BOK Financial (BOKF) 10-Q 2 Aug 23 2023 Q2 Quarterly report Financial data

Document And Entity Information

Document And Entity Information	6 Months Ended
	Jun. 30, 2023 shares
Document and Entity Information [Abstract]
Entity Incorporation, State or Country Code	OK
Entity Tax Identification Number	73-1373454
Entity Address, Address Line One	Boston Avenue at Second Street
Entity Address, City or Town	Tulsa,
Entity Address, State or Province	OK
Document Transition Report	false
Document Quarterly Report	true
Entity Registrant Name	BOK FINANCIAL CORP
Entity Central Index Key	0000875357
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding	66,369,208
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q2
Document Type	10-Q
Entity File Number	001-37811
Amendment Flag	false
Document Period End Date	Jun. 30, 2023
City Area Code	918
Local Phone Number	588-6000
Entity Address, Postal Zip Code	74192
Current Fiscal Year End Date	--12-31
Title of 12(b) Security	Common Stock, par value $0.00006 per share
Trading Symbol	BOKF
Security Exchange Name	NASDAQ

Consolidated Statements of Earn

Consolidated Statements of Earnings (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Interest revenue [Abstract]
Loans	$ 399,182	$ 204,015	$ 767,052	$ 382,388
Residential mortgage loans held for sale	1,092	1,559	2,071	2,953
Trading securities	47,821	22,958	81,830	63,933
Investment securities	8,586	3,485	17,514	5,839
Available for sale securities	94,589	58,672	183,325	116,604
Fair value option securities	3,116	437	7,009	928
Restricted equity securities	6,429	1,384	12,237	2,491
Interest-bearing cash and cash equivalents	9,552	1,737	16,058	2,210
Total interest revenue	570,367	294,247	1,087,096	577,346
Interest expense [Abstract]
Deposits	136,666	13,862	231,940	21,460
Borrowed funds	109,221	4,894	176,259	10,682
Subordinated debentures	2,219	1,473	4,288	2,775
Total interest expense	248,106	20,229	412,487	34,917
Net interest revenue	322,261	274,018	674,609	542,429
Provision for credit losses	17,000	0	33,000	0
Net interest revenue after provision for credit losses	305,261	274,018	641,609	542,429
Total fees and commissions	200,497	173,373	386,476	271,008
Other gains (losses), net	12,618	(7,639)	14,869	(9,283)
Loss on derivatives, net	(8,159)	(13,569)	(9,503)	(60,550)
Loss on fair value option securities, net	(2,158)	(2,221)	(5,120)	(13,422)
Change in fair value of mortgage servicing rights	9,261	17,485	3,202	66,595
Gain (loss) on available for sale securities, net	(3,010)	1,188	(3,010)	2,125
Total other operating revenue	209,049	168,617	386,914	256,473
Other operating expense [Abstract]
Personnel	190,652	154,923	372,797	314,151
Business promotion	7,640	6,325	16,209	12,838
Charitable contributions to BOKF Foundation	1,142	0	1,142	0
Professional fees and services	12,777	12,475	25,825	23,888
Net occupancy and equipment	30,105	27,489	58,564	58,344
Insurance	6,974	4,728	14,289	9,011
Data processing and communications	45,307	41,280	90,109	81,116
Printing, postage and supplies	3,728	3,929	7,621	7,618
Amortization of intangible assets	3,474	4,049	6,865	8,013
Mortgage banking costs	8,300	9,437	14,082	17,314
Other expense	8,574	9,020	16,982	18,980
Total other operating expense	318,673	273,655	624,485	551,273
Net income before taxes	195,637	168,980	404,038	247,629
Federal and state income taxes	44,001	36,122	89,906	52,319
Net income	151,636	132,858	314,132	195,310
Net income (loss) attributable to non-controlling interests	328	12	456	(24)
Net income attributable to BOK Financial Corporation shareholders	$ 151,308	$ 132,846	$ 313,676	$ 195,334
Earnings Per Share [Abstract]
Basic	$ 2.27	$ 1.96	$ 4.70	$ 2.87
Diluted	$ 2.27	$ 1.96	$ 4.70	$ 2.87
Average shares used in computation: [Abstract]
Basic	65,994,132	67,453,748	66,162,048	67,616,396
Diluted	65,994,132	67,455,172	66,162,048	67,617,834
Dividends declared per share	$ 0.54	$ 0.53	$ 1.08	$ 1.06
Brokerage and trading revenue [Member]
Total fees and commissions	$ 65,006	$ 44,043	$ 117,402	$ 16,964
Transaction card revenue [Member]
Total fees and commissions	26,003	26,940	51,624	51,156
Fiduciary and asset management revenue [Member]
Total fees and commissions	52,997	49,838	103,654	96,237
Deposit service charges and fees [Member]
Total fees and commissions	27,100	28,500	53,068	55,504
Mortgage banking revenue [Member]
Total fees and commissions	15,141	11,368	29,508	28,018
Other revenue [Member]
Total fees and commissions	$ 14,250	$ 12,684	$ 31,220	$ 23,129

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 151,636	$ 132,858	$ 314,132	$ 195,310
Other Comprehensive Income (Loss), before Tax [Abstract]
Net change in unrealized gain (loss)	(160,408)	(242,536)	(36,363)	(881,577)
Reclassification Adjustments Included in Earnings [Abstract]
Interest revenue, Investment securities	16,033	2,455	32,084	2,455
Loss (gain) on available for sale securities, net	3,010	(1,188)	3,010	(2,125)
Other comprehensive income (loss) before income taxes	(141,365)	(241,269)	(1,269)	(881,247)
Federal and state income taxes	(33,247)	(56,467)	(1,552)	(206,248)
Other comprehensive income (loss), net of income taxes	(108,118)	(184,802)	283	(674,999)
Comprehensive income (loss)	43,518	(51,944)	314,415	(479,689)
Comprehensive income (loss) attributable to non-controlling interests	328	12	456	(24)
Comprehensive income (loss) attributable to BOK Financial Corp. shareholders	$ 43,190	$ (51,956)	$ 313,959	$ (479,665)

Consolidated Balance Sheets (Un

Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Assets [Abstract]
Cash and due from banks	$ 875,714	$ 943,810
Interest-bearing cash and cash equivalents	571,616	457,906
Trading securities	5,442,364	4,464,161
Investment securities, net of allowance	2,374,071	2,513,687
Available for sale securities	11,938,523	11,493,860
Fair value option securities	212,321	296,590
Restricted equity securities	330,086	299,651
Residential mortgage loans held for sale	94,820	75,272
Loans	23,237,659	22,557,150
Allowance for loan losses	(262,714)	(235,704)
Loans, net of allowance	22,974,945	22,321,446
Premises and equipment, net	617,918	565,175
Receivables	263,915	273,815
Goodwill	1,044,749	1,044,749
Intangible assets, net	69,246	76,131
Mortgage servicing rights	304,722	277,608
Real estate and other repossessed assets, net of allowance	4,227	14,304
Derivative contracts, net	353,037	880,343
Cash surrender value of bank-owned life insurance	411,084	406,751
Receivable on unsettled securities sales	133,909	31,004
Other assets	1,220,653	1,354,379
Total assets	49,237,920	47,790,642
Deposits [Abstract]
Noninterest-bearing demand deposits	10,782,548	13,395,337
Interest-bearing deposits: [Abstract]
Transaction	18,907,981	18,659,115
Savings	897,937	964,411
Time	2,706,377	1,461,842
Total deposits	33,294,843	34,480,705
Funds purchased and repurchase agreements	5,446,864	2,270,377
Other borrowings	3,777,056	4,736,908
Subordinated debentures	131,154	131,205
Accrued interest, taxes and expense	228,797	296,870
Derivative contracts, net	550,653	554,900
Due on unsettled securities purchases	400,430	147,470
Other liabilities	540,726	484,849
Total liabilities	44,370,523	43,103,284
Shareholders' equity: [Abstract]
Common stock	5	5
Capital surplus	1,401,509	1,390,395
Retained earnings	5,065,733	4,824,164
Treasury stock	(766,721)	(694,960)
Accumulated other comprehensive income (loss)	(836,672)	(836,955)
Total shareholders' equity	4,863,854	4,682,649
Non-controlling interests	3,543	4,709
Total equity	4,867,397	4,687,358
Total liabilities and equity	$ 49,237,920	$ 47,790,642

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Investment securities [Abstract]
Investment Securities, Fair Value	$ 2,185,384	$ 2,346,768
Real estate and other repossessed assets, allowance	$ (4,406)	$ (10,115)
Shareholders' equity: [Abstract]
Common Stock, Par or Stated Value Per Share	$ 0.00006	$ 0.00006
Common Stock, Shares Authorized	2,500,000,000	2,500,000,000
Common Stock, Shares, Issued	(76,592,098)	(76,423,345)
Common Stock, Shares, Outstanding	(76,592,098)	(76,423,345)
Treasury stock, shares at cost (in shares)	10,222,890	9,464,711

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, 2021		76,254			7,786
Balance, beginning of period at Dec. 31, 2021	$ 5,368,371	$ 5	$ 1,378,794	$ 4,447,691	$ (535,129)	$ 72,371	$ 5,363,732	$ 4,639
Net income	195,310			195,334			195,334	(24)
Other comprehensive income (loss)	(674,999)					(674,999)	(674,999)
Repurchase of common stock (in shares)					770
Repurchase of common stock	(72,478)				$ (72,478)		(72,478)
Stock options exercised (in shares)		1
Stock options exercised	37		37				37
Non-vested shares awarded, net (in shares)		153
Vesting of non-vested shares (in shares)					46
Vesting of non-vested shares	(4,944)				$ (4,944)		(4,944)
Share-based compensation	2,845		2,845				2,845
Cash dividends on common stock	(72,188)			(72,188)			(72,188)
Capital calls and distributions, net	(412)							(412)
Balance, end of period (in shares) at Jun. 30, 2022		76,408			8,602
Balance, end of period at Jun. 30, 2022	4,741,542	$ 5	1,381,676	4,570,837	$ (612,551)	(602,628)	4,737,339	4,203
Balance, beginning of period (in shares) at Mar. 31, 2022		76,412			8,308
Balance, beginning of period at Mar. 31, 2022	4,853,524	$ 5	1,381,666	4,473,884	$ (588,147)	(417,826)	4,849,582	3,942
Net income	132,858			132,846			132,846	12
Other comprehensive income (loss)	(184,802)					(184,802)	(184,802)
Repurchase of common stock (in shares)					294
Repurchase of common stock	(24,404)				$ (24,404)		(24,404)
Stock options exercised (in shares)		0
Stock options exercised	0		0				0
Non-vested shares awarded, net (in shares)		(4)
Vesting of non-vested shares (in shares)					0
Vesting of non-vested shares	0				$ 0		0
Share-based compensation	10		10				10
Cash dividends on common stock	(35,893)			(35,893)			(35,893)
Capital calls and distributions, net	249							249
Balance, end of period (in shares) at Jun. 30, 2022		76,408			8,602
Balance, end of period at Jun. 30, 2022	4,741,542	$ 5	1,381,676	4,570,837	$ (612,551)	(602,628)	4,737,339	4,203
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)
Stock options exercised (in shares)		0
Stock options exercised	0		0				0
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)
Stock options exercised (in shares)		0
Stock options exercised	0		0				0
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

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash Flows From Operating Activities: [Abstract]
Net income	$ 314,132	$ 195,310
Adjustments to reconcile net income to net cash used in operating activities: [Abstract]
Provision for credit losses	33,000	0
Change in fair value of mortgage servicing rights due to market assumption changes	(3,202)	(66,595)
Change in the fair value of mortgage servicing rights due to principal payments	13,829	15,317
Net unrealized (gains) losses from derivative contracts	(25,310)	(47,004)
Share-based compensation	11,114	2,845
Depreciation and amortization	56,583	52,971
Net amortization of discounts and premiums	(8,733)	6,417
Net losses (gains) on financial instruments and other losses (gains), net	(11,617)	7,157
Net loss (gain) on mortgage loans held for sale	2,153	(6,521)
Mortgage loans originated for sale	(353,409)	(779,103)
Proceeds from sale of mortgage loans held for sale	332,944	793,223
Capitalized mortgage servicing rights	(6,603)	(10,969)
Change in trading and fair value option securities	(893,843)	6,283,157
Change in receivables	(82,491)	62,029
Change in other assets	44,365	(17,067)
Change in other liabilities	17,318	(55,875)
Net cash provided by (used in) operating activities	(559,770)	6,435,292
Cash Flows From Investing Activities: [Abstract]
Proceeds from maturities or redemptions of investment securities	140,043	26,730
Proceeds from maturities or redemptions of available for sale securities	656,703	1,365,103
Purchases of investment securities	(2,504)	0
Purchases of available for sale securities	(1,266,764)	(1,919,632)
Proceeds from sales of available for sale securities	135,489	211,301
Change in amount receivable on unsettled available for sale securities transactions	(10,548)	(19,793)
Loans originated, net of principal collected	(678,700)	(1,070,725)
Net payments on derivative asset contracts	156,205	151,559
Net change in restricted equity securities	(30,435)	(12,017)
Proceeds from disposition of assets	29,136	11,559
Purchases of assets	(97,875)	(119,302)
Net cash provided by (used in) investing activities	(969,250)	(1,375,217)
Cash Flows From Financing Activities: [Abstract]
Net change in demand deposits, transaction deposits and savings accounts	(2,430,397)	(2,288,412)
Net change in time deposits	1,244,535	(334,729)
Net change in other borrowed funds	2,208,867	(1,671,503)
Net proceeds on derivative liability contracts	(151,457)	(131,361)
Net change in derivative margin accounts	707,266	(1,417,338)
Change in amount due on unsettled available for sale securities transactions	139,688	132,781
Issuance of common and treasury stock, net	(4,695)	(4,907)
Repurchase of common stock	(67,066)	(72,478)
Dividends paid	(72,107)	(72,188)
Net cash provided by (used in) financing activities	1,574,634	(5,860,135)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	45,614	(800,060)
Cash and cash equivalents at beginning of period	1,401,716	2,837,410
Cash and cash equivalents at end of period	1,447,330	2,037,350
Supplemental Cash Flow Information: [Abstract]
Cash paid for interest	401,187	35,094
Cash paid for taxes	123,821	66,862
Net loans and bank premises transferred to repossessed real estate and other assets	225	4,080
Transfer of available for sale securities to investment securities	0	2,454,273
Residential mortgage loans guaranteed by U.S. government agencies that became eligible for repurchase during the period	7,768	20,836
Conveyance of other real estate owned guaranteed by U.S. government agencies	2,569	3,478
Right-of-use assets obtained in exchange for operating lease liabilities	$ 64,899	$ 15,506

Significant Accounting Policies

Significant Accounting Policies	6 Months Ended
	Jun. 30, 2023
Accounting Policies [Abstract]
Significant Accounting Policies [Text Block]	Basis of Presentation The accompanying unaudited consolidated financial statements of BOK Financial Corporation ("BOK Financial" or "the Company") have been prepared in accordance with accounting principles for interim financial information generally accepted in the United States and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. The unaudited consolidated financial statements include accounts of BOK Financial and its subsidiaries, principally BOKF, NA ("the Bank"), BOK Financial Securities, Inc., and BOK Financial Private Wealth, Inc. Operating divisions of the Bank include Bank of Albuquerque, Bank of Oklahoma, Bank of Texas, BOK Financial in Arizona, Arkansas, Colorado and Kansas/Missouri, BOK Financial Mortgage and the TransFund electronic funds network. Certain reclassifications have been made to conform to the current period presentation. The financial information should be read in conjunction with BOK Financial's 2022 Form 10-K filed with the Securities and Exchange Commission, which contains audited financial statements. Amounts presented as of December 31, 2022 have been derived from the audited financial statements included in BOK Financial's 2022 Form 10-K but do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. Operating results for the six-month period ended June 30, 2023 are not necessarily indicative of the results that may be expected for the year ending December 31, 2023. Newly Adopted and Pending Accounting Policies Financial Accounting Standards Board ("FASB") FASB Accounting Standards Update No. 2022-02, Financial Instruments - Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures ("ASU 2022-02") On March 31, 2022, the FASB issued ASU 2022-02 which eliminates the accounting guidance on troubled debt restructurings ("TDRs") for creditors in ASC 310-40, while also no longer requiring an entity to consider renewals, modifications, and extensions that result from reasonably expected TDRs in their calculation of the allowance for credit losses. For receivables for which there has been a modification in their contractual cash flows, ASU 2022-02 requires disclosure, by class of financing receivable, of the types of modifications, the financial effects of those modifications, and the performance of these modified receivables, along with receivables that had a payment default during the current period and had modifications to the contractual cash flows within 12 months prior to the default. Further, ASU 2022-02 requires entities to disclose gross write-offs recorded in the current period by year of origination in the vintage disclosures on a year-to-date basis. ASU 2022-02 was effective for the Company January 1, 2023. Amendments related to TDR recognition and measurement and vintage disclosures were applied prospectively and are included in Note 4 to the consolidated financial statements. Adoption of this standard did not have a material effect on the Company's financial condition or results of operations.

Securities

Securities	6 Months Ended
	Jun. 30, 2023
Marketable Securities [Abstract]
Securities [Text Block]	Securities Trading Securities The fair value and net unrealized gain (loss) included in trading securities are as follows (in thousands): June 30, 2023 December 31, 2022 Fair Value Net Unrealized Gain (Loss) Fair Value Net Unrealized Gain (Loss) U.S. government securities $ 46,994 $ (13) $ 9,823 $ (16) Residential agency mortgage-backed securities 5,334,372 (33,275) 4,406,848 4 Municipal securities 49,595 140 21,484 (136) Other trading securities 11,403 (129) 26,006 (175) Total trading securities $ 5,442,364 $ (33,277) $ 4,464,161 $ (323) Investment Securities The amortized cost and fair values of investment securities are as follows (in thousands): June 30, 2023 Amortized Carrying Fair Gross Unrealized Cost Value 1 Value Gain Loss Municipal securities $ 136,803 $ 136,803 $ 141,587 $ 5,168 $ (384) Mortgage-backed securities: Residential agency 2,397,098 2,205,685 2,014,427 128 (191,386) Commercial agency 17,259 15,760 14,636 — (1,124) Other debt securities 16,288 16,288 14,734 — (1,554) Total investment securities 2,567,448 2,374,536 2,185,384 5,296 (194,448) Allowance for credit losses (465) (465) — — — Investment securities, net of allowance $ 2,566,983 $ 2,374,071 $ 2,185,384 $ 5,296 $ (194,448) 1 Carrying value includes $193 million of net unrealized loss which remains in Accumulated other comprehensive income ("AOCI") in the Consolidated Balance Sheets related to certain securities transferred during the second quarter of 2022 from the Available for Sale securities portfolio to the Investment securities portfolio. December 31, 2022 Amortized Carrying Fair Gross Unrealized Cost Value 1 Value Gain Loss Municipal securities $ 170,629 $ 170,629 $ 176,621 $ 6,456 $ (464) Mortgage-backed securities: Residential agency 2,538,565 2,315,219 2,143,360 155 (172,014) Commercial agency 17,259 15,609 14,588 — (1,021) Other debt securities 12,788 12,788 12,199 — (589) Total investment securities 2,739,241 2,514,245 2,346,768 6,611 (174,088) Allowance for credit losses (558) (558) — — — Investment securities, net of allowance $ 2,738,683 $ 2,513,687 $ 2,346,768 $ 6,611 $ (174,088) 1 Carrying value includes $225 million of net unrealized loss which remains in Accumulated other comprehensive income ("AOCI") in the Consolidated Balance Sheets related to certain securities transferred during the second quarter of 2022 from the Available for Sale securities portfolio to the Investment securities portfolio. The amortized cost and fair values of investment securities at June 30, 2023, 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 $ 26,633 $ 100,361 $ 41,844 $ 13 $ 168,851 3.59 Fair value 26,772 104,295 39,877 13 170,957 Residential mortgage-backed securities: Carrying value $ 2,205,685 2 Fair value 2,014,427 Total investment securities: Carrying value $ 2,374,536 Fair value 2,185,384 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 5.3 years based upon current prepayment assumptions. Temporarily Impaired Investment Securities (dollars in thousands): June 30, 2023 Number of Securities Less Than 12 Months 12 Months or Longer Total Fair Unrealized Fair Unrealized Fair Unrealized Investment: Municipal securities 20 $ 16,740 $ 79 $ 6,484 $ 305 $ 23,224 $ 384 Mortgage-backed securities: Residential agency 116 2,309 128 2,010,981 191,258 2,013,290 191,386 Commercial agency 2 — — 14,637 1,124 14,637 1,124 Other debt securities 3 8,464 1,536 257 18 8,721 1,554 Total investment securities 141 $ 27,513 $ 1,743 $ 2,032,359 $ 192,705 $ 2,059,872 $ 194,448 December 31, 2022 Number of Securities Less Than 12 Months 12 Months or Longer Total Fair Unrealized Fair Unrealized Fair Unrealized Investment: Municipal securities 22 $ 18,037 $ 406 $ 544 $ 58 $ 18,581 $ 464 Mortgage-backed securities: Residential agency 116 2,142,114 172,014 — — 2,142,114 172,014 Commercial agency 2 14,588 1,021 — — 14,588 1,021 Other debt securities 3 9,428 571 257 18 9,685 589 Total investment securities 143 $ 2,184,167 $ 174,012 $ 801 $ 76 $ 2,184,968 $ 174,088 Available for Sale Securities The amortized cost and fair value of available for sale securities are as follows (in thousands): June 30, 2023 Amortized Fair Gross Unrealized Cost Value Gain Loss U.S. Treasury $ 1,000 $ 901 $ — $ (99) Municipal securities 547,510 491,715 — (55,795) Mortgage-backed securities: Residential agency 6,492,794 6,114,202 852 (379,444) Residential non-agency 746,481 699,178 10,458 (57,761) Commercial agency 5,049,144 4,632,054 556 (417,646) Other debt securities 500 473 — (27) Total available for sale securities $ 12,837,429 $ 11,938,523 $ 11,866 $ (910,772) December 31, 2022 Amortized Fair Gross Unrealized Cost Value Gain Loss U.S. Treasury $ 1,000 $ 898 $ — $ (102) Municipal securities 687,875 624,500 321 (63,696) Mortgage-backed securities: Residential agency 6,161,358 5,814,496 13,085 (359,947) Residential non-agency 616,423 577,576 11,776 (50,623) Commercial agency 4,892,257 4,475,917 3,479 (419,819) Other debt securities 500 473 — (27) Total available for sale securities $ 12,359,413 $ 11,493,860 $ 28,661 $ (894,214) The amortized cost and fair values of available for sale securities at June 30, 2023, 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 $ 180,223 $ 2,894,432 $ 1,987,608 $ 535,891 $ 5,598,154 5.71 Fair value 178,499 2,675,529 1,769,950 501,165 5,125,143 Residential mortgage-backed securities: Amortized cost $ 7,239,275 2 Fair value 6,813,380 Total available for sale securities: Amortized cost $ 12,837,429 Fair value 11,938,523 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 4.5 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, 2023 2022 2023 2022 Proceeds $ 135,489 $ 156,116 $ 135,489 $ 211,301 Gross realized gains 703 1,461 703 3,394 Gross realized losses (3,713) (273) (3,713) (1,269) Related federal and state income tax expense (708) 278 (708) 497 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 $14.6 billion at June 30, 2023 and $11.2 billion at December 31, 2022. The secured parties do not have the right to sell or repledge these securities. Temporarily Impaired Available for Sale Securities (Dollars in thousands) June 30, 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 $ — $ — $ 901 $ 99 $ 901 $ 99 Municipal securities 192 35,516 1,022 456,199 54,773 491,715 55,795 Mortgage-backed securities: Residential agency 716 2,853,011 74,530 3,035,935 304,914 5,888,946 379,444 Residential non-agency 35 278,467 9,156 369,937 48,605 648,404 57,761 Commercial agency 302 998,353 23,530 3,528,331 394,116 4,526,684 417,646 Other debt securities 1 — — 473 27 473 27 Total available for sale securities 1,247 $ 4,165,347 $ 108,238 $ 7,391,776 $ 802,534 $ 11,557,123 $ 910,772 December 31, 2022 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 $ — $ — $ 899 $ 102 $ 899 $ 102 Municipal securities 227 146,634 5,301 428,248 58,395 574,882 63,696 Mortgage-backed securities: Residential agency 613 3,879,582 256,973 863,732 102,974 4,743,314 359,947 Residential non-agency 26 499,716 50,623 — — 499,716 50,623 Commercial agency 285 1,647,778 63,701 2,535,816 356,118 4,183,594 419,819 Other debt securities 1 — — 473 27 473 27 Total available for sale securities 1,153 $ 6,173,710 $ 376,598 $ 3,829,168 $ 517,616 $ 10,002,878 $ 894,214 Based on evaluations of impaired securities as of June 30, 2023, the Company does not intend to sell any impaired available for sale debt securities before fair value recovers to the current amortized cost, and it is more-likely-than-not that the Company will not be required to sell impaired securities before fair value recovers, which may be maturity. Fair Value Option Securities Fair value option securities represent securities which the Company has elected to carry at fair value and are separately identified on the Consolidated Balance Sheets. Changes in the fair value are recognized in earnings as they occur. Certain securities are held as an economic hedge of the mortgage servicing rights. The fair value and net unrealized gain (loss) included in fair value option securities is as follows (in thousands): June 30, 2023 December 31, 2022 Fair Value Net Unrealized Gain (Loss) Fair Value Net Unrealized Gain (Loss) Residential agency mortgage-backed securities 212,321 (2,492) 296,590 338

Derivatives

Derivatives	6 Months Ended
	Jun. 30, 2023
Derivative Instrument Detail [Abstract]
Derivatives [Text Block]	Derivatives Derivative instruments may be used by the Company as part of its internal risk management programs or may be offered to customers. All derivative instruments are carried at fair value, and changes in fair value are reported in earnings as they occur. Credit risk is also considered in determining fair value. Deterioration in the credit rating of customer or other counterparties reduce the fair value of asset contracts. Deterioration of our credit rating could decrease the fair value of our derivative liabilities. When bilateral netting agreements or similar arrangements exist between the Company and its counterparties that create a single legal claim or obligation to pay or receive the net amount in settlement of the individual derivative contracts, the Company reports derivative assets and liabilities on a net by derivative contract type by counterparty basis. Derivative contracts may require the Company to provide or receive cash margin as collateral for derivative assets and liabilities. Derivative assets and liabilities are reported net of cash margin when certain conditions are met. In addition, derivative contracts executed with customers under Customer Risk Management Programs may be secured by non-cash collateral in conjunction with a credit agreement with that customer. Access to collateral in the event of default is reasonably assured. None of these derivative contracts have been designated as hedging instruments for accounting purposes. Customer Risk Management Programs BOK Financial offers programs to permit its customers to manage various risks, including fluctuations in energy, cattle and other agricultural products, interest rates and foreign exchange rates with derivative contracts. Customers may also manage interest rate risk through interest rate swaps used by borrowers to modify interest rate terms of their loans. Derivative contracts are executed between the customers and BOK Financial. Offsetting contracts are executed between BOK Financial and other selected counterparties to minimize the risk of changes in commodity prices, interest rates or foreign exchange rates. The counterparty contracts are identical to customer contracts, except for a fixed pricing spread or fee paid to BOK Financial as profit and compensation for administrative costs and credit risk which is recognized over the life of the contracts and included in Other operating revenue – Brokerage and trading revenue in the Consolidated Statements of Earnings. Trading BOK Financial may offer derivative instruments such as to-be-announced securities to mortgage banking customers to enable them to manage their market risk or to mitigate the Company's market risk of holding trading securities. Changes in the fair value of derivative instruments for trading purposes or used to mitigate the market risk of holding trading securities are included in Other operating revenue – Brokerage and trading revenue. Internal Risk Management Programs BOK Financial may use derivative contracts in managing its interest rate sensitivity, as part of its economic hedge of the change in the fair value of mortgage servicing rights. Changes in the fair value of derivative instruments used in managing interest rate sensitivity and as part of the economic hedge of changes in the fair value of mortgage servicing rights are included in Other operating revenue – Gain (loss) on derivatives, net in the Consolidated Statements of Earnings. As discussed in Note 5, certain derivative contracts not designated as hedging instruments related to mortgage loan commitments and forward sales contracts are included in Residential mortgage loans held for sale on the Consolidated Balance Sheets. See Note 5 for additional discussion of notional, fair value and impact on earnings of these contracts. The following table summarizes the fair values of derivative contracts recorded as "derivative contracts" assets and liabilities in the balance sheet at June 30, 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 $ 2,667,177 $ 150,410 $ — $ 150,410 $ (146,700) $ 3,710 Energy contracts 8,269,088 914,855 (587,545) 327,310 (120,398) 206,912 Foreign exchange contracts 62,860 60,509 — 60,509 (1,862) 58,647 Equity option contracts 8,107 60 — 60 (56) 4 Total customer risk management programs 11,007,232 1,125,834 (587,545) 538,289 (269,016) 269,273 Trading 24,565,864 133,391 (51,516) 81,875 (153) 81,722 Internal risk management programs 190,000 2,042 — 2,042 — 2,042 Total derivative contracts $ 35,763,096 $ 1,261,267 $ (639,061) $ 622,206 $ (269,169) $ 353,037 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 $ 2,667,177 $ 150,412 $ — $ 150,412 $ — $ 150,412 Energy contracts 8,266,679 903,909 (587,545) 316,364 (23,427) 292,937 Foreign exchange contracts 62,154 59,632 — 59,632 — 59,632 Equity option contracts 8,107 60 — 60 — 60 Total customer risk management programs 11,004,117 1,114,013 (587,545) 526,468 (23,427) 503,041 Trading 20,340,860 96,506 (51,516) 44,990 (1,559) 43,431 Internal risk management programs 335,000 4,181 — 4,181 — 4,181 Total derivative contracts $ 31,679,977 $ 1,214,700 $ (639,061) $ 575,639 $ (24,986) $ 550,653 1 Notional amounts for commodity contracts are converted into dollar-equivalent amounts based on dollar prices at the inception of the contract. The following table summarizes the fair values of derivative contracts recorded as "derivative contracts" assets and liabilities in the balance sheet at December 31, 2022 (in thousands): Assets Notional 1 Gross Fair Value Netting Adjustments Net Fair Value Before Cash Collateral Cash Collateral Fair Value Net of Cash Collateral Customer risk management programs: Interest rate contracts $ 2,629,318 $ 158,825 $ — $ 158,825 $ (114,955) $ 43,870 Energy contracts 7,918,020 1,232,283 (594,543) 637,740 (67,024) 570,716 Foreign exchange contracts 219,791 216,569 — 216,569 — 216,569 Equity option contracts 21,102 193 — 193 (109) 84 Total customer risk management programs 10,788,231 1,607,870 (594,543) 1,013,327 (182,088) 831,239 Trading 17,400,037 126,910 (74,647) 52,263 (4,646) 47,617 Internal risk management programs 85,000 1,500 (13) 1,487 — 1,487 Total derivative contracts $ 28,273,268 $ 1,736,280 $ (669,203) $ 1,067,077 $ (186,734) $ 880,343 Liabilities Notional 1 Gross Fair Value Netting Adjustments Net Fair Value Before Cash Collateral Cash Collateral Fair Value Net of Cash Collateral Customer risk management programs: Interest rate contracts $ 2,629,122 $ 158,816 $ — $ 158,816 $ — $ 158,816 Energy contracts 8,696,060 1,242,058 (594,543) 647,515 (484,319) 163,196 Foreign exchange contracts 214,855 211,233 — 211,233 (7) 211,226 Equity option contracts 21,102 193 — 193 — 193 Total customer risk management programs 11,561,139 1,612,300 (594,543) 1,017,757 (484,326) 533,431 Trading 14,038,906 94,958 (74,647) 20,311 (423) 19,888 Internal risk management programs 178,806 1,594 (13) 1,581 — 1,581 Total derivative contracts $ 25,778,851 $ 1,708,852 $ (669,203) $ 1,039,649 $ (484,749) $ 554,900 1 Notional amounts for commodity contracts are converted into dollar-equivalent amounts based on dollar prices at the inception of the contract. The following summarizes the pre-tax net gains (losses) on derivative instruments and where they are recorded in the income statement (in thousands): Three Months Ended June 30, 2023 June 30, 2022 Brokerage Gain (Loss) on Derivatives, Net Brokerage Gain (Loss) on Derivatives, Net Customer risk management programs: Interest rate contracts $ 2,339 $ — $ 939 $ — Energy contracts 11,250 — 12,036 — Foreign exchange contracts 53 — 158 — Equity option contracts — — — — Total customer risk management programs 13,642 — 13,133 — Trading 1 64,172 — (15,376) — Internal risk management programs — (8,159) — (13,569) Total derivative contracts $ 77,814 $ (8,159) $ (2,243) $ (13,569) 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, 2023 June 30, 2022 Brokerage Gain (Loss) on Derivatives, Net Brokerage Gain (Loss) on Derivatives, Net Customer risk management programs: Interest rate contracts 4,109 — 7,281 — Energy contracts 17,803 — 16,484 — Foreign exchange contracts 84 — 306 — Equity option contracts — — — — Total customer risk management programs 21,996 — 24,071 — Trading 1 1,079 — 15,698 — Internal risk management programs — (9,503) — (60,550) Total derivative contracts $ 23,075 $ (9,503) $ 39,769 $ (60,550) 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, 2023
Loans and Leases Receivable, Net Amount [Abstract]
Loans [Text Block]	Loans Loans are either secured or unsecured based on the type of loan and the financial condition of the borrower. Repayment is generally expected from cash flow or proceeds from the sale of selected assets of the borrower. BOK Financial is exposed to risk of loss on loans due to the borrower's difficulties, which may arise from any number of factors, including problems within the respective industry or local economic conditions. Access to collateral, in the event of borrower default, is reasonably assured through adherence to applicable lending laws and through sound lending standards and credit review procedures. Accounting policies for all loans, excluding residential mortgage loans guaranteed by U.S. government agencies, are as follows. Interest is accrued at the applicable interest rate on the principal amount outstanding. Loans are placed on nonaccruing status when, in the opinion of management, full collection of principal or interest is uncertain. Internally risk graded loans are individually evaluated for nonaccruing status quarterly. Non-risk graded loans are generally placed on nonaccruing status when more than 90 days past due or within 60 days of being notified of the borrower's bankruptcy filing. Interest previously accrued but not collected is charged against interest income when the loan is placed on nonaccruing status. Accrued but not paid interest receivable is included in Receivables in the Consolidated Balance Sheets. Payments on nonaccruing loans are applied to principal or recognized as interest income, according to management's judgment as to the collectability of principal. Loans may be returned to accruing status when, in the opinion of management, full collection of principal and interest, including principal previously charged off, is probable based on improvements in the borrower's financial condition or a sustained period of performance. For loans acquired with no evidence of credit deterioration, discounts are accreted on either an individual basis for loans with unique characteristics or on a pool basis for groups of homogeneous loans. Accretion is discontinued when a loan with an individually attributed discount is placed on nonaccruing status. Modifications of loans to existing borrowers generally consist of interest rate reductions, extension of payment terms, or a combination of these. Modifications may arise either voluntarily through negotiations with the borrower or involuntarily through court order. Payment deferrals up to six months are generally considered to be short-term modifications. Generally, principal and accrued but unpaid interest is not voluntarily forgiven. A change to the allowance for credit losses is generally not recorded upon modification because the effect of most modifications made to borrowers experiencing financial difficulty is already included in the allowance methodology. Performing loans may be renewed under the current collateral value, debt service ratio and other underwriting standards. Nonaccruing loans may be renewed and will remain classified as nonaccruing. Occasionally, loans, other than residential mortgage loans, may be held for sale in order to manage credit concentration. These loans are carried at the lower of cost or fair value with gains or losses recognized in Other gains (losses), net in the Consolidated Statements of Earnings. All loans are charged off when the loan balance or a portion of the loan balance is no longer supported by the paying capacity of the borrower or when the required cash flow is reduced in a modification. The charge-off amount is determined through a quarterly evaluation of available cash resources and collateral values. Internally risk graded loans are evaluated quarterly, and charge-offs are taken in the quarter in which the loss is identified. Non-risk graded loans that are past due between 60 days and 180 days, based on the loan product type, are charged off. Loans to borrowers whose personal obligation has been discharged through Chapter 7 bankruptcy proceedings are charged off within 60 days of notice of the bankruptcy filing, regardless of payment status. Loan origination and commitment fees and direct loan acquisition and origination costs are deferred and amortized as an adjustment to yield over the life of the loan or over the commitment period, as applicable. Amortization does not anticipate loan prepayments. Net unamortized fees are recognized in full at time of payoff. Qualifying residential mortgage loans guaranteed by U.S. government agencies have been sold into GNMA pools. Under certain performance conditions specified in government programs, the Company may have the right, but not the obligation to repurchase loans from GNMA pools. These loans no longer qualify for sale accounting and are recognized in the Consolidated Balance Sheets. We do not expect to receive all principal and interest based on the loan's contractual terms. A portion of the principal balance continues to be guaranteed; however, interest accrues at a curtailed rate as specified in the programs. The carrying value of these loans is reduced based on an estimate of the expected cash flows discounted at the original note rate plus a liquidity spread. Guaranteed loans may be modified in accordance with U.S. government agency guidelines. Interest continues to accrue based on the modified rate. Guaranteed loans may either be resold into GNMA pools after a performance period specified by the programs or foreclosed and conveyed to the guarantors. Loans are disaggregated into portfolio segments and further disaggregated into classes. The portfolio segment is the level at which the Company develops and documents a systematic method for determining its allowance for credit losses. Classes are a further disaggregation of portfolio segments based on the risk characteristics of the loans and the Company's method for monitoring and assessing credit risk. Portfolio segments of the loan portfolio are as follows (in thousands): June 30, 2023 December 31, 2022 Fixed Variable Non-accrual Total Fixed Variable Non-accrual Total Commercial $ 3,492,786 $ 10,968,453 $ 73,277 $ 14,534,516 $ 3,392,422 $ 10,759,780 $ 60,297 $ 14,212,499 Commercial real estate 878,947 4,074,459 17,395 4,970,801 874,716 3,715,491 16,570 4,606,777 Loans to individuals 2,133,208 1,557,555 41,579 3,732,342 2,099,165 1,593,779 44,930 3,737,874 Total $ 6,504,941 $ 16,600,467 $ 132,251 $ 23,237,659 $ 6,366,303 $ 16,069,050 $ 121,797 $ 22,557,150 Credit Commitments Commitments to extend credit are agreements to lend to a customer as long as there is no violation of conditions established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. At June 30, 2023, outstanding commitments totaled $15.0 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, 2023, outstanding standby letters of credit totaled $722 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 on-going evaluation of the estimated expected credit losses in the portfolio and on unused commitments to provide financing. A well-documented methodology has been developed and is applied by an independent Credit Administration department to assure consistency across the Company. The allowance for loan losses consists of specific allowances attributed to certain individual loans, generally nonaccruing loans, with dissimilar risk characteristics that have not yet been charged down to amounts we expect to recover and general allowances for estimated credit losses on pools of loans that share similar risk characteristics. When full collection of principal or interest is uncertain, the loan's risk characteristics have changed, and we exclude the loan from the general allowance pool, typically designating it as nonaccruing. For these loans, a specific allowance reflects the expected credit loss. We measure specific allowances for loans excluded from the general allowance pool by an evaluation of estimated future cash flows discounted at the loan's initial effective interest rate or the fair value of collateral for certain collateral dependent loans. For a non-collateral dependent loan, the specific allowance is the amount by which the loan's amortized cost basis exceeds its net realizable value. We measure the specific allowance for collateral dependent loans as the amount by which the loan's amortized cost basis exceeds its fair value. When repayment is expected to be provided substantially through the sale of collateral, we deduct estimated selling costs from the collateral's fair value. Generally, for real property held as collateral for loans, third party appraisals that conform to Uniform Standards of Professional Appraisal Practice serve as the basis for the fair value of real property held as collateral. These appraised values are on an "as-is" basis and generally are not adjusted by the Company. We obtain updated appraisals at least annually or more frequently if market conditions indicate collateral values may have declined. For energy loans, our internal staff of engineers generally determines collateral value of mineral rights based on projected cash flows from proven oil and gas reserves under existing economic and operating conditions. For real property held as collateral for other loans, third party appraisals that conform to Uniform Standards of Professional Appraisal Practice generally serve as the basis for the fair value. These appraised values are on an "as-is" basis and generally are not adjusted by the Company. We obtain updated appraisals at least annually or more frequently if market conditions indicate collateral values may have declined. Our special assets staff generally determines the value of other collateral based on projected liquidation cash flows under current market conditions. We evaluate collateral values and available cash resources quarterly. Historical statistics may be used to estimate specific allowances in limited situations, such as when a collateral dependent loan is removed from the general allowance pool near the end of a reporting period until an appraisal of collateral value is received or a full assessment of future cash flows is completed. General allowances estimate expected credit losses on pools of loans sharing similar risk characteristics that are expected to occur over the loan's estimated remaining life. The loan's estimated remaining life represents the contractual term adjusted for amortization, estimates of prepayments, and borrower-owned extension options. Approximately 90 percent of the committed dollars in the loan portfolio is risk graded loans with general allowance model inputs that include probability of default, loss given default, and exposure at default. Probability of default is based on the migration of loans from performing to nonperforming using historical life of loan analysis periods. Loss given default is based on the aggregate losses incurred, net of estimated recoveries. Exposure at default represents an estimate of the outstanding amount of credit exposure at the time a default may occur. Charge-off migration is used to calculate the general allowance for the majority of non-risk graded loans to individuals. The expected credit loss on less than 10 percent of the committed dollars in the portfolio is calculated using charge-off migration. The expected credit loss on approximately 1 percent of the committed dollars in the portfolio is calculated using a non-modeled approach. Specifically, the calculation applies a long-term net charge-off rate to the loan balances, adjusted for the weighted average remaining maturity of each portfolio. In estimating the expected credit losses for general allowances on performing risk-graded loans, each portfolio class is assigned relevant economic loss drivers which best explain variations in portfolio net loss rates. The probability of default estimates for each portfolio class are adjusted for current and forecasted economic conditions. The result is applied to the exposure at default and loss given default to calculate the lifetime expected credit loss estimate. Selection of relevant economic loss drivers is re-evaluated periodically and involves statistical analysis as well as management judgment. The unemployment rate factors significantly in the allowance for loan losses calculation, affecting commercial and loans to individuals segments. Other primary factors impacting the commercial portfolio include BBB corporate spreads, real gross domestic product growth rate, and energy commodity prices. The primary commercial real estate variables are vacancy rate and BBB corporate spreads. In addition to the unemployment rate, the forecast for loans to individuals is tied to a home price index. The forecasts may include regional economic factors when localized conditions diverge from national conditions. An Economic Forecast Committee, consisting of senior management with members largely independent of the allowance process develops a twelve-month forward-looking forecast for the relevant economic loss drivers. Management develops these forecasts based on external data as well as a view of future economic conditions which may include adjustments for regional conditions. The forecast includes three economic scenarios and probability weights for each scenario. The base forecast represents management's view of the most likely outcome, while the downside forecast reflects reasonably possible worsening economic conditions, and the upside forecast projects reasonably possible improving conditions. At the end of the one-year reasonable and supportable forecast period, we transition from shorter-term expected losses to long-term loss averages for the loan's estimated remaining life. The difference between short-term loss forecasts and long-term loss averages is run-off over the reversion horizon, up to three years, depending on the forecasted economic scenarios. General allowances also consider the estimated impact of factors that are not captured in the modeled results or historical experience. These factors may increase or decrease modeled results by amounts determined by the Allowance Committee. Factors not captured in modeled results or historical experience may include for example, new lines of business, market conditions that have not been previously encountered, observed changes in credit risk that are not yet reflected in macro-economic factors, or economic conditions that impact loss given default assumptions. The accrual for off-balance sheet credit risk is maintained at a level that is appropriate to cover estimated losses associated with credit instruments that are not currently recognized as assets such as loan commitments, standby letters of credit or guarantees that are not unconditionally cancelable by the bank. This accrual is included in other liabilities in the Consolidated Balance Sheets. The appropriateness of the accrual is determined in the same manner as the allowance for loan losses, with the added consideration of commitment usage over the remaining life for those loans that the bank can not unconditionally cancel. A provision for credit losses is charged against or credited to earnings in amounts necessary to maintain an appropriate Allowance for Credit Losses. Recoveries of loans previously charged off are added to the allowance when received. The activity in the allowance for loan losses and the allowance for off-balance sheet credit losses related to loan commitments and standby letters of credit is summarized as follows (in thousands): Three Months Ended 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 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 losses 2,048 (2,809) (218) (979) Ending balance $ 20,294 $ 37,681 $ 1,965 $ 59,940 Three Months Ended June 30, 2022 Commercial Commercial Real Estate Loans to Individuals Total Allowance for loan losses: Beginning balance $ 151,448 $ 58,974 $ 36,051 $ 246,473 Provision for loan losses (15,468) 4,085 5,225 (6,158) Loans charged off (6) (78) (1,284) (1,368) Recoveries of loans previously charged off 1,588 16 563 2,167 Ending balance $ 137,562 $ 62,997 $ 40,555 $ 241,114 Allowance for off-balance sheet credit risk from unfunded loan commitments: Beginning balance $ 13,966 $ 20,465 $ 1,814 $ 36,245 Provision for off-balance sheet credit risk 1,873 4,205 (73) 6,005 Ending balance $ 15,839 $ 24,670 $ 1,741 $ 42,250 Six Months Ended June 30, 2022 Commercial Commercial Real Estate Loans to Individuals Total Allowance for loan losses: Beginning balance $ 162,056 $ 58,553 $ 35,812 $ 256,421 Provision for loan losses (20,586) 4,553 5,908 (10,125) Loans charged off (6,087) (269) (2,817) (9,173) Recoveries of loans previously charged off 2,179 160 1,652 3,991 Ending balance $ 137,562 $ 62,997 $ 40,555 $ 241,114 Allowance for off-balance sheet credit risk from unfunded loan commitments: Beginning balance $ 13,812 $ 17,442 $ 1,723 $ 32,977 Provision for off-balance sheet credit risk 2,027 7,228 18 9,273 Ending balance $ 15,839 $ 24,670 $ 1,741 $ 42,250 A $17.0 million provision for credit losses was necessary for the second quarter of 2023, primarily related to higher assumed commercial real estate vacancy rates during the forecast period and overall loan portfolio growth during the quarter. The allowance for loan losses and recorded investment of the related loans by portfolio segment for each measurement method at June 30, 2023 is as follows (in thousands): Collectively Measured Individually Measured Total Recorded Investment Related Allowance Recorded Investment Related Allowance Recorded Investment Related Commercial $ 14,461,239 $ 135,453 $ 73,277 $ 7,816 $ 14,534,516 $ 143,269 Commercial real estate 4,953,406 74,797 17,395 1,550 4,970,801 76,347 Loans to individuals 3,690,763 43,098 41,579 — 3,732,342 43,098 Total $ 23,105,408 $ 253,348 $ 132,251 $ 9,366 $ 23,237,659 $ 262,714 The allowance for loan losses and recorded investment of the related loans by portfolio segment for each measurement method at December 31, 2022 is as follows (in thousands): Collectively Measured Individually Measured Total Recorded Investment Related Allowance Recorded Investment Related Allowance Recorded Investment Related Commercial $ 14,152,202 $ 127,566 $ 60,297 $ 4,020 $ 14,212,499 $ 131,586 Commercial real estate 4,590,207 56,098 16,570 1,550 4,606,777 57,648 Loans to individuals 3,692,944 46,470 44,930 — 3,737,874 46,470 Total $ 22,435,353 $ 230,134 $ 121,797 $ 5,570 $ 22,557,150 $ 235,704 Credit Quality Indicators The Company utilizes risk grading as primary credit quality indicators as it influences the probability of default which is a key attribute in the expected credit losses calculation. Substantially all commercial as well as commercial real estate loans and certain loans to individuals are risk graded based on a quarterly evaluation of the borrowers' ability to repay the loans. Certain commercial loans and most loans to individuals are small, homogeneous pools that are not risk-graded. The credit quality of these loans is based on past due days in accordance with regulatory guidelines. We have included in the credit quality indicator "pass" loans that are in compliance with the original terms of the agreement and currently exhibit no factors that cause management to have doubts about the borrowers' ability to remain in compliance with the original terms of the agreement, which is consistent with the regulatory guideline of "pass". This also includes past due residential mortgages that are guaranteed by agencies of the U.S. government that continue to accrue interest based on criteria of the guarantors' programs. Other loans especially mentioned ("Special Mention") are currently performing in compliance with the original terms of the agreement but may have a potential weakness that deserves management's close attention, consistent with regulatory guidelines. Non-graded loans 30 to 59 days past due are categorized as Special Mention. The risk grading process identifies certain loans that have a well-defined weakness (for example, inadequate debt service coverage or liquidity or marginal capitalization; repayment may depend on collateral or other risk mitigation) that may jeopardize liquidation of the debt and represent a greater risk due to deterioration in the financial condition of the borrower. This is consistent with the regulatory guideline for "substandard". Because the borrowers are still performing in accordance with the original terms of the loan agreements, these loans remain on accruing status. Non-graded loans 60 to 89 days past due are categorized as Accruing Substandard. Nonaccruing loans represent loans for which full collection of principal and interest is uncertain. This includes certain loans considered "substandard" and all loans considered "doubtful" by regulatory guidelines. Non-graded loans 90 or more days past due are categorized as Nonaccrual. Probability of default is lowest for pass graded loans and increases for each credit quality indicator, Special Mention, and Accruing Substandard. Vintage represents the year of origination, except for revolving loans which are considered in aggregate. Loans that were once revolving but have converted to term loans without additional underwriting appear in a separate vintage column. The following table summarizes the Company’s loan portfolio at June 30, 2023 by the risk grade categories and vintage (in thousands): Origination Year 2023 2022 2021 2020 2019 Prior Revolving Loans Revolving Loans Converted to Term Loans Total Commercial: Energy Pass $ 120,233 $ 99,929 $ 50,910 $ 8,713 $ 10,528 $ 10,884 $ 3,185,817 $ — $ 3,487,014 Accruing Substandard — — — — 651 1,050 — — 1,701 Nonaccrual — — — — — 117 19,920 — 20,037 Total energy 120,233 99,929 50,910 8,713 11,179 12,051 3,205,737 — 3,508,752 Loans charged-off, year-to-date — — — — — — — — — Healthcare Pass 357,976 857,991 584,067 465,489 367,300 958,933 275,267 17 3,867,040 Special Mention — — 18,722 6,986 14,025 32,123 980 — 72,836 Accruing Substandard — 540 — — — 12,518 1,700 — 14,758 Nonaccrual — — — — 25,967 10,786 — — 36,753 Total healthcare 357,976 858,531 602,789 472,475 407,292 1,014,360 277,947 17 3,991,387 Loans charged-off, year-to-date — — — — — — — — — Services Pass 378,254 681,854 461,897 262,276 158,543 759,638 820,662 607 3,523,731 Special Mention — 18,244 252 180 623 2,171 3,963 — 25,433 Accruing Substandard — 629 836 1,756 2,556 3,372 22,259 56 31,464 Nonaccrual — — 4,137 404 — — — — 4,541 Total services 378,254 700,727 467,122 264,616 161,722 765,181 846,884 663 3,585,169 Loans charged-off, year-to-date — — 882 — — — 1,899 — 2,781 General business Pass 443,873 624,377 292,674 158,127 158,780 339,584 1,327,452 2,352 3,347,219 Special Mention 898 3,461 7,449 44 114 1,485 15,563 — 29,014 Accruing Substandard — 41,341 2,931 46 — 6,072 10,629 10 61,029 Nonaccrual — — — — 14 60 11,843 29 11,946 Total general business 444,771 669,179 303,054 158,217 158,908 347,201 1,365,487 2,391 3,449,208 Loans charged-off, year-to-date — — — 2 — 12 4 10 28 Total commercial 1,301,234 2,328,366 1,423,875 904,021 739,101 2,138,793 5,696,055 3,071 14,534,516 Commercial real estate: Pass 281,559 1,541,831 1,173,425 491,657 543,242 790,115 117,939 — 4,939,768 Special Mention — — — — — 13,638 — — 13,638 Nonaccrual — — — — 7,343 10,052 — — 17,395 Total commercial real estate 281,559 1,541,831 1,173,425 491,657 550,585 813,805 117,939 — 4,970,801 Loans charged-off, year-to-date — — — — — 6,208 — — 6,208 Origination Year 2023 2022 2021 2020 2019 Prior Revolving Loans Revolving Loans Converted to Term Loans Total Loans to individuals: Residential mortgage Pass 190,406 339,049 359,330 363,831 59,080 267,776 356,384 22,218 1,958,074 Special Mention — 246 — 1,347 — 355 3,388 — 5,336 Accruing Substandard — — — — — 54 253 — 307 Nonaccrual — 1,147 2,280 2,828 729 20,042 2,228 719 29,973 Total residential mortgage 190,406 340,442 361,610 368,006 59,809 288,227 362,253 22,937 1,993,690 Loans charged-off, year-to-date — — 7 — — 4 1 — 12 Residential mortgage guaranteed by U.S. government agencies Pass — 1,184 2,089 5,872 7,690 157,862 — — 174,697 Nonaccrual — — — 299 641 10,533 — — 11,473 Total residential mortgage guaranteed by U.S. government agencies — 1,184 2,089 6,171 8,331 168,395 — — 186,170 Personal: Pass 83,233 230,418 175,862 151,387 130,574 199,122 575,095 249 1,545,940 Special Mention — 47 82 49 7 3 6,056 — 6,244 Accruing Substandard — — — — 160 — 5 — 165 Nonaccrual — 36 5 45 5 14 28 — 133 Total personal 83,233 230,501 175,949 151,481 130,746 199,139 581,184 249 1,552,482 Loans charged-off, year-to-date — 43 40 16 — 2,584 4 1 2,688 Total loans to individuals 273,639 572,127 539,648 525,658 198,886 655,761 943,437 23,186 3,732,342 Total loans $ 1,856,432 $ 4,442,324 $ 3,136,948 $ 1,921,336 $ 1,488,572 $ 3,608,359 $ 6,757,431 $ 26,257 $ 23,237,659 The following table summarizes the Company's loan portfolio at December 31, 2022 by the risk grade categories and vintage (in thousands): Origination Year 2022 2021 2020 2019 2018 Prior Revolving Loans Revolving Loans Converted to Term Loans Total Commercial: Energy Pass $ 157,745 $ 76,951 $ 30,284 $ 12,783 $ 5,992 $ 4,980 $ 3,104,906 $ — $ 3,393,641 Accruing Substandard — — — 664 385 683 28,018 — 29,750 Nonaccrual — — — — — 159 1,240 — 1,399 Total energy 157,745 76,951 30,284 13,447 6,377 5,822 3,134,164 — 3,424,790 Healthcare Pass 932,097 604,886 476,854 404,204 464,989 618,163 245,898 20 3,747,111 Special Mention — — — 20,071 — 18,859 4 — 38,934 Accruing Substandard — — — — — 14,304 3,634 — 17,938 Nonaccrual — — — 26,480 6,373 8,181 — — 41,034 Total healthcare 932,097 604,886 476,854 450,755 471,362 659,507 249,536 20 3,845,017 Services Pass 821,785 496,510 286,085 193,481 156,736 696,300 722,371 639 3,373,907 Special Mention 502 5,139 989 771 894 1,345 8,668 — 18,308 Accruing Substandard — — — 2,459 43 2,789 17,665 122 23,078 Nonaccrual — 5,570 449 — — 2,389 7,820 — 16,228 Total services 822,287 507,219 287,523 196,711 157,673 702,823 756,524 761 3,431,521 General business Pass 725,894 361,839 198,274 172,878 139,140 283,694 1,570,536 2,329 3,454,584 Special Mention 17,759 13,065 208 71 7 2,291 7,094 26 40,521 Accruing Substandard — 2,169 66 4,130 4,680 3,287 94 4 14,430 Nonaccrual — — 1,052 14 72 5 485 8 1,636 Total general business 743,653 377,073 199,600 177,093 143,899 289,277 1,578,209 2,367 3,511,171 Total commercial 2,655,782 1,566,129 994,261 838,006 779,311 1,657,429 5,718,433 3,148 14,212,499 Commercial real estate: Pass 1,188,483 1,158,002 552,616 641,102 247,625 633,304 161,616 — 4,582,748 Accruing Substandard — — — 7,459 — — — — 7,459 Nonaccrual — — — — — 16,570 — — 16,570 Total commercial real estate 1,188,483 1,158,002 552,616 648,561 247,625 649,874 161,616 — 4,606,777 Origination Year 2022 2021 2020 2019 2018 Prior Revolving Loans Revolving Loans Converted to Term Loans Total Loans to individuals: Residential mortgage Pass 354,497 373,190 393,002 63,142 40,525 260,625 352,126 22,176 1,859,283 Special Mention — 81 42 — 142 388 527 87 1,267 Accruing Substandard — — 187 — — 138 117 1 443 Nonaccrual 32 1,656 2,717 362 1,904 20,139 2,216 765 29,791 Total residential mortgage 354,529 374,927 395,948 63,504 42,571 281,290 354,986 23,029 1,890,784 Residential mortgage guaranteed by U.S. government agencies Pass 289 2,254 9,000 10,722 17,244 191,426 — — 230,935 Nonaccrual — — 299 1,460 2,319 10,927 — — 15,005 Total residential mortgage guaranteed by U.S. government agencies 289 2,254 9,299 12,182 19,563 202,353 — — 245,940 Personal: Pass 254,497 193,095 154,887 172,114 68,871 201,278 549,187 332 1,594,261 Special Mention 47 28 40 12 17 — 6,003 4 6,151 Accruing Substandard — 444 — 160 — — — — 604 Nonaccrual 38 7 12 22 14 18 23 — 134 Total personal 254,582 193,574 154,939 172,308 68,902 201,296 555,213 336 1,601,150 Total loans to individuals 609,400 570,755 560,186 247,994 131,036 684,939 910,199 23,365 3,737,874 Total loans $ 4,453,665 $ 3,294,886 $ 2,107,063 $ 1,734,561 $ 1,157,972 $ 2,992,242 $ 6,790,248 $ 26,513 $ 22,557,150 Nonaccruing Loans A summary of nonaccruing loans at June 30, 2023 follows (in thousands): As of June 30, 2023 Total With No With Allowance Related Allowance Commercial: Energy $ 20,037 $ 20,037 $ — $ — Healthcare 36,753 36,753 — — Services 4,541 404 4,137 3,218 General business 11,946 7,348 4,598 4,598 Total commercial 73,277 64,542 8,735 7,816 Commercial real estate 17,395 7,504 9,891 1,550 Loans to individuals: Residential mortgage 29,973 29,973 — — Residential mortgage guaranteed by U.S. government agencies 11,473 11,473 — — Personal 133 133 — — Total loans to individuals 41,579 41,579 — — Total $ 132,251 $ 113,625 $ 18,626 $ 9,366 A summary of nonaccruing loans at December 31, 2022 follows (in thousands): As of December 31, 2022 Total With No With Allowance Related Allowance Commercial: Energy $ 1,399 $ 1,399 $ — $ — Healthcare 41,034 34,661 6,373 946 Services 16,228 7,835 8,393 3,074 General business 1,636 1,636 — — Total commercial 60,297 45,531 14,766 4,020 Commercial real estate 16,570 393 16,177 1,550 Loans to individuals: Residential mortgage 29,791 29,791 — — Residential mortgage guaranteed by U.S. government agencies 15,005 15,005 — — Personal 134 134 — — Total loans to individuals 44,930 44,930 — — Total $ 121,797 $ 90,854 $ 30,943 $ 5,570 Loan Modifications to Borrowers Experiencing Financial Difficulty At June 30, 2023 the Company had $57.6 million of loan modifications to borrowers experiencing financial difficulty, including $36.9 million of healthcare loans, $10.7 million of residential mortgage loans guaranteed by U.S. government agencies and $9.5 million of general business loans. Modifications generally consist of interest rate reductions, an other than insignificant payment delay, term extension or a combination. During the six months ended June 30, 2023, $4.4 million of residential mortgage loans were modified and subsequently defaulted with $4.3 million of these defaulted loans being guaranteed by U.S. government agencies. A payment

Mortgage Banking Activities

Mortgage Banking Activities	6 Months Ended
	Jun. 30, 2023
Mortgage Banking [Abstract]
Mortgage Banking Activities [Text Block]	Mortgage Banking Activities Residential Mortgage Loan Production The Company originates, markets and services conventional and government-sponsored residential mortgage loans. Generally, conforming fixed rate residential mortgage loans are held for sale in the secondary market, and non-conforming and adjustable-rate residential mortgage loans are retained for investment. Residential mortgage loans originated for sale by the Company are carried at fair value based on sales commitments and market quotes. Changes in the fair value of mortgage loans held for sale are included in Other operating revenue – Mortgage banking revenue. Residential mortgage loans held for sale also includes the fair value of residential mortgage loan commitments and forward sales commitments, which are considered derivative contracts that have not been designated as hedging instruments for accounting purposes. The volume of mortgage loans originated for sale and secondary market prices are the primary drivers of originating and marketing revenue. Residential mortgage loan commitments are generally outstanding for 60 to 90 days, which represents the typical period from commitment to originate a residential mortgage loan to when the closed loan is sold to an investor. Residential mortgage loan commitments are subject to both credit and interest rate risk. Credit risk is managed through underwriting policies and procedures, including collateral requirements, which are generally accepted by the secondary loan markets. Exposure to interest rate fluctuations is partially managed through forward sales of residential mortgage-backed securities and forward sales contracts. These latter contracts set the price for loans that will be delivered in the next 60 to 90 days. The unpaid principal balance of residential mortgage loans held for sale, notional amounts of derivative contracts related to residential mortgage loan commitments and forward contract sales and their related fair values included in Mortgage loans held for sale on the Consolidated Balance Sheets were (in thousands): June 30, 2023 December 31, 2022 Unpaid Principal Balance/ Fair Value Unpaid Principal Balance/ Fair Value Residential mortgage loans held for sale $ 93,379 $ 92,250 $ 74,941 $ 73,938 Residential mortgage loan commitments 55,031 1,829 45,492 1,054 Forward sales contracts 124,228 741 109,469 280 $ 94,820 $ 75,272 No residential mortgage loans held for sale were 90 days or more past due or considered impaired as of June 30, 2023 or December 31, 2022. No credit losses were recognized on residential mortgage loans held for sale for the six month period ended June 30, 2023 and 2022. Mortgage banking revenue was as follows (in thousands): Three Months Ended Six Months Ended 2023 2022 2023 2022 Production revenue: Net realized gains (losses) on sale of mortgage loans $ (296) $ 3,158 $ (2,027) $ 10,041 Net change in unrealized gain (loss) on mortgage loans held for sale (496) 2,307 (126) (3,520) Net change in the fair value of mortgage loan commitments (865) 998 775 (2,300) Net change in the fair value of forward sales contracts 1,373 (6,967) 461 330 Total production revenue (284) (504) (917) 4,551 Servicing revenue 15,425 11,872 30,425 23,467 Total mortgage banking revenue $ 15,141 $ 11,368 $ 29,508 $ 28,018 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, 2023 December 31, 2022 Number of residential mortgage loans serviced for others 116,980 110,541 Outstanding principal balance of residential mortgage loans serviced for others $ 20,693,294 $ 18,863,201 Weighted average interest rate 3.58 % 3.59 % Remaining term (in months) 283 283 The following represents activity in capitalized mortgage servicing rights (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 Beginning Balance $ 299,803 $ 209,563 $ 277,608 $ 163,198 Additions 4,103 5,754 6,603 10,969 Acquisitions — 44,867 31,138 44,867 Change in fair value due to principal payments (8,445) (7,357) (13,829) (15,317) Change in fair value due to market assumption changes 9,261 17,485 3,202 66,595 Ending Balance $ 304,722 $ 270,312 $ 304,722 $ 270,312 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, 2023 December 31, 2022 Discount rate – risk-free rate plus a market premium 9.44% 9.51% Prepayment rate - based upon loan interest rate, original term and loan type 7.27% 7.54% Loan servicing costs – annually per loan based upon loan type: Performing loans $69 - $94 $69 - $94 Delinquent loans $150 - $500 $150 - $500 Loans in foreclosure $875 - $8,000 $875 - $8,000 Escrow earnings rate – indexed to rates paid on deposit accounts with comparable average life 4.18% 4.06% Primary/secondary mortgage rate spread 105 bps 105 bps Delinquency rate 1.91% 2.33% Changes in primary residential mortgage interest rates directly affect the prepayment speeds used in valuing our mortgage servicing rights. A separate third party model is used to estimate prepayment speeds based on interest rates, housing turnover rates, estimated loan curtailment, anticipated defaults and other relevant factors. The prepayment model is updated periodically for changes in market conditions and adjusted to better correlate with actual performance of BOK Financial's servicing portfolio.

Commitments and Contingent Liab

Commitments and Contingent Liabilities	6 Months Ended
	Jun. 30, 2023
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingent Liabilities [Text Block]	Commitments and Contingent Liabilities Litigation Contingencies On June 24, 2015, BOKF, NA received a complaint that an employee had colluded with a bond issuer and an individual in misusing revenues pledged to municipal bonds for which BOKF, NA served as trustee under the bond indenture. The Company conducted an investigation and concluded that employees in one of its Corporate Trust offices had, with respect to a single group of affiliated bond issuances, violated Company policies and procedures. The relationship manager was terminated. The Company reported the circumstances to, and cooperated with an investigation by, the Securities and Exchange Commission ("SEC"). On September 7, 2016, BOKF, NA agreed to, and the SEC entered, a consent order finding that BOKF, NA had violated Section 17(a) of the Securities Act of 1933 and Section 10(b) of the Securities Exchange Act and required BOKF, NA to disgorge $1,067,721 of fees and pay a civil penalty of $600,000. BOKF, NA disgorged the fees and paid the penalty. On August 26, 2016, BOKF, NA was sued in the United States District Court for New Jersey by two bondholders in a putative class action alleging BOKF, NA participated in the fraudulent sale of securities by the principals. While the action remains stayed with no current deadlines pending, plaintiffs recently informed the Court of their intent to request the stay be lifted in a joint status report. BOKF, NA plans to oppose the request to lift the stay. On September 14, 2016, BOKF, NA was sued in the District Court of Tulsa County, Oklahoma by 19 bondholders also alleging BOKF, NA participated in the fraudulent sale of securities by the principals. On April 18, 2023 seven plaintiffs dismissed their claims without prejudice. Discovery on the remaining plaintiff's claims is ongoing. Management is advised by counsel that, in the Tulsa County District Court action, a loss is not probable and that the loss, if any, cannot be reasonably estimated. On December 28, 2015, in an action brought by the SEC, the New Jersey District Court entered a judgment against the principals involved in issuing the bonds. On January 8, 2020, the Court entered judgment against the principal individual and his wife for $36,805,051 in principal amount and $10,937,831 in pre-judgment interest. The SEC continues to aggressively pursue collection of the judgment. If the individual principal and his wife cannot pay the bonds, a bondholder loss could become probable. Management has been advised by counsel that BOKF, NA has valid defenses to claims of bondholders and that no loss to the Company is probable. No provision for losses has been made at this time. BOKF, NA estimates that, upon sale of all remaining collateral securing payment of the bonds, approximately $25 million in principal will remain outstanding. A reasonable estimate cannot be made of the amount of any bondholder loss, though the amount of bondholder loss could be material to the Company in the event a loss to the Company becomes probable. In the ordinary course of business, BOK Financial and its subsidiaries are subject to legal actions and complaints. Management believes, based upon the opinion of counsel, that the actions and liability or loss, if any, resulting from the final outcomes of the proceedings, will not have a material effect on the Company's financial condition, results of operations or cash flows. Alternative Investment Commitments The Company invests in several tax credit entities and other funds as permitted by banking regulations. Consolidation of these investments is based on the variable interest model. At June 30, 2023, the Company has $417 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 $101 million of unfunded commitments included in Other liabilities on the Consolidated Balance Sheets.

Shareholders' Equity

Shareholders' Equity	6 Months Ended
	Jun. 30, 2023
Stockholders' Equity Note [Abstract]
Shareholders' Equity [Text Block]	Shareholders' Equity On August 1, 2023, the Company declared a quarterly cash dividend of $0.54 per common share payable on or about August 30, 2023 to shareholders of record as of August 15, 2023. Dividends declared were $0.54 and $1.08 per share during the three and six months ended June 30, 2023 and $0.53 and $1.06 per share during the three and six months ended June 30, 2022. Accumulated Other Comprehensive Income (Loss) AOCI includes unrealized gains and losses on available for sale ("AFS") securities. AOCI also includes unrealized losses on AFS securities that were transferred from AFS to investment securities in the second quarter of 2022. Such amounts are being amortized over the estimated remaining life of the security as an adjustment to yield, offsetting the related amortization of premium on the transferred securities. Gains and losses in AOCI are net of deferred income taxes. A rollforward of the components of accumulated other comprehensive income (loss) is included as follows (in thousands): Unrealized Gain (Loss) on Available for Sale Securities Investment Securities Transferred from AFS Employee Benefit Plans Total Balance, Dec. 31, 2021 $ 69,775 $ — $ 2,596 $ 72,371 Net change in unrealized gain (loss) (881,577) — — (881,577) Transfer of net unrealized loss from AFS to investment securities 267,509 (267,509) — — Reclassification adjustments included in earnings: Interest revenue, Investment securities — 2,455 — 2,455 Gain on available for sale securities, net (2,125) — — (2,125) Other comprehensive loss, before income taxes (616,193) (265,054) — (881,247) Federal and state income taxes (144,215) (62,033) — (206,248) Other comprehensive loss, net of income taxes (471,978) (203,021) — (674,999) Balance, June 30, 2022 $ (402,203) $ (203,021) $ 2,596 $ (602,628) 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)

Earnings Per Share

Earnings Per Share	6 Months Ended
	Jun. 30, 2023
Earnings Per Share [Abstract]
Earnings Per Share [Text Block]	Earnings Per Share (In thousands, except share and per share amounts) Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 Numerator: Net income attributable to BOK Financial Corp. shareholders $ 151,308 $ 132,846 $ 313,676 $ 195,334 Less: Earnings allocated to participating securities 1,202 949 2,457 1,400 Numerator for basic earnings per share – income available to common shareholders 150,106 131,897 311,219 193,934 Effect of reallocating undistributed earnings of participating securities — — — — Numerator for diluted earnings per share – income available to common shareholders $ 150,106 $ 131,897 $ 311,219 $ 193,934 Denominator: Weighted average shares outstanding 66,521,728 67,938,607 66,684,603 68,105,679 Less: Participating securities included in weighted average shares outstanding 527,596 484,859 522,555 489,283 Denominator for basic earnings per common share 65,994,132 67,453,748 66,162,048 67,616,396 Dilutive effect of employee stock compensation plans — 1,424 — 1,438 Denominator for diluted earnings per common share 65,994,132 67,455,172 66,162,048 67,617,834 Basic earnings per share $ 2.27 $ 1.96 $ 4.70 $ 2.87 Diluted earnings per share $ 2.27 $ 1.96 $ 4.70 $ 2.87

Reportable Segments

Reportable Segments	6 Months Ended
	Jun. 30, 2023
Segment Reporting [Abstract]
Reportable Segments [Text Block]	Reportable Segments 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 revenue from external sources $ 299,712 $ 17,828 $ 4,415 $ 306 $ 322,261 Net interest revenue (expense) from internal sources (39,613) 95,563 44,937 (100,887) — Net interest revenue (expense) 260,099 113,391 49,352 (100,581) 322,261 Net loans charged off and provision for credit losses 6,000 1,129 (45) 9,916 17,000 Net interest revenue after provision for credit losses 254,099 112,262 49,397 (110,497) 305,261 Other operating revenue 68,828 32,277 123,043 (15,099) 209,049 Other operating expense 77,479 52,340 84,859 103,995 318,673 Net direct contribution 245,448 92,199 87,581 (229,591) 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 (loss) on repossessed assets, net 408 — — (408) — Corporate expense allocations 21,404 12,318 12,574 (46,296) — Net income (loss) before taxes 224,683 78,885 75,007 (182,938) 195,637 Federal and state income taxes 54,504 18,553 17,690 (46,746) 44,001 Net income (loss) 170,179 60,332 57,317 (136,192) 151,636 Net income attributable to non-controlling interests — — — 328 328 Net income (loss) attributable to BOK Financial Corp. shareholders $ 170,179 $ 60,332 $ 57,317 $ (136,520) $ 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 revenue from external sources $ 587,970 $ 38,974 $ 25,355 $ 22,310 $ 674,609 Net interest revenue (expense) from internal sources (60,714) 183,798 78,103 (201,187) — Net interest revenue 527,256 222,772 103,458 (178,877) 674,609 Net loans charged off and provision for credit losses 6,076 2,313 (69) 24,680 33,000 Net interest revenue after provision for credit losses 521,180 220,459 103,527 (203,557) 641,609 Other operating revenue 125,673 62,887 231,954 (33,600) 386,914 Other operating expense 150,613 102,538 166,898 204,436 624,485 Net direct contribution 496,240 180,808 168,583 (441,593) 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 (loss) on repossessed assets, net 1,267 14 — (1,281) — Corporate expense allocations 39,122 23,940 24,934 (87,996) — Net income (loss) before taxes 458,558 145,154 143,649 (343,323) 404,038 Federal and state income taxes 111,073 34,139 33,885 (89,191) 89,906 Net income (loss) 347,485 111,015 109,764 (254,132) 314,132 Net income attributable to non-controlling interests — — — 456 456 Net income (loss) attributable to BOK Financial Corp. shareholders $ 347,485 $ 111,015 $ 109,764 $ (254,588) $ 313,676 Average assets $ 28,166,923 $ 9,765,186 $ 12,309,730 $ (3,291,232) $ 46,950,607 Reportable segments reconciliation to the Consolidated Financial Statements for the three months ended June 30, 2022 is as follows (in thousands): Commercial Consumer Wealth Funds Management and Other BOK Net interest revenue from external sources $ 172,995 $ 16,784 $ 39,412 $ 44,827 $ 274,018 Net interest revenue (expense) from internal sources (6,452) 17,002 (1,665) (8,885) — Net interest revenue 166,543 33,786 37,747 35,942 274,018 Net loans charged off and provision for credit losses (1,502) 1,196 (60) 366 — Net interest revenue after provision for credit losses 168,045 32,590 37,807 35,576 274,018 Other operating revenue 61,688 30,089 86,761 (9,921) 168,617 Other operating expense 69,631 52,660 76,393 74,971 273,655 Net direct contribution 160,102 10,019 48,175 (49,316) 168,980 Gain (loss) on financial instruments, net 61 (15,860) — 15,799 — Change in fair value of mortgage servicing rights — 17,485 — (17,485) — Gain (loss) on repossessed assets, net (4,515) 93 — 4,422 — Corporate expense allocations 16,617 10,120 12,503 (39,240) — Net income before taxes 139,031 1,617 35,672 (7,340) 168,980 Federal and state income taxes 33,916 378 8,385 (6,557) 36,122 Net income 105,115 1,239 27,287 (783) 132,858 Net loss attributable to non-controlling interests — — — 12 12 Net income attributable to BOK Financial Corp. shareholders $ 105,115 $ 1,239 $ 27,287 $ (795) $ 132,846 Average assets $ 29,269,712 $ 10,338,191 $ 16,902,721 $ (9,222,090) $ 47,288,534 Reportable segments reconciliation to the Consolidated Financial Statements for the six months ended June 30, 2022 is as follows (in thousands): Commercial Consumer Wealth Funds Management and Other BOK Net interest revenue from external sources $ 320,585 $ 33,699 $ 95,643 $ 92,502 $ 542,429 Net interest revenue (expense) from internal sources (17,031) 27,294 (2,130) (8,133) — Net interest revenue 303,554 60,993 93,513 84,369 542,429 Net loans charged off and provision for credit losses 3,841 2,308 (131) (6,018) — Net interest revenue after provision for credit losses 299,713 58,685 93,644 90,387 542,429 Other operating revenue 119,115 64,050 111,779 (38,471) 256,473 Other operating expense 134,521 101,449 151,012 164,291 551,273 Net direct contribution 284,307 21,286 54,411 (112,375) 247,629 Gain (loss) on financial instruments, net (143) (73,755) — 73,898 — Change in fair value of mortgage servicing rights — 66,595 — (66,595) — Gain (loss) on repossessed assets, net (2,722) 138 — 2,584 — Corporate expense allocations 32,847 22,200 24,575 (79,622) — Net income before taxes 248,595 (7,936) 29,836 (22,866) 247,629 Federal and state income taxes 60,951 (1,858) 7,070 (13,844) 52,319 Net income 187,644 (6,078) 22,766 (9,022) 195,310 Net loss attributable to non-controlling interests — — — (24) (24) Net income attributable to BOK Financial Corp. shareholders $ 187,644 $ (6,078) $ 22,766 $ (8,998) $ 195,334 Average assets $ 29,545,278 $ 10,306,218 $ 19,101,045 $ (10,036,777) $ 48,915,764

Fees and Commissions Revenue Fe

Fees and Commissions Revenue Fees and Commissions Revenue	6 Months Ended
	Jun. 30, 2023
Revenue from Contract with Customer [Abstract]
Fees and Commissions Revenue [Text Block]	Fees and Commissions Revenue Fees and commissions revenue is generated through the sales of products, consisting primarily of financial instruments, and the performance of services for customers under contractual obligations. Revenue from providing services for customers is recognized at the time services are provided in an amount that reflects the consideration we expect to be entitled to for those services. Revenue is recognized based on the application of five steps: • Identify the contract with a customer • Identify the performance obligations in the contract • Determine the transaction price • Allocate the transaction price to the performance obligations in the contract • Recognize revenue when (or as) the Company satisfies a performance obligation For contracts with multiple performance obligations, individual performance obligations are accounted for separately if the customer can benefit from the good or service on its own or with other resources readily available to the customer, and the promise to transfer goods and services to the customer is separately identifiable in the contract. The transaction price is allocated to the performance obligations based on relative standalone selling prices. Revenue is recognized on a gross basis whenever we have primary responsibility and risk in providing the services or products to our customers and have discretion in establishing the price for the services or products. Revenue is recognized on a net basis whenever we act as an agent for products or services of others. Brokerage and trading revenue includes revenues from trading, customer hedging, retail brokerage and investment banking. Trading revenue includes net realized and unrealized gains primarily related to sales of securities to institutional customers and related derivative contracts. Customer hedging revenue includes realized and unrealized changes in the fair value of derivative contracts held for customer risk management programs including credit valuation adjustments, as necessary. We offer commodity, interest rate, foreign exchange and equity derivatives to our customers. These customer contracts are offset with contracts with selected counterparties and exchanges to minimize changes in market risk from changes in commodity prices, interest rates or foreign exchange rates. Retail brokerage revenue represents fees and commissions earned on sales of fixed income securities, annuities, mutual funds and other financial instruments to retail customers. Investment banking revenue includes fees earned upon completion of underwriting and financial advisory services. Investment banking revenue also includes fees earned in conjunction with loan syndications. Insurance brokerage revenues represents fees and commissions earned on placement of insurance products with carriers for property and casualty and health coverage. Transaction card revenue includes merchant discount fees and electronic funds transfer network fees, net of interchange fees paid to card issuers and assessments paid to card networks. Merchant discount fees represent fees paid by customers for account management and electronic processing of card transactions. Merchant discount fees are recognized at the time the customer's transactions are processed or other services are performed. The Company also maintains the TransFund electronic funds transfer network for the benefit of its members, which includes the Bank. Electronic funds transfer fees are recognized as electronic transactions processed on behalf of its members. Fiduciary and asset management revenue includes fees from asset management, custody, recordkeeping, investment advisory and administration services. Revenue is recognized on an accrual basis at the time the services are performed and may be based on either the fair value of the account or the service provided. Deposit service charges and fees include commercial account service charges, overdraft fees, check card fee revenue and automated service charge and other deposit service fees. Fees are recognized at least quarterly in accordance with published deposit account agreements and disclosure statements for retail accounts or contractual agreements for commercial accounts. Item charges for overdraft or non-sufficient funds items are recognized as items are presented for payment. Account balance charges and activity fees are accrued monthly and collected in arrears. Commercial account activity fees may be offset by an earnings credit based on account balances. Check card fees represent interchange fees paid by a merchant bank for transactions processed from cards issued by the Company. Check card fees are recognized when transactions are processed. Mortgage banking revenue includes revenues recognized in conjunction with the origination, marketing and servicing of conventional and government-sponsored residential mortgage loans. Mortgage production revenue includes net realized gains (losses) on sales of residential mortgage loans in the secondary market and the net change in unrealized gains (losses) on residential mortgage loans held for sale. Mortgage production revenue also includes changes in the fair value of derivative contracts not designated as hedging instruments related to residential mortgage loan commitments and forward sales contracts. Mortgage servicing revenue includes servicing fee income and late charges on loans serviced for others. Fees and commissions revenue by reportable segment and primary service line is as follows for the three months ended June 30, 2023. 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 — — 25,799 — 25,799 — 25,799 Corporate trust revenue — — 7,201 — 7,201 — 7,201 Institutional trust & retirement plan services revenue — — 13,223 — 13,223 — 13,223 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. 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 — — 49,744 — 49,744 — 49,744 Corporate trust revenue — — 14,861 — 14,861 — 14,861 Institutional trust & retirement plan services revenue — — 26,058 — 26,058 — 26,058 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. Fees and commissions revenue by reportable segment and primary service line is as follows for the three months ended June 30, 2022. Commercial Consumer Wealth Management Funds Management & Other Consolidated Out of Scope 1 In Scope 2 Trading revenue $ — $ — $ 11,991 $ — $ 11,991 $ 11,991 $ — Customer hedging revenue 7,740 — 305 5,088 13,133 13,133 — Retail brokerage revenue — — 4,258 — 4,258 — 4,258 Insurance brokerage revenue — — 2,818 — 2,818 — 2,818 Investment banking revenue 7,069 — 4,774 — 11,843 6,371 5,472 Brokerage and trading revenue 14,809 — 24,146 5,088 44,043 31,495 12,548 TransFund EFT network revenue 20,367 912 (19) 2 21,262 — 21,262 Merchant services revenue 3,867 10 — — 3,877 — 3,877 Corporate card revenue 1,594 — 101 106 1,801 — 1,801 Transaction card revenue 25,828 922 82 108 26,940 — 26,940 Personal trust revenue — — 25,676 — 25,676 — 25,676 Corporate trust revenue — — 6,476 — 6,476 — 6,476 Institutional trust & retirement plan services revenue — — 12,574 — 12,574 — 12,574 Investment management services and other revenue — — 5,112 — 5,112 — 5,112 Fiduciary and asset management revenue — — 49,838 — 49,838 — 49,838 Commercial account service charge revenue 13,791 469 523 (1) 14,782 — 14,782 Overdraft fee revenue 29 6,544 21 1 6,595 — 6,595 Check card revenue — 6,013 — 2 6,015 — 6,015 Automated service charge and other deposit fee revenue 21 1,061 25 1 1,108 — 1,108 Deposit service charges and fees 13,841 14,087 569 3 28,500 — 28,500 Mortgage production revenue — (504) — — (504) (504) — Mortgage servicing revenue — 12,368 — (496) 11,872 11,872 — Mortgage banking revenue — 11,864 — (496) 11,368 11,368 — Other revenue 5,403 3,228 12,136 (8,083) 12,684 7,900 4,784 Total fees and commissions revenue $ 59,881 $ 30,101 $ 86,771 $ (3,380) $ 173,373 $ 50,763 $ 122,610 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, 2022. Commercial Consumer Wealth Management Funds Management & Other 3 Consolidated Out of Scope 1 In Scope 2 Trading revenue $ — $ — $ (42,057) $ — $ (42,057) $ (42,057) $ — Customer hedging revenue 20,719 — 1,122 2,230 24,071 24,071 — Retail brokerage revenue — — 8,868 — 8,868 — 8,868 Insurance brokerage revenue — — 6,556 — 6,556 — 6,556 Investment banking revenue 10,427 — 9,099 — 19,526 9,470 10,056 Brokerage and trading revenue 31,146 — (16,412) 2,230 16,964 (8,516) 25,480 TransFund EFT network revenue 38,520 1,798 (36) 3 40,285 — 40,285 Merchant services revenue 7,508 20 — — 7,528 — 7,528 Corporate card revenue 2,970 — 177 196 3,343 — 3,343 Transaction card revenue 48,998 1,818 141 199 51,156 — 51,156 Personal trust revenue — — 50,473 — 50,473 — 50,473 Corporate trust revenue — — 10,434 — 10,434 — 10,434 Institutional trust & retirement plan services revenue — — 25,141 — 25,141 — 25,141 Investment management services and other revenue — — 10,233 (44) 10,189 — 10,189 Fiduciary and asset management revenue — — 96,281 (44) 96,237 — 96,237 Commercial account service charge revenue 26,922 919 1,036 — 28,877 — 28,877 Overdraft fee revenue 60 12,737 44 1 12,842 — 12,842 Check card revenue — 11,558 — 2 11,560 — 11,560 Automated service charge and other deposit fee revenue 44 2,168 11 2 2,225 — 2,225 Deposit service charges and fees 27,026 27,382 1,091 5 55,504 — 55,504 Mortgage production revenue — 4,551 — — 4,551 4,551 — Mortgage servicing revenue — 24,444 — (977) 23,467 23,467 — Mortgage banking revenue — 28,995 — (977) 28,018 28,018 — Other revenue 9,675 5,883 30,693 (23,122) 23,129 15,175 7,954 Total fees and commissions revenue $ 116,845 $ 64,078 $ 111,794 $ (21,709) $ 271,008 $ 34,677 $ 236,331 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

Fair Value Measurements	6 Months Ended
	Jun. 30, 2023
Fair Value Disclosures [Abstract]
Fair Value Measurements [Text Block]	Fair Value Measurements Fair value is defined by applicable accounting guidance as the price to sell an asset or transfer a liability in an orderly transaction between market participants in the principal market for the given asset or liability at the measurement date based on market conditions at that date. An orderly transaction assumes exposure to the market for a customary period for marketing activities prior to the measurement date and not a forced liquidation or distressed sale. Certain assets and liabilities are recorded in the Company's financial statements at fair value. Some are recorded on a recurring basis and some on a non-recurring basis. For some assets and liabilities, observable market transactions and market information might be available. For other assets and liabilities, observable market transactions and market information might not be available. A hierarchy for fair value has been established which categorizes into three levels the inputs to valuation techniques used to measure fair value. The three levels are as follows: Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) - Fair value is based on unadjusted quoted prices in active markets for identical assets or liabilities. Significant Other Observable Inputs (Level 2) - Fair value is based on significant other observable inputs which are generally determined based on a single price for each financial instrument provided to us by an applicable third-party pricing service and is based on one or more of the following: • Quoted prices for similar, but not identical, assets or liabilities in active markets; • Quoted prices for identical or similar assets or liabilities in inactive markets; • Inputs other than quoted prices that are observable, such as interest rate and yield curves, volatilities, prepayment speeds, loss severities, credit risks and default rates; • Other inputs derived from or corroborated by observable market inputs. Significant Unobservable Inputs (Level 3) - Fair value is based upon model-based valuation techniques for which at least one significant assumption is not observable in the market. Transfers between levels are recognized as of the end of the reporting period. There were no transfers in or out of quoted prices in active markets for identical instruments to significant other observable inputs or significant unobservable inputs during the three and six months ended June 30, 2023 and 2022, respectively. Transfers between significant other observable inputs and significant unobservable inputs during the three and six months ended June 30, 2023 and 2022 were immaterial. The underlying methods used by the third-party pricing services are considered in determining the primary inputs used to determine fair values. Management has evaluated the methodologies employed by the third-party pricing services by comparing the price provided by the pricing service with other sources, including brokers' quotes, sales or purchases of similar instruments and discounted cash flows to establish a basis for reliance on the pricing service values. Significant differences between the pricing service provided value and other sources are discussed with the pricing service to understand the basis for their values. Based on all observable inputs, management may adjust prices obtained from third-party pricing services to more appropriately reflect the prices that would be received to sell assets or paid to transfer liabilities in orderly transactions in the current market. No significant adjustments were made to prices provided by third-party pricing services at June 30, 2023 or December 31, 2022. Assets and Liabilities Measured at Fair Value on a Recurring Basis The fair value of financial assets and liabilities measured on a recurring basis was as follows as of June 30, 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 $ 46,994 $ 4,963 $ 42,031 $ — Residential agency mortgage-backed securities 5,334,372 — 5,334,372 — Municipal securities 49,595 — 49,595 — Other trading securities 11,403 — 11,403 — Total trading securities 5,442,364 4,963 5,437,401 — Available for sale securities: U.S. Treasury 901 901 — — Municipal securities 491,715 — 491,715 — Residential agency mortgage-backed securities 6,114,202 — 6,114,202 — Residential non-agency mortgage-backed securities 699,178 — 699,178 — Commercial agency mortgage-backed securities 4,632,054 — 4,632,054 — Other debt securities 473 — — 473 Total available for sale securities 11,938,523 901 11,937,149 473 Fair value option securities — Residential agency mortgage-backed securities 212,321 — 212,321 — Residential mortgage loans held for sale 1 94,820 — 87,572 7,248 Mortgage servicing rights 2 304,722 — — 304,722 Derivative contracts, net of cash collateral 3 353,037 2,506 350,531 — Liabilities: Derivative contracts, net of cash collateral 3 550,653 4 550,649 — 1 Residential mortgage loans held for sale measured at fair value on a recurring basis using significant unobservable inputs (Level 3) consist of residential mortgage loans intended for sale to U.S. government agencies that fail to meet conforming standards and are valued at 78.99% 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, 2022 (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 $ 9,823 $ 4,970 $ 4,853 $ — Residential agency mortgage-backed securities 4,406,848 — 4,406,848 — Municipal securities 21,484 — 21,484 — Other trading securities 26,006 — 26,006 — Total trading securities 4,464,161 4,970 4,459,191 — Available for sale securities: U.S. Treasury 898 898 — — Municipal securities 624,500 — 624,500 — Residential agency mortgage-backed securities 5,814,496 — 5,814,496 — Residential non-agency mortgage-backed securities 577,576 — 577,576 — Commercial agency mortgage-backed securities 4,475,917 — 4,475,917 — Other debt securities 473 — — 473 Total available for sale securities 11,493,860 898 11,492,489 473 Fair value option securities — Residential agency mortgage-backed securities 296,590 — 296,590 — Residential mortgage loans held for sale 1 75,272 — 68,054 7,218 Mortgage servicing rights 2 277,608 — — 277,608 Derivative contracts, net of cash collateral 3 880,343 2,110 878,233 — Liabilities: Derivative contracts, net of cash collateral 3 554,900 16 554,884 — 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 77.55% 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 Capital Markets, 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, 2023 for which the fair value was adjusted during the six months ended June 30, 2023: 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 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, 2022 for which the fair value was adjusted during the six months ended June 30, 2022: Fair Value Adjustments for the Carrying Value at June 30, 2022 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 $ — $ 99 $ 126 $ — $ — $ 478 $ — Real estate and other repossessed assets — 1,412 1,699 — (5,811) — (5,705) The fair value of collateral-dependent nonaccruing loans secured by real estate and real estate and other repossessed assets and the related fair value adjustments are generally based on unadjusted third-party appraisals. Our appraisal review policies require appraised values to be supported by observed inputs derived principally from or corroborated by observable market data. Appraisals that are not based on observable inputs or that require significant adjustments or fair value measurements that are not based on third-party appraisals are considered to be based on significant unobservable inputs. Non-recurring fair value measurements of collateral-dependent nonaccruing loans and real estate and other repossessed assets based on significant unobservable inputs are generally due to estimates of current fair values between appraisal dates. Significant unobservable inputs include listing prices for the same or comparable assets, uncorroborated expert opinions or management's knowledge of the collateral or industry. Non-recurring fair value measurements of collateral dependent loans secured by mineral rights are generally determined by our internal staff of engineers on projected cash flows under current market conditions and are based on significant unobservable inputs. Projected cash flows are discounted according to risk characteristics of the underlying oil and gas properties. Assets are evaluated to demonstrate with reasonable certainty that crude oil, natural gas and natural gas liquids can be recovered from known oil and gas reservoirs under existing economic and operating conditions at current prices with existing conventional equipment, operating methods and costs. Significant unobservable inputs are developed by asset management and workout professionals and approved by senior Credit Administration executives. A summary of quantitative information about Non-recurring Fair Value Measurements based on Significant Unobservable Inputs (Level 3) as of June 30, 2023 follows (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. A summary of quantitative information about Non-recurring Fair Value Measurements based on Significant Unobservable Inputs (Level 3) as of June 30, 2022 follows (in thousands): Fair Value Valuation Technique(s) Unobservable Input Range Nonaccruing loans $ 126 Discounted cash flows Management knowledge of industry and non-real estate collateral including, but not limited to, recoverable oil and gas reserves, forward-looking commodity prices, estimated operating costs 25% - 25% (25%) 1 Real estate and other repossessed assets 1,699 Discounted cash flows Management knowledge of industry and non-real estate collateral N/A 1 Represents fair value as a percentage of the unpaid principal balance. Fair Value of Financial Instruments The following table presents the carrying values and estimated fair values of all financial instruments, including those financial assets and liabilities that are not measured and reported at fair value on a recurring basis or are measured at fair value on a non-recurring basis as of June 30, 2023 (dollars 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 $ 875,714 $ 875,714 $ 875,714 $ — $ — Interest-bearing cash and cash equivalents 571,616 571,616 571,616 — — Trading securities: U.S. government securities 46,994 46,994 4,963 42,031 — Residential agency mortgage-backed securities 5,334,372 5,334,372 — 5,334,372 — Municipal securities 49,595 49,595 — 49,595 — Other trading securities 11,403 11,403 — 11,403 — Total trading securities 5,442,364 5,442,364 4,963 5,437,401 — Investment securities: Municipal securities 136,803 141,587 — 17,567 124,020 Residential agency mortgage-backed securities 2,205,685 2,014,427 — 2,014,427 — Commercial agency mortgage-backed securities 15,760 14,636 — 14,636 — Other debt securities 16,288 14,734 — 14,734 — Total investment securities 2,374,536 2,185,384 — 2,061,364 124,020 Allowance for credit losses (465) — — — — Investment securities, net of allowance 2,374,071 2,185,384 — 2,061,364 124,020 Available for sale securities: U.S. Treasury 901 901 901 — — Municipal securities 491,715 491,715 — 491,715 — Residential agency mortgage-backed securities 6,114,202 6,114,202 — 6,114,202 — Residential non-agency mortgage-backed securities 699,178 699,178 — 699,178 — Commercial agency mortgage-backed securities 4,632,054 4,632,054 — 4,632,054 — Other debt securities 473 473 — — 473 Total available for sale securities 11,938,523 11,938,523 901 11,937,149 473 Fair value option securities — Residential agency mortgage-backed securities 212,321 212,321 — 212,321 — Residential mortgage loans held for sale 94,820 94,820 — 87,572 7,248 Loans: Commercial 14,534,516 14,428,246 — — 14,428,246 Commercial real estate 4,970,801 4,839,799 — — 4,839,799 Loans to individuals 3,732,342 3,578,079 — — 3,578,079 Total loans 23,237,659 22,846,124 — — 22,846,124 Allowance for loan losses (262,714) — — — — Loans, net of allowance 22,974,945 22,846,124 — — 22,846,124 Mortgage servicing rights 304,722 304,722 — — 304,722 Derivative instruments with positive fair value, net of cash collateral 353,037 353,037 2,506 350,531 — Deposits with no stated maturity 30,588,466 30,588,466 — — 30,588,466 Time deposits 2,706,377 2,672,789 — — 2,672,789 Other borrowed funds 9,223,920 9,221,872 — — 9,221,872 Subordinated debentures 131,154 112,501 — 112,501 — Derivative instruments with negative fair value, net of cash collateral 550,653 550,653 4 550,649 — The following table presents the carrying values and estimated fair values of all financial instruments, including those financial assets and liabilities that are not measured and reported at fair value on a recurring basis or are measured at fair value on a non-recurring basis as of December 31, 2022 (dollars 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 $ 943,810 $ 943,810 $ 943,810 $ — $ — Interest-bearing cash and cash equivalents 457,906 457,906 457,906 — — Trading securities: U.S. government securities 9,823 9,823 4,970 4,853 — Residential agency mortgage-backed securities 4,406,848 4,406,848 — 4,406,848 — Municipal securities 21,484 21,484 — 21,484 — Other trading securities 26,006 26,006 — 26,006 — Total trading securities 4,464,161 4,464,161 4,970 4,459,191 — Investment securities: Municipal securities 170,629 176,621 — 38,106 138,515 Residential agency mortgage-backed securities 2,315,219 2,143,360 — 2,143,360 — Commercial agency mortgage-backed securities 15,609 14,588 — 14,588 — Other debt securities 12,788 12,199 — 12,199 — Total investment securities 2,514,245 2,346,768 — 2,208,253 138,515 Allowance for credit losses (558) — — — — Investment securities, net of allowance 2,513,687 2,346,768 — 2,208,253 138,515 Available for sale securities: U.S. Treasury 898 898 898 — — Municipal securities 624,500 624,500 — 624,500 — Residential agency mortgage-backed securities 5,814,496 5,814,496 — 5,814,496 — Residential non-agency mortgage-backed securities 577,576 577,576 — 577,576 — Commercial agency mortgage-backed securities 4,475,917 4,475,917 — 4,475,917 — Other debt securities 473 473 — — 473 Total available for sale securities 11,493,860 11,493,860 898 11,492,489 473 Fair value option securities — Residential agency mortgage-backed securities 296,590 296,590 — 296,590 — Residential mortgage loans held for sale 75,272 75,272 — 68,054 7,218 Loans: Commercial 14,212,499 13,905,765 — — 13,905,765 Commercial real estate 4,606,777 4,454,048 — — 4,454,048 Loans to individuals 3,737,874 3,531,410 — — 3,531,410 Total loans 22,557,150 21,891,223 — — 21,891,223 Allowance for loan losses (235,704) — — — — Loans, net of allowance 22,321,446 21,891,223 — — 21,891,223 Mortgage servicing rights 277,608 277,608 — — 277,608 Derivative instruments with positive fair value, net of cash collateral 880,343 880,343 2,110 878,233 — Deposits with no stated maturity 33,018,863 33,018,863 — — 33,018,863 Time deposits 1,461,842 1,431,245 — — 1,431,245 Other borrowed funds 7,007,285 7,005,305 — — 7,005,305 Subordinated debentures 131,205 121,497 — 121,497 — Derivative instruments with negative fair value, net of cash collateral 554,900 554,900 16 554,884 — Because no market exists for certain of these financial instruments and management does not intend to sell these financial instruments, the fair values shown in the tables above may not represent values at which the respective financial instruments could be sold individually or in the aggregate at the given reporting date.

Subsequent Events

Subsequent Events	6 Months Ended
	Jun. 30, 2023
Subsequent Events [Abstract]
Subsequent Events [Text Block]	Subsequent Events The Company evaluated events from the date of the consolidated financial statements on June 30, 2023 through the issuance of those consolidated financial statements included in this Quarterly Report on Form 10-Q. No events were identified requiring recognition in and/or disclosure in the consolidated financial statements.

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Pay vs Performance Disclosure
Net Income (Loss) Attributable to Parent	$ 151,308	$ 132,846	$ 313,676	$ 195,334

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Jun. 30, 2023
Trading Arrangements, by Individual
Material Terms of Trading Arrangement	No Company director or officer (as defined in Exchange Act Rule 16a-1(f)) has adopted, modified or terminated any trading arrangements during the second quarter of 2023. Certain of our officers or directors have made elections to participate in, and are participating in, our dividend reinvestment plan and 401(k) plan, and have made, and may from time to time make, elections to have shares withheld to cover withholding taxes on issuances of shares to such officers or directors, which may be designed to satisfy the affirmative defense conditions of Rule 10b5-1 under the Exchange Act or may constitute non-Rule 10b5-1 trading arrangements (as defined in Item 408(c) of Regulation S-K).
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Significant Accounting Polici_2

Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2023
Accounting Policies [Abstract]
Basis of Accounting, Policy [Policy Text Block]	The accompanying unaudited consolidated financial statements of BOK Financial Corporation ("BOK Financial" or "the Company") have been prepared in accordance with accounting principles for interim financial information generally accepted in the United States and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included.
Principles of Consolidation [Policy Text Block]	The unaudited consolidated financial statements include accounts of BOK Financial and its subsidiaries, principally BOKF, NA ("the Bank"), BOK Financial Securities, Inc., and BOK Financial Private Wealth, Inc. Operating divisions of the Bank include Bank of Albuquerque, Bank of Oklahoma, Bank of Texas, BOK Financial in Arizona, Arkansas, Colorado and Kansas/Missouri, BOK Financial Mortgage and the TransFund electronic funds network.
Reclassification, Policy [Policy Text Block]	Certain reclassifications have been made to conform to the current period presentation.
Newly Adopted and Pending Accounting Policies [Policy Text Block]	Newly Adopted and Pending Accounting Policies Financial Accounting Standards Board ("FASB") FASB Accounting Standards Update No. 2022-02, Financial Instruments - Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures ("ASU 2022-02") On March 31, 2022, the FASB issued ASU 2022-02 which eliminates the accounting guidance on troubled debt restructurings ("TDRs") for creditors in ASC 310-40, while also no longer requiring an entity to consider renewals, modifications, and extensions that result from reasonably expected TDRs in their calculation of the allowance for credit losses. For receivables for which there has been a modification in their contractual cash flows, ASU 2022-02 requires disclosure, by class of financing receivable, of the types of modifications, the financial effects of those modifications, and the performance of these modified receivables, along with receivables that had a payment default during the current period and had modifications to the contractual cash flows within 12 months prior to the default. Further, ASU 2022-02 requires entities to disclose gross write-offs recorded in the current period by year of origination in the vintage disclosures on a year-to-date basis. ASU 2022-02 was effective for the Company January 1, 2023. Amendments related to TDR recognition and measurement and vintage disclosures were applied prospectively and are included in Note 4 to the consolidated financial statements. Adoption of this standard did not have a material effect on the Company's financial condition or results of operations. FASB Accounting Standards Update No. 2023-01, Leases (Topic 842): Common Control Arrangements ("ASU 2023-01") On March 27, 2023, the FASB issued ASU 2023-01 which, in part, amends the accounting for leasehold improvement in common-control arrangements. Under previous guidance, a lessee is generally required to amortize leasehold improvements that it owns over the shorter of the useful life of those improvements or the lease term. However, due to the nature of leasehold improvements made under leases between entities under common control, ASU 2023-01 requires a lessee in a common-control arrangement to amortize such leasehold improvements that it owns over the improvements' useful life to the common control group, regardless of the lease term. ASU 2023-01 is effective for fiscal years beginning after December 15, 2023, including interim periods within those fiscal years. Adoption of ASU 2023-01 is not expected to have a material impact on the Company's financial statements. FASB Accounting Standards Update No. 2023-02, Investments - Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method ("ASU 2023-02")
Derivatives, Policy [Policy Text Block]	Derivative instruments may be used by the Company as part of its internal risk management programs or may be offered to customers. All derivative instruments are carried at fair value, and changes in fair value are reported in earnings as they occur. Credit risk is also considered in determining fair value. Deterioration in the credit rating of customer or other counterparties reduce the fair value of asset contracts. Deterioration of our credit rating could decrease the fair value of our derivative liabilities. When bilateral netting agreements or similar arrangements exist between the Company and its counterparties that create a single legal claim or obligation to pay or receive the net amount in settlement of the individual derivative contracts, the Company reports derivative assets and liabilities on a net by derivative contract type by counterparty basis. Derivative contracts may require the Company to provide or receive cash margin as collateral for derivative assets and liabilities. Derivative assets and liabilities are reported net of cash margin when certain conditions are met. In addition, derivative contracts executed with customers under Customer Risk Management Programs may be secured by non-cash collateral in conjunction with a credit agreement with that customer. Access to collateral in the event of default is reasonably assured. None of these derivative contracts have been designated as hedging instruments for accounting purposes. Customer Risk Management Programs BOK Financial offers programs to permit its customers to manage various risks, including fluctuations in energy, cattle and other agricultural products, interest rates and foreign exchange rates with derivative contracts. Customers may also manage interest rate risk through interest rate swaps used by borrowers to modify interest rate terms of their loans. Derivative contracts are executed between the customers and BOK Financial. Offsetting contracts are executed between BOK Financial and other selected counterparties to minimize the risk of changes in commodity prices, interest rates or foreign exchange rates. The counterparty contracts are identical to customer contracts, except for a fixed pricing spread or fee paid to BOK Financial as profit and compensation for administrative costs and credit risk which is recognized over the life of the contracts and included in Other operating revenue – Brokerage and trading revenue in the Consolidated Statements of Earnings. Trading BOK Financial may offer derivative instruments such as to-be-announced securities to mortgage banking customers to enable them to manage their market risk or to mitigate the Company's market risk of holding trading securities. Changes in the fair value of derivative instruments for trading purposes or used to mitigate the market risk of holding trading securities are included in Other operating revenue – Brokerage and trading revenue. Internal Risk Management Programs BOK Financial may use derivative contracts in managing its interest rate sensitivity, as part of its economic hedge of the change in the fair value of mortgage servicing rights. Changes in the fair value of derivative instruments used in managing interest rate sensitivity and as part of the economic hedge of changes in the fair value of mortgage servicing rights are included in Other operating revenue – Gain (loss) on derivatives, net in the Consolidated Statements of Earnings.
Loans and Allowances for Credit Losses, Loans [Policy Text Block]	Loans Loans are either secured or unsecured based on the type of loan and the financial condition of the borrower. Repayment is generally expected from cash flow or proceeds from the sale of selected assets of the borrower. BOK Financial is exposed to risk of loss on loans due to the borrower's difficulties, which may arise from any number of factors, including problems within the respective industry or local economic conditions. Access to collateral, in the event of borrower default, is reasonably assured through adherence to applicable lending laws and through sound lending standards and credit review procedures. Accounting policies for all loans, excluding residential mortgage loans guaranteed by U.S. government agencies, are as follows. Interest is accrued at the applicable interest rate on the principal amount outstanding. Loans are placed on nonaccruing status when, in the opinion of management, full collection of principal or interest is uncertain. Internally risk graded loans are individually evaluated for nonaccruing status quarterly. Non-risk graded loans are generally placed on nonaccruing status when more than 90 days past due or within 60 days of being notified of the borrower's bankruptcy filing. Interest previously accrued but not collected is charged against interest income when the loan is placed on nonaccruing status. Accrued but not paid interest receivable is included in Receivables in the Consolidated Balance Sheets. Payments on nonaccruing loans are applied to principal or recognized as interest income, according to management's judgment as to the collectability of principal. Loans may be returned to accruing status when, in the opinion of management, full collection of principal and interest, including principal previously charged off, is probable based on improvements in the borrower's financial condition or a sustained period of performance. For loans acquired with no evidence of credit deterioration, discounts are accreted on either an individual basis for loans with unique characteristics or on a pool basis for groups of homogeneous loans. Accretion is discontinued when a loan with an individually attributed discount is placed on nonaccruing status. Modifications of loans to existing borrowers generally consist of interest rate reductions, extension of payment terms, or a combination of these. Modifications may arise either voluntarily through negotiations with the borrower or involuntarily through court order. Payment deferrals up to six months are generally considered to be short-term modifications. Generally, principal and accrued but unpaid interest is not voluntarily forgiven. A change to the allowance for credit losses is generally not recorded upon modification because the effect of most modifications made to borrowers experiencing financial difficulty is already included in the allowance methodology. Performing loans may be renewed under the current collateral value, debt service ratio and other underwriting standards. Nonaccruing loans may be renewed and will remain classified as nonaccruing. Occasionally, loans, other than residential mortgage loans, may be held for sale in order to manage credit concentration. These loans are carried at the lower of cost or fair value with gains or losses recognized in Other gains (losses), net in the Consolidated Statements of Earnings. All loans are charged off when the loan balance or a portion of the loan balance is no longer supported by the paying capacity of the borrower or when the required cash flow is reduced in a modification. The charge-off amount is determined through a quarterly evaluation of available cash resources and collateral values. Internally risk graded loans are evaluated quarterly, and charge-offs are taken in the quarter in which the loss is identified. Non-risk graded loans that are past due between 60 days and 180 days, based on the loan product type, are charged off. Loans to borrowers whose personal obligation has been discharged through Chapter 7 bankruptcy proceedings are charged off within 60 days of notice of the bankruptcy filing, regardless of payment status. Loan origination and commitment fees and direct loan acquisition and origination costs are deferred and amortized as an adjustment to yield over the life of the loan or over the commitment period, as applicable. Amortization does not anticipate loan prepayments. Net unamortized fees are recognized in full at time of payoff. Qualifying residential mortgage loans guaranteed by U.S. government agencies have been sold into GNMA pools. Under certain performance conditions specified in government programs, the Company may have the right, but not the obligation to repurchase loans from GNMA pools. These loans no longer qualify for sale accounting and are recognized in the Consolidated Balance Sheets. We do not expect to receive all principal and interest based on the loan's contractual terms. A portion of the principal balance continues to be guaranteed; however, interest accrues at a curtailed rate as specified in the programs. The carrying value of these loans is reduced based on an estimate of the expected cash flows discounted at the original note rate plus a liquidity spread. Guaranteed loans may be modified in accordance with U.S. government agency guidelines. Interest continues to accrue based on the modified rate. Guaranteed loans may either be resold into GNMA pools after a performance period specified by the programs or foreclosed and conveyed to the guarantors.
Loans 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 on-going evaluation of the estimated expected credit losses in the portfolio and on unused commitments to provide financing. A well-documented methodology has been developed and is applied by an independent Credit Administration department to assure consistency across the Company. The allowance for loan losses consists of specific allowances attributed to certain individual loans, generally nonaccruing loans, with dissimilar risk characteristics that have not yet been charged down to amounts we expect to recover and general allowances for estimated credit losses on pools of loans that share similar risk characteristics. When full collection of principal or interest is uncertain, the loan's risk characteristics have changed, and we exclude the loan from the general allowance pool, typically designating it as nonaccruing. For these loans, a specific allowance reflects the expected credit loss. We measure specific allowances for loans excluded from the general allowance pool by an evaluation of estimated future cash flows discounted at the loan's initial effective interest rate or the fair value of collateral for certain collateral dependent loans. For a non-collateral dependent loan, the specific allowance is the amount by which the loan's amortized cost basis exceeds its net realizable value. We measure the specific allowance for collateral dependent loans as the amount by which the loan's amortized cost basis exceeds its fair value. When repayment is expected to be provided substantially through the sale of collateral, we deduct estimated selling costs from the collateral's fair value. Generally, for real property held as collateral for loans, third party appraisals that conform to Uniform Standards of Professional Appraisal Practice serve as the basis for the fair value of real property held as collateral. These appraised values are on an "as-is" basis and generally are not adjusted by the Company. We obtain updated appraisals at least annually or more frequently if market conditions indicate collateral values may have declined. For energy loans, our internal staff of engineers generally determines collateral value of mineral rights based on projected cash flows from proven oil and gas reserves under existing economic and operating conditions. For real property held as collateral for other loans, third party appraisals that conform to Uniform Standards of Professional Appraisal Practice generally serve as the basis for the fair value. These appraised values are on an "as-is" basis and generally are not adjusted by the Company. We obtain updated appraisals at least annually or more frequently if market conditions indicate collateral values may have declined. Our special assets staff generally determines the value of other collateral based on projected liquidation cash flows under current market conditions. We evaluate collateral values and available cash resources quarterly. Historical statistics may be used to estimate specific allowances in limited situations, such as when a collateral dependent loan is removed from the general allowance pool near the end of a reporting period until an appraisal of collateral value is received or a full assessment of future cash flows is completed. General allowances estimate expected credit losses on pools of loans sharing similar risk characteristics that are expected to occur over the loan's estimated remaining life. The loan's estimated remaining life represents the contractual term adjusted for amortization, estimates of prepayments, and borrower-owned extension options. Approximately 90 percent of the committed dollars in the loan portfolio is risk graded loans with general allowance model inputs that include probability of default, loss given default, and exposure at default. Probability of default is based on the migration of loans from performing to nonperforming using historical life of loan analysis periods. Loss given default is based on the aggregate losses incurred, net of estimated recoveries. Exposure at default represents an estimate of the outstanding amount of credit exposure at the time a default may occur. Charge-off migration is used to calculate the general allowance for the majority of non-risk graded loans to individuals. The expected credit loss on less than 10 percent of the committed dollars in the portfolio is calculated using charge-off migration. The expected credit loss on approximately 1 percent of the committed dollars in the portfolio is calculated using a non-modeled approach. Specifically, the calculation applies a long-term net charge-off rate to the loan balances, adjusted for the weighted average remaining maturity of each portfolio. In estimating the expected credit losses for general allowances on performing risk-graded loans, each portfolio class is assigned relevant economic loss drivers which best explain variations in portfolio net loss rates. The probability of default estimates for each portfolio class are adjusted for current and forecasted economic conditions. The result is applied to the exposure at default and loss given default to calculate the lifetime expected credit loss estimate. Selection of relevant economic loss drivers is re-evaluated periodically and involves statistical analysis as well as management judgment. The unemployment rate factors significantly in the allowance for loan losses calculation, affecting commercial and loans to individuals segments. Other primary factors impacting the commercial portfolio include BBB corporate spreads, real gross domestic product growth rate, and energy commodity prices. The primary commercial real estate variables are vacancy rate and BBB corporate spreads. In addition to the unemployment rate, the forecast for loans to individuals is tied to a home price index. The forecasts may include regional economic factors when localized conditions diverge from national conditions. An Economic Forecast Committee, consisting of senior management with members largely independent of the allowance process develops a twelve-month forward-looking forecast for the relevant economic loss drivers. Management develops these forecasts based on external data as well as a view of future economic conditions which may include adjustments for regional conditions. The forecast includes three economic scenarios and probability weights for each scenario. The base forecast represents management's view of the most likely outcome, while the downside forecast reflects reasonably possible worsening economic conditions, and the upside forecast projects reasonably possible improving conditions. At the end of the one-year reasonable and supportable forecast period, we transition from shorter-term expected losses to long-term loss averages for the loan's estimated remaining life. The difference between short-term loss forecasts and long-term loss averages is run-off over the reversion horizon, up to three years, depending on the forecasted economic scenarios. General allowances also consider the estimated impact of factors that are not captured in the modeled results or historical experience. These factors may increase or decrease modeled results by amounts determined by the Allowance Committee. Factors not captured in modeled results or historical experience may include for example, new lines of business, market conditions that have not been previously encountered, observed changes in credit risk that are not yet reflected in macro-economic factors, or economic conditions that impact loss given default assumptions. The accrual for off-balance sheet credit risk is maintained at a level that is appropriate to cover estimated losses associated with credit instruments that are not currently recognized as assets such as loan commitments, standby letters of credit or guarantees that are not unconditionally cancelable by the bank. This accrual is included in other liabilities in the Consolidated Balance Sheets. The appropriateness of the accrual is determined in the same manner as the allowance for loan losses, with the added consideration of commitment usage over the remaining life for those loans that the bank can not unconditionally cancel.
Revenue [Policy Text Block]	Fees and commissions revenue is generated through the sales of products, consisting primarily of financial instruments, and the performance of services for customers under contractual obligations. Revenue from providing services for customers is recognized at the time services are provided in an amount that reflects the consideration we expect to be entitled to for those services. Revenue is recognized based on the application of five steps: • Identify the contract with a customer • Identify the performance obligations in the contract • Determine the transaction price • Allocate the transaction price to the performance obligations in the contract • Recognize revenue when (or as) the Company satisfies a performance obligation For contracts with multiple performance obligations, individual performance obligations are accounted for separately if the customer can benefit from the good or service on its own or with other resources readily available to the customer, and the promise to transfer goods and services to the customer is separately identifiable in the contract. The transaction price is allocated to the performance obligations based on relative standalone selling prices. Revenue is recognized on a gross basis whenever we have primary responsibility and risk in providing the services or products to our customers and have discretion in establishing the price for the services or products. Revenue is recognized on a net basis whenever we act as an agent for products or services of others. Brokerage and trading revenue includes revenues from trading, customer hedging, retail brokerage and investment banking. Trading revenue includes net realized and unrealized gains primarily related to sales of securities to institutional customers and related derivative contracts. Customer hedging revenue includes realized and unrealized changes in the fair value of derivative contracts held for customer risk management programs including credit valuation adjustments, as necessary. We offer commodity, interest rate, foreign exchange and equity derivatives to our customers. These customer contracts are offset with contracts with selected counterparties and exchanges to minimize changes in market risk from changes in commodity prices, interest rates or foreign exchange rates. Retail brokerage revenue represents fees and commissions earned on sales of fixed income securities, annuities, mutual funds and other financial instruments to retail customers. Investment banking revenue includes fees earned upon completion of underwriting and financial advisory services. Investment banking revenue also includes fees earned in conjunction with loan syndications. Insurance brokerage revenues represents fees and commissions earned on placement of insurance products with carriers for property and casualty and health coverage. Transaction card revenue includes merchant discount fees and electronic funds transfer network fees, net of interchange fees paid to card issuers and assessments paid to card networks. Merchant discount fees represent fees paid by customers for account management and electronic processing of card transactions. Merchant discount fees are recognized at the time the customer's transactions are processed or other services are performed. The Company also maintains the TransFund electronic funds transfer network for the benefit of its members, which includes the Bank. Electronic funds transfer fees are recognized as electronic transactions processed on behalf of its members. Fiduciary and asset management revenue includes fees from asset management, custody, recordkeeping, investment advisory and administration services. Revenue is recognized on an accrual basis at the time the services are performed and may be based on either the fair value of the account or the service provided. Deposit service charges and fees include commercial account service charges, overdraft fees, check card fee revenue and automated service charge and other deposit service fees. Fees are recognized at least quarterly in accordance with published deposit account agreements and disclosure statements for retail accounts or contractual agreements for commercial accounts. Item charges for overdraft or non-sufficient funds items are recognized as items are presented for payment. Account balance charges and activity fees are accrued monthly and collected in arrears. Commercial account activity fees may be offset by an earnings credit based on account balances. Check card fees represent interchange fees paid by a merchant bank for transactions processed from cards issued by the Company. Check card fees are recognized when transactions are processed.

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities (Policies)	6 Months Ended
	Jun. 30, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives, Policy [Policy Text Block]	Derivative instruments may be used by the Company as part of its internal risk management programs or may be offered to customers. All derivative instruments are carried at fair value, and changes in fair value are reported in earnings as they occur. Credit risk is also considered in determining fair value. Deterioration in the credit rating of customer or other counterparties reduce the fair value of asset contracts. Deterioration of our credit rating could decrease the fair value of our derivative liabilities. When bilateral netting agreements or similar arrangements exist between the Company and its counterparties that create a single legal claim or obligation to pay or receive the net amount in settlement of the individual derivative contracts, the Company reports derivative assets and liabilities on a net by derivative contract type by counterparty basis. Derivative contracts may require the Company to provide or receive cash margin as collateral for derivative assets and liabilities. Derivative assets and liabilities are reported net of cash margin when certain conditions are met. In addition, derivative contracts executed with customers under Customer Risk Management Programs may be secured by non-cash collateral in conjunction with a credit agreement with that customer. Access to collateral in the event of default is reasonably assured. None of these derivative contracts have been designated as hedging instruments for accounting purposes. Customer Risk Management Programs BOK Financial offers programs to permit its customers to manage various risks, including fluctuations in energy, cattle and other agricultural products, interest rates and foreign exchange rates with derivative contracts. Customers may also manage interest rate risk through interest rate swaps used by borrowers to modify interest rate terms of their loans. Derivative contracts are executed between the customers and BOK Financial. Offsetting contracts are executed between BOK Financial and other selected counterparties to minimize the risk of changes in commodity prices, interest rates or foreign exchange rates. The counterparty contracts are identical to customer contracts, except for a fixed pricing spread or fee paid to BOK Financial as profit and compensation for administrative costs and credit risk which is recognized over the life of the contracts and included in Other operating revenue – Brokerage and trading revenue in the Consolidated Statements of Earnings. Trading BOK Financial may offer derivative instruments such as to-be-announced securities to mortgage banking customers to enable them to manage their market risk or to mitigate the Company's market risk of holding trading securities. Changes in the fair value of derivative instruments for trading purposes or used to mitigate the market risk of holding trading securities are included in Other operating revenue – Brokerage and trading revenue. Internal Risk Management Programs BOK Financial may use derivative contracts in managing its interest rate sensitivity, as part of its economic hedge of the change in the fair value of mortgage servicing rights. Changes in the fair value of derivative instruments used in managing interest rate sensitivity and as part of the economic hedge of changes in the fair value of mortgage servicing rights are included in Other operating revenue – Gain (loss) on derivatives, net in the Consolidated Statements of Earnings.

Securities (Tables)

Securities (Tables)	6 Months Ended
	Jun. 30, 2023
Marketable Securities [Abstract]
Trading Securities, [Table Text Block]	The fair value and net unrealized gain (loss) included in trading securities are as follows (in thousands): June 30, 2023 December 31, 2022 Fair Value Net Unrealized Gain (Loss) Fair Value Net Unrealized Gain (Loss) U.S. government securities $ 46,994 $ (13) $ 9,823 $ (16) Residential agency mortgage-backed securities 5,334,372 (33,275) 4,406,848 4 Municipal securities 49,595 140 21,484 (136) Other trading securities 11,403 (129) 26,006 (175) Total trading securities $ 5,442,364 $ (33,277) $ 4,464,161 $ (323)
Investment Securities (Held-to-Maturity) [Table Text Block]	The amortized cost and fair values of investment securities are as follows (in thousands): June 30, 2023 Amortized Carrying Fair Gross Unrealized Cost Value 1 Value Gain Loss Municipal securities $ 136,803 $ 136,803 $ 141,587 $ 5,168 $ (384) Mortgage-backed securities: Residential agency 2,397,098 2,205,685 2,014,427 128 (191,386) Commercial agency 17,259 15,760 14,636 — (1,124) Other debt securities 16,288 16,288 14,734 — (1,554) Total investment securities 2,567,448 2,374,536 2,185,384 5,296 (194,448) Allowance for credit losses (465) (465) — — — Investment securities, net of allowance $ 2,566,983 $ 2,374,071 $ 2,185,384 $ 5,296 $ (194,448) 1 Carrying value includes $193 million of net unrealized loss which remains in Accumulated other comprehensive income ("AOCI") in the Consolidated Balance Sheets related to certain securities transferred during the second quarter of 2022 from the Available for Sale securities portfolio to the Investment securities portfolio. December 31, 2022 Amortized Carrying Fair Gross Unrealized Cost Value 1 Value Gain Loss Municipal securities $ 170,629 $ 170,629 $ 176,621 $ 6,456 $ (464) Mortgage-backed securities: Residential agency 2,538,565 2,315,219 2,143,360 155 (172,014) Commercial agency 17,259 15,609 14,588 — (1,021) Other debt securities 12,788 12,788 12,199 — (589) Total investment securities 2,739,241 2,514,245 2,346,768 6,611 (174,088) Allowance for credit losses (558) (558) — — — Investment securities, net of allowance $ 2,738,683 $ 2,513,687 $ 2,346,768 $ 6,611 $ (174,088) 1 Carrying value includes $225 million of net unrealized loss which remains in Accumulated other comprehensive income ("AOCI") in the Consolidated Balance Sheets related to certain securities transferred during the second quarter of 2022 from the Available for Sale securities portfolio to the Investment securities portfolio. The amortized cost and fair values of investment securities at June 30, 2023, 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 $ 26,633 $ 100,361 $ 41,844 $ 13 $ 168,851 3.59 Fair value 26,772 104,295 39,877 13 170,957 Residential mortgage-backed securities: Carrying value $ 2,205,685 2 Fair value 2,014,427 Total investment securities: Carrying value $ 2,374,536 Fair value 2,185,384 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 5.3 years based upon current prepayment assumptions. Temporarily Impaired Investment Securities (dollars in thousands): June 30, 2023 Number of Securities Less Than 12 Months 12 Months or Longer Total Fair Unrealized Fair Unrealized Fair Unrealized Investment: Municipal securities 20 $ 16,740 $ 79 $ 6,484 $ 305 $ 23,224 $ 384 Mortgage-backed securities: Residential agency 116 2,309 128 2,010,981 191,258 2,013,290 191,386 Commercial agency 2 — — 14,637 1,124 14,637 1,124 Other debt securities 3 8,464 1,536 257 18 8,721 1,554 Total investment securities 141 $ 27,513 $ 1,743 $ 2,032,359 $ 192,705 $ 2,059,872 $ 194,448 December 31, 2022 Number of Securities Less Than 12 Months 12 Months or Longer Total Fair Unrealized Fair Unrealized Fair Unrealized Investment: Municipal securities 22 $ 18,037 $ 406 $ 544 $ 58 $ 18,581 $ 464 Mortgage-backed securities: Residential agency 116 2,142,114 172,014 — — 2,142,114 172,014 Commercial agency 2 14,588 1,021 — — 14,588 1,021 Other debt securities 3 9,428 571 257 18 9,685 589 Total investment securities 143 $ 2,184,167 $ 174,012 $ 801 $ 76 $ 2,184,968 $ 174,088
Available For Sale Securities [Table Text Block]	The amortized cost and fair value of available for sale securities are as follows (in thousands): June 30, 2023 Amortized Fair Gross Unrealized Cost Value Gain Loss U.S. Treasury $ 1,000 $ 901 $ — $ (99) Municipal securities 547,510 491,715 — (55,795) Mortgage-backed securities: Residential agency 6,492,794 6,114,202 852 (379,444) Residential non-agency 746,481 699,178 10,458 (57,761) Commercial agency 5,049,144 4,632,054 556 (417,646) Other debt securities 500 473 — (27) Total available for sale securities $ 12,837,429 $ 11,938,523 $ 11,866 $ (910,772) December 31, 2022 Amortized Fair Gross Unrealized Cost Value Gain Loss U.S. Treasury $ 1,000 $ 898 $ — $ (102) Municipal securities 687,875 624,500 321 (63,696) Mortgage-backed securities: Residential agency 6,161,358 5,814,496 13,085 (359,947) Residential non-agency 616,423 577,576 11,776 (50,623) Commercial agency 4,892,257 4,475,917 3,479 (419,819) Other debt securities 500 473 — (27) Total available for sale securities $ 12,359,413 $ 11,493,860 $ 28,661 $ (894,214) The amortized cost and fair values of available for sale securities at June 30, 2023, 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 $ 180,223 $ 2,894,432 $ 1,987,608 $ 535,891 $ 5,598,154 5.71 Fair value 178,499 2,675,529 1,769,950 501,165 5,125,143 Residential mortgage-backed securities: Amortized cost $ 7,239,275 2 Fair value 6,813,380 Total available for sale securities: Amortized cost $ 12,837,429 Fair value 11,938,523 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 4.5 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, 2023 2022 2023 2022 Proceeds $ 135,489 $ 156,116 $ 135,489 $ 211,301 Gross realized gains 703 1,461 703 3,394 Gross realized losses (3,713) (273) (3,713) (1,269) Related federal and state income tax expense (708) 278 (708) 497
Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value [Table Text Block]	June 30, 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 $ — $ — $ 901 $ 99 $ 901 $ 99 Municipal securities 192 35,516 1,022 456,199 54,773 491,715 55,795 Mortgage-backed securities: Residential agency 716 2,853,011 74,530 3,035,935 304,914 5,888,946 379,444 Residential non-agency 35 278,467 9,156 369,937 48,605 648,404 57,761 Commercial agency 302 998,353 23,530 3,528,331 394,116 4,526,684 417,646 Other debt securities 1 — — 473 27 473 27 Total available for sale securities 1,247 $ 4,165,347 $ 108,238 $ 7,391,776 $ 802,534 $ 11,557,123 $ 910,772 December 31, 2022 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 $ — $ — $ 899 $ 102 $ 899 $ 102 Municipal securities 227 146,634 5,301 428,248 58,395 574,882 63,696 Mortgage-backed securities: Residential agency 613 3,879,582 256,973 863,732 102,974 4,743,314 359,947 Residential non-agency 26 499,716 50,623 — — 499,716 50,623 Commercial agency 285 1,647,778 63,701 2,535,816 356,118 4,183,594 419,819 Other debt securities 1 — — 473 27 473 27 Total available for sale securities 1,153 $ 6,173,710 $ 376,598 $ 3,829,168 $ 517,616 $ 10,002,878 $ 894,214
Fair Value Option Securities [Table Text Block]	The fair value and net unrealized gain (loss) included in fair value option securities is as follows (in thousands): June 30, 2023 December 31, 2022 Fair Value Net Unrealized Gain (Loss) Fair Value Net Unrealized Gain (Loss) Residential agency mortgage-backed securities 212,321 (2,492) 296,590 338

Derivatives (Tables)

Derivatives (Tables)	6 Months Ended
	Jun. 30, 2023
Derivative Instrument Detail [Abstract]
Derivative Contracts [Table Text Block]	The following table summarizes the fair values of derivative contracts recorded as "derivative contracts" assets and liabilities in the balance sheet at June 30, 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 $ 2,667,177 $ 150,410 $ — $ 150,410 $ (146,700) $ 3,710 Energy contracts 8,269,088 914,855 (587,545) 327,310 (120,398) 206,912 Foreign exchange contracts 62,860 60,509 — 60,509 (1,862) 58,647 Equity option contracts 8,107 60 — 60 (56) 4 Total customer risk management programs 11,007,232 1,125,834 (587,545) 538,289 (269,016) 269,273 Trading 24,565,864 133,391 (51,516) 81,875 (153) 81,722 Internal risk management programs 190,000 2,042 — 2,042 — 2,042 Total derivative contracts $ 35,763,096 $ 1,261,267 $ (639,061) $ 622,206 $ (269,169) $ 353,037 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 $ 2,667,177 $ 150,412 $ — $ 150,412 $ — $ 150,412 Energy contracts 8,266,679 903,909 (587,545) 316,364 (23,427) 292,937 Foreign exchange contracts 62,154 59,632 — 59,632 — 59,632 Equity option contracts 8,107 60 — 60 — 60 Total customer risk management programs 11,004,117 1,114,013 (587,545) 526,468 (23,427) 503,041 Trading 20,340,860 96,506 (51,516) 44,990 (1,559) 43,431 Internal risk management programs 335,000 4,181 — 4,181 — 4,181 Total derivative contracts $ 31,679,977 $ 1,214,700 $ (639,061) $ 575,639 $ (24,986) $ 550,653 1 Notional amounts for commodity contracts are converted into dollar-equivalent amounts based on dollar prices at the inception of the contract. The following table summarizes the fair values of derivative contracts recorded as "derivative contracts" assets and liabilities in the balance sheet at December 31, 2022 (in thousands): Assets Notional 1 Gross Fair Value Netting Adjustments Net Fair Value Before Cash Collateral Cash Collateral Fair Value Net of Cash Collateral Customer risk management programs: Interest rate contracts $ 2,629,318 $ 158,825 $ — $ 158,825 $ (114,955) $ 43,870 Energy contracts 7,918,020 1,232,283 (594,543) 637,740 (67,024) 570,716 Foreign exchange contracts 219,791 216,569 — 216,569 — 216,569 Equity option contracts 21,102 193 — 193 (109) 84 Total customer risk management programs 10,788,231 1,607,870 (594,543) 1,013,327 (182,088) 831,239 Trading 17,400,037 126,910 (74,647) 52,263 (4,646) 47,617 Internal risk management programs 85,000 1,500 (13) 1,487 — 1,487 Total derivative contracts $ 28,273,268 $ 1,736,280 $ (669,203) $ 1,067,077 $ (186,734) $ 880,343 Liabilities Notional 1 Gross Fair Value Netting Adjustments Net Fair Value Before Cash Collateral Cash Collateral Fair Value Net of Cash Collateral Customer risk management programs: Interest rate contracts $ 2,629,122 $ 158,816 $ — $ 158,816 $ — $ 158,816 Energy contracts 8,696,060 1,242,058 (594,543) 647,515 (484,319) 163,196 Foreign exchange contracts 214,855 211,233 — 211,233 (7) 211,226 Equity option contracts 21,102 193 — 193 — 193 Total customer risk management programs 11,561,139 1,612,300 (594,543) 1,017,757 (484,326) 533,431 Trading 14,038,906 94,958 (74,647) 20,311 (423) 19,888 Internal risk management programs 178,806 1,594 (13) 1,581 — 1,581 Total derivative contracts $ 25,778,851 $ 1,708,852 $ (669,203) $ 1,039,649 $ (484,749) $ 554,900 1 Notional amounts for commodity contracts are converted into dollar-equivalent amounts based on dollar prices at the inception of the contract.
Derivative Instruments, Gain (Loss) in Statement of Earnings [Table Text Block]	The following summarizes the pre-tax net gains (losses) on derivative instruments and where they are recorded in the income statement (in thousands): Three Months Ended June 30, 2023 June 30, 2022 Brokerage Gain (Loss) on Derivatives, Net Brokerage Gain (Loss) on Derivatives, Net Customer risk management programs: Interest rate contracts $ 2,339 $ — $ 939 $ — Energy contracts 11,250 — 12,036 — Foreign exchange contracts 53 — 158 — Equity option contracts — — — — Total customer risk management programs 13,642 — 13,133 — Trading 1 64,172 — (15,376) — Internal risk management programs — (8,159) — (13,569) Total derivative contracts $ 77,814 $ (8,159) $ (2,243) $ (13,569) 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, 2023 June 30, 2022 Brokerage Gain (Loss) on Derivatives, Net Brokerage Gain (Loss) on Derivatives, Net Customer risk management programs: Interest rate contracts 4,109 — 7,281 — Energy contracts 17,803 — 16,484 — Foreign exchange contracts 84 — 306 — Equity option contracts — — — — Total customer risk management programs 21,996 — 24,071 — Trading 1 1,079 — 15,698 — Internal risk management programs — (9,503) — (60,550) Total derivative contracts $ 23,075 $ (9,503) $ 39,769 $ (60,550) 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, 2023
Loans and Leases Receivable, Net Amount [Abstract]
Schedule of Loans by Portfolio Segment [Table Text Block]	Portfolio segments of the loan portfolio are as follows (in thousands): June 30, 2023 December 31, 2022 Fixed Variable Non-accrual Total Fixed Variable Non-accrual Total Commercial $ 3,492,786 $ 10,968,453 $ 73,277 $ 14,534,516 $ 3,392,422 $ 10,759,780 $ 60,297 $ 14,212,499 Commercial real estate 878,947 4,074,459 17,395 4,970,801 874,716 3,715,491 16,570 4,606,777 Loans to individuals 2,133,208 1,557,555 41,579 3,732,342 2,099,165 1,593,779 44,930 3,737,874 Total $ 6,504,941 $ 16,600,467 $ 132,251 $ 23,237,659 $ 6,366,303 $ 16,069,050 $ 121,797 $ 22,557,150
Rollforward of Allowance For Loan Losses And Accrual for Off-Balance Sheet Credit Losses [Table Text Block]	The activity in the allowance for loan losses and the allowance for off-balance sheet credit losses related to loan commitments and standby letters of credit is summarized as follows (in thousands): Three Months Ended 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 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 losses 2,048 (2,809) (218) (979) Ending balance $ 20,294 $ 37,681 $ 1,965 $ 59,940 Three Months Ended June 30, 2022 Commercial Commercial Real Estate Loans to Individuals Total Allowance for loan losses: Beginning balance $ 151,448 $ 58,974 $ 36,051 $ 246,473 Provision for loan losses (15,468) 4,085 5,225 (6,158) Loans charged off (6) (78) (1,284) (1,368) Recoveries of loans previously charged off 1,588 16 563 2,167 Ending balance $ 137,562 $ 62,997 $ 40,555 $ 241,114 Allowance for off-balance sheet credit risk from unfunded loan commitments: Beginning balance $ 13,966 $ 20,465 $ 1,814 $ 36,245 Provision for off-balance sheet credit risk 1,873 4,205 (73) 6,005 Ending balance $ 15,839 $ 24,670 $ 1,741 $ 42,250 Six Months Ended June 30, 2022 Commercial Commercial Real Estate Loans to Individuals Total Allowance for loan losses: Beginning balance $ 162,056 $ 58,553 $ 35,812 $ 256,421 Provision for loan losses (20,586) 4,553 5,908 (10,125) Loans charged off (6,087) (269) (2,817) (9,173) Recoveries of loans previously charged off 2,179 160 1,652 3,991 Ending balance $ 137,562 $ 62,997 $ 40,555 $ 241,114 Allowance for off-balance sheet credit risk from unfunded loan commitments: Beginning balance $ 13,812 $ 17,442 $ 1,723 $ 32,977 Provision for off-balance sheet credit risk 2,027 7,228 18 9,273 Ending balance $ 15,839 $ 24,670 $ 1,741 $ 42,250 A $17.0 million provision for credit losses was necessary for the second quarter of 2023, primarily related to higher assumed commercial real estate vacancy rates during the forecast period and overall loan portfolio growth during the quarter. The allowance for loan losses and recorded investment of the related loans by portfolio segment for each measurement method at June 30, 2023 is as follows (in thousands): Collectively Measured Individually Measured Total Recorded Investment Related Allowance Recorded Investment Related Allowance Recorded Investment Related Commercial $ 14,461,239 $ 135,453 $ 73,277 $ 7,816 $ 14,534,516 $ 143,269 Commercial real estate 4,953,406 74,797 17,395 1,550 4,970,801 76,347 Loans to individuals 3,690,763 43,098 41,579 — 3,732,342 43,098 Total $ 23,105,408 $ 253,348 $ 132,251 $ 9,366 $ 23,237,659 $ 262,714 The allowance for loan losses and recorded investment of the related loans by portfolio segment for each measurement method at December 31, 2022 is as follows (in thousands): Collectively Measured Individually Measured Total Recorded Investment Related Allowance Recorded Investment Related Allowance Recorded Investment Related Commercial $ 14,152,202 $ 127,566 $ 60,297 $ 4,020 $ 14,212,499 $ 131,586 Commercial real estate 4,590,207 56,098 16,570 1,550 4,606,777 57,648 Loans to individuals 3,692,944 46,470 44,930 — 3,737,874 46,470 Total $ 22,435,353 $ 230,134 $ 121,797 $ 5,570 $ 22,557,150 $ 235,704
Schedule of Credit Quality Indicators [Table Text Block]	The following table summarizes the Company’s loan portfolio at June 30, 2023 by the risk grade categories and vintage (in thousands): Origination Year 2023 2022 2021 2020 2019 Prior Revolving Loans Revolving Loans Converted to Term Loans Total Commercial: Energy Pass $ 120,233 $ 99,929 $ 50,910 $ 8,713 $ 10,528 $ 10,884 $ 3,185,817 $ — $ 3,487,014 Accruing Substandard — — — — 651 1,050 — — 1,701 Nonaccrual — — — — — 117 19,920 — 20,037 Total energy 120,233 99,929 50,910 8,713 11,179 12,051 3,205,737 — 3,508,752 Loans charged-off, year-to-date — — — — — — — — — Healthcare Pass 357,976 857,991 584,067 465,489 367,300 958,933 275,267 17 3,867,040 Special Mention — — 18,722 6,986 14,025 32,123 980 — 72,836 Accruing Substandard — 540 — — — 12,518 1,700 — 14,758 Nonaccrual — — — — 25,967 10,786 — — 36,753 Total healthcare 357,976 858,531 602,789 472,475 407,292 1,014,360 277,947 17 3,991,387 Loans charged-off, year-to-date — — — — — — — — — Services Pass 378,254 681,854 461,897 262,276 158,543 759,638 820,662 607 3,523,731 Special Mention — 18,244 252 180 623 2,171 3,963 — 25,433 Accruing Substandard — 629 836 1,756 2,556 3,372 22,259 56 31,464 Nonaccrual — — 4,137 404 — — — — 4,541 Total services 378,254 700,727 467,122 264,616 161,722 765,181 846,884 663 3,585,169 Loans charged-off, year-to-date — — 882 — — — 1,899 — 2,781 General business Pass 443,873 624,377 292,674 158,127 158,780 339,584 1,327,452 2,352 3,347,219 Special Mention 898 3,461 7,449 44 114 1,485 15,563 — 29,014 Accruing Substandard — 41,341 2,931 46 — 6,072 10,629 10 61,029 Nonaccrual — — — — 14 60 11,843 29 11,946 Total general business 444,771 669,179 303,054 158,217 158,908 347,201 1,365,487 2,391 3,449,208 Loans charged-off, year-to-date — — — 2 — 12 4 10 28 Total commercial 1,301,234 2,328,366 1,423,875 904,021 739,101 2,138,793 5,696,055 3,071 14,534,516 Commercial real estate: Pass 281,559 1,541,831 1,173,425 491,657 543,242 790,115 117,939 — 4,939,768 Special Mention — — — — — 13,638 — — 13,638 Nonaccrual — — — — 7,343 10,052 — — 17,395 Total commercial real estate 281,559 1,541,831 1,173,425 491,657 550,585 813,805 117,939 — 4,970,801 Loans charged-off, year-to-date — — — — — 6,208 — — 6,208 Origination Year 2023 2022 2021 2020 2019 Prior Revolving Loans Revolving Loans Converted to Term Loans Total Loans to individuals: Residential mortgage Pass 190,406 339,049 359,330 363,831 59,080 267,776 356,384 22,218 1,958,074 Special Mention — 246 — 1,347 — 355 3,388 — 5,336 Accruing Substandard — — — — — 54 253 — 307 Nonaccrual — 1,147 2,280 2,828 729 20,042 2,228 719 29,973 Total residential mortgage 190,406 340,442 361,610 368,006 59,809 288,227 362,253 22,937 1,993,690 Loans charged-off, year-to-date — — 7 — — 4 1 — 12 Residential mortgage guaranteed by U.S. government agencies Pass — 1,184 2,089 5,872 7,690 157,862 — — 174,697 Nonaccrual — — — 299 641 10,533 — — 11,473 Total residential mortgage guaranteed by U.S. government agencies — 1,184 2,089 6,171 8,331 168,395 — — 186,170 Personal: Pass 83,233 230,418 175,862 151,387 130,574 199,122 575,095 249 1,545,940 Special Mention — 47 82 49 7 3 6,056 — 6,244 Accruing Substandard — — — — 160 — 5 — 165 Nonaccrual — 36 5 45 5 14 28 — 133 Total personal 83,233 230,501 175,949 151,481 130,746 199,139 581,184 249 1,552,482 Loans charged-off, year-to-date — 43 40 16 — 2,584 4 1 2,688 Total loans to individuals 273,639 572,127 539,648 525,658 198,886 655,761 943,437 23,186 3,732,342 Total loans $ 1,856,432 $ 4,442,324 $ 3,136,948 $ 1,921,336 $ 1,488,572 $ 3,608,359 $ 6,757,431 $ 26,257 $ 23,237,659 The following table summarizes the Company's loan portfolio at December 31, 2022 by the risk grade categories and vintage (in thousands): Origination Year 2022 2021 2020 2019 2018 Prior Revolving Loans Revolving Loans Converted to Term Loans Total Commercial: Energy Pass $ 157,745 $ 76,951 $ 30,284 $ 12,783 $ 5,992 $ 4,980 $ 3,104,906 $ — $ 3,393,641 Accruing Substandard — — — 664 385 683 28,018 — 29,750 Nonaccrual — — — — — 159 1,240 — 1,399 Total energy 157,745 76,951 30,284 13,447 6,377 5,822 3,134,164 — 3,424,790 Healthcare Pass 932,097 604,886 476,854 404,204 464,989 618,163 245,898 20 3,747,111 Special Mention — — — 20,071 — 18,859 4 — 38,934 Accruing Substandard — — — — — 14,304 3,634 — 17,938 Nonaccrual — — — 26,480 6,373 8,181 — — 41,034 Total healthcare 932,097 604,886 476,854 450,755 471,362 659,507 249,536 20 3,845,017 Services Pass 821,785 496,510 286,085 193,481 156,736 696,300 722,371 639 3,373,907 Special Mention 502 5,139 989 771 894 1,345 8,668 — 18,308 Accruing Substandard — — — 2,459 43 2,789 17,665 122 23,078 Nonaccrual — 5,570 449 — — 2,389 7,820 — 16,228 Total services 822,287 507,219 287,523 196,711 157,673 702,823 756,524 761 3,431,521 General business Pass 725,894 361,839 198,274 172,878 139,140 283,694 1,570,536 2,329 3,454,584 Special Mention 17,759 13,065 208 71 7 2,291 7,094 26 40,521 Accruing Substandard — 2,169 66 4,130 4,680 3,287 94 4 14,430 Nonaccrual — — 1,052 14 72 5 485 8 1,636 Total general business 743,653 377,073 199,600 177,093 143,899 289,277 1,578,209 2,367 3,511,171 Total commercial 2,655,782 1,566,129 994,261 838,006 779,311 1,657,429 5,718,433 3,148 14,212,499 Commercial real estate: Pass 1,188,483 1,158,002 552,616 641,102 247,625 633,304 161,616 — 4,582,748 Accruing Substandard — — — 7,459 — — — — 7,459 Nonaccrual — — — — — 16,570 — — 16,570 Total commercial real estate 1,188,483 1,158,002 552,616 648,561 247,625 649,874 161,616 — 4,606,777 Origination Year 2022 2021 2020 2019 2018 Prior Revolving Loans Revolving Loans Converted to Term Loans Total Loans to individuals: Residential mortgage Pass 354,497 373,190 393,002 63,142 40,525 260,625 352,126 22,176 1,859,283 Special Mention — 81 42 — 142 388 527 87 1,267 Accruing Substandard — — 187 — — 138 117 1 443 Nonaccrual 32 1,656 2,717 362 1,904 20,139 2,216 765 29,791 Total residential mortgage 354,529 374,927 395,948 63,504 42,571 281,290 354,986 23,029 1,890,784 Residential mortgage guaranteed by U.S. government agencies Pass 289 2,254 9,000 10,722 17,244 191,426 — — 230,935 Nonaccrual — — 299 1,460 2,319 10,927 — — 15,005 Total residential mortgage guaranteed by U.S. government agencies 289 2,254 9,299 12,182 19,563 202,353 — — 245,940 Personal: Pass 254,497 193,095 154,887 172,114 68,871 201,278 549,187 332 1,594,261 Special Mention 47 28 40 12 17 — 6,003 4 6,151 Accruing Substandard — 444 — 160 — — — — 604 Nonaccrual 38 7 12 22 14 18 23 — 134 Total personal 254,582 193,574 154,939 172,308 68,902 201,296 555,213 336 1,601,150 Total loans to individuals 609,400 570,755 560,186 247,994 131,036 684,939 910,199 23,365 3,737,874 Total loans $ 4,453,665 $ 3,294,886 $ 2,107,063 $ 1,734,561 $ 1,157,972 $ 2,992,242 $ 6,790,248 $ 26,513 $ 22,557,150
Financing Receivable, Nonaccrual [Table Text Block]	A summary of nonaccruing loans at June 30, 2023 follows (in thousands): As of June 30, 2023 Total With No With Allowance Related Allowance Commercial: Energy $ 20,037 $ 20,037 $ — $ — Healthcare 36,753 36,753 — — Services 4,541 404 4,137 3,218 General business 11,946 7,348 4,598 4,598 Total commercial 73,277 64,542 8,735 7,816 Commercial real estate 17,395 7,504 9,891 1,550 Loans to individuals: Residential mortgage 29,973 29,973 — — Residential mortgage guaranteed by U.S. government agencies 11,473 11,473 — — Personal 133 133 — — Total loans to individuals 41,579 41,579 — — Total $ 132,251 $ 113,625 $ 18,626 $ 9,366 A summary of nonaccruing loans at December 31, 2022 follows (in thousands): As of December 31, 2022 Total With No With Allowance Related Allowance Commercial: Energy $ 1,399 $ 1,399 $ — $ — Healthcare 41,034 34,661 6,373 946 Services 16,228 7,835 8,393 3,074 General business 1,636 1,636 — — Total commercial 60,297 45,531 14,766 4,020 Commercial real estate 16,570 393 16,177 1,550 Loans to individuals: Residential mortgage 29,791 29,791 — — Residential mortgage guaranteed by U.S. government agencies 15,005 15,005 — — Personal 134 134 — — Total loans to individuals 44,930 44,930 — — Total $ 121,797 $ 90,854 $ 30,943 $ 5,570
Summary of Loans by Aging Status [Table Text Block]	A summary of loans currently performing and past due as of June 30, 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: Energy $ 3,508,752 $ — $ — $ — $ 3,508,752 $ — Healthcare 3,959,317 — — 32,070 3,991,387 — Services 3,582,538 2,172 55 404 3,585,169 — General business 3,444,191 4,893 118 6 3,449,208 6 Total commercial 14,494,798 7,065 173 32,480 14,534,516 6 Commercial real estate 4,963,458 — — 7,343 4,970,801 — Loans to individuals: Residential mortgage 1,976,973 10,537 2,850 3,330 1,993,690 54 Residential mortgage guaranteed by U.S. government agencies 75,333 30,504 18,302 62,031 186,170 55,782 Personal 1,548,084 3,185 1,009 204 1,552,482 160 Total loans to individuals 3,600,390 44,226 22,161 65,565 3,732,342 55,996 Total $ 23,058,646 $ 51,291 $ 22,334 $ 105,388 $ 23,237,659 $ 56,002 A summary of loans currently performing and past due as of December 31, 2022 is as follows (in thousands): Past Due Past Due 90 Days or More and Accruing Current 30 to 59 60 to 89 Days 90 Days Total Commercial: Energy $ 3,424,766 $ 24 $ — $ — $ 3,424,790 $ — Healthcare 3,812,164 5,914 26,480 459 3,845,017 — Services 3,423,042 1,060 2,461 4,958 3,431,521 — General business 3,509,094 257 1,424 396 3,511,171 396 Total commercial 14,169,066 7,255 30,365 5,813 14,212,499 396 Commercial real estate 4,606,029 531 — 217 4,606,777 — Loans to individuals: Residential mortgage 1,872,155 10,632 1,828 6,169 1,890,784 114 Residential mortgage guaranteed by U.S. government agencies 108,019 36,119 19,400 82,402 245,940 75,604 Personal 1,600,595 502 21 32 1,601,150 — Total loans to individuals 3,580,769 47,253 21,249 88,603 3,737,874 75,718 Total $ 22,355,864 $ 55,039 $ 51,614 $ 94,633 $ 22,557,150 $ 76,114

Mortgage Banking Activities (Ta

Mortgage Banking Activities (Tables)	6 Months Ended
	Jun. 30, 2023
Mortgage Banking [Abstract]
Components of Residential Mortgage Loans Held For Sale [Table Text Block]	June 30, 2023 December 31, 2022 Unpaid Principal Balance/ Fair Value Unpaid Principal Balance/ Fair Value Residential mortgage loans held for sale $ 93,379 $ 92,250 $ 74,941 $ 73,938 Residential mortgage loan commitments 55,031 1,829 45,492 1,054 Forward sales contracts 124,228 741 109,469 280 $ 94,820 $ 75,272
Mortgage Banking Revenue [Table Text Block]	Mortgage banking revenue was as follows (in thousands): Three Months Ended Six Months Ended 2023 2022 2023 2022 Production revenue: Net realized gains (losses) on sale of mortgage loans $ (296) $ 3,158 $ (2,027) $ 10,041 Net change in unrealized gain (loss) on mortgage loans held for sale (496) 2,307 (126) (3,520) Net change in the fair value of mortgage loan commitments (865) 998 775 (2,300) Net change in the fair value of forward sales contracts 1,373 (6,967) 461 330 Total production revenue (284) (504) (917) 4,551 Servicing revenue 15,425 11,872 30,425 23,467 Total mortgage banking revenue $ 15,141 $ 11,368 $ 29,508 $ 28,018
Summary of Mortgage Servicing Rights [Table Text Block]	The following represents a summary of mortgage servicing rights (dollars in thousands): June 30, 2023 December 31, 2022 Number of residential mortgage loans serviced for others 116,980 110,541 Outstanding principal balance of residential mortgage loans serviced for others $ 20,693,294 $ 18,863,201 Weighted average interest rate 3.58 % 3.59 % Remaining term (in months) 283 283
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, 2023 2022 2023 2022 Beginning Balance $ 299,803 $ 209,563 $ 277,608 $ 163,198 Additions 4,103 5,754 6,603 10,969 Acquisitions — 44,867 31,138 44,867 Change in fair value due to principal payments (8,445) (7,357) (13,829) (15,317) Change in fair value due to market assumption changes 9,261 17,485 3,202 66,595 Ending Balance $ 304,722 $ 270,312 $ 304,722 $ 270,312
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, 2023 December 31, 2022 Discount rate – risk-free rate plus a market premium 9.44% 9.51% Prepayment rate - based upon loan interest rate, original term and loan type 7.27% 7.54% Loan servicing costs – annually per loan based upon loan type: Performing loans $69 - $94 $69 - $94 Delinquent loans $150 - $500 $150 - $500 Loans in foreclosure $875 - $8,000 $875 - $8,000 Escrow earnings rate – indexed to rates paid on deposit accounts with comparable average life 4.18% 4.06% Primary/secondary mortgage rate spread 105 bps 105 bps Delinquency rate 1.91% 2.33%

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	6 Months Ended
	Jun. 30, 2023
Stockholders' Equity Note [Abstract]
Accumulated Other Comprehensive Income (Loss) [Table Text Block]	A rollforward of the components of accumulated other comprehensive income (loss) is included as follows (in thousands): Unrealized Gain (Loss) on Available for Sale Securities Investment Securities Transferred from AFS Employee Benefit Plans Total Balance, Dec. 31, 2021 $ 69,775 $ — $ 2,596 $ 72,371 Net change in unrealized gain (loss) (881,577) — — (881,577) Transfer of net unrealized loss from AFS to investment securities 267,509 (267,509) — — Reclassification adjustments included in earnings: Interest revenue, Investment securities — 2,455 — 2,455 Gain on available for sale securities, net (2,125) — — (2,125) Other comprehensive loss, before income taxes (616,193) (265,054) — (881,247) Federal and state income taxes (144,215) (62,033) — (206,248) Other comprehensive loss, net of income taxes (471,978) (203,021) — (674,999) Balance, June 30, 2022 $ (402,203) $ (203,021) $ 2,596 $ (602,628) 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)

Earnings Per Share (Tables)

Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2023
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 June 30, 2023 2022 2023 2022 Numerator: Net income attributable to BOK Financial Corp. shareholders $ 151,308 $ 132,846 $ 313,676 $ 195,334 Less: Earnings allocated to participating securities 1,202 949 2,457 1,400 Numerator for basic earnings per share – income available to common shareholders 150,106 131,897 311,219 193,934 Effect of reallocating undistributed earnings of participating securities — — — — Numerator for diluted earnings per share – income available to common shareholders $ 150,106 $ 131,897 $ 311,219 $ 193,934 Denominator: Weighted average shares outstanding 66,521,728 67,938,607 66,684,603 68,105,679 Less: Participating securities included in weighted average shares outstanding 527,596 484,859 522,555 489,283 Denominator for basic earnings per common share 65,994,132 67,453,748 66,162,048 67,616,396 Dilutive effect of employee stock compensation plans — 1,424 — 1,438 Denominator for diluted earnings per common share 65,994,132 67,455,172 66,162,048 67,617,834 Basic earnings per share $ 2.27 $ 1.96 $ 4.70 $ 2.87 Diluted earnings per share $ 2.27 $ 1.96 $ 4.70 $ 2.87

Reportable Segments (Tables)

Reportable Segments (Tables)	6 Months Ended
	Jun. 30, 2023
Segment Reporting [Abstract]
Reportable Segments [Table Text Block]	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 revenue from external sources $ 299,712 $ 17,828 $ 4,415 $ 306 $ 322,261 Net interest revenue (expense) from internal sources (39,613) 95,563 44,937 (100,887) — Net interest revenue (expense) 260,099 113,391 49,352 (100,581) 322,261 Net loans charged off and provision for credit losses 6,000 1,129 (45) 9,916 17,000 Net interest revenue after provision for credit losses 254,099 112,262 49,397 (110,497) 305,261 Other operating revenue 68,828 32,277 123,043 (15,099) 209,049 Other operating expense 77,479 52,340 84,859 103,995 318,673 Net direct contribution 245,448 92,199 87,581 (229,591) 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 (loss) on repossessed assets, net 408 — — (408) — Corporate expense allocations 21,404 12,318 12,574 (46,296) — Net income (loss) before taxes 224,683 78,885 75,007 (182,938) 195,637 Federal and state income taxes 54,504 18,553 17,690 (46,746) 44,001 Net income (loss) 170,179 60,332 57,317 (136,192) 151,636 Net income attributable to non-controlling interests — — — 328 328 Net income (loss) attributable to BOK Financial Corp. shareholders $ 170,179 $ 60,332 $ 57,317 $ (136,520) $ 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 revenue from external sources $ 587,970 $ 38,974 $ 25,355 $ 22,310 $ 674,609 Net interest revenue (expense) from internal sources (60,714) 183,798 78,103 (201,187) — Net interest revenue 527,256 222,772 103,458 (178,877) 674,609 Net loans charged off and provision for credit losses 6,076 2,313 (69) 24,680 33,000 Net interest revenue after provision for credit losses 521,180 220,459 103,527 (203,557) 641,609 Other operating revenue 125,673 62,887 231,954 (33,600) 386,914 Other operating expense 150,613 102,538 166,898 204,436 624,485 Net direct contribution 496,240 180,808 168,583 (441,593) 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 (loss) on repossessed assets, net 1,267 14 — (1,281) — Corporate expense allocations 39,122 23,940 24,934 (87,996) — Net income (loss) before taxes 458,558 145,154 143,649 (343,323) 404,038 Federal and state income taxes 111,073 34,139 33,885 (89,191) 89,906 Net income (loss) 347,485 111,015 109,764 (254,132) 314,132 Net income attributable to non-controlling interests — — — 456 456 Net income (loss) attributable to BOK Financial Corp. shareholders $ 347,485 $ 111,015 $ 109,764 $ (254,588) $ 313,676 Average assets $ 28,166,923 $ 9,765,186 $ 12,309,730 $ (3,291,232) $ 46,950,607 Reportable segments reconciliation to the Consolidated Financial Statements for the three months ended June 30, 2022 is as follows (in thousands): Commercial Consumer Wealth Funds Management and Other BOK Net interest revenue from external sources $ 172,995 $ 16,784 $ 39,412 $ 44,827 $ 274,018 Net interest revenue (expense) from internal sources (6,452) 17,002 (1,665) (8,885) — Net interest revenue 166,543 33,786 37,747 35,942 274,018 Net loans charged off and provision for credit losses (1,502) 1,196 (60) 366 — Net interest revenue after provision for credit losses 168,045 32,590 37,807 35,576 274,018 Other operating revenue 61,688 30,089 86,761 (9,921) 168,617 Other operating expense 69,631 52,660 76,393 74,971 273,655 Net direct contribution 160,102 10,019 48,175 (49,316) 168,980 Gain (loss) on financial instruments, net 61 (15,860) — 15,799 — Change in fair value of mortgage servicing rights — 17,485 — (17,485) — Gain (loss) on repossessed assets, net (4,515) 93 — 4,422 — Corporate expense allocations 16,617 10,120 12,503 (39,240) — Net income before taxes 139,031 1,617 35,672 (7,340) 168,980 Federal and state income taxes 33,916 378 8,385 (6,557) 36,122 Net income 105,115 1,239 27,287 (783) 132,858 Net loss attributable to non-controlling interests — — — 12 12 Net income attributable to BOK Financial Corp. shareholders $ 105,115 $ 1,239 $ 27,287 $ (795) $ 132,846 Average assets $ 29,269,712 $ 10,338,191 $ 16,902,721 $ (9,222,090) $ 47,288,534 Reportable segments reconciliation to the Consolidated Financial Statements for the six months ended June 30, 2022 is as follows (in thousands): Commercial Consumer Wealth Funds Management and Other BOK Net interest revenue from external sources $ 320,585 $ 33,699 $ 95,643 $ 92,502 $ 542,429 Net interest revenue (expense) from internal sources (17,031) 27,294 (2,130) (8,133) — Net interest revenue 303,554 60,993 93,513 84,369 542,429 Net loans charged off and provision for credit losses 3,841 2,308 (131) (6,018) — Net interest revenue after provision for credit losses 299,713 58,685 93,644 90,387 542,429 Other operating revenue 119,115 64,050 111,779 (38,471) 256,473 Other operating expense 134,521 101,449 151,012 164,291 551,273 Net direct contribution 284,307 21,286 54,411 (112,375) 247,629 Gain (loss) on financial instruments, net (143) (73,755) — 73,898 — Change in fair value of mortgage servicing rights — 66,595 — (66,595) — Gain (loss) on repossessed assets, net (2,722) 138 — 2,584 — Corporate expense allocations 32,847 22,200 24,575 (79,622) — Net income before taxes 248,595 (7,936) 29,836 (22,866) 247,629 Federal and state income taxes 60,951 (1,858) 7,070 (13,844) 52,319 Net income 187,644 (6,078) 22,766 (9,022) 195,310 Net loss attributable to non-controlling interests — — — (24) (24) Net income attributable to BOK Financial Corp. shareholders $ 187,644 $ (6,078) $ 22,766 $ (8,998) $ 195,334 Average assets $ 29,545,278 $ 10,306,218 $ 19,101,045 $ (10,036,777) $ 48,915,764

Fees and Commissions Revenue _2

Fees and Commissions Revenue Fees and Commissions Rvenue (Tables)	6 Months Ended
	Jun. 30, 2023
Revenue from Contract with Customer [Abstract]
Disaggregation of Fees and Commissions Revenue [Table Text Block]	Fees and commissions revenue by reportable segment and primary service line is as follows for the three months ended June 30, 2023. 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 — — 25,799 — 25,799 — 25,799 Corporate trust revenue — — 7,201 — 7,201 — 7,201 Institutional trust & retirement plan services revenue — — 13,223 — 13,223 — 13,223 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. 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 — — 49,744 — 49,744 — 49,744 Corporate trust revenue — — 14,861 — 14,861 — 14,861 Institutional trust & retirement plan services revenue — — 26,058 — 26,058 — 26,058 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. Fees and commissions revenue by reportable segment and primary service line is as follows for the three months ended June 30, 2022. Commercial Consumer Wealth Management Funds Management & Other Consolidated Out of Scope 1 In Scope 2 Trading revenue $ — $ — $ 11,991 $ — $ 11,991 $ 11,991 $ — Customer hedging revenue 7,740 — 305 5,088 13,133 13,133 — Retail brokerage revenue — — 4,258 — 4,258 — 4,258 Insurance brokerage revenue — — 2,818 — 2,818 — 2,818 Investment banking revenue 7,069 — 4,774 — 11,843 6,371 5,472 Brokerage and trading revenue 14,809 — 24,146 5,088 44,043 31,495 12,548 TransFund EFT network revenue 20,367 912 (19) 2 21,262 — 21,262 Merchant services revenue 3,867 10 — — 3,877 — 3,877 Corporate card revenue 1,594 — 101 106 1,801 — 1,801 Transaction card revenue 25,828 922 82 108 26,940 — 26,940 Personal trust revenue — — 25,676 — 25,676 — 25,676 Corporate trust revenue — — 6,476 — 6,476 — 6,476 Institutional trust & retirement plan services revenue — — 12,574 — 12,574 — 12,574 Investment management services and other revenue — — 5,112 — 5,112 — 5,112 Fiduciary and asset management revenue — — 49,838 — 49,838 — 49,838 Commercial account service charge revenue 13,791 469 523 (1) 14,782 — 14,782 Overdraft fee revenue 29 6,544 21 1 6,595 — 6,595 Check card revenue — 6,013 — 2 6,015 — 6,015 Automated service charge and other deposit fee revenue 21 1,061 25 1 1,108 — 1,108 Deposit service charges and fees 13,841 14,087 569 3 28,500 — 28,500 Mortgage production revenue — (504) — — (504) (504) — Mortgage servicing revenue — 12,368 — (496) 11,872 11,872 — Mortgage banking revenue — 11,864 — (496) 11,368 11,368 — Other revenue 5,403 3,228 12,136 (8,083) 12,684 7,900 4,784 Total fees and commissions revenue $ 59,881 $ 30,101 $ 86,771 $ (3,380) $ 173,373 $ 50,763 $ 122,610 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, 2022. Commercial Consumer Wealth Management Funds Management & Other 3 Consolidated Out of Scope 1 In Scope 2 Trading revenue $ — $ — $ (42,057) $ — $ (42,057) $ (42,057) $ — Customer hedging revenue 20,719 — 1,122 2,230 24,071 24,071 — Retail brokerage revenue — — 8,868 — 8,868 — 8,868 Insurance brokerage revenue — — 6,556 — 6,556 — 6,556 Investment banking revenue 10,427 — 9,099 — 19,526 9,470 10,056 Brokerage and trading revenue 31,146 — (16,412) 2,230 16,964 (8,516) 25,480 TransFund EFT network revenue 38,520 1,798 (36) 3 40,285 — 40,285 Merchant services revenue 7,508 20 — — 7,528 — 7,528 Corporate card revenue 2,970 — 177 196 3,343 — 3,343 Transaction card revenue 48,998 1,818 141 199 51,156 — 51,156 Personal trust revenue — — 50,473 — 50,473 — 50,473 Corporate trust revenue — — 10,434 — 10,434 — 10,434 Institutional trust & retirement plan services revenue — — 25,141 — 25,141 — 25,141 Investment management services and other revenue — — 10,233 (44) 10,189 — 10,189 Fiduciary and asset management revenue — — 96,281 (44) 96,237 — 96,237 Commercial account service charge revenue 26,922 919 1,036 — 28,877 — 28,877 Overdraft fee revenue 60 12,737 44 1 12,842 — 12,842 Check card revenue — 11,558 — 2 11,560 — 11,560 Automated service charge and other deposit fee revenue 44 2,168 11 2 2,225 — 2,225 Deposit service charges and fees 27,026 27,382 1,091 5 55,504 — 55,504 Mortgage production revenue — 4,551 — — 4,551 4,551 — Mortgage servicing revenue — 24,444 — (977) 23,467 23,467 — Mortgage banking revenue — 28,995 — (977) 28,018 28,018 — Other revenue 9,675 5,883 30,693 (23,122) 23,129 15,175 7,954 Total fees and commissions revenue $ 116,845 $ 64,078 $ 111,794 $ (21,709) $ 271,008 $ 34,677 $ 236,331 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, 2023
Fair Value Disclosures [Abstract]
Fair Value Assets And Liabilities Measured On A Recurring Basis [Table Text Block]	The fair value of financial assets and liabilities measured on a recurring basis was as follows as of June 30, 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 $ 46,994 $ 4,963 $ 42,031 $ — Residential agency mortgage-backed securities 5,334,372 — 5,334,372 — Municipal securities 49,595 — 49,595 — Other trading securities 11,403 — 11,403 — Total trading securities 5,442,364 4,963 5,437,401 — Available for sale securities: U.S. Treasury 901 901 — — Municipal securities 491,715 — 491,715 — Residential agency mortgage-backed securities 6,114,202 — 6,114,202 — Residential non-agency mortgage-backed securities 699,178 — 699,178 — Commercial agency mortgage-backed securities 4,632,054 — 4,632,054 — Other debt securities 473 — — 473 Total available for sale securities 11,938,523 901 11,937,149 473 Fair value option securities — Residential agency mortgage-backed securities 212,321 — 212,321 — Residential mortgage loans held for sale 1 94,820 — 87,572 7,248 Mortgage servicing rights 2 304,722 — — 304,722 Derivative contracts, net of cash collateral 3 353,037 2,506 350,531 — Liabilities: Derivative contracts, net of cash collateral 3 550,653 4 550,649 — 1 Residential mortgage loans held for sale measured at fair value on a recurring basis using significant unobservable inputs (Level 3) consist of residential mortgage loans intended for sale to U.S. government agencies that fail to meet conforming standards and are valued at 78.99% 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, 2022 (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 $ 9,823 $ 4,970 $ 4,853 $ — Residential agency mortgage-backed securities 4,406,848 — 4,406,848 — Municipal securities 21,484 — 21,484 — Other trading securities 26,006 — 26,006 — Total trading securities 4,464,161 4,970 4,459,191 — Available for sale securities: U.S. Treasury 898 898 — — Municipal securities 624,500 — 624,500 — Residential agency mortgage-backed securities 5,814,496 — 5,814,496 — Residential non-agency mortgage-backed securities 577,576 — 577,576 — Commercial agency mortgage-backed securities 4,475,917 — 4,475,917 — Other debt securities 473 — — 473 Total available for sale securities 11,493,860 898 11,492,489 473 Fair value option securities — Residential agency mortgage-backed securities 296,590 — 296,590 — Residential mortgage loans held for sale 1 75,272 — 68,054 7,218 Mortgage servicing rights 2 277,608 — — 277,608 Derivative contracts, net of cash collateral 3 880,343 2,110 878,233 — Liabilities: Derivative contracts, net of cash collateral 3 554,900 16 554,884 — 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 77.55% 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, 2023 for which the fair value was adjusted during the six months ended June 30, 2023: 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 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, 2022 for which the fair value was adjusted during the six months ended June 30, 2022: Fair Value Adjustments for the Carrying Value at June 30, 2022 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 $ — $ 99 $ 126 $ — $ — $ 478 $ — Real estate and other repossessed assets — 1,412 1,699 — (5,811) — (5,705)
Fair Value Inputs, Fair Value Measured On a Nonrecurring Basis, Quantitative Information [Table Text Block]	A summary of quantitative information about Non-recurring Fair Value Measurements based on Significant Unobservable Inputs (Level 3) as of June 30, 2023 follows (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. A summary of quantitative information about Non-recurring Fair Value Measurements based on Significant Unobservable Inputs (Level 3) as of June 30, 2022 follows (in thousands): Fair Value Valuation Technique(s) Unobservable Input Range Nonaccruing loans $ 126 Discounted cash flows Management knowledge of industry and non-real estate collateral including, but not limited to, recoverable oil and gas reserves, forward-looking commodity prices, estimated operating costs 25% - 25% (25%) 1 Real estate and other repossessed assets 1,699 Discounted cash flows Management knowledge of industry and non-real estate collateral N/A 1 Represents fair value as a percentage of the unpaid principal balance.
Fair Value of Financial Instruments [Table Text Block]	The following table presents the carrying values and estimated fair values of all financial instruments, including those financial assets and liabilities that are not measured and reported at fair value on a recurring basis or are measured at fair value on a non-recurring basis as of June 30, 2023 (dollars 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 $ 875,714 $ 875,714 $ 875,714 $ — $ — Interest-bearing cash and cash equivalents 571,616 571,616 571,616 — — Trading securities: U.S. government securities 46,994 46,994 4,963 42,031 — Residential agency mortgage-backed securities 5,334,372 5,334,372 — 5,334,372 — Municipal securities 49,595 49,595 — 49,595 — Other trading securities 11,403 11,403 — 11,403 — Total trading securities 5,442,364 5,442,364 4,963 5,437,401 — Investment securities: Municipal securities 136,803 141,587 — 17,567 124,020 Residential agency mortgage-backed securities 2,205,685 2,014,427 — 2,014,427 — Commercial agency mortgage-backed securities 15,760 14,636 — 14,636 — Other debt securities 16,288 14,734 — 14,734 — Total investment securities 2,374,536 2,185,384 — 2,061,364 124,020 Allowance for credit losses (465) — — — — Investment securities, net of allowance 2,374,071 2,185,384 — 2,061,364 124,020 Available for sale securities: U.S. Treasury 901 901 901 — — Municipal securities 491,715 491,715 — 491,715 — Residential agency mortgage-backed securities 6,114,202 6,114,202 — 6,114,202 — Residential non-agency mortgage-backed securities 699,178 699,178 — 699,178 — Commercial agency mortgage-backed securities 4,632,054 4,632,054 — 4,632,054 — Other debt securities 473 473 — — 473 Total available for sale securities 11,938,523 11,938,523 901 11,937,149 473 Fair value option securities — Residential agency mortgage-backed securities 212,321 212,321 — 212,321 — Residential mortgage loans held for sale 94,820 94,820 — 87,572 7,248 Loans: Commercial 14,534,516 14,428,246 — — 14,428,246 Commercial real estate 4,970,801 4,839,799 — — 4,839,799 Loans to individuals 3,732,342 3,578,079 — — 3,578,079 Total loans 23,237,659 22,846,124 — — 22,846,124 Allowance for loan losses (262,714) — — — — Loans, net of allowance 22,974,945 22,846,124 — — 22,846,124 Mortgage servicing rights 304,722 304,722 — — 304,722 Derivative instruments with positive fair value, net of cash collateral 353,037 353,037 2,506 350,531 — Deposits with no stated maturity 30,588,466 30,588,466 — — 30,588,466 Time deposits 2,706,377 2,672,789 — — 2,672,789 Other borrowed funds 9,223,920 9,221,872 — — 9,221,872 Subordinated debentures 131,154 112,501 — 112,501 — Derivative instruments with negative fair value, net of cash collateral 550,653 550,653 4 550,649 — The following table presents the carrying values and estimated fair values of all financial instruments, including those financial assets and liabilities that are not measured and reported at fair value on a recurring basis or are measured at fair value on a non-recurring basis as of December 31, 2022 (dollars 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 $ 943,810 $ 943,810 $ 943,810 $ — $ — Interest-bearing cash and cash equivalents 457,906 457,906 457,906 — — Trading securities: U.S. government securities 9,823 9,823 4,970 4,853 — Residential agency mortgage-backed securities 4,406,848 4,406,848 — 4,406,848 — Municipal securities 21,484 21,484 — 21,484 — Other trading securities 26,006 26,006 — 26,006 — Total trading securities 4,464,161 4,464,161 4,970 4,459,191 — Investment securities: Municipal securities 170,629 176,621 — 38,106 138,515 Residential agency mortgage-backed securities 2,315,219 2,143,360 — 2,143,360 — Commercial agency mortgage-backed securities 15,609 14,588 — 14,588 — Other debt securities 12,788 12,199 — 12,199 — Total investment securities 2,514,245 2,346,768 — 2,208,253 138,515 Allowance for credit losses (558) — — — — Investment securities, net of allowance 2,513,687 2,346,768 — 2,208,253 138,515 Available for sale securities: U.S. Treasury 898 898 898 — — Municipal securities 624,500 624,500 — 624,500 — Residential agency mortgage-backed securities 5,814,496 5,814,496 — 5,814,496 — Residential non-agency mortgage-backed securities 577,576 577,576 — 577,576 — Commercial agency mortgage-backed securities 4,475,917 4,475,917 — 4,475,917 — Other debt securities 473 473 — — 473 Total available for sale securities 11,493,860 11,493,860 898 11,492,489 473 Fair value option securities — Residential agency mortgage-backed securities 296,590 296,590 — 296,590 — Residential mortgage loans held for sale 75,272 75,272 — 68,054 7,218 Loans: Commercial 14,212,499 13,905,765 — — 13,905,765 Commercial real estate 4,606,777 4,454,048 — — 4,454,048 Loans to individuals 3,737,874 3,531,410 — — 3,531,410 Total loans 22,557,150 21,891,223 — — 21,891,223 Allowance for loan losses (235,704) — — — — Loans, net of allowance 22,321,446 21,891,223 — — 21,891,223 Mortgage servicing rights 277,608 277,608 — — 277,608 Derivative instruments with positive fair value, net of cash collateral 880,343 880,343 2,110 878,233 — Deposits with no stated maturity 33,018,863 33,018,863 — — 33,018,863 Time deposits 1,461,842 1,431,245 — — 1,431,245 Other borrowed funds 7,007,285 7,005,305 — — 7,005,305 Subordinated debentures 131,205 121,497 — 121,497 — Derivative instruments with negative fair value, net of cash collateral 554,900 554,900 16 554,884 —

Significant Accounting Polici_3

Significant Accounting Policies Loans and Allowance for Credit Losses (Details)	6 Months Ended
	Jun. 30, 2023
Loans and Allowance for Credit Losses [Abstract]
Loans, Number of Days Past Due for a Non-Risk Graded Loan to be Placed on Nonaccruing Status	90 days
Loans, Number of Days After Notification of Chapter 7 Bankruptcy Non-Risk Graded Loan is Placed on Nonaccruing Status	60 days
Loans and Allowances for Credit Losses, Minimum No of Days After Which Past Due Non-Risk Graded Loans Are Charged Off	60 days
Loans and Allowances for Credit Losses, Maximum No of Days After Which Past Due Non-Risk Graded Loans Are Charged Off	180 days
Loans, Number of Days After Notification of Chapter 7 Bankruptcy Non-Risk Graded Loan is Charged Off	60 days

Trading Securities (Details)

Trading Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Schedule of Trading Securities [Line Items]
Trading Securities, Fair Value	$ 5,442,364	$ 4,464,161
Trading Securities, Net Unrealized Gain (Loss)	(33,277)	(323)
U.S. government securities [Member]
Schedule of Trading Securities [Line Items]
Trading Securities, Fair Value	46,994	9,823
Trading Securities, Net Unrealized Gain (Loss)	(13)	(16)
Residential agency mortgage-backed securities [Member]
Schedule of Trading Securities [Line Items]
Trading Securities, Fair Value	5,334,372	4,406,848
Trading Securities, Net Unrealized Gain (Loss)	(33,275)	4
Municipal securities [Member]
Schedule of Trading Securities [Line Items]
Trading Securities, Fair Value	49,595	21,484
Trading Securities, Net Unrealized Gain (Loss)	140	(136)
Other trading securities [Member]
Schedule of Trading Securities [Line Items]
Trading Securities, Fair Value	11,403	26,006
Trading Securities, Net Unrealized Gain (Loss)	$ (129)	$ (175)

Investment (Held-to-Maturity) S

Investment (Held-to-Maturity) Securities (Details) $ in Thousands		3 Months Ended		6 Months Ended		12 Months Ended
		Jun. 30, 2023 USD ($)		Jun. 30, 2023 USD ($)		Dec. 31, 2022 USD ($)
Schedule of Investment (Held-to-Maturity) Securities [Line Items]
Investment Securities, Gross Amortized Cost		$ 2,567,448		$ 2,567,448		$ 2,739,241
Investment Securities, Gross Carrying Value		2,374,536	[1]	2,374,536	[1]	2,514,245	[2]
Investment securities, Allowance for Credit Loss		(465)	[1]	(465)	[1]	(558)	[2]
Investment Securities, Amortized Cost, After Allowance for Credit Loss		2,566,983		2,566,983		2,738,683
Investment Securities, Carrying Value, after Allowance for Credit Loss		2,374,071	[1]	2,374,071	[1]	2,513,687	[2]
Investment Securities, Fair Value		2,185,384		2,185,384		2,346,768
Investment Securities, Gross Unrealized Gain		5,296		5,296		6,611
Investment Securities, Gross Unrealized Loss		$ (194,448)		(194,448)		(174,088)
Debt Securities, Net Unrealized Loss Remaining in AOCI included in Carrying Value for AFS Securities Transferred to Investment Securities				$ (193,000)		$ (225,000)
Investment Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]
Investment Securities, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		141		141		143
Investment Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Investment Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 27,513		$ 27,513		$ 2,184,167
Investment Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		2,032,359		2,032,359		801
Investment Securities, Continuous Unrealized Loss Position, Fair Value		2,059,872		2,059,872		2,184,968
Investment Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]
Investment Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		1,743		1,743		174,012
Investment Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		192,705		192,705		76
Investment Securities, Continuous Unrealized Loss Position, Accumulated Loss		194,448		194,448		174,088
Fixed Maturity Securities [Member]
Investment Securities, Debt Maturities, Net Carrying Value [Abstract]
Investment Securities, Debt Maturities, Less than One Year, Net Carrying Value		26,633		26,633
Investment Securities, Debt Maturities, One to Five Years, Net Carrying Value		100,361		100,361
Investment Securities, Debt Maturities, Six to Ten Years, Net Carrying Value		41,844		41,844
Investment Securities, Debt Maturities, Over Ten Years, Net Carrying Value		13		13
Investment Securities, Debt Maturities, Single Maturity Date, Net Carrying Value		168,851		168,851
Investment Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]
Investment Securities, Debt Maturities, Less Than One Year, Fair Value		26,772		26,772
Investment Securities, Debt Maturities, One to Five Years, Fair Value		104,295		104,295
Investment Securities, Debt Maturities, Six to Ten Years, Fair Value		39,877		39,877
Investment Securities, Debt Maturities, Over Ten Years, Fair Value		13		13
Investment Securities, Debt Maturities, Single Maturity Date, Fair Value		$ 170,957		$ 170,957
Investment Securities, Debt Maturities, Weighted Average Maturity	[3]	3.59		3.59
Municipal securities [Member]
Schedule of Investment (Held-to-Maturity) Securities [Line Items]
Investment Securities, Gross Amortized Cost		$ 136,803		$ 136,803		170,629
Investment Securities, Gross Carrying Value		136,803	[1]	136,803	[1]	170,629	[2]
Investment Securities, Fair Value		141,587		141,587		176,621
Investment Securities, Gross Unrealized Gain		5,168		5,168		6,456
Investment Securities, Gross Unrealized Loss		$ (384)		$ (384)		$ (464)
Investment Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]
Investment Securities, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		20		20		22
Investment Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Investment Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 16,740		$ 16,740		$ 18,037
Investment Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		6,484		6,484		544
Investment Securities, Continuous Unrealized Loss Position, Fair Value		23,224		23,224		18,581
Investment Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]
Investment Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		79		79		406
Investment Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		305		305		58
Investment Securities, Continuous Unrealized Loss Position, Accumulated Loss		384		384		464
Residential agency mortgage-backed securities [Member]
Schedule of Investment (Held-to-Maturity) Securities [Line Items]
Investment Securities, Gross Amortized Cost		2,397,098		2,397,098		2,538,565
Investment Securities, Gross Carrying Value		2,205,685	[1]	2,205,685	[1]	2,315,219	[2]
Investment Securities, Fair Value		2,014,427		2,014,427		2,143,360
Investment Securities, Gross Unrealized Gain		128		128		155
Investment Securities, Gross Unrealized Loss		(191,386)		(191,386)		$ (172,014)
Investment Securities, Debt Maturities, Net Carrying Value [Abstract]
Investment Securities, Debt Maturities, without Single Maturity Date, Net Carrying Value	[4]	2,205,685		2,205,685
Investment Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]
Investment Securities, Debt Maturities, without Single Maturity Date, Fair Value		$ 2,014,427		$ 2,014,427
Investment Securities, Debt Maturities, Average Expected Life of Mortgage-backed Securities		5 years 3 months 18 days
Investment Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]
Investment Securities, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		116		116		116
Investment Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Investment Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 2,309		$ 2,309		$ 2,142,114
Investment Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		2,010,981		2,010,981		0
Investment Securities, Continuous Unrealized Loss Position, Fair Value		2,013,290		2,013,290		2,142,114
Investment Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]
Investment Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		128		128		172,014
Investment Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		191,258		191,258		0
Investment Securities, Continuous Unrealized Loss Position, Accumulated Loss		191,386		191,386		172,014
Commercial agency mortgage-backed securities [Member]
Schedule of Investment (Held-to-Maturity) Securities [Line Items]
Investment Securities, Gross Amortized Cost		17,259		17,259		17,259
Investment Securities, Gross Carrying Value		15,760	[1]	15,760	[1]	15,609	[2]
Investment Securities, Fair Value		14,636		14,636		14,588
Investment Securities, Gross Unrealized Gain		0		0		0
Investment Securities, Gross Unrealized Loss		$ (1,124)		$ (1,124)		$ (1,021)
Investment Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]
Investment Securities, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		2		2		2
Investment Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Investment Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 0		$ 0		$ 14,588
Investment Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		14,637		14,637		0
Investment Securities, Continuous Unrealized Loss Position, Fair Value		14,637		14,637		14,588
Investment Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]
Investment Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		0		0		1,021
Investment Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		1,124		1,124		0
Investment Securities, Continuous Unrealized Loss Position, Accumulated Loss		1,124		1,124		1,021
Other debt securities [Member]
Schedule of Investment (Held-to-Maturity) Securities [Line Items]
Investment Securities, Gross Amortized Cost		16,288		16,288		12,788
Investment Securities, Gross Carrying Value		16,288	[1]	16,288	[1]	12,788	[2]
Investment Securities, Fair Value		14,734		14,734		12,199
Investment Securities, Gross Unrealized Gain		0		0		0
Investment Securities, Gross Unrealized Loss		$ (1,554)		$ (1,554)		$ (589)
Investment Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]
Investment Securities, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		3		3		3
Investment Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Investment Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 8,464		$ 8,464		$ 9,428
Investment Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		257		257		257
Investment Securities, Continuous Unrealized Loss Position, Fair Value		8,721		8,721		9,685
Investment Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]
Investment Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		1,536		1,536		571
Investment Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		18		18		18
Investment Securities, Continuous Unrealized Loss Position, Accumulated Loss		$ 1,554		$ 1,554		$ 589
[1]Carrying value includes $193 million of net unrealized loss which remains in Accumulated other comprehensive income ("AOCI") in the Consolidated Balance Sheets related to certain securities transferred during the second quarter of 2022 from the Available for Sale securities portfolio to the Investment securities portfolio.[2]Carrying value includes $225 million of net unrealized loss which remains in Accumulated other comprehensive income ("AOCI") in the Consolidated Balance Sheets related to certain securities transferred during the second quarter of 2022 from the Available for Sale securities portfolio to the Investment securities portfolio.[3]Expected maturities may differ from contractual maturities, because borrowers may have the right to call or prepay obligations with or without penalty.[4]The average expected lives of residential mortgage-backed securities were 5.3 years based upon current prepayment assumptions.

Available for Sale Securities (

Available for Sale Securities (Details) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost		$ 12,837,429		$ 12,837,429		$ 12,359,413
Available-for-sale Securities, Fair Value		11,938,523		11,938,523		11,493,860
Available-for-sale Securities, Gross Unrealized Gain		11,866		11,866		28,661
Available-for-sale Securities, Gross Unrealized Loss		(910,772)		(910,772)		$ (894,214)
Debt Securities, Available-for-sale, Realized Gain (Loss) [Abstract]
Available-for-sale Securities, Proceeds		135,489	$ 156,116	135,489	$ 211,301
Available-for-sale Securities, Gross realized gains		703	1,461	703	3,394
Available-for-sale Securities, Gross realized losses		(3,713)	(273)	(3,713)	(1,269)
Available-for-sale Securities, Related federal and state income tax expense (benefit)		$ (708)	$ 278	$ (708)	$ 497
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		1,247		1,247		1,153
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 4,165,347		$ 4,165,347		$ 6,173,710
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		108,238		108,238		376,598
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		7,391,776		7,391,776		3,829,168
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		802,534		802,534		517,616
Debt Securities, Available-for-sale, Unrealized Loss Position		11,557,123		11,557,123		10,002,878
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss		910,772		910,772		894,214
Asset Pledged as Collateral with Right
Debt Securities, Available-for-sale, Realized Gain (Loss) [Abstract]
Pledged Securities		14,600,000		14,600,000		11,200,000
Fixed Maturity Securities [Member]
Debt Securities, Available-for-sale, Maturity, Amortized Cost, Rolling Maturity [Abstract]
Available-for-sale Securities, Debt Maturities, Less than One Year, Amortized Cost Basis		180,223		180,223
Available-for-sale Securities, Debt Maturities, One to Five Years, Amortized Cost Basis		2,894,432		2,894,432
Available-for-sale Securities, Debt Maturities, Six To Ten Years, Amortized Cost Basis		1,987,608		1,987,608
Available-for-sale Securities, Debt Maturities, Over Ten Years, Amortized Cost Basis		535,891		535,891
Available-for-sale Securities, Debt Maturities, Allocated and Single Maturity Date, Amortized Cost		5,598,154		5,598,154
Debt Securities, Available-for-sale, Maturity, Fair Value, Rolling Maturity [Abstract]
Available-for-sale Securities, Debt Maturities, Less than One Year, Fair Value		178,499		178,499
Available-for-sale Securities, Debt Maturities, One to Five Years, Fair Value		2,675,529		2,675,529
Available-for-sale Securities, Debt Maturities, Six to Ten Years, Fair Value		1,769,950		1,769,950
Available-for-sale Securities, Debt Maturities, Over Ten Years, Fair Value		501,165		501,165
Available-for-sale Securities, Debt Maturities, Allocated and Single Maturity Date, Fair Value		$ 5,125,143		$ 5,125,143
Available-for-sale Securities, Debt Maturities, Weighted Average Maturity	[1]	5.71		5.71
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		901		901		898
Available-for-sale Securities, Gross Unrealized Gain		0		0		0
Available-for-sale Securities, Gross Unrealized Loss		$ (99)		$ (99)		$ (102)
Debt Securities, Available-for-sale, Realized Gain (Loss) [Abstract]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		1		1		1
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 0		$ 0		$ 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		0		0		0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		901		901		899
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		99		99		102
Debt Securities, Available-for-sale, Unrealized Loss Position		901		901		899
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss		99		99		102
Municipal securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost		547,510		547,510		687,875
Available-for-sale Securities, Fair Value		491,715		491,715		624,500
Available-for-sale Securities, Gross Unrealized Gain		0		0		321
Available-for-sale Securities, Gross Unrealized Loss		$ (55,795)		$ (55,795)		$ (63,696)
Debt Securities, Available-for-sale, Realized Gain (Loss) [Abstract]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		192		192		227
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 35,516		$ 35,516		$ 146,634
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		1,022		1,022		5,301
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		456,199		456,199		428,248
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		54,773		54,773		58,395
Debt Securities, Available-for-sale, Unrealized Loss Position		491,715		491,715		574,882
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss		55,795		55,795		63,696
Commercial agency mortgage-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost		5,049,144		5,049,144		4,892,257
Available-for-sale Securities, Fair Value		4,632,054		4,632,054		4,475,917
Available-for-sale Securities, Gross Unrealized Gain		556		556		3,479
Available-for-sale Securities, Gross Unrealized Loss		$ (417,646)		$ (417,646)		$ (419,819)
Debt Securities, Available-for-sale, Realized Gain (Loss) [Abstract]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		302		302		285
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 998,353		$ 998,353		$ 1,647,778
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		23,530		23,530		63,701
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		3,528,331		3,528,331		2,535,816
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		394,116		394,116		356,118
Debt Securities, Available-for-sale, Unrealized Loss Position		4,526,684		4,526,684		4,183,594
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss		417,646		417,646		419,819
Other debt securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost		500		500		500
Available-for-sale Securities, Fair Value		473		473		473
Available-for-sale Securities, Gross Unrealized Gain		0		0		0
Available-for-sale Securities, Gross Unrealized Loss		$ (27)		$ (27)		$ (27)
Debt Securities, Available-for-sale, Realized Gain (Loss) [Abstract]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		1		1		1
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 0		$ 0		$ 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		0		0		0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		473		473		473
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		27		27		27
Debt Securities, Available-for-sale, Unrealized Loss Position		473		473		473
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss		27		27		27
Residential Mortgage Backed Securities [Member]
Debt Securities, Available-for-sale, Maturity, Amortized Cost, Rolling Maturity [Abstract]
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Amortized Cost	[2]	7,239,275		7,239,275
Debt Securities, Available-for-sale, Maturity, Fair Value, Rolling Maturity [Abstract]
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value		$ 6,813,380		6,813,380
Available-for-sale Securities, Debt Maturities, Average Expected Life of Mortgage-backed Securities		4 years 6 months
Residential agency mortgage-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost		$ 6,492,794		6,492,794		6,161,358
Available-for-sale Securities, Fair Value		6,114,202		6,114,202		5,814,496
Available-for-sale Securities, Gross Unrealized Gain		852		852		13,085
Available-for-sale Securities, Gross Unrealized Loss		$ (379,444)		$ (379,444)		$ (359,947)
Debt Securities, Available-for-sale, Realized Gain (Loss) [Abstract]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		716		716		613
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 2,853,011		$ 2,853,011		$ 3,879,582
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		74,530		74,530		256,973
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		3,035,935		3,035,935		863,732
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		304,914		304,914		102,974
Debt Securities, Available-for-sale, Unrealized Loss Position		5,888,946		5,888,946		4,743,314
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss		379,444		379,444		359,947
Residential non-agency mortgage-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost		746,481		746,481		616,423
Available-for-sale Securities, Fair Value		699,178		699,178		577,576
Available-for-sale Securities, Gross Unrealized Gain		10,458		10,458		11,776
Available-for-sale Securities, Gross Unrealized Loss		$ (57,761)		$ (57,761)		$ (50,623)
Debt Securities, Available-for-sale, Realized Gain (Loss) [Abstract]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		35		35		26
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 278,467		$ 278,467		$ 499,716
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		9,156		9,156		50,623
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		369,937		369,937		0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		48,605		48,605		0
Debt Securities, Available-for-sale, Unrealized Loss Position		648,404		648,404		499,716
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss		$ 57,761		$ 57,761		$ 50,623
[1]Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without penalty.[2]The average expected lives of residential mortgage-backed securities were 4.5 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, 2023 USD ($)	Dec. 31, 2022 USD ($)
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	1,247	1,153
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 4,165,347	$ 6,173,710
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	7,391,776	3,829,168
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	11,557,123	10,002,878
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	108,238	376,598
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	802,534	517,616
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 910,772	$ 894,214
U.S. Treasury [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	1	1
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 0	$ 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	901	899
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	901	899
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	99	102
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 99	$ 102
Municipal securities [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	192	227
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 35,516	$ 146,634
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	456,199	428,248
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	491,715	574,882
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	1,022	5,301
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	54,773	58,395
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 55,795	$ 63,696
Residential agency mortgage-backed securities [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	716	613
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 2,853,011	$ 3,879,582
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	3,035,935	863,732
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	5,888,946	4,743,314
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	74,530	256,973
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	304,914	102,974
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 379,444	$ 359,947
Residential non-agency mortgage-backed securities [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	35	26
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 278,467	$ 499,716
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	369,937	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	648,404	499,716
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	9,156	50,623
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	48,605	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 57,761	$ 50,623
Commercial agency mortgage-backed securities [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	302	285
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 998,353	$ 1,647,778
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	3,528,331	2,535,816
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	4,526,684	4,183,594
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	23,530	63,701
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	394,116	356,118
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 417,646	$ 419,819
Other debt securities [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	1	1
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 0	$ 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	473	473
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	473	473
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	27	27
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 27	$ 27

Securities Fair Value Option Se

Securities Fair Value Option Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Fair Value Option Securities [Line Items]
Fair value option securities, Fair Value	$ 212,321	$ 296,590
Residential agency mortgage-backed securities [Member]
Fair Value Option Securities [Line Items]
Fair value option securities, Fair Value	212,321	296,590
Fair value option securities, Net Unrealized Gain (Loss)	$ (2,492)	$ 338

Derivatives, Fair Value of Deri

Derivatives, Fair Value of Derivatives Contracts (Details) - USD ($) $ in Thousands		Jun. 30, 2023		Dec. 31, 2022
Derivative Assets, Fair Value, Net [Abstract]
Derviative contracts, net of cash collateral, Assets, Fair value		$ 353,037		$ 880,343
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Fair Value, Net of Cash Collateral		550,653		554,900
Not Designated as Hedging Instrument [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional		35,763,096	[1]	28,273,268	[2]
Derivative Liabilities, Notional		31,679,977	[1]	25,778,851	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value		1,261,267		1,736,280
Derivative Assets, Netting Adjustments		(639,061)		(669,203)
Derivative Assets, Net Fair Value Before Cash Collateral		622,206		1,067,077
Derivative Assets, Cash Collateral		(269,169)		(186,734)
Derviative contracts, net of cash collateral, Assets, Fair value		353,037		880,343
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value		1,214,700		1,708,852
Derivative Liabilities, Netting Adjustments		(639,061)		(669,203)
Derivative Liabilities, Net Fair Value Before Cash Collateral		575,639		1,039,649
Derivative Liabilities, Cash Collateral		(24,986)		(484,749)
Derivative Liabilities, Fair Value, Net of Cash Collateral		550,653		554,900
Not Designated as Hedging Instrument [Member] | Total customer risk management programs
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional		11,007,232	[1]	10,788,231	[2]
Derivative Liabilities, Notional		11,004,117	[1]	11,561,139	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value		1,125,834		1,607,870
Derivative Assets, Netting Adjustments		(587,545)		(594,543)
Derivative Assets, Net Fair Value Before Cash Collateral		538,289		1,013,327
Derivative Assets, Cash Collateral		(269,016)		(182,088)
Derviative contracts, net of cash collateral, Assets, Fair value		269,273		831,239
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value		1,114,013		1,612,300
Derivative Liabilities, Netting Adjustments		(587,545)		(594,543)
Derivative Liabilities, Net Fair Value Before Cash Collateral		526,468		1,017,757
Derivative Liabilities, Cash Collateral		(23,427)		(484,326)
Derivative Liabilities, Fair Value, Net of Cash Collateral		503,041		533,431
Not Designated as Hedging Instrument [Member] | Interest rate contracts [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional		2,667,177	[1]	2,629,318	[2]
Derivative Liabilities, Notional	[1]	2,667,177		2,629,122
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value		150,410		158,825
Derivative Assets, Netting Adjustments		0		0
Derivative Assets, Net Fair Value Before Cash Collateral		150,410		158,825
Derivative Assets, Cash Collateral		(146,700)		(114,955)
Derviative contracts, net of cash collateral, Assets, Fair value		3,710		43,870
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value		150,412		158,816
Derivative Liabilities, Netting Adjustments		0		0
Derivative Liabilities, Net Fair Value Before Cash Collateral		150,412		158,816
Derivative Liabilities, Cash Collateral		0		0
Derivative Liabilities, Fair Value, Net of Cash Collateral		150,412		158,816
Not Designated as Hedging Instrument [Member] | Energy contracts [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional		8,269,088	[1]	7,918,020	[2]
Derivative Liabilities, Notional		8,266,679	[1]	8,696,060	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value		914,855		1,232,283
Derivative Assets, Netting Adjustments		(587,545)		(594,543)
Derivative Assets, Net Fair Value Before Cash Collateral		327,310		637,740
Derivative Assets, Cash Collateral		(120,398)		(67,024)
Derviative contracts, net of cash collateral, Assets, Fair value		206,912		570,716
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value		903,909		1,242,058
Derivative Liabilities, Netting Adjustments		(587,545)		(594,543)
Derivative Liabilities, Net Fair Value Before Cash Collateral		316,364		647,515
Derivative Liabilities, Cash Collateral		(23,427)		(484,319)
Derivative Liabilities, Fair Value, Net of Cash Collateral		292,937		163,196
Not Designated as Hedging Instrument [Member] | Foreign exchange contracts [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional		62,860	[1]	219,791	[2]
Derivative Liabilities, Notional		62,154	[1]	214,855	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value		60,509		216,569
Derivative Assets, Netting Adjustments		0		0
Derivative Assets, Net Fair Value Before Cash Collateral		60,509		216,569
Derivative Assets, Cash Collateral		(1,862)		0
Derviative contracts, net of cash collateral, Assets, Fair value		58,647		216,569
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value		59,632		211,233
Derivative Liabilities, Netting Adjustments		0		0
Derivative Liabilities, Net Fair Value Before Cash Collateral		59,632		211,233
Derivative Liabilities, Cash Collateral		0		(7)
Derivative Liabilities, Fair Value, Net of Cash Collateral		59,632		211,226
Not Designated as Hedging Instrument [Member] | Equity option contracts [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional		8,107	[1]	21,102	[2]
Derivative Liabilities, Notional		8,107	[1]	21,102	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value		60		193
Derivative Assets, Netting Adjustments		0		0
Derivative Assets, Net Fair Value Before Cash Collateral		60		193
Derivative Assets, Cash Collateral		(56)		(109)
Derviative contracts, net of cash collateral, Assets, Fair value		4		84
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value		60		193
Derivative Liabilities, Netting Adjustments		0		0
Derivative Liabilities, Net Fair Value Before Cash Collateral		60		193
Derivative Liabilities, Cash Collateral		0		0
Derivative Liabilities, Fair Value, Net of Cash Collateral		60		193
Not Designated as Hedging Instrument [Member] | Trading [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional		24,565,864	[1]	17,400,037	[2]
Derivative Liabilities, Notional		20,340,860	[1]	14,038,906	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value		133,391		126,910
Derivative Assets, Netting Adjustments		(51,516)		(74,647)
Derivative Assets, Net Fair Value Before Cash Collateral		81,875		52,263
Derivative Assets, Cash Collateral		(153)		(4,646)
Derviative contracts, net of cash collateral, Assets, Fair value		81,722		47,617
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value		96,506		94,958
Derivative Liabilities, Netting Adjustments		(51,516)		(74,647)
Derivative Liabilities, Net Fair Value Before Cash Collateral		44,990		20,311
Derivative Liabilities, Cash Collateral		(1,559)		(423)
Derivative Liabilities, Fair Value, Net of Cash Collateral		43,431		19,888
Not Designated as Hedging Instrument [Member] | Internal risk management programs [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional		190,000	[1]	85,000	[2]
Derivative Liabilities, Notional		335,000	[1]	178,806	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value		2,042		1,500
Derivative Assets, Netting Adjustments		0		(13)
Derivative Assets, Net Fair Value Before Cash Collateral		2,042		1,487
Derivative Assets, Cash Collateral		0		0
Derviative contracts, net of cash collateral, Assets, Fair value		2,042		1,487
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value		4,181		1,594
Derivative Liabilities, Netting Adjustments		0		(13)
Derivative Liabilities, Net Fair Value Before Cash Collateral		4,181		1,581
Derivative Liabilities, Cash Collateral		0		0
Derivative Liabilities, Fair Value, Net of Cash Collateral		$ 4,181		$ 1,581
[1]Notional amounts for commodity contracts are converted into dollar-equivalent amounts based on dollar prices at the inception of the contract.[2]Notional amounts for commodity contracts are converted into dollar-equivalent amounts based on dollar prices at the inception of the contract.

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, 2023		Jun. 30, 2022		Jun. 30, 2023		Jun. 30, 2022
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract]
Brokergage and Trading Revenue	$ 77,814		$ (2,243)		$ 23,075		$ 39,769
Gain (Loss) on Derivatives, Net	(8,159)		(13,569)		(9,503)		(60,550)
Total customer risk management programs
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract]
Brokergage and Trading Revenue	13,642		13,133		21,996		24,071
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	2,339		939		4,109		7,281
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	11,250		12,036		17,803		16,484
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	53		158		84		306
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	64,172	[1]	(15,376)	[1]	1,079	[2]	15,698	[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	$ (8,159)		$ (13,569)		$ (9,503)		$ (60,550)
[1]Represents changes in fair value of to-be-announced securities and other derivative instruments held to mitigate market risk of trading securities portfolio, which is offset by changes in fair value of trading securities also included in Brokerage and Trading Revenue in the Consolidated Statements of Earnings.[2]Represents changes in fair value of to-be-announced securities and other derivative instruments held to mitigate market risk of trading securities portfolio, which is offset by changes in fair value of trading securities also included in Brokerage and Trading Revenue in the Consolidated Statements of Earnings

Loans and Allowance for Credit

Loans and Allowance for Credit Losses, Loans by Portfolio Type (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Loan receivables disclosure [Abstract]
Loans, fixed rate of interest	$ 6,504,941	$ 6,366,303
Loans, variable rate of interest	16,600,467	16,069,050
Loans, non-accrual	132,251	121,797
Total	23,237,659	22,557,150
Credit Commitments [Abstract]
Outstanding commitments to extend credit	15,000,000
Outstanding standby letters of credit	722,000
Commercial [Member]
Loan receivables disclosure [Abstract]
Loans, fixed rate of interest	3,492,786	3,392,422
Loans, variable rate of interest	10,968,453	10,759,780
Loans, non-accrual	73,277	60,297
Total	14,534,516	14,212,499
Commercial real estate [Member]
Loan receivables disclosure [Abstract]
Loans, fixed rate of interest	878,947	874,716
Loans, variable rate of interest	4,074,459	3,715,491
Loans, non-accrual	17,395	16,570
Total	4,970,801	4,606,777
Loans to individuals [Member]
Loan receivables disclosure [Abstract]
Loans, fixed rate of interest	2,133,208	2,099,165
Loans, variable rate of interest	1,557,555	1,593,779
Loans, non-accrual	41,579	44,930
Total	$ 3,732,342	$ 3,737,874

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
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 249,460	$ 246,473	$ 235,704	$ 256,421
Provision for loan losses	19,957	(6,158)	34,482	(10,125)
Loans charged off	(8,049)	(1,368)	(11,716)	(9,173)
Recoveries of loans previously charged off	1,346	2,167	4,244	3,991
Ending balance	262,714	241,114	262,714	241,114
Provision Details [Abstract]
Provision for credit losses	17,000	0	33,000	0
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	62,943	36,245	60,919	32,977
Provision for off-balance sheet credit risk	(3,003)	6,005	(979)	9,273
Ending balance	59,940	42,250	59,940	42,250
Recorded investment [Abstract]
Collectively measured for impairment, recorded investment	23,105,408		23,105,408		$ 22,435,353
Individually measured for impairment, recorded investment	132,251		132,251		121,797
Total	23,237,659		23,237,659		22,557,150
Related allowance [Abstract]
Collectively measured for impairment, related allowance	253,348		253,348		230,134
Individually measured for impairment, related allowance	9,366		9,366		5,570
Total	262,714		262,714		235,704
Commercial [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	139,898	151,448	131,586	162,056
Provision for loan losses	5,420	(15,468)	11,750	(20,586)
Loans charged off	(2,797)	(6)	(2,809)	(6,087)
Recoveries of loans previously charged off	748	1,588	2,742	2,179
Ending balance	143,269	137,562	143,269	137,562
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	20,608	13,966	18,246	13,812
Provision for off-balance sheet credit risk	(314)	1,873	2,048	2,027
Ending balance	20,294	15,839	20,294	15,839
Recorded investment [Abstract]
Collectively measured for impairment, recorded investment	14,461,239		14,461,239		14,152,202
Individually measured for impairment, recorded investment	73,277		73,277		60,297
Total	14,534,516		14,534,516		14,212,499
Related allowance [Abstract]
Collectively measured for impairment, related allowance	135,453		135,453		127,566
Individually measured for impairment, related allowance	7,816		7,816		4,020
Total	143,269		143,269		131,586
Commercial real estate [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	66,003	58,974	57,648	58,553
Provision for loan losses	14,300	4,085	24,726	4,553
Loans charged off	(4,000)	(78)	(6,208)	(269)
Recoveries of loans previously charged off	44	16	181	160
Ending balance	76,347	62,997	76,347	62,997
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	40,211	20,465	40,490	17,442
Provision for off-balance sheet credit risk	(2,530)	4,205	(2,809)	7,228
Ending balance	37,681	24,670	37,681	24,670
Recorded investment [Abstract]
Collectively measured for impairment, recorded investment	4,953,406		4,953,406		4,590,207
Individually measured for impairment, recorded investment	17,395		17,395		16,570
Total	4,970,801		4,970,801		4,606,777
Related allowance [Abstract]
Collectively measured for impairment, related allowance	74,797		74,797		56,098
Individually measured for impairment, related allowance	1,550		1,550		1,550
Total	76,347		76,347		57,648
Loans to individuals [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	43,559	36,051	46,470	35,812
Provision for loan losses	237	5,225	(1,994)	5,908
Loans charged off	(1,252)	(1,284)	(2,699)	(2,817)
Recoveries of loans previously charged off	554	563	1,321	1,652
Ending balance	43,098	40,555	43,098	40,555
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	2,124	1,814	2,183	1,723
Provision for off-balance sheet credit risk	(159)	(73)	(218)	18
Ending balance	1,965	$ 1,741	1,965	$ 1,741
Recorded investment [Abstract]
Collectively measured for impairment, recorded investment	3,690,763		3,690,763		3,692,944
Individually measured for impairment, recorded investment	41,579		41,579		44,930
Total	3,732,342		3,732,342		3,737,874
Related allowance [Abstract]
Collectively measured for impairment, related allowance	43,098		43,098		46,470
Individually measured for impairment, related allowance	0		0		0
Total	$ 43,098		$ 43,098		$ 46,470

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
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	$ 1,856,432		$ 1,856,432		$ 4,453,665
Financing Receivable, Originated, Year Two	4,442,324		4,442,324		3,294,886
Financing Receivable, Originated, Year Three	3,136,948		3,136,948		2,107,063
Financing Receivable, Originated, Year Four	1,921,336		1,921,336		1,734,561
Financing Receivable, Originated, Year Five	1,488,572		1,488,572		1,157,972
Financing Receivable, Originated, More Than Five Years	3,608,359		3,608,359		2,992,242
Financing Receivable, Revolving	6,757,431		6,757,431		6,790,248
Financing Receivable, Revolving, Converted to Term Loan	26,257		26,257		26,513
Total	23,237,659		23,237,659		22,557,150
Financing Receivable, Allowance for Credit Loss, Writeoff	8,049	$ 1,368	11,716	$ 9,173
Commercial [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	1,301,234		1,301,234		2,655,782
Financing Receivable, Originated, Year Two	2,328,366		2,328,366		1,566,129
Financing Receivable, Originated, Year Three	1,423,875		1,423,875		994,261
Financing Receivable, Originated, Year Four	904,021		904,021		838,006
Financing Receivable, Originated, Year Five	739,101		739,101		779,311
Financing Receivable, Originated, More Than Five Years	2,138,793		2,138,793		1,657,429
Financing Receivable, Revolving	5,696,055		5,696,055		5,718,433
Financing Receivable, Revolving, Converted to Term Loan	3,071		3,071		3,148
Total	14,534,516		14,534,516		14,212,499
Financing Receivable, Allowance for Credit Loss, Writeoff	2,797	6	2,809	6,087
Commercial [Member] | Energy [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	120,233		120,233		157,745
Financing Receivable Year One Originated Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Two	99,929		99,929		76,951
Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Three	50,910		50,910		30,284
Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Four	8,713		8,713		13,447
Financing Receivable Year Four Originated Three Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Five	11,179		11,179		6,377
Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, More Than Five Years	12,051		12,051		5,822
Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Revolving	3,205,737		3,205,737		3,134,164
Financing Receivable Revolving Writeoff			0
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Financing Receivable Revolving Converted to Term Writeoff			0
Total	3,508,752		3,508,752		3,424,790
Financing Receivable, Allowance for Credit Loss, Writeoff			0
Commercial [Member] | Healthcare [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	357,976		357,976		932,097
Financing Receivable Year One Originated Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Two	858,531		858,531		604,886
Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Three	602,789		602,789		476,854
Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Four	472,475		472,475		450,755
Financing Receivable Year Four Originated Three Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Five	407,292		407,292		471,362
Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, More Than Five Years	1,014,360		1,014,360		659,507
Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Revolving	277,947		277,947		249,536
Financing Receivable Revolving Writeoff			0
Financing Receivable, Revolving, Converted to Term Loan	17		17		20
Financing Receivable Revolving Converted to Term Writeoff			0
Total	3,991,387		3,991,387		3,845,017
Financing Receivable, Allowance for Credit Loss, Writeoff			0
Commercial [Member] | Services [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	378,254		378,254		822,287
Financing Receivable Year One Originated Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Two	700,727		700,727		507,219
Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Three	467,122		467,122		287,523
Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff			882
Financing Receivable, Originated, Year Four	264,616		264,616		196,711
Financing Receivable Year Four Originated Three Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Five	161,722		161,722		157,673
Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, More Than Five Years	765,181		765,181		702,823
Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Revolving	846,884		846,884		756,524
Financing Receivable Revolving Writeoff			1,899
Financing Receivable, Revolving, Converted to Term Loan	663		663		761
Financing Receivable Revolving Converted to Term Writeoff			0
Total	3,585,169		3,585,169		3,431,521
Financing Receivable, Allowance for Credit Loss, Writeoff			2,781
Commercial [Member] | General business [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	444,771		444,771		743,653
Financing Receivable Year One Originated Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Two	669,179		669,179		377,073
Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Three	303,054		303,054		199,600
Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Four	158,217		158,217		177,093
Financing Receivable Year Four Originated Three Years Before Current Fiscal Year Writeoff			2
Financing Receivable, Originated, Year Five	158,908		158,908		143,899
Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, More Than Five Years	347,201		347,201		289,277
Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff			12
Financing Receivable, Revolving	1,365,487		1,365,487		1,578,209
Financing Receivable Revolving Writeoff			4
Financing Receivable, Revolving, Converted to Term Loan	2,391		2,391		2,367
Financing Receivable Revolving Converted to Term Writeoff			10
Total	3,449,208		3,449,208		3,511,171
Financing Receivable, Allowance for Credit Loss, Writeoff			28
Commercial real estate [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	281,559		281,559		1,188,483
Financing Receivable Year One Originated Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Two	1,541,831		1,541,831		1,158,002
Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Three	1,173,425		1,173,425		552,616
Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Four	491,657		491,657		648,561
Financing Receivable Year Four Originated Three Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Five	550,585		550,585		247,625
Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, More Than Five Years	813,805		813,805		649,874
Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff			6,208
Financing Receivable, Revolving	117,939		117,939		161,616
Financing Receivable Revolving Writeoff			0
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Financing Receivable Revolving Converted to Term Writeoff			0
Total	4,970,801		4,970,801		4,606,777
Financing Receivable, Allowance for Credit Loss, Writeoff	4,000	78	6,208	269
Loans to individuals [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	273,639		273,639		609,400
Financing Receivable, Originated, Year Two	572,127		572,127		570,755
Financing Receivable, Originated, Year Three	539,648		539,648		560,186
Financing Receivable, Originated, Year Four	525,658		525,658		247,994
Financing Receivable, Originated, Year Five	198,886		198,886		131,036
Financing Receivable, Originated, More Than Five Years	655,761		655,761		684,939
Financing Receivable, Revolving	943,437		943,437		910,199
Financing Receivable, Revolving, Converted to Term Loan	23,186		23,186		23,365
Total	3,732,342		3,732,342		3,737,874
Financing Receivable, Allowance for Credit Loss, Writeoff	1,252	$ 1,284	2,699	$ 2,817
Loans to individuals [Member] | Residential mortgage [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	190,406		190,406		354,529
Financing Receivable Year One Originated Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Two	340,442		340,442		374,927
Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Three	361,610		361,610		395,948
Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff			7
Financing Receivable, Originated, Year Four	368,006		368,006		63,504
Financing Receivable Year Four Originated Three Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Five	59,809		59,809		42,571
Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, More Than Five Years	288,227		288,227		281,290
Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff			4
Financing Receivable, Revolving	362,253		362,253		354,986
Financing Receivable Revolving Writeoff			1
Financing Receivable, Revolving, Converted to Term Loan	22,937		22,937		23,029
Financing Receivable Revolving Converted to Term Writeoff			0
Total	1,993,690		1,993,690		1,890,784
Financing Receivable, Allowance for Credit Loss, Writeoff			12
Loans to individuals [Member] | Residential mortgage [Member] | US Government Agency Insured Loans [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		289
Financing Receivable, Originated, Year Two	1,184		1,184		2,254
Financing Receivable, Originated, Year Three	2,089		2,089		9,299
Financing Receivable, Originated, Year Four	6,171		6,171		12,182
Financing Receivable, Originated, Year Five	8,331		8,331		19,563
Financing Receivable, Originated, More Than Five Years	168,395		168,395		202,353
Financing Receivable, Revolving	0		0		0
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	186,170		186,170		245,940
Loans to individuals [Member] | Personal [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	83,233		83,233		254,582
Financing Receivable Year One Originated Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Two	230,501		230,501		193,574
Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff			43
Financing Receivable, Originated, Year Three	175,949		175,949		154,939
Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff			40
Financing Receivable, Originated, Year Four	151,481		151,481		172,308
Financing Receivable Year Four Originated Three Years Before Current Fiscal Year Writeoff			16
Financing Receivable, Originated, Year Five	130,746		130,746		68,902
Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, More Than Five Years	199,139		199,139		201,296
Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff			2,584
Financing Receivable, Revolving	581,184		581,184		555,213
Financing Receivable Revolving Writeoff			4
Financing Receivable, Revolving, Converted to Term Loan	249		249		336
Financing Receivable Revolving Converted to Term Writeoff			1
Total	1,552,482		1,552,482		1,601,150
Financing Receivable, Allowance for Credit Loss, Writeoff			2,688
Performing [Member] | Commercial [Member] | Energy [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	120,233		120,233		157,745
Financing Receivable, Originated, Year Two	99,929		99,929		76,951
Financing Receivable, Originated, Year Three	50,910		50,910		30,284
Financing Receivable, Originated, Year Four	8,713		8,713		12,783
Financing Receivable, Originated, Year Five	10,528		10,528		5,992
Financing Receivable, Originated, More Than Five Years	10,884		10,884		4,980
Financing Receivable, Revolving	3,185,817		3,185,817		3,104,906
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	3,487,014		3,487,014		3,393,641
Performing [Member] | Commercial [Member] | Energy [Member] | Accruing Substandard [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		0
Financing Receivable, Originated, Year Two	0		0		0
Financing Receivable, Originated, Year Three	0		0		0
Financing Receivable, Originated, Year Four	0		0		664
Financing Receivable, Originated, Year Five	651		651		385
Financing Receivable, Originated, More Than Five Years	1,050		1,050		683
Financing Receivable, Revolving	0		0		28,018
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	1,701		1,701		29,750
Performing [Member] | Commercial [Member] | Healthcare [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	357,976		357,976		932,097
Financing Receivable, Originated, Year Two	857,991		857,991		604,886
Financing Receivable, Originated, Year Three	584,067		584,067		476,854
Financing Receivable, Originated, Year Four	465,489		465,489		404,204
Financing Receivable, Originated, Year Five	367,300		367,300		464,989
Financing Receivable, Originated, More Than Five Years	958,933		958,933		618,163
Financing Receivable, Revolving	275,267		275,267		245,898
Financing Receivable, Revolving, Converted to Term Loan	17		17		20
Total	3,867,040		3,867,040		3,747,111
Performing [Member] | Commercial [Member] | Healthcare [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		0
Financing Receivable, Originated, Year Two	0		0		0
Financing Receivable, Originated, Year Three	18,722		18,722		0
Financing Receivable, Originated, Year Four	6,986		6,986		20,071
Financing Receivable, Originated, Year Five	14,025		14,025		0
Financing Receivable, Originated, More Than Five Years	32,123		32,123		18,859
Financing Receivable, Revolving	980		980		4
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	72,836		72,836		38,934
Performing [Member] | Commercial [Member] | Healthcare [Member] | Accruing Substandard [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		0
Financing Receivable, Originated, Year Two	540		540		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	12,518		12,518		14,304
Financing Receivable, Revolving	1,700		1,700		3,634
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	14,758		14,758		17,938
Performing [Member] | Commercial [Member] | Services [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	378,254		378,254		821,785
Financing Receivable, Originated, Year Two	681,854		681,854		496,510
Financing Receivable, Originated, Year Three	461,897		461,897		286,085
Financing Receivable, Originated, Year Four	262,276		262,276		193,481
Financing Receivable, Originated, Year Five	158,543		158,543		156,736
Financing Receivable, Originated, More Than Five Years	759,638		759,638		696,300
Financing Receivable, Revolving	820,662		820,662		722,371
Financing Receivable, Revolving, Converted to Term Loan	607		607		639
Total	3,523,731		3,523,731		3,373,907
Performing [Member] | Commercial [Member] | Services [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		502
Financing Receivable, Originated, Year Two	18,244		18,244		5,139
Financing Receivable, Originated, Year Three	252		252		989
Financing Receivable, Originated, Year Four	180		180		771
Financing Receivable, Originated, Year Five	623		623		894
Financing Receivable, Originated, More Than Five Years	2,171		2,171		1,345
Financing Receivable, Revolving	3,963		3,963		8,668
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	25,433		25,433		18,308
Performing [Member] | Commercial [Member] | Services [Member] | Accruing Substandard [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		0
Financing Receivable, Originated, Year Two	629		629		0
Financing Receivable, Originated, Year Three	836		836		0
Financing Receivable, Originated, Year Four	1,756		1,756		2,459
Financing Receivable, Originated, Year Five	2,556		2,556		43
Financing Receivable, Originated, More Than Five Years	3,372		3,372		2,789
Financing Receivable, Revolving	22,259		22,259		17,665
Financing Receivable, Revolving, Converted to Term Loan	56		56		122
Total	31,464		31,464		23,078
Performing [Member] | Commercial [Member] | General business [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	443,873		443,873		725,894
Financing Receivable, Originated, Year Two	624,377		624,377		361,839
Financing Receivable, Originated, Year Three	292,674		292,674		198,274
Financing Receivable, Originated, Year Four	158,127		158,127		172,878
Financing Receivable, Originated, Year Five	158,780		158,780		139,140
Financing Receivable, Originated, More Than Five Years	339,584		339,584		283,694
Financing Receivable, Revolving	1,327,452		1,327,452		1,570,536
Financing Receivable, Revolving, Converted to Term Loan	2,352		2,352		2,329
Total	3,347,219		3,347,219		3,454,584
Performing [Member] | Commercial [Member] | General business [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	898		898		17,759
Financing Receivable, Originated, Year Two	3,461		3,461		13,065
Financing Receivable, Originated, Year Three	7,449		7,449		208
Financing Receivable, Originated, Year Four	44		44		71
Financing Receivable, Originated, Year Five	114		114		7
Financing Receivable, Originated, More Than Five Years	1,485		1,485		2,291
Financing Receivable, Revolving	15,563		15,563		7,094
Financing Receivable, Revolving, Converted to Term Loan	0		0		26
Total	29,014		29,014		40,521
Performing [Member] | Commercial [Member] | General business [Member] | Accruing Substandard [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		0
Financing Receivable, Originated, Year Two	41,341		41,341		2,169
Financing Receivable, Originated, Year Three	2,931		2,931		66
Financing Receivable, Originated, Year Four	46		46		4,130
Financing Receivable, Originated, Year Five	0		0		4,680
Financing Receivable, Originated, More Than Five Years	6,072		6,072		3,287
Financing Receivable, Revolving	10,629		10,629		94
Financing Receivable, Revolving, Converted to Term Loan	10		10		4
Total	61,029		61,029		14,430
Performing [Member] | Commercial real estate [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	281,559		281,559		1,188,483
Financing Receivable, Originated, Year Two	1,541,831		1,541,831		1,158,002
Financing Receivable, Originated, Year Three	1,173,425		1,173,425		552,616
Financing Receivable, Originated, Year Four	491,657		491,657		641,102
Financing Receivable, Originated, Year Five	543,242		543,242		247,625
Financing Receivable, Originated, More Than Five Years	790,115		790,115		633,304
Financing Receivable, Revolving	117,939		117,939		161,616
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	4,939,768		4,939,768		4,582,748
Performing [Member] | Commercial real estate [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0
Financing Receivable, Originated, Year Two	0		0
Financing Receivable, Originated, Year Three	0		0
Financing Receivable, Originated, Year Four	0		0
Financing Receivable, Originated, Year Five	0		0
Financing Receivable, Originated, More Than Five Years	13,638		13,638
Financing Receivable, Revolving	0		0
Financing Receivable, Revolving, Converted to Term Loan	0		0
Total	13,638		13,638
Performing [Member] | Commercial real estate [Member] | Accruing Substandard [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One					0
Financing Receivable, Originated, Year Two					0
Financing Receivable, Originated, Year Three					0
Financing Receivable, Originated, Year Four					7,459
Financing Receivable, Originated, Year Five					0
Financing Receivable, Originated, More Than Five Years					0
Financing Receivable, Revolving					0
Financing Receivable, Revolving, Converted to Term Loan					0
Total					7,459
Performing [Member] | Loans to individuals [Member] | Residential mortgage [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	190,406		190,406		354,497
Financing Receivable, Originated, Year Two	339,049		339,049		373,190
Financing Receivable, Originated, Year Three	359,330		359,330		393,002
Financing Receivable, Originated, Year Four	363,831		363,831		63,142
Financing Receivable, Originated, Year Five	59,080		59,080		40,525
Financing Receivable, Originated, More Than Five Years	267,776		267,776		260,625
Financing Receivable, Revolving	356,384		356,384		352,126
Financing Receivable, Revolving, Converted to Term Loan	22,218		22,218		22,176
Total	1,958,074		1,958,074		1,859,283
Performing [Member] | Loans to individuals [Member] | Residential mortgage [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		0
Financing Receivable, Originated, Year Two	246		246		81
Financing Receivable, Originated, Year Three	0		0		42
Financing Receivable, Originated, Year Four	1,347		1,347		0
Financing Receivable, Originated, Year Five	0		0		142
Financing Receivable, Originated, More Than Five Years	355		355		388
Financing Receivable, Revolving	3,388		3,388		527
Financing Receivable, Revolving, Converted to Term Loan	0		0		87
Total	5,336		5,336		1,267
Performing [Member] | Loans to individuals [Member] | Residential mortgage [Member] | Accruing Substandard [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		0
Financing Receivable, Originated, Year Two	0		0		0
Financing Receivable, Originated, Year Three	0		0		187
Financing Receivable, Originated, Year Four	0		0		0
Financing Receivable, Originated, Year Five	0		0		0
Financing Receivable, Originated, More Than Five Years	54		54		138
Financing Receivable, Revolving	253		253		117
Financing Receivable, Revolving, Converted to Term Loan	0		0		1
Total	307		307		443
Performing [Member] | Loans to individuals [Member] | Residential mortgage [Member] | US Government Agency Insured Loans [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		289
Financing Receivable, Originated, Year Two	1,184		1,184		2,254
Financing Receivable, Originated, Year Three	2,089		2,089		9,000
Financing Receivable, Originated, Year Four	5,872		5,872		10,722
Financing Receivable, Originated, Year Five	7,690		7,690		17,244
Financing Receivable, Originated, More Than Five Years	157,862		157,862		191,426
Financing Receivable, Revolving	0		0		0
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	174,697		174,697		230,935
Performing [Member] | Loans to individuals [Member] | Personal [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	83,233		83,233		254,497
Financing Receivable, Originated, Year Two	230,418		230,418		193,095
Financing Receivable, Originated, Year Three	175,862		175,862		154,887
Financing Receivable, Originated, Year Four	151,387		151,387		172,114
Financing Receivable, Originated, Year Five	130,574		130,574		68,871
Financing Receivable, Originated, More Than Five Years	199,122		199,122		201,278
Financing Receivable, Revolving	575,095		575,095		549,187
Financing Receivable, Revolving, Converted to Term Loan	249		249		332
Total	1,545,940		1,545,940		1,594,261
Performing [Member] | Loans to individuals [Member] | Personal [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		47
Financing Receivable, Originated, Year Two	47		47		28
Financing Receivable, Originated, Year Three	82		82		40
Financing Receivable, Originated, Year Four	49		49		12
Financing Receivable, Originated, Year Five	7		7		17
Financing Receivable, Originated, More Than Five Years	3		3		0
Financing Receivable, Revolving	6,056		6,056		6,003
Financing Receivable, Revolving, Converted to Term Loan	0		0		4
Total	6,244		6,244		6,151
Performing [Member] | Loans to individuals [Member] | Personal [Member] | Accruing Substandard [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		0
Financing Receivable, Originated, Year Two	0		0		444
Financing Receivable, Originated, Year Three	0		0		0
Financing Receivable, Originated, Year Four	0		0		160
Financing Receivable, Originated, Year Five	160		160		0
Financing Receivable, Originated, More Than Five Years	0		0		0
Financing Receivable, Revolving	5		5		0
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	165		165		604
Nonperforming Financial Instruments [Member] | Commercial [Member] | Energy [Member] | Nonaccrual [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		0
Financing Receivable, Originated, Year Two	0		0		0
Financing Receivable, Originated, Year Three	0		0		0
Financing Receivable, Originated, Year Four	0		0		0
Financing Receivable, Originated, Year Five	0		0		0
Financing Receivable, Originated, More Than Five Years	117		117		159
Financing Receivable, Revolving	19,920		19,920		1,240
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	20,037		20,037		1,399
Nonperforming Financial Instruments [Member] | Commercial [Member] | Healthcare [Member] | Nonaccrual [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		0
Financing Receivable, Originated, Year Two	0		0		0
Financing Receivable, Originated, Year Three	0		0		0
Financing Receivable, Originated, Year Four	0		0		26,480
Financing Receivable, Originated, Year Five	25,967		25,967		6,373
Financing Receivable, Originated, More Than Five Years	10,786		10,786		8,181
Financing Receivable, Revolving	0		0		0
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	36,753		36,753		41,034
Nonperforming Financial Instruments [Member] | Commercial [Member] | Services [Member] | Nonaccrual [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		0
Financing Receivable, Originated, Year Two	0		0		5,570
Financing Receivable, Originated, Year Three	4,137		4,137		449
Financing Receivable, Originated, Year Four	404		404		0
Financing Receivable, Originated, Year Five	0		0		0
Financing Receivable, Originated, More Than Five Years	0		0		2,389
Financing Receivable, Revolving	0		0		7,820
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	4,541		4,541		16,228
Nonperforming Financial Instruments [Member] | Commercial [Member] | General business [Member] | Nonaccrual [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		0
Financing Receivable, Originated, Year Two	0		0		0
Financing Receivable, Originated, Year Three	0		0		1,052
Financing Receivable, Originated, Year Four	0		0		14
Financing Receivable, Originated, Year Five	14		14		72
Financing Receivable, Originated, More Than Five Years	60		60		5
Financing Receivable, Revolving	11,843		11,843		485
Financing Receivable, Revolving, Converted to Term Loan	29		29		8
Total	11,946		11,946		1,636
Nonperforming Financial Instruments [Member] | Commercial real estate [Member] | Nonaccrual [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		0
Financing Receivable, Originated, Year Two	0		0		0
Financing Receivable, Originated, Year Three	0		0		0
Financing Receivable, Originated, Year Four	0		0		0
Financing Receivable, Originated, Year Five	7,343		7,343		0
Financing Receivable, Originated, More Than Five Years	10,052		10,052		16,570
Financing Receivable, Revolving	0		0		0
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	17,395		17,395		16,570
Nonperforming Financial Instruments [Member] | Loans to individuals [Member] | Residential mortgage [Member] | Nonaccrual [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		32
Financing Receivable, Originated, Year Two	1,147		1,147		1,656
Financing Receivable, Originated, Year Three	2,280		2,280		2,717
Financing Receivable, Originated, Year Four	2,828		2,828		362
Financing Receivable, Originated, Year Five	729		729		1,904
Financing Receivable, Originated, More Than Five Years	20,042		20,042		20,139
Financing Receivable, Revolving	2,228		2,228		2,216
Financing Receivable, Revolving, Converted to Term Loan	719		719		765
Total	29,973		29,973		29,791
Nonperforming Financial Instruments [Member] | Loans to individuals [Member] | Residential mortgage [Member] | US Government Agency Insured Loans [Member] | Nonaccrual [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		0
Financing Receivable, Originated, Year Two	0		0		0
Financing Receivable, Originated, Year Three	0		0		299
Financing Receivable, Originated, Year Four	299		299		1,460
Financing Receivable, Originated, Year Five	641		641		2,319
Financing Receivable, Originated, More Than Five Years	10,533		10,533		10,927
Financing Receivable, Revolving	0		0		0
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	11,473		11,473		15,005
Nonperforming Financial Instruments [Member] | Loans to individuals [Member] | Personal [Member] | Nonaccrual [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		38
Financing Receivable, Originated, Year Two	36		36		7
Financing Receivable, Originated, Year Three	5		5		12
Financing Receivable, Originated, Year Four	45		45		22
Financing Receivable, Originated, Year Five	5		5		14
Financing Receivable, Originated, More Than Five Years	14		14		18
Financing Receivable, Revolving	28		28		23
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	$ 133		$ 133		$ 134

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, 2023	Dec. 31, 2022
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	$ 132,251	$ 121,797
Financing Receivable, Nonaccrual, No Allowance	113,625	90,854
Financing Receivable, Nonaccrual, With Allowance	18,626	30,943
Financing Receivable, Nonaccrual, Related Allowance	9,366	5,570
Commercial [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	73,277	60,297
Financing Receivable, Nonaccrual, No Allowance	64,542	45,531
Financing Receivable, Nonaccrual, With Allowance	8,735	14,766
Financing Receivable, Nonaccrual, Related Allowance	7,816	4,020
Commercial [Member] | Energy [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	20,037	1,399
Financing Receivable, Nonaccrual, No Allowance	20,037	1,399
Financing Receivable, Nonaccrual, With Allowance	0	0
Financing Receivable, Nonaccrual, Related Allowance	0	0
Commercial [Member] | Healthcare [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	36,753	41,034
Financing Receivable, Nonaccrual, No Allowance	36,753	34,661
Financing Receivable, Nonaccrual, With Allowance	0	6,373
Financing Receivable, Nonaccrual, Related Allowance	0	946
Commercial [Member] | Services [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	4,541	16,228
Financing Receivable, Nonaccrual, No Allowance	404	7,835
Financing Receivable, Nonaccrual, With Allowance	4,137	8,393
Financing Receivable, Nonaccrual, Related Allowance	3,218	3,074
Commercial [Member] | General business [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	11,946	1,636
Financing Receivable, Nonaccrual, No Allowance	7,348	1,636
Financing Receivable, Nonaccrual, With Allowance	4,598	0
Financing Receivable, Nonaccrual, Related Allowance	4,598	0
Commercial real estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	17,395	16,570
Financing Receivable, Nonaccrual, No Allowance	7,504	393
Financing Receivable, Nonaccrual, With Allowance	9,891	16,177
Financing Receivable, Nonaccrual, Related Allowance	1,550	1,550
Loans to individuals [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	41,579	44,930
Financing Receivable, Nonaccrual, No Allowance	41,579	44,930
Financing Receivable, Nonaccrual, With Allowance	0	0
Financing Receivable, Nonaccrual, Related Allowance	0	0
Loans to individuals [Member] | Residential mortgage [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	29,973	29,791
Financing Receivable, Nonaccrual, No Allowance	29,973	29,791
Financing Receivable, Nonaccrual, With Allowance	0	0
Financing Receivable, Nonaccrual, Related Allowance	0	0
Loans to individuals [Member] | Personal [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	133	134
Financing Receivable, Nonaccrual, No Allowance	133	134
Financing Receivable, Nonaccrual, With Allowance	0	0
Financing Receivable, Nonaccrual, Related Allowance	0	0
US Government Agency Insured Loans [Member] | Loans to individuals [Member] | Residential mortgage [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	11,473	15,005
Financing Receivable, Nonaccrual, No Allowance	11,473	15,005
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) $ in Millions	6 Months Ended
	Jun. 30, 2023 USD ($)
Financing Receivable, Loan Modifications [Line Items]
Financing Receivable, Modified in Period, Amount	$ 57.6
Number of Days Past Due Following Modification to be Considered a Payment Default	30 days
Residential mortgage [Member] | Loans to individuals [Member]
Financing Receivable, Loan Modifications [Line Items]
Financing Receivable, Modified, Subsequent Default	$ 4.4
Healthcare [Member] | Commercial [Member]
Financing Receivable, Loan Modifications [Line Items]
Financing Receivable, Modified in Period, Amount	36.9
General business [Member] | Commercial [Member]
Financing Receivable, Loan Modifications [Line Items]
Financing Receivable, Modified in Period, Amount	9.5
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	10.7
Financing Receivable, Modified, Subsequent Default	$ 4.3

Loans and Allowances for Cred_7

Loans and Allowances for Credit Losses, By Aging Category (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	$ 56,002	$ 76,114
Current and Past Due Performing Loans	23,237,659	22,557,150
30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	51,291	55,039
60 to 89 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	22,334	51,614
90 Days or More [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	105,388	94,633
Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	23,058,646	22,355,864
Commercial [Member]
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	6	396
Current and Past Due Performing Loans	14,534,516	14,212,499
Commercial [Member] | 30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	7,065	7,255
Commercial [Member] | 60 to 89 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	173	30,365
Commercial [Member] | 90 Days or More [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	32,480	5,813
Commercial [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	14,494,798	14,169,066
Commercial [Member] | Energy [Member]
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	0	0
Current and Past Due Performing Loans	3,508,752	3,424,790
Commercial [Member] | Energy [Member] | 30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	0	24
Commercial [Member] | Energy [Member] | 60 to 89 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	0	0
Commercial [Member] | Energy [Member] | 90 Days or More [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	0	0
Commercial [Member] | Energy [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	3,508,752	3,424,766
Commercial [Member] | Healthcare [Member]
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	0	0
Current and Past Due Performing Loans	3,991,387	3,845,017
Commercial [Member] | Healthcare [Member] | 30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	0	5,914
Commercial [Member] | Healthcare [Member] | 60 to 89 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	0	26,480
Commercial [Member] | Healthcare [Member] | 90 Days or More [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	32,070	459
Commercial [Member] | Healthcare [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	3,959,317	3,812,164
Commercial [Member] | Services [Member]
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	0	0
Current and Past Due Performing Loans	3,585,169	3,431,521
Commercial [Member] | Services [Member] | 30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	2,172	1,060
Commercial [Member] | Services [Member] | 60 to 89 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	55	2,461
Commercial [Member] | Services [Member] | 90 Days or More [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	404	4,958
Commercial [Member] | Services [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	3,582,538	3,423,042
Commercial [Member] | General business [Member]
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	6	396
Current and Past Due Performing Loans	3,449,208	3,511,171
Commercial [Member] | General business [Member] | 30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	4,893	257
Commercial [Member] | General business [Member] | 60 to 89 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	118	1,424
Commercial [Member] | General business [Member] | 90 Days or More [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	6	396
Commercial [Member] | General business [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	3,444,191	3,509,094
Commercial real estate [Member]
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	0	0
Current and Past Due Performing Loans	4,970,801	4,606,777
Commercial real estate [Member] | 30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	0	531
Commercial real estate [Member] | 60 to 89 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	0	0
Commercial real estate [Member] | 90 Days or More [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	7,343	217
Commercial real estate [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	4,963,458	4,606,029
Loans to individuals [Member]
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	55,996	75,718
Current and Past Due Performing Loans	3,732,342	3,737,874
Loans to individuals [Member] | 30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	44,226	47,253
Loans to individuals [Member] | 60 to 89 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	22,161	21,249
Loans to individuals [Member] | 90 Days or More [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	65,565	88,603
Loans to individuals [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	3,600,390	3,580,769
Loans to individuals [Member] | Residential mortgage [Member]
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	54	114
Current and Past Due Performing Loans	1,993,690	1,890,784
Loans to individuals [Member] | Residential mortgage [Member] | 30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	10,537	10,632
Loans to individuals [Member] | Residential mortgage [Member] | 60 to 89 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	2,850	1,828
Loans to individuals [Member] | Residential mortgage [Member] | 90 Days or More [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	3,330	6,169
Loans to individuals [Member] | Residential mortgage [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	1,976,973	1,872,155
Loans to individuals [Member] | Residential mortgage [Member] | US Government Agency Insured Loans [Member]
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	55,782	75,604
Current and Past Due Performing Loans	186,170	245,940
Loans to individuals [Member] | Residential mortgage [Member] | US Government Agency Insured Loans [Member] | 30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	30,504	36,119
Loans to individuals [Member] | Residential mortgage [Member] | US Government Agency Insured Loans [Member] | 60 to 89 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	18,302	19,400
Loans to individuals [Member] | Residential mortgage [Member] | US Government Agency Insured Loans [Member] | 90 Days or More [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	62,031	82,402
Loans to individuals [Member] | Residential mortgage [Member] | US Government Agency Insured Loans [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	75,333	108,019
Loans to individuals [Member] | Personal [Member]
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	160	0
Current and Past Due Performing Loans	1,552,482	1,601,150
Loans to individuals [Member] | Personal [Member] | 30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	3,185	502
Loans to individuals [Member] | Personal [Member] | 60 to 89 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	1,009	21
Loans to individuals [Member] | Personal [Member] | 90 Days or More [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	204	32
Loans to individuals [Member] | Personal [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	$ 1,548,084	$ 1,600,595

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, 2023	Jun. 30, 2022	Dec. 31, 2022
Schedule of Residential Mortgage Loans Held For Sale [Line Items]
Residential mortgage loans held for sale, nonperforming	$ 0		$ 0
Number of days for past due for loan to be considered nonperforming (in days)	90 days		90 days
Credit losses recognized on residential mortgage loans held for sale	$ 0	$ 0
Components of Residential Mortgage Loans Held for Sale [Abstract]
Unpaid principal balance	93,379		$ 74,941
Residential mortgage loans held for sale, Fair value	92,250		73,938
Residential mortgage loans held for sale	$ 94,820		$ 75,272
Residential Mortgage Loan Commitments [Member] | Not Designated as Hedging Instrument [Member]
Schedule of Residential Mortgage Loans Held For Sale [Line Items]
General number of days outstanding for residential mortgage commitments, minimum (in days)	60 days		60 days
General number of days outstanding for residential mortgage commitments, maximum (in days)	90 days		90 days
Components of Residential Mortgage Loans Held for Sale [Abstract]
Derivative, Notional Amount	$ 55,031		$ 45,492
Derivative, Net fair value	$ 1,829		$ 1,054
Forward sales contracts [Member] | Not Designated as Hedging Instrument [Member]
Schedule of Residential Mortgage Loans Held For Sale [Line Items]
General number of days for delivery of loans, for which the price is set by forward sales contracts, minimum (in days)	60 days		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	$ 124,228		$ 109,469
Derivative, Net fair value	$ 741		$ 280

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, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Mortgage Banking Revenue [Abstract]
Net realized gains (losses) on sale of mortgage loans	$ (296)	$ 3,158	$ (2,027)	$ 10,041
Net change in unrealized gain (loss) on mortgage loans held for sale	(496)	2,307	(126)	(3,520)
Net change in the fair value of mortgage loan commitments	(865)	998	775	(2,300)
Net change in the fair value of forward sales contracts	1,373	(6,967)	461	330
Total production revenue	(284)	(504)	(917)	4,551
Servicing revenue	15,425	11,872	30,425	23,467
Total mortgage banking revenue	$ 15,141	$ 11,368	$ 29,508	$ 28,018

Mortgage Banking Activities, Mo

Mortgage Banking Activities, Mortgage Servicing Rights (Details)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Summary of Mortgage Servicing Rights [Abstract]
Number of residential mortgage loans serviced for others	116,980		116,980		110,541
Outstanding principal balance of residential mortgage loans serviced for others	$ 20,693,294,000		$ 20,693,294,000		$ 18,863,201,000
Weighted average interest rate	3.58%		3.58%		3.59%
Remaining term (in months)			283 months		283 months
Servicing Asset at Fair Value, Amount [Roll Forward]
Beginning balance	$ 299,803,000	$ 209,563,000	$ 277,608,000	$ 163,198,000	$ 163,198,000
Additions	4,103,000	5,754,000	6,603,000	10,969,000
Acquisitions	0	44,867,000	31,138,000	44,867,000
Changes due to principal payments	(8,445,000)	(7,357,000)	(13,829,000)	(15,317,000)
Change in fair value due to market assumption changes	9,261,000	17,485,000	3,202,000	66,595,000
Ending balance	$ 304,722,000	$ 270,312,000	$ 304,722,000	$ 270,312,000	$ 277,608,000
Servicing Assets at Fair Value, Assumptions Used to Estimate Fair Value [Abstract]
Discount rate - risk-free rate plus a market premium (in hundredths)			9.44%		9.51%
Prepayment rate - based upon loan interest rate, original term and loan type			7.27%		7.54%
Loan servicing costs - annually per loan based upon loan type, performing, minimum (in dollars per loan)			$ 69		$ 69
Loan servicing costs - annually per loan based upon loan type, performing, maximum (in dollars per loan)			94		94
Loan servicing costs - annually per loan based upon loan type, delinquent, minimum (in dollars per loan)			150		150
Loan servicing costs - annually per loan based upon loan type, delinquent, maximum (in dollars per loan)			500		500
Loan servicing costs - annually per loan based upon loan type, foreclosure, minimum (in dollars per loan)			875		875
Loan servicing costs - annually per loan based upon loan type, foreclosure, maximum (in dollars per loan)			$ 8,000		$ 8,000
Escrow earnings rate - indexed to rates paid on deposit accounts with comparable average life (in hundredths)			4.18%		4.06%
Primary secondary mortgage rate spread	105		105		105
Delinquency rate			1.91%		2.33%

Commitments and Contingent Li_2

Commitments and Contingent Liabilities (Details)	6 Months Ended
	Jun. 30, 2023 USD ($)
Judicial Ruling [Member] | Misuse of Revenues Pledged to Municipal Bonds [Member]
Litigation Settlement [Abstract]
Disgorged fees	$ 1,067,721
Litigation Settlement, Amount Awarded to Other Party	$ 600,000
Pending Litigation [Member] | Misuse of Revenues Pledged to Municipal Bonds [Member]
Litigation Settlement [Abstract]
Loss Contingency, Number of Plaintiffs	2
Pending Litigation [Member] | Bank Participation in Fraudulent Sale of Securities by Principals [Member]
Litigation Settlement [Abstract]
Loss Contingency, Number of Plaintiffs	19
Outstanding principal accrued interest and other amounts upon sale of facilities securing payment of the bonds	$ 25,000,000
Principal amount of entered judgment against the principal individual and his wife	36,805,051
Pre-judgment interest amount of entered judgment against the principal individual and his wife	$ 10,937,831
Settled Litigation | Bank Participation in Fraudulent Sale of Securities by Principals [Member]
Litigation Settlement [Abstract]
Loss Contingency, Number of Plaintiffs	7

Commitments and Contingent Li_3

Commitments and Contingent Liabilities Variable Interest Entities (Details) $ in Millions	Jun. 30, 2023 USD ($)
Other Assets [Member]
Variable Interest Entity [Line Items]
Amortization Method Qualified Affordable Housing Project Investments	$ 417
Other Liabilities [Member]
Variable Interest Entity [Line Items]
Qualified Affordable Housing Project Investments, Commitment	$ 101

Shareholders' Equity (Details)

Shareholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		6 Months Ended
	Aug. 01, 2023	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Dividends declared (in dollars per share)		$ 0.54	$ 0.53	$ 1.08	$ 1.06
Schedule of Accumulated Other Income (Loss) [Abstract]
Balance, Beginning of Period				$ (836,955)	$ 72,371
Net change in unrealized gain (loss)		$ (160,408)	$ (242,536)	(36,363)	(881,577)
Transfer of net unrealized loss from AFS to investment securities					0
Interest revenue, Investment securities		16,033	2,455	32,084	2,455
Loss (gain) on available for sale securities, net		3,010	(1,188)	3,010	(2,125)
Other comprehensive income, before income taxes		(141,365)	(241,269)	(1,269)	(881,247)
Federal and state income taxes		(33,247)	(56,467)	(1,552)	(206,248)
Other comprehensive income, net of income taxes		(108,118)	(184,802)	283	(674,999)
Balance, End of Period		(836,672)	(602,628)	(836,672)	(602,628)
Accumulated Net Unrealized Gain (Loss) on Available for Sale Securities [Member]
Schedule of Accumulated Other Income (Loss) [Abstract]
Balance, Beginning of Period				(664,618)	69,775
Net change in unrealized gain (loss)				(36,363)	(881,577)
Transfer of net unrealized loss from AFS to investment securities					267,509
Interest revenue, Investment securities				0	0
Loss (gain) on available for sale securities, net				3,010	(2,125)
Other comprehensive income, before income taxes				(33,353)	(616,193)
Federal and state income taxes				(8,839)	(144,215)
Other comprehensive income, net of income taxes				(24,514)	(471,978)
Balance, End of Period		(689,132)	(402,203)	(689,132)	(402,203)
AOCI, Accumulated Gain (Loss), Debt Securities, Investment Securities Transferred from Available-for-sale, Parent
Schedule of Accumulated Other Income (Loss) [Abstract]
Balance, Beginning of Period				(172,337)	0
Net change in unrealized gain (loss)				0	0
Transfer of net unrealized loss from AFS to investment securities					(267,509)
Interest revenue, Investment securities				32,084	2,455
Loss (gain) on available for sale securities, net				0	0
Other comprehensive income, before income taxes				32,084	(265,054)
Federal and state income taxes				7,287	(62,033)
Other comprehensive income, net of income taxes				24,797	(203,021)
Balance, End of Period		(147,540)	(203,021)	(147,540)	(203,021)
Accumulated Unrealized Gain (Loss) on Employee Benefit Plans [Member]
Schedule of Accumulated Other Income (Loss) [Abstract]
Balance, Beginning of Period				0	2,596
Net change in unrealized gain (loss)				0	0
Transfer of net unrealized loss from AFS to investment securities					0
Interest revenue, Investment securities				0	0
Loss (gain) on available for sale securities, net				0	0
Other comprehensive income, before income taxes				0	0
Federal and state income taxes				0	0
Other comprehensive income, net of income taxes				0	0
Balance, End of Period		$ 0	$ 2,596	$ 0	$ 2,596
Subsequent Event [Member]
Dividends Payable, Date Declared	Aug. 01, 2023
Dividends declared (in dollars per share)	$ 0.54
Dividends Payable, Date to be Paid	Aug. 30, 2023
Dividends Payable, Date of Record	Aug. 15, 2023

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Numerator: [Abstract]
Net income attributable to BOK Financial Corp. shareholders	$ 151,308	$ 132,846	$ 313,676	$ 195,334
Less: Earnings allocated to participating securities	1,202	949	2,457	1,400
Numerator for basic earnings per share – income available to common shareholders	150,106	131,897	311,219	193,934
Effect of reallocating undistributed earnings of participating securities	0	0	0	0
Numerator for diluted earnings per share – income available to common shareholders	$ 150,106	$ 131,897	$ 311,219	$ 193,934
Denominator: [Abstract]
Weighted average shares outstanding (in shares)	66,521,728	67,938,607	66,684,603	68,105,679
Less: Participating securities included in weighted average shares (in shares)	527,596	484,859	522,555	489,283
Denominator for basic earnings per common share (in shares)	65,994,132	67,453,748	66,162,048	67,616,396
Dilutive effect of employee stock compensation plans (in shares)	0	1,424	0	1,438
Denominator for diluted earnings per common share (in shares)	65,994,132	67,455,172	66,162,048	67,617,834
Basic earnings per share	$ 2.27	$ 1.96	$ 4.70	$ 2.87
Diluted earnings per share	$ 2.27	$ 1.96	$ 4.70	$ 2.87

Reportable Segments (Details)

Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting Information [Line Items]
Net interest revenue from external sources	$ 322,261	$ 274,018	$ 674,609	$ 542,429
Net interest revenue (expense) from internal sources	0	0	0	0
Net interest revenue	322,261	274,018	674,609	542,429
Net loans charged off and provisions for credit losses	17,000	0	33,000	0
Net interest revenue after provision for credit losses	305,261	274,018	641,609	542,429
Other operating revenue	209,049	168,617	386,914	256,473
Other operating expense	318,673	273,655	624,485	551,273
Net direct contribution	195,637	168,980	404,038	247,629
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	195,637	168,980	404,038	247,629
Federal and state income taxes	44,001	36,122	89,906	52,319
Net income	151,636	132,858	314,132	195,310
Net income (loss) attributable to non-controlling interests	328	12	456	(24)
Net income attributable to BOK Financial Corp. shareholders	151,308	132,846	313,676	195,334
Average assets	47,908,107	47,288,534	46,950,607	48,915,764
Operating Segments [Member] | Commercial [Member]
Segment Reporting Information [Line Items]
Net interest revenue from external sources	299,712	172,995	587,970	320,585
Net interest revenue (expense) from internal sources	(39,613)	(6,452)	(60,714)	(17,031)
Net interest revenue	260,099	166,543	527,256	303,554
Net loans charged off and provisions for credit losses	6,000	(1,502)	6,076	3,841
Net interest revenue after provision for credit losses	254,099	168,045	521,180	299,713
Other operating revenue	68,828	61,688	125,673	119,115
Other operating expense	77,479	69,631	150,613	134,521
Net direct contribution	245,448	160,102	496,240	284,307
Gain (loss) on financial instruments, net	231	61	173	(143)
Change in fair value of mortgage servicing rights	0	0	0	0
Gain (loss) on repossessed assets, net	408	(4,515)	1,267	(2,722)
Corporate expense allocations	21,404	16,617	39,122	32,847
Net income before taxes	224,683	139,031	458,558	248,595
Federal and state income taxes	54,504	33,916	111,073	60,951
Net income	170,179	105,115	347,485	187,644
Net income (loss) attributable to non-controlling interests	0	0	0	0
Net income attributable to BOK Financial Corp. shareholders	170,179	105,115	347,485	187,644
Average assets	28,170,869	29,269,712	28,166,923	29,545,278
Operating Segments [Member] | Consumer [Member]
Segment Reporting Information [Line Items]
Net interest revenue from external sources	17,828	16,784	38,974	33,699
Net interest revenue (expense) from internal sources	95,563	17,002	183,798	27,294
Net interest revenue	113,391	33,786	222,772	60,993
Net loans charged off and provisions for credit losses	1,129	1,196	2,313	2,308
Net interest revenue after provision for credit losses	112,262	32,590	220,459	58,685
Other operating revenue	32,277	30,089	62,887	64,050
Other operating expense	52,340	52,660	102,538	101,449
Net direct contribution	92,199	10,019	180,808	21,286
Gain (loss) on financial instruments, net	(10,257)	(15,860)	(14,930)	(73,755)
Change in fair value of mortgage servicing rights	9,261	17,485	3,202	66,595
Gain (loss) on repossessed assets, net	0	93	14	138
Corporate expense allocations	12,318	10,120	23,940	22,200
Net income before taxes	78,885	1,617	145,154	(7,936)
Federal and state income taxes	18,553	378	34,139	(1,858)
Net income	60,332	1,239	111,015	(6,078)
Net income (loss) attributable to non-controlling interests	0	0	0	0
Net income attributable to BOK Financial Corp. shareholders	60,332	1,239	111,015	(6,078)
Average assets	9,597,723	10,338,191	9,765,186	10,306,218
Operating Segments [Member] | Wealth Management [Member]
Segment Reporting Information [Line Items]
Net interest revenue from external sources	4,415	39,412	25,355	95,643
Net interest revenue (expense) from internal sources	44,937	(1,665)	78,103	(2,130)
Net interest revenue	49,352	37,747	103,458	93,513
Net loans charged off and provisions for credit losses	(45)	(60)	(69)	(131)
Net interest revenue after provision for credit losses	49,397	37,807	103,527	93,644
Other operating revenue	123,043	86,761	231,954	111,779
Other operating expense	84,859	76,393	166,898	151,012
Net direct contribution	87,581	48,175	168,583	54,411
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	12,574	12,503	24,934	24,575
Net income before taxes	75,007	35,672	143,649	29,836
Federal and state income taxes	17,690	8,385	33,885	7,070
Net income	57,317	27,287	109,764	22,766
Net income (loss) attributable to non-controlling interests	0	0	0	0
Net income attributable to BOK Financial Corp. shareholders	57,317	27,287	109,764	22,766
Average assets	12,949,258	16,902,721	12,309,730	19,101,045
Funds Management and Other [Member]
Segment Reporting Information [Line Items]
Net interest revenue from external sources	306	44,827	22,310	92,502
Net interest revenue (expense) from internal sources	(100,887)	(8,885)	(201,187)	(8,133)
Net interest revenue	(100,581)	35,942	(178,877)	84,369
Net loans charged off and provisions for credit losses	9,916	366	24,680	(6,018)
Net interest revenue after provision for credit losses	(110,497)	35,576	(203,557)	90,387
Other operating revenue	(15,099)	(9,921)	(33,600)	(38,471)
Other operating expense	103,995	74,971	204,436	164,291
Net direct contribution	(229,591)	(49,316)	(441,593)	(112,375)
Gain (loss) on financial instruments, net	10,026	15,799	14,757	73,898
Change in fair value of mortgage servicing rights	(9,261)	(17,485)	(3,202)	(66,595)
Gain (loss) on repossessed assets, net	(408)	4,422	(1,281)	2,584
Corporate expense allocations	(46,296)	(39,240)	(87,996)	(79,622)
Net income before taxes	(182,938)	(7,340)	(343,323)	(22,866)
Federal and state income taxes	(46,746)	(6,557)	(89,191)	(13,844)
Net income	(136,192)	(783)	(254,132)	(9,022)
Net income (loss) attributable to non-controlling interests	328	12	456	(24)
Net income attributable to BOK Financial Corp. shareholders	(136,520)	(795)	(254,588)	(8,998)
Average assets	$ (2,809,743)	$ (9,222,090)	$ (3,291,232)	$ (10,036,777)

Fees and Commissions Revenue _3

Fees and Commissions Revenue Fees and Commissions (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2023		Jun. 30, 2022		Jun. 30, 2023		Jun. 30, 2022
Disaggregation of Revenue [Line Items]
Total fees and commissions	$ 200,497		$ 173,373		$ 386,476		$ 271,008
Fees and commissions revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	200,497		173,373		386,476		271,008
Fees and commission revenue not from contracts with customers	77,322	[1]	50,763	[2]	139,800	[3]	34,677	[4]
Fees and commissions revenue from contracts with customers	123,175	[5]	122,610	[6]	246,676	[7]	236,331	[8]
Brokerage and trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	65,006		44,043		117,402		16,964
Fees and commission revenue not from contracts with customers	54,015	[1]	31,495	[2]	93,565	[3]	(8,516)	[4]
Fees and commissions revenue from contracts with customers	10,991	[5]	12,548	[6]	23,837	[7]	25,480	[8]
Trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	36,921		11,991		64,519		(42,057)
Fees and commission revenue not from contracts with customers	36,921	[1]	11,991	[2]	64,519	[3]	(42,057)	[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	13,642		13,133		21,996		24,071
Fees and commission revenue not from contracts with customers	13,642	[1]	13,133	[2]	21,996	[3]	24,071	[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	3,321		4,258		7,165		8,868
Fees and commission revenue not from contracts with customers	0	[1]	0	[2]	0	[3]	0	[4]
Fees and commissions revenue from contracts with customers	3,321	[5]	4,258	[6]	7,165	[7]	8,868	[8]
Insurance brokerage revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	2,857		2,818		6,163		6,556
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	2,857	[5]	2,818	[6]	6,163	[7]	6,556	[8]
Investment banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	8,265		11,843		17,559		19,526
Fees and commission revenue not from contracts with customers	3,452	[1]	6,371	[2]	7,050	[3]	9,470	[4]
Fees and commissions revenue from contracts with customers	4,813	[5]	5,472	[6]	10,509	[7]	10,056	[8]
Transaction card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	26,003		26,940		51,624		51,156
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	26,003	[5]	26,940	[6]	51,624	[7]	51,156	[8]
TransFund EFT network revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	21,375		21,262		42,767		40,285
Fees and commission revenue not from contracts with customers	0	[1]	0	[2]	0	[3]	0	[4]
Fees and commissions revenue from contracts with customers	21,375	[5]	21,262	[6]	42,767	[7]	40,285	[8]
Merchant services revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	2,504		3,877		4,662		7,528
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	2,504	[5]	3,877	[6]	4,662	[7]	7,528	[8]
Corporate card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	2,124		1,801		4,195		3,343
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	2,124	[5]	1,801	[6]	4,195	[7]	3,343	[8]
Fiduciary and asset management revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	52,997		49,838		103,654		96,237
Fees and commission revenue not from contracts with customers	0	[1]	0	[2]	0	[3]	0	[4]
Fees and commissions revenue from contracts with customers	52,997	[5]	49,838	[6]	103,654	[7]	96,237	[8]
Personal trust revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	25,799		25,676		49,744		50,473
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	25,799	[5]	25,676	[6]	49,744	[7]	50,473	[8]
Corporate trust revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	7,201		6,476		14,861		10,434
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	7,201	[5]	6,476	[6]	14,861	[7]	10,434	[8]
Institutional trust & retirement plan services revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	13,223		12,574		26,058		25,141
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	13,223	[5]	12,574	[6]	26,058	[7]	25,141	[8]
Investment management services and other revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	6,774		5,112		12,991		10,189
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	6,774	[5]	5,112	[6]	12,991	[7]	10,189	[8]
Deposit service charges and fees [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	27,100		28,500		53,068		55,504
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	27,100	[5]	28,500	[6]	53,068	[7]	55,504	[8]
Commercial account service charge revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	14,380		14,782		28,227		28,877
Fees and commission revenue not from contracts with customers	0	[1]	0	[2]	0	[3]	0	[4]
Fees and commissions revenue from contracts with customers	14,380	[5]	14,782	[6]	28,227	[7]	28,877	[8]
Overdraft fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	5,141		6,595		10,014		12,842
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	5,141	[5]	6,595	[6]	10,014	[7]	12,842	[8]
Check card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	5,975		6,015		11,614		11,560
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	5,975	[5]	6,015	[6]	11,614	[7]	11,560	[8]
Automated service charge and other deposit fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	1,604		1,108		3,213		2,225
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	1,604	[5]	1,108	[6]	3,213	[7]	2,225	[8]
Mortgage banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	15,141		11,368		29,508		28,018
Fees and commission revenue not from contracts with customers	15,141	[1]	11,368	[2]	29,508	[3]	28,018	[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	(284)		(504)		(917)		4,551
Fees and commission revenue not from contracts with customers	(284)	[1]	(504)	[2]	(917)	[3]	4,551	[4]
Fees and commissions revenue from contracts with customers	0	[5]	0	[6]	0	[7]	0	[8]
Mortgage servicing revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	15,425		11,872		30,425		23,467
Fees and commission revenue not from contracts with customers	15,425	[1]	11,872	[2]	30,425	[3]	23,467	[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	14,250		12,684		31,220		23,129
Fees and commission revenue not from contracts with customers	8,166	[1]	7,900	[2]	16,727	[3]	15,175	[4]
Fees and commissions revenue from contracts with customers	6,084	[5]	4,784	[6]	14,493	[7]	7,954	[8]
Operating Segments [Member] | Commercial [Member] | Fees and commissions revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	59,704		59,881		115,539		116,845
Operating Segments [Member] | Commercial [Member] | Brokerage and trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	16,353		14,809		26,538		31,146
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	12,839		7,740		19,326		20,719
Operating Segments [Member] | Commercial [Member] | Retail brokerage revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Operating Segments [Member] | Commercial [Member] | Insurance brokerage revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Operating Segments [Member] | Commercial [Member] | Investment banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	3,514		7,069		7,212		10,427
Operating Segments [Member] | Commercial [Member] | Transaction card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	24,811		25,828		49,245		48,998
Operating Segments [Member] | Commercial [Member] | TransFund EFT network revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	20,483		20,367		40,982		38,520
Operating Segments [Member] | Commercial [Member] | Merchant services revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	2,494		3,867		4,644		7,508
Operating Segments [Member] | Commercial [Member] | Corporate card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	1,834		1,594		3,619		2,970
Operating Segments [Member] | Commercial [Member] | Fiduciary and asset management revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Operating Segments [Member] | Commercial [Member] | Personal trust revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Operating Segments [Member] | Commercial [Member] | Corporate trust revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Operating Segments [Member] | Commercial [Member] | Institutional trust & retirement plan services revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Operating Segments [Member] | Commercial [Member] | Investment management services and other revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Operating Segments [Member] | Commercial [Member] | Deposit service charges and fees [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	13,663		13,841		26,796		27,026
Operating Segments [Member] | Commercial [Member] | Commercial account service charge revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	13,364		13,791		26,235		26,922
Operating Segments [Member] | Commercial [Member] | Overdraft fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	32		29		57		60
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	267		21		504		44
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	4,877		5,403		12,960		9,675
Operating Segments [Member] | Consumer [Member] | Fees and commissions revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	32,361		30,101		62,942		64,078
Operating Segments [Member] | Consumer [Member] | Brokerage and trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Operating Segments [Member] | Consumer [Member] | Trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Operating Segments [Member] | Consumer [Member] | Customer hedging revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Operating Segments [Member] | Consumer [Member] | Retail brokerage revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Operating Segments [Member] | Consumer [Member] | Insurance brokerage revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Operating Segments [Member] | Consumer [Member] | Investment banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Operating Segments [Member] | Consumer [Member] | Transaction card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	917		922		1,833		1,818
Operating Segments [Member] | Consumer [Member] | TransFund EFT network revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	907		912		1,815		1,798
Operating Segments [Member] | Consumer [Member] | Merchant services revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	10		10		18		20
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	12,805		14,087		25,083		27,382
Operating Segments [Member] | Consumer [Member] | Commercial account service charge revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	530		469		1,029		919
Operating Segments [Member] | Consumer [Member] | Overdraft fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	5,066		6,544		9,894		12,737
Operating Segments [Member] | Consumer [Member] | Check card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	5,976		6,013		11,614		11,558
Operating Segments [Member] | Consumer [Member] | Automated service charge and other deposit fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	1,233		1,061		2,546		2,168
Operating Segments [Member] | Consumer [Member] | Mortgage banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	15,709		11,864		30,634		28,995
Operating Segments [Member] | Consumer [Member] | Mortgage production revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	(284)		(504)		(917)		4,551
Operating Segments [Member] | Consumer [Member] | Mortgage servicing revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	15,993		12,368		31,551		24,444
Operating Segments [Member] | Consumer [Member] | Other revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	2,930		3,228		5,392		5,883
Operating Segments [Member] | Wealth Management [Member] | Fees and commissions revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	123,050		86,771		231,961		111,794
Operating Segments [Member] | Wealth Management [Member] | Brokerage and trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	47,691		24,146		88,135		(16,412)
Operating Segments [Member] | Wealth Management [Member] | Trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	36,921		11,991		64,519		(42,057)
Operating Segments [Member] | Wealth Management [Member] | Customer hedging revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	(159)		305		(59)		1,122
Operating Segments [Member] | Wealth Management [Member] | Retail brokerage revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	3,321		4,258		7,165		8,868
Operating Segments [Member] | Wealth Management [Member] | Insurance brokerage revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	2,857		2,818		6,163		6,556
Operating Segments [Member] | Wealth Management [Member] | Investment banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	4,751		4,774		10,347		9,099
Operating Segments [Member] | Wealth Management [Member] | Transaction card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	167		82		327		141
Operating Segments [Member] | Wealth Management [Member] | TransFund EFT network revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	(17)		(19)		(34)		(36)
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	184		101		361		177
Operating Segments [Member] | Wealth Management [Member] | Fiduciary and asset management revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	52,998		49,838		103,676		96,281
Operating Segments [Member] | Wealth Management [Member] | Personal trust revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	25,799		25,676		49,744		50,473
Operating Segments [Member] | Wealth Management [Member] | Corporate trust revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	7,201		6,476		14,861		10,434
Operating Segments [Member] | Wealth Management [Member] | Institutional trust & retirement plan services revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	13,223		12,574		26,058		25,141
Operating Segments [Member] | Wealth Management [Member] | Investment management services and other revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	6,775		5,112		13,013		10,233
Operating Segments [Member] | Wealth Management [Member] | Deposit service charges and fees [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	633		569		1,189		1,091
Operating Segments [Member] | Wealth Management [Member] | Commercial account service charge revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	488		523		965		1,036
Operating Segments [Member] | Wealth Management [Member] | Overdraft fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	42		21		62		44
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	103		25		162		11
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	21,561		12,136		38,634		30,693
Funds Management and Other [Member] | Fees and commissions revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	(14,618)		(3,380)		(23,966)		(21,709)
Funds Management and Other [Member] | Brokerage and trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	962		5,088		2,729		2,230
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	962		5,088		2,729		2,230
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		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	108		108		219		199
Funds Management and Other [Member] | TransFund EFT network revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	2		2		4		3
Funds Management and Other [Member] | Merchant services revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0		0		0
Funds Management and Other [Member] | Corporate card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	106		106		215		196
Funds Management and Other [Member] | Fiduciary and asset management revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	(1)		0		(22)		(44)
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	(1)		0		(22)		(44)
Funds Management and Other [Member] | Deposit service charges and fees [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	(1)		3		0		5
Funds Management and Other [Member] | Commercial account service charge revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	(2)		(1)		(2)		0
Funds Management and Other [Member] | Overdraft fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	1		1		1		1
Funds Management and Other [Member] | Check card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	(1)		2		0		2
Funds Management and Other [Member] | Automated service charge and other deposit fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	1		1		1		2
Funds Management and Other [Member] | Mortgage banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	(568)		(496)		(1,126)		(977)
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	(568)		(496)		(1,126)		(977)
Funds Management and Other [Member] | Other revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	$ (15,118)		$ (8,083)		$ (25,766)		$ (23,122)
[1]Out of scope revenue generally relates to financial instruments or contractual rights and obligations within the scope of other applicable accounting guidance.[2]Out of scope revenue generally relates to financial instruments or contractual rights and obligations within the scope of other applicable accounting guidance.[3]Out of scope revenue generally relates to financial instruments or contractual rights and obligations within the scope of other applicable accounting guidance.[4]Out of scope revenue generally relates to financial instruments or contractual rights and obligations within the scope of other applicable accounting guidance.[5]In scope revenue represents revenue subject to FASB ASC Topic 606, Revenue from Contracts with Customers.[6]In scope revenue represents revenue subject to FASB ASC Topic 606, Revenue from Contracts with Customers.[7]In scope revenue represents revenue subject to FASB ASC Topic 606, Revenue from Contracts with Customers.[8]In scope revenue represents revenue subject to FASB ASC Topic 606, Revenue from Contracts with Customers.

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, 2023		Mar. 31, 2023	Dec. 31, 2022		Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Assets: [Abstract]
Trading securities	$ 5,442,364			$ 4,464,161
Available for sale securities	11,938,523			11,493,860
Fair value option securities	212,321			296,590
Mortgage servicing rights	304,722		$ 299,803	277,608		$ 270,312	$ 209,563	$ 163,198
Derviative contracts, net of cash collateral, Assets, Fair value	353,037			880,343
Liabilities: [Abstract]
Derivative contracts, net of cash collateral, Liabilities, Fair Value	550,653			554,900
U.S. government securities [Member]
Assets: [Abstract]
Trading securities	46,994			9,823
Residential agency mortgage-backed securities [Member]
Assets: [Abstract]
Trading securities	5,334,372			4,406,848
Available for sale securities	6,114,202			5,814,496
Fair value option securities	212,321			296,590
Municipal securities [Member]
Assets: [Abstract]
Trading securities	49,595			21,484
Available for sale securities	491,715			624,500
U.S. Treasury [Member]
Assets: [Abstract]
Available for sale securities	901			898
Residential non-agency mortgage-backed securities [Member]
Assets: [Abstract]
Available for sale securities	699,178			577,576
Commercial agency mortgage-backed securities [Member]
Assets: [Abstract]
Available for sale securities	4,632,054			4,475,917
Other debt securities [Member]
Assets: [Abstract]
Trading securities	11,403			26,006
Available for sale securities	473			473
Fair Value, Recurring [Member]
Assets: [Abstract]
Trading securities	5,442,364			4,464,161
Available for sale securities	11,938,523			11,493,860
Residential mortgage loans held for sale	94,820	[1]		75,272	[2]
Mortgage servicing rights	304,722	[3]		277,608	[4]
Derviative contracts, net of cash collateral, Assets, Fair value	353,037			880,343
Liabilities: [Abstract]
Derivative contracts, net of cash collateral, Liabilities, Fair Value	550,653			554,900
Fair Value, Recurring [Member] | U.S. government securities [Member]
Assets: [Abstract]
Trading securities	46,994			9,823
Fair Value, Recurring [Member] | Residential agency mortgage-backed securities [Member]
Assets: [Abstract]
Trading securities	5,334,372			4,406,848
Available for sale securities	6,114,202			5,814,496
Fair value option securities	212,321			296,590
Fair Value, Recurring [Member] | Municipal securities [Member]
Assets: [Abstract]
Trading securities	49,595			21,484
Available for sale securities	491,715			624,500
Fair Value, Recurring [Member] | Other trading securities
Assets: [Abstract]
Trading securities	11,403			26,006
Fair Value, Recurring [Member] | U.S. Treasury [Member]
Assets: [Abstract]
Available for sale securities	901			898
Fair Value, Recurring [Member] | Residential non-agency mortgage-backed securities [Member]
Assets: [Abstract]
Available for sale securities	699,178			577,576
Fair Value, Recurring [Member] | Commercial agency mortgage-backed securities [Member]
Assets: [Abstract]
Available for sale securities	4,632,054			4,475,917
Fair Value, Recurring [Member] | Other debt securities [Member]
Assets: [Abstract]
Available for sale securities	473			473
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets: [Abstract]
Trading securities	4,963			4,970
Available for sale securities	901			898
Residential mortgage loans held for sale	0	[1]		0	[2]
Mortgage servicing rights	0	[3]		0	[4]
Derviative contracts, net of cash collateral, Assets, Fair value	2,506			2,110
Liabilities: [Abstract]
Derivative contracts, net of cash collateral, Liabilities, Fair Value	4			16
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | U.S. government securities [Member]
Assets: [Abstract]
Trading securities	4,963			4,970
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Residential agency mortgage-backed securities [Member]
Assets: [Abstract]
Trading securities	0			0
Available for sale securities	0			0
Fair value option securities	0			0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Municipal securities [Member]
Assets: [Abstract]
Trading securities	0			0
Available for sale securities	0			0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Other trading securities
Assets: [Abstract]
Trading securities	0			0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | U.S. Treasury [Member]
Assets: [Abstract]
Available for sale securities	901			898
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Residential non-agency mortgage-backed securities [Member]
Assets: [Abstract]
Available for sale securities	0			0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Commercial agency mortgage-backed securities [Member]
Assets: [Abstract]
Available for sale securities	0			0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Other debt securities [Member]
Assets: [Abstract]
Available for sale securities	0			0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets: [Abstract]
Trading securities	5,437,401			4,459,191
Available for sale securities	11,937,149			11,492,489
Residential mortgage loans held for sale	87,572	[1]		68,054	[2]
Mortgage servicing rights	0	[3]		0	[4]
Derviative contracts, net of cash collateral, Assets, Fair value	350,531			878,233
Liabilities: [Abstract]
Derivative contracts, net of cash collateral, Liabilities, Fair Value	550,649			554,884
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | U.S. government securities [Member]
Assets: [Abstract]
Trading securities	42,031			4,853
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Residential agency mortgage-backed securities [Member]
Assets: [Abstract]
Trading securities	5,334,372			4,406,848
Available for sale securities	6,114,202			5,814,496
Fair value option securities	212,321			296,590
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Municipal securities [Member]
Assets: [Abstract]
Trading securities	49,595			21,484
Available for sale securities	491,715			624,500
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Other trading securities
Assets: [Abstract]
Trading securities	11,403			26,006
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | U.S. Treasury [Member]
Assets: [Abstract]
Available for sale securities	0			0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Residential non-agency mortgage-backed securities [Member]
Assets: [Abstract]
Available for sale securities	699,178			577,576
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Commercial agency mortgage-backed securities [Member]
Assets: [Abstract]
Available for sale securities	4,632,054			4,475,917
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Other debt securities [Member]
Assets: [Abstract]
Available for sale securities	0			0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets: [Abstract]
Trading securities	0			0
Available for sale securities	473			473
Residential mortgage loans held for sale	7,248	[1]		7,218	[2]
Mortgage servicing rights	304,722	[3]		277,608	[4]
Derviative contracts, net of cash collateral, Assets, Fair value	$ 0			$ 0
Liquidity Discount on Mortgage Loans Qualifying for Sale to US Govt Agencies	78.99%			77.55%
Liabilities: [Abstract]
Derivative contracts, net of cash collateral, Liabilities, Fair Value	$ 0			$ 0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | U.S. government securities [Member]
Assets: [Abstract]
Trading securities	0			0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Residential agency mortgage-backed securities [Member]
Assets: [Abstract]
Trading securities	0			0
Available for sale securities	0			0
Fair value option securities	0			0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Municipal securities [Member]
Assets: [Abstract]
Trading securities	0			0
Available for sale securities				0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Other trading securities
Assets: [Abstract]
Trading securities	0			0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | U.S. Treasury [Member]
Assets: [Abstract]
Available for sale securities	0			0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Residential non-agency mortgage-backed securities [Member]
Assets: [Abstract]
Available for sale securities	0			0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Commercial agency mortgage-backed securities [Member]
Assets: [Abstract]
Available for sale securities	0			0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Other debt securities [Member]
Assets: [Abstract]
Available for sale securities	$ 473			$ 473
[1]Residential mortgage loans held for sale measured at fair value on a recurring basis using significant unobservable inputs (Level 3) consist of residential mortgage loans intended for sale to U.S. government agencies that fail to meet conforming standards and are valued at 78.99% of the unpaid principal balance.[2]Residential mortgage loans held for sale measured at fair value on a recurring basis using significant unobservable inputs (Level 3) consist of residential mortgage loans intended for sale to U.S. government agencies that fail to meet conforming standards and are valued at 77.55% of the unpaid principal balance.[3]A reconciliation of the beginning and ending fair value of mortgage servicing rights and disclosures of significant assumptions used to determine fair value are presented in Note 5, Mortgage Banking Activities. 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 . 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 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, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other gains (losses), net	$ 12,618	$ (7,639)	$ 14,869	$ (9,283)
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	6,797	0	8,787	478
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	0	0
Other gains (losses), net	0	(5,811)	(101)	(5,705)
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | Nonaccruing Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	0	0	0	0
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | Real estate and other repossessed assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	0	0	0	0
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] | Nonaccruing Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	0	99	0	99
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	$ 1,412	$ 547	$ 1,412

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] - Fair Value, Inputs, Level 3 [Member] - USD ($) $ in Thousands	Jun. 30, 2023		Jun. 30, 2022
Discounted Cash Flow [Member] | Nonaccruing Loans [Member] | Management knowledge of Industry and non-real estate collateral including but not limited to recoverable oil and gas reserves, forward-looking commodity prices, estimated operating costs [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure			$ 126
Discounted Cash Flow [Member] | Nonaccruing Loans [Member] | Management knowledge of industry and non-real estate collateral
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure	$ 12,048
Discounted Cash Flow [Member] | Real estate and other repossessed assets [Member] | Management knowledge of Industry and non-real estate collateral including but not limited to recoverable oil and gas reserves, forward-looking commodity prices, estimated operating costs [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure	$ 0
Discounted Cash Flow [Member] | Real estate and other repossessed assets [Member] | Management knowledge of industry and non-real estate collateral
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure			$ 1,699
Minimum [Member] | Nonaccruing Loans [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value of Impaired Loans as Percentage of Unpaid Principal Balance	44%	[1]	25%	[2]
Maximum [Member] | Nonaccruing Loans [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value of Impaired Loans as Percentage of Unpaid Principal Balance	62%	[1]	25%	[2]
Weighted Average [Member] | Nonaccruing Loans [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value of Impaired Loans as Percentage of Unpaid Principal Balance	58%	[1]	25%	[2]
[1]Represents fair value as a percentage of the unpaid principal balance.[2]Represents fair value as a percentage of the unpaid principal balance.

Fair Value Measurements, Financ

Fair Value Measurements, Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2023		Mar. 31, 2023	Dec. 31, 2022		Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	$ 5,442,364			$ 4,464,161
Debt Securities, Held-to-maturity, gross	2,567,448			2,739,241
Investment securities, Allowance for Credit Loss	(465)	[1]		(558)	[2]
Investment Securities, Amortized Cost, After Allowance for Credit Loss	2,566,983			2,738,683
Available for sale securities	11,938,523			11,493,860
Fair value option securities	212,321			296,590
Residential mortgage loans held for sale	94,820			75,272
Loans	23,237,659			22,557,150
Allowance for loan losses	(262,714)			(235,704)
Loans, net of allowance	22,974,945			22,321,446
Mortgage servicing rights	304,722		$ 299,803	277,608		$ 270,312	$ 209,563	$ 163,198
Derviative contracts, net of cash collateral, Assets, Fair value	353,037			880,343
Time deposits	2,706,377			1,461,842
Subordinated debentures	131,154			131,205
Derivative contracts, net of cash collateral, Liabilities, Fair Value	550,653			554,900
Commercial [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	14,534,516			14,212,499
Allowance for loan losses	(143,269)			(131,586)
Commercial real estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	4,970,801			4,606,777
Allowance for loan losses	(76,347)			(57,648)
Loans to individuals [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	3,732,342			3,737,874
Allowance for loan losses	(43,098)			(46,470)
U.S. government securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	46,994			9,823
Residential agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	5,334,372			4,406,848
Debt Securities, Held-to-maturity, gross	2,397,098			2,538,565
Available for sale securities	6,114,202			5,814,496
Fair value option securities	212,321			296,590
Municipal securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	49,595			21,484
Debt Securities, Held-to-maturity, gross	136,803			170,629
Available for sale securities	491,715			624,500
U.S. Treasury [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	901			898
Residential non-agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	699,178			577,576
Commercial agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Securities, Held-to-maturity, gross	17,259			17,259
Available for sale securities	4,632,054			4,475,917
Other debt securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	11,403			26,006
Debt Securities, Held-to-maturity, gross	16,288			12,788
Available for sale securities	473			473
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	875,714			943,810
Interest-bearing cash and cash equivalents	571,616			457,906
Trading securities	5,442,364			4,464,161
Debt Securities, Held-to-maturity, gross	2,374,536			2,514,245
Investment securities, Allowance for Credit Loss	(465)			(558)
Investment Securities, Amortized Cost, After Allowance for Credit Loss	2,374,071			2,513,687
Available for sale securities	11,938,523			11,493,860
Residential mortgage loans held for sale	94,820			75,272
Loans	23,237,659			22,557,150
Allowance for loan losses	(262,714)			(235,704)
Loans, net of allowance	22,974,945			22,321,446
Mortgage servicing rights	304,722			277,608
Derviative contracts, net of cash collateral, Assets, Fair value	353,037			880,343
Deposits with no stated maturity	30,588,466			33,018,863
Time deposits	2,706,377			1,461,842
Other borrowed funds	9,223,920			7,007,285
Subordinated debentures	131,154			131,205
Derivative contracts, net of cash collateral, Liabilities, Fair Value	550,653			554,900
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Commercial [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	14,534,516			14,212,499
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Commercial real estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	4,970,801			4,606,777
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Loans to individuals [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	3,732,342			3,737,874
Carrying (Reported) Amount, Fair Value Disclosure [Member] | U.S. government securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	46,994			9,823
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Residential agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	5,334,372			4,406,848
Debt Securities, Held-to-maturity, gross	2,205,685			2,315,219
Available for sale securities	6,114,202			5,814,496
Fair value option securities	212,321			296,590
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Municipal securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	49,595			21,484
Debt Securities, Held-to-maturity, gross	136,803			170,629
Available for sale securities	491,715			624,500
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Other trading securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	11,403			26,006
Carrying (Reported) Amount, Fair Value Disclosure [Member] | U.S. Treasury [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	901			898
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Residential non-agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	699,178			577,576
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Commercial agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Securities, Held-to-maturity, gross	15,760			15,609
Available for sale securities	4,632,054			4,475,917
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Other debt securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Securities, Held-to-maturity, gross	16,288			12,788
Available for sale securities	473			473
Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	875,714			943,810
Interest-bearing cash and cash equivalents	571,616			457,906
Trading securities	5,442,364			4,464,161
Debt Securities, Held-to-maturity, gross	2,185,384			2,346,768
Investment securities, Allowance for Credit Loss	0			0
Investment Securities, Amortized Cost, After Allowance for Credit Loss	2,185,384			2,346,768
Available for sale securities	11,938,523			11,493,860
Residential mortgage loans held for sale	94,820			75,272
Loans	22,846,124			21,891,223
Allowance for loan losses	0			0
Loans, net of allowance	22,846,124			21,891,223
Mortgage servicing rights	304,722			277,608
Derviative contracts, net of cash collateral, Assets, Fair value	353,037			880,343
Deposits with no stated maturity	30,588,466			33,018,863
Time deposits	2,672,789			1,431,245
Other borrowed funds	9,221,872			7,005,305
Subordinated debentures	112,501			121,497
Derivative contracts, net of cash collateral, Liabilities, Fair Value	550,653			554,900
Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	14,428,246			13,905,765
Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial real estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	4,839,799			4,454,048
Estimate of Fair Value, Fair Value Disclosure [Member] | Loans to individuals [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	3,578,079			3,531,410
Estimate of Fair Value, Fair Value Disclosure [Member] | U.S. government securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	46,994			9,823
Estimate of Fair Value, Fair Value Disclosure [Member] | Residential agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	5,334,372			4,406,848
Debt Securities, Held-to-maturity, gross	2,014,427			2,143,360
Available for sale securities	6,114,202			5,814,496
Fair value option securities	212,321			296,590
Estimate of Fair Value, Fair Value Disclosure [Member] | Municipal securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	49,595			21,484
Debt Securities, Held-to-maturity, gross	141,587			176,621
Available for sale securities	491,715			624,500
Estimate of Fair Value, Fair Value Disclosure [Member] | Other trading securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	11,403			26,006
Estimate of Fair Value, Fair Value Disclosure [Member] | U.S. Treasury [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	901			898
Estimate of Fair Value, Fair Value Disclosure [Member] | Residential non-agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	699,178			577,576
Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Securities, Held-to-maturity, gross	14,636			14,588
Available for sale securities	4,632,054			4,475,917
Estimate of Fair Value, Fair Value Disclosure [Member] | Other debt securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Securities, Held-to-maturity, gross	14,734			12,199
Available for sale securities	473			473
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	875,714			943,810
Interest-bearing cash and cash equivalents	571,616			457,906
Trading securities	4,963			4,970
Debt Securities, Held-to-maturity, gross	0			0
Investment securities, Allowance for Credit Loss	0			0
Investment Securities, Amortized Cost, After Allowance for Credit Loss	0			0
Available for sale securities	901			898
Residential mortgage loans held for sale	0			0
Loans	0			0
Allowance for loan losses	0			0
Loans, net of allowance	0			0
Mortgage servicing rights	0			0
Derviative contracts, net of cash collateral, Assets, Fair value	2,506			2,110
Deposits with no stated maturity	0			0
Time deposits	0			0
Other borrowed funds	0			0
Subordinated debentures	0			0
Derivative contracts, net of cash collateral, Liabilities, Fair Value	4			16
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	0			0
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial real estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	0			0
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Loans to individuals [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	0			0
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | U.S. government securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	4,963			4,970
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Residential agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0			0
Debt Securities, Held-to-maturity, gross	0			0
Available for sale securities	0			0
Fair value option securities	0			0
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Municipal securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0			0
Debt Securities, Held-to-maturity, gross	0			0
Available for sale securities	0			0
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Other trading securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0			0
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | U.S. Treasury [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	901			898
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Residential non-agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	0			0
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Securities, Held-to-maturity, gross	0			0
Available for sale securities	0			0
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Other debt securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Securities, Held-to-maturity, gross	0			0
Available for sale securities	0			0
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	0			0
Interest-bearing cash and cash equivalents	0			0
Trading securities	5,437,401			4,459,191
Debt Securities, Held-to-maturity, gross	2,061,364			2,208,253
Investment securities, Allowance for Credit Loss	0			0
Investment Securities, Amortized Cost, After Allowance for Credit Loss	2,061,364			2,208,253
Available for sale securities	11,937,149			11,492,489
Residential mortgage loans held for sale	87,572			68,054
Loans	0			0
Allowance for loan losses	0			0
Loans, net of allowance	0			0
Mortgage servicing rights	0			0
Derviative contracts, net of cash collateral, Assets, Fair value	350,531			878,233
Deposits with no stated maturity	0			0
Time deposits	0			0
Other borrowed funds	0			0
Subordinated debentures	112,501			121,497
Derivative contracts, net of cash collateral, Liabilities, Fair Value	550,649			554,884
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	0			0
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial real estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	0			0
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Loans to individuals [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	0			0
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | U.S. government securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	42,031			4,853
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Residential agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	5,334,372			4,406,848
Debt Securities, Held-to-maturity, gross	2,014,427			2,143,360
Available for sale securities	6,114,202			5,814,496
Fair value option securities	212,321			296,590
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Municipal securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	49,595			21,484
Debt Securities, Held-to-maturity, gross	17,567			38,106
Available for sale securities	491,715			624,500
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Other trading securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	11,403			26,006
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | U.S. Treasury [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	0			0
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Residential non-agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	699,178			577,576
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Securities, Held-to-maturity, gross	14,636			14,588
Available for sale securities	4,632,054			4,475,917
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Other debt securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Securities, Held-to-maturity, gross	14,734			12,199
Available for sale securities	0			0
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	0			0
Interest-bearing cash and cash equivalents	0			0
Trading securities	0			0
Debt Securities, Held-to-maturity, gross	124,020			138,515
Investment securities, Allowance for Credit Loss	0			0
Investment Securities, Amortized Cost, After Allowance for Credit Loss	124,020			138,515
Available for sale securities	473			473
Residential mortgage loans held for sale	7,248			7,218
Loans	22,846,124			21,891,223
Allowance for loan losses	0			0
Loans, net of allowance	22,846,124			21,891,223
Mortgage servicing rights	304,722			277,608
Derviative contracts, net of cash collateral, Assets, Fair value	0			0
Deposits with no stated maturity	30,588,466			33,018,863
Time deposits	2,672,789			1,431,245
Other borrowed funds	9,221,872			7,005,305
Subordinated debentures	0			0
Derivative contracts, net of cash collateral, Liabilities, Fair Value	0			0
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	14,428,246			13,905,765
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial real estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	4,839,799			4,454,048
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Loans to individuals [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	3,578,079			3,531,410
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | U.S. government securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0			0
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Residential agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0			0
Debt Securities, Held-to-maturity, gross	0			0
Available for sale securities	0			0
Fair value option securities	0			0
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Municipal securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0			0
Debt Securities, Held-to-maturity, gross	124,020			138,515
Available for sale securities	0			0
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Other trading securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0			0
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | U.S. Treasury [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	0			0
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Residential non-agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	0			0
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Securities, Held-to-maturity, gross	0			0
Available for sale securities	0			0
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Other debt securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Securities, Held-to-maturity, gross	0			0
Available for sale securities	$ 473			$ 473
[1]Carrying value includes $193 million of net unrealized loss which remains in Accumulated other comprehensive income ("AOCI") in the Consolidated Balance Sheets related to certain securities transferred during the second quarter of 2022 from the Available for Sale securities portfolio to the Investment securities portfolio.[2]Carrying value includes $225 million of net unrealized loss which remains in Accumulated other comprehensive income ("AOCI") in the Consolidated Balance Sheets related to certain securities transferred during the second quarter of 2022 from the Available for Sale securities portfolio to the Investment securities portfolio.