BOK Financial (BOKF) 10-Q 31 Jul 24 2024 Q2 Quarterly report Financial data

Document And Entity Information

Document And Entity Information	6 Months Ended
	Jun. 30, 2024 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	64,127,824
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q2
Document Type	10-Q
Entity File Number	001-37811
Amendment Flag	false
Document Period End Date	Jun. 30, 2024
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

Consolidated Statements of Earn

Consolidated Statements of Earnings (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Interest revenue [Abstract]
Loans	$ 447,114	$ 399,182	$ 885,791	$ 767,052
Residential mortgage loans held for sale	1,348	1,092	2,271	2,071
Trading securities	74,801	47,821	143,038	81,830
Investment securities	7,564	8,586	15,393	17,514
Available for sale securities	123,828	94,589	237,316	183,325
Fair value option securities	194	3,116	389	7,009
Restricted equity securities	9,192	6,429	18,050	12,237
Interest-bearing cash and cash equivalents	7,776	9,552	14,781	16,058
Total interest revenue	671,817	570,367	1,317,029	1,087,096
Interest expense [Abstract]
Deposits	254,753	136,666	496,877	231,940
Borrowed funds	118,737	109,221	225,941	176,259
Subordinated debentures	2,306	2,219	4,618	4,288
Total interest expense	375,796	248,106	727,436	412,487
Net interest income	296,021	322,261	589,593	674,609
Provision for credit losses	8,000	17,000	16,000	33,000
Net interest income after provision for credit losses	288,021	305,261	573,593	641,609
Total fees and commissions	200,027	200,497	400,591	386,476
Other gains, net	57,375	12,618	61,644	14,869
Loss on derivatives, net	(1,091)	(8,159)	(9,724)	(9,503)
Loss on fair value option securities, net	(94)	(2,158)	(399)	(5,120)
Change in fair value of mortgage servicing rights	3,453	9,261	14,430	3,202
Gain (loss) on available for sale securities, net	34	(3,010)	(45,137)	(3,010)
Total other operating revenue	259,704	209,049	421,405	386,914
Noninterest Expense [Abstract]
Personnel	191,090	190,652	393,743	372,797
Business promotion	8,250	7,640	16,228	16,209
Charitable contributions to BOKF Foundation	13,610	1,142	13,610	1,142
Professional fees and services	13,331	12,777	25,341	25,825
Net occupancy and equipment	30,245	30,105	60,538	58,564
FDIC and other insurance	7,317	6,974	16,057	14,289
FDIC special assessment	1,190	0	7,644	0
Data processing and communications	46,131	45,307	91,695	90,109
Printing, postage and supplies	3,789	3,728	7,786	7,621
Amortization of intangible assets	2,898	3,474	5,901	6,865
Mortgage banking costs	8,532	8,300	14,887	14,082
Other expense	10,307	8,574	23,644	16,982
Total other operating expense	336,690	318,673	677,074	624,485
Net income before taxes	211,035	195,637	317,924	404,038
Federal and state income taxes	47,303	44,001	70,498	89,906
Net income	163,732	151,636	247,426	314,132
Net income attributable to non-controlling interests	19	328	10	456
Net income attributable to BOK Financial Corporation shareholders	$ 163,713	$ 151,308	$ 247,416	$ 313,676
Earnings Per Share [Abstract]
Basic	$ 2.54	$ 2.27	$ 3.83	$ 4.70
Diluted	$ 2.54	$ 2.27	$ 3.83	$ 4.70
Average shares used in computation: [Abstract]
Basic	63,714,204	65,994,132	64,002,154	66,162,048
Diluted	63,714,204	65,994,132	64,002,154	66,162,048
Dividends declared per share	$ 0.55	$ 0.54	$ 1.10	$ 1.08
Brokerage and trading revenue [Member]
Total fees and commissions	$ 53,017	$ 65,006	$ 112,196	$ 117,402
Transaction card revenue [Member]
Total fees and commissions	27,246	26,003	52,739	51,624
Fiduciary and asset management revenue [Member]
Total fees and commissions	57,576	52,997	112,881	103,654
Deposit service charges and fees [Member]
Total fees and commissions	29,572	27,100	58,257	53,068
Mortgage banking revenue [Member]
Total fees and commissions	18,628	15,141	37,595	29,508
Other revenue [Member]
Total fees and commissions	$ 13,988	$ 14,250	$ 26,923	$ 31,220

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 163,732	$ 151,636	$ 247,426	$ 314,132
Other Comprehensive Income (Loss), before Tax [Abstract]
Net change in unrealized gain (loss)	(5,943)	(160,408)	(77,749)	(36,363)
Reclassification Adjustments Included in Earnings [Abstract]
Interest revenue, Investment securities	12,027	16,033	24,210	32,084
Loss (gain) on available for sale securities, net	(34)	3,010	45,137	3,010
Other comprehensive income (loss) before income taxes	6,050	(141,365)	(8,402)	(1,269)
Federal and state income taxes	1,424	(33,247)	(2,000)	(1,552)
Other comprehensive income (loss), net of income taxes	4,626	(108,118)	(6,402)	283
Comprehensive income	168,358	43,518	241,024	314,415
Comprehensive income attributable to non-controlling interests	19	328	10	456
Comprehensive income attributable to BOK Financial Corporation shareholders	$ 168,339	$ 43,190	$ 241,014	$ 313,959

Consolidated Balance Sheets (Un

Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Assets [Abstract]
Cash and due from banks	$ 897,811	$ 947,613
Interest-bearing cash and cash equivalents	178,352	400,652
Trading securities	5,212,791	5,193,505
Investment securities, net of allowance	2,128,881	2,244,153
Available for sale securities	12,793,784	12,286,681
Fair value option securities	19,050	20,671
Restricted equity securities	475,209	423,099
Residential mortgage loans held for sale	107,465	56,935
Loans	24,553,581	23,904,968
Allowance for loan losses	(287,826)	(277,123)
Loans, net of allowance	24,265,755	23,627,845
Premises and equipment, net	632,388	622,223
Receivables	334,019	317,922
Goodwill	1,044,749	1,044,749
Intangible assets, net	54,028	59,979
Mortgage servicing rights	333,246	293,884
Real estate and other repossessed assets, net of allowance	2,334	2,875
Derivative contracts, net	225,076	410,304
Cash surrender value of bank-owned life insurance	412,278	409,548
Receivable on unsettled securities sales	14,673	391,910
Other assets	1,271,568	1,070,282
Total assets	50,403,457	49,824,830
Deposits [Abstract]
Non-interest bearing demand deposits	8,840,178	9,196,493
Interest-bearing deposits: [Abstract]
Transaction	23,107,042	20,964,101
Savings	830,489	847,085
Time	3,463,935	3,012,022
Total deposits	36,241,644	34,019,701
Funds purchased and repurchase agreements	813,758	1,122,748
Other borrowings	6,528,538	7,701,552
Subordinated debentures	131,156	131,150
Accrued interest, taxes and expense	305,839	338,996
Derivative contracts, net	287,509	587,473
Due on unsettled securities purchases	347,663	254,057
Other liabilities	515,380	523,734
Total liabilities	45,171,487	44,679,411
Shareholders' equity: [Abstract]
Common stock	5	5
Capital surplus	1,416,807	1,406,745
Retained earnings	5,387,949	5,211,512
Treasury stock	(970,129)	(876,720)
Accumulated other comprehensive income (loss)	(605,502)	(599,100)
Total shareholders' equity	5,229,130	5,142,442
Non-controlling interests	2,840	2,977
Total equity	5,231,970	5,145,419
Total liabilities and equity	$ 50,403,457	$ 49,824,830

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Investment securities [Abstract]
Investment Securities, Fair Value	$ 1,924,532	$ 2,072,586
Real estate and other repossessed assets, allowance	$ (5,355)	$ (5,355)
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	(76,822,776)	(76,593,292)
Common Stock, Shares, Outstanding	(76,822,776)	(76,593,292)
Treasury stock, shares at cost (in shares)	12,694,952	11,626,115

Consolidated Statements of Chan

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, 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	314,132			313,676			313,676	456
Other comprehensive income (loss)	283					283	283
Repurchase of common stock (in shares)					713
Repurchase of common stock	(67,066)				$ (67,066)		(67,066)
Non-vested shares awarded, net (in shares)		169
Vesting of non-vested shares (in shares)					45
Vesting of non-vested shares	(4,695)				$ (4,695)		(4,695)
Share-based compensation	11,114		11,114				11,114
Cash dividends on common stock	(72,107)			(72,107)			(72,107)
Capital calls and distributions, net	(1,622)							(1,622)
Balance, end of period (in shares) at Jun. 30, 2023		76,592			10,223
Balance, end 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
Balance, beginning of period (in shares) at Mar. 31, 2023		76,556			9,955
Balance, beginning of period at Mar. 31, 2023	4,878,027	$ 5	1,397,096	4,950,176	$ (743,937)	(728,554)	4,874,786	3,241
Net income	151,636			151,308			151,308	328
Other comprehensive income (loss)	(108,118)					(108,118)	(108,118)
Repurchase of common stock (in shares)					266
Repurchase of common stock	(22,590)				$ (22,590)		(22,590)
Non-vested shares awarded, net (in shares)		36
Vesting of non-vested shares (in shares)					2
Vesting of non-vested shares	(194)				$ (194)		(194)
Share-based compensation	4,413		4,413				4,413
Cash dividends on common stock	(35,751)			(35,751)			(35,751)
Capital calls and distributions, net	(26)							(26)
Balance, end of period (in shares) at Jun. 30, 2023		76,592			10,223
Balance, end 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
Balance, beginning of period (in shares) at Dec. 31, 2023		76,593			11,626
Balance, beginning of period at Dec. 31, 2023	5,145,419	$ 5	1,406,745	5,211,512	$ (876,720)	(599,100)	5,142,442	2,977
Net income	247,426			247,416			247,416	10
Other comprehensive income (loss)	(6,402)					(6,402)	(6,402)
Repurchase of common stock (in shares)					1,029
Repurchase of common stock	(89,779)				$ (89,779)		(89,779)
Non-vested shares awarded, net (in shares)		230
Vesting of non-vested shares (in shares)					40
Vesting of non-vested shares	(3,630)				$ (3,630)		(3,630)
Share-based compensation	10,062		10,062				10,062
Cash dividends on common stock	(70,979)			(70,979)			(70,979)
Capital calls and distributions, net	(147)							(147)
Balance, end of period (in shares) at Jun. 30, 2024		76,823			12,695
Balance, end of period at Jun. 30, 2024	5,231,970	$ 5	1,416,807	5,387,949	$ (970,129)	(605,502)	5,229,130	2,840
Balance, beginning of period (in shares) at Mar. 31, 2024		76,793			12,278
Balance, beginning of period at Mar. 31, 2024	5,131,635	$ 5	1,411,293	5,259,646	$ (932,065)	(610,128)	5,128,751	2,884
Net income	163,732			163,713			163,713	19
Other comprehensive income (loss)	4,626					4,626	4,626
Repurchase of common stock (in shares)					412
Repurchase of common stock	(37,626)				$ (37,626)		(37,626)
Non-vested shares awarded, net (in shares)		30
Vesting of non-vested shares (in shares)					5
Vesting of non-vested shares	(438)				$ (438)		(438)
Share-based compensation	5,514		5,514				5,514
Cash dividends on common stock	(35,410)			(35,410)			(35,410)
Capital calls and distributions, net	(63)							(63)
Balance, end of period (in shares) at Jun. 30, 2024		76,823			12,695
Balance, end of period at Jun. 30, 2024	$ 5,231,970	$ 5	$ 1,416,807	$ 5,387,949	$ (970,129)	$ (605,502)	$ 5,229,130	$ 2,840

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash Flows From Operating Activities: [Abstract]
Net income	$ 247,426	$ 314,132
Adjustments to reconcile net income to net cash used in operating activities: [Abstract]
Provision for credit losses	16,000	33,000
Change in fair value of mortgage servicing rights due to market assumption changes	(14,430)	(3,202)
Change in the fair value of mortgage servicing rights due to principal payments	13,459	13,829
Net unrealized (gains) losses from derivative contracts	(108,051)	(25,310)
Share-based compensation	10,062	11,114
Depreciation and amortization	52,076	56,583
Net amortization of discounts and premiums	(20,111)	(8,733)
Net losses (gains) on financial instruments and other losses (gains), net	(16,615)	(11,617)
Net loss (gain) on mortgage loans held for sale	(4,613)	2,153
Mortgage loans originated for sale	(379,214)	(353,409)
Proceeds from sale of mortgage loans held for sale	334,578	332,944
Capitalized mortgage servicing rights	(6,970)	(6,603)
Charitable contributions to BOKF Foundation	13,610	0
Change in trading and fair value option securities	(17,671)	(893,843)
Change in receivables	264,352	(82,491)
Change in other assets	69,808	44,365
Change in other liabilities	189,069	17,318
Net cash provided by (used in) operating activities	642,765	(559,770)
Cash Flows From Investing Activities: [Abstract]
Proceeds from maturities or redemptions of investment securities	113,747	140,043
Proceeds from maturities or redemptions of available for sale securities	940,442	656,703
Purchases of investment securities	0	2,504
Purchases of available for sale securities	(2,244,168)	(1,266,764)
Proceeds from sales of available for sale securities	737,830	135,489
Change in amount receivable on unsettled available for sale securities transactions	95,997	(10,548)
Loans originated, net of principal collected	(651,931)	(678,700)
Net proceeds from derivative asset contracts	15,651	156,205
Net change in restricted equity securities	(52,110)	(30,435)
Proceeds from disposition of assets	12,600	29,136
Purchases of assets	(87,269)	(97,875)
Net cash provided by (used in) investing activities	(1,119,211)	(969,250)
Cash Flows From Financing Activities: [Abstract]
Net change in demand deposits, transaction deposits and savings accounts	1,770,030	(2,430,397)
Net change in time deposits	451,913	1,244,535
Net change in other borrowed funds	(1,490,267)	2,208,867
Net payments on derivative liability contracts	(20,415)	(151,457)
Net change in derivative margin accounts	(188,326)	707,266
Change in amount due on unsettled available for sale securities transactions	(154,203)	139,688
Issuance of common and treasury stock, net	(3,630)	(4,695)
Repurchase of common stock	(89,779)	(67,066)
Dividends paid	(70,979)	(72,107)
Net cash provided by (used in) financing activities	204,344	1,574,634
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	(272,102)	45,614
Cash and cash equivalents at beginning of period	1,348,265	1,401,716
Cash and cash equivalents at end of period	1,076,163	1,447,330
Supplemental Cash Flow Information: [Abstract]
Cash paid for interest	742,708	401,187
Cash paid for taxes	39,008	123,821
Net loans and bank premises transferred to repossessed real estate and other assets	77	225
Residential mortgage loans guaranteed by U.S. government agencies that became eligible for repurchase during the period	8,263	7,768
Conveyance of other real estate owned guaranteed by U.S. government agencies	1,840	2,569
Right-of-use assets obtained in exchange for operating lease liabilities	$ 18,236	$ 64,899

Significant Accounting Policies

Significant Accounting Policies	6 Months Ended
	Jun. 30, 2024
Accounting Policies [Abstract]
Significant Accounting Policies [Text Block]	Significant Accounting Policies Basis of Presentation The accompanying unaudited consolidated financial statements of BOK Financial 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, BOK Financial Securities, Inc. and BOK Financial Private Wealth, Inc. Operating divisions of BOKF, NA 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 2023 Form 10-K filed with the Securities and Exchange Commission, which contains audited financial statements. Amounts presented as of December 31, 2023 have been derived from the audited financial statements included in BOK Financial's 2023 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 three and six-month periods ended June 30, 2024 are not necessarily indicative of the results that may be expected for the year ending December 31, 2024. Newly Adopted and Pending Accounting Policies Financial Accounting Standards Board FASB ASU 2023-01, Leases (Topic 842): Common Control Arrangements 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 did not have a material impact on the Company's financial statements. FASB ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures The FASB issued ASU 2023-07 on November 27, 2023 which is intended to improve reportable segment disclosure requirements. Under previous guidance, while entities were required to disclose segment revenue and measure of profit or loss, there has been limited disclosure around the reporting of segment expenses. In addition to enhanced disclosures about significant segment expenses, the amendments enhance interim disclosure requirements, clarify circumstances in which an entity can disclose multiple segment measures of profit or loss, provide new segment disclosure requirements for entities with a single reportable segment, and contain other disclosure requirements. The purpose of the amendments is to enable investors to better understand an entity’s overall performance and assess potential future cash flows. ASU 2023-07 is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. The Company is evaluating the requirements of the expanded segment disclosures but does not expect the additional disclosures to have a material impact on the reported segment information. FASB ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures The FASB issued ASU 2023-09 on December 14, 2023 which amends income tax disclosures to provide information to better assess how an entity’s operations and related tax risks and tax planning and operational opportunities affect its tax rate and prospects for future cash flows. The new guidance requires the entity to disclose specific categories in the rate reconciliation and provide additional information for reconciling items that meet a quantitative threshold. ASU 2023-09 is effective for annual periods beginning after December 15, 2024. The Company is currently assessing the impact ASU 2023-09 will have on its income tax disclosures. FASB ASU 2024-01, Compensation—Stock Compensation (Topic 718): Scope Application of Profits Interest and Similar Awards The FASB issued ASU 2024-01 on March 21, 2024 which provides illustrative guidance to help entities determine whether profits interest and similar awards should be accounted for as share-based payment arrangements within the scope of Topic 718, Compensation—Stock Compensation . The ASU is effective for annual periods beginning after December 15, 2024, including interim periods within those periods. Adoption of ASU 2024-01 is not expected to have a material impact on the Company's financial statements.

Securities

Securities	6 Months Ended
	Jun. 30, 2024
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): June 30, 2024 December 31, 2023 Fair Value Net Unrealized Gain (Loss) Fair Value Net Unrealized Gain (Loss) U.S. government securities $ 71,169 $ 33 $ 10,959 $ 28 Residential agency mortgage-backed securities 5,023,892 5,742 5,105,137 98,124 Municipal securities 56,780 152 37,413 323 Other trading securities 60,950 83 39,996 160 Total trading securities $ 5,212,791 $ 6,010 $ 5,193,505 $ 98,635 Investment Securities The amortized cost and fair values of investment securities are as follows (in thousands): June 30, 2024 Amortized Carrying Fair Gross Unrealized Cost Value 1 Value Gain Loss Municipal securities $ 107,188 $ 107,188 $ 109,700 $ 2,976 $ (464) Mortgage-backed securities: Residential agency 2,129,826 1,990,626 1,786,096 91 (204,621) Commercial agency 17,258 16,066 15,030 — (1,036) Other debt securities 15,288 15,288 13,706 — (1,582) Total investment securities 2,269,560 2,129,168 1,924,532 3,067 (207,703) Allowance for credit losses (287) (287) — — — Investment securities, net of allowance $ 2,269,273 $ 2,128,881 $ 1,924,532 $ 3,067 $ (207,703) 1 Carrying value includes $140 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. December 31, 2023 Amortized Carrying Fair Gross Unrealized Cost Value 1 Value Gain Loss Municipal securities $ 120,705 $ 120,705 $ 125,525 $ 5,014 $ (194) Mortgage-backed securities: Residential agency 2,255,340 2,092,083 1,917,810 125 (174,398) Commercial agency 17,258 15,914 15,067 — (847) Other debt securities 15,787 15,787 14,184 — (1,603) Total investment securities 2,409,090 2,244,489 2,072,586 5,139 (177,042) Allowance for credit losses (336) (336) — — — Investment securities, net of allowance $ 2,408,754 $ 2,244,153 $ 2,072,586 $ 5,139 $ (177,042) 1 Carrying value includes $165 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 June 30, 2024, by contractual maturity, are as shown in the following table (dollars in thousands): Less than One to Six to Over Total Weighted Average Maturity 1 Fixed maturity debt securities: Carrying value $ 18,247 $ 101,521 $ 18,761 $ 13 $ 138,542 3.10 Fair value 18,397 102,988 17,038 13 138,436 Residential mortgage-backed securities: Carrying value $ 1,990,626 2 Fair value 1,786,096 Total investment securities: Carrying value $ 2,129,168 Fair value 1,924,532 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 4.9 years based upon current prepayment assumptions. Temporarily Impaired Investment Securities (dollars in thousands): June 30, 2024 Number of Securities Less Than 12 Months 12 Months or Longer Total Fair Unrealized Fair Unrealized Fair Unrealized Investment: Municipal securities 25 $ 16,795 $ 150 $ 7,679 $ 314 $ 24,474 $ 464 Mortgage-backed securities: Residential agency 116 — — 1,785,118 204,621 1,785,118 204,621 Commercial agency 2 — — 15,030 1,036 15,030 1,036 Other debt securities 3 — — 8,693 1,582 8,693 1,582 Total investment securities 146 $ 16,795 $ 150 $ 1,816,520 $ 207,553 $ 1,833,315 $ 207,703 December 31, 2023 Number of Securities Less Than 12 Months 12 Months or Longer Total Fair Unrealized Fair Unrealized Fair Unrealized Investment: Municipal securities 13 $ 1,931 $ 5 $ 6,600 $ 189 $ 8,531 $ 194 Mortgage-backed securities: Residential agency 116 — — 1,916,732 174,398 1,916,732 174,398 Commercial agency 2 — — 15,067 847 15,067 847 Other debt securities 3 — — 8,672 1,603 8,672 1,603 Total investment securities 134 $ 1,931 $ 5 $ 1,947,071 $ 177,037 $ 1,949,002 $ 177,042 Available for Sale Securities The amortized cost and fair value of available for sale securities are as follows (in thousands): June 30, 2024 Amortized Fair Gross Unrealized Cost Value Gain Loss U.S. Treasury $ 1,000 $ 923 $ — $ (77) Municipal securities 301,294 278,043 — (23,251) Mortgage-backed securities: Residential agency 8,401,476 8,108,567 12,321 (305,230) Residential non-agency 870,162 828,049 10,441 (52,554) Commercial agency 3,868,588 3,577,729 816 (291,675) Other debt securities 500 473 — (27) Total available for sale securities $ 13,443,020 $ 12,793,784 $ 23,578 $ (672,814) December 31, 2023 Amortized Fair Gross Unrealized Cost Value Gain Loss U.S. Treasury $ 1,000 $ 925 $ — $ (75) Municipal securities 544,707 502,833 1 (41,875) Mortgage-backed securities: Residential agency 7,066,645 6,834,720 36,983 (268,908) Residential non-agency 833,535 799,877 12,865 (46,523) Commercial agency 4,456,918 4,147,853 2,972 (312,037) Other debt securities 500 473 — (27) Total available for sale securities $ 12,903,305 $ 12,286,681 $ 52,821 $ (669,445) The amortized cost and fair values of available for sale securities at June 30, 2024, by contractual maturity, are as shown in the following table (dollars in thousands): Less than One to Six to Over Total Weighted Average Maturity 1 Fixed maturity debt securities: Amortized cost $ 415,221 $ 2,459,948 $ 852,408 $ 443,805 $ 4,171,382 5.08 Fair value 411,548 2,242,456 780,072 423,092 3,857,168 Residential mortgage-backed securities: Amortized cost $ 9,271,637 2 Fair value 8,936,615 Total available for sale securities: Amortized cost $ 13,443,020 Fair value 12,793,784 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 4.3 years based upon current prepayment assumptions. Sales of available for sale securities resulted in gains and losses as follows (in thousands): Three Months Ended Six Months Ended June 30, 2024 2023 2024 2023 Proceeds $ 1,836 $ 135,489 $ 737,830 $ 135,489 Gross realized gains 222 703 455 703 Gross realized losses (188) (3,713) (45,592) (3,713) Related federal and state income tax expense (benefit) 8 (708) (10,616) (708) 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 $12.6 billion at June 30, 2024 and $13.9 billion at December 31, 2023. The secured parties do not have the right to sell or repledge these securities. Temporarily Impaired Available for Sale Securities (Dollars in thousands) June 30, 2024 Number of Securities Less Than 12 Months 12 Months or Longer Total Fair Unrealized Fair Unrealized Fair Unrealized Available for sale: U.S. Treasury 1 $ — $ — $ 923 $ 77 $ 923 $ 77 Municipal securities 130 11,009 58 257,764 23,193 268,773 23,251 Mortgage-backed securities: Residential agency 793 3,033,904 24,223 3,650,900 281,007 6,684,804 305,230 Residential non-agency 41 166,281 1,108 515,977 51,446 682,258 52,554 Commercial agency 240 183,004 2,009 3,151,499 289,666 3,334,503 291,675 Other debt securities 1 — — 473 27 473 27 Total available for sale securities 1,206 $ 3,394,198 $ 27,398 $ 7,577,536 $ 645,416 $ 10,971,734 $ 672,814 December 31, 2023 Number of Securities Less Than 12 Months 12 Months or Longer Total Fair Unrealized Fair Unrealized Fair Unrealized Available for sale: U.S. Treasury 1 $ — $ — $ 925 $ 75 $ 925 $ 75 Municipal securities 190 6,799 410 494,955 41,465 501,754 41,875 Mortgage-backed securities: Residential agency 630 690,118 3,689 3,717,975 265,219 4,408,093 268,908 Residential non-agency 32 116,077 1,244 451,370 45,279 567,447 46,523 Commercial agency 269 392,828 2,626 3,421,757 309,411 3,814,585 312,037 Other debt securities 1 — — 473 27 473 27 Total available for sale securities 1,123 $ 1,205,822 $ 7,969 $ 8,087,455 $ 661,476 $ 9,293,277 $ 669,445 Based on evaluations of impaired securities as of June 30, 2024, 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): June 30, 2024 December 31, 2023 Fair Value Net Unrealized Gain (Loss) Fair Value Net Unrealized Gain (Loss) Residential agency mortgage-backed securities $ 19,050 $ (1,805) $ 20,671 $ (1,406)

Derivatives

Derivatives	6 Months Ended
	Jun. 30, 2024
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, interest rates, foreign exchange rates and other commodities 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 in the Consolidated Statements of Earnings. 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 June 30, 2024 (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 $ 2,964,667 $ 109,692 $ (2,691) $ 107,001 $ (103,743) $ 3,258 Energy contracts 7,472,357 631,285 (435,236) 196,049 (38,770) 157,279 Foreign exchange contracts 35,606 35,451 — 35,451 (22) 35,429 Equity option contracts 1,593 158 — 158 (50) 108 Total customer risk management programs 10,474,223 776,586 (437,927) 338,659 (142,585) 196,074 Trading 25,238,831 82,976 (59,454) 23,522 (1,520) 22,002 Internal risk management programs 456,976 7,284 (284) 7,000 — 7,000 Total derivative contracts $ 36,170,030 $ 866,846 $ (497,665) $ 369,181 $ (144,105) $ 225,076 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 $ 2,964,667 $ 109,685 $ (2,691) $ 106,994 $ — $ 106,994 Energy contracts 7,851,998 619,809 (435,236) 184,573 (54,007) 130,566 Foreign exchange contracts 35,590 35,419 — 35,419 (34) 35,385 Equity option contracts 1,593 158 — 158 — 158 Total customer risk management programs 10,853,848 765,071 (437,927) 327,144 (54,041) 273,103 Trading 24,337,408 83,121 (59,454) 23,667 (10,545) 13,122 Internal risk management programs 79,617 1,568 (284) 1,284 — 1,284 Total derivative contracts $ 35,270,873 $ 849,760 $ (497,665) $ 352,095 $ (64,586) $ 287,509 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, 2023 (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 $ 2,754,476 $ 108,450 $ (6,810) $ 101,640 $ (94,608) $ 7,032 Energy contracts 7,846,190 836,425 (399,148) 437,277 (169,141) 268,136 Foreign exchange contracts 54,999 53,863 — 53,863 (872) 52,991 Equity option contracts 3,316 54 — 54 (44) 10 Total customer risk management programs 10,658,981 998,792 (405,958) 592,834 (264,665) 328,169 Trading 16,264,818 118,545 (37,111) 81,434 (6,996) 74,438 Internal risk management programs 425,014 7,697 — 7,697 — 7,697 Total derivative contracts $ 27,348,813 $ 1,125,034 $ (443,069) $ 681,965 $ (271,661) $ 410,304 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 $ 2,754,476 $ 108,402 $ (6,810) $ 101,592 $ — $ 101,592 Energy contracts 8,254,004 831,467 (399,148) 432,319 (6,441) 425,878 Foreign exchange contracts 54,405 53,065 — 53,065 — 53,065 Equity option contracts 3,316 54 — 54 — 54 Total customer risk management programs 11,066,201 992,988 (405,958) 587,030 (6,441) 580,589 Trading 20,644,156 224,648 (37,111) 187,537 (181,917) 5,620 Internal risk management programs 2,244 1,264 — 1,264 — 1,264 Total derivative contracts $ 31,712,601 $ 1,218,900 $ (443,069) $ 775,831 $ (188,358) $ 587,473 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 June 30, 2024 June 30, 2023 Brokerage Gain (Loss) on Derivatives, Net Brokerage Gain (Loss) on Derivatives, Net Customer risk management programs: Interest rate contracts $ 547 $ — $ 2,339 $ — Energy contracts 6,162 — 11,250 — Foreign exchange contracts 56 — 53 — Equity option contracts — — — — Total customer risk management programs 6,765 — 13,642 — Trading 1 32,576 — 64,172 — Internal risk management programs — (1,091) — (8,159) Total derivative contracts $ 39,341 $ (1,091) $ 77,814 $ (8,159) 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. Six Months Ended June 30, 2024 June 30, 2023 Brokerage Gain (Loss) on Derivatives, Net Brokerage Gain (Loss) on Derivatives, Net Customer risk management programs: Interest rate contracts 3,007 — 4,109 — Energy contracts 9,977 — 17,803 — Foreign exchange contracts 106 — 84 — Equity option contracts — — — — Total customer risk management programs 13,090 — 21,996 — Trading 1 116,282 — 1,079 — Internal risk management programs — (9,724) — (9,503) Total derivative contracts $ 129,372 $ (9,724) $ 23,075 $ (9,503) 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.

Loans and Allowances for Credit

Loans and Allowances for Credit Losses	6 Months Ended
	Jun. 30, 2024
Loans and Leases Receivable, Net Amount [Abstract]
Loans [Text Block]	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. 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 are 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): June 30, 2024 December 31, 2023 Fixed Variable Non-accrual Total Fixed Variable Non-accrual Total Commercial $ 3,604,024 $ 11,960,951 $ 58,434 $ 15,623,409 $ 3,558,563 $ 11,135,075 $ 110,131 $ 14,803,769 Commercial real estate 756,055 4,314,637 12,883 5,083,575 791,757 4,538,570 7,320 5,337,647 Loans to individuals 2,428,707 1,398,524 19,366 3,846,597 2,282,914 1,452,620 28,018 3,763,552 Total $ 6,788,786 $ 17,674,112 $ 90,683 $ 24,553,581 $ 6,633,234 $ 17,126,265 $ 145,469 $ 23,904,968 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 June 30, 2024, outstanding commitments totaled $14.1 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 June 30, 2024, outstanding standby letters of credit totaled $737 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% 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% of the committed dollars in the portfolio is calculated using charge-off migration. The expected credit loss on approximately 1% 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 June 30, 2024 Commercial Commercial Real Estate Loans to Individuals Total Allowance for loan losses: Beginning balance $ 146,267 $ 97,479 $ 37,877 $ 281,623 Provision for loan losses 10,441 (1,042) 3,749 13,148 Loans charged off (6,391) (205) (1,344) (7,940) Recoveries of loans previously charged off 420 24 551 995 Ending balance $ 150,737 $ 96,256 $ 40,833 $ 287,826 Allowance for off-balance sheet credit risk from unfunded loan commitments: Beginning balance $ 17,790 $ 27,865 $ 1,664 $ 47,319 Provision for off-balance sheet credit risk (474) (4,551) 42 (4,983) Ending balance $ 17,316 $ 23,314 $ 1,706 $ 42,336 Six Months Ended June 30, 2024 Commercial Commercial Real Estate Loans to Individuals Total Allowance for loan losses: Beginning balance $ 141,232 $ 94,718 $ 41,173 $ 277,123 Provision for loan losses 18,752 2,953 1,403 23,108 Loans charged off (10,631) (1,455) (2,914) (15,000) Recoveries of loans previously charged off 1,384 40 1,171 2,595 Ending balance $ 150,737 $ 96,256 $ 40,833 $ 287,826 Allowance for off-balance sheet credit risk from unfunded loan commitments: Beginning balance $ 19,762 $ 27,439 $ 1,776 $ 48,977 Provision for off-balance sheet credit risk (2,446) (4,125) (70) (6,641) Ending balance $ 17,316 $ 23,314 $ 1,706 $ 42,336 Three Months Ended June 30, 2023 Commercial Commercial Real Estate Loans to Individuals Total Allowance for loan losses: Beginning balance $ 139,898 $ 66,003 $ 43,559 $ 249,460 Provision for loan losses 5,420 14,300 237 19,957 Loans charged off (2,797) (4,000) (1,252) (8,049) Recoveries of loans previously charged off 748 44 554 1,346 Ending balance $ 143,269 $ 76,347 $ 43,098 $ 262,714 Allowance for off-balance sheet credit risk from unfunded loan commitments: Beginning balance $ 20,608 $ 40,211 $ 2,124 $ 62,943 Provision for off-balance sheet credit risk (314) (2,530) (159) (3,003) Ending balance $ 20,294 $ 37,681 $ 1,965 $ 59,940 Six Months Ended June 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 11,750 24,726 (1,994) 34,482 Loans charged off (2,809) (6,208) (2,699) (11,716) Recoveries of loans previously charged off 2,742 181 1,321 4,244 Ending balance $ 143,269 $ 76,347 $ 43,098 $ 262,714 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 2,048 (2,809) (218) (979) Ending balance $ 20,294 $ 37,681 $ 1,965 $ 59,940 An $8.0 million provision for credit losses was necessary for the second quarter of 2024, reflecting continued loan growth and a stable economic outlook. The allowance for loan losses and recorded investment of the related loans by portfolio segment for each measurement method at June 30, 2024 is as follows (in thousands): Collectively Measured Individually Measured Total Recorded Investment Related Allowance Recorded Investment Related Allowance Recorded Investment Related Commercial $ 15,564,975 $ 148,523 $ 58,434 $ 2,214 $ 15,623,409 $ 150,737 Commercial real estate 5,070,692 96,256 12,883 — 5,083,575 96,256 Loans to individuals 3,827,231 40,833 19,366 — 3,846,597 40,833 Total $ 24,462,898 $ 285,612 $ 90,683 $ 2,214 $ 24,553,581 $ 287,826 The allowance for loan losses and recorded investment of the related loans by portfolio segment for each measurement method at December 31, 2023 is as follows (in thousands): Collectively Measured Individually Measured Total Recorded Investment Related Allowance Recorded Investment Related Allowance Recorded Investment Related Commercial $ 14,693,638 $ 138,540 $ 110,131 $ 2,692 $ 14,803,769 $ 141,232 Commercial real estate 5,330,327 94,718 7,320 — 5,337,647 94,718 Loans to individuals 3,735,534 41,173 28,018 — 3,763,552 41,173 Total $ 23,759,499 $ 274,431 $ 145,469 $ 2,692 $ 23,904,968 $ 277,123 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. The probability of default is lowest for pass graded loans and increases for 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 June 30, 2024 by the risk grade categories and vintage (in thousands): Origination Year 2024 2023 2022 2021 2020 Prior Revolving Loans Revolving Loans Converted to Term Loans Total Commercial: Healthcare Pass $ 275,268 $ 625,281 $ 921,843 $ 565,653 $ 379,669 $ 992,889 $ 262,814 $ 12 $ 4,023,429 Special Mention — 15,000 31,907 1,178 — 49,823 505 — 98,413 Accruing Substandard — — 110 18,287 58,103 10,896 975 — 88,371 Nonaccrual — 1,375 237 — — 19,233 — — 20,845 Total healthcare 275,268 641,656 954,097 585,118 437,772 1,072,841 264,294 12 4,231,058 Loans charged off, year-to-date — — — — — 6,840 — — 6,840 Services Pass 330,400 735,946 506,992 350,009 211,087 691,191 704,785 459 3,530,869 Special Mention — 1,814 1,035 898 — 8,330 1,758 — 13,835 Accruing Substandard — — 17,437 147 1,607 8,929 436 719 29,275 Nonaccrual — — — 1,361 363 — 1,441 — 3,165 Total services 330,400 737,760 525,464 352,415 213,057 708,450 708,420 1,178 3,577,144 Loans charged off, year-to-date — — — — 10 — 9 — 19 Energy Pass 55,874 103,305 78,634 2,707 7,288 20,140 3,123,257 — 3,391,205 Special Mention — — — — — — 17,662 — 17,662 Accruing Substandard — — — — — — 13,950 — 13,950 Nonaccrual — — — — — 80 28,588 — 28,668 Total energy 55,874 103,305 78,634 2,707 7,288 20,220 3,183,457 — 3,451,485 Loans charged off, year-to-date — — — — — — — — — General business Pass 543,566 741,365 376,769 191,698 128,816 346,596 1,918,875 1,733 4,249,418 Special Mention 2,488 15,760 5,201 11,765 535 1,764 9,307 — 46,820 Accruing Substandard — 4,090 38,900 1,542 1,193 6,539 9,301 163 61,728 Nonaccrual — 994 66 — — 35 4,658 3 5,756 Total general business 546,054 762,209 420,936 205,005 130,544 354,934 1,942,141 1,899 4,363,722 Loans charged off, year-to-date — 27 1,399 — — 158 2,182 6 3,772 Total commercial 1,207,596 2,244,930 1,979,131 1,145,245 788,661 2,156,445 6,098,312 3,089 15,623,409 Commercial real estate: Pass 39,377 449,401 2,084,982 919,126 343,462 1,025,082 136,787 — 4,998,217 Special Mention — 403 14,907 32,131 — 16,949 — — 64,390 Accruing Substandard — — — — — 8,085 — — 8,085 Nonaccrual — 2,885 — — — 9,998 — — 12,883 Total commercial real estate 39,377 452,689 2,099,889 951,257 343,462 1,060,114 136,787 — 5,083,575 Loans charged off, year-to-date — — — — — 1,455 — — 1,455 Origination Year 2024 2023 2022 2021 2020 Prior Revolving Loans Revolving Loans Converted to Term Loans Total Loans to individuals: Residential mortgage Pass 249,631 377,061 308,510 330,796 332,439 267,548 378,185 21,123 2,265,293 Special Mention — 42 193 176 — 155 1,575 — 2,141 Accruing Substandard — 49 — 3 — — 1,113 — 1,165 Nonaccrual — 107 433 434 510 8,218 2,377 548 12,627 Total residential mortgage 249,631 377,259 309,136 331,409 332,949 275,921 383,250 21,671 2,281,226 Loans charged off, year-to-date — — — — — 5 9 — 14 Residential mortgage guaranteed by U.S. government agencies Pass — 893 3,466 2,727 3,982 114,140 — — 125,208 Nonaccrual — — — — 280 6,337 — — 6,617 Total residential mortgage guaranteed by U.S. government agencies — 893 3,466 2,727 4,262 120,477 — — 131,825 Personal Pass 148,880 180,029 187,435 133,383 110,809 171,280 499,184 92 1,431,092 Special Mention — 28 35 65 15 2 1 — 146 Accruing Substandard — 30 12 3 7 144 1,990 — 2,186 Nonaccrual — 26 44 11 9 8 24 — 122 Total personal 148,880 180,113 187,526 133,462 110,840 171,434 501,199 92 1,433,546 Loans charged off, year-to-date 1 2,732 51 45 26 — — 26 20 2,900 Total loans to individuals 398,511 558,265 500,128 467,598 448,051 567,832 884,449 21,763 3,846,597 Total loans $ 1,645,484 $ 3,255,884 $ 4,579,148 $ 2,564,100 $ 1,580,174 $ 3,784,391 $ 7,119,548 $ 24,852 $ 24,553,581 1 Includes charge-offs on deposit overdrafts, which are generally charged off at 60 days past due. The following table summarizes the Company's loan portfolio at December 31, 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: Healthcare Pass 650,768 895,602 590,736 409,001 331,897 809,858 281,378 15 3,969,255 Special Mention — — — 21,791 — 31,235 5 — 53,031 Accruing Substandard — 2,128 18,508 6,911 — 10,896 975 — 39,418 Nonaccrual — — — 30,290 23,129 28,110 — — 81,529 Total healthcare 650,768 897,730 609,244 467,993 355,026 880,099 282,358 15 4,143,233 Loans charged off, year-to-date — — — — 2,500 — — — 2,500 Services Pass 900,090 526,776 401,872 228,818 106,112 643,477 730,729 595 3,538,469 Special Mention — 1,085 1,520 1,341 534 4,522 81 — 9,083 Accruing Substandard — 13,712 178 326 3,972 3,746 3,108 13 25,055 Nonaccrual — — 1,635 338 — — 1,643 — 3,616 Total services 900,090 541,573 405,205 230,823 110,618 651,745 735,561 608 3,576,223 Loans charged off, year-to-date — — 3,060 — — — 2,642 — 5,702 Energy Pass $ 190,122 $ 100,006 $ 43,769 $ 7,876 $ 9,562 $ 11,583 $ 3,025,590 $ — $ 3,388,508 Special Mention — — — — — — 13,950 — 13,950 Accruing Substandard — — — — — — 16,800 — 16,800 Nonaccrual — — — — — 99 17,744 — 17,843 Total energy 190,122 100,006 43,769 7,876 9,562 11,682 3,074,084 — 3,437,101 General business Pass 942,468 436,832 224,735 138,951 101,100 287,744 1,389,128 2,164 3,523,122 Special Mention 10,264 16,167 8,420 1,253 321 8,295 897 — 45,617 Accruing Substandard 4,401 33,194 1,716 27 — — 31,992 — 71,330 Nonaccrual — 1,134 — — — 48 5,956 5 7,143 Total general business 957,133 487,327 234,871 140,231 101,421 296,087 1,427,973 2,169 3,647,212 Loans charged off, year-to-date — — 4,598 2 — 48 10 38 4,696 Total commercial 2,698,113 2,026,636 1,293,089 846,923 576,627 1,839,613 5,519,976 2,792 14,803,769 Commercial real estate: Pass 396,891 1,941,913 1,194,759 416,647 513,555 705,092 136,095 — 5,304,952 Special Mention — 476 — — — 19,171 — — 19,647 Accruing Substandard 2,992 — 3 — — 2,733 — — 5,728 Nonaccrual — — — — 7,170 150 — — 7,320 Total commercial real estate 399,883 1,942,389 1,194,762 416,647 520,725 727,146 136,095 — 5,337,647 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 426,089 320,733 342,927 349,742 54,801 243,356 375,739 23,895 2,137,282 Special Mention 157 140 131 1,361 18 134 2,982 93 5,016 Accruing Substandard — 150 — — 37 49 50 — 286 Nonaccrual 79 1,419 237 544 344 12,381 2,387 665 18,056 Total residential mortgage 426,325 322,442 343,295 351,647 55,200 255,920 381,158 24,653 2,160,640 Loans charged off, year-to-date — — 51 4 — 17 — 1 73 Residential mortgage guaranteed by U.S. government agencies Pass 633 1,788 2,220 4,297 6,441 124,719 — — 140,098 Nonaccrual — — — 280 375 9,054 — — 9,709 Total residential mortgage guaranteed by U.S. government agencies 633 1,788 2,220 4,577 6,816 133,773 — — 149,807 Personal Pass 218,401 229,580 149,291 136,215 75,348 137,629 503,841 145 1,450,450 Special Mention 66 39 106 30 8 — 1,918 3 2,170 Accruing Substandard — 64 12 9 144 — 3 — 232 Nonaccrual 4 51 9 16 3 12 158 — 253 Total personal 218,471 229,734 149,418 136,270 75,503 137,641 505,920 148 1,453,105 Loans charged off, year-to-date 1 5,636 82 96 43 — 10 6 26 5,899 Total loans to individuals 645,429 553,964 494,933 492,494 137,519 527,334 887,078 24,801 3,763,552 Total loans $ 3,743,425 $ 4,522,989 $ 2,982,784 $ 1,756,064 $ 1,234,871 $ 3,094,093 $ 6,543,149 $ 27,593 $ 23,904,968 1 Includes charge-offs on deposit overdrafts, which are generally charged off at 60 days past due. Nonaccruing Loans A summary of nonaccruing loans at June 30, 2024 follows (in thousands): As of June 30, 2024 Total With No With Allowance Related Allowance Commercial: Healthcare $ 20,845 $ 10,930 $ 9,915 $ 1,700 Services 3,165 1,521 1,644 441 Energy 28,668 28,668 — — General business 5,756 5,618 138 73 Total commercial 58,434 46,737 11,697 2,214 Commercial real estate 12,883 12,883 — — Loans to individuals: Residential mortgage 12,627 12,627 — — Residential mortgage guaranteed by U.S. government agencies 6,617 6,617 — — Personal 122 122 — — Total loans to individuals 19,366 19,366 — — Total $ 90,683 $ 78,986 $ 11,697 $ 2,214 A summary of nonaccruing loans at December 31, 2023 follows (in thousands): As of December 31, 2023 Total With No With Allowance Related Allowance Commercial: Healthcare $ 81,529 $ 40,372 $ 41,157 $ 1,478 Services 3,616 1,684 1,932 1,214 Energy 17,843 17,843 — — General business 7,143 7,143 — — Total commercial 110,131 67,042 43,089 2,692 Commercial real estate 7,320 7,320 — — Loans to individuals: Residential mortgage 18,056 18,056 — — Residential mortgage guaranteed by U.S. government agencies 9,709 9,709 — — Personal 253 253 — — Total loans to individuals 28,018 28,018 — — Total $ 145,469 $ 102,380 $ 43,089 $ 2,692 Loan Modifica

Mortgage Banking Activities

Mortgage Banking Activities	6 Months Ended
	Jun. 30, 2024
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): June 30, 2024 December 31, 2023 Unpaid Principal Balance/ Fair Value Unpaid Principal Balance/ Fair Value Residential mortgage loans held for sale $ 105,922 $ 105,706 $ 56,922 $ 56,457 Residential mortgage loan commitments 62,960 1,945 34,783 1,379 Forward sales contracts 127,010 (186) 75,448 (901) $ 107,465 $ 56,935 No residential mortgage loans held for sale were 90 days or more past due or considered impaired as of June 30, 2024 or December 31, 2023. No credit losses were recognized on residential mortgage loans held for sale for the six month period ended June 30, 2024 and 2023. Mortgage banking revenue was as follows (in thousands): Three Months Ended Six Months Ended 2024 2023 2024 2023 Production revenue: Net realized gains (losses) on sale of mortgage loans $ 2,338 $ (296) $ 4,364 $ (2,027) Net change in unrealized gain (loss) on mortgage loans held for sale 631 (496) 249 (126) Net change in the fair value of mortgage loan commitments (528) (865) 566 775 Net change in the fair value of forward sales contracts (72) 1,373 715 461 Total production revenue (loss) 2,369 (284) 5,894 (917) Servicing revenue 16,259 15,425 31,701 30,425 Total mortgage banking revenue $ 18,628 $ 15,141 $ 37,595 $ 29,508 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): June 30, 2024 December 31, 2023 Number of residential mortgage loans serviced for others 125,698 115,967 Outstanding principal balance of residential mortgage loans serviced for others $ 22,188,347 $ 20,382,192 Weighted average interest rate 3.68 % 3.64 % Remaining term (in months) 278 280 The following represents activity in capitalized mortgage servicing rights (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 Beginning Balance $ 319,330 $ 299,803 $ 293,884 $ 277,608 Additions 4,454 4,103 6,970 6,603 Acquisitions 14,021 — 31,421 31,138 Change in fair value due to principal payments (8,012) (8,445) (13,459) (13,829) Change in fair value due to market assumption changes 3,453 9,261 14,430 3,202 Ending Balance $ 333,246 $ 304,722 $ 333,246 $ 304,722 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: June 30, 2024 December 31, 2023 Discount rate – risk-free rate plus a market premium 9.91% 9.72% Prepayment rate – based upon loan interest rate, original term and loan type 6.75% 7.34% Loan servicing costs – annually per loan based upon loan type: Performing loans $73 - $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 4.38% 3.90% Primary/secondary mortgage rate spread 115 bps 105 bps Delinquency rate 2.48% 2.06% 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.

Commitments and Contingent Liab

Commitments and Contingent Liabilities	6 Months Ended
	Jun. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies Disclosure [Text Block]	Commitments and Contingent Liabilities Litigation Contingencies As a member of Visa, BOK Financial is obligated for a proportionate share of certain covered litigation losses incurred by Visa under a retrospective responsibility plan. A contingent liability was recognized for the Company’s share of Visa’s covered litigation liabilities. Visa funded an escrow account to cover litigation claims, including covered litigation losses under the retrospective responsibility plan, with proceeds from its initial public offering in 2008 and from available cash. On January 23, 2024, Visa, Inc. stockholders approved an exchange offer which provided holders of Class B-1 shares an option to convert up to 50% of its Class B-1 shares to Visa Class C shares and subsequently to freely transferable Visa Class A common shares subject to certain restrictions and holding period requirements (the "Exchange Offer"). The Exchange Offer opened on April 8, 2024 and expired on May 3, 2024. The Company tendered all of its 252,233 Class B-1 Visa shares under the Exchange Offer and received the equivalent of 200,212 shares of Visa common shares and 126,116 Visa B-2 shares in return. Conversion of the Class B-1 shares did not reduce our proportionate share of the covered litigation losses which may dilute our remaining Class B-2 shares if the escrow fund is not adequate to cover final litigation costs. BOKF, NA is subject to litigation related to its role as Indenture Trustee for multiple municipal bonds to which Christopher Brogdon acted as borrower. The principal amount of the bonds remaining unpaid at this time is $33 million. Mr. Brogdon is obligated to pay the bonds in full by virtue of a Judgment in the USDC of New Jersey which allows the SEC to pursue collection to satisfy the Judgment, which the SEC continues to pursue. The remaining cases are (i) Robert Elliot & Marvin Loeb on behalf of a class of persons purchasing bonds in multiple municipal bond issuances v. BOKF, NA, USDC District of New Jersey, Case No. 2:16-cv-05218-KM-JBC (commenced 11/20/2015); and (ii) Burn Rose, LLC et al v. BOKF, NA d/b/a BOK, Tulsa County District Court Case, No. CJ-2016-03325 (commenced 9/22/2016). In the New Jersey Class Action and the Tulsa County Burn Rose action, the claimants allege that BOKF, NA was complicit in the fraud committed by Mr. Brogdon. BOKF, NA has multiple defenses to the claims, including the defense that it is exculpated by the terms of the various bond indentures. No action has been taken in the class action by the plaintiffs to establish the class and the amount of the damages, if any, cannot be reasonably estimated. Approximately $3 million is claimed as damages in the Burn Rose action. Management is advised that a loss on the claims in both the Class Action and the Burn Rose action is not 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 June 30, 2024, the Company has $412 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 $107 million of unfunded commitments included in Other liabilities on the Consolidated Balance Sheets.

Shareholders' Equity

Shareholders' Equity	6 Months Ended
	Jun. 30, 2024
Stockholders' Equity Note [Abstract]
Shareholders' Equity [Text Block]	Shareholders' Equity On July 30, 2024, the Company declared a quarterly cash dividend of $0.55 per common share payable on or about August 30, 2024 to shareholders of record as of August 15, 2024. Dividends declared were $0.55 and $1.10 per share during the three and six months ended June 30, 2024 and $0.54 and $1.08 per share during the three and six months ended June 30, 2023. Accumulated Other Comprehensive Income (Loss) AOCI includes unrealized gains and losses on 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 Total Balance, Dec. 31, 2022 $ (664,618) $ (172,337) (836,955) Net change in unrealized gain (loss) (36,363) — (36,363) Reclassification adjustments included in earnings: Interest revenue, Investment securities — 32,084 32,084 Loss on available for sale securities, net 3,010 — 3,010 Other comprehensive income (loss), before income taxes (33,353) 32,084 (1,269) Federal and state income taxes (8,839) 7,287 (1,552) Other comprehensive income (loss), net of income taxes (24,514) 24,797 283 Balance, June 30, 2023 $ (689,132) $ (147,540) $ (836,672) Balance, Dec. 31, 2023 $ (473,212) $ (125,888) $ (599,100) Net change in unrealized gain (loss) (77,749) — (77,749) Reclassification adjustments included in earnings: Interest revenue, Investment securities — 24,210 24,210 Loss on available for sale securities, net 45,137 — 45,137 Other comprehensive income (loss), before income taxes (32,612) 24,210 (8,402) Federal and state income taxes (7,695) 5,695 (2,000) Other comprehensive income (loss), net of income taxes (24,917) 18,515 (6,402) Balance, June 30, 2024 $ (498,129) $ (107,373) $ (605,502)

Earnings Per Share

Earnings Per Share	6 Months Ended
	Jun. 30, 2024
Earnings Per Share [Abstract]
Earnings Per Share [Text Block]	Earnings Per Share (In thousands, except share and per share amounts) Three Months Ended June 30, Six Months Ended 2024 2023 2024 2023 Numerator: Net income attributable to BOK Financial Corp. shareholders $ 163,713 $ 151,308 $ 247,416 $ 313,676 Less: Earnings allocated to participating securities 1,602 1,202 2,278 2,457 Numerator for basic earnings per share – income available to common shareholders 162,111 150,106 245,138 311,219 Effect of reallocating undistributed earnings of participating securities — — — — Numerator for diluted earnings per share – income available to common shareholders $ 162,111 $ 150,106 $ 245,138 $ 311,219 Denominator: Weighted average shares outstanding 64,343,898 66,521,728 64,578,226 66,684,603 Less: Participating securities included in weighted average shares outstanding 629,694 527,596 576,072 522,555 Denominator for basic earnings per common share 63,714,204 65,994,132 64,002,154 66,162,048 Dilutive effect of employee stock compensation plans — — — — Denominator for diluted earnings per common share 63,714,204 65,994,132 64,002,154 66,162,048 Basic earnings per share $ 2.54 $ 2.27 $ 3.83 $ 4.70 Diluted earnings per share $ 2.54 $ 2.27 $ 3.83 $ 4.70

Reportable Segments

Reportable Segments	6 Months Ended
	Jun. 30, 2024
Segment Reporting [Abstract]
Reportable Segments [Text Block]	Reportable Segments Reportable segments reconciliation to the Consolidated Financial Statements for the three months ended June 30, 2024 is as follows (in thousands): Commercial Consumer Wealth Funds Management and Other BOK Net interest income from external sources $ 283,328 $ 6,192 $ 2,612 $ 3,889 $ 296,021 Net interest income (expense) from internal sources (79,593) 58,972 26,889 (6,268) — Net interest income 203,735 65,164 29,501 (2,379) 296,021 Net loans charged off and provision for credit losses 6,134 1,247 — 619 8,000 Net interest income after provision for credit losses 197,601 63,917 29,501 (2,998) 288,021 Other operating revenue 54,536 36,252 113,208 55,708 259,704 Other operating expense 76,114 55,128 90,214 115,234 336,690 Net direct contribution 176,023 45,041 52,495 (62,524) 211,035 Gain (loss) on financial instruments, net 168 (3,577) — 3,409 — Change in fair value of mortgage servicing rights — 3,453 — (3,453) — Gain on repossessed assets, net — 9 — (9) — Corporate expense allocations 17,381 13,392 16,484 (47,257) — Net income before taxes 158,810 31,534 36,011 (15,320) 211,035 Federal and state income taxes 39,247 7,417 8,514 (7,875) 47,303 Net income 119,563 24,117 27,497 (7,445) 163,732 Net income attributable to non-controlling interests — — — 19 19 Net income attributable to BOK Financial Corp. shareholders $ 119,563 $ 24,117 $ 27,497 $ (7,464) $ 163,713 Average assets $ 30,305,613 $ 9,630,470 $ 16,452,098 $ (5,192,982) $ 51,195,199 Reportable segments reconciliation to the Consolidated Financial Statements for the six months ended June 30, 2024 is as follows (in thousands): Commercial Consumer Wealth Funds Management and Other BOK Net interest income from external sources $ 566,084 $ 13,542 $ 9,611 $ 356 $ 589,593 Net interest income (expense) from internal sources (158,354) 115,757 48,288 (5,691) — Net interest income 407,730 129,299 57,899 (5,335) 589,593 Net loans charged off and provision for credit losses 10,294 3,055 (15) 2,666 16,000 Net interest income after provision for credit losses 397,436 126,244 57,914 (8,001) 573,593 Other operating revenue 104,542 72,459 231,912 12,492 421,405 Other operating expense 146,209 108,575 189,502 232,788 677,074 Net direct contribution 355,769 90,128 100,324 (228,297) 317,924 Gain (loss) on financial instruments, net 335 (13,240) — 12,905 — Change in fair value of mortgage servicing rights — 14,430 — (14,430) — Gain on repossessed assets, net — 116 — (116) — Corporate expense allocations 35,778 27,564 31,263 (94,605) — Net income (loss) before taxes 320,326 63,870 69,061 (135,333) 317,924 Federal and state income taxes 78,966 15,022 16,336 (39,826) 70,498 Net income (loss) 241,360 48,848 52,725 (95,507) 247,426 Net income attributable to non-controlling interests — — — 10 10 Net income attributable to BOK Financial Corp. shareholders $ 241,360 $ 48,848 $ 52,725 $ (95,517) $ 247,416 Average assets $ 30,056,215 $ 9,511,225 $ 16,105,713 $ (5,061,768) $ 50,611,385 Reportable segments reconciliation to the Consolidated Financial Statements for the three months ended June 30, 2023 is as follows (in thousands): Commercial Consumer Wealth Funds Management and Other BOK Net interest income from external sources $ 299,712 $ 17,828 $ 4,415 $ 306 $ 322,261 Net interest income (expense) from internal sources (77,975) 50,260 29,426 (1,711) — Net interest income 221,737 68,088 33,841 (1,405) 322,261 Net loans charged off and provision for credit losses 6,000 1,129 (45) 9,916 17,000 Net interest income after provision for credit losses 215,737 66,959 33,886 (11,321) 305,261 Other operating revenue 68,828 32,277 123,043 (15,099) 209,049 Other operating expense 77,559 52,340 84,587 104,187 318,673 Net direct contribution 207,006 46,896 72,342 (130,607) 195,637 Gain (loss) on financial instruments, net 231 (10,257) — 10,026 — Change in fair value of mortgage servicing rights — 9,261 — (9,261) — Gain on repossessed assets, net 408 — — (408) — Corporate expense allocations 21,404 12,318 12,784 (46,506) — Net income before taxes 186,241 33,582 59,558 (83,744) 195,637 Federal and state income taxes 45,462 7,898 14,056 (23,415) 44,001 Net income 140,779 25,684 45,502 (60,329) 151,636 Net income attributable to non-controlling interests — — — 328 328 Net income attributable to BOK Financial Corp. shareholders $ 140,779 $ 25,684 $ 45,502 $ (60,657) $ 151,308 Average assets $ 28,170,869 $ 9,597,723 $ 12,949,258 $ (2,809,743) $ 47,908,107 Reportable segments reconciliation to the Consolidated Financial Statements for the six months ended June 30, 2023 is as follows (in thousands): Commercial Consumer Wealth Funds Management and Other BOK Net interest income from external sources $ 587,970 $ 38,974 $ 25,355 $ 22,310 $ 674,609 Net interest income (expense) from internal sources (139,134) 96,324 44,087 (1,277) — Net interest income 448,836 135,298 69,442 21,033 674,609 Net loans charged off and provision for credit losses 6,076 2,313 (69) 24,680 33,000 Net interest income after provision for credit losses 442,760 132,985 69,511 (3,647) 641,609 Other operating revenue 125,673 62,887 231,954 (33,600) 386,914 Other operating expense 150,693 102,538 166,342 204,912 624,485 Net direct contribution 417,740 93,334 135,123 (242,159) 404,038 Gain (loss) on financial instruments, net 173 (14,930) — 14,757 — Change in fair value of mortgage servicing rights — 3,202 — (3,202) — Gain on repossessed assets, net 1,267 14 — (1,281) — Corporate expense allocations 39,122 23,940 25,310 (88,372) — Net income before taxes 380,058 57,680 109,813 (143,513) 404,038 Federal and state income taxes 92,610 13,566 25,927 (42,197) 89,906 Net income 287,448 44,114 83,886 (101,316) 314,132 Net income attributable to non-controlling interests — — — 456 456 Net income attributable to BOK Financial Corp. shareholders $ 287,448 $ 44,114 $ 83,886 $ (101,772) $ 313,676 Average assets $ 28,166,923 $ 9,765,186 $ 12,309,730 $ (3,291,232) $ 46,950,607

Fees and Commissions Revenue Fe

Fees and Commissions Revenue Fees and Commissions Revenue	6 Months Ended
	Jun. 30, 2024
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 BOKF, NA. 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 June 30, 2024 (in thousands): Commercial Consumer Wealth Management Funds Management & Other Consolidated Out of Scope 1 In Scope 2 Trading revenue $ — $ — $ 27,695 $ — $ 27,695 $ 27,695 $ — Customer hedging revenue 3,408 — 3,047 310 6,765 6,765 — Retail brokerage revenue — — 4,838 — 4,838 — 4,838 Investment banking revenue 4,106 — 9,613 — 13,719 3,942 9,777 Brokerage and trading revenue 7,514 — 45,193 310 53,017 38,402 14,615 TransFund EFT network revenue 21,883 776 (19) — 22,640 — 22,640 Merchant services revenue 2,502 8 — — 2,510 — 2,510 Corporate card revenue 1,868 — 161 67 2,096 — 2,096 Transaction card revenue 26,253 784 142 67 27,246 — 27,246 Personal trust revenue — — 26,770 — 26,770 — 26,770 Corporate trust revenue — — 8,646 — 8,646 — 8,646 Institutional trust & retirement plan services revenue — — 16,519 — 16,519 — 16,519 Investment management services and other revenue — — 5,641 — 5,641 — 5,641 Fiduciary and asset management revenue — — 57,576 — 57,576 — 57,576 Commercial account service charge revenue 15,395 552 603 — 16,550 — 16,550 Overdraft fee revenue 27 5,374 32 — 5,433 — 5,433 Check card revenue — 6,049 — — 6,049 — 6,049 Automated service charge and other deposit fee revenue 259 1,189 92 — 1,540 — 1,540 Deposit service charges and fees 15,681 13,164 727 — 29,572 — 29,572 Mortgage production revenue — 2,369 — — 2,369 2,369 — Mortgage servicing revenue — 16,964 — (705) 16,259 16,259 — Mortgage banking revenue — 19,333 — (705) 18,628 18,628 — Other revenue 4,272 2,971 9,570 (2,825) 13,988 8,400 5,588 Total fees and commissions revenue $ 53,720 $ 36,252 $ 113,208 $ (3,153) $ 200,027 $ 65,430 $ 134,597 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 six months ended June 30, 2024 (in thousands): Commercial Consumer Wealth Management Funds Management & Other Consolidated Out of Scope 1 In Scope 2 Trading revenue $ — $ — $ 65,152 $ — $ 65,152 $ 65,152 $ — Customer hedging revenue 7,151 — 5,067 872 13,090 13,090 — Retail brokerage revenue — — 9,531 — 9,531 — 9,531 Investment banking revenue 7,925 — 16,498 — 24,423 7,036 17,387 Brokerage and trading revenue 15,076 — 96,248 872 112,196 85,278 26,918 TransFund EFT network revenue 42,349 1,602 (37) — 43,914 — 43,914 Merchant services revenue 4,682 17 — — 4,699 — 4,699 Corporate card revenue 3,606 — 340 180 4,126 — 4,126 Transaction card revenue 50,637 1,619 303 180 52,739 — 52,739 Personal trust revenue — — 51,115 — 51,115 — 51,115 Corporate trust revenue — — 17,906 — 17,906 — 17,906 Institutional trust & retirement plan services revenue — — 32,667 — 32,667 — 32,667 Investment management services and other revenue — — 11,193 — 11,193 — 11,193 Fiduciary and asset management revenue — — 112,881 — 112,881 — 112,881 Commercial account service charge revenue 30,295 1,083 1,149 — 32,527 — 32,527 Overdraft fee revenue 63 10,768 62 — 10,893 — 10,893 Check card revenue — 11,719 — — 11,719 — 11,719 Automated service charge and other deposit fee revenue 528 2,425 165 — 3,118 — 3,118 Deposit service charges and fees 30,886 25,995 1,376 — 58,257 — 58,257 Mortgage production revenue — 5,894 — — 5,894 5,894 — Mortgage servicing revenue — 33,079 — (1,378) 31,701 31,701 — Mortgage banking revenue — 38,973 — (1,378) 37,595 37,595 — Other revenue 7,751 5,872 21,104 (7,804) 26,923 16,312 10,611 Total fees and commissions revenue $ 104,350 $ 72,459 $ 231,912 $ (8,130) $ 400,591 $ 139,185 $ 261,406 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 June 30, 2023 (in thousands): Commercial Consumer Wealth Management Funds Management & Other Consolidated Out of Scope 1 In Scope 2 Trading revenue $ — $ — $ 36,921 $ — $ 36,921 $ 36,921 $ — Customer hedging revenue 12,839 — (159) 962 13,642 13,642 — Retail brokerage revenue — — 3,321 — 3,321 — 3,321 Insurance brokerage revenue — — 2,857 — 2,857 — 2,857 Investment banking revenue 3,514 — 4,751 — 8,265 3,452 4,813 Brokerage and trading revenue 16,353 — 47,691 962 65,006 54,015 10,991 TransFund EFT network revenue 20,483 907 (17) 2 21,375 — 21,375 Merchant services revenue 2,494 10 — — 2,504 — 2,504 Corporate card revenue 1,834 — 184 106 2,124 — 2,124 Transaction card revenue 24,811 917 167 108 26,003 — 26,003 Personal trust revenue — — 25,315 — 25,315 — 25,315 Corporate trust revenue — — 7,201 — 7,201 — 7,201 Institutional trust & retirement plan services revenue — — 13,707 — 13,707 — 13,707 Investment management services and other revenue — — 6,775 (1) 6,774 — 6,774 Fiduciary and asset management revenue — — 52,998 (1) 52,997 — 52,997 Commercial account service charge revenue 13,364 530 488 (2) 14,380 — 14,380 Overdraft fee revenue 32 5,066 42 1 5,141 — 5,141 Check card revenue — 5,976 — (1) 5,975 — 5,975 Automated service charge and other deposit fee revenue 267 1,233 103 1 1,604 — 1,604 Deposit service charges and fees 13,663 12,805 633 (1) 27,100 — 27,100 Mortgage production revenue — (284) — — (284) (284) — Mortgage servicing revenue — 15,993 — (568) 15,425 15,425 — Mortgage banking revenue — 15,709 — (568) 15,141 15,141 — Other revenue 4,877 2,930 21,561 (15,118) 14,250 8,166 6,084 Total fees and commissions revenue $ 59,704 $ 32,361 $ 123,050 $ (14,618) $ 200,497 $ 77,322 $ 123,175 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 six months ended June 30, 2023 (in thousands): Commercial Consumer Wealth Management Funds Management & Other Consolidated Out of Scope 1 In Scope 2 Trading revenue $ — $ — $ 64,519 $ — $ 64,519 $ 64,519 $ — Customer hedging revenue 19,326 — (59) 2,729 21,996 21,996 — Retail brokerage revenue — — 7,165 — 7,165 — 7,165 Insurance brokerage revenue — — 6,163 — 6,163 — 6,163 Investment banking revenue 7,212 — 10,347 — 17,559 7,050 10,509 Brokerage and trading revenue 26,538 — 88,135 2,729 117,402 93,565 23,837 TransFund EFT network revenue 40,982 1,815 (34) 4 42,767 — 42,767 Merchant services revenue 4,644 18 — — 4,662 — 4,662 Corporate card revenue 3,619 — 361 215 4,195 — 4,195 Transaction card revenue 49,245 1,833 327 219 51,624 — 51,624 Personal trust revenue — — 48,842 — 48,842 — 48,842 Corporate trust revenue — — 14,861 — 14,861 — 14,861 Institutional trust & retirement plan services revenue — — 26,960 — 26,960 — 26,960 Investment management services and other revenue — — 13,013 (22) 12,991 — 12,991 Fiduciary and asset management revenue — — 103,676 (22) 103,654 — 103,654 Commercial account service charge revenue 26,235 1,029 965 (2) 28,227 — 28,227 Overdraft fee revenue 57 9,894 62 1 10,014 — 10,014 Check card revenue — 11,614 — — 11,614 — 11,614 Automated service charge and other deposit fee revenue 504 2,546 162 1 3,213 — 3,213 Deposit service charges and fees 26,796 25,083 1,189 — 53,068 — 53,068 Mortgage production revenue — (917) — — (917) (917) — Mortgage servicing revenue — 31,551 — (1,126) 30,425 30,425 — Mortgage banking revenue — 30,634 — (1,126) 29,508 29,508 — Other revenue 12,960 5,392 38,634 (25,766) 31,220 16,727 14,493 Total fees and commissions revenue $ 115,539 $ 62,942 $ 231,961 $ (23,966) $ 386,476 $ 139,800 $ 246,676

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2024
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 six months ended June 30, 2024 and 2023, respectively. Transfers between significant other observable inputs and significant unobservable inputs during the three and six months ended June 30, 2024 and 2023 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 June 30, 2024 or December 31, 2023. 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 June 30, 2024 (in thousands): Total Quoted Prices in Active Markets for Identical Instruments (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs Assets: Trading securities: U.S. government securities $ 71,169 $ 69,955 $ 1,214 $ — Residential agency mortgage-backed securities 5,023,892 — 5,023,892 — Municipal securities 56,780 — 56,780 — Other trading securities 60,950 — 60,950 — Total trading securities 5,212,791 69,955 5,142,836 — Available for sale securities: U.S. Treasury 923 923 — — Municipal securities 278,043 — 278,043 — Residential agency mortgage-backed securities 8,108,567 — 8,108,567 — Residential non-agency mortgage-backed securities 828,049 — 828,049 — Commercial agency mortgage-backed securities 3,577,729 — 3,577,729 — Other debt securities 473 — — 473 Total available for sale securities 12,793,784 923 12,792,388 473 Fair value option securities — Residential agency mortgage-backed securities 19,050 — 19,050 — Residential mortgage loans held for sale 1 107,465 — 100,364 7,101 Mortgage servicing rights 2 333,246 — — 333,246 Derivative contracts, net of cash collateral 3 225,076 3,699 221,377 — Liabilities: Derivative contracts, net of cash collateral 3 287,509 658 286,851 — 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 79.41% of the unpaid principal balance. 2 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. 3 See 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, 2023 (in thousands): Total Quoted Prices in Active Markets for Identical Instruments (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs Assets: Trading securities: U.S. government securities $ 10,959 $ 9,017 $ 1,942 $ — Residential agency mortgage-backed securities 5,105,137 — 5,105,137 — Municipal securities 37,413 — 37,413 — Other trading securities 39,996 — 39,996 — Total trading securities 5,193,505 9,017 5,184,488 — Available for sale securities: U.S. Treasury 925 925 — — Municipal securities 502,833 — 502,833 — Residential agency mortgage-backed securities 6,834,720 — 6,834,720 — Residential non-agency mortgage-backed securities 799,877 — 799,877 — Commercial agency mortgage-backed securities 4,147,853 — 4,147,853 — Other debt securities 473 — — 473 Total available for sale securities 12,286,681 925 12,285,283 473 Fair value option securities — Residential agency mortgage-backed securities 20,671 — 20,671 — Residential mortgage loans held for sale 1 56,935 — 49,749 7,186 Mortgage servicing rights 2 293,884 — — 293,884 Derivative contracts, net of cash collateral 3 410,304 — 410,304 — Liabilities: Derivative contracts, net of cash collateral 3 587,473 2,607 584,866 — 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 77.74% of the unpaid principal balance. 2 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. 3 See 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 June 30, 2024 for which the fair value was adjusted during the six months ended June 30, 2024 (in thousands): Fair Value Adjustments for the Carrying Value at June 30, 2024 Three Months Ended Six Months Ended Quoted Prices Significant Significant 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 $ — $ 65 $ 10,065 $ 6,349 $ — $ 10,033 $ — 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 June 30, 2023 for which the fair value was adjusted during the six months ended June 30, 2023 (in thousands): Fair Value Adjustments for the Carrying Value at June 30, 2023 Three Months Ended Six Months Ended Quoted Prices Significant Significant 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 $ — $ — $ 12,048 $ 6,797 $ — $ 8,787 $ — Real estate and other repossessed assets — 547 — — — — (101) 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 June 30, 2024 follows (dollars in thousands): Fair Value Valuation Technique(s) Unobservable Input Range Nonaccruing loans $ 10,065 Discounted cash flows Management knowledge of industry and non-real estate collateral 4% - 90% (45%) 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 June 30, 2023 follows (dollars in thousands): Fair Value Valuation Technique(s) Unobservable Input Range Nonaccruing loans $ 12,048 Discounted cash flows Management knowledge of industry and non-real estate collateral 44% - 62% (58%) 1 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 June 30, 2024 (in thousands): Carrying Estimated Quoted Prices in Active Markets for Identical Instruments (Level 1) Significant Other Observable Inputs Significant Unobservable Inputs Cash and due from banks $ 897,811 $ 897,811 $ 897,811 $ — $ — Interest-bearing cash and cash equivalents 178,352 178,352 178,352 — — Trading securities: U.S. government securities 71,169 71,169 69,955 1,214 — Residential agency mortgage-backed securities 5,023,892 5,023,892 — 5,023,892 — Municipal securities 56,780 56,780 — 56,780 — Other trading securities 60,950 60,950 — 60,950 — Total trading securities 5,212,791 5,212,791 69,955 5,142,836 — Investment securities: Municipal securities 107,188 109,700 — 11,989 97,711 Residential agency mortgage-backed securities 1,990,626 1,786,096 — 1,786,096 — Commercial agency mortgage-backed securities 16,066 15,030 — 15,030 — Other debt securities 15,288 13,706 — 13,706 — Total investment securities 2,129,168 1,924,532 — 1,826,821 97,711 Allowance for credit losses (287) — — — — Investment securities, net of allowance 2,128,881 1,924,532 — 1,826,821 97,711 Available for sale securities: U.S. Treasury 923 923 923 — — Municipal securities 278,043 278,043 — 278,043 — Residential agency mortgage-backed securities 8,108,567 8,108,567 — 8,108,567 — Residential non-agency mortgage-backed securities 828,049 828,049 — 828,049 — Commercial agency mortgage-backed securities 3,577,729 3,577,729 — 3,577,729 — Other debt securities 473 473 — — 473 Total available for sale securities 12,793,784 12,793,784 923 12,792,388 473 Fair value option securities — Residential agency mortgage-backed securities 19,050 19,050 — 19,050 — Residential mortgage loans held for sale 107,465 107,465 — 100,364 7,101 Loans: Commercial 15,623,409 15,594,663 — — 15,594,663 Commercial real estate 5,083,575 4,988,792 — — 4,988,792 Loans to individuals 3,846,597 3,712,068 — — 3,712,068 Total loans 24,553,581 24,295,523 — — 24,295,523 Allowance for loan losses (287,826) — — — — Loans, net of allowance 24,265,755 24,295,523 — — 24,295,523 Mortgage servicing rights 333,246 333,246 — — 333,246 Derivative instruments with positive fair value, net of cash collateral 225,076 225,076 3,699 221,377 — Deposits with no stated maturity 32,777,709 32,777,709 — 32,777,709 — Time deposits 3,463,935 3,439,777 — — 3,439,777 Other borrowed funds 7,342,296 7,342,295 — — 7,342,295 Subordinated debentures 131,156 119,428 — 119,428 — Derivative instruments with negative fair value, net of cash collateral 287,509 287,509 658 286,851 — 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, 2023 (in thousands): Carrying Estimated Quoted Prices in Active Markets for Identical Instruments (Level 1) Significant Other Observable Inputs Significant Unobservable Inputs Cash and due from banks $ 947,613 $ 947,613 $ 947,613 $ — $ — Interest-bearing cash and cash equivalents 400,652 400,652 400,652 — — Trading securities: U.S. government securities 10,959 10,959 9,017 1,942 — Residential agency mortgage-backed securities 5,105,137 5,105,137 — 5,105,137 — Municipal securities 37,413 37,413 — 37,413 — Other trading securities 39,996 39,996 — 39,996 — Total trading securities 5,193,505 5,193,505 9,017 5,184,488 — Investment securities: Municipal securities 120,705 125,525 — 12,305 113,220 Residential agency mortgage-backed securities 2,092,083 1,917,810 — 1,917,810 — Commercial agency mortgage-backed securities 15,914 15,067 — 15,067 — Other debt securities 15,787 14,184 — 14,184 — Total investment securities 2,244,489 2,072,586 — 1,959,366 113,220 Allowance for credit losses (336) — — — — Investment securities, net of allowance 2,244,153 2,072,586 — 1,959,366 113,220 Available for sale securities: U.S. Treasury 925 925 925 — — Municipal securities 502,833 502,833 — 502,833 — Residential agency mortgage-backed securities 6,834,720 6,834,720 — 6,834,720 — Residential non-agency mortgage-backed securities 799,877 799,877 — 799,877 — Commercial agency mortgage-backed securities 4,147,853 4,147,853 — 4,147,853 — Other debt securities 473 473 — — 473 Total available for sale securities 12,286,681 12,286,681 925 12,285,283 473 Fair value option securities — Residential agency mortgage-backed securities 20,671 20,671 — 20,671 — Residential mortgage loans held for sale 56,935 56,935 — 49,749 7,186 Loans: Commercial 14,803,769 14,862,873 — — 14,862,873 Commercial real estate 5,337,647 5,270,657 — — 5,270,657 Loans to individuals 3,763,552 3,634,855 — — 3,634,855 Total loans 23,904,968 23,768,385 — — 23,768,385 Allowance for loan losses (277,123) — — — — Loans, net of allowance 23,627,845 23,768,385 — — 23,768,385 Mortgage servicing rights 293,884 293,884 — — 293,884 Derivative instruments with positive fair value, net of cash collateral 410,304 410,304 — 410,304 — Deposits with no stated maturity 31,007,679 31,007,679 — — 31,007,679 Time deposits 3,012,022 2,993,685 — — 2,993,685 Other borrowed funds 8,824,300 8,824,299 — — 8,824,299 Subordinated debentures 131,150 115,798 — 115,798 — Derivative instruments with negative fair value, net of cash collateral 587,473 587,473 2,607 584,866 — 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.

Subsequent Events

Subsequent Events	6 Months Ended
	Jun. 30, 2024
Subsequent Events [Abstract]
Subsequent Events [Text Block]	Subsequent Events The Company evaluated events from the date of the consolidated financial statements on June 30, 2024 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.

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Pay vs Performance Disclosure
Net Income (Loss) Attributable to Parent	$ 163,713	$ 151,308	$ 247,416	$ 313,676

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Jun. 30, 2024
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 second quarter of 2024. 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

Significant Accounting Polici_2

Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2024
Accounting Policies [Abstract]
Basis of Accounting, Policy [Policy Text Block]	The accompanying unaudited consolidated financial statements of BOK Financial 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, BOK Financial Securities, Inc. and BOK Financial Private Wealth, Inc. Operating divisions of BOKF, NA 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 ASU 2023-01, Leases (Topic 842): Common Control Arrangements 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 did not have a material impact on the Company's financial statements. FASB ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures The FASB issued ASU 2023-07 on November 27, 2023 which is intended to improve reportable segment disclosure requirements. Under previous guidance, while entities were required to disclose segment revenue and measure of profit or loss, there has been limited disclosure around the reporting of segment expenses. In addition to enhanced disclosures about significant segment expenses, the amendments enhance interim disclosure requirements, clarify circumstances in which an entity can disclose multiple segment measures of profit or loss, provide new segment disclosure requirements for entities with a single reportable segment, and contain other disclosure requirements. The purpose of the amendments is to enable investors to better understand an entity’s overall performance and assess potential future cash flows. ASU 2023-07 is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. The Company is evaluating the requirements of the expanded segment disclosures but does not expect the additional disclosures to have a material impact on the reported segment information. FASB ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures The FASB issued ASU 2023-09 on December 14, 2023 which amends income tax disclosures to provide information to better assess how an entity’s operations and related tax risks and tax planning and operational opportunities affect its tax rate and prospects for future cash flows. The new guidance requires the entity to disclose specific categories in the rate reconciliation and provide additional information for reconciling items that meet a quantitative threshold. ASU 2023-09 is effective for annual periods beginning after December 15, 2024. The Company is currently assessing the impact ASU 2023-09 will have on its income tax disclosures. FASB ASU 2024-01, Compensation—Stock Compensation (Topic 718): Scope Application of Profits Interest and Similar Awards The FASB issued ASU 2024-01 on March 21, 2024 which provides illustrative guidance to help entities determine whether profits interest and similar awards should be accounted for as share-based payment arrangements within the scope of Topic 718, Compensation—Stock Compensation . The ASU is effective for annual periods beginning after December 15, 2024, including interim periods within those periods. Adoption of ASU 2024-01 is not expected to have a material impact on the Company's financial statements.
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, interest rates, foreign exchange rates and other commodities 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 in the Consolidated Statements of Earnings. 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.
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 are 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 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% 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% of the committed dollars in the portfolio is calculated using charge-off migration. The expected credit loss on approximately 1% 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.
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 BOKF, NA. 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.

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities (Policies)	6 Months Ended
	Jun. 30, 2024
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, interest rates, foreign exchange rates and other commodities 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 in the Consolidated Statements of Earnings. 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.

Securities (Tables)

Securities (Tables)	6 Months Ended
	Jun. 30, 2024
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): June 30, 2024 December 31, 2023 Fair Value Net Unrealized Gain (Loss) Fair Value Net Unrealized Gain (Loss) U.S. government securities $ 71,169 $ 33 $ 10,959 $ 28 Residential agency mortgage-backed securities 5,023,892 5,742 5,105,137 98,124 Municipal securities 56,780 152 37,413 323 Other trading securities 60,950 83 39,996 160 Total trading securities $ 5,212,791 $ 6,010 $ 5,193,505 $ 98,635
Investment Securities (Held-to-Maturity) [Table Text Block]	The amortized cost and fair values of investment securities are as follows (in thousands): June 30, 2024 Amortized Carrying Fair Gross Unrealized Cost Value 1 Value Gain Loss Municipal securities $ 107,188 $ 107,188 $ 109,700 $ 2,976 $ (464) Mortgage-backed securities: Residential agency 2,129,826 1,990,626 1,786,096 91 (204,621) Commercial agency 17,258 16,066 15,030 — (1,036) Other debt securities 15,288 15,288 13,706 — (1,582) Total investment securities 2,269,560 2,129,168 1,924,532 3,067 (207,703) Allowance for credit losses (287) (287) — — — Investment securities, net of allowance $ 2,269,273 $ 2,128,881 $ 1,924,532 $ 3,067 $ (207,703) 1 Carrying value includes $140 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. December 31, 2023 Amortized Carrying Fair Gross Unrealized Cost Value 1 Value Gain Loss Municipal securities $ 120,705 $ 120,705 $ 125,525 $ 5,014 $ (194) Mortgage-backed securities: Residential agency 2,255,340 2,092,083 1,917,810 125 (174,398) Commercial agency 17,258 15,914 15,067 — (847) Other debt securities 15,787 15,787 14,184 — (1,603) Total investment securities 2,409,090 2,244,489 2,072,586 5,139 (177,042) Allowance for credit losses (336) (336) — — — Investment securities, net of allowance $ 2,408,754 $ 2,244,153 $ 2,072,586 $ 5,139 $ (177,042) 1 Carrying value includes $165 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 June 30, 2024, by contractual maturity, are as shown in the following table (dollars in thousands): Less than One to Six to Over Total Weighted Average Maturity 1 Fixed maturity debt securities: Carrying value $ 18,247 $ 101,521 $ 18,761 $ 13 $ 138,542 3.10 Fair value 18,397 102,988 17,038 13 138,436 Residential mortgage-backed securities: Carrying value $ 1,990,626 2 Fair value 1,786,096 Total investment securities: Carrying value $ 2,129,168 Fair value 1,924,532 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 4.9 years based upon current prepayment assumptions. Temporarily Impaired Investment Securities (dollars in thousands): June 30, 2024 Number of Securities Less Than 12 Months 12 Months or Longer Total Fair Unrealized Fair Unrealized Fair Unrealized Investment: Municipal securities 25 $ 16,795 $ 150 $ 7,679 $ 314 $ 24,474 $ 464 Mortgage-backed securities: Residential agency 116 — — 1,785,118 204,621 1,785,118 204,621 Commercial agency 2 — — 15,030 1,036 15,030 1,036 Other debt securities 3 — — 8,693 1,582 8,693 1,582 Total investment securities 146 $ 16,795 $ 150 $ 1,816,520 $ 207,553 $ 1,833,315 $ 207,703 December 31, 2023 Number of Securities Less Than 12 Months 12 Months or Longer Total Fair Unrealized Fair Unrealized Fair Unrealized Investment: Municipal securities 13 $ 1,931 $ 5 $ 6,600 $ 189 $ 8,531 $ 194 Mortgage-backed securities: Residential agency 116 — — 1,916,732 174,398 1,916,732 174,398 Commercial agency 2 — — 15,067 847 15,067 847 Other debt securities 3 — — 8,672 1,603 8,672 1,603 Total investment securities 134 $ 1,931 $ 5 $ 1,947,071 $ 177,037 $ 1,949,002 $ 177,042
Available For Sale Securities [Table Text Block]	The amortized cost and fair value of available for sale securities are as follows (in thousands): June 30, 2024 Amortized Fair Gross Unrealized Cost Value Gain Loss U.S. Treasury $ 1,000 $ 923 $ — $ (77) Municipal securities 301,294 278,043 — (23,251) Mortgage-backed securities: Residential agency 8,401,476 8,108,567 12,321 (305,230) Residential non-agency 870,162 828,049 10,441 (52,554) Commercial agency 3,868,588 3,577,729 816 (291,675) Other debt securities 500 473 — (27) Total available for sale securities $ 13,443,020 $ 12,793,784 $ 23,578 $ (672,814) December 31, 2023 Amortized Fair Gross Unrealized Cost Value Gain Loss U.S. Treasury $ 1,000 $ 925 $ — $ (75) Municipal securities 544,707 502,833 1 (41,875) Mortgage-backed securities: Residential agency 7,066,645 6,834,720 36,983 (268,908) Residential non-agency 833,535 799,877 12,865 (46,523) Commercial agency 4,456,918 4,147,853 2,972 (312,037) Other debt securities 500 473 — (27) Total available for sale securities $ 12,903,305 $ 12,286,681 $ 52,821 $ (669,445) The amortized cost and fair values of available for sale securities at June 30, 2024, by contractual maturity, are as shown in the following table (dollars in thousands): Less than One to Six to Over Total Weighted Average Maturity 1 Fixed maturity debt securities: Amortized cost $ 415,221 $ 2,459,948 $ 852,408 $ 443,805 $ 4,171,382 5.08 Fair value 411,548 2,242,456 780,072 423,092 3,857,168 Residential mortgage-backed securities: Amortized cost $ 9,271,637 2 Fair value 8,936,615 Total available for sale securities: Amortized cost $ 13,443,020 Fair value 12,793,784 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 4.3 years based upon current prepayment assumptions. Sales of available for sale securities resulted in gains and losses as follows (in thousands): Three Months Ended Six Months Ended June 30, 2024 2023 2024 2023 Proceeds $ 1,836 $ 135,489 $ 737,830 $ 135,489 Gross realized gains 222 703 455 703 Gross realized losses (188) (3,713) (45,592) (3,713) Related federal and state income tax expense (benefit) 8 (708) (10,616) (708)
Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value [Table Text Block]	June 30, 2024 Number of Securities Less Than 12 Months 12 Months or Longer Total Fair Unrealized Fair Unrealized Fair Unrealized Available for sale: U.S. Treasury 1 $ — $ — $ 923 $ 77 $ 923 $ 77 Municipal securities 130 11,009 58 257,764 23,193 268,773 23,251 Mortgage-backed securities: Residential agency 793 3,033,904 24,223 3,650,900 281,007 6,684,804 305,230 Residential non-agency 41 166,281 1,108 515,977 51,446 682,258 52,554 Commercial agency 240 183,004 2,009 3,151,499 289,666 3,334,503 291,675 Other debt securities 1 — — 473 27 473 27 Total available for sale securities 1,206 $ 3,394,198 $ 27,398 $ 7,577,536 $ 645,416 $ 10,971,734 $ 672,814 December 31, 2023 Number of Securities Less Than 12 Months 12 Months or Longer Total Fair Unrealized Fair Unrealized Fair Unrealized Available for sale: U.S. Treasury 1 $ — $ — $ 925 $ 75 $ 925 $ 75 Municipal securities 190 6,799 410 494,955 41,465 501,754 41,875 Mortgage-backed securities: Residential agency 630 690,118 3,689 3,717,975 265,219 4,408,093 268,908 Residential non-agency 32 116,077 1,244 451,370 45,279 567,447 46,523 Commercial agency 269 392,828 2,626 3,421,757 309,411 3,814,585 312,037 Other debt securities 1 — — 473 27 473 27 Total available for sale securities 1,123 $ 1,205,822 $ 7,969 $ 8,087,455 $ 661,476 $ 9,293,277 $ 669,445
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): June 30, 2024 December 31, 2023 Fair Value Net Unrealized Gain (Loss) Fair Value Net Unrealized Gain (Loss) Residential agency mortgage-backed securities $ 19,050 $ (1,805) $ 20,671 $ (1,406)

Derivatives (Tables)

Derivatives (Tables)	6 Months Ended
	Jun. 30, 2024
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 June 30, 2024 (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 $ 2,964,667 $ 109,692 $ (2,691) $ 107,001 $ (103,743) $ 3,258 Energy contracts 7,472,357 631,285 (435,236) 196,049 (38,770) 157,279 Foreign exchange contracts 35,606 35,451 — 35,451 (22) 35,429 Equity option contracts 1,593 158 — 158 (50) 108 Total customer risk management programs 10,474,223 776,586 (437,927) 338,659 (142,585) 196,074 Trading 25,238,831 82,976 (59,454) 23,522 (1,520) 22,002 Internal risk management programs 456,976 7,284 (284) 7,000 — 7,000 Total derivative contracts $ 36,170,030 $ 866,846 $ (497,665) $ 369,181 $ (144,105) $ 225,076 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 $ 2,964,667 $ 109,685 $ (2,691) $ 106,994 $ — $ 106,994 Energy contracts 7,851,998 619,809 (435,236) 184,573 (54,007) 130,566 Foreign exchange contracts 35,590 35,419 — 35,419 (34) 35,385 Equity option contracts 1,593 158 — 158 — 158 Total customer risk management programs 10,853,848 765,071 (437,927) 327,144 (54,041) 273,103 Trading 24,337,408 83,121 (59,454) 23,667 (10,545) 13,122 Internal risk management programs 79,617 1,568 (284) 1,284 — 1,284 Total derivative contracts $ 35,270,873 $ 849,760 $ (497,665) $ 352,095 $ (64,586) $ 287,509 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, 2023 (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 $ 2,754,476 $ 108,450 $ (6,810) $ 101,640 $ (94,608) $ 7,032 Energy contracts 7,846,190 836,425 (399,148) 437,277 (169,141) 268,136 Foreign exchange contracts 54,999 53,863 — 53,863 (872) 52,991 Equity option contracts 3,316 54 — 54 (44) 10 Total customer risk management programs 10,658,981 998,792 (405,958) 592,834 (264,665) 328,169 Trading 16,264,818 118,545 (37,111) 81,434 (6,996) 74,438 Internal risk management programs 425,014 7,697 — 7,697 — 7,697 Total derivative contracts $ 27,348,813 $ 1,125,034 $ (443,069) $ 681,965 $ (271,661) $ 410,304 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 $ 2,754,476 $ 108,402 $ (6,810) $ 101,592 $ — $ 101,592 Energy contracts 8,254,004 831,467 (399,148) 432,319 (6,441) 425,878 Foreign exchange contracts 54,405 53,065 — 53,065 — 53,065 Equity option contracts 3,316 54 — 54 — 54 Total customer risk management programs 11,066,201 992,988 (405,958) 587,030 (6,441) 580,589 Trading 20,644,156 224,648 (37,111) 187,537 (181,917) 5,620 Internal risk management programs 2,244 1,264 — 1,264 — 1,264 Total derivative contracts $ 31,712,601 $ 1,218,900 $ (443,069) $ 775,831 $ (188,358) $ 587,473 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 June 30, 2024 June 30, 2023 Brokerage Gain (Loss) on Derivatives, Net Brokerage Gain (Loss) on Derivatives, Net Customer risk management programs: Interest rate contracts $ 547 $ — $ 2,339 $ — Energy contracts 6,162 — 11,250 — Foreign exchange contracts 56 — 53 — Equity option contracts — — — — Total customer risk management programs 6,765 — 13,642 — Trading 1 32,576 — 64,172 — Internal risk management programs — (1,091) — (8,159) Total derivative contracts $ 39,341 $ (1,091) $ 77,814 $ (8,159) 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. Six Months Ended June 30, 2024 June 30, 2023 Brokerage Gain (Loss) on Derivatives, Net Brokerage Gain (Loss) on Derivatives, Net Customer risk management programs: Interest rate contracts 3,007 — 4,109 — Energy contracts 9,977 — 17,803 — Foreign exchange contracts 106 — 84 — Equity option contracts — — — — Total customer risk management programs 13,090 — 21,996 — Trading 1 116,282 — 1,079 — Internal risk management programs — (9,724) — (9,503) Total derivative contracts $ 129,372 $ (9,724) $ 23,075 $ (9,503) 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.

Loans and Allowances for Cred_2

Loans and Allowances for Credit Losses (Tables)	6 Months Ended
	Jun. 30, 2024
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): June 30, 2024 December 31, 2023 Fixed Variable Non-accrual Total Fixed Variable Non-accrual Total Commercial $ 3,604,024 $ 11,960,951 $ 58,434 $ 15,623,409 $ 3,558,563 $ 11,135,075 $ 110,131 $ 14,803,769 Commercial real estate 756,055 4,314,637 12,883 5,083,575 791,757 4,538,570 7,320 5,337,647 Loans to individuals 2,428,707 1,398,524 19,366 3,846,597 2,282,914 1,452,620 28,018 3,763,552 Total $ 6,788,786 $ 17,674,112 $ 90,683 $ 24,553,581 $ 6,633,234 $ 17,126,265 $ 145,469 $ 23,904,968
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 June 30, 2024 Commercial Commercial Real Estate Loans to Individuals Total Allowance for loan losses: Beginning balance $ 146,267 $ 97,479 $ 37,877 $ 281,623 Provision for loan losses 10,441 (1,042) 3,749 13,148 Loans charged off (6,391) (205) (1,344) (7,940) Recoveries of loans previously charged off 420 24 551 995 Ending balance $ 150,737 $ 96,256 $ 40,833 $ 287,826 Allowance for off-balance sheet credit risk from unfunded loan commitments: Beginning balance $ 17,790 $ 27,865 $ 1,664 $ 47,319 Provision for off-balance sheet credit risk (474) (4,551) 42 (4,983) Ending balance $ 17,316 $ 23,314 $ 1,706 $ 42,336 Six Months Ended June 30, 2024 Commercial Commercial Real Estate Loans to Individuals Total Allowance for loan losses: Beginning balance $ 141,232 $ 94,718 $ 41,173 $ 277,123 Provision for loan losses 18,752 2,953 1,403 23,108 Loans charged off (10,631) (1,455) (2,914) (15,000) Recoveries of loans previously charged off 1,384 40 1,171 2,595 Ending balance $ 150,737 $ 96,256 $ 40,833 $ 287,826 Allowance for off-balance sheet credit risk from unfunded loan commitments: Beginning balance $ 19,762 $ 27,439 $ 1,776 $ 48,977 Provision for off-balance sheet credit risk (2,446) (4,125) (70) (6,641) Ending balance $ 17,316 $ 23,314 $ 1,706 $ 42,336 Three Months Ended June 30, 2023 Commercial Commercial Real Estate Loans to Individuals Total Allowance for loan losses: Beginning balance $ 139,898 $ 66,003 $ 43,559 $ 249,460 Provision for loan losses 5,420 14,300 237 19,957 Loans charged off (2,797) (4,000) (1,252) (8,049) Recoveries of loans previously charged off 748 44 554 1,346 Ending balance $ 143,269 $ 76,347 $ 43,098 $ 262,714 Allowance for off-balance sheet credit risk from unfunded loan commitments: Beginning balance $ 20,608 $ 40,211 $ 2,124 $ 62,943 Provision for off-balance sheet credit risk (314) (2,530) (159) (3,003) Ending balance $ 20,294 $ 37,681 $ 1,965 $ 59,940 Six Months Ended June 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 11,750 24,726 (1,994) 34,482 Loans charged off (2,809) (6,208) (2,699) (11,716) Recoveries of loans previously charged off 2,742 181 1,321 4,244 Ending balance $ 143,269 $ 76,347 $ 43,098 $ 262,714 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 2,048 (2,809) (218) (979) Ending balance $ 20,294 $ 37,681 $ 1,965 $ 59,940 An $8.0 million provision for credit losses was necessary for the second quarter of 2024, reflecting continued loan growth and a stable economic outlook. The allowance for loan losses and recorded investment of the related loans by portfolio segment for each measurement method at June 30, 2024 is as follows (in thousands): Collectively Measured Individually Measured Total Recorded Investment Related Allowance Recorded Investment Related Allowance Recorded Investment Related Commercial $ 15,564,975 $ 148,523 $ 58,434 $ 2,214 $ 15,623,409 $ 150,737 Commercial real estate 5,070,692 96,256 12,883 — 5,083,575 96,256 Loans to individuals 3,827,231 40,833 19,366 — 3,846,597 40,833 Total $ 24,462,898 $ 285,612 $ 90,683 $ 2,214 $ 24,553,581 $ 287,826 The allowance for loan losses and recorded investment of the related loans by portfolio segment for each measurement method at December 31, 2023 is as follows (in thousands): Collectively Measured Individually Measured Total Recorded Investment Related Allowance Recorded Investment Related Allowance Recorded Investment Related Commercial $ 14,693,638 $ 138,540 $ 110,131 $ 2,692 $ 14,803,769 $ 141,232 Commercial real estate 5,330,327 94,718 7,320 — 5,337,647 94,718 Loans to individuals 3,735,534 41,173 28,018 — 3,763,552 41,173 Total $ 23,759,499 $ 274,431 $ 145,469 $ 2,692 $ 23,904,968 $ 277,123
Schedule of Credit Quality Indicators [Table Text Block]	The following table summarizes the Company’s loan portfolio at June 30, 2024 by the risk grade categories and vintage (in thousands): Origination Year 2024 2023 2022 2021 2020 Prior Revolving Loans Revolving Loans Converted to Term Loans Total Commercial: Healthcare Pass $ 275,268 $ 625,281 $ 921,843 $ 565,653 $ 379,669 $ 992,889 $ 262,814 $ 12 $ 4,023,429 Special Mention — 15,000 31,907 1,178 — 49,823 505 — 98,413 Accruing Substandard — — 110 18,287 58,103 10,896 975 — 88,371 Nonaccrual — 1,375 237 — — 19,233 — — 20,845 Total healthcare 275,268 641,656 954,097 585,118 437,772 1,072,841 264,294 12 4,231,058 Loans charged off, year-to-date — — — — — 6,840 — — 6,840 Services Pass 330,400 735,946 506,992 350,009 211,087 691,191 704,785 459 3,530,869 Special Mention — 1,814 1,035 898 — 8,330 1,758 — 13,835 Accruing Substandard — — 17,437 147 1,607 8,929 436 719 29,275 Nonaccrual — — — 1,361 363 — 1,441 — 3,165 Total services 330,400 737,760 525,464 352,415 213,057 708,450 708,420 1,178 3,577,144 Loans charged off, year-to-date — — — — 10 — 9 — 19 Energy Pass 55,874 103,305 78,634 2,707 7,288 20,140 3,123,257 — 3,391,205 Special Mention — — — — — — 17,662 — 17,662 Accruing Substandard — — — — — — 13,950 — 13,950 Nonaccrual — — — — — 80 28,588 — 28,668 Total energy 55,874 103,305 78,634 2,707 7,288 20,220 3,183,457 — 3,451,485 Loans charged off, year-to-date — — — — — — — — — General business Pass 543,566 741,365 376,769 191,698 128,816 346,596 1,918,875 1,733 4,249,418 Special Mention 2,488 15,760 5,201 11,765 535 1,764 9,307 — 46,820 Accruing Substandard — 4,090 38,900 1,542 1,193 6,539 9,301 163 61,728 Nonaccrual — 994 66 — — 35 4,658 3 5,756 Total general business 546,054 762,209 420,936 205,005 130,544 354,934 1,942,141 1,899 4,363,722 Loans charged off, year-to-date — 27 1,399 — — 158 2,182 6 3,772 Total commercial 1,207,596 2,244,930 1,979,131 1,145,245 788,661 2,156,445 6,098,312 3,089 15,623,409 Commercial real estate: Pass 39,377 449,401 2,084,982 919,126 343,462 1,025,082 136,787 — 4,998,217 Special Mention — 403 14,907 32,131 — 16,949 — — 64,390 Accruing Substandard — — — — — 8,085 — — 8,085 Nonaccrual — 2,885 — — — 9,998 — — 12,883 Total commercial real estate 39,377 452,689 2,099,889 951,257 343,462 1,060,114 136,787 — 5,083,575 Loans charged off, year-to-date — — — — — 1,455 — — 1,455 Origination Year 2024 2023 2022 2021 2020 Prior Revolving Loans Revolving Loans Converted to Term Loans Total Loans to individuals: Residential mortgage Pass 249,631 377,061 308,510 330,796 332,439 267,548 378,185 21,123 2,265,293 Special Mention — 42 193 176 — 155 1,575 — 2,141 Accruing Substandard — 49 — 3 — — 1,113 — 1,165 Nonaccrual — 107 433 434 510 8,218 2,377 548 12,627 Total residential mortgage 249,631 377,259 309,136 331,409 332,949 275,921 383,250 21,671 2,281,226 Loans charged off, year-to-date — — — — — 5 9 — 14 Residential mortgage guaranteed by U.S. government agencies Pass — 893 3,466 2,727 3,982 114,140 — — 125,208 Nonaccrual — — — — 280 6,337 — — 6,617 Total residential mortgage guaranteed by U.S. government agencies — 893 3,466 2,727 4,262 120,477 — — 131,825 Personal Pass 148,880 180,029 187,435 133,383 110,809 171,280 499,184 92 1,431,092 Special Mention — 28 35 65 15 2 1 — 146 Accruing Substandard — 30 12 3 7 144 1,990 — 2,186 Nonaccrual — 26 44 11 9 8 24 — 122 Total personal 148,880 180,113 187,526 133,462 110,840 171,434 501,199 92 1,433,546 Loans charged off, year-to-date 1 2,732 51 45 26 — — 26 20 2,900 Total loans to individuals 398,511 558,265 500,128 467,598 448,051 567,832 884,449 21,763 3,846,597 Total loans $ 1,645,484 $ 3,255,884 $ 4,579,148 $ 2,564,100 $ 1,580,174 $ 3,784,391 $ 7,119,548 $ 24,852 $ 24,553,581 1 Includes charge-offs on deposit overdrafts, which are generally charged off at 60 days past due. The following table summarizes the Company's loan portfolio at December 31, 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: Healthcare Pass 650,768 895,602 590,736 409,001 331,897 809,858 281,378 15 3,969,255 Special Mention — — — 21,791 — 31,235 5 — 53,031 Accruing Substandard — 2,128 18,508 6,911 — 10,896 975 — 39,418 Nonaccrual — — — 30,290 23,129 28,110 — — 81,529 Total healthcare 650,768 897,730 609,244 467,993 355,026 880,099 282,358 15 4,143,233 Loans charged off, year-to-date — — — — 2,500 — — — 2,500 Services Pass 900,090 526,776 401,872 228,818 106,112 643,477 730,729 595 3,538,469 Special Mention — 1,085 1,520 1,341 534 4,522 81 — 9,083 Accruing Substandard — 13,712 178 326 3,972 3,746 3,108 13 25,055 Nonaccrual — — 1,635 338 — — 1,643 — 3,616 Total services 900,090 541,573 405,205 230,823 110,618 651,745 735,561 608 3,576,223 Loans charged off, year-to-date — — 3,060 — — — 2,642 — 5,702 Energy Pass $ 190,122 $ 100,006 $ 43,769 $ 7,876 $ 9,562 $ 11,583 $ 3,025,590 $ — $ 3,388,508 Special Mention — — — — — — 13,950 — 13,950 Accruing Substandard — — — — — — 16,800 — 16,800 Nonaccrual — — — — — 99 17,744 — 17,843 Total energy 190,122 100,006 43,769 7,876 9,562 11,682 3,074,084 — 3,437,101 General business Pass 942,468 436,832 224,735 138,951 101,100 287,744 1,389,128 2,164 3,523,122 Special Mention 10,264 16,167 8,420 1,253 321 8,295 897 — 45,617 Accruing Substandard 4,401 33,194 1,716 27 — — 31,992 — 71,330 Nonaccrual — 1,134 — — — 48 5,956 5 7,143 Total general business 957,133 487,327 234,871 140,231 101,421 296,087 1,427,973 2,169 3,647,212 Loans charged off, year-to-date — — 4,598 2 — 48 10 38 4,696 Total commercial 2,698,113 2,026,636 1,293,089 846,923 576,627 1,839,613 5,519,976 2,792 14,803,769 Commercial real estate: Pass 396,891 1,941,913 1,194,759 416,647 513,555 705,092 136,095 — 5,304,952 Special Mention — 476 — — — 19,171 — — 19,647 Accruing Substandard 2,992 — 3 — — 2,733 — — 5,728 Nonaccrual — — — — 7,170 150 — — 7,320 Total commercial real estate 399,883 1,942,389 1,194,762 416,647 520,725 727,146 136,095 — 5,337,647 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 426,089 320,733 342,927 349,742 54,801 243,356 375,739 23,895 2,137,282 Special Mention 157 140 131 1,361 18 134 2,982 93 5,016 Accruing Substandard — 150 — — 37 49 50 — 286 Nonaccrual 79 1,419 237 544 344 12,381 2,387 665 18,056 Total residential mortgage 426,325 322,442 343,295 351,647 55,200 255,920 381,158 24,653 2,160,640 Loans charged off, year-to-date — — 51 4 — 17 — 1 73 Residential mortgage guaranteed by U.S. government agencies Pass 633 1,788 2,220 4,297 6,441 124,719 — — 140,098 Nonaccrual — — — 280 375 9,054 — — 9,709 Total residential mortgage guaranteed by U.S. government agencies 633 1,788 2,220 4,577 6,816 133,773 — — 149,807 Personal Pass 218,401 229,580 149,291 136,215 75,348 137,629 503,841 145 1,450,450 Special Mention 66 39 106 30 8 — 1,918 3 2,170 Accruing Substandard — 64 12 9 144 — 3 — 232 Nonaccrual 4 51 9 16 3 12 158 — 253 Total personal 218,471 229,734 149,418 136,270 75,503 137,641 505,920 148 1,453,105 Loans charged off, year-to-date 1 5,636 82 96 43 — 10 6 26 5,899 Total loans to individuals 645,429 553,964 494,933 492,494 137,519 527,334 887,078 24,801 3,763,552 Total loans $ 3,743,425 $ 4,522,989 $ 2,982,784 $ 1,756,064 $ 1,234,871 $ 3,094,093 $ 6,543,149 $ 27,593 $ 23,904,968 1 Includes charge-offs on deposit overdrafts, which are generally charged off at 60 days past due.
Financing Receivable, Nonaccrual [Table Text Block]	A summary of nonaccruing loans at June 30, 2024 follows (in thousands): As of June 30, 2024 Total With No With Allowance Related Allowance Commercial: Healthcare $ 20,845 $ 10,930 $ 9,915 $ 1,700 Services 3,165 1,521 1,644 441 Energy 28,668 28,668 — — General business 5,756 5,618 138 73 Total commercial 58,434 46,737 11,697 2,214 Commercial real estate 12,883 12,883 — — Loans to individuals: Residential mortgage 12,627 12,627 — — Residential mortgage guaranteed by U.S. government agencies 6,617 6,617 — — Personal 122 122 — — Total loans to individuals 19,366 19,366 — — Total $ 90,683 $ 78,986 $ 11,697 $ 2,214 A summary of nonaccruing loans at December 31, 2023 follows (in thousands): As of December 31, 2023 Total With No With Allowance Related Allowance Commercial: Healthcare $ 81,529 $ 40,372 $ 41,157 $ 1,478 Services 3,616 1,684 1,932 1,214 Energy 17,843 17,843 — — General business 7,143 7,143 — — Total commercial 110,131 67,042 43,089 2,692 Commercial real estate 7,320 7,320 — — Loans to individuals: Residential mortgage 18,056 18,056 — — Residential mortgage guaranteed by U.S. government agencies 9,709 9,709 — — Personal 253 253 — — Total loans to individuals 28,018 28,018 — — Total $ 145,469 $ 102,380 $ 43,089 $ 2,692
Summary of Loans by Aging Status [Table Text Block]	A summary of loans currently performing and past due as of June 30, 2024 is as follows (in thousands): Past Due Past Due 90 Days or More and Accruing Current 30 to 59 60 to 89 Days 90 Days Total Commercial: Healthcare $ 4,214,505 $ 1,375 $ 4,415 $ 10,763 $ 4,231,058 $ — Services 3,575,551 — 1,158 435 3,577,144 72 Energy 3,451,485 — — — 3,451,485 — General business 4,354,147 1,044 163 8,368 4,363,722 2,794 Total commercial 15,595,688 2,419 5,736 19,566 15,623,409 2,866 Commercial real estate 5,073,416 — 3,021 7,138 5,083,575 — Loans to individuals: Residential mortgage 2,267,945 9,907 1,615 1,759 2,281,226 97 Residential mortgage guaranteed by U.S. government agencies 40,693 23,918 15,796 51,418 131,825 46,579 Personal 1,432,561 933 52 — 1,433,546 — Total loans to individuals 3,741,199 34,758 17,463 53,177 3,846,597 46,676 Total $ 24,410,303 $ 37,177 $ 26,220 $ 79,881 $ 24,553,581 $ 49,542 A summary of loans currently performing and past due as of December 31, 2023 is as follows (in thousands): Past Due Past Due 90 Days or More and Accruing Current 30 to 59 60 to 89 Days 90 Days Total Commercial: Healthcare $ 4,071,336 $ 18,019 $ 30,290 $ 23,588 $ 4,143,233 $ — Services 3,575,787 2 — 434 3,576,223 — Energy 3,437,101 — — — 3,437,101 — General business 3,639,775 412 1,157 5,868 3,647,212 — Total commercial 14,723,999 18,433 31,447 29,890 14,803,769 — Commercial real estate 5,327,481 2,992 — 7,174 5,337,647 3 Loans to individuals: Residential mortgage 2,149,927 6,340 1,494 2,879 2,160,640 36 Residential mortgage guaranteed by U.S. government agencies 54,122 25,085 17,053 53,547 149,807 48,201 Personal 1,450,302 2,561 88 154 1,453,105 131 Total loans to individuals 3,654,351 33,986 18,635 56,580 3,763,552 48,368 Total $ 23,705,831 $ 55,411 $ 50,082 $ 93,644 $ 23,904,968 $ 48,371

Mortgage Banking Activities (Ta

Mortgage Banking Activities (Tables)	6 Months Ended
	Jun. 30, 2024
Mortgage Banking [Abstract]
Components of Residential Mortgage Loans Held For Sale [Table Text Block]	June 30, 2024 December 31, 2023 Unpaid Principal Balance/ Fair Value Unpaid Principal Balance/ Fair Value Residential mortgage loans held for sale $ 105,922 $ 105,706 $ 56,922 $ 56,457 Residential mortgage loan commitments 62,960 1,945 34,783 1,379 Forward sales contracts 127,010 (186) 75,448 (901) $ 107,465 $ 56,935
Mortgage Banking Revenue [Table Text Block]	Mortgage banking revenue was as follows (in thousands): Three Months Ended Six Months Ended 2024 2023 2024 2023 Production revenue: Net realized gains (losses) on sale of mortgage loans $ 2,338 $ (296) $ 4,364 $ (2,027) Net change in unrealized gain (loss) on mortgage loans held for sale 631 (496) 249 (126) Net change in the fair value of mortgage loan commitments (528) (865) 566 775 Net change in the fair value of forward sales contracts (72) 1,373 715 461 Total production revenue (loss) 2,369 (284) 5,894 (917) Servicing revenue 16,259 15,425 31,701 30,425 Total mortgage banking revenue $ 18,628 $ 15,141 $ 37,595 $ 29,508
Summary of Mortgage Servicing Rights [Table Text Block]	The following represents a summary of mortgage servicing rights (dollars in thousands): June 30, 2024 December 31, 2023 Number of residential mortgage loans serviced for others 125,698 115,967 Outstanding principal balance of residential mortgage loans serviced for others $ 22,188,347 $ 20,382,192 Weighted average interest rate 3.68 % 3.64 % Remaining term (in months) 278 280
Activity in Capitalized Mortgage Servicing Rights [Table Text Block]	The following represents activity in capitalized mortgage servicing rights (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 Beginning Balance $ 319,330 $ 299,803 $ 293,884 $ 277,608 Additions 4,454 4,103 6,970 6,603 Acquisitions 14,021 — 31,421 31,138 Change in fair value due to principal payments (8,012) (8,445) (13,459) (13,829) Change in fair value due to market assumption changes 3,453 9,261 14,430 3,202 Ending Balance $ 333,246 $ 304,722 $ 333,246 $ 304,722
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: June 30, 2024 December 31, 2023 Discount rate – risk-free rate plus a market premium 9.91% 9.72% Prepayment rate – based upon loan interest rate, original term and loan type 6.75% 7.34% Loan servicing costs – annually per loan based upon loan type: Performing loans $73 - $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 4.38% 3.90% Primary/secondary mortgage rate spread 115 bps 105 bps Delinquency rate 2.48% 2.06%

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	6 Months Ended
	Jun. 30, 2024
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 Total Balance, Dec. 31, 2022 $ (664,618) $ (172,337) (836,955) Net change in unrealized gain (loss) (36,363) — (36,363) Reclassification adjustments included in earnings: Interest revenue, Investment securities — 32,084 32,084 Loss on available for sale securities, net 3,010 — 3,010 Other comprehensive income (loss), before income taxes (33,353) 32,084 (1,269) Federal and state income taxes (8,839) 7,287 (1,552) Other comprehensive income (loss), net of income taxes (24,514) 24,797 283 Balance, June 30, 2023 $ (689,132) $ (147,540) $ (836,672) Balance, Dec. 31, 2023 $ (473,212) $ (125,888) $ (599,100) Net change in unrealized gain (loss) (77,749) — (77,749) Reclassification adjustments included in earnings: Interest revenue, Investment securities — 24,210 24,210 Loss on available for sale securities, net 45,137 — 45,137 Other comprehensive income (loss), before income taxes (32,612) 24,210 (8,402) Federal and state income taxes (7,695) 5,695 (2,000) Other comprehensive income (loss), net of income taxes (24,917) 18,515 (6,402) Balance, June 30, 2024 $ (498,129) $ (107,373) $ (605,502)

Earnings Per Share (Tables)

Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2024
Earnings Per Share [Abstract]
Earnings Per Share [Table Text Block]	(In thousands, except share and per share amounts) Three Months Ended June 30, Six Months Ended 2024 2023 2024 2023 Numerator: Net income attributable to BOK Financial Corp. shareholders $ 163,713 $ 151,308 $ 247,416 $ 313,676 Less: Earnings allocated to participating securities 1,602 1,202 2,278 2,457 Numerator for basic earnings per share – income available to common shareholders 162,111 150,106 245,138 311,219 Effect of reallocating undistributed earnings of participating securities — — — — Numerator for diluted earnings per share – income available to common shareholders $ 162,111 $ 150,106 $ 245,138 $ 311,219 Denominator: Weighted average shares outstanding 64,343,898 66,521,728 64,578,226 66,684,603 Less: Participating securities included in weighted average shares outstanding 629,694 527,596 576,072 522,555 Denominator for basic earnings per common share 63,714,204 65,994,132 64,002,154 66,162,048 Dilutive effect of employee stock compensation plans — — — — Denominator for diluted earnings per common share 63,714,204 65,994,132 64,002,154 66,162,048 Basic earnings per share $ 2.54 $ 2.27 $ 3.83 $ 4.70 Diluted earnings per share $ 2.54 $ 2.27 $ 3.83 $ 4.70

Reportable Segments (Tables)

Reportable Segments (Tables)	6 Months Ended
	Jun. 30, 2024
Segment Reporting [Abstract]
Reportable Segments [Table Text Block]	Reportable segments reconciliation to the Consolidated Financial Statements for the three months ended June 30, 2024 is as follows (in thousands): Commercial Consumer Wealth Funds Management and Other BOK Net interest income from external sources $ 283,328 $ 6,192 $ 2,612 $ 3,889 $ 296,021 Net interest income (expense) from internal sources (79,593) 58,972 26,889 (6,268) — Net interest income 203,735 65,164 29,501 (2,379) 296,021 Net loans charged off and provision for credit losses 6,134 1,247 — 619 8,000 Net interest income after provision for credit losses 197,601 63,917 29,501 (2,998) 288,021 Other operating revenue 54,536 36,252 113,208 55,708 259,704 Other operating expense 76,114 55,128 90,214 115,234 336,690 Net direct contribution 176,023 45,041 52,495 (62,524) 211,035 Gain (loss) on financial instruments, net 168 (3,577) — 3,409 — Change in fair value of mortgage servicing rights — 3,453 — (3,453) — Gain on repossessed assets, net — 9 — (9) — Corporate expense allocations 17,381 13,392 16,484 (47,257) — Net income before taxes 158,810 31,534 36,011 (15,320) 211,035 Federal and state income taxes 39,247 7,417 8,514 (7,875) 47,303 Net income 119,563 24,117 27,497 (7,445) 163,732 Net income attributable to non-controlling interests — — — 19 19 Net income attributable to BOK Financial Corp. shareholders $ 119,563 $ 24,117 $ 27,497 $ (7,464) $ 163,713 Average assets $ 30,305,613 $ 9,630,470 $ 16,452,098 $ (5,192,982) $ 51,195,199 Reportable segments reconciliation to the Consolidated Financial Statements for the six months ended June 30, 2024 is as follows (in thousands): Commercial Consumer Wealth Funds Management and Other BOK Net interest income from external sources $ 566,084 $ 13,542 $ 9,611 $ 356 $ 589,593 Net interest income (expense) from internal sources (158,354) 115,757 48,288 (5,691) — Net interest income 407,730 129,299 57,899 (5,335) 589,593 Net loans charged off and provision for credit losses 10,294 3,055 (15) 2,666 16,000 Net interest income after provision for credit losses 397,436 126,244 57,914 (8,001) 573,593 Other operating revenue 104,542 72,459 231,912 12,492 421,405 Other operating expense 146,209 108,575 189,502 232,788 677,074 Net direct contribution 355,769 90,128 100,324 (228,297) 317,924 Gain (loss) on financial instruments, net 335 (13,240) — 12,905 — Change in fair value of mortgage servicing rights — 14,430 — (14,430) — Gain on repossessed assets, net — 116 — (116) — Corporate expense allocations 35,778 27,564 31,263 (94,605) — Net income (loss) before taxes 320,326 63,870 69,061 (135,333) 317,924 Federal and state income taxes 78,966 15,022 16,336 (39,826) 70,498 Net income (loss) 241,360 48,848 52,725 (95,507) 247,426 Net income attributable to non-controlling interests — — — 10 10 Net income attributable to BOK Financial Corp. shareholders $ 241,360 $ 48,848 $ 52,725 $ (95,517) $ 247,416 Average assets $ 30,056,215 $ 9,511,225 $ 16,105,713 $ (5,061,768) $ 50,611,385 Reportable segments reconciliation to the Consolidated Financial Statements for the three months ended June 30, 2023 is as follows (in thousands): Commercial Consumer Wealth Funds Management and Other BOK Net interest income from external sources $ 299,712 $ 17,828 $ 4,415 $ 306 $ 322,261 Net interest income (expense) from internal sources (77,975) 50,260 29,426 (1,711) — Net interest income 221,737 68,088 33,841 (1,405) 322,261 Net loans charged off and provision for credit losses 6,000 1,129 (45) 9,916 17,000 Net interest income after provision for credit losses 215,737 66,959 33,886 (11,321) 305,261 Other operating revenue 68,828 32,277 123,043 (15,099) 209,049 Other operating expense 77,559 52,340 84,587 104,187 318,673 Net direct contribution 207,006 46,896 72,342 (130,607) 195,637 Gain (loss) on financial instruments, net 231 (10,257) — 10,026 — Change in fair value of mortgage servicing rights — 9,261 — (9,261) — Gain on repossessed assets, net 408 — — (408) — Corporate expense allocations 21,404 12,318 12,784 (46,506) — Net income before taxes 186,241 33,582 59,558 (83,744) 195,637 Federal and state income taxes 45,462 7,898 14,056 (23,415) 44,001 Net income 140,779 25,684 45,502 (60,329) 151,636 Net income attributable to non-controlling interests — — — 328 328 Net income attributable to BOK Financial Corp. shareholders $ 140,779 $ 25,684 $ 45,502 $ (60,657) $ 151,308 Average assets $ 28,170,869 $ 9,597,723 $ 12,949,258 $ (2,809,743) $ 47,908,107 Reportable segments reconciliation to the Consolidated Financial Statements for the six months ended June 30, 2023 is as follows (in thousands): Commercial Consumer Wealth Funds Management and Other BOK Net interest income from external sources $ 587,970 $ 38,974 $ 25,355 $ 22,310 $ 674,609 Net interest income (expense) from internal sources (139,134) 96,324 44,087 (1,277) — Net interest income 448,836 135,298 69,442 21,033 674,609 Net loans charged off and provision for credit losses 6,076 2,313 (69) 24,680 33,000 Net interest income after provision for credit losses 442,760 132,985 69,511 (3,647) 641,609 Other operating revenue 125,673 62,887 231,954 (33,600) 386,914 Other operating expense 150,693 102,538 166,342 204,912 624,485 Net direct contribution 417,740 93,334 135,123 (242,159) 404,038 Gain (loss) on financial instruments, net 173 (14,930) — 14,757 — Change in fair value of mortgage servicing rights — 3,202 — (3,202) — Gain on repossessed assets, net 1,267 14 — (1,281) — Corporate expense allocations 39,122 23,940 25,310 (88,372) — Net income before taxes 380,058 57,680 109,813 (143,513) 404,038 Federal and state income taxes 92,610 13,566 25,927 (42,197) 89,906 Net income 287,448 44,114 83,886 (101,316) 314,132 Net income attributable to non-controlling interests — — — 456 456 Net income attributable to BOK Financial Corp. shareholders $ 287,448 $ 44,114 $ 83,886 $ (101,772) $ 313,676 Average assets $ 28,166,923 $ 9,765,186 $ 12,309,730 $ (3,291,232) $ 46,950,607

Fees and Commissions Revenue _2

Fees and Commissions Revenue Fees and Commissions Rvenue (Tables)	6 Months Ended
	Jun. 30, 2024
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 June 30, 2024 (in thousands): Commercial Consumer Wealth Management Funds Management & Other Consolidated Out of Scope 1 In Scope 2 Trading revenue $ — $ — $ 27,695 $ — $ 27,695 $ 27,695 $ — Customer hedging revenue 3,408 — 3,047 310 6,765 6,765 — Retail brokerage revenue — — 4,838 — 4,838 — 4,838 Investment banking revenue 4,106 — 9,613 — 13,719 3,942 9,777 Brokerage and trading revenue 7,514 — 45,193 310 53,017 38,402 14,615 TransFund EFT network revenue 21,883 776 (19) — 22,640 — 22,640 Merchant services revenue 2,502 8 — — 2,510 — 2,510 Corporate card revenue 1,868 — 161 67 2,096 — 2,096 Transaction card revenue 26,253 784 142 67 27,246 — 27,246 Personal trust revenue — — 26,770 — 26,770 — 26,770 Corporate trust revenue — — 8,646 — 8,646 — 8,646 Institutional trust & retirement plan services revenue — — 16,519 — 16,519 — 16,519 Investment management services and other revenue — — 5,641 — 5,641 — 5,641 Fiduciary and asset management revenue — — 57,576 — 57,576 — 57,576 Commercial account service charge revenue 15,395 552 603 — 16,550 — 16,550 Overdraft fee revenue 27 5,374 32 — 5,433 — 5,433 Check card revenue — 6,049 — — 6,049 — 6,049 Automated service charge and other deposit fee revenue 259 1,189 92 — 1,540 — 1,540 Deposit service charges and fees 15,681 13,164 727 — 29,572 — 29,572 Mortgage production revenue — 2,369 — — 2,369 2,369 — Mortgage servicing revenue — 16,964 — (705) 16,259 16,259 — Mortgage banking revenue — 19,333 — (705) 18,628 18,628 — Other revenue 4,272 2,971 9,570 (2,825) 13,988 8,400 5,588 Total fees and commissions revenue $ 53,720 $ 36,252 $ 113,208 $ (3,153) $ 200,027 $ 65,430 $ 134,597 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 six months ended June 30, 2024 (in thousands): Commercial Consumer Wealth Management Funds Management & Other Consolidated Out of Scope 1 In Scope 2 Trading revenue $ — $ — $ 65,152 $ — $ 65,152 $ 65,152 $ — Customer hedging revenue 7,151 — 5,067 872 13,090 13,090 — Retail brokerage revenue — — 9,531 — 9,531 — 9,531 Investment banking revenue 7,925 — 16,498 — 24,423 7,036 17,387 Brokerage and trading revenue 15,076 — 96,248 872 112,196 85,278 26,918 TransFund EFT network revenue 42,349 1,602 (37) — 43,914 — 43,914 Merchant services revenue 4,682 17 — — 4,699 — 4,699 Corporate card revenue 3,606 — 340 180 4,126 — 4,126 Transaction card revenue 50,637 1,619 303 180 52,739 — 52,739 Personal trust revenue — — 51,115 — 51,115 — 51,115 Corporate trust revenue — — 17,906 — 17,906 — 17,906 Institutional trust & retirement plan services revenue — — 32,667 — 32,667 — 32,667 Investment management services and other revenue — — 11,193 — 11,193 — 11,193 Fiduciary and asset management revenue — — 112,881 — 112,881 — 112,881 Commercial account service charge revenue 30,295 1,083 1,149 — 32,527 — 32,527 Overdraft fee revenue 63 10,768 62 — 10,893 — 10,893 Check card revenue — 11,719 — — 11,719 — 11,719 Automated service charge and other deposit fee revenue 528 2,425 165 — 3,118 — 3,118 Deposit service charges and fees 30,886 25,995 1,376 — 58,257 — 58,257 Mortgage production revenue — 5,894 — — 5,894 5,894 — Mortgage servicing revenue — 33,079 — (1,378) 31,701 31,701 — Mortgage banking revenue — 38,973 — (1,378) 37,595 37,595 — Other revenue 7,751 5,872 21,104 (7,804) 26,923 16,312 10,611 Total fees and commissions revenue $ 104,350 $ 72,459 $ 231,912 $ (8,130) $ 400,591 $ 139,185 $ 261,406 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 June 30, 2023 (in thousands): Commercial Consumer Wealth Management Funds Management & Other Consolidated Out of Scope 1 In Scope 2 Trading revenue $ — $ — $ 36,921 $ — $ 36,921 $ 36,921 $ — Customer hedging revenue 12,839 — (159) 962 13,642 13,642 — Retail brokerage revenue — — 3,321 — 3,321 — 3,321 Insurance brokerage revenue — — 2,857 — 2,857 — 2,857 Investment banking revenue 3,514 — 4,751 — 8,265 3,452 4,813 Brokerage and trading revenue 16,353 — 47,691 962 65,006 54,015 10,991 TransFund EFT network revenue 20,483 907 (17) 2 21,375 — 21,375 Merchant services revenue 2,494 10 — — 2,504 — 2,504 Corporate card revenue 1,834 — 184 106 2,124 — 2,124 Transaction card revenue 24,811 917 167 108 26,003 — 26,003 Personal trust revenue — — 25,315 — 25,315 — 25,315 Corporate trust revenue — — 7,201 — 7,201 — 7,201 Institutional trust & retirement plan services revenue — — 13,707 — 13,707 — 13,707 Investment management services and other revenue — — 6,775 (1) 6,774 — 6,774 Fiduciary and asset management revenue — — 52,998 (1) 52,997 — 52,997 Commercial account service charge revenue 13,364 530 488 (2) 14,380 — 14,380 Overdraft fee revenue 32 5,066 42 1 5,141 — 5,141 Check card revenue — 5,976 — (1) 5,975 — 5,975 Automated service charge and other deposit fee revenue 267 1,233 103 1 1,604 — 1,604 Deposit service charges and fees 13,663 12,805 633 (1) 27,100 — 27,100 Mortgage production revenue — (284) — — (284) (284) — Mortgage servicing revenue — 15,993 — (568) 15,425 15,425 — Mortgage banking revenue — 15,709 — (568) 15,141 15,141 — Other revenue 4,877 2,930 21,561 (15,118) 14,250 8,166 6,084 Total fees and commissions revenue $ 59,704 $ 32,361 $ 123,050 $ (14,618) $ 200,497 $ 77,322 $ 123,175 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 six months ended June 30, 2023 (in thousands): Commercial Consumer Wealth Management Funds Management & Other Consolidated Out of Scope 1 In Scope 2 Trading revenue $ — $ — $ 64,519 $ — $ 64,519 $ 64,519 $ — Customer hedging revenue 19,326 — (59) 2,729 21,996 21,996 — Retail brokerage revenue — — 7,165 — 7,165 — 7,165 Insurance brokerage revenue — — 6,163 — 6,163 — 6,163 Investment banking revenue 7,212 — 10,347 — 17,559 7,050 10,509 Brokerage and trading revenue 26,538 — 88,135 2,729 117,402 93,565 23,837 TransFund EFT network revenue 40,982 1,815 (34) 4 42,767 — 42,767 Merchant services revenue 4,644 18 — — 4,662 — 4,662 Corporate card revenue 3,619 — 361 215 4,195 — 4,195 Transaction card revenue 49,245 1,833 327 219 51,624 — 51,624 Personal trust revenue — — 48,842 — 48,842 — 48,842 Corporate trust revenue — — 14,861 — 14,861 — 14,861 Institutional trust & retirement plan services revenue — — 26,960 — 26,960 — 26,960 Investment management services and other revenue — — 13,013 (22) 12,991 — 12,991 Fiduciary and asset management revenue — — 103,676 (22) 103,654 — 103,654 Commercial account service charge revenue 26,235 1,029 965 (2) 28,227 — 28,227 Overdraft fee revenue 57 9,894 62 1 10,014 — 10,014 Check card revenue — 11,614 — — 11,614 — 11,614 Automated service charge and other deposit fee revenue 504 2,546 162 1 3,213 — 3,213 Deposit service charges and fees 26,796 25,083 1,189 — 53,068 — 53,068 Mortgage production revenue — (917) — — (917) (917) — Mortgage servicing revenue — 31,551 — (1,126) 30,425 30,425 — Mortgage banking revenue — 30,634 — (1,126) 29,508 29,508 — Other revenue 12,960 5,392 38,634 (25,766) 31,220 16,727 14,493 Total fees and commissions revenue $ 115,539 $ 62,942 $ 231,961 $ (23,966) $ 386,476 $ 139,800 $ 246,676 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.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2024
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 June 30, 2024 (in thousands): Total Quoted Prices in Active Markets for Identical Instruments (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs Assets: Trading securities: U.S. government securities $ 71,169 $ 69,955 $ 1,214 $ — Residential agency mortgage-backed securities 5,023,892 — 5,023,892 — Municipal securities 56,780 — 56,780 — Other trading securities 60,950 — 60,950 — Total trading securities 5,212,791 69,955 5,142,836 — Available for sale securities: U.S. Treasury 923 923 — — Municipal securities 278,043 — 278,043 — Residential agency mortgage-backed securities 8,108,567 — 8,108,567 — Residential non-agency mortgage-backed securities 828,049 — 828,049 — Commercial agency mortgage-backed securities 3,577,729 — 3,577,729 — Other debt securities 473 — — 473 Total available for sale securities 12,793,784 923 12,792,388 473 Fair value option securities — Residential agency mortgage-backed securities 19,050 — 19,050 — Residential mortgage loans held for sale 1 107,465 — 100,364 7,101 Mortgage servicing rights 2 333,246 — — 333,246 Derivative contracts, net of cash collateral 3 225,076 3,699 221,377 — Liabilities: Derivative contracts, net of cash collateral 3 287,509 658 286,851 — 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 79.41% of the unpaid principal balance. 2 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. 3 See 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, 2023 (in thousands): Total Quoted Prices in Active Markets for Identical Instruments (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs Assets: Trading securities: U.S. government securities $ 10,959 $ 9,017 $ 1,942 $ — Residential agency mortgage-backed securities 5,105,137 — 5,105,137 — Municipal securities 37,413 — 37,413 — Other trading securities 39,996 — 39,996 — Total trading securities 5,193,505 9,017 5,184,488 — Available for sale securities: U.S. Treasury 925 925 — — Municipal securities 502,833 — 502,833 — Residential agency mortgage-backed securities 6,834,720 — 6,834,720 — Residential non-agency mortgage-backed securities 799,877 — 799,877 — Commercial agency mortgage-backed securities 4,147,853 — 4,147,853 — Other debt securities 473 — — 473 Total available for sale securities 12,286,681 925 12,285,283 473 Fair value option securities — Residential agency mortgage-backed securities 20,671 — 20,671 — Residential mortgage loans held for sale 1 56,935 — 49,749 7,186 Mortgage servicing rights 2 293,884 — — 293,884 Derivative contracts, net of cash collateral 3 410,304 — 410,304 — Liabilities: Derivative contracts, net of cash collateral 3 587,473 2,607 584,866 — 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 77.74% of the unpaid principal balance. 2 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. 3 See 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 June 30, 2024 for which the fair value was adjusted during the six months ended June 30, 2024 (in thousands): Fair Value Adjustments for the Carrying Value at June 30, 2024 Three Months Ended Six Months Ended Quoted Prices Significant Significant 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 $ — $ 65 $ 10,065 $ 6,349 $ — $ 10,033 $ — 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 June 30, 2023 for which the fair value was adjusted during the six months ended June 30, 2023 (in thousands): Fair Value Adjustments for the Carrying Value at June 30, 2023 Three Months Ended Six Months Ended Quoted Prices Significant Significant 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 $ — $ — $ 12,048 $ 6,797 $ — $ 8,787 $ — Real estate and other repossessed assets — 547 — — — — (101)
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 June 30, 2024 follows (dollars in thousands): Fair Value Valuation Technique(s) Unobservable Input Range Nonaccruing loans $ 10,065 Discounted cash flows Management knowledge of industry and non-real estate collateral 4% - 90% (45%) 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 June 30, 2023 follows (dollars in thousands): Fair Value Valuation Technique(s) Unobservable Input Range Nonaccruing loans $ 12,048 Discounted cash flows Management knowledge of industry and non-real estate collateral 44% - 62% (58%) 1 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 June 30, 2024 (in thousands): Carrying Estimated Quoted Prices in Active Markets for Identical Instruments (Level 1) Significant Other Observable Inputs Significant Unobservable Inputs Cash and due from banks $ 897,811 $ 897,811 $ 897,811 $ — $ — Interest-bearing cash and cash equivalents 178,352 178,352 178,352 — — Trading securities: U.S. government securities 71,169 71,169 69,955 1,214 — Residential agency mortgage-backed securities 5,023,892 5,023,892 — 5,023,892 — Municipal securities 56,780 56,780 — 56,780 — Other trading securities 60,950 60,950 — 60,950 — Total trading securities 5,212,791 5,212,791 69,955 5,142,836 — Investment securities: Municipal securities 107,188 109,700 — 11,989 97,711 Residential agency mortgage-backed securities 1,990,626 1,786,096 — 1,786,096 — Commercial agency mortgage-backed securities 16,066 15,030 — 15,030 — Other debt securities 15,288 13,706 — 13,706 — Total investment securities 2,129,168 1,924,532 — 1,826,821 97,711 Allowance for credit losses (287) — — — — Investment securities, net of allowance 2,128,881 1,924,532 — 1,826,821 97,711 Available for sale securities: U.S. Treasury 923 923 923 — — Municipal securities 278,043 278,043 — 278,043 — Residential agency mortgage-backed securities 8,108,567 8,108,567 — 8,108,567 — Residential non-agency mortgage-backed securities 828,049 828,049 — 828,049 — Commercial agency mortgage-backed securities 3,577,729 3,577,729 — 3,577,729 — Other debt securities 473 473 — — 473 Total available for sale securities 12,793,784 12,793,784 923 12,792,388 473 Fair value option securities — Residential agency mortgage-backed securities 19,050 19,050 — 19,050 — Residential mortgage loans held for sale 107,465 107,465 — 100,364 7,101 Loans: Commercial 15,623,409 15,594,663 — — 15,594,663 Commercial real estate 5,083,575 4,988,792 — — 4,988,792 Loans to individuals 3,846,597 3,712,068 — — 3,712,068 Total loans 24,553,581 24,295,523 — — 24,295,523 Allowance for loan losses (287,826) — — — — Loans, net of allowance 24,265,755 24,295,523 — — 24,295,523 Mortgage servicing rights 333,246 333,246 — — 333,246 Derivative instruments with positive fair value, net of cash collateral 225,076 225,076 3,699 221,377 — Deposits with no stated maturity 32,777,709 32,777,709 — 32,777,709 — Time deposits 3,463,935 3,439,777 — — 3,439,777 Other borrowed funds 7,342,296 7,342,295 — — 7,342,295 Subordinated debentures 131,156 119,428 — 119,428 — Derivative instruments with negative fair value, net of cash collateral 287,509 287,509 658 286,851 — 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, 2023 (in thousands): Carrying Estimated Quoted Prices in Active Markets for Identical Instruments (Level 1) Significant Other Observable Inputs Significant Unobservable Inputs Cash and due from banks $ 947,613 $ 947,613 $ 947,613 $ — $ — Interest-bearing cash and cash equivalents 400,652 400,652 400,652 — — Trading securities: U.S. government securities 10,959 10,959 9,017 1,942 — Residential agency mortgage-backed securities 5,105,137 5,105,137 — 5,105,137 — Municipal securities 37,413 37,413 — 37,413 — Other trading securities 39,996 39,996 — 39,996 — Total trading securities 5,193,505 5,193,505 9,017 5,184,488 — Investment securities: Municipal securities 120,705 125,525 — 12,305 113,220 Residential agency mortgage-backed securities 2,092,083 1,917,810 — 1,917,810 — Commercial agency mortgage-backed securities 15,914 15,067 — 15,067 — Other debt securities 15,787 14,184 — 14,184 — Total investment securities 2,244,489 2,072,586 — 1,959,366 113,220 Allowance for credit losses (336) — — — — Investment securities, net of allowance 2,244,153 2,072,586 — 1,959,366 113,220 Available for sale securities: U.S. Treasury 925 925 925 — — Municipal securities 502,833 502,833 — 502,833 — Residential agency mortgage-backed securities 6,834,720 6,834,720 — 6,834,720 — Residential non-agency mortgage-backed securities 799,877 799,877 — 799,877 — Commercial agency mortgage-backed securities 4,147,853 4,147,853 — 4,147,853 — Other debt securities 473 473 — — 473 Total available for sale securities 12,286,681 12,286,681 925 12,285,283 473 Fair value option securities — Residential agency mortgage-backed securities 20,671 20,671 — 20,671 — Residential mortgage loans held for sale 56,935 56,935 — 49,749 7,186 Loans: Commercial 14,803,769 14,862,873 — — 14,862,873 Commercial real estate 5,337,647 5,270,657 — — 5,270,657 Loans to individuals 3,763,552 3,634,855 — — 3,634,855 Total loans 23,904,968 23,768,385 — — 23,768,385 Allowance for loan losses (277,123) — — — — Loans, net of allowance 23,627,845 23,768,385 — — 23,768,385 Mortgage servicing rights 293,884 293,884 — — 293,884 Derivative instruments with positive fair value, net of cash collateral 410,304 410,304 — 410,304 — Deposits with no stated maturity 31,007,679 31,007,679 — — 31,007,679 Time deposits 3,012,022 2,993,685 — — 2,993,685 Other borrowed funds 8,824,300 8,824,299 — — 8,824,299 Subordinated debentures 131,150 115,798 — 115,798 — Derivative instruments with negative fair value, net of cash collateral 587,473 587,473 2,607 584,866 —

Significant Accounting Polici_3

Significant Accounting Policies Loans and Allowance for Credit Losses (Details)	6 Months Ended
	Jun. 30, 2024
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

Trading Securities (Details)

Trading Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Schedule of Trading Securities [Line Items]
Trading Securities, Fair Value	$ 5,212,791	$ 5,193,505
Trading Securities, Net Unrealized Gain (Loss)	6,010	98,635
U.S. government securities [Member]
Schedule of Trading Securities [Line Items]
Trading Securities, Fair Value	71,169	10,959
Trading Securities, Net Unrealized Gain (Loss)	33	28
Residential agency mortgage-backed securities [Member]
Schedule of Trading Securities [Line Items]
Trading Securities, Fair Value	5,023,892	5,105,137
Trading Securities, Net Unrealized Gain (Loss)	5,742	98,124
Municipal securities [Member]
Schedule of Trading Securities [Line Items]
Trading Securities, Fair Value	56,780	37,413
Trading Securities, Net Unrealized Gain (Loss)	152	323
Other trading securities [Member]
Schedule of Trading Securities [Line Items]
Trading Securities, Fair Value	60,950	39,996
Trading Securities, Net Unrealized Gain (Loss)	$ 83	$ 160

Investment (Held-to-Maturity) S

Investment (Held-to-Maturity) Securities (Details) $ in Thousands		3 Months Ended		6 Months Ended		12 Months Ended
		Jun. 30, 2024 USD ($)		Jun. 30, 2024 USD ($)		Dec. 31, 2023 USD ($)
Schedule of Investment (Held-to-Maturity) Securities [Line Items]
Investment Securities, Gross Amortized Cost		$ 2,269,560		$ 2,269,560		$ 2,409,090
Investment Securities, Gross Carrying Value		2,129,168	[1]	2,129,168	[1]	2,244,489	[2]
Investment securities, Allowance for Credit Loss		(287)	[1]	(287)	[1]	(336)	[2]
Investment Securities, Amortized Cost, After Allowance for Credit Loss		2,269,273		2,269,273		2,408,754
Investment Securities, Carrying Value, after Allowance for Credit Loss		2,128,881	[1]	2,128,881	[1]	2,244,153	[2]
Investment Securities, Fair Value		1,924,532		1,924,532		2,072,586
Investment Securities, Gross Unrealized Gain		3,067		3,067		5,139
Investment Securities, Gross Unrealized Loss		$ (207,703)		(207,703)		(177,042)
Debt Securities, Net Unrealized Loss Remaining in AOCI included in Carrying Value for AFS Securities Transferred to Investment Securities				$ (140,000)		$ (165,000)
Investment Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]
Investment Securities, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		146		146		134
Investment Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Investment Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 16,795		$ 16,795		$ 1,931
Investment Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		1,816,520		1,816,520		1,947,071
Investment Securities, Continuous Unrealized Loss Position, Fair Value		1,833,315		1,833,315		1,949,002
Investment Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]
Investment Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		150		150		5
Investment Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		207,553		207,553		177,037
Investment Securities, Continuous Unrealized Loss Position, Accumulated Loss		207,703		207,703		177,042
Fixed Maturity Securities [Member]
Investment Securities, Debt Maturities, Net Carrying Value [Abstract]
Investment Securities, Debt Maturities, Less than One Year, Net Carrying Value		18,247		18,247
Investment Securities, Debt Maturities, One to Five Years, Net Carrying Value		101,521		101,521
Investment Securities, Debt Maturities, Six to Ten Years, Net Carrying Value		18,761		18,761
Investment Securities, Debt Maturities, Over Ten Years, Net Carrying Value		13		13
Investment Securities, Debt Maturities, Single Maturity Date, Net Carrying Value		138,542		138,542
Investment Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]
Investment Securities, Debt Maturities, Less Than One Year, Fair Value		18,397		18,397
Investment Securities, Debt Maturities, One to Five Years, Fair Value		102,988		102,988
Investment Securities, Debt Maturities, Six to Ten Years, Fair Value		17,038		17,038
Investment Securities, Debt Maturities, Over Ten Years, Fair Value		13		13
Investment Securities, Debt Maturities, Single Maturity Date, Fair Value		$ 138,436		$ 138,436
Investment Securities, Debt Maturities, Weighted Average Maturity	[3]	3.10		3.10
Municipal securities [Member]
Schedule of Investment (Held-to-Maturity) Securities [Line Items]
Investment Securities, Gross Amortized Cost		$ 107,188		$ 107,188		120,705
Investment Securities, Gross Carrying Value		107,188	[1]	107,188	[1]	120,705	[2]
Investment Securities, Fair Value		109,700		109,700		125,525
Investment Securities, Gross Unrealized Gain		2,976		2,976		5,014
Investment Securities, Gross Unrealized Loss		$ (464)		$ (464)		$ (194)
Investment Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]
Investment Securities, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		25		25		13
Investment Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Investment Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 16,795		$ 16,795		$ 1,931
Investment Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		7,679		7,679		6,600
Investment Securities, Continuous Unrealized Loss Position, Fair Value		24,474		24,474		8,531
Investment Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]
Investment Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		150		150		5
Investment Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		314		314		189
Investment Securities, Continuous Unrealized Loss Position, Accumulated Loss		464		464		194
Residential agency mortgage-backed securities [Member]
Schedule of Investment (Held-to-Maturity) Securities [Line Items]
Investment Securities, Gross Amortized Cost		2,129,826		2,129,826		2,255,340
Investment Securities, Gross Carrying Value		1,990,626	[1]	1,990,626	[1]	2,092,083	[2]
Investment Securities, Fair Value		1,786,096		1,786,096		1,917,810
Investment Securities, Gross Unrealized Gain		91		91		125
Investment Securities, Gross Unrealized Loss		(204,621)		(204,621)		$ (174,398)
Investment Securities, Debt Maturities, Net Carrying Value [Abstract]
Investment Securities, Debt Maturities, without Single Maturity Date, Net Carrying Value	[4]	1,990,626		1,990,626
Investment Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]
Investment Securities, Debt Maturities, without Single Maturity Date, Fair Value		$ 1,786,096		$ 1,786,096
Investment Securities, Debt Maturities, Average Expected Life of Mortgage-backed Securities		4 years 10 months 24 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		$ 0
Investment Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		1,785,118		1,785,118		1,916,732
Investment Securities, Continuous Unrealized Loss Position, Fair Value		1,785,118		1,785,118		1,916,732
Investment Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]
Investment Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		0		0		0
Investment Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		204,621		204,621		174,398
Investment Securities, Continuous Unrealized Loss Position, Accumulated Loss		204,621		204,621		174,398
Commercial agency mortgage-backed securities [Member]
Schedule of Investment (Held-to-Maturity) Securities [Line Items]
Investment Securities, Gross Amortized Cost		17,258		17,258		17,258
Investment Securities, Gross Carrying Value		16,066	[1]	16,066	[1]	15,914	[2]
Investment Securities, Fair Value		15,030		15,030		15,067
Investment Securities, Gross Unrealized Gain		0		0		0
Investment Securities, Gross Unrealized Loss		$ (1,036)		$ (1,036)		$ (847)
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		$ 0
Investment Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		15,030		15,030		15,067
Investment Securities, Continuous Unrealized Loss Position, Fair Value		15,030		15,030		15,067
Investment Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]
Investment Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		0		0		0
Investment Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		1,036		1,036		847
Investment Securities, Continuous Unrealized Loss Position, Accumulated Loss		1,036		1,036		847
Other debt securities [Member]
Schedule of Investment (Held-to-Maturity) Securities [Line Items]
Investment Securities, Gross Amortized Cost		15,288		15,288		15,787
Investment Securities, Gross Carrying Value		15,288	[1]	15,288	[1]	15,787	[2]
Investment Securities, Fair Value		13,706		13,706		14,184
Investment Securities, Gross Unrealized Gain		0		0		0
Investment Securities, Gross Unrealized Loss		$ (1,582)		$ (1,582)		$ (1,603)
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		$ 0
Investment Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		8,693		8,693		8,672
Investment Securities, Continuous Unrealized Loss Position, Fair Value		8,693		8,693		8,672
Investment Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]
Investment Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		0		0		0
Investment Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		1,582		1,582		1,603
Investment Securities, Continuous Unrealized Loss Position, Accumulated Loss		$ 1,582		$ 1,582		$ 1,603
[1] Carrying value includes $140 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. Carrying value includes $165 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. Expected maturities may differ from contractual maturities, because borrowers may have the right to call or prepay obligations with or without penalty. The average expected lives of residential mortgage-backed securities were 4.9 years based upon current prepayment assumptions.

Available for Sale Securities (

Available for Sale Securities (Details) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost		$ 13,443,020		$ 13,443,020		$ 12,903,305
Available-for-sale Securities, Fair Value		12,793,784		12,793,784		12,286,681
Available-for-sale Securities, Gross Unrealized Gain		23,578		23,578		52,821
Available-for-sale Securities, Gross Unrealized Loss		(672,814)		(672,814)		(669,445)
Debt Securities, Available-for-sale, Realized Gain (Loss) [Abstract]
Available-for-sale Securities, Proceeds		1,836	$ 135,489	737,830	$ 135,489
Available-for-sale Securities, Gross realized gains		222	703	455	703
Available-for-sale Securities, Gross realized losses		(188)	(3,713)	(45,592)	(3,713)
Available-for-sale Securities, Related federal and state income tax expense (benefit)		8	$ (708)	(10,616)	$ (708)
Asset Pledged as Collateral with Right
Debt Securities, Available-for-sale, Realized Gain (Loss) [Abstract]
Pledged Securities		12,600,000		12,600,000		13,900,000
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		415,221		415,221
Available-for-sale Securities, Debt Maturities, One to Five Years, Amortized Cost Basis		2,459,948		2,459,948
Available-for-sale Securities, Debt Maturities, Six To Ten Years, Amortized Cost Basis		852,408		852,408
Available-for-sale Securities, Debt Maturities, Over Ten Years, Amortized Cost Basis		443,805		443,805
Available-for-sale Securities, Debt Maturities, Allocated and Single Maturity Date, Amortized Cost		4,171,382		4,171,382
Debt Securities, Available-for-sale, Maturity, Fair Value, Rolling Maturity [Abstract]
Available-for-sale Securities, Debt Maturities, Less than One Year, Fair Value		411,548		411,548
Available-for-sale Securities, Debt Maturities, One to Five Years, Fair Value		2,242,456		2,242,456
Available-for-sale Securities, Debt Maturities, Six to Ten Years, Fair Value		780,072		780,072
Available-for-sale Securities, Debt Maturities, Over Ten Years, Fair Value		423,092		423,092
Available-for-sale Securities, Debt Maturities, Allocated and Single Maturity Date, Fair Value		$ 3,857,168		$ 3,857,168
Available-for-sale Securities, Debt Maturities, Weighted Average Maturity	[1]	5.08		5.08
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		923		923		925
Available-for-sale Securities, Gross Unrealized Gain		0		0		0
Available-for-sale Securities, Gross Unrealized Loss		(77)		(77)		(75)
Municipal securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost		301,294		301,294		544,707
Available-for-sale Securities, Fair Value		278,043		278,043		502,833
Available-for-sale Securities, Gross Unrealized Gain		0		0		1
Available-for-sale Securities, Gross Unrealized Loss		(23,251)		(23,251)		(41,875)
Commercial agency mortgage-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost		3,868,588		3,868,588		4,456,918
Available-for-sale Securities, Fair Value		3,577,729		3,577,729		4,147,853
Available-for-sale Securities, Gross Unrealized Gain		816		816		2,972
Available-for-sale Securities, Gross Unrealized Loss		(291,675)		(291,675)		(312,037)
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)
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]	9,271,637		9,271,637
Debt Securities, Available-for-sale, Maturity, Fair Value, Rolling Maturity [Abstract]
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value		$ 8,936,615		8,936,615
Available-for-sale Securities, Debt Maturities, Average Expected Life of Mortgage-backed Securities		4 years 3 months 18 days
Residential agency mortgage-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost		$ 8,401,476		8,401,476		7,066,645
Available-for-sale Securities, Fair Value		8,108,567		8,108,567		6,834,720
Available-for-sale Securities, Gross Unrealized Gain		12,321		12,321		36,983
Available-for-sale Securities, Gross Unrealized Loss		(305,230)		(305,230)		(268,908)
Residential non-agency mortgage-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost		870,162		870,162		833,535
Available-for-sale Securities, Fair Value		828,049		828,049		799,877
Available-for-sale Securities, Gross Unrealized Gain		10,441		10,441		12,865
Available-for-sale Securities, Gross Unrealized Loss		$ (52,554)		$ (52,554)		$ (46,523)
[1] Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without penalty. The average expected lives of residential mortgage-backed securities were 4.3 years based upon current prepayment assumptions.

Securities Debt Securities, Ava

Securities Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value (Details) $ in Thousands	Jun. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	1,206	1,123
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 3,394,198	$ 1,205,822
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	7,577,536	8,087,455
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	10,971,734	9,293,277
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	27,398	7,969
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	645,416	661,476
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 672,814	$ 669,445
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	923	925
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	923	925
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	77	75
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 77	$ 75
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	130	190
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 11,009	$ 6,799
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	257,764	494,955
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	268,773	501,754
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	58	410
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	23,193	41,465
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 23,251	$ 41,875
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	793	630
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 3,033,904	$ 690,118
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	3,650,900	3,717,975
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	6,684,804	4,408,093
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	24,223	3,689
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	281,007	265,219
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 305,230	$ 268,908
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	41	32
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 166,281	$ 116,077
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	515,977	451,370
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	682,258	567,447
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	1,108	1,244
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	51,446	45,279
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 52,554	$ 46,523
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	240	269
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 183,004	$ 392,828
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	3,151,499	3,421,757
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	3,334,503	3,814,585
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	2,009	2,626
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	289,666	309,411
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 291,675	$ 312,037
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

Securities Fair Value Option Se

Securities Fair Value Option Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Fair Value Option Securities [Line Items]
Fair value option securities, Fair Value	$ 19,050	$ 20,671
Residential agency mortgage-backed securities [Member]
Fair Value Option Securities [Line Items]
Fair value option securities, Fair Value	19,050	20,671
Fair value option securities, Net Unrealized Gain (Loss)	$ (1,805)	$ (1,406)

Derivatives, Fair Value of Deri

Derivatives, Fair Value of Derivatives Contracts (Details) - USD ($) $ in Thousands	Jun. 30, 2024		Dec. 31, 2023
Derivative Assets, Fair Value, Net [Abstract]
Derviative contracts, net of cash collateral, Assets, Fair value	$ 225,076		$ 410,304
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Fair Value, Net of Cash Collateral	287,509		587,473
Not Designated as Hedging Instrument [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional	36,170,030	[1]	27,348,813	[2]
Derivative Liabilities, Notional	35,270,873	[1]	31,712,601	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value	866,846		1,125,034
Derivative Assets, Netting Adjustments	(497,665)		(443,069)
Derivative Assets, Net Fair Value Before Cash Collateral	369,181		681,965
Derivative Assets, Cash Collateral	(144,105)		(271,661)
Derviative contracts, net of cash collateral, Assets, Fair value	225,076		410,304
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value	849,760		1,218,900
Derivative Liabilities, Netting Adjustments	(497,665)		(443,069)
Derivative Liabilities, Net Fair Value Before Cash Collateral	352,095		775,831
Derivative Liabilities, Cash Collateral	(64,586)		(188,358)
Derivative Liabilities, Fair Value, Net of Cash Collateral	287,509		587,473
Not Designated as Hedging Instrument [Member] | Total customer risk management programs
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional	10,474,223	[1]	10,658,981	[2]
Derivative Liabilities, Notional	10,853,848	[1]	11,066,201	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value	776,586		998,792
Derivative Assets, Netting Adjustments	(437,927)		(405,958)
Derivative Assets, Net Fair Value Before Cash Collateral	338,659		592,834
Derivative Assets, Cash Collateral	(142,585)		(264,665)
Derviative contracts, net of cash collateral, Assets, Fair value	196,074		328,169
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value	765,071		992,988
Derivative Liabilities, Netting Adjustments	(437,927)		(405,958)
Derivative Liabilities, Net Fair Value Before Cash Collateral	327,144		587,030
Derivative Liabilities, Cash Collateral	(54,041)		(6,441)
Derivative Liabilities, Fair Value, Net of Cash Collateral	273,103		580,589
Not Designated as Hedging Instrument [Member] | Interest rate contracts [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional	2,964,667	[1]	2,754,476	[2]
Derivative Liabilities, Notional	2,964,667	[1]	2,754,476	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value	109,692		108,450
Derivative Assets, Netting Adjustments	(2,691)		(6,810)
Derivative Assets, Net Fair Value Before Cash Collateral	107,001		101,640
Derivative Assets, Cash Collateral	(103,743)		(94,608)
Derviative contracts, net of cash collateral, Assets, Fair value	3,258		7,032
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value	109,685		108,402
Derivative Liabilities, Netting Adjustments	(2,691)		(6,810)
Derivative Liabilities, Net Fair Value Before Cash Collateral	106,994		101,592
Derivative Liabilities, Cash Collateral	0		0
Derivative Liabilities, Fair Value, Net of Cash Collateral	106,994		101,592
Not Designated as Hedging Instrument [Member] | Energy contracts [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional	7,472,357	[1]	7,846,190	[2]
Derivative Liabilities, Notional	7,851,998	[1]	8,254,004	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value	631,285		836,425
Derivative Assets, Netting Adjustments	(435,236)		(399,148)
Derivative Assets, Net Fair Value Before Cash Collateral	196,049		437,277
Derivative Assets, Cash Collateral	(38,770)		(169,141)
Derviative contracts, net of cash collateral, Assets, Fair value	157,279		268,136
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value	619,809		831,467
Derivative Liabilities, Netting Adjustments	(435,236)		(399,148)
Derivative Liabilities, Net Fair Value Before Cash Collateral	184,573		432,319
Derivative Liabilities, Cash Collateral	(54,007)		(6,441)
Derivative Liabilities, Fair Value, Net of Cash Collateral	130,566		425,878
Not Designated as Hedging Instrument [Member] | Foreign exchange contracts [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional	35,606	[1]	54,999	[2]
Derivative Liabilities, Notional	35,590	[1]	54,405	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value	35,451		53,863
Derivative Assets, Netting Adjustments	0		0
Derivative Assets, Net Fair Value Before Cash Collateral	35,451		53,863
Derivative Assets, Cash Collateral	(22)		(872)
Derviative contracts, net of cash collateral, Assets, Fair value	35,429		52,991
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value	35,419		53,065
Derivative Liabilities, Netting Adjustments	0		0
Derivative Liabilities, Net Fair Value Before Cash Collateral	35,419		53,065
Derivative Liabilities, Cash Collateral	(34)		0
Derivative Liabilities, Fair Value, Net of Cash Collateral	35,385		53,065
Not Designated as Hedging Instrument [Member] | Equity option contracts [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional	1,593	[1]	3,316	[2]
Derivative Liabilities, Notional	1,593	[1]	3,316	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value	158		54
Derivative Assets, Netting Adjustments	0		0
Derivative Assets, Net Fair Value Before Cash Collateral	158		54
Derivative Assets, Cash Collateral	(50)		(44)
Derviative contracts, net of cash collateral, Assets, Fair value	108		10
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value	158		54
Derivative Liabilities, Netting Adjustments	0		0
Derivative Liabilities, Net Fair Value Before Cash Collateral	158		54
Derivative Liabilities, Cash Collateral	0		0
Derivative Liabilities, Fair Value, Net of Cash Collateral	158		54
Not Designated as Hedging Instrument [Member] | Trading [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional	25,238,831	[1]	16,264,818	[2]
Derivative Liabilities, Notional	24,337,408	[1]	20,644,156	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value	82,976		118,545
Derivative Assets, Netting Adjustments	(59,454)		(37,111)
Derivative Assets, Net Fair Value Before Cash Collateral	23,522		81,434
Derivative Assets, Cash Collateral	(1,520)		(6,996)
Derviative contracts, net of cash collateral, Assets, Fair value	22,002		74,438
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value	83,121		224,648
Derivative Liabilities, Netting Adjustments	(59,454)		(37,111)
Derivative Liabilities, Net Fair Value Before Cash Collateral	23,667		187,537
Derivative Liabilities, Cash Collateral	(10,545)		(181,917)
Derivative Liabilities, Fair Value, Net of Cash Collateral	13,122		5,620
Not Designated as Hedging Instrument [Member] | Internal risk management programs [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional	456,976	[1]	425,014	[2]
Derivative Liabilities, Notional	79,617	[1]	2,244	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value	7,284		7,697
Derivative Assets, Netting Adjustments	(284)		0
Derivative Assets, Net Fair Value Before Cash Collateral	7,000		7,697
Derivative Assets, Cash Collateral	0		0
Derviative contracts, net of cash collateral, Assets, Fair value	7,000		7,697
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value	1,568		1,264
Derivative Liabilities, Netting Adjustments	(284)		0
Derivative Liabilities, Net Fair Value Before Cash Collateral	1,284		1,264
Derivative Liabilities, Cash Collateral	0		0
Derivative Liabilities, Fair Value, Net of Cash Collateral	$ 1,284		$ 1,264
[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.

Derivatives, Derivatives Instru

Derivatives, Derivatives Instruments Gain (Loss) in Income Statement (Details) - Not Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2024		Jun. 30, 2023		Jun. 30, 2024		Jun. 30, 2023
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract]
Brokergage and Trading Revenue	$ 39,341		$ 77,814		$ 129,372		$ 23,075
Gain (Loss) on Derivatives, Net	(1,091)		(8,159)		(9,724)		(9,503)
Total customer risk management programs
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract]
Brokergage and Trading Revenue	6,765		13,642		13,090		21,996
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	547		2,339		3,007		4,109
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	6,162		11,250		9,977		17,803
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	56		53		106		84
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	32,576	[1]	64,172	[1]	116,282	[2]	1,079	[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	$ (1,091)		$ (8,159)		$ (9,724)		$ (9,503)
[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. 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.

Loans and Allowance for Credit

Loans and Allowance for Credit Losses, Loans by Portfolio Type (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Loan receivables disclosure [Abstract]
Loans, fixed rate of interest	$ 6,788,786	$ 6,633,234
Loans, variable rate of interest	17,674,112	17,126,265
Loans, non-accrual	90,683	145,469
Total	24,553,581	23,904,968
Credit Commitments [Abstract]
Outstanding commitments to extend credit	14,100,000
Outstanding standby letters of credit	737,000
Commercial [Member]
Loan receivables disclosure [Abstract]
Loans, fixed rate of interest	3,604,024	3,558,563
Loans, variable rate of interest	11,960,951	11,135,075
Loans, non-accrual	58,434	110,131
Total	15,623,409	14,803,769
Commercial real estate [Member]
Loan receivables disclosure [Abstract]
Loans, fixed rate of interest	756,055	791,757
Loans, variable rate of interest	4,314,637	4,538,570
Loans, non-accrual	12,883	7,320
Total	5,083,575	5,337,647
Loans to individuals [Member]
Loan receivables disclosure [Abstract]
Loans, fixed rate of interest	2,428,707	2,282,914
Loans, variable rate of interest	1,398,524	1,452,620
Loans, non-accrual	19,366	28,018
Total	$ 3,846,597	$ 3,763,552

Loans and Allowances for Cred_3

Loans and Allowances for Credit Losses, Activity in Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 281,623	$ 249,460	$ 277,123	$ 235,704	$ 235,704
Provision for loan losses	13,148	19,957	23,108	34,482
Loans charged off	(7,940)	(8,049)	(15,000)	(11,716)
Recoveries of loans previously charged off	995	1,346	2,595	4,244
Ending balance	287,826	262,714	287,826	262,714	277,123
Provision Details [Abstract]
Provision for credit losses	8,000	17,000	16,000	33,000
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	47,319	62,943	48,977	60,919	60,919
Provision for off-balance sheet credit risk	(4,983)	(3,003)	(6,641)	(979)
Ending balance	42,336	59,940	42,336	59,940	48,977
Recorded investment [Abstract]
Collectively measured for impairment, recorded investment	24,462,898		24,462,898		23,759,499
Individually measured for impairment, recorded investment	90,683		90,683		145,469
Total	24,553,581		24,553,581		23,904,968
Related allowance [Abstract]
Collectively measured for impairment, related allowance	285,612		285,612		274,431
Individually measured for impairment, related allowance	2,214		2,214		2,692
Total	287,826		287,826		277,123
Commercial [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	146,267	139,898	141,232	131,586	131,586
Provision for loan losses	10,441	5,420	18,752	11,750
Loans charged off	(6,391)	(2,797)	(10,631)	(2,809)
Recoveries of loans previously charged off	420	748	1,384	2,742
Ending balance	150,737	143,269	150,737	143,269	141,232
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	17,790	20,608	19,762	18,246	18,246
Provision for off-balance sheet credit risk	(474)	(314)	(2,446)	2,048
Ending balance	17,316	20,294	17,316	20,294	19,762
Recorded investment [Abstract]
Collectively measured for impairment, recorded investment	15,564,975		15,564,975		14,693,638
Individually measured for impairment, recorded investment	58,434		58,434		110,131
Total	15,623,409		15,623,409		14,803,769
Related allowance [Abstract]
Collectively measured for impairment, related allowance	148,523		148,523		138,540
Individually measured for impairment, related allowance	2,214		2,214		2,692
Total	150,737		150,737		141,232
Commercial real estate [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	97,479	66,003	94,718	57,648	57,648
Provision for loan losses	(1,042)	14,300	2,953	24,726
Loans charged off	(205)	(4,000)	(1,455)	(6,208)	(8,446)
Recoveries of loans previously charged off	24	44	40	181
Ending balance	96,256	76,347	96,256	76,347	94,718
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	27,865	40,211	27,439	40,490	40,490
Provision for off-balance sheet credit risk	(4,551)	(2,530)	(4,125)	(2,809)
Ending balance	23,314	37,681	23,314	37,681	27,439
Recorded investment [Abstract]
Collectively measured for impairment, recorded investment	5,070,692		5,070,692		5,330,327
Individually measured for impairment, recorded investment	12,883		12,883		7,320
Total	5,083,575		5,083,575		5,337,647
Related allowance [Abstract]
Collectively measured for impairment, related allowance	96,256		96,256		94,718
Individually measured for impairment, related allowance	0		0		0
Total	96,256		96,256		94,718
Loans to individuals [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	37,877	43,559	41,173	46,470	46,470
Provision for loan losses	3,749	237	1,403	(1,994)
Loans charged off	(1,344)	(1,252)	(2,914)	(2,699)
Recoveries of loans previously charged off	551	554	1,171	1,321
Ending balance	40,833	43,098	40,833	43,098	41,173
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	1,664	2,124	1,776	2,183	2,183
Provision for off-balance sheet credit risk	42	(159)	(70)	(218)
Ending balance	1,706	$ 1,965	1,706	$ 1,965	1,776
Recorded investment [Abstract]
Collectively measured for impairment, recorded investment	3,827,231		3,827,231		3,735,534
Individually measured for impairment, recorded investment	19,366		19,366		28,018
Total	3,846,597		3,846,597		3,763,552
Related allowance [Abstract]
Collectively measured for impairment, related allowance	40,833		40,833		41,173
Individually measured for impairment, related allowance	0		0		0
Total	$ 40,833		$ 40,833		$ 41,173

Loans and Allowances for Cred_4

Loans and Allowances for Credit Losses, Credit Quality Indicators (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended			12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024		Jun. 30, 2023	Dec. 31, 2023
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	$ 1,645,484		$ 1,645,484			$ 3,743,425
Financing Receivable, Originated, Year Two	3,255,884		3,255,884			4,522,989
Financing Receivable, Originated, Year Three	4,579,148		4,579,148			2,982,784
Financing Receivable, Originated, Year Four	2,564,100		2,564,100			1,756,064
Financing Receivable, Originated, Year Five	1,580,174		1,580,174			1,234,871
Financing Receivable, Originated, More Than Five Years	3,784,391		3,784,391			3,094,093
Financing Receivable, Revolving	7,119,548		7,119,548			6,543,149
Financing Receivable, Revolving, Converted to Term Loan	24,852		24,852			27,593
Total	24,553,581		24,553,581			23,904,968
Financing Receivable, Allowance for Credit Loss, Writeoff	7,940	$ 8,049	15,000		$ 11,716
Commercial [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	1,207,596		1,207,596			2,698,113
Financing Receivable, Originated, Year Two	2,244,930		2,244,930			2,026,636
Financing Receivable, Originated, Year Three	1,979,131		1,979,131			1,293,089
Financing Receivable, Originated, Year Four	1,145,245		1,145,245			846,923
Financing Receivable, Originated, Year Five	788,661		788,661			576,627
Financing Receivable, Originated, More Than Five Years	2,156,445		2,156,445			1,839,613
Financing Receivable, Revolving	6,098,312		6,098,312			5,519,976
Financing Receivable, Revolving, Converted to Term Loan	3,089		3,089			2,792
Total	15,623,409		15,623,409			14,803,769
Financing Receivable, Allowance for Credit Loss, Writeoff	6,391	2,797	10,631		2,809
Commercial [Member] | Healthcare [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	275,268		275,268			650,768
Financing Receivable Year One Originated Current Fiscal Year Writeoff			0			0
Financing Receivable, Originated, Year Two	641,656		641,656			897,730
Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff			0			0
Financing Receivable, Originated, Year Three	954,097		954,097			609,244
Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff			0			0
Financing Receivable, Originated, Year Four	585,118		585,118			467,993
Financing Receivable Year Four Originated Three Years Before Current Fiscal Year Writeoff			0			0
Financing Receivable, Originated, Year Five	437,772		437,772			355,026
Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff			0			2,500
Financing Receivable, Originated, More Than Five Years	1,072,841		1,072,841			880,099
Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff			6,840			0
Financing Receivable, Revolving	264,294		264,294			282,358
Financing Receivable Revolving Writeoff			0			0
Financing Receivable, Revolving, Converted to Term Loan	12		12			15
Financing Receivable Revolving Converted to Term Writeoff			0			0
Total	4,231,058		4,231,058			4,143,233
Financing Receivable, Allowance for Credit Loss, Writeoff			6,840			2,500
Commercial [Member] | Services [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	330,400		330,400			900,090
Financing Receivable Year One Originated Current Fiscal Year Writeoff			0			0
Financing Receivable, Originated, Year Two	737,760		737,760			541,573
Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff			0			0
Financing Receivable, Originated, Year Three	525,464		525,464			405,205
Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff			0			3,060
Financing Receivable, Originated, Year Four	352,415		352,415			230,823
Financing Receivable Year Four Originated Three Years Before Current Fiscal Year Writeoff			0			0
Financing Receivable, Originated, Year Five	213,057		213,057			110,618
Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff			10			0
Financing Receivable, Originated, More Than Five Years	708,450		708,450			651,745
Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff			0			0
Financing Receivable, Revolving	708,420		708,420			735,561
Financing Receivable Revolving Writeoff			9			2,642
Financing Receivable, Revolving, Converted to Term Loan	1,178		1,178			608
Financing Receivable Revolving Converted to Term Writeoff			0			0
Total	3,577,144		3,577,144			3,576,223
Financing Receivable, Allowance for Credit Loss, Writeoff			19			5,702
Commercial [Member] | Energy [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	55,874		55,874			190,122
Financing Receivable Year One Originated Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Two	103,305		103,305			100,006
Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Three	78,634		78,634			43,769
Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Four	2,707		2,707			7,876
Financing Receivable Year Four Originated Three Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Five	7,288		7,288			9,562
Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, More Than Five Years	20,220		20,220			11,682
Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Revolving	3,183,457		3,183,457			3,074,084
Financing Receivable Revolving Writeoff			0
Financing Receivable, Revolving, Converted to Term Loan	0		0			0
Financing Receivable Revolving Converted to Term Writeoff			0
Total	3,451,485		3,451,485			3,437,101
Financing Receivable, Allowance for Credit Loss, Writeoff			0
Commercial [Member] | General business [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	546,054		546,054			957,133
Financing Receivable Year One Originated Current Fiscal Year Writeoff			0			0
Financing Receivable, Originated, Year Two	762,209		762,209			487,327
Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff			27			0
Financing Receivable, Originated, Year Three	420,936		420,936			234,871
Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff			1,399			4,598
Financing Receivable, Originated, Year Four	205,005		205,005			140,231
Financing Receivable Year Four Originated Three Years Before Current Fiscal Year Writeoff			0			2
Financing Receivable, Originated, Year Five	130,544		130,544			101,421
Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff			0			0
Financing Receivable, Originated, More Than Five Years	354,934		354,934			296,087
Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff			158			48
Financing Receivable, Revolving	1,942,141		1,942,141			1,427,973
Financing Receivable Revolving Writeoff			2,182			10
Financing Receivable, Revolving, Converted to Term Loan	1,899		1,899			2,169
Financing Receivable Revolving Converted to Term Writeoff			6			38
Total	4,363,722		4,363,722			3,647,212
Financing Receivable, Allowance for Credit Loss, Writeoff			3,772			4,696
Commercial real estate [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	39,377		39,377			399,883
Financing Receivable Year One Originated Current Fiscal Year Writeoff			0			0
Financing Receivable, Originated, Year Two	452,689		452,689			1,942,389
Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff			0			0
Financing Receivable, Originated, Year Three	2,099,889		2,099,889			1,194,762
Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff			0			0
Financing Receivable, Originated, Year Four	951,257		951,257			416,647
Financing Receivable Year Four Originated Three Years Before Current Fiscal Year Writeoff			0			0
Financing Receivable, Originated, Year Five	343,462		343,462			520,725
Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff			0			0
Financing Receivable, Originated, More Than Five Years	1,060,114		1,060,114			727,146
Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff			1,455			8,446
Financing Receivable, Revolving	136,787		136,787			136,095
Financing Receivable Revolving Writeoff			0			0
Financing Receivable, Revolving, Converted to Term Loan	0		0			0
Financing Receivable Revolving Converted to Term Writeoff			0			0
Total	5,083,575		5,083,575			5,337,647
Financing Receivable, Allowance for Credit Loss, Writeoff	205	4,000	1,455		6,208	8,446
Loans to individuals [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	398,511		398,511			645,429
Financing Receivable, Originated, Year Two	558,265		558,265			553,964
Financing Receivable, Originated, Year Three	500,128		500,128			494,933
Financing Receivable, Originated, Year Four	467,598		467,598			492,494
Financing Receivable, Originated, Year Five	448,051		448,051			137,519
Financing Receivable, Originated, More Than Five Years	567,832		567,832			527,334
Financing Receivable, Revolving	884,449		884,449			887,078
Financing Receivable, Revolving, Converted to Term Loan	21,763		21,763			24,801
Total	3,846,597		3,846,597			3,763,552
Financing Receivable, Allowance for Credit Loss, Writeoff	1,344	$ 1,252	2,914		$ 2,699
Loans to individuals [Member] | Residential mortgage [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	249,631		249,631			426,325
Financing Receivable Year One Originated Current Fiscal Year Writeoff			0			0
Financing Receivable, Originated, Year Two	377,259		377,259			322,442
Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff			0			0
Financing Receivable, Originated, Year Three	309,136		309,136			343,295
Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff			0			51
Financing Receivable, Originated, Year Four	331,409		331,409			351,647
Financing Receivable Year Four Originated Three Years Before Current Fiscal Year Writeoff			0			4
Financing Receivable, Originated, Year Five	332,949		332,949			55,200
Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff			0			0
Financing Receivable, Originated, More Than Five Years	275,921		275,921			255,920
Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff			5			17
Financing Receivable, Revolving	383,250		383,250			381,158
Financing Receivable Revolving Writeoff			9			0
Financing Receivable, Revolving, Converted to Term Loan	21,671		21,671			24,653
Financing Receivable Revolving Converted to Term Writeoff			0			1
Total	2,281,226		2,281,226			2,160,640
Financing Receivable, Allowance for Credit Loss, Writeoff			14			73
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			633
Financing Receivable, Originated, Year Two	893		893			1,788
Financing Receivable, Originated, Year Three	3,466		3,466			2,220
Financing Receivable, Originated, Year Four	2,727		2,727			4,577
Financing Receivable, Originated, Year Five	4,262		4,262			6,816
Financing Receivable, Originated, More Than Five Years	120,477		120,477			133,773
Financing Receivable, Revolving	0		0			0
Financing Receivable, Revolving, Converted to Term Loan	0		0			0
Total	131,825		131,825			149,807
Loans to individuals [Member] | Personal [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	148,880		148,880			218,471
Financing Receivable Year One Originated Current Fiscal Year Writeoff			2,732	[1]		5,636	[2]
Financing Receivable, Originated, Year Two	180,113		180,113			229,734
Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff			51	[1]		82	[2]
Financing Receivable, Originated, Year Three	187,526		187,526			149,418
Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff			45	[1]		96	[2]
Financing Receivable, Originated, Year Four	133,462		133,462			136,270
Financing Receivable Year Four Originated Three Years Before Current Fiscal Year Writeoff			26	[1]		43	[2]
Financing Receivable, Originated, Year Five	110,840		110,840			75,503
Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff			0	[1]		0	[2]
Financing Receivable, Originated, More Than Five Years	171,434		171,434			137,641
Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff			0	[1]		10	[2]
Financing Receivable, Revolving	501,199		501,199			505,920
Financing Receivable Revolving Writeoff			26	[1]		6	[2]
Financing Receivable, Revolving, Converted to Term Loan	92		92			148
Financing Receivable Revolving Converted to Term Writeoff			20	[1]		26	[2]
Total	1,433,546		1,433,546			1,453,105
Financing Receivable, Allowance for Credit Loss, Writeoff			2,900	[1]		5,899	[2]
Performing [Member] | Commercial [Member] | Healthcare [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	275,268		275,268			650,768
Financing Receivable, Originated, Year Two	625,281		625,281			895,602
Financing Receivable, Originated, Year Three	921,843		921,843			590,736
Financing Receivable, Originated, Year Four	565,653		565,653			409,001
Financing Receivable, Originated, Year Five	379,669		379,669			331,897
Financing Receivable, Originated, More Than Five Years	992,889		992,889			809,858
Financing Receivable, Revolving	262,814		262,814			281,378
Financing Receivable, Revolving, Converted to Term Loan	12		12			15
Total	4,023,429		4,023,429			3,969,255
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	15,000		15,000			0
Financing Receivable, Originated, Year Three	31,907		31,907			0
Financing Receivable, Originated, Year Four	1,178		1,178			21,791
Financing Receivable, Originated, Year Five	0		0			0
Financing Receivable, Originated, More Than Five Years	49,823		49,823			31,235
Financing Receivable, Revolving	505		505			5
Financing Receivable, Revolving, Converted to Term Loan	0		0			0
Total	98,413		98,413			53,031
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	0		0			2,128
Financing Receivable, Originated, Year Three	110		110			18,508
Financing Receivable, Originated, Year Four	18,287		18,287			6,911
Financing Receivable, Originated, Year Five	58,103		58,103			0
Financing Receivable, Originated, More Than Five Years	10,896		10,896			10,896
Financing Receivable, Revolving	975		975			975
Financing Receivable, Revolving, Converted to Term Loan	0		0			0
Total	88,371		88,371			39,418
Performing [Member] | Commercial [Member] | Services [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	330,400		330,400			900,090
Financing Receivable, Originated, Year Two	735,946		735,946			526,776
Financing Receivable, Originated, Year Three	506,992		506,992			401,872
Financing Receivable, Originated, Year Four	350,009		350,009			228,818
Financing Receivable, Originated, Year Five	211,087		211,087			106,112
Financing Receivable, Originated, More Than Five Years	691,191		691,191			643,477
Financing Receivable, Revolving	704,785		704,785			730,729
Financing Receivable, Revolving, Converted to Term Loan	459		459			595
Total	3,530,869		3,530,869			3,538,469
Performing [Member] | Commercial [Member] | Services [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	1,814		1,814			1,085
Financing Receivable, Originated, Year Three	1,035		1,035			1,520
Financing Receivable, Originated, Year Four	898		898			1,341
Financing Receivable, Originated, Year Five	0		0			534
Financing Receivable, Originated, More Than Five Years	8,330		8,330			4,522
Financing Receivable, Revolving	1,758		1,758			81
Financing Receivable, Revolving, Converted to Term Loan	0		0			0
Total	13,835		13,835			9,083
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	0		0			13,712
Financing Receivable, Originated, Year Three	17,437		17,437			178
Financing Receivable, Originated, Year Four	147		147			326
Financing Receivable, Originated, Year Five	1,607		1,607			3,972
Financing Receivable, Originated, More Than Five Years	8,929		8,929			3,746
Financing Receivable, Revolving	436		436			3,108
Financing Receivable, Revolving, Converted to Term Loan	719		719			13
Total	29,275		29,275			25,055
Performing [Member] | Commercial [Member] | Energy [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	55,874		55,874			190,122
Financing Receivable, Originated, Year Two	103,305		103,305			100,006
Financing Receivable, Originated, Year Three	78,634		78,634			43,769
Financing Receivable, Originated, Year Four	2,707		2,707			7,876
Financing Receivable, Originated, Year Five	7,288		7,288			9,562
Financing Receivable, Originated, More Than Five Years	20,140		20,140			11,583
Financing Receivable, Revolving	3,123,257		3,123,257			3,025,590
Financing Receivable, Revolving, Converted to Term Loan	0		0			0
Total	3,391,205		3,391,205			3,388,508
Performing [Member] | Commercial [Member] | Energy [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	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	0		0			0
Financing Receivable, Revolving	17,662		17,662			13,950
Financing Receivable, Revolving, Converted to Term Loan	0		0			0
Total	17,662		17,662			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			0
Financing Receivable, Originated, Year Five	0		0			0
Financing Receivable, Originated, More Than Five Years	0		0			0
Financing Receivable, Revolving	13,950		13,950			16,800
Financing Receivable, Revolving, Converted to Term Loan	0		0			0
Total	13,950		13,950			16,800
Performing [Member] | Commercial [Member] | General business [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	543,566		543,566			942,468
Financing Receivable, Originated, Year Two	741,365		741,365			436,832
Financing Receivable, Originated, Year Three	376,769		376,769			224,735
Financing Receivable, Originated, Year Four	191,698		191,698			138,951
Financing Receivable, Originated, Year Five	128,816		128,816			101,100
Financing Receivable, Originated, More Than Five Years	346,596		346,596			287,744
Financing Receivable, Revolving	1,918,875		1,918,875			1,389,128
Financing Receivable, Revolving, Converted to Term Loan	1,733		1,733			2,164
Total	4,249,418		4,249,418			3,523,122
Performing [Member] | Commercial [Member] | General business [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	2,488		2,488			10,264
Financing Receivable, Originated, Year Two	15,760		15,760			16,167
Financing Receivable, Originated, Year Three	5,201		5,201			8,420
Financing Receivable, Originated, Year Four	11,765		11,765			1,253
Financing Receivable, Originated, Year Five	535		535			321
Financing Receivable, Originated, More Than Five Years	1,764		1,764			8,295
Financing Receivable, Revolving	9,307		9,307			897
Financing Receivable, Revolving, Converted to Term Loan	0		0			0
Total	46,820		46,820			45,617
Performing [Member] | Commercial [Member] | General business [Member] | Accruing Substandard [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0			4,401
Financing Receivable, Originated, Year Two	4,090		4,090			33,194
Financing Receivable, Originated, Year Three	38,900		38,900			1,716
Financing Receivable, Originated, Year Four	1,542		1,542			27
Financing Receivable, Originated, Year Five	1,193		1,193			0
Financing Receivable, Originated, More Than Five Years	6,539		6,539			0
Financing Receivable, Revolving	9,301		9,301			31,992
Financing Receivable, Revolving, Converted to Term Loan	163		163			0
Total	61,728		61,728			71,330
Performing [Member] | Commercial real estate [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	39,377		39,377			396,891
Financing Receivable, Originated, Year Two	449,401		449,401			1,941,913
Financing Receivable, Originated, Year Three	2,084,982		2,084,982			1,194,759
Financing Receivable, Originated, Year Four	919,126		919,126			416,647
Financing Receivable, Originated, Year Five	343,462		343,462			513,555
Financing Receivable, Originated, More Than Five Years	1,025,082		1,025,082			705,092
Financing Receivable, Revolving	136,787		136,787			136,095
Financing Receivable, Revolving, Converted to Term Loan	0		0			0
Total	4,998,217		4,998,217			5,304,952
Performing [Member] | Commercial real estate [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	403		403			476
Financing Receivable, Originated, Year Three	14,907		14,907			0
Financing Receivable, Originated, Year Four	32,131		32,131			0
Financing Receivable, Originated, Year Five	0		0			0
Financing Receivable, Originated, More Than Five Years	16,949		16,949			19,171
Financing Receivable, Revolving	0		0			0
Financing Receivable, Revolving, Converted to Term Loan	0		0			0
Total	64,390		64,390			19,647
Performing [Member] | Commercial real estate [Member] | Accruing Substandard [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0			2,992
Financing Receivable, Originated, Year Two	0		0			0
Financing Receivable, Originated, Year Three	0		0			3
Financing Receivable, Originated, Year Four	0		0			0
Financing Receivable, Originated, Year Five	0		0			0
Financing Receivable, Originated, More Than Five Years	8,085		8,085			2,733
Financing Receivable, Revolving	0		0			0
Financing Receivable, Revolving, Converted to Term Loan	0		0			0
Total	8,085		8,085			5,728
Performing [Member] | Loans to individuals [Member] | Residential mortgage [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	249,631		249,631			426,089
Financing Receivable, Originated, Year Two	377,061		377,061			320,733
Financing Receivable, Originated, Year Three	308,510		308,510			342,927
Financing Receivable, Originated, Year Four	330,796		330,796			349,742
Financing Receivable, Originated, Year Five	332,439		332,439			54,801
Financing Receivable, Originated, More Than Five Years	267,548		267,548			243,356
Financing Receivable, Revolving	378,185		378,185			375,739
Financing Receivable, Revolving, Converted to Term Loan	21,123		21,123			23,895
Total	2,265,293		2,265,293			2,137,282
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			157
Financing Receivable, Originated, Year Two	42		42			140
Financing Receivable, Originated, Year Three	193		193			131
Financing Receivable, Originated, Year Four	176		176			1,361
Financing Receivable, Originated, Year Five	0		0			18
Financing Receivable, Originated, More Than Five Years	155		155			134
Financing Receivable, Revolving	1,575		1,575			2,982
Financing Receivable, Revolving, Converted to Term Loan	0		0			93
Total	2,141		2,141			5,016
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	49		49			150
Financing Receivable, Originated, Year Three	0		0			0
Financing Receivable, Originated, Year Four	3		3			0
Financing Receivable, Originated, Year Five	0		0			37
Financing Receivable, Originated, More Than Five Years	0		0			49
Financing Receivable, Revolving	1,113		1,113			50
Financing Receivable, Revolving, Converted to Term Loan	0		0			0
Total	1,165		1,165			286
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			633
Financing Receivable, Originated, Year Two	893		893			1,788
Financing Receivable, Originated, Year Three	3,466		3,466			2,220
Financing Receivable, Originated, Year Four	2,727		2,727			4,297
Financing Receivable, Originated, Year Five	3,982		3,982			6,441
Financing Receivable, Originated, More Than Five Years	114,140		114,140			124,719
Financing Receivable, Revolving	0		0			0
Financing Receivable, Revolving, Converted to Term Loan	0		0			0
Total	125,208		125,208			140,098
Performing [Member] | Loans to individuals [Member] | Personal [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	148,880		148,880			218,401
Financing Receivable, Originated, Year Two	180,029		180,029			229,580
Financing Receivable, Originated, Year Three	187,435		187,435			149,291
Financing Receivable, Originated, Year Four	133,383		133,383			136,215
Financing Receivable, Originated, Year Five	110,809		110,809			75,348
Financing Receivable, Originated, More Than Five Years	171,280		171,280			137,629
Financing Receivable, Revolving	499,184		499,184			503,841
Financing Receivable, Revolving, Converted to Term Loan	92		92			145
Total	1,431,092		1,431,092			1,450,450
Performing [Member] | Loans to individuals [Member] | Personal [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0			66
Financing Receivable, Originated, Year Two	28		28			39
Financing Receivable, Originated, Year Three	35		35			106
Financing Receivable, Originated, Year Four	65		65			30
Financing Receivable, Originated, Year Five	15		15			8
Financing Receivable, Originated, More Than Five Years	2		2			0
Financing Receivable, Revolving	1		1			1,918
Financing Receivable, Revolving, Converted to Term Loan	0		0			3
Total	146		146			2,170
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	30		30			64
Financing Receivable, Originated, Year Three	12		12			12
Financing Receivable, Originated, Year Four	3		3			9
Financing Receivable, Originated, Year Five	7		7			144
Financing Receivable, Originated, More Than Five Years	144		144			0
Financing Receivable, Revolving	1,990		1,990			3
Financing Receivable, Revolving, Converted to Term Loan	0		0			0
Total	2,186		2,186			232
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	1,375		1,375			0
Financing Receivable, Originated, Year Three	237		237			0
Financing Receivable, Originated, Year Four	0		0			30,290
Financing Receivable, Originated, Year Five	0		0			23,129
Financing Receivable, Originated, More Than Five Years	19,233		19,233			28,110
Financing Receivable, Revolving	0		0			0
Financing Receivable, Revolving, Converted to Term Loan	0		0			0
Total	20,845		20,845			81,529
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			0
Financing Receivable, Originated, Year Three	0		0			1,635
Financing Receivable, Originated, Year Four	1,361		1,361			338
Financing Receivable, Originated, Year Five	363		363			0
Financing Receivable, Originated, More Than Five Years	0		0			0
Financing Receivable, Revolving	1,441		1,441			1,643
Financing Receivable, Revolving, Converted to Term Loan	0		0			0
Total	3,165		3,165			3,616
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	80		80			99
Financing Receivable, Revolving	28,588		28,588			17,744
Financing Receivable, Revolving, Converted to Term Loan	0		0			0
Total	28,668		28,668			17,843
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	994		994			1,134
Financing Receivable, Originated, Year Three	66		66			0
Financing Receivable, Originated, Year Four	0		0			0
Financing Receivable, Originated, Year Five	0		0			0
Financing Receivable, Originated, More Than Five Years	35		35			48
Financing Receivable, Revolving	4,658		4,658			5,956
Financing Receivable, Revolving, Converted to Term Loan	3		3			5
Total	5,756		5,756			7,143
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	2,885		2,885			0
Financing Receivable, Originated, Year Three	0		0			0
Financing Receivable, Originated, Year Four	0		0			0
Financing Receivable, Originated, Year Five	0		0			7,170
Financing Receivable, Originated, More Than Five Years	9,998		9,998			150
Financing Receivable, Revolving	0		0			0
Financing Receivable, Revolving, Converted to Term Loan	0		0			0
Total	12,883		12,883			7,320
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			79
Financing Receivable, Originated, Year Two	107		107			1,419
Financing Receivable, Originated, Year Three	433		433			237
Financing Receivable, Originated, Year Four	434		434			544
Financing Receivable, Originated, Year Five	510		510			344
Financing Receivable, Originated, More Than Five Years	8,218		8,218			12,381
Financing Receivable, Revolving	2,377		2,377			2,387
Financing Receivable, Revolving, Converted to Term Loan	548		548			665
Total	12,627		12,627			18,056
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			0
Financing Receivable, Originated, Year Four	0		0			280
Financing Receivable, Originated, Year Five	280		280			375
Financing Receivable, Originated, More Than Five Years	6,337		6,337			9,054
Financing Receivable, Revolving	0		0			0
Financing Receivable, Revolving, Converted to Term Loan	0		0			0
Total	6,617		6,617			9,709
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			4
Financing Receivable, Originated, Year Two	26		26			51
Financing Receivable, Originated, Year Three	44		44			9
Financing Receivable, Originated, Year Four	11		11			16
Financing Receivable, Originated, Year Five	9		9			3
Financing Receivable, Originated, More Than Five Years	8		8			12
Financing Receivable, Revolving	24		24			158
Financing Receivable, Revolving, Converted to Term Loan	0		0			0
Total	$ 122		$ 122			$ 253
[1] Includes charge-offs on deposit overdrafts, which are generally charged off at 60 days past due. Includes charge-offs on deposit overdrafts, which are generally charged off at 60 days past due.

Loans and Allowances for Cred_5

Loans and Allowances for Credit Losses Loans and Allowances for Credit Losses, Nonaccrual (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	$ 90,683	$ 145,469
Financing Receivable, Nonaccrual, No Allowance	78,986	102,380
Financing Receivable, Nonaccrual, With Allowance	11,697	43,089
Financing Receivable, Nonaccrual, Related Allowance	2,214	2,692
Commercial [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	58,434	110,131
Financing Receivable, Nonaccrual, No Allowance	46,737	67,042
Financing Receivable, Nonaccrual, With Allowance	11,697	43,089
Financing Receivable, Nonaccrual, Related Allowance	2,214	2,692
Commercial [Member] | Healthcare [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	20,845	81,529
Financing Receivable, Nonaccrual, No Allowance	10,930	40,372
Financing Receivable, Nonaccrual, With Allowance	9,915	41,157
Financing Receivable, Nonaccrual, Related Allowance	1,700	1,478
Commercial [Member] | Services [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	3,165	3,616
Financing Receivable, Nonaccrual, No Allowance	1,521	1,684
Financing Receivable, Nonaccrual, With Allowance	1,644	1,932
Financing Receivable, Nonaccrual, Related Allowance	441	1,214
Commercial [Member] | Energy [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	28,668	17,843
Financing Receivable, Nonaccrual, No Allowance	28,668	17,843
Financing Receivable, Nonaccrual, With Allowance	0	0
Financing Receivable, Nonaccrual, Related Allowance	0	0
Commercial [Member] | General business [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	5,756	7,143
Financing Receivable, Nonaccrual, No Allowance	5,618	7,143
Financing Receivable, Nonaccrual, With Allowance	138	0
Financing Receivable, Nonaccrual, Related Allowance	73	0
Commercial real estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	12,883	7,320
Financing Receivable, Nonaccrual, No Allowance	12,883	7,320
Financing Receivable, Nonaccrual, With Allowance	0	0
Financing Receivable, Nonaccrual, Related Allowance	0	0
Loans to individuals [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	19,366	28,018
Financing Receivable, Nonaccrual, No Allowance	19,366	28,018
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	12,627	18,056
Financing Receivable, Nonaccrual, No Allowance	12,627	18,056
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	122	253
Financing Receivable, Nonaccrual, No Allowance	122	253
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	6,617	9,709
Financing Receivable, Nonaccrual, No Allowance	6,617	9,709
Financing Receivable, Nonaccrual, With Allowance	0	0
Financing Receivable, Nonaccrual, Related Allowance	$ 0	$ 0

Loans and Allowances for Cred_6

Loans and Allowances for Credit Losses, Modifications (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Financing Receivable, Loan Modifications [Line Items]
Financing Receivable, Modified in Period, Amount	$ 114	$ 58
Number of Days Past Due Following Modification to be Considered a Payment Default	30 days
Commercial [Member] | Extended Maturity
Financing Receivable, Loan Modifications [Line Items]
Financing Receivable, Modified in Period, Amount	$ 110
Healthcare [Member] | Commercial [Member]
Financing Receivable, Loan Modifications [Line Items]
Financing Receivable, Modified in Period, Amount	90	37
Healthcare [Member] | Commercial [Member] | Extended Maturity and Interest Rate Reduction
Financing Receivable, Loan Modifications [Line Items]
Financing Receivable, Modified in Period, Amount		26
General business [Member] | Commercial [Member]
Financing Receivable, Loan Modifications [Line Items]
Financing Receivable, Modified in Period, Amount		10
Healthcare, Services and General business member | Extended Maturity
Financing Receivable, Loan Modifications [Line Items]
Financing Receivable, Modified in Period, Amount		20
Residential Mortgage [Member] | Loans to individuals [Member]
Financing Receivable, Loan Modifications [Line Items]
Financing Receivable, Modified, Subsequent Default		4.4
Energy [Member] | Commercial [Member]
Financing Receivable, Loan Modifications [Line Items]
Financing Receivable, Modified in Period, Amount	14
US Government Agency Insured Loans [Member] | Loans to individuals [Member] | Extended Maturity and Interest Rate Reduction
Financing Receivable, Loan Modifications [Line Items]
Financing Receivable, Modified in Period, Amount	4.1	11
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		11
Financing Receivable, Modified, Subsequent Default	$ 1.1	$ 4.3

Loans and Allowances for Cred_7

Loans and Allowances for Credit Losses, By Aging Category (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	$ 49,542	$ 48,371
Current and Past Due Performing Loans	24,553,581	23,904,968
30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	37,177	55,411
60 to 89 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	26,220	50,082
90 Days or More [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	79,881	93,644
Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	24,410,303	23,705,831
Commercial [Member]
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	2,866	0
Current and Past Due Performing Loans	15,623,409	14,803,769
Commercial [Member] | 30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	2,419	18,433
Commercial [Member] | 60 to 89 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	5,736	31,447
Commercial [Member] | 90 Days or More [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	19,566	29,890
Commercial [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	15,595,688	14,723,999
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	4,231,058	4,143,233
Commercial [Member] | Healthcare [Member] | 30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	1,375	18,019
Commercial [Member] | Healthcare [Member] | 60 to 89 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	4,415	30,290
Commercial [Member] | Healthcare [Member] | 90 Days or More [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	10,763	23,588
Commercial [Member] | Healthcare [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	4,214,505	4,071,336
Commercial [Member] | Services [Member]
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	72	0
Current and Past Due Performing Loans	3,577,144	3,576,223
Commercial [Member] | Services [Member] | 30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	0	2
Commercial [Member] | Services [Member] | 60 to 89 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	1,158	0
Commercial [Member] | Services [Member] | 90 Days or More [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	435	434
Commercial [Member] | Services [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	3,575,551	3,575,787
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	3,451,485	3,437,101
Commercial [Member] | Energy [Member] | 30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	0	0
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	3,451,485	3,437,101
Commercial [Member] | General business [Member]
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	2,794	0
Current and Past Due Performing Loans	4,363,722	3,647,212
Commercial [Member] | General business [Member] | 30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	1,044	412
Commercial [Member] | General business [Member] | 60 to 89 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	163	1,157
Commercial [Member] | General business [Member] | 90 Days or More [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	8,368	5,868
Commercial [Member] | General business [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	4,354,147	3,639,775
Commercial real estate [Member]
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	0	3
Current and Past Due Performing Loans	5,083,575	5,337,647
Commercial real estate [Member] | 30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	0	2,992
Commercial real estate [Member] | 60 to 89 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	3,021	0
Commercial real estate [Member] | 90 Days or More [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	7,138	7,174
Commercial real estate [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	5,073,416	5,327,481
Loans to individuals [Member]
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	46,676	48,368
Current and Past Due Performing Loans	3,846,597	3,763,552
Loans to individuals [Member] | 30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	34,758	33,986
Loans to individuals [Member] | 60 to 89 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	17,463	18,635
Loans to individuals [Member] | 90 Days or More [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	53,177	56,580
Loans to individuals [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	3,741,199	3,654,351
Loans to individuals [Member] | Residential mortgage [Member]
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	97	36
Current and Past Due Performing Loans	2,281,226	2,160,640
Loans to individuals [Member] | Residential mortgage [Member] | 30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	9,907	6,340
Loans to individuals [Member] | Residential mortgage [Member] | 60 to 89 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	1,615	1,494
Loans to individuals [Member] | Residential mortgage [Member] | 90 Days or More [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	1,759	2,879
Loans to individuals [Member] | Residential mortgage [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	2,267,945	2,149,927
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	46,579	48,201
Current and Past Due Performing Loans	131,825	149,807
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	23,918	25,085
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	15,796	17,053
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	51,418	53,547
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	40,693	54,122
Loans to individuals [Member] | Personal [Member]
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	0	131
Current and Past Due Performing Loans	1,433,546	1,453,105
Loans to individuals [Member] | Personal [Member] | 30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	933	2,561
Loans to individuals [Member] | Personal [Member] | 60 to 89 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	52	88
Loans to individuals [Member] | Personal [Member] | 90 Days or More [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	0	154
Loans to individuals [Member] | Personal [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	$ 1,432,561	$ 1,450,302

Mortgage Banking Activities, Co

Mortgage Banking Activities, Components of Loans Held For Sale (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
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	105,922		$ 56,922
Residential mortgage loans held for sale, Fair value	105,706		56,457
Residential mortgage loans held for sale	$ 107,465		$ 56,935
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	$ 62,960		$ 34,783
Derivative, Net fair value	$ 1,945		$ 1,379
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		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		90 days
Components of Residential Mortgage Loans Held for Sale [Abstract]
Derivative, Notional Amount	$ 127,010		$ 75,448
Derivative, Net fair value	$ (186)		$ (901)

Mortgage Banking Activities Mor

Mortgage Banking Activities Mortgage Banking Activities, Mortgage Banking Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Mortgage Banking Revenue [Abstract]
Net realized gains (losses) on sale of mortgage loans	$ 2,338	$ (296)	$ 4,364	$ (2,027)
Net change in unrealized gain (loss) on mortgage loans held for sale	631	(496)	249	(126)
Net change in the fair value of mortgage loan commitments	(528)	(865)	566	775
Net change in the fair value of forward sales contracts	(72)	1,373	715	461
Total production revenue (loss)	2,369	(284)	5,894	(917)
Servicing revenue	16,259	15,425	31,701	30,425
Total mortgage banking revenue	$ 18,628	$ 15,141	$ 37,595	$ 29,508

Mortgage Banking Activities, Mo

Mortgage Banking Activities, Mortgage Servicing Rights (Details)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
Summary of Mortgage Servicing Rights [Abstract]
Number of residential mortgage loans serviced for others	125,698		125,698		115,967
Outstanding principal balance of residential mortgage loans serviced for others	$ 22,188,347,000		$ 22,188,347,000		$ 20,382,192,000
Weighted average interest rate	3.68%		3.68%		3.64%
Remaining term (in months)			278 months		280 months
Servicing Asset at Fair Value, Amount [Roll Forward]
Beginning balance	$ 319,330,000	$ 299,803,000	$ 293,884,000	$ 277,608,000	$ 277,608,000
Additions	4,454,000	4,103,000	6,970,000	6,603,000
Acquisitions	14,021,000	0	31,421,000	31,138,000
Changes due to principal payments	(8,012,000)	(8,445,000)	(13,459,000)	(13,829,000)
Change in fair value due to market assumption changes	3,453,000	9,261,000	14,430,000	3,202,000
Ending balance	$ 333,246,000	$ 304,722,000	$ 333,246,000	$ 304,722,000	$ 293,884,000
Servicing Assets at Fair Value, Assumptions Used to Estimate Fair Value [Abstract]
Discount rate - risk-free rate plus a market premium (in hundredths)			9.91%		9.72%
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Prepayment Speed			6.75%		7.34%
Loan servicing costs - annually per loan based upon loan type, performing, minimum (in dollars per loan)			$ 73		$ 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)			4.38%		3.90%
Primary secondary mortgage rate spread	115		115		105
Delinquency rate			2.48%		2.06%

Commitments and Contingent Li_2

Commitments and Contingent Liabilities (Details) - USD ($) $ in Millions		3 Months Ended
	Apr. 08, 2024	Jun. 30, 2024
Bank Participation in Fraudulent Sale of Securities by Principals [Member] | Pending Litigation [Member]
Litigation Settlement [Abstract]
Outstanding principal accrued interest and other amounts upon sale of facilities securing payment of the bonds		$ 33
Loss Contingency, Damages Sought, Value		$ 3
Visa Membership
Loss Contingencies [Line Items]
Potential Exchange Offer Program Conversion Percentage	5,000%
Common Stock Class B Shares Owned		252,233
Common Stock Owned		200,212
Common Stock Class B-2 Shares Owned		126,116

Commitments and Contingent Li_3

Commitments and Contingent Liabilities Variable Interest Entities (Details) $ in Millions	Jun. 30, 2024 USD ($)
Other Assets [Member]
Variable Interest Entity [Line Items]
Amortization Method Qualified Affordable Housing Project Investments	$ 412
Other Liabilities [Member]
Variable Interest Entity [Line Items]
Qualified Affordable Housing Project Investments, Commitment	$ 107

Shareholders' Equity (Details)

Shareholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		6 Months Ended
	Jul. 30, 2024	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Dividends declared (in dollars per share)		$ 0.55	$ 0.54	$ 1.10	$ 1.08
Schedule of Accumulated Other Income (Loss) [Abstract]
Balance, Beginning of Period				$ (599,100)	$ (836,955)
Net change in unrealized gain (loss)		$ (5,943)	$ (160,408)	(77,749)	(36,363)
Interest revenue, Investment securities		12,027	16,033	24,210	32,084
Loss (gain) on available for sale securities, net		(34)	3,010	45,137	3,010
Other comprehensive income, before income taxes		6,050	(141,365)	(8,402)	(1,269)
Federal and state income taxes		1,424	(33,247)	(2,000)	(1,552)
Other comprehensive income, net of income taxes		4,626	(108,118)	(6,402)	283
Balance, End of Period		(605,502)	(836,672)	(605,502)	(836,672)
Accumulated Net Unrealized Gain (Loss) on Available for Sale Securities [Member]
Schedule of Accumulated Other Income (Loss) [Abstract]
Balance, Beginning of Period				(473,212)	(664,618)
Net change in unrealized gain (loss)				(77,749)	(36,363)
Interest revenue, Investment securities				0	0
Loss (gain) on available for sale securities, net				45,137	3,010
Other comprehensive income, before income taxes				(32,612)	(33,353)
Federal and state income taxes				(7,695)	(8,839)
Other comprehensive income, net of income taxes				(24,917)	(24,514)
Balance, End of Period		(498,129)	(689,132)	(498,129)	(689,132)
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				(125,888)	(172,337)
Net change in unrealized gain (loss)				0	0
Interest revenue, Investment securities				24,210	32,084
Loss (gain) on available for sale securities, net				0	0
Other comprehensive income, before income taxes				24,210	32,084
Federal and state income taxes				5,695	7,287
Other comprehensive income, net of income taxes				18,515	24,797
Balance, End of Period		$ (107,373)	$ (147,540)	$ (107,373)	$ (147,540)
Subsequent Event [Member]
Dividends Payable, Date Declared	Jul. 30, 2024
Dividends declared (in dollars per share)	$ 0.55
Dividends Payable, Date to be Paid	Aug. 30, 2024
Dividends Payable, Date of Record	Aug. 15, 2024

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Numerator: [Abstract]
Net income attributable to BOK Financial Corp. shareholders	$ 163,713	$ 151,308	$ 247,416	$ 313,676
Less: Earnings allocated to participating securities	1,602	1,202	2,278	2,457
Numerator for basic earnings per share – income available to common shareholders	162,111	150,106	245,138	311,219
Effect of reallocating undistributed earnings of participating securities	0	0	0	0
Numerator for diluted earnings per share – income available to common shareholders	$ 162,111	$ 150,106	$ 245,138	$ 311,219
Denominator: [Abstract]
Weighted average shares outstanding (in shares)	64,343,898	66,521,728	64,578,226	66,684,603
Less: Participating securities included in weighted average shares (in shares)	629,694	527,596	576,072	522,555
Denominator for basic earnings per common share (in shares)	63,714,204	65,994,132	64,002,154	66,162,048
Dilutive effect of employee stock compensation plans (in shares)	0	0	0	0
Denominator for diluted earnings per common share (in shares)	63,714,204	65,994,132	64,002,154	66,162,048
Basic earnings per share	$ 2.54	$ 2.27	$ 3.83	$ 4.70
Diluted earnings per share	$ 2.54	$ 2.27	$ 3.83	$ 4.70

Reportable Segments (Details)

Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Segment Reporting Information [Line Items]
Net interest income from external sources	$ 296,021	$ 322,261	$ 589,593	$ 674,609
Net interest income (expense) from internal sources	0	0	0	0
Net interest income	296,021	322,261	589,593	674,609
Net loans charged off and provisions for credit losses	8,000	17,000	16,000	33,000
Net interest income after provision for credit losses	288,021	305,261	573,593	641,609
Other operating revenue	259,704	209,049	421,405	386,914
Other operating expense	336,690	318,673	677,074	624,485
Net direct contribution	211,035	195,637	317,924	404,038
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	211,035	195,637	317,924	404,038
Federal and state income taxes	47,303	44,001	70,498	89,906
Net income	163,732	151,636	247,426	314,132
Net income attributable to non-controlling interests	19	328	10	456
Net income attributable to BOK Financial Corp. shareholders	163,713	151,308	247,416	313,676
Average assets	51,195,199	47,908,107	50,611,385	46,950,607
Operating Segments [Member] | Commercial [Member]
Segment Reporting Information [Line Items]
Net interest income from external sources	283,328	299,712	566,084	587,970
Net interest income (expense) from internal sources	(79,593)	(77,975)	(158,354)	(139,134)
Net interest income	203,735	221,737	407,730	448,836
Net loans charged off and provisions for credit losses	6,134	6,000	10,294	6,076
Net interest income after provision for credit losses	197,601	215,737	397,436	442,760
Other operating revenue	54,536	68,828	104,542	125,673
Other operating expense	76,114	77,559	146,209	150,693
Net direct contribution	176,023	207,006	355,769	417,740
Gain (loss) on financial instruments, net	168	231	335	173
Change in fair value of mortgage servicing rights	0	0	0	0
Gain (loss) on repossessed assets, net	0	408	0	1,267
Corporate expense allocations	17,381	21,404	35,778	39,122
Net income before taxes	158,810	186,241	320,326	380,058
Federal and state income taxes	39,247	45,462	78,966	92,610
Net income	119,563	140,779	241,360	287,448
Net income attributable to non-controlling interests	0	0	0	0
Net income attributable to BOK Financial Corp. shareholders	119,563	140,779	241,360	287,448
Average assets	30,305,613	28,170,869	30,056,215	28,166,923
Operating Segments [Member] | Consumer [Member]
Segment Reporting Information [Line Items]
Net interest income from external sources	6,192	17,828	13,542	38,974
Net interest income (expense) from internal sources	58,972	50,260	115,757	96,324
Net interest income	65,164	68,088	129,299	135,298
Net loans charged off and provisions for credit losses	1,247	1,129	3,055	2,313
Net interest income after provision for credit losses	63,917	66,959	126,244	132,985
Other operating revenue	36,252	32,277	72,459	62,887
Other operating expense	55,128	52,340	108,575	102,538
Net direct contribution	45,041	46,896	90,128	93,334
Gain (loss) on financial instruments, net	(3,577)	(10,257)	(13,240)	(14,930)
Change in fair value of mortgage servicing rights	3,453	9,261	14,430	3,202
Gain (loss) on repossessed assets, net	9	0	116	14
Corporate expense allocations	13,392	12,318	27,564	23,940
Net income before taxes	31,534	33,582	63,870	57,680
Federal and state income taxes	7,417	7,898	15,022	13,566
Net income	24,117	25,684	48,848	44,114
Net income attributable to non-controlling interests	0	0	0	0
Net income attributable to BOK Financial Corp. shareholders	24,117	25,684	48,848	44,114
Average assets	9,630,470	9,597,723	9,511,225	9,765,186
Operating Segments [Member] | Wealth Management [Member]
Segment Reporting Information [Line Items]
Net interest income from external sources	2,612	4,415	9,611	25,355
Net interest income (expense) from internal sources	26,889	29,426	48,288	44,087
Net interest income	29,501	33,841	57,899	69,442
Net loans charged off and provisions for credit losses	0	(45)	(15)	(69)
Net interest income after provision for credit losses	29,501	33,886	57,914	69,511
Other operating revenue	113,208	123,043	231,912	231,954
Other operating expense	90,214	84,587	189,502	166,342
Net direct contribution	52,495	72,342	100,324	135,123
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	16,484	12,784	31,263	25,310
Net income before taxes	36,011	59,558	69,061	109,813
Federal and state income taxes	8,514	14,056	16,336	25,927
Net income	27,497	45,502	52,725	83,886
Net income attributable to non-controlling interests	0	0	0	0
Net income attributable to BOK Financial Corp. shareholders	27,497	45,502	52,725	83,886
Average assets	16,452,098	12,949,258	16,105,713	12,309,730
Funds Management and Other [Member]
Segment Reporting Information [Line Items]
Net interest income from external sources	3,889	306	356	22,310
Net interest income (expense) from internal sources	(6,268)	(1,711)	(5,691)	(1,277)
Net interest income	(2,379)	(1,405)	(5,335)	21,033
Net loans charged off and provisions for credit losses	619	9,916	2,666	24,680
Net interest income after provision for credit losses	(2,998)	(11,321)	(8,001)	(3,647)
Other operating revenue	55,708	(15,099)	12,492	(33,600)
Other operating expense	115,234	104,187	232,788	204,912
Net direct contribution	(62,524)	(130,607)	(228,297)	(242,159)
Gain (loss) on financial instruments, net	3,409	10,026	12,905	14,757
Change in fair value of mortgage servicing rights	(3,453)	(9,261)	(14,430)	(3,202)
Gain (loss) on repossessed assets, net	(9)	(408)	(116)	(1,281)
Corporate expense allocations	(47,257)	(46,506)	(94,605)	(88,372)
Net income before taxes	(15,320)	(83,744)	(135,333)	(143,513)
Federal and state income taxes	(7,875)	(23,415)	(39,826)	(42,197)
Net income	(7,445)	(60,329)	(95,507)	(101,316)
Net income attributable to non-controlling interests	19	328	10	456
Net income attributable to BOK Financial Corp. shareholders	(7,464)	(60,657)	(95,517)	(101,772)
Average assets	$ (5,192,982)	$ (2,809,743)	$ (5,061,768)	$ (3,291,232)

Fees and Commissions Revenue _3

Fees and Commissions Revenue Fees and Commissions (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2024		Jun. 30, 2023		Jun. 30, 2024		Jun. 30, 2023
Disaggregation of Revenue [Line Items]
Total fees and commissions	$ 200,027		$ 200,497		$ 400,591		$ 386,476
Fees and commissions revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	200,027		200,497		400,591		386,476
Fees and commission revenue not from contracts with customers	65,430	[1]	77,322	[2]	139,185	[3]	139,800	[4]
Fees and commissions revenue from contracts with customers	134,597	[5]	123,175	[6]	261,406	[7]	246,676	[8]
Brokerage and trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	53,017		65,006		112,196		117,402
Fees and commission revenue not from contracts with customers	38,402	[1]	54,015	[2]	85,278	[3]	93,565	[4]
Fees and commissions revenue from contracts with customers	14,615	[5]	10,991	[6]	26,918	[7]	23,837	[8]
Trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	27,695		36,921		65,152		64,519
Fees and commission revenue not from contracts with customers	27,695	[1]	36,921	[2]	65,152	[3]	64,519	[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	6,765		13,642		13,090		21,996
Fees and commission revenue not from contracts with customers	6,765	[1]	13,642	[2]	13,090	[3]	21,996	[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	4,838		3,321		9,531		7,165
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	4,838	[5]	3,321	[6]	9,531	[7]	7,165	[8]
Insurance brokerage revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions			2,857				6,163
Fees and commission revenue not from contracts with customers			0	[2]			0	[4]
Fees and commissions revenue from contracts with customers			2,857	[6]			6,163	[8]
Investment banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	13,719		8,265		24,423		17,559
Fees and commission revenue not from contracts with customers	3,942	[1]	3,452	[2]	7,036	[3]	7,050	[4]
Fees and commissions revenue from contracts with customers	9,777	[5]	4,813	[6]	17,387	[7]	10,509	[8]
Transaction card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	27,246		26,003		52,739		51,624
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	27,246	[5]	26,003	[6]	52,739	[7]	51,624	[8]
TransFund EFT network revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	22,640		21,375		43,914		42,767
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	22,640	[5]	21,375	[6]	43,914	[7]	42,767	[8]
Merchant services revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	2,510		2,504		4,699		4,662
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	2,510	[5]	2,504	[6]	4,699	[7]	4,662	[8]
Corporate card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	2,096		2,124		4,126		4,195
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	2,096	[5]	2,124	[6]	4,126	[7]	4,195	[8]
Fiduciary and asset management revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	57,576		52,997		112,881		103,654
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	57,576	[5]	52,997	[6]	112,881	[7]	103,654	[8]
Personal trust revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	26,770		25,315		51,115		48,842
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	26,770	[5]	25,315	[6]	51,115	[7]	48,842	[8]
Corporate trust revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	8,646		7,201		17,906		14,861
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	8,646	[5]	7,201	[6]	17,906	[7]	14,861	[8]
Institutional trust & retirement plan services revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	16,519		13,707		32,667		26,960
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	16,519	[5]	13,707	[6]	32,667	[7]	26,960	[8]
Investment management services and other revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	5,641		6,774		11,193		12,991
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	5,641	[5]	6,774	[6]	11,193	[7]	12,991	[8]
Deposit service charges and fees [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	29,572		27,100		58,257		53,068
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	29,572	[5]	27,100	[6]	58,257	[7]	53,068	[8]
Commercial account service charge revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	16,550		14,380		32,527		28,227
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	16,550	[5]	14,380	[6]	32,527	[7]	28,227	[8]
Overdraft fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	5,433		5,141		10,893		10,014
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	5,433	[5]	5,141	[6]	10,893	[7]	10,014	[8]
Check card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	6,049		5,975		11,719		11,614
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	6,049	[5]	5,975	[6]	11,719	[7]	11,614	[8]
Automated service charge and other deposit fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	1,540		1,604		3,118		3,213
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	1,540	[5]	1,604	[6]	3,118	[7]	3,213	[8]
Mortgage banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	18,628		15,141		37,595		29,508
Fees and commission revenue not from contracts with customers	18,628	[1]	15,141	[2]	37,595	[3]	29,508	[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	2,369		(284)		5,894		(917)
Fees and commission revenue not from contracts with customers	2,369	[1]	(284)	[2]	5,894	[3]	(917)	[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	16,259		15,425		31,701		30,425
Fees and commission revenue not from contracts with customers	16,259	[1]	15,425	[2]	31,701	[3]	30,425	[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	13,988		14,250		26,923		31,220
Fees and commission revenue not from contracts with customers	8,400	[1]	8,166	[2]	16,312	[3]	16,727	[4]
Fees and commissions revenue from contracts with customers	5,588	[5]	6,084	[6]	10,611	[7]	14,493	[8]
Operating Segments [Member] | Commercial [Member] | Fees and commissions revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	53,720		59,704		104,350		115,539
Operating Segments [Member] | Commercial [Member] | Brokerage and trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	7,514		16,353		15,076		26,538
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	3,408		12,839		7,151		19,326
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
Operating Segments [Member] | Commercial [Member] | Investment banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	4,106		3,514		7,925		7,212
Operating Segments [Member] | Commercial [Member] | Transaction card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	26,253		24,811		50,637		49,245
Operating Segments [Member] | Commercial [Member] | TransFund EFT network revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	21,883		20,483		42,349		40,982
Operating Segments [Member] | Commercial [Member] | Merchant services revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	2,502		2,494		4,682		4,644
Operating Segments [Member] | Commercial [Member] | Corporate card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	1,868		1,834		3,606		3,619
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	15,681		13,663		30,886		26,796
Operating Segments [Member] | Commercial [Member] | Commercial account service charge revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	15,395		13,364		30,295		26,235
Operating Segments [Member] | Commercial [Member] | Overdraft fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	27		32		63		57
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	259		267		528		504
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	4,272		4,877		7,751		12,960
Operating Segments [Member] | Consumer [Member] | Fees and commissions revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	36,252		32,361		72,459		62,942
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
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	784		917		1,619		1,833
Operating Segments [Member] | Consumer [Member] | TransFund EFT network revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	776		907		1,602		1,815
Operating Segments [Member] | Consumer [Member] | Merchant services revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	8		10		17		18
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	13,164		12,805		25,995		25,083
Operating Segments [Member] | Consumer [Member] | Commercial account service charge revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	552		530		1,083		1,029
Operating Segments [Member] | Consumer [Member] | Overdraft fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	5,374		5,066		10,768		9,894
Operating Segments [Member] | Consumer [Member] | Check card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	6,049		5,976		11,719		11,614
Operating Segments [Member] | Consumer [Member] | Automated service charge and other deposit fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	1,189		1,233		2,425		2,546
Operating Segments [Member] | Consumer [Member] | Mortgage banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	19,333		15,709		38,973		30,634
Operating Segments [Member] | Consumer [Member] | Mortgage production revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	2,369		(284)		5,894		(917)
Operating Segments [Member] | Consumer [Member] | Mortgage servicing revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	16,964		15,993		33,079		31,551
Operating Segments [Member] | Consumer [Member] | Other revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	2,971		2,930		5,872		5,392
Operating Segments [Member] | Wealth Management [Member] | Fees and commissions revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	113,208		123,050		231,912		231,961
Operating Segments [Member] | Wealth Management [Member] | Brokerage and trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	45,193		47,691		96,248		88,135
Operating Segments [Member] | Wealth Management [Member] | Trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	27,695		36,921		65,152		64,519
Operating Segments [Member] | Wealth Management [Member] | Customer hedging revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	3,047		(159)		5,067		(59)
Operating Segments [Member] | Wealth Management [Member] | Retail brokerage revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	4,838		3,321		9,531		7,165
Operating Segments [Member] | Wealth Management [Member] | Insurance brokerage revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions			2,857				6,163
Operating Segments [Member] | Wealth Management [Member] | Investment banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	9,613		4,751		16,498		10,347
Operating Segments [Member] | Wealth Management [Member] | Transaction card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	142		167		303		327
Operating Segments [Member] | Wealth Management [Member] | TransFund EFT network revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	(19)		(17)		(37)		(34)
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	161		184		340		361
Operating Segments [Member] | Wealth Management [Member] | Fiduciary and asset management revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	57,576		52,998		112,881		103,676
Operating Segments [Member] | Wealth Management [Member] | Personal trust revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	26,770		25,315		51,115		48,842
Operating Segments [Member] | Wealth Management [Member] | Corporate trust revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	8,646		7,201		17,906		14,861
Operating Segments [Member] | Wealth Management [Member] | Institutional trust & retirement plan services revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	16,519		13,707		32,667		26,960
Operating Segments [Member] | Wealth Management [Member] | Investment management services and other revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	5,641		6,775		11,193		13,013
Operating Segments [Member] | Wealth Management [Member] | Deposit service charges and fees [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	727		633		1,376		1,189
Operating Segments [Member] | Wealth Management [Member] | Commercial account service charge revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	603		488		1,149		965
Operating Segments [Member] | Wealth Management [Member] | Overdraft fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	32		42		62		62
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	92		103		165		162
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	9,570		21,561		21,104		38,634
Funds Management and Other [Member] | Fees and commissions revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	(3,153)		(14,618)		(8,130)		(23,966)
Funds Management and Other [Member] | Brokerage and trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	310		962		872		2,729
Funds Management and Other [Member] | Trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Funds Management and Other [Member] | Customer hedging revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	310		962		872		2,729
Funds Management and Other [Member] | Retail brokerage revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Funds Management and Other [Member] | Insurance brokerage revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions			0				0
Funds Management and Other [Member] | Investment banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Funds Management and Other [Member] | Transaction card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	67		108		180		219
Funds Management and Other [Member] | TransFund EFT network revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		2		0		4
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	67		106		180		215
Funds Management and Other [Member] | Fiduciary and asset management revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		(1)		0		(22)
Funds Management and Other [Member] | Personal trust revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		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		0		0		0
Funds Management and Other [Member] | Investment management services and other revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		(1)		0		(22)
Funds Management and Other [Member] | Deposit service charges and fees [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		(1)		0		0
Funds Management and Other [Member] | Commercial account service charge revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		(2)		0		(2)
Funds Management and Other [Member] | Overdraft fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		1		0		1
Funds Management and Other [Member] | Check card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		(1)		0		0
Funds Management and Other [Member] | Automated service charge and other deposit fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		1		0		1
Funds Management and Other [Member] | Mortgage banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	(705)		(568)		(1,378)		(1,126)
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	(705)		(568)		(1,378)		(1,126)
Funds Management and Other [Member] | Other revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	$ (2,825)		$ (15,118)		$ (7,804)		$ (25,766)
[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. Out of scope revenue generally relates to financial instruments or contractual rights and obligations within the scope of other applicable accounting guidance. Revenue from Contracts with Customers. Revenue from Contracts with Customers. Revenue from Contracts with Customers.

Fair Value Measurements, Fair V

Fair Value Measurements, Fair Value Of Financial Instruments as Measured On a Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2024		Mar. 31, 2024	Dec. 31, 2023		Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022
Assets: [Abstract]
Trading securities	$ 5,212,791			$ 5,193,505
Available for sale securities	12,793,784			12,286,681
Fair value option securities	19,050			20,671
Mortgage servicing rights	333,246		$ 319,330	293,884		$ 304,722	$ 299,803	$ 277,608
Derviative contracts, net of cash collateral, Assets, Fair value	225,076			410,304
Liabilities: [Abstract]
Derivative contracts, net of cash collateral, Liabilities, Fair Value	287,509			587,473
U.S. government securities [Member]
Assets: [Abstract]
Trading securities	71,169			10,959
Residential agency mortgage-backed securities [Member]
Assets: [Abstract]
Trading securities	5,023,892			5,105,137
Available for sale securities	8,108,567			6,834,720
Fair value option securities	19,050			20,671
Municipal securities [Member]
Assets: [Abstract]
Trading securities	56,780			37,413
Available for sale securities	278,043			502,833
U.S. Treasury [Member]
Assets: [Abstract]
Available for sale securities	923			925
Residential non-agency mortgage-backed securities [Member]
Assets: [Abstract]
Available for sale securities	828,049			799,877
Commercial agency mortgage-backed securities [Member]
Assets: [Abstract]
Available for sale securities	3,577,729			4,147,853
Other debt securities [Member]
Assets: [Abstract]
Trading securities	60,950			39,996
Available for sale securities	473			473
Fair Value, Recurring [Member]
Assets: [Abstract]
Trading securities	5,212,791			5,193,505
Available for sale securities	12,793,784			12,286,681
Residential mortgage loans held for sale	107,465	[1]		56,935	[2]
Mortgage servicing rights	333,246	[3]		293,884	[4]
Derviative contracts, net of cash collateral, Assets, Fair value	225,076	[5]		410,304	[6]
Liabilities: [Abstract]
Derivative contracts, net of cash collateral, Liabilities, Fair Value	287,509	[5]		587,473	[6]
Fair Value, Recurring [Member] | U.S. government securities [Member]
Assets: [Abstract]
Trading securities	71,169			10,959
Fair Value, Recurring [Member] | Residential agency mortgage-backed securities [Member]
Assets: [Abstract]
Trading securities	5,023,892			5,105,137
Available for sale securities	8,108,567			6,834,720
Fair value option securities	19,050			20,671
Fair Value, Recurring [Member] | Municipal securities [Member]
Assets: [Abstract]
Trading securities	56,780			37,413
Available for sale securities	278,043			502,833
Fair Value, Recurring [Member] | Other trading securities
Assets: [Abstract]
Trading securities	60,950			39,996
Fair Value, Recurring [Member] | U.S. Treasury [Member]
Assets: [Abstract]
Available for sale securities	923			925
Fair Value, Recurring [Member] | Residential non-agency mortgage-backed securities [Member]
Assets: [Abstract]
Available for sale securities	828,049			799,877
Fair Value, Recurring [Member] | Commercial agency mortgage-backed securities [Member]
Assets: [Abstract]
Available for sale securities	3,577,729			4,147,853
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	69,955			9,017
Available for sale securities	923			925
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	3,699	[5]		0	[6]
Liabilities: [Abstract]
Derivative contracts, net of cash collateral, Liabilities, Fair Value	658	[5]		2,607	[6]
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | U.S. government securities [Member]
Assets: [Abstract]
Trading securities	69,955			9,017
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	923			925
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	5,142,836			5,184,488
Available for sale securities	12,792,388			12,285,283
Residential mortgage loans held for sale	100,364	[1]		49,749	[2]
Mortgage servicing rights	0	[3]		0	[4]
Derviative contracts, net of cash collateral, Assets, Fair value	221,377	[5]		410,304	[6]
Liabilities: [Abstract]
Derivative contracts, net of cash collateral, Liabilities, Fair Value	286,851	[5]		584,866	[6]
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | U.S. government securities [Member]
Assets: [Abstract]
Trading securities	1,214			1,942
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Residential agency mortgage-backed securities [Member]
Assets: [Abstract]
Trading securities	5,023,892			5,105,137
Available for sale securities	8,108,567			6,834,720
Fair value option securities	19,050			20,671
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Municipal securities [Member]
Assets: [Abstract]
Trading securities	56,780			37,413
Available for sale securities	278,043			502,833
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Other trading securities
Assets: [Abstract]
Trading securities	60,950			39,996
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	828,049			799,877
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Commercial agency mortgage-backed securities [Member]
Assets: [Abstract]
Available for sale securities	3,577,729			4,147,853
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	7,101	[1]		7,186	[2]
Mortgage servicing rights	333,246	[3]		293,884	[4]
Derviative contracts, net of cash collateral, Assets, Fair value	$ 0	[5]		$ 0	[6]
Liquidity Discount on Mortgage Loans Qualifying for Sale to US Govt Agencies	79.41%			77.74%
Liabilities: [Abstract]
Derivative contracts, net of cash collateral, Liabilities, Fair Value	$ 0	[5]		$ 0	[6]
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 79.41% of the unpaid principal balance. 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 77.74% of the unpaid principal balance. 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. 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. See 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 See 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 Measurements, Fair_2

Fair Value Measurements, Fair Value Measured On a Nonrecurring Basis (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other gains (losses), net	$ 57,375	$ 12,618	$ 61,644	$ 14,869
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	6,349	6,797	10,033	8,787
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		(101)
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	65	0	65	0
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		547		547
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Nonaccruing Loans [Member] | Management knowledge of industry and non-real estate collateral | Discounted Cash Flow [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	$ 10,065	12,048	$ 10,065	12,048
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Real estate and other repossessed assets [Member] | Management knowledge of industry and non-real estate collateral | Discounted Cash Flow [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		$ 0		$ 0

Fair Value Measurements Fair Va

Fair Value Measurements Fair Value Measurement, Measured On Non-Recurring Basis, Signfiicant Unobservable Inputs, Quantitative Information (Details) - Fair Value, Nonrecurring [Member] - Nonaccruing Loans [Member] - Fair Value, Inputs, Level 3 [Member] - USD ($) $ in Thousands	Jun. 30, 2024		Jun. 30, 2023
Discounted Cash Flow [Member] | Management knowledge of industry and non-real estate collateral
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure	$ 10,065		$ 12,048
Minimum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value of Impaired Loans as Percentage of Unpaid Principal Balance	4%	[1]	44%	[2]
Maximum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value of Impaired Loans as Percentage of Unpaid Principal Balance	90%	[1]	62%	[2]
Weighted Average [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value of Impaired Loans as Percentage of Unpaid Principal Balance	45%	[1]	58%	[2]
[1] Represents fair value as a percentage of the unpaid principal balance. Represents fair value as a percentage of the unpaid principal balance.

Fair Value Measurements, Financ

Fair Value Measurements, Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2024		Mar. 31, 2024	Dec. 31, 2023		Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	$ 5,212,791			$ 5,193,505
Debt Securities, Held-to-maturity, gross	2,269,560			2,409,090
Investment securities, Allowance for Credit Loss	(287)	[1]		(336)	[2]
Investment Securities, Amortized Cost, After Allowance for Credit Loss	2,269,273			2,408,754
Available for sale securities	12,793,784			12,286,681
Fair value option securities	19,050			20,671
Residential mortgage loans held for sale	107,465			56,935
Loans	24,553,581			23,904,968
Allowance for loan losses	(287,826)			(277,123)
Loans, net of allowance	24,265,755			23,627,845
Mortgage servicing rights	333,246		$ 319,330	293,884		$ 304,722	$ 299,803	$ 277,608
Derviative contracts, net of cash collateral, Assets, Fair value	225,076			410,304
Time deposits	3,463,935			3,012,022
Subordinated debentures	131,156			131,150
Derivative contracts, net of cash collateral, Liabilities, Fair Value	287,509			587,473
Commercial [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	15,623,409			14,803,769
Allowance for loan losses	(150,737)			(141,232)
Commercial real estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	5,083,575			5,337,647
Allowance for loan losses	(96,256)			(94,718)
Loans to individuals [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	3,846,597			3,763,552
Allowance for loan losses	(40,833)			(41,173)
U.S. government securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	71,169			10,959
Residential agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	5,023,892			5,105,137
Debt Securities, Held-to-maturity, gross	2,129,826			2,255,340
Available for sale securities	8,108,567			6,834,720
Fair value option securities	19,050			20,671
Municipal securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	56,780			37,413
Debt Securities, Held-to-maturity, gross	107,188			120,705
Available for sale securities	278,043			502,833
U.S. Treasury [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	923			925
Residential non-agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	828,049			799,877
Commercial agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Securities, Held-to-maturity, gross	17,258			17,258
Available for sale securities	3,577,729			4,147,853
Other debt securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	60,950			39,996
Debt Securities, Held-to-maturity, gross	15,288			15,787
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	897,811			947,613
Interest-bearing cash and cash equivalents	178,352			400,652
Trading securities	5,212,791			5,193,505
Debt Securities, Held-to-maturity, gross	2,129,168			2,244,489
Investment securities, Allowance for Credit Loss	(287)			(336)
Investment Securities, Amortized Cost, After Allowance for Credit Loss	2,128,881			2,244,153
Available for sale securities	12,793,784			12,286,681
Residential mortgage loans held for sale	107,465			56,935
Loans	24,553,581			23,904,968
Allowance for loan losses	(287,826)			(277,123)
Loans, net of allowance	24,265,755			23,627,845
Mortgage servicing rights	333,246			293,884
Derviative contracts, net of cash collateral, Assets, Fair value	225,076			410,304
Deposits with no stated maturity	32,777,709			31,007,679
Time deposits	3,463,935			3,012,022
Other borrowed funds	7,342,296			8,824,300
Subordinated debentures	131,156			131,150
Derivative contracts, net of cash collateral, Liabilities, Fair Value	287,509			587,473
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Commercial [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	15,623,409			14,803,769
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Commercial real estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	5,083,575			5,337,647
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Loans to individuals [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	3,846,597			3,763,552
Carrying (Reported) Amount, Fair Value Disclosure [Member] | U.S. government securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	71,169			10,959
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	5,023,892			5,105,137
Debt Securities, Held-to-maturity, gross	1,990,626			2,092,083
Available for sale securities	8,108,567			6,834,720
Fair value option securities	19,050			20,671
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Municipal securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	56,780			37,413
Debt Securities, Held-to-maturity, gross	107,188			120,705
Available for sale securities	278,043			502,833
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Other trading securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	60,950			39,996
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	923			925
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	828,049			799,877
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	16,066			15,914
Available for sale securities	3,577,729			4,147,853
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	15,288			15,787
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	897,811			947,613
Interest-bearing cash and cash equivalents	178,352			400,652
Trading securities	5,212,791			5,193,505
Debt Securities, Held-to-maturity, gross	1,924,532			2,072,586
Investment securities, Allowance for Credit Loss	0			0
Investment Securities, Amortized Cost, After Allowance for Credit Loss	1,924,532			2,072,586
Available for sale securities	12,793,784			12,286,681
Residential mortgage loans held for sale	107,465			56,935
Loans	24,295,523			23,768,385
Allowance for loan losses	0			0
Loans, net of allowance	24,295,523			23,768,385
Mortgage servicing rights	333,246			293,884
Derviative contracts, net of cash collateral, Assets, Fair value	225,076			410,304
Deposits with no stated maturity	32,777,709			31,007,679
Time deposits	3,439,777			2,993,685
Other borrowed funds	7,342,295			8,824,299
Subordinated debentures	119,428			115,798
Derivative contracts, net of cash collateral, Liabilities, Fair Value	287,509			587,473
Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	15,594,663			14,862,873
Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial real estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	4,988,792			5,270,657
Estimate of Fair Value, Fair Value Disclosure [Member] | Loans to individuals [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	3,712,068			3,634,855
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	71,169			10,959
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	5,023,892			5,105,137
Debt Securities, Held-to-maturity, gross	1,786,096			1,917,810
Available for sale securities	8,108,567			6,834,720
Fair value option securities	19,050			20,671
Estimate of Fair Value, Fair Value Disclosure [Member] | Municipal securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	56,780			37,413
Debt Securities, Held-to-maturity, gross	109,700			125,525
Available for sale securities	278,043			502,833
Estimate of Fair Value, Fair Value Disclosure [Member] | Other trading securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	60,950			39,996
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	923			925
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	828,049			799,877
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	15,030			15,067
Available for sale securities	3,577,729			4,147,853
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	13,706			14,184
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	897,811			947,613
Interest-bearing cash and cash equivalents	178,352			400,652
Trading securities	69,955			9,017
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	923			925
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	3,699			0
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	658			2,607
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	69,955			9,017
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	923			925
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	5,142,836			5,184,488
Debt Securities, Held-to-maturity, gross	1,826,821			1,959,366
Investment securities, Allowance for Credit Loss	0			0
Investment Securities, Amortized Cost, After Allowance for Credit Loss	1,826,821			1,959,366
Available for sale securities	12,792,388			12,285,283
Residential mortgage loans held for sale	100,364			49,749
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	221,377			410,304
Deposits with no stated maturity	32,777,709			0
Time deposits	0			0
Other borrowed funds	0			0
Subordinated debentures	119,428			115,798
Derivative contracts, net of cash collateral, Liabilities, Fair Value	286,851			584,866
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	1,214			1,942
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	5,023,892			5,105,137
Debt Securities, Held-to-maturity, gross	1,786,096			1,917,810
Available for sale securities	8,108,567			6,834,720
Fair value option securities	19,050			20,671
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	56,780			37,413
Debt Securities, Held-to-maturity, gross	11,989			12,305
Available for sale securities	278,043			502,833
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	60,950			39,996
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	828,049			799,877
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	15,030			15,067
Available for sale securities	3,577,729			4,147,853
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	13,706			14,184
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	97,711			113,220
Investment securities, Allowance for Credit Loss	0			0
Investment Securities, Amortized Cost, After Allowance for Credit Loss	97,711			113,220
Available for sale securities	473			473
Residential mortgage loans held for sale	7,101			7,186
Loans	24,295,523			23,768,385
Allowance for loan losses	0			0
Loans, net of allowance	24,295,523			23,768,385
Mortgage servicing rights	333,246			293,884
Derviative contracts, net of cash collateral, Assets, Fair value	0			0
Deposits with no stated maturity	0			31,007,679
Time deposits	3,439,777			2,993,685
Other borrowed funds	7,342,295			8,824,299
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	15,594,663			14,862,873
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	4,988,792			5,270,657
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	3,712,068			3,634,855
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	97,711			113,220
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 $140 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. Carrying value includes $165 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.