenue	11,911		—		50,808		(407)		62,312		45,138		17,174
TransFund EFT network revenue	21,038		875		(18)		1		21,896		—		21,896
Merchant services revenue	2,430		8		—		—		2,438		—		2,438
Corporate card revenue	1,768		—		179		106		2,053		—		2,053
Transaction card revenue	25,236		883		161		107		26,387		—		26,387
Personal trust revenue	—		—		22,890		(1)		22,889		—		22,889
Corporate trust revenue	—		—		8,713		—		8,713		—		8,713
Institutional trust & retirement plan services revenue	—		—		16,883		—		16,883		—		16,883
Investment management services and other revenue	—		—		3,769		2		3,771		—		3,771
Fiduciary and asset management revenue	—		—		52,255		1		52,256		—		52,256
Commercial account service charge revenue	13,687		524		496		2		14,709		—		14,709
Overdraft fee revenue	26		5,427		39		—		5,492		—		5,492
Check card revenue	—		5,926		—		2		5,928		—		5,928
Automated service charge and other deposit fee revenue	285		1,255		10		(3)		1,547		—		1,547
Deposit service charges and fees	13,998		13,132		545		1		27,676		—		27,676
Mortgage production revenue	—		(1,887)		—		—		(1,887)		(1,887)		—
Mortgage servicing revenue	—		15,861		—		(618)		15,243		15,243		—
Mortgage banking revenue	—		13,974		—		(618)		13,356		13,356		—
Other revenue	6,713		2,726		19,845		(13,419)		15,865		9,236		6,629
Total fees and commissions revenue	$	57,858	$	30,715	$	123,614	$	(14,335)	$	197,852	$	67,730	$	130,122

1     Out of scope revenue generally relates to financial instruments or contractual rights and obligations within the scope of other applicable accounting guidance.

2    In scope revenue represents revenue subject to FASB ASC Topic 606, Revenue from Contracts with Customers.

Fees and commissions revenue by reportable segment and primary service line is as follows for the nine months ended September 30, 2023 (in thousands):

	Commercial		Consumer		Wealth Management		Funds Management & Other		Consolidated		Out of Scope1		In Scope2
Trading revenue	$	—	$	—	$	98,980	$	(1)	$	98,979	$	98,979	$	—
Customer hedging revenue	26,729		—		(200)		2,322		28,851		28,851		—
Retail brokerage revenue	—		—		11,522		—		11,522		—		11,522
Insurance brokerage revenue	—		—		8,866		—		8,866		—		8,866
Investment banking revenue	11,720		—		19,775		1		31,496		10,873		20,623
Brokerage and trading revenue	38,449		—		138,943		2,322		179,714		138,703		41,011
TransFund EFT network revenue	62,020		2,690		(52)		5		64,663		—		64,663
Merchant services revenue	7,074		26		—		—		7,100		—		7,100
Corporate card revenue	5,387		—		540		321		6,248		—		6,248
Transaction card revenue	74,481		2,716		488		326		78,011		—		78,011
Personal trust revenue	—		—		71,732		(1)		71,731		—		71,731
Corporate trust revenue	—		—		23,574		—		23,574		—		23,574
Institutional trust & retirement plan services revenue	—		—		43,843		—		43,843		—		43,843
Investment management services and other revenue	—		—		16,782		(20)		16,762		—		16,762
Fiduciary and asset management revenue	—		—		155,931		(21)		155,910		—		155,910
Commercial account service charge revenue	39,922		1,553		1,461		—		42,936		—		42,936
Overdraft fee revenue	83		15,321		101		1		15,506		—		15,506
Check card revenue	—		17,540		—		2		17,542		—		17,542
Automated service charge and other deposit fee revenue	789		3,801		172		(2)		4,760		—		4,760
Deposit service charges and fees	40,794		38,215		1,734		1		80,744		—		80,744
Mortgage production revenue	—		(2,804)		—		—		(2,804)		(2,804)		—
Mortgage servicing revenue	—		47,412		—		(1,744)		45,668		45,668		—
Mortgage banking revenue	—		44,608		—		(1,744)		42,864		42,864		—
Other revenue	19,673		8,118		58,479		(39,185)		47,085		25,963		21,122
Total fees and commissions revenue	$	173,397	$	93,657	$	355,575	$	(38,301)	$	584,328	$	207,530	$	376,798

1     Out of scope revenue generally relates to financial instruments or contractual rights and obligations within the scope of other applicable accounting guidance.

2    In scope revenue represents revenue subject to FASB ASC Topic 606, Revenue from Contracts with Customers.

Fees and commissions revenue by reportable segment and primary service line is as follows for the three months ended September 30, 2022 (in thousands):

	Commercial		Consumer		Wealth Management		Funds Management & Other		Consolidated		Out of Scope1		In Scope2
Trading revenue	$	—	$	—	$	26,463	$	—	$	26,463	$	26,463	$	—
Customer hedging revenue	8,169		—		257		4,753		13,179		13,179		—
Retail brokerage revenue	—		—		3,839		(1)		3,838		—		3,838
Insurance brokerage revenue	—		—		3,254		—		3,254		—		3,254
Investment banking revenue	6,348		—		7,924		—		14,272		5,990		8,282
Brokerage and trading revenue	14,517		—		41,737		4,752		61,006		45,632		15,374
TransFund EFT network revenue	21,243		910		(19)		2		22,136		—		22,136
Merchant services revenue	1,917		8		—		—		1,925		—		1,925
Corporate card revenue	1,711		—		99		103		1,913		—		1,913
Transaction card revenue	24,871		918		80		105		25,974		—		25,974
Personal trust revenue	—		—		23,927		—		23,927		—		23,927
Corporate trust revenue	—		—		6,513		—		6,513		—		6,513
Institutional trust & retirement plan services revenue	—		—		13,019		(1)		13,018		—		13,018
Investment management services and other revenue	—		—		6,817		(85)		6,732		—		6,732
Fiduciary and asset management revenue	—		—		50,276		(86)		50,190		—		50,190
Commercial account service charge revenue	13,361		473		480		—		14,314		—		14,314
Overdraft fee revenue	29		6,936		19		3		6,987		—		6,987
Check card revenue	—		5,944		—		(2)		5,942		—		5,942
Automated service charge and other deposit fee revenue	201		1,205		54		—		1,460		—		1,460
Deposit service charges and fees	13,591		14,558		553		1		28,703		—		28,703
Mortgage production revenue	—		(2,406)		—		—		(2,406)		(2,406)		—
Mortgage servicing revenue	—		14,206		—		(518)		13,688		13,688		—
Mortgage banking revenue	—		11,800		—		(518)		11,282		11,282		—
Other revenue	5,168		2,954		20,467		(13,110)		15,479		4,227		11,252
Total fees and commissions revenue	$	58,147	$	30,230	$	113,113	$	(8,856)	$	192,634	$	61,141	$	131,493

1     Out of scope revenue generally relates to financial instruments or contractual rights and obligations within the scope of other applicable accounting guidance.

2    In scope revenue represents revenue subject to FASB ASC Topic 606, Revenue from Contracts with Customers.

Fees and commissions revenue by reportable segment and primary service line is as follows for the nine months ended September 30, 2022 (in thousands):

	Commercial		Consumer		Wealth Management		Funds Management & Other		Consolidated		Out of Scope1		In Scope2
Trading revenue	$	—	$	—	$	(15,594)	$	—	$	(15,594)	$	(15,594)	$	—
Customer hedging revenue	28,888		—		1,379		6,983		37,250		37,250		—
Retail brokerage revenue	—		—		12,707		(1)		12,706		—		12,706
Insurance brokerage revenue	—		—		9,810		—		9,810		—		9,810
Investment banking revenue	16,775		—		17,023		—		33,798		15,461		18,337
Brokerage and trading revenue	45,663		—		25,325		6,982		77,970		37,117		40,853
TransFund EFT network revenue	59,763		2,708		(55)		5		62,421		—		62,421
Merchant services revenue	9,425		28		—		—		9,453		—		9,453
Corporate card revenue	4,681		—		276		299		5,256		—		5,256
Transaction card revenue	73,869		2,736		221		304		77,130		—		77,130
Personal trust revenue	—		—		73,551		—		73,551		—		73,551
Corporate trust revenue	—		—		16,947		—		16,947		—		16,947
Institutional trust & retirement plan services revenue	—		—		39,009		—		39,009		—		39,009
Investment management services and other revenue	—		—		17,050		(130)		16,920		—		16,920
Fiduciary and asset management revenue	—		—		146,557		(130)		146,427		—		146,427
Commercial account service charge revenue	40,283		1,392		1,516		—		43,191		—		43,191
Overdraft fee revenue	89		19,673		63		4		19,829		—		19,829
Check card revenue	—		17,502		—		—		17,502		—		17,502
Automated service charge and other deposit fee revenue	245		3,373		65		2		3,685		—		3,685
Deposit service charges and fees	40,617		41,940		1,644		6		84,207		—		84,207
Mortgage production revenue	—		2,145		—		—		2,145		2,145		—
Mortgage servicing revenue	—		38,650		—		(1,495)		37,155		37,155		—
Mortgage banking revenue	—		40,795		—		(1,495)		39,300		39,300		—
Other revenue	14,843		8,837		51,160		(36,232)		38,608		19,402		19,206
Total fees and commissions revenue	$	174,992	$	94,308	$	224,907	$	(30,565)	$	463,642	$	95,819	$	367,823

1     Out of scope revenue generally relates to financial instruments or contractual rights and obligations within the scope of other applicable accounting guidance.

2    In scope revenue represents revenue subject to FASB ASC Topic 606, Revenue from Contracts with Customers.

XML

Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2023

Fair Value Disclosures [Abstract]

Fair Value Assets And Liabilities Measured On A Recurring Basis [Table Text Block]

The fair value of financial assets and liabilities measured on a recurring basis was as follows as of September 30, 2023 (in thousands):

	Total		Quoted Prices in Active Markets for Identical Instruments (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Trading securities:
U.S. government securities	$	18,843	$	17,932	$	911	$	—
Residential agency mortgage-backed securities	4,653,161		—		4,653,161		—
Municipal securities	51,998		—		51,998		—
Other trading securities	24,099		—		24,099		—
Total trading securities	4,748,101		17,932		4,730,169		—
Available for sale securities:
U.S. Treasury	897		897		—		—
Municipal securities	488,269		—		488,269		—
Residential agency mortgage-backed securities	6,216,955		—		6,216,955		—
Residential non-agency mortgage-backed securities	715,806		—		715,806		—
Commercial agency mortgage-backed securities	4,484,247		—		4,484,247		—
Other debt securities	473		—		—		473
Total available for sale securities	11,906,647		897		11,905,277		473
Fair value option securities — Residential agency mortgage-backed securities	20,215		—		20,215		—
Residential mortgage loans held for sale1	72,489		—		65,179		7,310
Mortgage servicing rights2	311,382		—		—		311,382
Derivative contracts, net of cash collateral3	546,109		1,596		544,513		—
Liabilities:
Derivative contracts, net of cash collateral3	403,947		190		403,757		—

1Residential mortgage loans held for sale measured at fair value on a recurring basis using significant unobservable inputs (Level 3) consist of residential mortgage loans intended for sale to U.S. government agencies that fail to meet conforming standards and are valued at 78.46% of the unpaid principal balance.

2A reconciliation of the beginning and ending fair value of mortgage servicing rights and disclosures of significant assumptions used to determine fair value are presented in Note 5, Mortgage Banking Activities.

3See Note 3 for detail of fair value of derivative contracts by contract type. Derivative contracts in asset and liability positions that were valued based on quoted prices in active markets for identical instruments (Level 1) are primarily exchange-traded interest rate derivative contracts held for trading purposes.

The fair value of financial assets and liabilities measured on a recurring basis was as follows as of December 31, 2022 (in thousands):

	Total		Quoted Prices in Active Markets for Identical Instruments (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Trading securities:
U.S. government securities	$	9,823	$	4,970	$	4,853	$	—
Residential agency mortgage-backed securities	4,406,848		—		4,406,848		—
Municipal securities	21,484		—		21,484		—
Other trading securities	26,006		—		26,006		—
Total trading securities	4,464,161		4,970		4,459,191		—
Available for sale securities:
U.S. Treasury	898		898		—		—
Municipal securities	624,500		—		624,500		—
Residential agency mortgage-backed securities	5,814,496		—		5,814,496		—
Residential non-agency mortgage-backed securities	577,576		—		577,576		—
Commercial agency mortgage-backed securities	4,475,917		—		4,475,917		—
Other debt securities	473		—		—		473
Total available for sale securities	11,493,860		898		11,492,489		473
Fair value option securities — Residential agency mortgage-backed securities	296,590		—		296,590		—
Residential mortgage loans held for sale1	75,272		—		68,054		7,218
Mortgage servicing rights2	277,608		—		—		277,608
Derivative contracts, net of cash collateral3	880,343		2,110		878,233		—
Liabilities:
Derivative contracts, net of cash collateral3	554,900		16		554,884		—

1Residential mortgage loans held for sale measured at fair value on a recurring basis using significant unobservable inputs (Level 3) consist of residential mortgage loans intended for sale to U.S. government agencies that fail to meet conforming standards and are valued at 77.55% of the unpaid principal balance.

2A reconciliation of the beginning and ending fair value of mortgage servicing rights and disclosures of significant assumptions used to determine fair value are presented in Note 5, Mortgage Banking Activities.

3See Note 3 for detail of fair value of derivative contracts by contract type. Derivative contracts in asset and liability positions that were valued based on quoted prices in active markets for identical instruments (Level 1) are primarily exchange-traded interest rate derivative contracts held for trading purposes.

Fair Value Assets Measured on Nonrecurring Basis [Table Text Block]

The following represents the carrying value of assets measured at fair value on a non-recurring basis (and related losses) during the period. The carrying value represents only those assets with a balance at September 30, 2023 for which the fair value was adjusted during the nine months ended September 30, 2023 (in thousands):

							Fair Value Adjustments for the
	Carrying Value at September 30, 2023						Three Months Ended Sep. 30, 2023 Recognized in:				Nine Months Ended Sep. 30, 2023 Recognized in:
	Quoted Prices in Active Markets for Identical Instruments		Significant Other Observable Inputs		Significant Unobservable Inputs		Gross charge-offs against allowance for loan losses		Other gains (losses), net		Gross charge-offs against allowance for loan losses		Other gains (losses), net
Nonaccruing loans	$	—	$	—	$	796	$	2,135	$	—	$	4,932	$	—

The following represents the carrying value of assets measured at fair value on a non-recurring basis (and related losses) during the period. The carrying value represents only those assets with a balance at September 30, 2022 for which the fair value was adjusted during the nine months ended September 30, 2022 (in thousands):

							Fair Value Adjustments for the
	Carrying Value at September 30, 2022						Three Months Ended Sep. 30, 2022 Recognized in:				Nine Months Ended Sep. 30, 2022 Recognized in:
	Quoted Prices in Active Markets for Identical Instruments		Significant Other Observable Inputs		Significant Unobservable Inputs		Gross charge-offs against allowance for loan losses		Other gains (losses), net		Gross charge-offs against allowance for loan losses		Other gains (losses), net
Nonaccruing loans	$	—	$	159	$	126	$	22	$	—	$	499	$	—
Real estate and other repossessed assets	—		649		1,699		—		—		—		(5,705)

Fair Value Inputs, Fair Value Measured On a Nonrecurring Basis, Quantitative Information [Table Text Block]

A summary of quantitative information about Non-recurring Fair Value Measurements based on Significant Unobservable Inputs (Level 3) as of September 30, 2023 follows (dollars in thousands):

	Fair Value		Valuation Technique(s)	Unobservable Input	Range (Weighted Average)
Nonaccruing loans	$	796	Discounted cash flows	Management knowledge of industry and non-real estate collateral	12% - 14% (14%)1

1    Represents fair value as a percentage of the unpaid principal balance.    

A summary of quantitative information about Non-recurring Fair Value Measurements based on Significant Unobservable Inputs (Level 3) as of September 30, 2022 follows (dollars in thousands):

	Fair Value		Valuation Technique(s)	Unobservable Input	Range (Weighted Average)
Nonaccruing loans	$	126	Discounted cash flows	Management knowledge of industry and non-real estate collateral including, but not limited to, recoverable oil and gas reserves, forward-looking commodity prices, estimated operating costs	25% - 25% (25%)1
Real estate and other repossessed assets	1,699		Discounted cash flows	Management knowledge of industry and non-real estate collateral	N/A

1    Represents fair value as a percentage of the unpaid principal balance.

Fair Value of Financial Instruments [Table Text Block]

The following table presents the carrying values and estimated fair values of all financial instruments, including those financial assets and liabilities that are not measured and reported at fair value on a recurring basis or are measured at fair value on a non-recurring basis as of September 30, 2023 (in thousands):

	Carrying Value		Estimated Fair Value		Quoted Prices in Active Markets for Identical Instruments (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Cash and due from banks	$	854,161	$	854,161	$	854,161	$	—	$	—
Interest-bearing cash and cash equivalents	520,774		520,774		520,774		—		—
Trading securities:
U.S. government securities	18,843		18,843		17,932		911		—
Residential agency mortgage-backed securities	4,653,161		4,653,161		—		4,653,161		—
Municipal securities	51,998		51,998		—		51,998		—
Other trading securities	24,099		24,099		—		24,099		—
Total trading securities	4,748,101		4,748,101		17,932		4,730,169		—
Investment securities:
Municipal securities	121,003		122,695		—		11,957		110,738
Residential agency mortgage-backed securities	2,146,133		1,901,143		—		1,901,143		—
Commercial agency mortgage-backed securities	15,838		14,371		—		14,371		—
Other debt securities	15,788		14,158		—		14,158		—
Total investment securities	2,298,762		2,052,367		—		1,941,629		110,738
Allowance for credit losses	(344)		—		—		—		—
Investment securities, net of allowance	2,298,418		2,052,367		—		1,941,629		110,738
Available for sale securities:
U.S. Treasury	897		897		897		—		—
Municipal securities	488,269		488,269		—		488,269		—
Residential agency mortgage-backed securities	6,216,955		6,216,955		—		6,216,955		—
Residential non-agency mortgage-backed securities	715,806		715,806		—		715,806		—
Commercial agency mortgage-backed securities	4,484,247		4,484,247		—		4,484,247		—
Other debt securities	473		473		—		—		473
Total available for sale securities	11,906,647		11,906,647		897		11,905,277		473
Fair value option securities — Residential agency mortgage-backed securities	20,215		20,215		—		20,215		—
Residential mortgage loans held for sale	72,489		72,489		—		65,179		7,310
Loans:
Commercial	14,719,839		14,603,075		—		—		14,603,075
Commercial real estate	5,241,300		5,094,865		—		—		5,094,865
Loans to individuals	3,762,879		3,512,686		—		—		3,512,686
Total loans	23,724,018		23,210,626		—		—		23,210,626
Allowance for loan losses	(272,114)		—		—		—		—
Loans, net of allowance	23,451,904		23,210,626		—		—		23,210,626
Mortgage servicing rights	311,382		311,382		—		—		311,382
Derivative instruments with positive fair value, net of cash collateral	546,109		546,109		1,596		544,513		—
Deposits with no stated maturity	30,725,335		30,725,335		—		—		30,725,335
Time deposits	2,927,217		2,986,307		—		—		2,986,307
Other borrowed funds	8,924,642		8,922,567		—		—		8,922,567
Subordinated debentures	131,152		116,911		—		116,911		—
Derivative instruments with negative fair value, net of cash collateral	403,947		403,947		190		403,757		—

The following table presents the carrying values and estimated fair values of all financial instruments, including those financial assets and liabilities that are not measured and reported at fair value on a recurring basis or are measured at fair value on a non-recurring basis as of December 31, 2022 (in thousands):

	Carrying Value		Estimated Fair Value		Quoted Prices in Active Markets for Identical Instruments (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Cash and due from banks	$	943,810	$	943,810	$	943,810	$	—	$	—
Interest-bearing cash and cash equivalents	457,906		457,906		457,906		—		—
Trading securities:
U.S. government securities	9,823		9,823		4,970		4,853		—
Residential agency mortgage-backed securities	4,406,848		4,406,848		—		4,406,848		—
Municipal securities	21,484		21,484		—		21,484		—
Other trading securities	26,006		26,006		—		26,006		—
Total trading securities	4,464,161		4,464,161		4,970		4,459,191		—
Investment securities:
Municipal securities	170,629		176,621		—		38,106		138,515
Residential agency mortgage-backed securities	2,315,219		2,143,360		—		2,143,360		—
Commercial agency mortgage-backed securities	15,609		14,588		—		14,588		—
Other debt securities	12,788		12,199		—		12,199		—
Total investment securities	2,514,245		2,346,768		—		2,208,253		138,515
Allowance for credit losses	(558)		—		—		—		—
Investment securities, net of allowance	2,513,687		2,346,768		—		2,208,253		138,515
Available for sale securities:
U.S. Treasury	898		898		898		—		—
Municipal securities	624,500		624,500		—		624,500		—
Residential agency mortgage-backed securities	5,814,496		5,814,496		—		5,814,496		—
Residential non-agency mortgage-backed securities	577,576		577,576		—		577,576		—
Commercial agency mortgage-backed securities	4,475,917		4,475,917		—		4,475,917		—
Other debt securities	473		473		—		—		473
Total available for sale securities	11,493,860		11,493,860		898		11,492,489		473
Fair value option securities — Residential agency mortgage-backed securities	296,590		296,590		—		296,590		—
Residential mortgage loans held for sale	75,272		75,272		—		68,054		7,218
Loans:
Commercial	14,212,499		13,905,765		—		—		13,905,765
Commercial real estate	4,606,777		4,454,048		—		—		4,454,048
Loans to individuals	3,737,874		3,531,410		—		—		3,531,410
Total loans	22,557,150		21,891,223		—		—		21,891,223
Allowance for loan losses	(235,704)		—		—		—		—
Loans, net of allowance	22,321,446		21,891,223		—		—		21,891,223
Mortgage servicing rights	277,608		277,608		—		—		277,608
Derivative instruments with positive fair value, net of cash collateral	880,343		880,343		2,110		878,233		—
Deposits with no stated maturity	33,018,863		33,018,863		—		—		33,018,863
Time deposits	1,461,842		1,431,245		—		—		1,431,245
Other borrowed funds	7,007,285		7,005,305		—		—		7,005,305
Subordinated debentures	131,205		121,497		—		121,497		—
Derivative instruments with negative fair value, net of cash collateral	554,900		554,900		16		554,884		—

XML

Significant Accounting Policies Loans and Allowance for Credit Losses (Details)	9 Months Ended
	Sep. 30, 2023
Loans and Allowance for Credit Losses [Abstract]
Loans, Number of Days Past Due for a Non-Risk Graded Loan to be Placed on Nonaccruing Status	90 days
Loans, Number of Days After Notification of Chapter 7 Bankruptcy Non-Risk Graded Loan is Placed on Nonaccruing Status	60 days
Loans and Allowances for Credit Losses, Minimum No of Days After Which Past Due Non-Risk Graded Loans Are Charged Off	60 days
Loans and Allowances for Credit Losses, Maximum No of Days After Which Past Due Non-Risk Graded Loans Are Charged Off	180 days
Loans, Number of Days After Notification of Chapter 7 Bankruptcy Non-Risk Graded Loan is Charged Off	60 days

XML

Trading Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Schedule of Trading Securities [Line Items]
Trading Securities, Fair Value	$ 4,748,101	$ 4,464,161
Trading Securities, Net Unrealized Gain (Loss)	(108,259)	(323)
U.S. government securities [Member]
Schedule of Trading Securities [Line Items]
Trading Securities, Fair Value	18,843	9,823
Trading Securities, Net Unrealized Gain (Loss)	8	(16)
Residential agency mortgage-backed securities [Member]
Schedule of Trading Securities [Line Items]
Trading Securities, Fair Value	4,653,161	4,406,848
Trading Securities, Net Unrealized Gain (Loss)	(107,212)	4
Municipal securities [Member]
Schedule of Trading Securities [Line Items]
Trading Securities, Fair Value	51,998	21,484
Trading Securities, Net Unrealized Gain (Loss)	(1,175)	(136)
Other trading securities [Member]
Schedule of Trading Securities [Line Items]
Trading Securities, Fair Value	24,099	26,006
Trading Securities, Net Unrealized Gain (Loss)	$ 120	$ (175)

XML

Investment (Held-to-Maturity) Securities (Details) $ in Thousands		3 Months Ended		9 Months Ended		12 Months Ended
		Sep. 30, 2023 USD ($)		Sep. 30, 2023 USD ($)		Dec. 31, 2022 USD ($)
Schedule of Investment (Held-to-Maturity) Securities [Line Items]
Investment Securities, Gross Amortized Cost		$ 2,476,759		$ 2,476,759		$ 2,739,241
Investment Securities, Gross Carrying Value		2,298,762	[1]	2,298,762	[1]	2,514,245	[2]
Investment securities, Allowance for Credit Loss		(344)	[1]	(344)	[1]	(558)	[2]
Investment Securities, Amortized Cost, After Allowance for Credit Loss		2,476,415		2,476,415		2,738,683
Investment Securities, Carrying Value, after Allowance for Credit Loss		2,298,418	[1]	2,298,418	[1]	2,513,687	[2]
Investment Securities, Fair Value		2,052,367		2,052,367		2,346,768
Investment Securities, Gross Unrealized Gain		2,977		2,977		6,611
Investment Securities, Gross Unrealized Loss		$ (249,372)		(249,372)		(174,088)
Debt Securities, Net Unrealized Loss Remaining in AOCI included in Carrying Value for AFS Securities Transferred to Investment Securities				$ (178,000)		$ (225,000)
Investment Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]
Investment Securities, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		180		180		143
Investment Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Investment Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 28,962		$ 28,962		$ 2,184,167
Investment Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		1,929,282		1,929,282		801
Investment Securities, Continuous Unrealized Loss Position, Fair Value		1,958,244		1,958,244		2,184,968
Investment Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]
Investment Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		601		601		174,012
Investment Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		248,771		248,771		76
Investment Securities, Continuous Unrealized Loss Position, Accumulated Loss		249,372		249,372		174,088
Fixed Maturity Securities [Member]
Investment Securities, Debt Maturities, Net Carrying Value [Abstract]
Investment Securities, Debt Maturities, Less than One Year, Net Carrying Value		17,756		17,756
Investment Securities, Debt Maturities, One to Five Years, Net Carrying Value		100,534		100,534
Investment Securities, Debt Maturities, Six to Ten Years, Net Carrying Value		34,326		34,326
Investment Securities, Debt Maturities, Over Ten Years, Net Carrying Value		13		13
Investment Securities, Debt Maturities, Single Maturity Date, Net Carrying Value		152,629		152,629
Investment Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]
Investment Securities, Debt Maturities, Less Than One Year, Fair Value		17,804		17,804
Investment Securities, Debt Maturities, One to Five Years, Fair Value		102,168		102,168
Investment Securities, Debt Maturities, Six to Ten Years, Fair Value		31,239		31,239
Investment Securities, Debt Maturities, Over Ten Years, Fair Value		13		13
Investment Securities, Debt Maturities, Single Maturity Date, Fair Value		$ 151,224		$ 151,224
Investment Securities, Debt Maturities, Weighted Average Maturity	[3]	3.53		3.53
Municipal securities [Member]
Schedule of Investment (Held-to-Maturity) Securities [Line Items]
Investment Securities, Gross Amortized Cost		$ 121,003		$ 121,003		170,629
Investment Securities, Gross Carrying Value		121,003	[1]	121,003	[1]	170,629	[2]
Investment Securities, Fair Value		122,695		122,695		176,621
Investment Securities, Gross Unrealized Gain		2,882		2,882		6,456
Investment Securities, Gross Unrealized Loss		$ (1,190)		$ (1,190)		$ (464)
Investment Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]
Investment Securities, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		59		59		22
Investment Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Investment Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 28,962		$ 28,962		$ 18,037
Investment Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		6,200		6,200		544
Investment Securities, Continuous Unrealized Loss Position, Fair Value		35,162		35,162		18,581
Investment Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]
Investment Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		601		601		406
Investment Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		589		589		58
Investment Securities, Continuous Unrealized Loss Position, Accumulated Loss		1,190		1,190		464
Residential agency mortgage-backed securities [Member]
Schedule of Investment (Held-to-Maturity) Securities [Line Items]
Investment Securities, Gross Amortized Cost		2,322,710		2,322,710		2,538,565
Investment Securities, Gross Carrying Value		2,146,133	[1]	2,146,133	[1]	2,315,219	[2]
Investment Securities, Fair Value		1,901,143		1,901,143		2,143,360
Investment Securities, Gross Unrealized Gain		95		95		155
Investment Securities, Gross Unrealized Loss		(245,085)		(245,085)		$ (172,014)
Investment Securities, Debt Maturities, Net Carrying Value [Abstract]
Investment Securities, Debt Maturities, without Single Maturity Date, Net Carrying Value	[4]	2,146,133		2,146,133
Investment Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]
Investment Securities, Debt Maturities, without Single Maturity Date, Fair Value		$ 1,901,143		$ 1,901,143
Investment Securities, Debt Maturities, Average Expected Life of Mortgage-backed Securities		5 years 3 months 18 days
Investment Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]
Investment Securities, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		116		116		116
Investment Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Investment Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 0		$ 0		$ 2,142,114
Investment Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		1,900,066		1,900,066		0
Investment Securities, Continuous Unrealized Loss Position, Fair Value		1,900,066		1,900,066		2,142,114
Investment Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]
Investment Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		0		0		172,014
Investment Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		245,085		245,085		0
Investment Securities, Continuous Unrealized Loss Position, Accumulated Loss		245,085		245,085		172,014
Commercial agency mortgage-backed securities [Member]
Schedule of Investment (Held-to-Maturity) Securities [Line Items]
Investment Securities, Gross Amortized Cost		17,258		17,258		17,259
Investment Securities, Gross Carrying Value		15,838	[1]	15,838	[1]	15,609	[2]
Investment Securities, Fair Value		14,371		14,371		14,588
Investment Securities, Gross Unrealized Gain		0		0		0
Investment Securities, Gross Unrealized Loss		$ (1,467)		$ (1,467)		$ (1,021)
Investment Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]
Investment Securities, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		2		2		2
Investment Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Investment Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 0		$ 0		$ 14,588
Investment Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		14,371		14,371		0
Investment Securities, Continuous Unrealized Loss Position, Fair Value		14,371		14,371		14,588
Investment Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]
Investment Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		0		0		1,021
Investment Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		1,467		1,467		0
Investment Securities, Continuous Unrealized Loss Position, Accumulated Loss		1,467		1,467		1,021
Other debt securities [Member]
Schedule of Investment (Held-to-Maturity) Securities [Line Items]
Investment Securities, Gross Amortized Cost		15,788		15,788		12,788
Investment Securities, Gross Carrying Value		15,788	[1]	15,788	[1]	12,788	[2]
Investment Securities, Fair Value		14,158		14,158		12,199
Investment Securities, Gross Unrealized Gain		0		0		0
Investment Securities, Gross Unrealized Loss		$ (1,630)		$ (1,630)		$ (589)
Investment Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]
Investment Securities, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		3		3		3
Investment Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Investment Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 0		$ 0		$ 9,428
Investment Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		8,645		8,645		257
Investment Securities, Continuous Unrealized Loss Position, Fair Value		8,645		8,645		9,685
Investment Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]
Investment Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		0		0		571
Investment Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		1,630		1,630		18
Investment Securities, Continuous Unrealized Loss Position, Accumulated Loss		$ 1,630		$ 1,630		$ 589

[1] Carrying value includes $178 million of net unrealized loss which remains in Accumulated other comprehensive income ("AOCI") in the Consolidated Balance Sheets related to certain securities transferred during the second quarter of 2022 from the Available for Sale securities portfolio to the Investment securities portfolio.

[2] Carrying value includes $225 million of net unrealized loss which remains in AOCI in the Consolidated Balance Sheets related to certain securities transferred during the second quarter of 2022 from the Available for Sale securities portfolio to the Investment securities portfolio.

[3] Expected maturities may differ from contractual maturities, because borrowers may have the right to call or prepay obligations with or without penalty.

[4] The average expected lives of residential mortgage-backed securities were 5.3 years based upon current prepayment assumptions.

XML

Available for Sale Securities (Details) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost		$ 12,941,167		$ 12,941,167		$ 12,359,413
Available-for-sale Securities, Fair Value		11,906,647		11,906,647		11,493,860
Available-for-sale Securities, Gross Unrealized Gain		10,029		10,029		28,661
Available-for-sale Securities, Gross Unrealized Loss		(1,044,549)		(1,044,549)		$ (894,214)
Debt Securities, Available-for-sale, Realized Gain (Loss) [Abstract]
Available-for-sale Securities, Proceeds		0	$ 30,834	135,489	$ 242,135
Available-for-sale Securities, Gross realized gains		0	1,116	703	4,510
Available-for-sale Securities, Gross realized losses		0	(224)	(3,713)	(1,493)
Available-for-sale Securities, Related federal and state income tax expense (benefit)		$ 0	$ 209	$ (708)	$ 706
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		1,286		1,286		1,153
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 3,374,924		$ 3,374,924		$ 6,173,710
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		84,298		84,298		376,598
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		8,416,005		8,416,005		3,829,168
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		960,251		960,251		517,616
Debt Securities, Available-for-sale, Unrealized Loss Position		11,790,929		11,790,929		10,002,878
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss		1,044,549		1,044,549		894,214
Asset Pledged as Collateral with Right
Debt Securities, Available-for-sale, Realized Gain (Loss) [Abstract]
Pledged Securities		13,100,000		13,100,000		11,200,000
Fixed Maturity Securities [Member]
Debt Securities, Available-for-sale, Maturity, Amortized Cost, Rolling Maturity [Abstract]
Available-for-sale Securities, Debt Maturities, Less than One Year, Amortized Cost Basis		347,874		347,874
Available-for-sale Securities, Debt Maturities, One to Five Years, Amortized Cost Basis		3,048,923		3,048,923
Available-for-sale Securities, Debt Maturities, Six To Ten Years, Amortized Cost Basis		1,554,983		1,554,983
Available-for-sale Securities, Debt Maturities, Over Ten Years, Amortized Cost Basis		528,711		528,711
Available-for-sale Securities, Debt Maturities, Allocated and Single Maturity Date, Amortized Cost		5,480,491		5,480,491
Debt Securities, Available-for-sale, Maturity, Fair Value, Rolling Maturity [Abstract]
Available-for-sale Securities, Debt Maturities, Less than One Year, Fair Value		341,476		341,476
Available-for-sale Securities, Debt Maturities, One to Five Years, Fair Value		2,759,574		2,759,574
Available-for-sale Securities, Debt Maturities, Six to Ten Years, Fair Value		1,382,272		1,382,272
Available-for-sale Securities, Debt Maturities, Over Ten Years, Fair Value		490,564		490,564
Available-for-sale Securities, Debt Maturities, Allocated and Single Maturity Date, Fair Value		$ 4,973,886		$ 4,973,886
Available-for-sale Securities, Debt Maturities, Weighted Average Maturity	[1]	5.58		5.58
U.S. Treasury [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost		$ 1,000		$ 1,000		1,000
Available-for-sale Securities, Fair Value		897		897		898
Available-for-sale Securities, Gross Unrealized Gain		0		0		0
Available-for-sale Securities, Gross Unrealized Loss		$ (103)		$ (103)		$ (102)
Debt Securities, Available-for-sale, Realized Gain (Loss) [Abstract]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		1		1		1
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 0		$ 0		$ 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		0		0		0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		897		897		899
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		103		103		102
Debt Securities, Available-for-sale, Unrealized Loss Position		897		897		899
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss		103		103		102
Municipal securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost		545,940		545,940		687,875
Available-for-sale Securities, Fair Value		488,269		488,269		624,500
Available-for-sale Securities, Gross Unrealized Gain		0		0		321
Available-for-sale Securities, Gross Unrealized Loss		$ (57,671)		$ (57,671)		$ (63,696)
Debt Securities, Available-for-sale, Realized Gain (Loss) [Abstract]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		191		191		227
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 7,688		$ 7,688		$ 146,634
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		606		606		5,301
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		480,582		480,582		428,248
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		57,065		57,065		58,395
Debt Securities, Available-for-sale, Unrealized Loss Position		488,270		488,270		574,882
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss		57,671		57,671		63,696
Commercial agency mortgage-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost		4,933,051		4,933,051		4,892,257
Available-for-sale Securities, Fair Value		4,484,247		4,484,247		4,475,917
Available-for-sale Securities, Gross Unrealized Gain		37		37		3,479
Available-for-sale Securities, Gross Unrealized Loss		$ (448,841)		$ (448,841)		$ (419,819)
Debt Securities, Available-for-sale, Realized Gain (Loss) [Abstract]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		302		302		285
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 821,238		$ 821,238		$ 1,647,778
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		20,920		20,920		63,701
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		3,622,841		3,622,841		2,535,816
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		427,921		427,921		356,118
Debt Securities, Available-for-sale, Unrealized Loss Position		4,444,079		4,444,079		4,183,594
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss		448,841		448,841		419,819
Other debt securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost		500		500		500
Available-for-sale Securities, Fair Value		473		473		473
Available-for-sale Securities, Gross Unrealized Gain		0		0		0
Available-for-sale Securities, Gross Unrealized Loss		$ (27)		$ (27)		$ (27)
Debt Securities, Available-for-sale, Realized Gain (Loss) [Abstract]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		1		1		1
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 0		$ 0		$ 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		0		0		0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		473		473		473
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		27		27		27
Debt Securities, Available-for-sale, Unrealized Loss Position		473		473		473
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss		27		27		27
Residential Mortgage Backed Securities [Member]
Debt Securities, Available-for-sale, Maturity, Amortized Cost, Rolling Maturity [Abstract]
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Amortized Cost	[2]	7,460,676		7,460,676
Debt Securities, Available-for-sale, Maturity, Fair Value, Rolling Maturity [Abstract]
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value		$ 6,932,761		6,932,761
Available-for-sale Securities, Debt Maturities, Average Expected Life of Mortgage-backed Securities		4 years 4 months 24 days
Residential agency mortgage-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost		$ 6,686,602		6,686,602		6,161,358
Available-for-sale Securities, Fair Value		6,216,955		6,216,955		5,814,496
Available-for-sale Securities, Gross Unrealized Gain		162		162		13,085
Available-for-sale Securities, Gross Unrealized Loss		$ (469,809)		$ (469,809)		$ (359,947)
Debt Securities, Available-for-sale, Realized Gain (Loss) [Abstract]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		752		752		613
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 2,276,744		$ 2,276,744		$ 3,879,582
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		55,455		55,455		256,973
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		3,879,833		3,879,833		863,732
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		414,354		414,354		102,974
Debt Securities, Available-for-sale, Unrealized Loss Position		6,156,577		6,156,577		4,743,314
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss		469,809		469,809		359,947
Residential non-agency mortgage-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost		774,074		774,074		616,423
Available-for-sale Securities, Fair Value		715,806		715,806		577,576
Available-for-sale Securities, Gross Unrealized Gain		9,830		9,830		11,776
Available-for-sale Securities, Gross Unrealized Loss		$ (68,098)		$ (68,098)		$ (50,623)
Debt Securities, Available-for-sale, Realized Gain (Loss) [Abstract]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		39		39		26
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 269,254		$ 269,254		$ 499,716
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		7,317		7,317		50,623
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		431,379		431,379		0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		60,781		60,781		0
Debt Securities, Available-for-sale, Unrealized Loss Position		700,633		700,633		499,716
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss		$ 68,098		$ 68,098		$ 50,623

[1] Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without penalty.

[2] The average expected lives of residential mortgage-backed securities were 4.4 years based upon current prepayment assumptions.

XML

Securities Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value (Details) $ in Thousands	Sep. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	1,286	1,153
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 3,374,924	$ 6,173,710
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	8,416,005	3,829,168
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	11,790,929	10,002,878
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	84,298	376,598
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	960,251	517,616
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 1,044,549	$ 894,214
U.S. Treasury [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	1	1
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 0	$ 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	897	899
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	897	899
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	103	102
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 103	$ 102
Municipal securities [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	191	227
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 7,688	$ 146,634
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	480,582	428,248
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	488,270	574,882
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	606	5,301
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	57,065	58,395
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 57,671	$ 63,696
Residential agency mortgage-backed securities [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	752	613
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 2,276,744	$ 3,879,582
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	3,879,833	863,732
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	6,156,577	4,743,314
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	55,455	256,973
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	414,354	102,974
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 469,809	$ 359,947
Residential non-agency mortgage-backed securities [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	39	26
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 269,254	$ 499,716
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	431,379	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	700,633	499,716
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	7,317	50,623
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	60,781	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 68,098	$ 50,623
Commercial agency mortgage-backed securities [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	302	285
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 821,238	$ 1,647,778
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	3,622,841	2,535,816
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	4,444,079	4,183,594
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	20,920	63,701
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	427,921	356,118
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 448,841	$ 419,819
Other debt securities [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	1	1
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 0	$ 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	473	473
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	473	473
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	27	27
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 27	$ 27

XML

Securities Fair Value Option Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Fair Value Option Securities [Line Items]
Fair value option securities, Fair Value	$ 20,215	$ 296,590
Residential agency mortgage-backed securities [Member]
Fair Value Option Securities [Line Items]
Fair value option securities, Fair Value	20,215	296,590
Fair value option securities, Net Unrealized Gain (Loss)	$ (2,436)	$ 338

XML

Derivatives, Fair Value of Derivatives Contracts (Details) - USD ($) $ in Thousands		Sep. 30, 2023		Dec. 31, 2022
Derivative Assets, Fair Value, Net [Abstract]
Derviative contracts, net of cash collateral, Assets, Fair value		$ 546,109		$ 880,343
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Fair Value, Net of Cash Collateral		403,947		554,900
Not Designated as Hedging Instrument [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional		36,026,931	[1]	28,273,268	[2]
Derivative Liabilities, Notional		30,848,818	[1]	25,778,851	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value		1,436,083		1,736,280
Derivative Assets, Netting Adjustments		(692,894)		(669,203)
Derivative Assets, Net Fair Value Before Cash Collateral		743,189		1,067,077
Derivative Assets, Cash Collateral		(197,080)		(186,734)
Derviative contracts, net of cash collateral, Assets, Fair value		546,109		880,343
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value		1,345,113		1,708,852
Derivative Liabilities, Netting Adjustments		(692,895)		(669,203)
Derivative Liabilities, Net Fair Value Before Cash Collateral		652,218		1,039,649
Derivative Liabilities, Cash Collateral		(248,271)		(484,749)
Derivative Liabilities, Fair Value, Net of Cash Collateral		403,947		554,900
Not Designated as Hedging Instrument [Member] | Total customer risk management programs
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional		11,456,977	[1]	10,788,231	[2]
Derivative Liabilities, Notional		11,775,264	[1]	11,561,139	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value		1,201,274		1,607,870
Derivative Assets, Netting Adjustments		(607,483)		(594,543)
Derivative Assets, Net Fair Value Before Cash Collateral		593,791		1,013,327
Derivative Assets, Cash Collateral		(197,080)		(182,088)
Derviative contracts, net of cash collateral, Assets, Fair value		396,711		831,239
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value		1,189,805		1,612,300
Derivative Liabilities, Netting Adjustments		(607,483)		(594,543)
Derivative Liabilities, Net Fair Value Before Cash Collateral		582,322		1,017,757
Derivative Liabilities, Cash Collateral		(242,133)		(484,326)
Derivative Liabilities, Fair Value, Net of Cash Collateral		340,189		533,431
Not Designated as Hedging Instrument [Member] | Interest rate contracts [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional		2,763,185	[1]	2,629,318	[2]
Derivative Liabilities, Notional	[1]	2,763,185		2,629,122
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value		160,856		158,825
Derivative Assets, Netting Adjustments		0		0
Derivative Assets, Net Fair Value Before Cash Collateral		160,856		158,825
Derivative Assets, Cash Collateral		(160,548)		(114,955)
Derviative contracts, net of cash collateral, Assets, Fair value		308		43,870
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value		160,869		158,816
Derivative Liabilities, Netting Adjustments		0		0
Derivative Liabilities, Net Fair Value Before Cash Collateral		160,869		158,816
Derivative Liabilities, Cash Collateral		0		0
Derivative Liabilities, Fair Value, Net of Cash Collateral		160,869		158,816
Not Designated as Hedging Instrument [Member] | Energy contracts [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional		8,617,592	[1]	7,918,020	[2]
Derivative Liabilities, Notional		8,941,634	[1]	8,696,060	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value		972,109		1,232,283
Derivative Assets, Netting Adjustments		(607,483)		(594,543)
Derivative Assets, Net Fair Value Before Cash Collateral		364,626		637,740
Derivative Assets, Cash Collateral		(34,399)		(67,024)
Derviative contracts, net of cash collateral, Assets, Fair value		330,227		570,716
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value		966,583		1,242,058
Derivative Liabilities, Netting Adjustments		(607,483)		(594,543)
Derivative Liabilities, Net Fair Value Before Cash Collateral		359,100		647,515
Derivative Liabilities, Cash Collateral		(242,133)		(484,319)
Derivative Liabilities, Fair Value, Net of Cash Collateral		116,967		163,196
Not Designated as Hedging Instrument [Member] | Foreign exchange contracts [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional		70,676	[1]	219,791	[2]
Derivative Liabilities, Notional		64,921	[1]	214,855	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value		68,262		216,569
Derivative Assets, Netting Adjustments		0		0
Derivative Assets, Net Fair Value Before Cash Collateral		68,262		216,569
Derivative Assets, Cash Collateral		(2,086)		0
Derviative contracts, net of cash collateral, Assets, Fair value		66,176		216,569
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value		62,306		211,233
Derivative Liabilities, Netting Adjustments		0		0
Derivative Liabilities, Net Fair Value Before Cash Collateral		62,306		211,233
Derivative Liabilities, Cash Collateral		0		(7)
Derivative Liabilities, Fair Value, Net of Cash Collateral		62,306		211,226
Not Designated as Hedging Instrument [Member] | Equity option contracts [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional		5,524	[1]	21,102	[2]
Derivative Liabilities, Notional		5,524	[1]	21,102	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value		47		193
Derivative Assets, Netting Adjustments		0		0
Derivative Assets, Net Fair Value Before Cash Collateral		47		193
Derivative Assets, Cash Collateral		(47)		(109)
Derviative contracts, net of cash collateral, Assets, Fair value		0		84
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value		47		193
Derivative Liabilities, Netting Adjustments		0		0
Derivative Liabilities, Net Fair Value Before Cash Collateral		47		193
Derivative Liabilities, Cash Collateral		0		0
Derivative Liabilities, Fair Value, Net of Cash Collateral		47		193
Not Designated as Hedging Instrument [Member] | Trading [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional		24,569,954	[1]	17,400,037	[2]
Derivative Liabilities, Notional		18,778,554	[1]	14,038,906	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value		234,809		126,910
Derivative Assets, Netting Adjustments		(85,411)		(74,647)
Derivative Assets, Net Fair Value Before Cash Collateral		149,398		52,263
Derivative Assets, Cash Collateral		0		(4,646)
Derviative contracts, net of cash collateral, Assets, Fair value		149,398		47,617
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value		150,983		94,958
Derivative Liabilities, Netting Adjustments		(85,412)		(74,647)
Derivative Liabilities, Net Fair Value Before Cash Collateral		65,571		20,311
Derivative Liabilities, Cash Collateral		(6,138)		(423)
Derivative Liabilities, Fair Value, Net of Cash Collateral		59,433		19,888
Not Designated as Hedging Instrument [Member] | Internal risk management programs [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional		0	[1]	85,000	[2]
Derivative Liabilities, Notional		295,000	[1]	178,806	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value		0		1,500
Derivative Assets, Netting Adjustments		0		(13)
Derivative Assets, Net Fair Value Before Cash Collateral		0		1,487
Derivative Assets, Cash Collateral		0		0
Derviative contracts, net of cash collateral, Assets, Fair value		0		1,487
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value		4,325		1,594
Derivative Liabilities, Netting Adjustments		0		(13)
Derivative Liabilities, Net Fair Value Before Cash Collateral		4,325		1,581
Derivative Liabilities, Cash Collateral		0		0
Derivative Liabilities, Fair Value, Net of Cash Collateral		$ 4,325		$ 1,581

[1] Notional amounts for commodity contracts are converted into dollar-equivalent amounts based on dollar prices at the inception of the contract.

[2] Notional amounts for commodity contracts are converted into dollar-equivalent amounts based on dollar prices at the inception of the contract.

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Derivatives, Derivatives Instruments Gain (Loss) in Income Statement (Details) - Not Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Sep. 30, 2023		Sep. 30, 2022		Sep. 30, 2023		Sep. 30, 2022
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract]
Brokergage and Trading Revenue	$ 28,366		$ 65,552		$ 51,441		$ 105,321
Gain (Loss) on Derivatives, Net	(9,010)		(17,009)		(18,513)		(77,559)
Total customer risk management programs
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract]
Brokergage and Trading Revenue	6,855		13,179		28,851		37,250
Gain (Loss) on Derivatives, Net	0		0		0		0
Interest rate contracts [Member]
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract]
Brokergage and Trading Revenue	800		2,677		4,909		9,958
Gain (Loss) on Derivatives, Net	0		0		0		0
Energy contracts [Member]
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract]
Brokergage and Trading Revenue	5,994		10,386		23,797		26,870
Gain (Loss) on Derivatives, Net	0		0		0		0
Foreign exchange contracts [Member]
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract]
Brokergage and Trading Revenue	61		116		145		422
Gain (Loss) on Derivatives, Net	0		0		0		0
Equity option contracts [Member]
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract]
Brokergage and Trading Revenue	0		0		0		0
Gain (Loss) on Derivatives, Net	0		0		0		0
Trading [Member]
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract]
Brokergage and Trading Revenue	21,511	[1]	52,373	[1]	22,590	[2]	68,071	[2]
Gain (Loss) on Derivatives, Net	0	[1]	0	[1]	0	[2]	0	[2]
Internal risk management programs [Member]
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract]
Brokergage and Trading Revenue	0		0		0		0
Gain (Loss) on Derivatives, Net	$ (9,010)		$ (17,009)		$ (18,513)		$ (77,559)

[1] Represents changes in fair value of to-be-announced securities and other derivative instruments held to mitigate market risk of trading securities portfolio, which is offset by changes in fair value of trading securities also included in Brokerage and Trading Revenue in the Consolidated Statements of Earnings.

[2] Represents changes in fair value of to-be-announced securities and other derivative instruments held to mitigate market risk of trading securities portfolio, which is offset by changes in fair value of trading securities also included in Brokerage and Trading Revenue in the Consolidated Statements of Earnings

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Loans and Allowance for Credit Losses, Loans by Portfolio Type (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Loan receivables disclosure [Abstract]
Loans, fixed rate of interest	$ 6,614,145	$ 6,366,303
Loans, variable rate of interest	16,990,288	16,069,050
Loans, non-accrual	119,585	121,797
Total	23,724,018	22,557,150
Credit Commitments [Abstract]
Outstanding commitments to extend credit	14,400,000
Outstanding standby letters of credit	760,000
Commercial [Member]
Loan receivables disclosure [Abstract]
Loans, fixed rate of interest	3,536,353	3,392,422
Loans, variable rate of interest	11,112,788	10,759,780
Loans, non-accrual	70,698	60,297
Total	14,719,839	14,212,499
Commercial real estate [Member]
Loan receivables disclosure [Abstract]
Loans, fixed rate of interest	848,042	874,716
Loans, variable rate of interest	4,385,840	3,715,491
Loans, non-accrual	7,418	16,570
Total	5,241,300	4,606,777
Loans to individuals [Member]
Loan receivables disclosure [Abstract]
Loans, fixed rate of interest	2,229,750	2,099,165
Loans, variable rate of interest	1,491,660	1,593,779
Loans, non-accrual	41,469	44,930
Total	$ 3,762,879	$ 3,737,874

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Loans and Allowances for Credit Losses, Activity in Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 262,714	$ 241,114	$ 235,704	$ 256,421
Provision for loan losses	15,931	1,111	50,413	(9,014)
Loans charged off	(10,593)	(1,766)	(22,309)	(10,939)
Recoveries of loans previously charged off	4,062	1,309	8,306	5,300
Ending balance	272,114	241,768	272,114	241,768
Provision Details [Abstract]
Provision for credit losses	7,000	15,000	40,000	15,000
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	59,940	42,250	60,919	32,977
Provision for off-balance sheet credit risk	(7,336)	14,060	(8,315)	23,333
Ending balance	52,604	56,310	52,604	56,310
Recorded investment [Abstract]
Collectively measured for impairment, recorded investment	23,604,433		23,604,433		$ 22,435,353
Individually measured for impairment, recorded investment	119,585		119,585		121,797
Total	23,724,018		23,724,018		22,557,150
Related allowance [Abstract]
Collectively measured for impairment, related allowance	270,468		270,468		230,134
Individually measured for impairment, related allowance	1,646		1,646		5,570
Total	272,114		272,114		235,704
Commercial [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	143,269	137,562	131,586	162,056
Provision for loan losses	1,158	3,158	12,908	(17,428)
Loans charged off	(6,769)	(75)	(9,578)	(6,162)
Recoveries of loans previously charged off	273	721	3,015	2,900
Ending balance	137,931	141,366	137,931	141,366
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	20,294	15,839	18,246	13,812
Provision for off-balance sheet credit risk	(2,179)	939	(131)	2,966
Ending balance	18,115	16,778	18,115	16,778
Recorded investment [Abstract]
Collectively measured for impairment, recorded investment	14,649,141		14,649,141		14,152,202
Individually measured for impairment, recorded investment	70,698		70,698		60,297
Total	14,719,839		14,719,839		14,212,499
Related allowance [Abstract]
Collectively measured for impairment, related allowance	136,285		136,285		127,566
Individually measured for impairment, related allowance	1,646		1,646		4,020
Total	137,931		137,931		131,586
Commercial real estate [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	76,347	62,997	57,648	58,553
Provision for loan losses	11,152	(4,415)	35,878	138
Loans charged off	(2,238)	0	(8,446)	(269)
Recoveries of loans previously charged off	3,167	7	3,348	167
Ending balance	88,428	58,589	88,428	58,589
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	37,681	24,670	40,490	17,442
Provision for off-balance sheet credit risk	(5,076)	12,826	(7,885)	20,054
Ending balance	32,605	37,496	32,605	37,496
Recorded investment [Abstract]
Collectively measured for impairment, recorded investment	5,233,882		5,233,882		4,590,207
Individually measured for impairment, recorded investment	7,418		7,418		16,570
Total	5,241,300		5,241,300		4,606,777
Related allowance [Abstract]
Collectively measured for impairment, related allowance	88,428		88,428		56,098
Individually measured for impairment, related allowance	0		0		1,550
Total	88,428		88,428		57,648
Loans to individuals [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	43,098	40,555	46,470	35,812
Provision for loan losses	3,621	2,368	1,627	8,276
Loans charged off	(1,586)	(1,691)	(4,285)	(4,508)
Recoveries of loans previously charged off	622	581	1,943	2,233
Ending balance	45,755	41,813	45,755	41,813
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	1,965	1,741	2,183	1,723
Provision for off-balance sheet credit risk	(81)	295	(299)	313
Ending balance	1,884	$ 2,036	1,884	$ 2,036
Recorded investment [Abstract]
Collectively measured for impairment, recorded investment	3,721,410		3,721,410		3,692,944
Individually measured for impairment, recorded investment	41,469		41,469		44,930
Total	3,762,879		3,762,879		3,737,874
Related allowance [Abstract]
Collectively measured for impairment, related allowance	45,755		45,755		46,470
Individually measured for impairment, related allowance	0		0		0
Total	$ 45,755		$ 45,755		$ 46,470

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Loans and Allowances for Credit Losses, Credit Quality Indicators (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	$ 2,910,988		$ 2,910,988		$ 4,453,665
Financing Receivable, Originated, Year Two	4,421,382		4,421,382		3,294,886
Financing Receivable, Originated, Year Three	3,061,168		3,061,168		2,107,063
Financing Receivable, Originated, Year Four	1,861,717		1,861,717		1,734,561
Financing Receivable, Originated, Year Five	1,414,757		1,414,757		1,157,972
Financing Receivable, Originated, More Than Five Years	3,386,085		3,386,085		2,992,242
Financing Receivable, Revolving	6,641,137		6,641,137		6,790,248
Financing Receivable, Revolving, Converted to Term Loan	26,784		26,784		26,513
Total	23,724,018		23,724,018		22,557,150
Financing Receivable, Allowance for Credit Loss, Writeoff	10,593	$ 1,766	22,309	$ 10,939
Commercial [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	2,066,760		2,066,760		2,655,782
Financing Receivable, Originated, Year Two	2,127,122		2,127,122		1,566,129
Financing Receivable, Originated, Year Three	1,328,425		1,328,425		994,261
Financing Receivable, Originated, Year Four	879,790		879,790		838,006
Financing Receivable, Originated, Year Five	652,330		652,330		779,311
Financing Receivable, Originated, More Than Five Years	2,055,950		2,055,950		1,657,429
Financing Receivable, Revolving	5,606,303		5,606,303		5,718,433
Financing Receivable, Revolving, Converted to Term Loan	3,159		3,159		3,148
Total	14,719,839		14,719,839		14,212,499
Financing Receivable, Allowance for Credit Loss, Writeoff	6,769	75	9,578	6,162
Commercial [Member] | Energy [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	192,614		192,614		157,745
Financing Receivable Year One Originated Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Two	106,593		106,593		76,951
Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Three	45,795		45,795		30,284
Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Four	8,190		8,190		13,447
Financing Receivable Year Four Originated Three Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Five	10,463		10,463		6,377
Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, More Than Five Years	12,626		12,626		5,822
Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Revolving	3,114,321		3,114,321		3,134,164
Financing Receivable Revolving Writeoff			0
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Financing Receivable Revolving Converted to Term Writeoff			0
Total	3,490,602		3,490,602		3,424,790
Financing Receivable, Allowance for Credit Loss, Writeoff			0
Commercial [Member] | Healthcare [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	485,617		485,617		932,097
Financing Receivable Year One Originated Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Two	903,739		903,739		604,886
Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Three	592,250		592,250		476,854
Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Four	471,127		471,127		450,755
Financing Receivable Year Four Originated Three Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Five	367,162		367,162		471,362
Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, More Than Five Years	986,224		986,224		659,507
Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Revolving	276,999		276,999		249,536
Financing Receivable Revolving Writeoff			0
Financing Receivable, Revolving, Converted to Term Loan	16		16		20
Financing Receivable Revolving Converted to Term Writeoff			0
Total	4,083,134		4,083,134		3,845,017
Financing Receivable, Allowance for Credit Loss, Writeoff			0
Commercial [Member] | Services [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	707,494		707,494		822,287
Financing Receivable Year One Originated Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Two	560,342		560,342		507,219
Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Three	417,177		417,177		287,523
Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff			3,360
Financing Receivable, Originated, Year Four	250,676		250,676		196,711
Financing Receivable Year Four Originated Three Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Five	134,198		134,198		157,673
Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, More Than Five Years	729,544		729,544		702,823
Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Revolving	766,027		766,027		756,524
Financing Receivable Revolving Writeoff			1,577
Financing Receivable, Revolving, Converted to Term Loan	903		903		761
Financing Receivable Revolving Converted to Term Writeoff			0
Total	3,566,361		3,566,361		3,431,521
Financing Receivable, Allowance for Credit Loss, Writeoff			4,937
Commercial [Member] | General business [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	681,035		681,035		743,653
Financing Receivable Year One Originated Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Two	556,448		556,448		377,073
Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Three	273,203		273,203		199,600
Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff			4,598
Financing Receivable, Originated, Year Four	149,797		149,797		177,093
Financing Receivable Year Four Originated Three Years Before Current Fiscal Year Writeoff			2
Financing Receivable, Originated, Year Five	140,507		140,507		143,899
Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, More Than Five Years	327,556		327,556		289,277
Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff			17
Financing Receivable, Revolving	1,448,956		1,448,956		1,578,209
Financing Receivable Revolving Writeoff			14
Financing Receivable, Revolving, Converted to Term Loan	2,240		2,240		2,367
Financing Receivable Revolving Converted to Term Writeoff			10
Total	3,579,742		3,579,742		3,511,171
Financing Receivable, Allowance for Credit Loss, Writeoff			4,641
Commercial real estate [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	361,934		361,934		1,188,483
Financing Receivable Year One Originated Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Two	1,730,828		1,730,828		1,158,002
Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Three	1,211,773		1,211,773		552,616
Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Four	480,710		480,710		648,561
Financing Receivable Year Four Originated Three Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Five	563,165		563,165		247,625
Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, More Than Five Years	753,169		753,169		649,874
Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff			8,446
Financing Receivable, Revolving	139,721		139,721		161,616
Financing Receivable Revolving Writeoff			0
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Financing Receivable Revolving Converted to Term Writeoff			0
Total	5,241,300		5,241,300		4,606,777
Financing Receivable, Allowance for Credit Loss, Writeoff	2,238	0	8,446	269
Loans to individuals [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	482,294		482,294		609,400
Financing Receivable, Originated, Year Two	563,432		563,432		570,755
Financing Receivable, Originated, Year Three	520,970		520,970		560,186
Financing Receivable, Originated, Year Four	501,217		501,217		247,994
Financing Receivable, Originated, Year Five	199,262		199,262		131,036
Financing Receivable, Originated, More Than Five Years	576,966		576,966		684,939
Financing Receivable, Revolving	895,113		895,113		910,199
Financing Receivable, Revolving, Converted to Term Loan	23,625		23,625		23,365
Total	3,762,879		3,762,879		3,737,874
Financing Receivable, Allowance for Credit Loss, Writeoff	1,586	$ 1,691	4,285	$ 4,508
Loans to individuals [Member] | Residential mortgage [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	320,680		320,680		354,529
Financing Receivable Year One Originated Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Two	334,025		334,025		374,927
Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Three	351,267		351,267		395,948
Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff			51
Financing Receivable, Originated, Year Four	358,394		358,394		63,504
Financing Receivable Year Four Originated Three Years Before Current Fiscal Year Writeoff			4
Financing Receivable, Originated, Year Five	58,667		58,667		42,571
Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, More Than Five Years	272,952		272,952		281,290
Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff			14
Financing Receivable, Revolving	371,577		371,577		354,986
Financing Receivable Revolving Writeoff			1
Financing Receivable, Revolving, Converted to Term Loan	23,430		23,430		23,029
Financing Receivable Revolving Converted to Term Writeoff			0
Total	2,090,992		2,090,992		1,890,784
Financing Receivable, Allowance for Credit Loss, Writeoff			70
Loans to individuals [Member] | Residential mortgage [Member] | US Government Agency Insured Loans [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		289
Financing Receivable, Originated, Year Two	1,624		1,624		2,254
Financing Receivable, Originated, Year Three	2,030		2,030		9,299
Financing Receivable, Originated, Year Four	5,029		5,029		12,182
Financing Receivable, Originated, Year Five	7,128		7,128		19,563
Financing Receivable, Originated, More Than Five Years	145,281		145,281		202,353
Financing Receivable, Revolving	0		0		0
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	161,092		161,092		245,940
Loans to individuals [Member] | Personal [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	161,614		161,614		254,582
Financing Receivable Year One Originated Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Two	227,783		227,783		193,574
Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff			60
Financing Receivable, Originated, Year Three	167,673		167,673		154,939
Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff			40
Financing Receivable, Originated, Year Four	137,794		137,794		172,308
Financing Receivable Year Four Originated Three Years Before Current Fiscal Year Writeoff			41
Financing Receivable, Originated, Year Five	133,467		133,467		68,902
Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, More Than Five Years	158,733		158,733		201,296
Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff			4,042
Financing Receivable, Revolving	523,536		523,536		555,213
Financing Receivable Revolving Writeoff			26
Financing Receivable, Revolving, Converted to Term Loan	195		195		336
Financing Receivable Revolving Converted to Term Writeoff			6
Total	1,510,795		1,510,795		1,601,150
Financing Receivable, Allowance for Credit Loss, Writeoff			4,215
Performing [Member] | Commercial [Member] | Energy [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	192,614		192,614		157,745
Financing Receivable, Originated, Year Two	106,593		106,593		76,951
Financing Receivable, Originated, Year Three	45,795		45,795		30,284
Financing Receivable, Originated, Year Four	8,190		8,190		12,783
Financing Receivable, Originated, Year Five	10,463		10,463		5,992
Financing Receivable, Originated, More Than Five Years	12,518		12,518		4,980
Financing Receivable, Revolving	3,064,120		3,064,120		3,104,906
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	3,440,293		3,440,293		3,393,641
Performing [Member] | Commercial [Member] | Energy [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0
Financing Receivable, Originated, Year Two	0		0
Financing Receivable, Originated, Year Three	0		0
Financing Receivable, Originated, Year Four	0		0
Financing Receivable, Originated, Year Five	0		0
Financing Receivable, Originated, More Than Five Years	0		0
Financing Receivable, Revolving	13,950		13,950
Financing Receivable, Revolving, Converted to Term Loan	0		0
Total	13,950		13,950
Performing [Member] | Commercial [Member] | Energy [Member] | Accruing Substandard [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		0
Financing Receivable, Originated, Year Two	0		0		0
Financing Receivable, Originated, Year Three	0		0		0
Financing Receivable, Originated, Year Four	0		0		664
Financing Receivable, Originated, Year Five	0		0		385
Financing Receivable, Originated, More Than Five Years	0		0		683
Financing Receivable, Revolving	16,800		16,800		28,018
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	16,800		16,800		29,750
Performing [Member] | Commercial [Member] | Healthcare [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	485,617		485,617		932,097
Financing Receivable, Originated, Year Two	903,150		903,150		604,886
Financing Receivable, Originated, Year Three	573,317		573,317		476,854
Financing Receivable, Originated, Year Four	464,170		464,170		404,204
Financing Receivable, Originated, Year Five	338,944		338,944		464,989
Financing Receivable, Originated, More Than Five Years	947,581		947,581		618,163
Financing Receivable, Revolving	268,806		268,806		245,898
Financing Receivable, Revolving, Converted to Term Loan	16		16		20
Total	3,981,601		3,981,601		3,747,111
Performing [Member] | Commercial [Member] | Healthcare [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		0
Financing Receivable, Originated, Year Two	0		0		0
Financing Receivable, Originated, Year Three	18,719		18,719		0
Financing Receivable, Originated, Year Four	0		0		20,071
Financing Receivable, Originated, Year Five	2,421		2,421		0
Financing Receivable, Originated, More Than Five Years	18,072		18,072		18,859
Financing Receivable, Revolving	980		980		4
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	40,192		40,192		38,934
Performing [Member] | Commercial [Member] | Healthcare [Member] | Accruing Substandard [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		0
Financing Receivable, Originated, Year Two	589		589		0
Financing Receivable, Originated, Year Three	214		214		0
Financing Receivable, Originated, Year Four	6,957		6,957		0
Financing Receivable, Originated, Year Five	0		0		0
Financing Receivable, Originated, More Than Five Years	10,046		10,046		14,304
Financing Receivable, Revolving	1,700		1,700		3,634
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	19,506		19,506		17,938
Performing [Member] | Commercial [Member] | Services [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	707,494		707,494		821,785
Financing Receivable, Originated, Year Two	541,539		541,539		496,510
Financing Receivable, Originated, Year Three	412,450		412,450		286,085
Financing Receivable, Originated, Year Four	247,092		247,092		193,481
Financing Receivable, Originated, Year Five	131,269		131,269		156,736
Financing Receivable, Originated, More Than Five Years	723,365		723,365		696,300
Financing Receivable, Revolving	759,327		759,327		722,371
Financing Receivable, Revolving, Converted to Term Loan	870		870		639
Total	3,523,406		3,523,406		3,373,907
Performing [Member] | Commercial [Member] | Services [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		502
Financing Receivable, Originated, Year Two	13,051		13,051		5,139
Financing Receivable, Originated, Year Three	1,836		1,836		989
Financing Receivable, Originated, Year Four	1,531		1,531		771
Financing Receivable, Originated, Year Five	596		596		894
Financing Receivable, Originated, More Than Five Years	2,733		2,733		1,345
Financing Receivable, Revolving	1,421		1,421		8,668
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	21,168		21,168		18,308
Performing [Member] | Commercial [Member] | Services [Member] | Accruing Substandard [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		0
Financing Receivable, Originated, Year Two	5,752		5,752		0
Financing Receivable, Originated, Year Three	730		730		0
Financing Receivable, Originated, Year Four	1,716		1,716		2,459
Financing Receivable, Originated, Year Five	2,333		2,333		43
Financing Receivable, Originated, More Than Five Years	3,446		3,446		2,789
Financing Receivable, Revolving	4,957		4,957		17,665
Financing Receivable, Revolving, Converted to Term Loan	33		33		122
Total	18,967		18,967		23,078
Performing [Member] | Commercial [Member] | General business [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	667,802		667,802		725,894
Financing Receivable, Originated, Year Two	504,364		504,364		361,839
Financing Receivable, Originated, Year Three	262,660		262,660		198,274
Financing Receivable, Originated, Year Four	148,645		148,645		172,878
Financing Receivable, Originated, Year Five	140,220		140,220		139,140
Financing Receivable, Originated, More Than Five Years	319,113		319,113		283,694
Financing Receivable, Revolving	1,396,919		1,396,919		1,570,536
Financing Receivable, Revolving, Converted to Term Loan	2,196		2,196		2,329
Total	3,441,919		3,441,919		3,454,584
Performing [Member] | Commercial [Member] | General business [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	9,277		9,277		17,759
Financing Receivable, Originated, Year Two	15,059		15,059		13,065
Financing Receivable, Originated, Year Three	9,103		9,103		208
Financing Receivable, Originated, Year Four	1,115		1,115		71
Financing Receivable, Originated, Year Five	287		287		7
Financing Receivable, Originated, More Than Five Years	8,389		8,389		2,291
Financing Receivable, Revolving	7,959		7,959		7,094
Financing Receivable, Revolving, Converted to Term Loan	0		0		26
Total	51,189		51,189		40,521
Performing [Member] | Commercial [Member] | General business [Member] | Accruing Substandard [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	3,956		3,956		0
Financing Receivable, Originated, Year Two	37,025		37,025		2,169
Financing Receivable, Originated, Year Three	1,440		1,440		66
Financing Receivable, Originated, Year Four	37		37		4,130
Financing Receivable, Originated, Year Five	0		0		4,680
Financing Receivable, Originated, More Than Five Years	0		0		3,287
Financing Receivable, Revolving	37,693		37,693		94
Financing Receivable, Revolving, Converted to Term Loan	0		0		4
Total	80,151		80,151		14,430
Performing [Member] | Commercial real estate [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	361,934		361,934		1,188,483
Financing Receivable, Originated, Year Two	1,730,828		1,730,828		1,158,002
Financing Receivable, Originated, Year Three	1,211,694		1,211,694		552,616
Financing Receivable, Originated, Year Four	480,710		480,710		641,102
Financing Receivable, Originated, Year Five	555,902		555,902		247,625
Financing Receivable, Originated, More Than Five Years	723,783		723,783		633,304
Financing Receivable, Revolving	139,721		139,721		161,616
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	5,204,572		5,204,572		4,582,748
Performing [Member] | Commercial real estate [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0
Financing Receivable, Originated, Year Two	0		0
Financing Receivable, Originated, Year Three	0		0
Financing Receivable, Originated, Year Four	0		0
Financing Receivable, Originated, Year Five	0		0
Financing Receivable, Originated, More Than Five Years	19,212		19,212
Financing Receivable, Revolving	0		0
Financing Receivable, Revolving, Converted to Term Loan	0		0
Total	19,212		19,212
Performing [Member] | Commercial real estate [Member] | Accruing Substandard [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		0
Financing Receivable, Originated, Year Two	0		0		0
Financing Receivable, Originated, Year Three	79		79		0
Financing Receivable, Originated, Year Four	0		0		7,459
Financing Receivable, Originated, Year Five	0		0		0
Financing Receivable, Originated, More Than Five Years	10,019		10,019		0
Financing Receivable, Revolving	0		0		0
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	10,098		10,098		7,459
Performing [Member] | Loans to individuals [Member] | Residential mortgage [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	320,680		320,680		354,497
Financing Receivable, Originated, Year Two	332,368		332,368		373,190
Financing Receivable, Originated, Year Three	348,782		348,782		393,002
Financing Receivable, Originated, Year Four	354,284		354,284		63,142
Financing Receivable, Originated, Year Five	57,944		57,944		40,525
Financing Receivable, Originated, More Than Five Years	252,027		252,027		260,625
Financing Receivable, Revolving	366,136		366,136		352,126
Financing Receivable, Revolving, Converted to Term Loan	22,277		22,277		22,176
Total	2,054,498		2,054,498		1,859,283
Performing [Member] | Loans to individuals [Member] | Residential mortgage [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		0
Financing Receivable, Originated, Year Two	359		359		81
Financing Receivable, Originated, Year Three	262		262		42
Financing Receivable, Originated, Year Four	1,339		1,339		0
Financing Receivable, Originated, Year Five	0		0		142
Financing Receivable, Originated, More Than Five Years	152		152		388
Financing Receivable, Revolving	3,144		3,144		527
Financing Receivable, Revolving, Converted to Term Loan	88		88		87
Total	5,344		5,344		1,267
Performing [Member] | Loans to individuals [Member] | Residential mortgage [Member] | Accruing Substandard [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		0
Financing Receivable, Originated, Year Two	0		0		0
Financing Receivable, Originated, Year Three	0		0		187
Financing Receivable, Originated, Year Four	0		0		0
Financing Receivable, Originated, Year Five	0		0		0
Financing Receivable, Originated, More Than Five Years	45		45		138
Financing Receivable, Revolving	101		101		117
Financing Receivable, Revolving, Converted to Term Loan	51		51		1
Total	197		197		443
Performing [Member] | Loans to individuals [Member] | Residential mortgage [Member] | US Government Agency Insured Loans [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		289
Financing Receivable, Originated, Year Two	1,624		1,624		2,254
Financing Receivable, Originated, Year Three	2,030		2,030		9,000
Financing Receivable, Originated, Year Four	4,749		4,749		10,722
Financing Receivable, Originated, Year Five	6,752		6,752		17,244
Financing Receivable, Originated, More Than Five Years	135,502		135,502		191,426
Financing Receivable, Revolving	0		0		0
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	150,657		150,657		230,935
Performing [Member] | Loans to individuals [Member] | Personal [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	161,514		161,514		254,497
Financing Receivable, Originated, Year Two	227,726		227,726		193,095
Financing Receivable, Originated, Year Three	167,566		167,566		154,887
Financing Receivable, Originated, Year Four	137,761		137,761		172,114
Financing Receivable, Originated, Year Five	133,304		133,304		68,871
Financing Receivable, Originated, More Than Five Years	158,721		158,721		201,278
Financing Receivable, Revolving	523,513		523,513		549,187
Financing Receivable, Revolving, Converted to Term Loan	195		195		332
Total	1,510,300		1,510,300		1,594,261
Performing [Member] | Loans to individuals [Member] | Personal [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	100		100		47
Financing Receivable, Originated, Year Two	30		30		28
Financing Receivable, Originated, Year Three	103		103		40
Financing Receivable, Originated, Year Four	22		22		12
Financing Receivable, Originated, Year Five	2		2		17
Financing Receivable, Originated, More Than Five Years	0		0		0
Financing Receivable, Revolving	0		0		6,003
Financing Receivable, Revolving, Converted to Term Loan	0		0		4
Total	257		257		6,151
Performing [Member] | Loans to individuals [Member] | Personal [Member] | Accruing Substandard [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		0
Financing Receivable, Originated, Year Two	0		0		444
Financing Receivable, Originated, Year Three	0		0		0
Financing Receivable, Originated, Year Four	2		2		160
Financing Receivable, Originated, Year Five	157		157		0
Financing Receivable, Originated, More Than Five Years	0		0		0
Financing Receivable, Revolving	0		0		0
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	159		159		604
Nonperforming Financial Instruments [Member] | Commercial [Member] | Energy [Member] | Nonaccrual [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		0
Financing Receivable, Originated, Year Two	0		0		0
Financing Receivable, Originated, Year Three	0		0		0
Financing Receivable, Originated, Year Four	0		0		0
Financing Receivable, Originated, Year Five	0		0		0
Financing Receivable, Originated, More Than Five Years	108		108		159
Financing Receivable, Revolving	19,451		19,451		1,240
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	19,559		19,559		1,399
Nonperforming Financial Instruments [Member] | Commercial [Member] | Healthcare [Member] | Nonaccrual [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		0
Financing Receivable, Originated, Year Two	0		0		0
Financing Receivable, Originated, Year Three	0		0		0
Financing Receivable, Originated, Year Four	0		0		26,480
Financing Receivable, Originated, Year Five	25,797		25,797		6,373
Financing Receivable, Originated, More Than Five Years	10,525		10,525		8,181
Financing Receivable, Revolving	5,513		5,513		0
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	41,835		41,835		41,034
Nonperforming Financial Instruments [Member] | Commercial [Member] | Services [Member] | Nonaccrual [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		0
Financing Receivable, Originated, Year Two	0		0		5,570
Financing Receivable, Originated, Year Three	2,161		2,161		449
Financing Receivable, Originated, Year Four	337		337		0
Financing Receivable, Originated, Year Five	0		0		0
Financing Receivable, Originated, More Than Five Years	0		0		2,389
Financing Receivable, Revolving	322		322		7,820
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	2,820		2,820		16,228
Nonperforming Financial Instruments [Member] | Commercial [Member] | General business [Member] | Nonaccrual [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		0
Financing Receivable, Originated, Year Two	0		0		0
Financing Receivable, Originated, Year Three	0		0		1,052
Financing Receivable, Originated, Year Four	0		0		14
Financing Receivable, Originated, Year Five	0		0		72
Financing Receivable, Originated, More Than Five Years	54		54		5
Financing Receivable, Revolving	6,385		6,385		485
Financing Receivable, Revolving, Converted to Term Loan	44		44		8
Total	6,483		6,483		1,636
Nonperforming Financial Instruments [Member] | Commercial real estate [Member] | Nonaccrual [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		0
Financing Receivable, Originated, Year Two	0		0		0
Financing Receivable, Originated, Year Three	0		0		0
Financing Receivable, Originated, Year Four	0		0		0
Financing Receivable, Originated, Year Five	7,263		7,263		0
Financing Receivable, Originated, More Than Five Years	155		155		16,570
Financing Receivable, Revolving	0		0		0
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	7,418		7,418		16,570
Nonperforming Financial Instruments [Member] | Loans to individuals [Member] | Residential mortgage [Member] | Nonaccrual [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		32
Financing Receivable, Originated, Year Two	1,298		1,298		1,656
Financing Receivable, Originated, Year Three	2,223		2,223		2,717
Financing Receivable, Originated, Year Four	2,771		2,771		362
Financing Receivable, Originated, Year Five	723		723		1,904
Financing Receivable, Originated, More Than Five Years	20,728		20,728		20,139
Financing Receivable, Revolving	2,196		2,196		2,216
Financing Receivable, Revolving, Converted to Term Loan	1,014		1,014		765
Total	30,953		30,953		29,791
Nonperforming Financial Instruments [Member] | Loans to individuals [Member] | Residential mortgage [Member] | US Government Agency Insured Loans [Member] | Nonaccrual [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		0
Financing Receivable, Originated, Year Two	0		0		0
Financing Receivable, Originated, Year Three	0		0		299
Financing Receivable, Originated, Year Four	280		280		1,460
Financing Receivable, Originated, Year Five	376		376		2,319
Financing Receivable, Originated, More Than Five Years	9,779		9,779		10,927
Financing Receivable, Revolving	0		0		0
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	10,435		10,435		15,005
Nonperforming Financial Instruments [Member] | Loans to individuals [Member] | Personal [Member] | Nonaccrual [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		38
Financing Receivable, Originated, Year Two	27		27		7
Financing Receivable, Originated, Year Three	4		4		12
Financing Receivable, Originated, Year Four	9		9		22
Financing Receivable, Originated, Year Five	4		4		14
Financing Receivable, Originated, More Than Five Years	12		12		18
Financing Receivable, Revolving	23		23		23
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	$ 79		$ 79		$ 134

XML

Loans and Allowances for Credit Losses Loans and Allowances for Credit Losses, Nonaccrual (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	$ 119,585	$ 121,797
Financing Receivable, Nonaccrual, No Allowance	117,102	90,854
Financing Receivable, Nonaccrual, With Allowance	2,483	30,943
Financing Receivable, Nonaccrual, Related Allowance	1,646	5,570
Commercial [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	70,698	60,297
Financing Receivable, Nonaccrual, No Allowance	68,215	45,531
Financing Receivable, Nonaccrual, With Allowance	2,483	14,766
Financing Receivable, Nonaccrual, Related Allowance	1,646	4,020
Commercial [Member] | Energy [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	19,559	1,399
Financing Receivable, Nonaccrual, No Allowance	19,559	1,399
Financing Receivable, Nonaccrual, With Allowance	0	0
Financing Receivable, Nonaccrual, Related Allowance	0	0
Commercial [Member] | Healthcare [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	41,836	41,034
Financing Receivable, Nonaccrual, No Allowance	41,836	34,661
Financing Receivable, Nonaccrual, With Allowance	0	6,373
Financing Receivable, Nonaccrual, Related Allowance	0	946
Commercial [Member] | Services [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	2,820	16,228
Financing Receivable, Nonaccrual, No Allowance	337	7,835
Financing Receivable, Nonaccrual, With Allowance	2,483	8,393
Financing Receivable, Nonaccrual, Related Allowance	1,646	3,074
Commercial [Member] | General business [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	6,483	1,636
Financing Receivable, Nonaccrual, No Allowance	6,483	1,636
Financing Receivable, Nonaccrual, With Allowance	0	0
Financing Receivable, Nonaccrual, Related Allowance	0	0
Commercial real estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	7,418	16,570
Financing Receivable, Nonaccrual, No Allowance	7,418	393
Financing Receivable, Nonaccrual, With Allowance	0	16,177
Financing Receivable, Nonaccrual, Related Allowance	0	1,550
Loans to individuals [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	41,469	44,930
Financing Receivable, Nonaccrual, No Allowance	41,469	44,930
Financing Receivable, Nonaccrual, With Allowance	0	0
Financing Receivable, Nonaccrual, Related Allowance	0	0
Loans to individuals [Member] | Residential mortgage [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	30,954	29,791
Financing Receivable, Nonaccrual, No Allowance	30,954	29,791
Financing Receivable, Nonaccrual, With Allowance	0	0
Financing Receivable, Nonaccrual, Related Allowance	0	0
Loans to individuals [Member] | Personal [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	79	134
Financing Receivable, Nonaccrual, No Allowance	79	134
Financing Receivable, Nonaccrual, With Allowance	0	0
Financing Receivable, Nonaccrual, Related Allowance	0	0
US Government Agency Insured Loans [Member] | Loans to individuals [Member] | Residential mortgage [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	10,436	15,005
Financing Receivable, Nonaccrual, No Allowance	10,436	15,005
Financing Receivable, Nonaccrual, With Allowance	0	0
Financing Receivable, Nonaccrual, Related Allowance	$ 0	$ 0

XML

Loans and Allowances for Credit Losses, Modifications (Details) $ in Millions	9 Months Ended
	Sep. 30, 2023 USD ($)
Financing Receivable, Loan Modifications [Line Items]
Financing Receivable, Modified in Period, Amount	$ 136.0
Number of Days Past Due Following Modification to be Considered a Payment Default	30 days
Residential mortgage [Member] | Loans to individuals [Member]
Financing Receivable, Loan Modifications [Line Items]
Financing Receivable, Modified, Subsequent Default	$ 4.0
Healthcare [Member] | Commercial [Member]
Financing Receivable, Loan Modifications [Line Items]
Financing Receivable, Modified in Period, Amount	42.0
General business [Member] | Commercial [Member]
Financing Receivable, Loan Modifications [Line Items]
Financing Receivable, Modified in Period, Amount	81.0
Healthcare and General business member | Extended Maturity
Financing Receivable, Loan Modifications [Line Items]
Financing Receivable, Modified in Period, Amount	97.0
Healthcare and Loans to individuals member | Extended Maturity and Interest Rate Reduction
Financing Receivable, Loan Modifications [Line Items]
Financing Receivable, Modified in Period, Amount	38.0
US Government Agency Insured Loans [Member] | Residential mortgage [Member] | Loans to individuals [Member]
Financing Receivable, Loan Modifications [Line Items]
Financing Receivable, Modified in Period, Amount	$ 12.0

XML

Loans and Allowances for Credit Losses, By Aging Category (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	$ 47,734	$ 76,114
Current and Past Due Performing Loans	23,724,018	22,557,150
30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	42,047	55,039
60 to 89 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	20,748	51,614
90 Days or More [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	101,699	94,633
Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	23,559,524	22,355,864
Commercial [Member]
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	13	396
Current and Past Due Performing Loans	14,719,839	14,212,499
Commercial [Member] | 30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	646	7,255
Commercial [Member] | 60 to 89 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	436	30,365
Commercial [Member] | 90 Days or More [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	39,158	5,813
Commercial [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	14,679,599	14,169,066
Commercial [Member] | Energy [Member]
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	0	0
Current and Past Due Performing Loans	3,490,602	3,424,790
Commercial [Member] | Energy [Member] | 30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	0	24
Commercial [Member] | Energy [Member] | 60 to 89 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	0	0
Commercial [Member] | Energy [Member] | 90 Days or More [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	0	0
Commercial [Member] | Energy [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	3,490,602	3,424,766
Commercial [Member] | Healthcare [Member]
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	0	0
Current and Past Due Performing Loans	4,083,134	3,845,017
Commercial [Member] | Healthcare [Member] | 30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	10	5,914
Commercial [Member] | Healthcare [Member] | 60 to 89 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	0	26,480
Commercial [Member] | Healthcare [Member] | 90 Days or More [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	31,765	459
Commercial [Member] | Healthcare [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	4,051,359	3,812,164
Commercial [Member] | Services [Member]
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	0	0
Current and Past Due Performing Loans	3,566,361	3,431,521
Commercial [Member] | Services [Member] | 30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	599	1,060
Commercial [Member] | Services [Member] | 60 to 89 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	324	2,461
Commercial [Member] | Services [Member] | 90 Days or More [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	1,037	4,958
Commercial [Member] | Services [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	3,564,401	3,423,042
Commercial [Member] | General business [Member]
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	13	396
Current and Past Due Performing Loans	3,579,742	3,511,171
Commercial [Member] | General business [Member] | 30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	37	257
Commercial [Member] | General business [Member] | 60 to 89 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	112	1,424
Commercial [Member] | General business [Member] | 90 Days or More [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	6,356	396
Commercial [Member] | General business [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	3,573,237	3,509,094
Commercial real estate [Member]
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	0	0
Current and Past Due Performing Loans	5,241,300	4,606,777
Commercial real estate [Member] | 30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	0	531
Commercial real estate [Member] | 60 to 89 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	488	0
Commercial real estate [Member] | 90 Days or More [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	7,263	217
Commercial real estate [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	5,233,549	4,606,029
Loans to individuals [Member]
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	47,721	75,718
Current and Past Due Performing Loans	3,762,879	3,737,874
Loans to individuals [Member] | 30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	41,401	47,253
Loans to individuals [Member] | 60 to 89 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	19,824	21,249
Loans to individuals [Member] | 90 Days or More [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	55,278	88,603
Loans to individuals [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	3,646,376	3,580,769
Loans to individuals [Member] | Residential mortgage [Member]
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	51	114
Current and Past Due Performing Loans	2,090,992	1,890,784
Loans to individuals [Member] | Residential mortgage [Member] | 30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	9,713	10,632
Loans to individuals [Member] | Residential mortgage [Member] | 60 to 89 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	818	1,828
Loans to individuals [Member] | Residential mortgage [Member] | 90 Days or More [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	3,043	6,169
Loans to individuals [Member] | Residential mortgage [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	2,077,418	1,872,155
Loans to individuals [Member] | Residential mortgage [Member] | US Government Agency Insured Loans [Member]
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	47,670	75,604
Current and Past Due Performing Loans	161,092	245,940
Loans to individuals [Member] | Residential mortgage [Member] | US Government Agency Insured Loans [Member] | 30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	31,390	36,119
Loans to individuals [Member] | Residential mortgage [Member] | US Government Agency Insured Loans [Member] | 60 to 89 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	19,004	19,400
Loans to individuals [Member] | Residential mortgage [Member] | US Government Agency Insured Loans [Member] | 90 Days or More [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	52,212	82,402
Loans to individuals [Member] | Residential mortgage [Member] | US Government Agency Insured Loans [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	58,486	108,019
Loans to individuals [Member] | Personal [Member]
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	0	0
Current and Past Due Performing Loans	1,510,795	1,601,150
Loans to individuals [Member] | Personal [Member] | 30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	298	502
Loans to individuals [Member] | Personal [Member] | 60 to 89 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	2	21
Loans to individuals [Member] | Personal [Member] | 90 Days or More [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	23	32
Loans to individuals [Member] | Personal [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	$ 1,510,472	$ 1,600,595

XML

Mortgage Banking Activities, Components of Loans Held For Sale (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended		12 Months Ended
	Mar. 31, 2023	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Schedule of Residential Mortgage Loans Held For Sale [Line Items]
Residential mortgage loans held for sale, nonperforming		$ 0		$ 0
Number of days for past due for loan to be considered nonperforming (in days)		90 days		90 days
Credit losses recognized on residential mortgage loans held for sale		$ 0	$ 0
Components of Residential Mortgage Loans Held for Sale [Abstract]
Unpaid principal balance		71,304		$ 74,941
Residential mortgage loans held for sale, Fair value		69,653		73,938
Residential mortgage loans held for sale		$ 72,489		75,272
Residential Mortgage Loan Commitments [Member] | Not Designated as Hedging Instrument [Member]
Schedule of Residential Mortgage Loans Held For Sale [Line Items]
General number of days outstanding for residential mortgage commitments, minimum (in days)	60 days	60 days
General number of days outstanding for residential mortgage commitments, maximum (in days)	90 days	90 days
Components of Residential Mortgage Loans Held for Sale [Abstract]
Derivative, Notional Amount		$ 49,285		45,492
Derivative, Net fair value		$ 1,541		1,054
Forward sales contracts [Member] | Not Designated as Hedging Instrument [Member]
Schedule of Residential Mortgage Loans Held For Sale [Line Items]
General number of days for delivery of loans, for which the price is set by forward sales contracts, minimum (in days)		60 days
General number of days for delivery for loans, for which the price is set by forward sales contracts, maximum (in days)		90 days
Components of Residential Mortgage Loans Held for Sale [Abstract]
Derivative, Notional Amount		$ 102,529		109,469
Derivative, Net fair value		$ 1,295		$ 280

XML

Mortgage Banking Activities Mortgage Banking Activities, Mortgage Banking Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Mortgage Banking Revenue [Abstract]
Net realized gains (losses) on sale of mortgage loans	$ (1,631)	$ (1,072)	$ (3,658)	$ 8,969
Net change in unrealized loss on mortgage loans held for sale	(522)	(6,244)	(648)	(9,764)
Net change in the fair value of mortgage loan commitments	(288)	(3,174)	487	(5,474)
Net change in the fair value of forward sales contracts	554	8,084	1,015	8,414
Total production revenue (loss)	(1,887)	(2,406)	(2,804)	2,145
Servicing revenue	15,243	13,688	45,668	37,155
Total mortgage banking revenue	$ 13,356	$ 11,282	$ 42,864	$ 39,300

XML

Mortgage Banking Activities, Mortgage Servicing Rights (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Summary of Mortgage Servicing Rights [Abstract]
Number of residential mortgage loans serviced for others	116,941		116,941		110,541
Outstanding principal balance of residential mortgage loans serviced for others	$ 20,607,013,000		$ 20,607,013,000		$ 18,863,201,000
Weighted average interest rate	3.61%		3.61%		3.59%
Remaining term (in months)			282 months		283 months
Servicing Asset at Fair Value, Amount [Roll Forward]
Beginning balance	$ 304,722,000	$ 270,312,000	$ 277,608,000	$ 163,198,000	$ 163,198,000
Additions	3,154,000	4,841,000	9,757,000	15,810,000
Acquisitions	2,669,000	1,043,000	33,807,000	45,910,000
Changes due to principal payments	(7,202,000)	(8,960,000)	(21,031,000)	(24,277,000)
Change in fair value due to market assumption changes	8,039,000	16,570,000	11,241,000	83,165,000
Ending balance	$ 311,382,000	$ 283,806,000	$ 311,382,000	$ 283,806,000	$ 277,608,000
Servicing Assets at Fair Value, Assumptions Used to Estimate Fair Value [Abstract]
Discount rate - risk-free rate plus a market premium (in hundredths)			9.84%		9.51%
Prepayment rate - based upon loan interest rate, original term and loan type			7.15%		7.54%
Loan servicing costs - annually per loan based upon loan type, performing, minimum (in dollars per loan)			$ 69		$ 69
Loan servicing costs - annually per loan based upon loan type, performing, maximum (in dollars per loan)			94		94
Loan servicing costs - annually per loan based upon loan type, delinquent, minimum (in dollars per loan)			150		150
Loan servicing costs - annually per loan based upon loan type, delinquent, maximum (in dollars per loan)			500		500
Loan servicing costs - annually per loan based upon loan type, foreclosure, minimum (in dollars per loan)			875		875
Loan servicing costs - annually per loan based upon loan type, foreclosure, maximum (in dollars per loan)			$ 8,000		$ 8,000
Escrow earnings rate - indexed to rates paid on deposit accounts with comparable average life (in hundredths)			4.66%		4.06%
Primary secondary mortgage rate spread	105		105		105
Delinquency rate			2.00%		2.33%

XML

Commitments and Contingent Liabilities (Details)	9 Months Ended
	Sep. 30, 2023 USD ($)
Judicial Ruling [Member] | Misuse of Revenues Pledged to Municipal Bonds [Member]
Litigation Settlement [Abstract]
Disgorged fees	$ 1,067,721
Litigation Settlement, Amount Awarded to Other Party	$ 600,000
Pending Litigation [Member] | Misuse of Revenues Pledged to Municipal Bonds [Member]
Litigation Settlement [Abstract]
Loss Contingency, Number of Plaintiffs	2
Pending Litigation [Member] | Bank Participation in Fraudulent Sale of Securities by Principals [Member]
Litigation Settlement [Abstract]
Loss Contingency, Number of Plaintiffs	19
Outstanding principal accrued interest and other amounts upon sale of facilities securing payment of the bonds	$ 30,000,000
Principal amount of entered judgment against the principal individual and his wife	36,805,051
Pre-judgment interest amount of entered judgment against the principal individual and his wife	$ 10,937,831
Settled Litigation | Bank Participation in Fraudulent Sale of Securities by Principals [Member]
Litigation Settlement [Abstract]
Loss Contingency, Number of Plaintiffs	7

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Commitments and Contingent Liabilities Variable Interest Entities (Details) $ in Millions	Sep. 30, 2023 USD ($)
Other Assets [Member]
Variable Interest Entity [Line Items]
Amortization Method Qualified Affordable Housing Project Investments	$ 413
Other Liabilities [Member]
Variable Interest Entity [Line Items]
Qualified Affordable Housing Project Investments, Commitment	$ 104

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Shareholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
	Oct. 31, 2023	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Dividends declared (in dollars per share)		$ 0.54	$ 0.53	$ 1.62	$ 1.59
Schedule of Accumulated Other Income (Loss) [Abstract]
Balance, Beginning of Period				$ (836,955)	$ 72,371
Net change in unrealized gain (loss)		$ (135,614)	$ (412,084)	(171,977)	(1,293,661)
Transfer of net unrealized loss from AFS to investment securities					0
Interest revenue, Investment securities		14,912	21,675	46,996	24,130
Operating expense, Personnel					(3,483)
Loss (gain) on available for sale securities, net		0	(892)	3,010	(3,017)
Other comprehensive income, before income taxes		(120,702)	(394,784)	(121,971)	(1,276,031)
Federal and state income taxes		(28,389)	(92,467)	(29,941)	(298,715)
Other comprehensive income, net of income taxes		(92,313)	(302,317)	(92,030)	(977,316)
Balance, End of Period		(928,985)	(904,945)	(928,985)	(904,945)
Accumulated Net Unrealized Gain (Loss) on Available for Sale Securities [Member]
Schedule of Accumulated Other Income (Loss) [Abstract]
Balance, Beginning of Period				(664,618)	69,775
Net change in unrealized gain (loss)				(171,977)	(1,293,661)
Transfer of net unrealized loss from AFS to investment securities					267,509
Interest revenue, Investment securities				0	0
Operating expense, Personnel					0
Loss (gain) on available for sale securities, net				3,010	(3,017)
Other comprehensive income, before income taxes				(168,967)	(1,029,169)
Federal and state income taxes				(40,735)	(240,868)
Other comprehensive income, net of income taxes				(128,232)	(788,301)
Balance, End of Period		(792,850)	(718,526)	(792,850)	(718,526)
AOCI, Accumulated Gain (Loss), Debt Securities, Investment Securities Transferred from Available-for-sale, Parent
Schedule of Accumulated Other Income (Loss) [Abstract]
Balance, Beginning of Period				(172,337)	0
Net change in unrealized gain (loss)				0	0
Transfer of net unrealized loss from AFS to investment securities					(267,509)
Interest revenue, Investment securities				46,996	24,130
Operating expense, Personnel					0
Loss (gain) on available for sale securities, net				0	0
Other comprehensive income, before income taxes				46,996	(243,379)
Federal and state income taxes				10,794	(56,960)
Other comprehensive income, net of income taxes				36,202	(186,419)
Balance, End of Period		(136,135)	(186,419)	(136,135)	(186,419)
Accumulated Unrealized Gain (Loss) on Employee Benefit Plans [Member]
Schedule of Accumulated Other Income (Loss) [Abstract]
Balance, Beginning of Period				0	2,596
Net change in unrealized gain (loss)				0	0
Transfer of net unrealized loss from AFS to investment securities					0
Interest revenue, Investment securities				0	0
Operating expense, Personnel					(3,483)
Loss (gain) on available for sale securities, net				0	0
Other comprehensive income, before income taxes				0	(3,483)
Federal and state income taxes				0	(887)
Other comprehensive income, net of income taxes				0	(2,596)
Balance, End of Period		$ 0	$ 0	$ 0	$ 0
Subsequent Event [Member]
Dividends Payable, Date Declared	Oct. 31, 2023
Dividends declared (in dollars per share)	$ 0.55
Dividends Payable, Date to be Paid	Nov. 30, 2023
Dividends Payable, Date of Record	Nov. 15, 2023

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Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Numerator: [Abstract]
Net income attributable to BOK Financial Corp. shareholders	$ 134,495	$ 156,510	$ 448,171	$ 351,844
Less: Earnings allocated to participating securities	1,104	1,161	3,561	2,562
Numerator for basic earnings per share – income available to common shareholders	133,391	155,349	444,610	349,282
Effect of reallocating undistributed earnings of participating securities	0	0	0	0
Numerator for diluted earnings per share – income available to common shareholders	$ 133,391	$ 155,349	$ 444,610	$ 349,282
Denominator: [Abstract]
Weighted average shares outstanding (in shares)	66,090,988	67,503,041	66,484,557	67,902,592
Less: Participating securities included in weighted average shares (in shares)	542,681	499,842	529,263	492,803
Denominator for basic earnings per common share (in shares)	65,548,307	67,003,199	65,955,294	67,409,789
Dilutive effect of employee stock compensation plans (in shares)	0	1,424	0	1,433
Denominator for diluted earnings per common share (in shares)	65,548,307	67,004,623	65,955,294	67,411,222
Basic earnings per share	$ 2.04	$ 2.32	$ 6.74	$ 5.18
Diluted earnings per share	$ 2.04	$ 2.32	$ 6.74	$ 5.18

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Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information [Line Items]
Net interest revenue from external sources	$ 300,896	$ 316,325	$ 975,505	$ 858,754
Net interest revenue (expense) from internal sources	0	0	0	0
Net interest revenue	300,896	316,325	975,505	858,754
Net loans charged off and provisions for credit losses	7,000	15,000	40,000	15,000
Net interest revenue after provision for credit losses	293,896	301,325	935,505	843,754
Other operating revenue	198,152	189,698	585,066	446,171
Other operating expense	324,313	294,751	948,798	846,024
Net direct contribution	167,735	196,272	571,773	443,901
Gain (loss) on financial instruments, net	0	0	0	0
Change in fair value of mortgage servicing rights	0	0	0	0
Gain (loss) on repossessed assets, net	0	0	0	0
Corporate expense allocations	0	0	0	0
Net income before taxes	167,735	196,272	571,773	443,901
Federal and state income taxes	33,256	39,681	123,162	92,000
Net income	134,479	156,591	448,611	351,901
Net income (loss) attributable to non-controlling interests	(16)	81	440	57
Net income attributable to BOK Financial Corp. shareholders	134,495	156,510	448,171	351,844
Average assets	49,319,552	45,119,202	47,748,933	47,636,291
Operating Segments [Member] | Commercial [Member]
Segment Reporting Information [Line Items]
Net interest revenue from external sources	298,293	226,016	886,263	546,599
Net interest revenue (expense) from internal sources	(43,829)	(17,951)	(104,543)	(34,983)
Net interest revenue	254,464	208,065	781,720	511,616
Net loans charged off and provisions for credit losses	4,904	(526)	10,980	3,316
Net interest revenue after provision for credit losses	249,560	208,591	770,740	508,300
Other operating revenue	59,153	60,386	184,826	179,501
Other operating expense	81,751	75,490	232,364	210,012
Net direct contribution	226,962	193,487	723,202	477,789
Gain (loss) on financial instruments, net	(11)	4	162	(138)
Change in fair value of mortgage servicing rights	0	0	0	0
Gain (loss) on repossessed assets, net	(268)	(158)	999	(2,880)
Corporate expense allocations	17,834	16,438	56,956	49,285
Net income before taxes	208,849	176,895	667,407	425,486
Federal and state income taxes	50,919	42,761	161,992	103,711
Net income	157,930	134,134	505,415	321,775
Net income (loss) attributable to non-controlling interests	0	0	0	0
Net income attributable to BOK Financial Corp. shareholders	157,930	134,134	505,415	321,775
Average assets	28,849,597	28,890,429	28,396,982	29,324,596
Operating Segments [Member] | Consumer [Member]
Segment Reporting Information [Line Items]
Net interest revenue from external sources	11,386	17,482	50,360	51,183
Net interest revenue (expense) from internal sources	101,222	26,469	285,020	53,764
Net interest revenue	112,608	43,951	335,380	104,947
Net loans charged off and provisions for credit losses	(73)	1,408	2,240	3,716
Net interest revenue after provision for credit losses	112,681	42,543	333,140	101,231
Other operating revenue	30,716	30,186	93,603	94,236
Other operating expense	54,497	53,236	157,035	154,685
Net direct contribution	88,900	19,493	269,708	40,782
Gain (loss) on financial instruments, net	(9,183)	(21,395)	(24,113)	(95,150)
Change in fair value of mortgage servicing rights	8,039	16,570	11,241	83,165
Gain (loss) on repossessed assets, net	11	0	25	138
Corporate expense allocations	11,920	10,792	35,860	32,994
Net income before taxes	75,847	3,876	221,001	(4,059)
Federal and state income taxes	17,838	906	51,977	(950)
Net income	58,009	2,970	169,024	(3,109)
Net income (loss) attributable to non-controlling interests	0	0	0	0
Net income attributable to BOK Financial Corp. shareholders	58,009	2,970	169,024	(3,109)
Average assets	9,379,478	10,233,401	9,635,204	10,281,679
Operating Segments [Member] | Wealth Management [Member]
Segment Reporting Information [Line Items]
Net interest revenue from external sources	7,622	34,746	32,977	130,389
Net interest revenue (expense) from internal sources	28,815	(1,162)	106,918	(3,290)
Net interest revenue	36,437	33,584	139,895	127,099
Net loans charged off and provisions for credit losses	9	(22)	(60)	(153)
Net interest revenue after provision for credit losses	36,428	33,606	139,955	127,252
Other operating revenue	123,614	113,113	355,568	224,892
Other operating expense	89,367	79,151	256,265	230,166
Net direct contribution	70,675	67,568	239,258	121,978
Gain (loss) on financial instruments, net	0	0	0	0
Change in fair value of mortgage servicing rights	0	0	0	0
Gain (loss) on repossessed assets, net	0	0	0	0
Corporate expense allocations	14,331	12,934	39,265	37,508
Net income before taxes	56,344	54,634	199,993	84,470
Federal and state income taxes	13,315	12,826	47,200	19,897
Net income	43,029	41,808	152,793	64,573
Net income (loss) attributable to non-controlling interests	0	0	0	0
Net income attributable to BOK Financial Corp. shareholders	43,029	41,808	152,793	64,573
Average assets	14,740,641	13,818,299	13,128,925	17,320,779
Funds Management and Other [Member]
Segment Reporting Information [Line Items]
Net interest revenue from external sources	(16,405)	38,081	5,905	130,583
Net interest revenue (expense) from internal sources	(86,208)	(7,356)	(287,395)	(15,491)
Net interest revenue	(102,613)	30,725	(281,490)	115,092
Net loans charged off and provisions for credit losses	2,160	14,140	26,840	8,121
Net interest revenue after provision for credit losses	(104,773)	16,585	(308,330)	106,971
Other operating revenue	(15,331)	(13,987)	(48,931)	(52,458)
Other operating expense	98,698	86,874	303,134	251,161
Net direct contribution	(218,802)	(84,276)	(660,395)	(196,648)
Gain (loss) on financial instruments, net	9,194	21,391	23,951	95,288
Change in fair value of mortgage servicing rights	(8,039)	(16,570)	(11,241)	(83,165)
Gain (loss) on repossessed assets, net	257	158	(1,024)	2,742
Corporate expense allocations	(44,085)	(40,164)	(132,081)	(119,787)
Net income before taxes	(173,305)	(39,133)	(516,628)	(61,996)
Federal and state income taxes	(48,816)	(16,812)	(138,007)	(30,658)
Net income	(124,489)	(22,321)	(378,621)	(31,338)
Net income (loss) attributable to non-controlling interests	(16)	81	440	57
Net income attributable to BOK Financial Corp. shareholders	(124,473)	(22,402)	(379,061)	(31,395)
Average assets	$ (3,650,164)	$ (7,822,927)	$ (3,412,178)	$ (9,290,763)

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Fees and Commissions Revenue Fees and Commissions (Details) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Sep. 30, 2023		Sep. 30, 2022		Sep. 30, 2023		Sep. 30, 2022
Disaggregation of Revenue [Line Items]
Total fees and commissions	$ 197,852		$ 192,634		$ 584,328		$ 463,642
Fees and commissions revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	197,852		192,634		584,328		463,642
Fees and commission revenue not from contracts with customers	67,730	[1]	61,141	[2]	207,530	[3]	95,819	[4]
Fees and commissions revenue from contracts with customers	130,122	[5]	131,493	[6]	376,798	[7]	367,823	[8]
Brokerage and trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	62,312		61,006		179,714		77,970
Fees and commission revenue not from contracts with customers	45,138	[1]	45,632	[2]	138,703	[3]	37,117	[4]
Fees and commissions revenue from contracts with customers	17,174	[5]	15,374	[6]	41,011	[7]	40,853	[8]
Trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	34,460		26,463		98,979		(15,594)
Fees and commission revenue not from contracts with customers	34,460	[1]	26,463	[2]	98,979	[3]	(15,594)	[4]
Fees and commissions revenue from contracts with customers	0	[5]	0	[6]	0	[7]	0	[8]
Customer hedging revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	6,855		13,179		28,851		37,250
Fees and commission revenue not from contracts with customers	6,855	[1]	13,179	[2]	28,851	[3]	37,250	[4]
Fees and commissions revenue from contracts with customers	0	[5]	0	[6]	0	[7]	0	[8]
Retail brokerage revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	4,357		3,838		11,522		12,706
Fees and commission revenue not from contracts with customers	0	[1]	0	[2]	0	[3]	0	[4]
Fees and commissions revenue from contracts with customers	4,357	[5]	3,838	[6]	11,522	[7]	12,706	[8]
Insurance brokerage revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	2,703		3,254		8,866		9,810
Fees and commission revenue not from contracts with customers	0	[1]	0	[2]	0	[3]	0	[4]
Fees and commissions revenue from contracts with customers	2,703	[5]	3,254	[6]	8,866	[7]	9,810	[8]
Investment banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	13,937		14,272		31,496		33,798
Fees and commission revenue not from contracts with customers	3,823	[1]	5,990	[2]	10,873	[3]	15,461	[4]
Fees and commissions revenue from contracts with customers	10,114	[5]	8,282	[6]	20,623	[7]	18,337	[8]
Transaction card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	26,387		25,974		78,011		77,130
Fees and commission revenue not from contracts with customers	0	[1]	0	[2]	0	[3]	0	[4]
Fees and commissions revenue from contracts with customers	26,387	[5]	25,974	[6]	78,011	[7]	77,130	[8]
TransFund EFT network revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	21,896		22,136		64,663		62,421
Fees and commission revenue not from contracts with customers	0	[1]	0	[2]	0	[3]	0	[4]
Fees and commissions revenue from contracts with customers	21,896	[5]	22,136	[6]	64,663	[7]	62,421	[8]
Merchant services revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	2,438		1,925		7,100		9,453
Fees and commission revenue not from contracts with customers	0	[1]	0	[2]	0	[3]	0	[4]
Fees and commissions revenue from contracts with customers	2,438	[5]	1,925	[6]	7,100	[7]	9,453	[8]
Corporate card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	2,053		1,913		6,248		5,256
Fees and commission revenue not from contracts with customers	0	[1]	0	[2]	0	[3]	0	[4]
Fees and commissions revenue from contracts with customers	2,053	[5]	1,913	[6]	6,248	[7]	5,256	[8]
Fiduciary and asset management revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	52,256		50,190		155,910		146,427
Fees and commission revenue not from contracts with customers	0	[1]	0	[2]	0	[3]	0	[4]
Fees and commissions revenue from contracts with customers	52,256	[5]	50,190	[6]	155,910	[7]	146,427	[8]
Personal trust revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	22,889		23,927		71,731		73,551
Fees and commission revenue not from contracts with customers	0	[1]	0	[2]	0	[3]	0	[4]
Fees and commissions revenue from contracts with customers	22,889	[5]	23,927	[6]	71,731	[7]	73,551	[8]
Corporate trust revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	8,713		6,513		23,574		16,947
Fees and commission revenue not from contracts with customers	0	[1]	0	[2]	0	[3]	0	[4]
Fees and commissions revenue from contracts with customers	8,713	[5]	6,513	[6]	23,574	[7]	16,947	[8]
Institutional trust & retirement plan services revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	16,883		13,018		43,843		39,009
Fees and commission revenue not from contracts with customers	0	[1]	0	[2]	0	[3]	0	[4]
Fees and commissions revenue from contracts with customers	16,883	[5]	13,018	[6]	43,843	[7]	39,009	[8]
Investment management services and other revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	3,771		6,732		16,762		16,920
Fees and commission revenue not from contracts with customers	0	[1]	0	[2]	0	[3]	0	[4]
Fees and commissions revenue from contracts with customers	3,771	[5]	6,732	[6]	16,762	[7]	16,920	[8]
Deposit service charges and fees [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	27,676		28,703		80,744		84,207
Fees and commission revenue not from contracts with customers	0	[1]	0	[2]	0	[3]	0	[4]
Fees and commissions revenue from contracts with customers	27,676	[5]	28,703	[6]	80,744	[7]	84,207	[8]
Commercial account service charge revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	14,709		14,314		42,936		43,191
Fees and commission revenue not from contracts with customers	0	[1]	0	[2]	0	[3]	0	[4]
Fees and commissions revenue from contracts with customers	14,709	[5]	14,314	[6]	42,936	[7]	43,191	[8]
Overdraft fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	5,492		6,987		15,506		19,829
Fees and commission revenue not from contracts with customers	0	[1]	0	[2]	0	[3]	0	[4]
Fees and commissions revenue from contracts with customers	5,492	[5]	6,987	[6]	15,506	[7]	19,829	[8]
Check card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	5,928		5,942		17,542		17,502
Fees and commission revenue not from contracts with customers	0	[1]	0	[2]	0	[3]	0	[4]
Fees and commissions revenue from contracts with customers	5,928	[5]	5,942	[6]	17,542	[7]	17,502	[8]
Automated service charge and other deposit fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	1,547		1,460		4,760		3,685
Fees and commission revenue not from contracts with customers	0	[1]	0	[2]	0	[3]	0	[4]
Fees and commissions revenue from contracts with customers	1,547	[5]	1,460	[6]	4,760	[7]	3,685	[8]
Mortgage banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	13,356		11,282		42,864		39,300
Fees and commission revenue not from contracts with customers	13,356	[1]	11,282	[2]	42,864	[3]	39,300	[4]
Fees and commissions revenue from contracts with customers	0	[5]	0	[6]	0	[7]	0	[8]
Mortgage production revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	(1,887)		(2,406)		(2,804)		2,145
Fees and commission revenue not from contracts with customers	(1,887)	[1]	(2,406)	[2]	(2,804)	[3]	2,145	[4]
Fees and commissions revenue from contracts with customers	0	[5]	0	[6]	0	[7]	0	[8]
Mortgage servicing revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	15,243		13,688		45,668		37,155
Fees and commission revenue not from contracts with customers	15,243	[1]	13,688	[2]	45,668	[3]	37,155	[4]
Fees and commissions revenue from contracts with customers	0	[5]	0	[6]	0	[7]	0	[8]
Other revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	15,865		15,479		47,085		38,608
Fees and commission revenue not from contracts with customers	9,236	[1]	4,227	[2]	25,963	[3]	19,402	[4]
Fees and commissions revenue from contracts with customers	6,629	[5]	11,252	[6]	21,122	[7]	19,206	[8]
Operating Segments [Member] | Commercial [Member] | Fees and commissions revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	57,858		58,147		173,397		174,992
Operating Segments [Member] | Commercial [Member] | Brokerage and trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	11,911		14,517		38,449		45,663
Operating Segments [Member] | Commercial [Member] | Trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Operating Segments [Member] | Commercial [Member] | Customer hedging revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	7,403		8,169		26,729		28,888
Operating Segments [Member] | Commercial [Member] | Retail brokerage revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Operating Segments [Member] | Commercial [Member] | Insurance brokerage revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Operating Segments [Member] | Commercial [Member] | Investment banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	4,508		6,348		11,720		16,775
Operating Segments [Member] | Commercial [Member] | Transaction card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	25,236		24,871		74,481		73,869
Operating Segments [Member] | Commercial [Member] | TransFund EFT network revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	21,038		21,243		62,020		59,763
Operating Segments [Member] | Commercial [Member] | Merchant services revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	2,430		1,917		7,074		9,425
Operating Segments [Member] | Commercial [Member] | Corporate card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	1,768		1,711		5,387		4,681
Operating Segments [Member] | Commercial [Member] | Fiduciary and asset management revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Operating Segments [Member] | Commercial [Member] | Personal trust revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Operating Segments [Member] | Commercial [Member] | Corporate trust revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Operating Segments [Member] | Commercial [Member] | Institutional trust & retirement plan services revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Operating Segments [Member] | Commercial [Member] | Investment management services and other revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Operating Segments [Member] | Commercial [Member] | Deposit service charges and fees [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	13,998		13,591		40,794		40,617
Operating Segments [Member] | Commercial [Member] | Commercial account service charge revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	13,687		13,361		39,922		40,283
Operating Segments [Member] | Commercial [Member] | Overdraft fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	26		29		83		89
Operating Segments [Member] | Commercial [Member] | Check card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Operating Segments [Member] | Commercial [Member] | Automated service charge and other deposit fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	285		201		789		245
Operating Segments [Member] | Commercial [Member] | Mortgage banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Operating Segments [Member] | Commercial [Member] | Mortgage production revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Operating Segments [Member] | Commercial [Member] | Mortgage servicing revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Operating Segments [Member] | Commercial [Member] | Other revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	6,713		5,168		19,673		14,843
Operating Segments [Member] | Consumer [Member] | Fees and commissions revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	30,715		30,230		93,657		94,308
Operating Segments [Member] | Consumer [Member] | Brokerage and trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Operating Segments [Member] | Consumer [Member] | Trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Operating Segments [Member] | Consumer [Member] | Customer hedging revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Operating Segments [Member] | Consumer [Member] | Retail brokerage revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Operating Segments [Member] | Consumer [Member] | Insurance brokerage revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Operating Segments [Member] | Consumer [Member] | Investment banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Operating Segments [Member] | Consumer [Member] | Transaction card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	883		918		2,716		2,736
Operating Segments [Member] | Consumer [Member] | TransFund EFT network revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	875		910		2,690		2,708
Operating Segments [Member] | Consumer [Member] | Merchant services revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	8		8		26		28
Operating Segments [Member] | Consumer [Member] | Corporate card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Operating Segments [Member] | Consumer [Member] | Fiduciary and asset management revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Operating Segments [Member] | Consumer [Member] | Personal trust revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Operating Segments [Member] | Consumer [Member] | Corporate trust revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Operating Segments [Member] | Consumer [Member] | Institutional trust & retirement plan services revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Operating Segments [Member] | Consumer [Member] | Investment management services and other revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Operating Segments [Member] | Consumer [Member] | Deposit service charges and fees [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	13,132		14,558		38,215		41,940
Operating Segments [Member] | Consumer [Member] | Commercial account service charge revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	524		473		1,553		1,392
Operating Segments [Member] | Consumer [Member] | Overdraft fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	5,427		6,936		15,321		19,673
Operating Segments [Member] | Consumer [Member] | Check card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	5,926		5,944		17,540		17,502
Operating Segments [Member] | Consumer [Member] | Automated service charge and other deposit fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	1,255		1,205		3,801		3,373
Operating Segments [Member] | Consumer [Member] | Mortgage banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	13,974		11,800		44,608		40,795
Operating Segments [Member] | Consumer [Member] | Mortgage production revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	(1,887)		(2,406)		(2,804)		2,145
Operating Segments [Member] | Consumer [Member] | Mortgage servicing revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	15,861		14,206		47,412		38,650
Operating Segments [Member] | Consumer [Member] | Other revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	2,726		2,954		8,118		8,837
Operating Segments [Member] | Wealth Management [Member] | Fees and commissions revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	123,614		113,113		355,575		224,907
Operating Segments [Member] | Wealth Management [Member] | Brokerage and trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	50,808		41,737		138,943		25,325
Operating Segments [Member] | Wealth Management [Member] | Trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	34,461		26,463		98,980		(15,594)
Operating Segments [Member] | Wealth Management [Member] | Customer hedging revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	(141)		257		(200)		1,379
Operating Segments [Member] | Wealth Management [Member] | Retail brokerage revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	4,357		3,839		11,522		12,707
Operating Segments [Member] | Wealth Management [Member] | Insurance brokerage revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	2,703		3,254		8,866		9,810
Operating Segments [Member] | Wealth Management [Member] | Investment banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	9,428		7,924		19,775		17,023
Operating Segments [Member] | Wealth Management [Member] | Transaction card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	161		80		488		221
Operating Segments [Member] | Wealth Management [Member] | TransFund EFT network revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	(18)		(19)		(52)		(55)
Operating Segments [Member] | Wealth Management [Member] | Merchant services revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Operating Segments [Member] | Wealth Management [Member] | Corporate card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	179		99		540		276
Operating Segments [Member] | Wealth Management [Member] | Fiduciary and asset management revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	52,255		50,276		155,931		146,557
Operating Segments [Member] | Wealth Management [Member] | Personal trust revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	22,890		23,927		71,732		73,551
Operating Segments [Member] | Wealth Management [Member] | Corporate trust revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	8,713		6,513		23,574		16,947
Operating Segments [Member] | Wealth Management [Member] | Institutional trust & retirement plan services revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	16,883		13,019		43,843		39,009
Operating Segments [Member] | Wealth Management [Member] | Investment management services and other revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	3,769		6,817		16,782		17,050
Operating Segments [Member] | Wealth Management [Member] | Deposit service charges and fees [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	545		553		1,734		1,644
Operating Segments [Member] | Wealth Management [Member] | Commercial account service charge revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	496		480		1,461		1,516
Operating Segments [Member] | Wealth Management [Member] | Overdraft fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	39		19		101		63
Operating Segments [Member] | Wealth Management [Member] | Check card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Operating Segments [Member] | Wealth Management [Member] | Automated service charge and other deposit fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	10		54		172		65
Operating Segments [Member] | Wealth Management [Member] | Mortgage banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Operating Segments [Member] | Wealth Management [Member] | Mortgage production revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Operating Segments [Member] | Wealth Management [Member] | Mortgage servicing revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Operating Segments [Member] | Wealth Management [Member] | Other revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	19,845		20,467		58,479		51,160
Funds Management and Other [Member] | Fees and commissions revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	(14,335)		(8,856)		(38,301)		(30,565)
Funds Management and Other [Member] | Brokerage and trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	(407)		4,752		2,322		6,982
Funds Management and Other [Member] | Trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	(1)		0		(1)		0
Funds Management and Other [Member] | Customer hedging revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	(407)		4,753		2,322		6,983
Funds Management and Other [Member] | Retail brokerage revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		(1)		0		(1)
Funds Management and Other [Member] | Insurance brokerage revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Funds Management and Other [Member] | Investment banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	1		0		1		0
Funds Management and Other [Member] | Transaction card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	107		105		326		304
Funds Management and Other [Member] | TransFund EFT network revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	1		2		5		5
Funds Management and Other [Member] | Merchant services revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Funds Management and Other [Member] | Corporate card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	106		103		321		299
Funds Management and Other [Member] | Fiduciary and asset management revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	1		(86)		(21)		(130)
Funds Management and Other [Member] | Personal trust revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	(1)		0		(1)		0
Funds Management and Other [Member] | Corporate trust revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Funds Management and Other [Member] | Institutional trust & retirement plan services revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		(1)		0		0
Funds Management and Other [Member] | Investment management services and other revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	2		(85)		(20)		(130)
Funds Management and Other [Member] | Deposit service charges and fees [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	1		1		1		6
Funds Management and Other [Member] | Commercial account service charge revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	2		0		0		0
Funds Management and Other [Member] | Overdraft fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		3		1		4
Funds Management and Other [Member] | Check card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	2		(2)		2		0
Funds Management and Other [Member] | Automated service charge and other deposit fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	(3)		0		(2)		2
Funds Management and Other [Member] | Mortgage banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	(618)		(518)		(1,744)		(1,495)
Funds Management and Other [Member] | Mortgage production revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Funds Management and Other [Member] | Mortgage servicing revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	(618)		(518)		(1,744)		(1,495)
Funds Management and Other [Member] | Other revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	$ (13,419)		$ (13,110)		$ (39,185)		$ (36,232)

[1] Out of scope revenue generally relates to financial instruments or contractual rights and obligations within the scope of other applicable accounting guidance.

[2] Out of scope revenue generally relates to financial instruments or contractual rights and obligations within the scope of other applicable accounting guidance.

[3] Out of scope revenue generally relates to financial instruments or contractual rights and obligations within the scope of other applicable accounting guidance.

[4] Out of scope revenue generally relates to financial instruments or contractual rights and obligations within the scope of other applicable accounting guidance.

[5] In scope revenue represents revenue subject to FASB ASC Topic 606, Revenue from Contracts with Customers.

[6] In scope revenue represents revenue subject to FASB ASC Topic 606, Revenue from Contracts with Customers.

[7] In scope revenue represents revenue subject to FASB ASC Topic 606, Revenue from Contracts with Customers.

[8] In scope revenue represents revenue subject to FASB ASC Topic 606, Revenue from Contracts with Customers.

XML

Fair Value Measurements, Fair Value Of Financial Instruments as Measured On a Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2023		Jun. 30, 2023	Dec. 31, 2022		Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
Assets: [Abstract]
Trading securities	$ 4,748,101			$ 4,464,161
Available for sale securities	11,906,647			11,493,860
Fair value option securities	20,215			296,590
Mortgage servicing rights	311,382		$ 304,722	277,608		$ 283,806	$ 270,312	$ 163,198
Derviative contracts, net of cash collateral, Assets, Fair value	546,109			880,343
Liabilities: [Abstract]
Derivative contracts, net of cash collateral, Liabilities, Fair Value	403,947			554,900
U.S. government securities [Member]
Assets: [Abstract]
Trading securities	18,843			9,823
Residential agency mortgage-backed securities [Member]
Assets: [Abstract]
Trading securities	4,653,161			4,406,848
Available for sale securities	6,216,955			5,814,496
Fair value option securities	20,215			296,590
Municipal securities [Member]
Assets: [Abstract]
Trading securities	51,998			21,484
Available for sale securities	488,269			624,500
U.S. Treasury [Member]
Assets: [Abstract]
Available for sale securities	897			898
Residential non-agency mortgage-backed securities [Member]
Assets: [Abstract]
Available for sale securities	715,806			577,576
Commercial agency mortgage-backed securities [Member]
Assets: [Abstract]
Available for sale securities	4,484,247			4,475,917
Other debt securities [Member]
Assets: [Abstract]
Trading securities	24,099			26,006
Available for sale securities	473			473
Fair Value, Recurring [Member]
Assets: [Abstract]
Trading securities	4,748,101			4,464,161
Available for sale securities	11,906,647			11,493,860
Residential mortgage loans held for sale	72,489	[1]		75,272	[2]
Mortgage servicing rights	311,382	[3]		277,608	[4]
Derviative contracts, net of cash collateral, Assets, Fair value	546,109			880,343
Liabilities: [Abstract]
Derivative contracts, net of cash collateral, Liabilities, Fair Value	403,947			554,900
Fair Value, Recurring [Member] | U.S. government securities [Member]
Assets: [Abstract]
Trading securities	18,843			9,823
Fair Value, Recurring [Member] | Residential agency mortgage-backed securities [Member]
Assets: [Abstract]
Trading securities	4,653,161			4,406,848
Available for sale securities	6,216,955			5,814,496
Fair value option securities	20,215			296,590
Fair Value, Recurring [Member] | Municipal securities [Member]
Assets: [Abstract]
Trading securities	51,998			21,484
Available for sale securities	488,269			624,500
Fair Value, Recurring [Member] | Other trading securities
Assets: [Abstract]
Trading securities	24,099			26,006
Fair Value, Recurring [Member] | U.S. Treasury [Member]
Assets: [Abstract]
Available for sale securities	897			898
Fair Value, Recurring [Member] | Residential non-agency mortgage-backed securities [Member]
Assets: [Abstract]
Available for sale securities	715,806			577,576
Fair Value, Recurring [Member] | Commercial agency mortgage-backed securities [Member]
Assets: [Abstract]
Available for sale securities	4,484,247			4,475,917
Fair Value, Recurring [Member] | Other debt securities [Member]
Assets: [Abstract]
Available for sale securities	473			473
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets: [Abstract]
Trading securities	17,932			4,970
Available for sale securities	897			898
Residential mortgage loans held for sale	0	[1]		0	[2]
Mortgage servicing rights	0	[3]		0	[4]
Derviative contracts, net of cash collateral, Assets, Fair value	1,596			2,110
Liabilities: [Abstract]
Derivative contracts, net of cash collateral, Liabilities, Fair Value	190			16
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | U.S. government securities [Member]
Assets: [Abstract]
Trading securities	17,932			4,970
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Residential agency mortgage-backed securities [Member]
Assets: [Abstract]
Trading securities	0			0
Available for sale securities	0			0
Fair value option securities	0			0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Municipal securities [Member]
Assets: [Abstract]
Trading securities	0			0
Available for sale securities	0			0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Other trading securities
Assets: [Abstract]
Trading securities	0			0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | U.S. Treasury [Member]
Assets: [Abstract]
Available for sale securities	897			898
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Residential non-agency mortgage-backed securities [Member]
Assets: [Abstract]
Available for sale securities	0			0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Commercial agency mortgage-backed securities [Member]
Assets: [Abstract]
Available for sale securities	0			0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Other debt securities [Member]
Assets: [Abstract]
Available for sale securities	0			0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets: [Abstract]
Trading securities	4,730,169			4,459,191
Available for sale securities	11,905,277			11,492,489
Residential mortgage loans held for sale	65,179	[1]		68,054	[2]
Mortgage servicing rights	0	[3]		0	[4]
Derviative contracts, net of cash collateral, Assets, Fair value	544,513			878,233
Liabilities: [Abstract]
Derivative contracts, net of cash collateral, Liabilities, Fair Value	403,757			554,884
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | U.S. government securities [Member]
Assets: [Abstract]
Trading securities	911			4,853
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Residential agency mortgage-backed securities [Member]
Assets: [Abstract]
Trading securities	4,653,161			4,406,848
Available for sale securities	6,216,955			5,814,496
Fair value option securities	20,215			296,590
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Municipal securities [Member]
Assets: [Abstract]
Trading securities	51,998			21,484
Available for sale securities	488,269			624,500
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Other trading securities
Assets: [Abstract]
Trading securities	24,099			26,006
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | U.S. Treasury [Member]
Assets: [Abstract]
Available for sale securities	0			0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Residential non-agency mortgage-backed securities [Member]
Assets: [Abstract]
Available for sale securities	715,806			577,576
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Commercial agency mortgage-backed securities [Member]
Assets: [Abstract]
Available for sale securities	4,484,247			4,475,917
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Other debt securities [Member]
Assets: [Abstract]
Available for sale securities	0			0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets: [Abstract]
Trading securities	0			0
Available for sale securities	473			473
Residential mortgage loans held for sale	7,310	[1]		7,218	[2]
Mortgage servicing rights	311,382	[3]		277,608	[4]
Derviative contracts, net of cash collateral, Assets, Fair value	$ 0			$ 0
Liquidity Discount on Mortgage Loans Qualifying for Sale to US Govt Agencies	78.46%			77.55%
Liabilities: [Abstract]
Derivative contracts, net of cash collateral, Liabilities, Fair Value	$ 0			$ 0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | U.S. government securities [Member]
Assets: [Abstract]
Trading securities	0			0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Residential agency mortgage-backed securities [Member]
Assets: [Abstract]
Trading securities	0			0
Available for sale securities	0			0
Fair value option securities	0			0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Municipal securities [Member]
Assets: [Abstract]
Trading securities	0			0
Available for sale securities				0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Other trading securities
Assets: [Abstract]
Trading securities	0			0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | U.S. Treasury [Member]
Assets: [Abstract]
Available for sale securities	0			0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Residential non-agency mortgage-backed securities [Member]
Assets: [Abstract]
Available for sale securities	0			0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Commercial agency mortgage-backed securities [Member]
Assets: [Abstract]
Available for sale securities	0			0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Other debt securities [Member]
Assets: [Abstract]
Available for sale securities	$ 473			$ 473

[1] Residential mortgage loans held for sale measured at fair value on a recurring basis using significant unobservable inputs (Level 3) consist of residential mortgage loans intended for sale to U.S. government agencies that fail to meet conforming standards and are valued at 78.46% of the unpaid principal balance.

[2] Residential mortgage loans held for sale measured at fair value on a recurring basis using significant unobservable inputs (Level 3) consist of residential mortgage loans intended for sale to U.S. government agencies that fail to meet conforming standards and are valued at 77.55% of the unpaid principal balance.

[3] A reconciliation of the beginning and ending fair value of mortgage servicing rights and disclosures of significant assumptions used to determine fair value are presented in Note 5, Mortgage Banking Activities.3See Note 3 for detail of fair value of derivative contracts by contract type. Derivative contracts in asset and liability positions that were valued based on quoted prices in active markets for identical instruments (Level 1) are primarily exchange-traded interest rate derivative contracts held for trading purposes.

[4] A reconciliation of the beginning and ending fair value of mortgage servicing rights and disclosures of significant assumptions used to determine fair value are presented in Note 5, Mortgage Banking Activities.3See Note 3 for detail of fair value of derivative contracts by contract type. Derivative contracts in asset and liability positions that were valued based on quoted prices in active markets for identical instruments (Level 1) are primarily exchange-traded interest rate derivative contracts held for trading purposes.

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Fair Value Measurements, Fair Value Measured On a Nonrecurring Basis (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other gains (losses), net	$ 1,474	$ 979	$ 16,343	$ (8,304)
Fair Value, Nonrecurring [Member] | Nonaccruing Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross charge-offs against allowance for loan losses	2,135	22	4,932	499
Other gains (losses), net	0	0	0	0
Fair Value, Nonrecurring [Member] | Real estate and other repossessed assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross charge-offs against allowance for loan losses		0		0
Other gains (losses), net		0		(5,705)
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | Nonaccruing Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	0	0	0	0
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | Real estate and other repossessed assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		0		0
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] | Nonaccruing Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	$ 0	159	$ 0	159
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] | Real estate and other repossessed assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		$ 649		$ 649

XML

Fair Value Measurements Fair Value Measurement, Measured On Non-Recurring Basis, Signfiicant Unobservable Inputs, Quantitative Information (Details) - Fair Value, Nonrecurring [Member] - Fair Value, Inputs, Level 3 [Member] - USD ($) $ in Thousands	Sep. 30, 2023		Sep. 30, 2022
Discounted Cash Flow [Member] | Nonaccruing Loans [Member] | Management knowledge of Industry and non-real estate collateral including but not limited to recoverable oil and gas reserves, forward-looking commodity prices, estimated operating costs [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure			$ 126
Discounted Cash Flow [Member] | Nonaccruing Loans [Member] | Management knowledge of industry and non-real estate collateral
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure	$ 796
Discounted Cash Flow [Member] | Real estate and other repossessed assets [Member] | Management knowledge of industry and non-real estate collateral
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure			$ 1,699
Minimum [Member] | Nonaccruing Loans [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value of Impaired Loans as Percentage of Unpaid Principal Balance	12.00%	[1]	25.00%	[2]
Maximum [Member] | Nonaccruing Loans [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value of Impaired Loans as Percentage of Unpaid Principal Balance	14.00%	[1]	25.00%	[2]
Weighted Average [Member] | Nonaccruing Loans [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value of Impaired Loans as Percentage of Unpaid Principal Balance	14.00%	[1]	25.00%	[2]

[1] Represents fair value as a percentage of the unpaid principal balance.

[2] Represents fair value as a percentage of the unpaid principal balance.

XML

Fair Value Measurements, Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2023		Jun. 30, 2023	Dec. 31, 2022		Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	$ 4,748,101			$ 4,464,161
Debt Securities, Held-to-maturity, gross	2,476,759			2,739,241
Investment securities, Allowance for Credit Loss	(344)	[1]		(558)	[2]
Investment Securities, Amortized Cost, After Allowance for Credit Loss	2,476,415			2,738,683
Available for sale securities	11,906,647			11,493,860
Fair value option securities	20,215			296,590
Residential mortgage loans held for sale	72,489			75,272
Loans	23,724,018			22,557,150
Allowance for loan losses	(272,114)			(235,704)
Loans, net of allowance	23,451,904			22,321,446
Mortgage servicing rights	311,382		$ 304,722	277,608		$ 283,806	$ 270,312	$ 163,198
Derviative contracts, net of cash collateral, Assets, Fair value	546,109			880,343
Time deposits	2,927,217			1,461,842
Subordinated debentures	131,152			131,205
Derivative contracts, net of cash collateral, Liabilities, Fair Value	403,947			554,900
Commercial [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	14,719,839			14,212,499
Allowance for loan losses	(137,931)			(131,586)
Commercial real estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	5,241,300			4,606,777
Allowance for loan losses	(88,428)			(57,648)
Loans to individuals [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	3,762,879			3,737,874
Allowance for loan losses	(45,755)			(46,470)
U.S. government securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	18,843			9,823
Residential agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	4,653,161			4,406,848
Debt Securities, Held-to-maturity, gross	2,322,710			2,538,565
Available for sale securities	6,216,955			5,814,496
Fair value option securities	20,215			296,590
Municipal securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	51,998			21,484
Debt Securities, Held-to-maturity, gross	121,003			170,629
Available for sale securities	488,269			624,500
U.S. Treasury [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	897			898
Residential non-agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	715,806			577,576
Commercial agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Securities, Held-to-maturity, gross	17,258			17,259
Available for sale securities	4,484,247			4,475,917
Other debt securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	24,099			26,006
Debt Securities, Held-to-maturity, gross	15,788			12,788
Available for sale securities	473			473
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	854,161			943,810
Interest-bearing cash and cash equivalents	520,774			457,906
Trading securities	4,748,101			4,464,161
Debt Securities, Held-to-maturity, gross	2,298,762			2,514,245
Investment securities, Allowance for Credit Loss	(344)			(558)
Investment Securities, Amortized Cost, After Allowance for Credit Loss	2,298,418			2,513,687
Available for sale securities	11,906,647			11,493,860
Residential mortgage loans held for sale	72,489			75,272
Loans	23,724,018			22,557,150
Allowance for loan losses	(272,114)			(235,704)
Loans, net of allowance	23,451,904			22,321,446
Mortgage servicing rights	311,382			277,608
Derviative contracts, net of cash collateral, Assets, Fair value	546,109			880,343
Deposits with no stated maturity	30,725,335			33,018,863
Time deposits	2,927,217			1,461,842
Other borrowed funds	8,924,642			7,007,285
Subordinated debentures	131,152			131,205
Derivative contracts, net of cash collateral, Liabilities, Fair Value	403,947			554,900
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Commercial [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	14,719,839			14,212,499
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Commercial real estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	5,241,300			4,606,777
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Loans to individuals [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	3,762,879			3,737,874
Carrying (Reported) Amount, Fair Value Disclosure [Member] | U.S. government securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	18,843			9,823
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Residential agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	4,653,161			4,406,848
Debt Securities, Held-to-maturity, gross	2,146,133			2,315,219
Available for sale securities	6,216,955			5,814,496
Fair value option securities	20,215			296,590
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Municipal securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	51,998			21,484
Debt Securities, Held-to-maturity, gross	121,003			170,629
Available for sale securities	488,269			624,500
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Other trading securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	24,099			26,006
Carrying (Reported) Amount, Fair Value Disclosure [Member] | U.S. Treasury [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	897			898
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Residential non-agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	715,806			577,576
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Commercial agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Securities, Held-to-maturity, gross	15,838			15,609
Available for sale securities	4,484,247			4,475,917
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Other debt securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Securities, Held-to-maturity, gross	15,788			12,788
Available for sale securities	473			473
Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	854,161			943,810
Interest-bearing cash and cash equivalents	520,774			457,906
Trading securities	4,748,101			4,464,161
Debt Securities, Held-to-maturity, gross	2,052,367			2,346,768
Investment securities, Allowance for Credit Loss	0			0
Investment Securities, Amortized Cost, After Allowance for Credit Loss	2,052,367			2,346,768
Available for sale securities	11,906,647			11,493,860
Residential mortgage loans held for sale	72,489			75,272
Loans	23,210,626			21,891,223
Allowance for loan losses	0			0
Loans, net of allowance	23,210,626			21,891,223
Mortgage servicing rights	311,382			277,608
Derviative contracts, net of cash collateral, Assets, Fair value	546,109			880,343
Deposits with no stated maturity	30,725,335			33,018,863
Time deposits	2,986,307			1,431,245
Other borrowed funds	8,922,567			7,005,305
Subordinated debentures	116,911			121,497
Derivative contracts, net of cash collateral, Liabilities, Fair Value	403,947			554,900
Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	14,603,075			13,905,765
Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial real estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	5,094,865			4,454,048
Estimate of Fair Value, Fair Value Disclosure [Member] | Loans to individuals [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	3,512,686			3,531,410
Estimate of Fair Value, Fair Value Disclosure [Member] | U.S. government securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	18,843			9,823
Estimate of Fair Value, Fair Value Disclosure [Member] | Residential agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	4,653,161			4,406,848
Debt Securities, Held-to-maturity, gross	1,901,143			2,143,360
Available for sale securities	6,216,955			5,814,496
Fair value option securities	20,215			296,590
Estimate of Fair Value, Fair Value Disclosure [Member] | Municipal securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	51,998			21,484
Debt Securities, Held-to-maturity, gross	122,695			176,621
Available for sale securities	488,269			624,500
Estimate of Fair Value, Fair Value Disclosure [Member] | Other trading securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	24,099			26,006
Estimate of Fair Value, Fair Value Disclosure [Member] | U.S. Treasury [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	897			898
Estimate of Fair Value, Fair Value Disclosure [Member] | Residential non-agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	715,806			577,576
Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Securities, Held-to-maturity, gross	14,371			14,588
Available for sale securities	4,484,247			4,475,917
Estimate of Fair Value, Fair Value Disclosure [Member] | Other debt securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Securities, Held-to-maturity, gross	14,158			12,199
Available for sale securities	473			473
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	854,161			943,810
Interest-bearing cash and cash equivalents	520,774			457,906
Trading securities	17,932			4,970
Debt Securities, Held-to-maturity, gross	0			0
Investment securities, Allowance for Credit Loss	0			0
Investment Securities, Amortized Cost, After Allowance for Credit Loss	0			0
Available for sale securities	897			898
Residential mortgage loans held for sale	0			0
Loans	0			0
Allowance for loan losses	0			0
Loans, net of allowance	0			0
Mortgage servicing rights	0			0
Derviative contracts, net of cash collateral, Assets, Fair value	1,596			2,110
Deposits with no stated maturity	0			0
Time deposits	0			0
Other borrowed funds	0			0
Subordinated debentures	0			0
Derivative contracts, net of cash collateral, Liabilities, Fair Value	190			16
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	0			0
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial real estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	0			0
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Loans to individuals [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	0			0
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | U.S. government securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	17,932			4,970
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Residential agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0			0
Debt Securities, Held-to-maturity, gross	0			0
Available for sale securities	0			0
Fair value option securities	0			0
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Municipal securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0			0
Debt Securities, Held-to-maturity, gross	0			0
Available for sale securities	0			0
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Other trading securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0			0
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | U.S. Treasury [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	897			898
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Residential non-agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	0			0
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Securities, Held-to-maturity, gross	0			0
Available for sale securities	0			0
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Other debt securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Securities, Held-to-maturity, gross	0			0
Available for sale securities	0			0
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	0			0
Interest-bearing cash and cash equivalents	0			0
Trading securities	4,730,169			4,459,191
Debt Securities, Held-to-maturity, gross	1,941,629			2,208,253
Investment securities, Allowance for Credit Loss	0			0
Investment Securities, Amortized Cost, After Allowance for Credit Loss	1,941,629			2,208,253
Available for sale securities	11,905,277			11,492,489
Residential mortgage loans held for sale	65,179			68,054
Loans	0			0
Allowance for loan losses	0			0
Loans, net of allowance	0			0
Mortgage servicing rights	0			0
Derviative contracts, net of cash collateral, Assets, Fair value	544,513			878,233
Deposits with no stated maturity	0			0
Time deposits	0			0
Other borrowed funds	0			0
Subordinated debentures	116,911			121,497
Derivative contracts, net of cash collateral, Liabilities, Fair Value	403,757			554,884
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	0			0
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial real estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	0			0
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Loans to individuals [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	0			0
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | U.S. government securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	911			4,853
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Residential agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	4,653,161			4,406,848
Debt Securities, Held-to-maturity, gross	1,901,143			2,143,360
Available for sale securities	6,216,955			5,814,496
Fair value option securities	20,215			296,590
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Municipal securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	51,998			21,484
Debt Securities, Held-to-maturity, gross	11,957			38,106
Available for sale securities	488,269			624,500
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Other trading securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	24,099			26,006
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | U.S. Treasury [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	0			0
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Residential non-agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	715,806			577,576
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Securities, Held-to-maturity, gross	14,371			14,588
Available for sale securities	4,484,247			4,475,917
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Other debt securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Securities, Held-to-maturity, gross	14,158			12,199
Available for sale securities	0			0
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	0			0
Interest-bearing cash and cash equivalents	0			0
Trading securities	0			0
Debt Securities, Held-to-maturity, gross	110,738			138,515
Investment securities, Allowance for Credit Loss	0			0
Investment Securities, Amortized Cost, After Allowance for Credit Loss	110,738			138,515
Available for sale securities	473			473
Residential mortgage loans held for sale	7,310			7,218
Loans	23,210,626			21,891,223
Allowance for loan losses	0			0
Loans, net of allowance	23,210,626			21,891,223
Mortgage servicing rights	311,382			277,608
Derviative contracts, net of cash collateral, Assets, Fair value	0			0
Deposits with no stated maturity	30,725,335			33,018,863
Time deposits	2,986,307			1,431,245
Other borrowed funds	8,922,567			7,005,305
Subordinated debentures	0			0
Derivative contracts, net of cash collateral, Liabilities, Fair Value	0			0
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	14,603,075			13,905,765
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial real estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	5,094,865			4,454,048
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Loans to individuals [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	3,512,686			3,531,410
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | U.S. government securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0			0
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Residential agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0			0
Debt Securities, Held-to-maturity, gross	0			0
Available for sale securities	0			0
Fair value option securities	0			0
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Municipal securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0			0
Debt Securities, Held-to-maturity, gross	110,738			138,515
Available for sale securities	0			0
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Other trading securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0			0
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | U.S. Treasury [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	0			0
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Residential non-agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	0			0
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Securities, Held-to-maturity, gross	0			0
Available for sale securities	0			0
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Other debt securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Securities, Held-to-maturity, gross	0			0
Available for sale securities	$ 473			$ 473

[1] Carrying value includes $178 million of net unrealized loss which remains in Accumulated other comprehensive income ("AOCI") in the Consolidated Balance Sheets related to certain securities transferred during the second quarter of 2022 from the Available for Sale securities portfolio to the Investment securities portfolio.

[2] Carrying value includes $225 million of net unrealized loss which remains in AOCI in the Consolidated Balance Sheets related to certain securities transferred during the second quarter of 2022 from the Available for Sale securities portfolio to the Investment securities portfolio.