BOK Financial (BOKF) 10-Q 4 May 22 2022 Q1 Quarterly report Financial data

Document And Entity Information

Document And Entity Information	3 Months Ended
	Mar. 31, 2022shares
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
Current Fiscal Year End Date	--12-31
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	68,104,043
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q1
Document Type	10-Q
Entity File Number	001-37811
Amendment Flag	false
Document Period End Date	Mar. 31, 2022
City Area Code	918
Local Phone Number	588-6000
Entity Address, Postal Zip Code	74192

Consolidated Statements of Earn

Consolidated Statements of Earnings (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Interest revenue [Abstract]
Loans	$ 178,373	$ 197,574
Residential mortgage loans held for sale	1,394	1,380
Trading securities	40,975	35,922
Investment securities	2,354	2,726
Available for sale securities	57,932	58,608
Fair value option securities	491	496
Restricted equity securities	1,107	1,359
Interest-bearing cash and cash equivalents	473	174
Total interest revenue	283,099	298,239
Interest expense [Abstract]
Deposits	7,598	9,850
Borrowed funds	5,788	4,622
Subordinated debentures	1,302	3,347
Total interest expense	14,688	17,819
Net interest revenue	268,411	280,420
Provision for credit losses	0	(25,000)
Net interest revenue after provision for credit losses	268,411	305,420
Total fees and commissions	97,635	162,152
Other gains (losses), net	(1,644)	10,121
Loss on derivatives, net	(46,981)	(27,650)
Loss on fair value option securities, net	(11,201)	(1,910)
Change in fair value of mortgage servicing rights	49,110	33,874
Gain on available for sale securities, net	937	467
Total other operating revenue	87,856	177,054
Other operating expense [Abstract]
Personnel	159,228	173,010
Business promotion	6,513	2,154
Charitable contributions to BOKF Foundation	0	4,000
Professional fees and services	11,413	11,980
Net occupancy and equipment	30,855	26,662
Insurance	4,283	4,620
Data processing and communications	39,836	37,467
Printing, postage and supplies	3,689	3,440
Amortization of intangible assets	3,964	4,807
Mortgage banking costs	7,877	13,943
Other expense	9,960	13,701
Total other operating expense	277,618	295,784
Net income before taxes	78,649	186,690
Federal and state income taxes	16,197	42,382
Net income	62,452	144,308
Net loss attributable to non-controlling interests	(36)	(1,752)
Net income attributable to BOK Financial Corporation shareholders	$ 62,488	$ 146,060
Dividends declared per share	$ 0.53	$ 0.52
Earnings Per Share [Abstract]
Basic	0.91	2.10
Diluted	$ 0.91	$ 2.10
Average shares used in computation: [Abstract]
Basic	67,812,400	69,137,375
Diluted	67,813,851	69,141,710
Brokerage and trading revenue [Member]
Total fees and commissions	$ (27,079)	$ 20,782
Transaction card revenue [Member]
Total fees and commissions	24,216	22,430
Fiduciary and asset management revenue [Member]
Total fees and commissions	46,399	41,322
Deposit service charges and fees [Member]
Total fees and commissions	27,004	24,209
Mortgage banking revenue [Member]
Total fees and commissions	16,650	37,113
Other revenue [Member]
Total fees and commissions	$ 10,445	$ 16,296

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 62,452	$ 144,308
Other Comprehensive Income (Loss), before Tax [Abstract]
Net change in unrealized gain (loss)	(639,041)	(150,131)
Reclassification Adjustments Included in Earnings [Abstract]
Gain on available for sale securities, net	(937)	(467)
Other comprehensive loss before income taxes	(639,978)	(150,598)
Federal and state income taxes	(149,781)	(36,139)
Other comprehensive loss, net of income taxes	(490,197)	(114,459)
Comprehensive income (loss)	(427,745)	29,849
Comprehensive loss attributable to non-controlling interests	(36)	(1,752)
Comprehensive income (loss) attributable to BOK Financial Corp. shareholders	$ (427,709)	$ 31,601

Consolidated Balance Sheets (Un

Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Assets [Abstract]
Cash and due from banks	$ 767,805	$ 712,067
Interest-bearing cash and cash equivalents	599,976	2,125,343
Trading securities	4,891,096	9,136,813
Investment securities, net of allowance	183,824	210,444
Available for sale securities	12,894,534	13,157,817
Fair value option securities	185,003	43,770
Restricted equity securities	77,389	83,113
Residential mortgage loans held for sale	169,474	192,295
Loans and Leases Receivable, Gross	20,674,429	20,205,680
Allowance for loan losses	(246,473)	(256,421)
Loans, net of allowance	20,427,956	19,949,259
Premises and equipment, net	574,786	574,148
Receivables	238,694	223,021
Goodwill	1,044,749	1,044,749
Intangible assets, net	87,761	91,778
Mortgage servicing rights	209,563	163,198
Real estate and other repossessed assets, net of allowance	24,492	24,589
Derivative contracts, net	2,680,207	1,097,297
Cash surrender value of bank-owned life insurance	407,763	405,607
Receivable on unsettled securities sales	229,404	56,172
Other assets	1,132,031	957,951
Total assets	46,826,507	50,249,431
Deposits [Abstract]
Noninterest-bearing demand deposits	15,242,341	15,344,423
Interest-bearing deposits: [Abstract]
Transaction	21,689,829	23,268,573
Savings	979,365	924,735
Time	1,514,416	1,704,328
Total deposits	39,425,951	41,242,059
Funds purchased and repurchase agreements	1,068,329	2,326,449
Other borrowings	36,246	36,753
Subordinated debentures	131,209	131,226
Accrued interest, taxes and expense	238,048	273,041
Derivative contracts, net	557,834	275,625
Due on unsettled securities purchases	81,016	160,686
Other liabilities	434,350	435,221
Total liabilities	41,972,983	44,881,060
Shareholders' equity: [Abstract]
Common stock	5	5
Capital surplus	1,381,666	1,378,794
Retained earnings	4,473,884	4,447,691
Treasury stock	(588,147)	(535,129)
Accumulated other comprehensive gain (loss)	(417,826)	72,371
Total shareholders’ equity	4,849,582	5,363,732
Non-controlling interests	3,942	4,639
Total equity	4,853,524	5,368,371
Total liabilities and equity	$ 46,826,507	$ 50,249,431

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Investment securities [Abstract]
Investment Securities, Fair Value	$ 191,235	$ 231,395
Real estate and other repossessed assets, allowance	$ (5,977)	$ (6,083)
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	(76,412,230)	(76,254,029)
Common Stock, Shares, Outstanding	(76,412,230)	(76,254,029)
Treasury Stock, Shares	8,308,187	7,786,257

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 [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total Shareholders' Equity [Member]	Non-Controlling Interests [Member]
Balance, beginning of period (in shares) at Dec. 31, 2020		75,995			6,358
Balance, beginning of period at Dec. 31, 2020	$ 5,291,561	$ 5	$ 1,368,062	$ 3,973,675	$ (411,344)	$ 335,868	$ 5,266,266	$ 25,295
Net income	144,308			146,060			146,060	(1,752)
Other comprehensive income (loss)	(114,459)					(114,459)	(114,459)
Repurchase of common stock (in shares)					260
Repurchase of common stock	(20,071)				$ (20,071)		(20,071)
Stock options exercised (in shares)		17
Stock options exercised	949		949				949
Non-vested shares awarded, net (in shares)		232
Vesting of non-vested shares (in shares)					68
Vesting of non-vested shares	(5,815)				$ (5,815)		(5,815)
Share-based compensation	2,724		2,724				2,724
Cash dividends on common stock	(36,192)			(36,192)			(36,192)
Capital calls and distributions, net	(661)							(661)
Balance, end of period (in shares) at Mar. 31, 2021		76,244			6,686
Balance, end of period at Mar. 31, 2021	5,262,344	$ 5	1,371,735	4,083,543	$ (437,230)	221,409	5,239,462	22,882
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	62,452			62,488			62,488	(36)
Other comprehensive income (loss)	(490,197)					(490,197)	(490,197)
Repurchase of common stock (in shares)					476
Repurchase of common stock	(48,074)				$ (48,074)		(48,074)
Stock options exercised (in shares)		1
Stock options exercised	37		37				37
Non-vested shares awarded, net (in shares)		157
Vesting of non-vested shares (in shares)					46
Vesting of non-vested shares	(4,944)				$ (4,944)		(4,944)
Share-based compensation	2,835		2,835				2,835
Cash dividends on common stock	(36,295)			(36,295)			(36,295)
Capital calls and distributions, net	(661)							(661)
Balance, end of period (in shares) at Mar. 31, 2022		76,412			8,308
Balance, end 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

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash Flows From Operating Activities: [Abstract]
Net income	$ 62,452	$ 144,308
Adjustments to reconcile net income to net cash used in operating activities: [Abstract]
Provision for credit losses	0	(25,000)
Change in fair value of mortgage servicing rights due to market assumption changes	(49,110)	(33,874)
Change in the fair value of mortgage servicing rights due to principal payments	7,960	11,961
Net unrealized (gains) losses from derivative contracts	(31,298)	92,502
Share-based compensation	2,835	2,724
Depreciation and amortization	26,091	24,918
Net amortization of discounts and premiums	3,216	4,853
Net losses (gains) on financial instruments and other losses (gains), net	706	(10,587)
Net gain on mortgage loans held for sale	(1,056)	(19,045)
Mortgage loans originated for sale	(418,866)	(843,053)
Proceeds from sale of mortgage loans held for sale	446,742	836,209
Capitalized mortgage servicing rights	(5,215)	(9,830)
Change in trading and fair value option securities	4,104,453	(335,624)
Change in receivables	(88,559)	15,650
Change in other assets	(19,589)	(24,991)
Change in other liabilities	(107,508)	(49,998)
Net cash provided by (used in) operating activities	3,933,254	(218,877)
Cash Flows From Investing Activities: [Abstract]
Proceeds from maturities or redemptions of investment securities	26,363	18,624
Proceeds from maturities or redemptions of available for sale securities	723,730	877,257
Purchases of available for sale securities	(1,161,606)	(1,451,909)
Proceeds from sales of available for sale securities	55,185	56,037
Change in amount receivable on unsettled available for sale securities transactions	(99,944)	(26,130)
Loans originated, net of principal collected	(460,128)	498,667
Net payments on derivative asset contracts	34,855	(7,016)
Net change in restricted equity securities	5,724	31,777
Proceeds from disposition of assets	9,708	43,739
Purchases of assets	(37,569)	(63,110)
Net cash provided by (used in) investing activities	(903,682)	(22,064)
Cash Flows From Financing Activities: [Abstract]
Net change in demand deposits, transaction deposits and savings accounts	(1,626,196)	1,671,518
Net change in time deposits	(189,912)	37,228
Proceeds from (Repayments of) Other Debt	(1,271,195)	(1,078,174)
Net proceeds on derivative liability contracts	(30,779)	8,437
Net change in derivative margin accounts	(1,274,645)	2,995
Change in amount due on unsettled available for sale securities transactions	(17,198)	(101,311)
Issuance of common and treasury stock, net	(4,907)	(4,866)
Repurchase of common stock	(48,074)	(20,071)
Dividends paid	(36,295)	(36,192)
Net cash provided by (used in) financing activities	(4,499,201)	479,564
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	(1,469,629)	238,623
Cash and cash equivalents at beginning of period	2,837,410	1,180,573
Cash and cash equivalents at end of period	1,367,781	1,419,196
Supplemental Cash Flow Information: [Abstract]
Cash paid for interest	13,982	16,743
Cash paid for taxes	858	852
Net loans and bank premises transferred to repossessed real estate and other assets	64	147
Residential mortgage loans guaranteed by U.S. government agencies that became eligible for repurchase during the period	12,568	36,496
Conveyance of other real estate owned guaranteed by U.S. government agencies	1,812	1,448
Right-of-use assets obtained in exchange for operating lease liabilities	$ 9,241	$ 1,191

Significant Accounting Policies

Significant Accounting Policies	3 Months Ended
	Mar. 31, 2022
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 2021 Form 10-K filed with the Securities and Exchange Commission, which contains audited financial statements. Amounts presented as of December 31, 2021 have been derived from the audited financial statements included in BOK Financial’s 2021 Form 10-K but do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. Operating results for the three-month period ended March 31, 2022 are not necessarily indicative of the results that may be expected for the year ending December 31, 2022. Newly Adopted and Pending Accounting Policies Financial Accounting Standards Board (“FASB”) FASB Accounting Standards Update No. 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting ("ASU 2020-04") On March 12, 2020, the FASB issued ASU 2020-04 which provides optional expedients and exceptions for applying U.S. GAAP to contract modifications and hedging relationships that reference LIBOR or another reference rate expected to be discontinued, subject to meeting certain criteria. Under the new guidance, an entity can elect by accounting topic or industry subtopic to account for the modification of a contract affected by reference rate reform as a continuation of the existing contract, if certain conditions are met. In addition, the new guidance allows an entity to elect on a hedge-by-hedge basis to continue to apply hedge accounting for hedging relationships in which the critical terms change due to reference rate reform, if certain conditions are met. A one-time election to sell and/or transfer held-to-maturity debt securities that reference a rate affected by reference rate reform is also allowed. ASU 2020-04 became effective for all entities as of March 12, 2020 and will apply to all LIBOR reference rate modifications through December 31, 2022. Adoption of ASU 2020-04 did not have a material impact on the Company's financial statements. FASB Accounting Standards Update No. 2021-01, Reference Rate Reform (Topic 848): Scope ("ASU 2021-01") On January 7, 2021, the FASB issued ASU 2021-01 which clarifies that certain optional expedients and exceptions in Topic 848 for contract modifications and hedge accounting apply to derivatives that are affected by the discounting transition. The amendments in this update are elective and apply to all entities that have derivative instruments that use an interest rate for margining, discounting, or contract price alignment that is modified as a result of reference rate reform. The amendments also optionally apply to all entities that designate receive-variable rate, pay-variable-rate cross-currency interest rate swaps as hedging instruments in net investment hedges that are modified as a result of reference rate reform. ASU 2021-01 is effective immediately for all entities and amendments may be applied on a full retrospective basis as of any date from the beginning of an interim period that includes or is subsequent to March 12, 2020. Adoption of ASU 2021-01 did not have a material impact on the Company's financial statements. 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 is effective for fiscal years beginning after December 15, 2022 and amendments related to TDR recognition and measurement may be applied using either a prospective or modified retrospective transition method, while amendments on TDR and vintage disclosures are to be adopted prospectively. Management is currently evaluating the impact of ASU 2022-02 on the Company's financial statements.

Securities

Securities	3 Months Ended
	Mar. 31, 2022
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): March 31, 2022 December 31, 2021 Fair Value Net Unrealized Gain (Loss) Fair Value Net Unrealized Gain (Loss) U.S. government securities $ 13,513 $ (10) $ 23,610 $ 40 Residential agency mortgage-backed securities 4,827,504 (135,438) 9,068,900 (9,338) Municipal securities 24,539 (478) 25,783 34 Other trading securities 25,540 (148) 18,520 (26) Total trading securities $ 4,891,096 $ (136,074) $ 9,136,813 $ (9,290) Investment Securities The amortized cost and fair values of investment securities are as follows (in thousands): March 31, 2022 Amortized Fair Gross Unrealized Cost Value Gain Loss Municipal securities $ 177,683 $ 184,214 $ 7,155 $ (624) Residential agency mortgage-backed securities 6,486 6,741 283 (28) Other debt securities 288 280 — (8) Total investment securities 184,457 191,235 7,438 (660) Allowance for credit losses (633) Investment securities, net of allowance $ 183,824 $ 191,235 $ 7,438 $ (660) December 31, 2021 Amortized Fair Gross Unrealized Cost Value Gain Loss Municipal securities $ 203,772 $ 223,609 $ 19,851 $ (14) Residential agency mortgage-backed securities 6,939 7,500 561 — Other debt securities 288 286 — (2) Total investment securities 210,999 231,395 20,412 (16) Allowance for credit losses (555) Investment securities, net of allowance $ 210,444 $ 231,395 $ 20,412 $ (16) The amortized cost and fair values of investment securities at March 31, 2022, 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 $ 14,901 $ 104,681 $ 52,359 $ 6,030 $ 177,971 4.55 Fair value 15,080 110,636 52,834 5,944 184,494 Residential mortgage-backed securities: Amortized cost $ 6,486 2 Fair value 6,741 Total investment securities: Amortized cost $ 184,457 Fair value 191,235 1 Expected maturities may differ from contractual maturities, because borrowers may have the right to call or prepay obligations with or without penalty. 2 The average expected lives of residential mortgage-backed securities were 4.4 years based upon current prepayment assumptions. Temporarily Impaired Investment Securities (in thousands): March 31, 2022 Number of Securities Less Than 12 Months 12 Months or Longer Total Fair Unrealized Fair Unrealized Fair Unrealized Investment: Municipal securities 35 $ 22,394 $ 566 $ 544 $ 58 $ 22,938 $ 624 Residential agency mortgage-backed securities 1 1,534 28 — — 1,534 28 Other debt securities 2 243 7 24 1 267 8 Total investment securities 38 $ 24,171 $ 601 $ 568 $ 59 $ 24,739 $ 660 December 31, 2021 Number of Securities Less Than 12 Months 12 Months or Longer Total Fair Unrealized Fair Unrealized Fair Unrealized Investment: Municipal securities 1 $ — $ — $ 587 $ 14 $ 587 $ 14 Other debt securities 2 273 2 — — 273 2 Total investment securities 3 $ 273 $ 2 $ 587 $ 14 $ 860 $ 16 Available for Sale Securities The amortized cost and fair value of available for sale securities are as follows (in thousands): March 31, 2022 Amortized Fair Gross Unrealized Cost Value Gain Loss U.S. Treasury $ 1,000 $ 947 $ — $ (53) Municipal securities 562,065 526,322 144 (35,887) Mortgage-backed securities: Residential agency 7,913,760 7,612,021 14,727 (316,466) Residential non-agency 339,904 347,187 13,279 (5,996) Commercial agency 4,623,902 4,407,585 2,809 (219,126) Other debt securities 500 472 — (28) Total available for sale securities $ 13,441,131 $ 12,894,534 $ 30,959 $ (577,556) December 31, 2021 Amortized Fair Gross Unrealized Cost Value Gain Loss U.S. Treasury $ 1,001 $ 1,000 $ — $ (1) Municipal securities 515,551 508,365 1,302 (8,488) Mortgage-backed securities: Residential agency 7,908,587 8,006,616 155,477 (57,448) Residential non-agency 10,625 24,339 13,714 — Commercial agency 4,628,172 4,617,025 36,868 (48,015) Other debt securities 500 472 — (28) Total available for sale securities $ 13,064,436 $ 13,157,817 $ 207,361 $ (113,980) The amortized cost and fair values of available for sale securities at March 31, 2022, 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 $ 48,510 $ 1,968,389 $ 2,683,456 $ 487,112 $ 5,187,467 6.59 Fair value 48,612 1,911,239 2,507,611 467,864 4,935,326 Residential mortgage-backed securities: Amortized cost $ 8,253,664 2 Fair value 7,959,208 Total available for sale securities: Amortized cost $ 13,441,131 Fair value 12,894,534 1 Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without penalty. 2 The average expected lives of residential mortgage-backed securities were 4.3 years based upon current prepayment assumptions. Sales of available for sale securities resulted in gains and losses as follows (in thousands): Three Months Ended 2022 2021 Proceeds $ 55,185 $ 56,037 Gross realized gains 1,933 473 Gross realized losses (996) (6) Related federal and state income tax expense 219 119 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 $10.0 billion at March 31, 2022 and $10.2 billion at December 31, 2021. The secured parties do not have the right to sell or repledge these securities. Temporarily Impaired Available for Sale Securities (in thousands) March 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 $ 947 $ 53 $ — $ — $ 947 $ 53 Municipal securities 202 $ 400,690 $ 26,297 $ 111,502 $ 9,590 $ 512,192 $ 35,887 Mortgage-backed securities: Residential agency 508 5,127,508 191,126 1,412,323 125,340 6,539,831 316,466 Residential non-agency 15 304,149 5,996 — — 304,149 5,996 Commercial agency 238 2,988,497 177,409 773,363 41,717 3,761,860 219,126 Other debt securities 1 — — 472 28 472 28 Total available for sale securities 965 $ 8,821,791 $ 400,881 $ 2,297,660 $ 176,675 $ 11,119,451 $ 577,556 December 31, 2021 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 $ 1,000 $ 1 $ — $ — $ 1,000 $ 1 Municipal securities 175 $ 423,575 $ 7,762 $ 22,476 $ 726 $ 446,051 $ 8,488 Mortgage-backed securities: Residential agency 120 2,382,094 37,121 750,044 20,327 3,132,138 57,448 Commercial agency 165 2,104,689 35,488 703,216 12,527 2,807,905 48,015 Other debt securities 1 — — 472 28 472 28 Total available for sale securities 462 $ 4,911,358 $ 80,372 $ 1,476,208 $ 33,608 $ 6,387,566 $ 113,980 Based on evaluations of impaired securities as of March 31, 2022, 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): March 31, 2022 December 31, 2021 Fair Value Net Unrealized Gain (Loss) Fair Value Net Unrealized Gain (Loss) Residential agency mortgage-backed securities $ 185,003 $ (4,017) $ 43,770 $ 1,591

Derivatives

Derivatives	3 Months Ended
	Mar. 31, 2022
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 reduced 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 March 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 $ 2,901,463 $ 69,287 $ (6,285) $ 63,002 $ (24,595) $ 38,407 Energy contracts 8,010,126 2,683,519 (541,826) 2,141,693 (12,281) 2,129,412 Agricultural contracts — — — — — — Foreign exchange contracts 180,648 179,024 — 179,024 (715) 178,309 Equity option contracts 39,984 896 — 896 (300) 596 Total customer risk management programs 11,132,221 2,932,726 (548,111) 2,384,615 (37,891) 2,346,724 Trading 29,002,117 550,075 (218,429) 331,646 (96) 331,550 Internal risk management programs 200,000 1,933 — 1,933 — 1,933 Total derivative contracts $ 40,334,338 $ 3,484,734 $ (766,540) $ 2,718,194 $ (37,987) $ 2,680,207 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 $ 2,901,463 $ 69,334 $ (6,285) $ 63,049 $ (61) $ 62,988 Energy contracts 8,069,893 2,712,617 (541,826) 2,170,791 (2,159,402) 11,389 Agricultural contracts — — — — — — Foreign exchange contracts 179,447 177,609 — 177,609 — 177,609 Equity option contracts 39,984 896 — 896 — 896 Total customer risk management programs 11,190,787 2,960,456 (548,111) 2,412,345 (2,159,463) 252,882 Trading 26,298,226 525,699 (218,429) 307,270 (15,474) 291,796 Internal risk management programs 394,216 13,156 — 13,156 — 13,156 Total derivative contracts $ 37,883,229 $ 3,499,311 $ (766,540) $ 2,732,771 $ (2,174,937) $ 557,834 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, 2021 (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 $ 2,614,162 $ 53,881 $ (10,101) $ 43,780 $ — $ 43,780 Energy contracts 6,360,095 1,168,363 (375,624) 792,739 — 792,739 Agricultural contracts — — — — — — Foreign exchange contracts 216,272 215,148 — 215,148 — 215,148 Equity option contracts 42,136 755 — 755 (242) 513 Total customer risk management programs 9,232,665 1,438,147 (385,725) 1,052,422 (242) 1,052,180 Trading 35,592,751 139,694 (104,326) 35,368 (721) 34,647 Internal risk management programs 869,506 10,687 (217) 10,470 — 10,470 Total derivative contracts $ 45,694,922 $ 1,588,528 $ (490,268) $ 1,098,260 $ (963) $ 1,097,297 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 $ 2,614,162 $ 54,062 $ (10,101) $ 43,961 $ (33,870) $ 10,091 Energy contracts 6,480,840 1,210,946 (375,624) 835,322 (803,102) 32,220 Agricultural contracts — — — — — — Foreign exchange contracts 208,381 207,119 — 207,119 (447) 206,672 Equity option contracts 42,136 755 — 755 — 755 Total customer risk management programs 9,345,519 1,472,882 (385,725) 1,087,157 (837,419) 249,738 Trading 41,285,649 152,947 (104,326) 48,621 (24,074) 24,547 Internal risk management programs 298,832 1,557 (217) 1,340 — 1,340 Total derivative contracts $ 50,930,000 $ 1,627,386 $ (490,268) $ 1,137,118 $ (861,493) $ 275,625 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 March 31, 2022 March 31, 2021 Brokerage Gain (Loss) on Derivatives, Net Brokerage Gain (Loss) on Derivatives, Net Customer risk management programs: Interest rate contracts $ 6,342 $ — $ 1,388 $ — Energy contracts 4,449 — 1,020 — Agricultural contracts — — 18 — Foreign exchange contracts 148 — 166 — Equity option contracts — — — — Total customer risk management programs 10,939 — 2,592 — Trading 1 31,074 — (71,259) — Internal risk management programs — (46,981) — (27,650) Total derivative contracts $ 42,013 $ (46,981) $ (68,667) $ (27,650) 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	3 Months Ended
	Mar. 31, 2022
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. Loans to borrowers experiencing financial difficulties may be modified in troubled debt restructurings ("TDRs"). Primarily all TDRs are classified as nonaccruing, excluding loans guaranteed by U.S. government agencies. Modifications generally consist of extension of payment terms or interest rate concessions and may result 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. 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 TDR. The charge-off amount is determined through a quarterly evaluation of available cash resources and collateral value. 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 TDRs 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): March 31, 2022 December 31, 2021 Fixed Variable Non-accrual Total Fixed Variable Non-accrual Total Commercial $ 3,343,185 $ 9,479,667 $ 60,337 $ 12,883,189 $ 3,360,117 $ 9,072,244 $ 74,104 $ 12,506,465 Commercial real estate 924,332 3,160,635 15,989 4,100,956 929,015 2,888,048 14,262 3,831,325 Paycheck protection program 137,365 — — 137,365 276,341 — — 276,341 Loans to individuals 2,006,029 1,498,970 47,920 3,552,919 2,037,792 1,508,064 45,693 3,591,549 Total $ 6,410,911 $ 14,139,272 $ 124,246 $ 20,674,429 $ 6,603,265 $ 13,468,356 $ 134,059 $ 20,205,680 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 March 31, 2022, outstanding commitments totaled $12.5 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 March 31, 2022, outstanding standby letters of credit totaled $654 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, 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 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 March 31, 2022 Commercial Commercial Real Estate Paycheck Protection Program Loans to Individuals Total Allowance for loan losses: Beginning balance $ 162,056 $ 58,553 $ — $ 35,812 $ 256,421 Provision for loan losses (5,118) 468 — 683 (3,967) Loans charged off (6,081) (191) — (1,533) (7,805) Recoveries of loans previously charged off 591 144 — 1,089 1,824 Ending Balance $ 151,448 $ 58,974 $ — $ 36,051 $ 246,473 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 154 3,023 — 91 3,268 Ending Balance $ 13,966 $ 20,465 $ — $ 1,814 $ 36,245 Three Months Ended March 31, 2021 Commercial Commercial Real Estate Paycheck Protection Program Loans to Individuals Total Allowance for loan losses: Beginning balance $ 254,934 $ 86,558 $ — $ 47,148 $ 388,640 Provision for loan losses (9,893) (4,579) — (7,298) (21,770) Loans charged off (15,345) (263) — (1,297) (16,905) Recoveries of loans previously charged off 1,676 30 — 731 2,437 Ending Balance $ 231,372 $ 81,746 $ — $ 39,284 $ 352,402 Allowance for off-balance sheet credit risk from unfunded loan commitments: Beginning balance $ 14,422 $ 20,571 $ — $ 1,928 $ 36,921 Provision for off-balance sheet credit risk (1,686) (2,273) — (85) (4,044) Ending Balance $ 12,736 $ 18,298 $ — $ 1,843 $ 32,877 Changes in our reasonable and supportable forecasts of macroeconomic variables resulted in a $7.3 million negative provision for credit losses related to lending activities during the first quarter of 2022. Continued strength in commodity prices was partially offset by changes in our economic outlook. Changes in the loan portfolio characteristics, including specific impairment and losses, loan balances, risk grading and changes in payment profile resulted in a $6.6 million provision for credit losses related to lending activities. The allowance for loan losses and recorded investment of the related loans by portfolio segment for each measurement method at March 31, 2022 is as follows (in thousands): Collectively Measured Individually Measured Total Recorded Investment Related Allowance Recorded Investment Related Allowance Recorded Investment Related Commercial $ 12,822,852 $ 149,095 $ 60,337 $ 2,353 $ 12,883,189 $ 151,448 Commercial real estate 4,084,967 58,039 15,989 935 4,100,956 58,974 Paycheck protection program 137,365 — — — 137,365 — Loans to individuals 3,504,999 36,051 47,920 — 3,552,919 36,051 Total $ 20,550,183 $ 243,185 $ 124,246 $ 3,288 $ 20,674,429 $ 246,473 The allowance for loan losses and recorded investment of the related loans by portfolio segment for each measurement method at December 31, 2021 is as follows (in thousands): Collectively Measured Individually Measured Total Recorded Investment Related Allowance Recorded Investment Related Allowance Recorded Investment Related Commercial $ 12,432,361 $ 158,063 $ 74,104 $ 3,993 $ 12,506,465 $ 162,056 Commercial real estate 3,817,063 56,204 14,262 2,349 3,831,325 58,553 Paycheck protection program 276,341 — — — 276,341 — Loans to individuals 3,545,856 35,812 45,693 — 3,591,549 35,812 Total $ 20,071,621 $ 250,079 $ 134,059 $ 6,342 $ 20,205,680 $ 256,421 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 identified 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 March 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 $ 102,694 $ 156,167 $ 48,775 $ 15,678 $ 11,925 $ 8,450 $ 2,753,419 $ — $ 3,097,108 Special Mention — 551 642 — — — 1,090 — 2,283 Accruing Substandard — — — 1,139 693 705 60,863 9,900 73,300 Nonaccrual — — 19,404 — — 602 4,970 — 24,976 Total energy 102,694 156,718 68,821 16,817 12,618 9,757 2,820,342 9,900 3,197,667 Healthcare Pass 140,071 574,892 549,379 514,779 483,909 933,344 168,255 24 3,364,653 Special Mention — 6,787 — 15,417 — 5,712 5 — 27,921 Accruing Substandard — — — 26,973 — 7,109 — — 34,082 Nonaccrual — — — — 6,542 8,534 — — 15,076 Total healthcare 140,071 581,679 549,379 557,169 490,451 954,699 168,260 24 3,441,732 Services Pass 54,992 634,506 361,724 266,054 246,336 933,399 779,824 567 3,277,402 Special Mention — 415 6,326 1,989 1,006 95 22,419 182 32,432 Accruing Substandard — 10 499 4,002 10,579 2,990 7,046 — 25,126 Nonaccrual — — — — — 16,145 390 — 16,535 Total services 54,992 634,931 368,549 272,045 257,921 952,629 809,679 749 3,351,495 General business Pass 209,407 547,777 220,861 250,546 167,570 356,548 1,102,054 1,981 2,856,744 Special Mention — — 137 — 1,374 2,975 8,100 — 12,586 Accruing Substandard — 215 957 1,139 5,673 9,231 2,000 — 19,215 Nonaccrual — — 1,111 799 1,004 24 800 12 3,750 Total general business 209,407 547,992 223,066 252,484 175,621 368,778 1,112,954 1,993 2,892,295 Total commercial 507,164 1,921,320 1,209,815 1,098,515 936,611 2,285,863 4,911,235 12,666 12,883,189 Commercial real estate: Pass 279,254 921,473 695,399 826,150 398,633 820,481 107,780 25 4,049,195 Special Mention — — — — — 18,942 — — 18,942 Accruing Substandard — — — — 13,501 3,329 — — 16,830 Nonaccrual — — — 7,908 — 8,081 — — 15,989 Total commercial real estate 279,254 921,473 695,399 834,058 412,134 850,833 107,780 25 4,100,956 Origination Year 2022 2021 2020 2019 2018 Prior Revolving Loans Revolving Loans Converted to Term Loans Total Paycheck protection program: Pass — 113,697 23,668 — — — — — 137,365 Total paycheck protection program — 113,697 23,668 — — — — — 137,365 Loans to individuals: Residential mortgage Pass 77,813 393,077 427,965 70,900 48,809 330,626 320,350 21,887 1,691,427 Special Mention — 35 — 17 145 284 552 210 1,243 Accruing Substandard — — — — — 53 26 — 79 Nonaccrual 35 1,517 2,571 356 2,057 21,653 1,903 665 30,757 Total residential mortgage 77,848 394,629 430,536 71,273 51,011 352,616 322,831 22,762 1,723,506 Residential mortgage guaranteed by U.S. government agencies Pass — 1,080 11,379 15,778 23,480 253,872 — — 305,589 Nonaccrual — — — 2,081 1,746 13,165 — — 16,992 Total residential mortgage guaranteed by U.S. government agencies — 1,080 11,379 17,859 25,226 267,037 — — 322,581 Personal: Pass 40,789 219,748 171,964 174,523 70,349 214,736 613,114 598 1,505,821 Special Mention — 49 23 — 15 42 15 — 144 Accruing Substandard — 524 — 165 — — 7 — 696 Nonaccrual — 14 19 10 22 42 64 — 171 Total personal 40,789 220,335 172,006 174,698 70,386 214,820 613,200 598 1,506,832 Total loans to individuals 118,637 616,044 613,921 263,830 146,623 834,473 936,031 23,360 3,552,919 Total loans $ 905,055 $ 3,572,534 $ 2,542,803 $ 2,196,403 $ 1,495,368 $ 3,971,169 $ 5,955,046 $ 36,051 $ 20,674,429 The following table summarizes the Company’s loan portfolio at December 31, 2021 by the risk grade categories and vintage (in thousands): Origination Year 2021 2020 2019 2018 2017 Prior Revolving Loans Revolving Loans Converted to Term Loans Total Commercial: Energy Pass $ 252,133 $ 29,556 $ 15,914 $ 13,548 $ 4,741 $ 6,765 $ 2,540,525 $ — $ 2,863,182 Special Mention 558 771 — — — — 750 — 2,079 Accruing Substandard 10,650 22,611 1,185 814 — 716 74,556 — 110,532 Nonaccrual — 20,487 — — — 714 9,890 — 31,091 Total energy 263,341 73,425 17,099 14,362 4,741 8,195 2,625,721 — 3,006,884 Healthcare Pass 563,800 589,193 516,558 498,998 319,096 688,136 160,154 26 3,335,961 Special Mention 6,835 — 15,583 — 11,135 — 5 — 33,558 Accruing Substandard — — 27,135 543 — 1,981 — — 29,659 Nonaccrual — — — 6,542 — 8,711 509 — 15,762 Total healthcare 570,635 589,193 559,276 506,083 330,231 698,828 160,668 26 3,414,940 Services Pass 696,149 405,057 289,375 275,010 225,404 795,029 607,958 375 3,294,357 Special Mention 434 405 1,830 1,047 3,290 47 17,210 192 24,455 Accruing Substandard 43 530 4,166 10,714 1,785 2,366 11,607 — 31,211 Nonaccrual — — — 230 13,918 2,519 503 — 17,170 Total services 696,626 405,992 295,371 287,001 244,397 799,961 637,278 567 3,367,193 General business Pass 584,438 211,892 264,462 177,384 168,977 215,014 1,047,420 2,284 2,671,871 Special Mention 218 223 60 1,435 3,842 — 5,875 — 11,653 Accruing Substandard 265 1,066 1,634 7,697 8,336 3,024 1,821 — 23,843 Nonaccrual — 2,444 4,562 1,046 762 518 730 19 10,081 Total general business 584,921 215,625 270,718 187,562 181,917 218,556 1,055,846 2,303 2,717,448 Total commercial 2,115,523 1,284,235 1,142,464 995,008 761,286 1,725,540 4,479,513 2,896 12,506,465 Commercial real estate: Pass 717,400 711,231 871,283 403,115 279,058 664,684 117,847 31 3,764,649 Special Mention — — — 6,660 10,898 9,244 — — 26,802 Accruing Substandard — — — 13,352 4,480 7,780 — — 25,612 Nonaccrual — — 8,076 — — 6,186 — — 14,262 Total commercial real estate 717,400 711,231 879,359 423,127 294,436 687,894 117,847 31 3,831,325 Origination Year 2021 2020 2019 2018 2017 Prior Revolving Loans Revolving Loans Converted to Term Loans Total Paycheck protection program: Pass 237,357 38,984 — — — — — — 276,341 Total paycheck protection program 237,357 38,984 — — — — — — 276,341 Loans to individuals: Residential mortgage Pass 386,092 452,537 84,001 60,390 68,150 295,632 320,638 21,463 1,688,903 Special Mention — — 156 — 19 411 282 159 1,027 Accruing Substandard 98 — — — 127 41 400 — 666 Nonaccrual 1,516 1,809 383 1,968 629 22,289 2,177 803 31,574 Total residential mortgage 387,706 454,346 84,540 62,358 68,925 318,373 323,497 22,425 1,722,170 Residential mortgage guaranteed by U.S. government agencies Pass 699 11,380 20,650 27,970 32,742 246,871 — — 340,312 Nonaccrual — — 1,259 821 635 11,146 — — 13,861 Total residential mortgage guaranteed by U.S. government agencies 699 11,380 21,909 28,791 33,377 258,017 — — 354,173 Personal: Pass 218,960 180,577 177,389 70,249 92,592 135,041 638,713 728 1,514,249 Special Mention — 9 34 3 — 47 — — 93 Accruing Substandard 435 5 165 — — 1 — — 606 Nonaccrual 110 14 10 24 35 40 25 — 258 Total personal 219,505 180,605 177,598 70,276 92,627 135,129 638,738 728 1,515,206 Total loans to individuals 607,910 646,331 284,047 161,425 194,929 711,519 962,235 23,153 3,591,549 Total loans $ 3,678,190 $ 2,680,781 $ 2,305,870 $ 1,579,560 $ 1,250,651 $ 3,124,953 $ 5,559,595 $ 26,080 $ 20,205,680 Nonaccruing Loans A summary of nonaccruing loans at March 31, 2022 follows (in thousands): As of March 31, 2022 Total With No With Allowance Related Allowance Commercial: Energy $ 24,976 $ 24,976 $ — $ — Healthcare 15,076 8,534 6,542 946 Services 16,535 13,290 3,245 1,407 General business 3,750 3,750 — — Total commercial 60,337 50,550 9,787 2,353 Commercial real estate 15,989 8,081 7,908 935 Loans to individuals: Residential mortgage 30,757 30,757 — — Residential mortgage guaranteed by U.S. government agencies 16,992 16,992 — — Personal 171 171 — — Total loans to individuals 47,920 47,920 — — Total $ 124,246 $ 106,551 $ 17,695 $ 3,288 A summary of nonaccruing loans at December 31, 2021 follows (in thousands): As of December 31, 2021 Total With No With Allowance Related Allowance Commercial: Energy $ 31,091 $ 31,091 $ — $ — Healthcare 15,762 9,679 6,083 53 Services 17,170 13,686 3,484 2,584 General business 10,081 7,690 2,391 1,357 Total commercial 74,104 62,146 11,958 3,994 Commercial real estate 14,262 6,186 8,076 2,349 Loans to individuals: Residential mortgage 31,574 31,574 — — Residential mortgage guaranteed by U.S. government agencies 13,861 13,861 — — Personal 258 258 — — Total loans to individuals 45,693 45,693 — — Total $ 134,059 $ 114,025 $ 20,034 $ 6,343 Troubled Debt Restructurings At March 31, 2022 the Company had $260 million in troubled debt restructurings ("TDRs"), of which $204 million were accruing residential mortgage loans guaranteed by U.S. government agencies, $20 million were nonaccruing residential mortgage loans with no specific allowance necessary and $12 million were commercial real estate loans with a related specific allowance of $935 thousand. Of the approximately $124 million of TDRs that are performing in accordance with the modified terms, $92 million are government guaranteed loans. At December 31, 2021, the Company had $273 million in TDRs, of which $211 million were accruing residential mortgage loans guaranteed by U.S. government agencies. Of the approximately $141 million of TDRs that were performing in accordance with the modified terms, $97 million are government guaranteed loans. TDRs generally consist of interest rate concessions, payment stream concessions or a combination of concessions to distressed borrowers. During the three months ended March 31, 2022, $18 million of loans were restructured and $3 thousand of loans designated as TDRs were charged off. During the three months ended March 31, 2021, $13 million of loans were restructured and $306 thousand of loans designated as TDRs were charged off. Past Due Loans Past due status for all loan classes is based on the act

Mortgage Banking Activities

Mortgage Banking Activities	3 Months Ended
	Mar. 31, 2022
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): March 31, 2022 December 31, 2021 Unpaid Principal Balance/ Fair Value Unpaid Principal Balance/ Fair Value Residential mortgage loans held for sale $ 161,717 $ 159,355 $ 182,710 $ 186,175 Residential mortgage loan commitments 160,260 2,869 171,412 6,167 Forward sales contracts 310,237 7,250 328,433 (47) $ 169,474 $ 192,295 No residential mortgage loans held for sale were 90 days or more past due or considered impaired as of March 31, 2022 or December 31, 2021. No credit losses were recognized on residential mortgage loans held for sale for the three month period ended March 31, 2022 and 2021. Mortgage banking revenue was as follows (in thousands): Three Months Ended 2022 2021 Production revenue: Net realized gains on sale of mortgage loans $ 6,883 $ 26,000 Net change in unrealized gain (loss) on mortgage loans held for sale (5,827) (6,955) Net change in the fair value of mortgage loan commitments (3,298) (8,980) Net change in the fair value of forward sales contracts 7,297 15,222 Total production revenue 5,055 25,287 Servicing revenue 11,595 11,826 Total mortgage banking revenue $ 16,650 $ 37,113 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): March 31, 2022 December 31, 2021 Number of residential mortgage loans serviced for others 99,409 102,008 Outstanding principal balance of residential mortgage loans serviced for others $ 16,024,663 $ 16,442,446 Weighted average interest rate 3.57 % 3.58 % Remaining term (in months) 281 281 The following represents activity in capitalized mortgage servicing rights (in thousands): Three Months Ended March 31, 2022 2021 Beginning Balance $ 163,198 $ 101,172 Additions 5,215 9,830 Change in fair value due to principal payments (7,960) (11,961) Change in fair value due to market assumption changes 49,110 33,874 Ending Balance $ 209,563 $ 132,915 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: March 31, 2022 December 31, 2021 Discount rate – risk-free rate plus a market premium 8.53% 8.39% Prepayment rate - based upon loan interest rate, original term and loan type 8.48% 12.11% 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 $1,000 - $4,000 $1,000 - $4,000 Escrow earnings rate – indexed to rates paid on deposit accounts with comparable average life 2.47% 1.32% Primary/secondary mortgage rate spread 105 bps 105 bps Delinquency rate 2.28% 2.05% 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	3 Months Ended
	Mar. 31, 2022
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, 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 requiring 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. The action remains stayed with no current deadlines pending. 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. The Tulsa County District Court action is pending on BOKF, NA’s motion to dismiss the plaintiff's Third Amended Petition. 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 $20 million 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. The United States Courts of Appeals for the Fifth and the Tenth Circuits have each affirmed dismissals of putative class actions in which the plaintiffs alleged that an extended overdraft fee charged by BOKF, NA was impermissible interest. Before the Tenth Circuit affirmed the dismissal of the second putative class action, the plaintiff in the Fifth Circuit case filed an application in the Supreme Court of the United States for an extension of time to file a petition for certiorari, citing the possibility of a split in the Circuit Courts due to the pendency of the Tenth Circuit Appeal. The Supreme Court granted the extension, as it routinely does, and the extension will expire June 12, 2022. Management has been advised by its counsel that, if a petition is filed, the grant of certiorari by the Supreme Court is unlikely. On March 7, 2020, three former employees sued BOKF, NA, the Plan Committee of the BOKF, NA 401k Plan, and Cavanal Hill Investment Management, Inc., a subsidiary of BOKF, NA, alleging that the defendants included proprietary investment products as investment options in the BOKF, NA 401k Plan, whose fees were too high and performance too low, for the purpose of earning fees. The action is brought as a putative class action on behalf of all Plan Participants. The action is pending on the defendants' motion to dismiss. Management is advised by counsel that a loss is not probable and that the loss, if any, cannot be reasonably estimated. In 2019, a limited liability partnership sued BOKF, NA in Colorado District Court alleging that the Bank breached various fiduciary duties as trustee of a trust that was a co-general partner of the partnership and claiming in excess of $60 million in damages. From 2000 to 2009, BOKF was serving as personal representative of the estate of the creator of the trust. In 2009, BOKF moved to close the probate of the estate in the Colorado Probate Court. The members of the partnership who now sue BOKF objected to the closing of the estate and made the same allegations in the 2009 probate hearing as they now make in the 2019 Colorado District Court action. In 2009, the Colorado Probate Court entered summary judgment against the beneficiaries and the estate was closed. The 2019 action is pending on BOKF’s renewed motions for summary judgment. Management is advised by counsel that a loss is not probable and that the loss, if any, cannot be reasonably estimated. 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 sponsors a private equity fund and 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.

Shareholders' Equity

Shareholders' Equity	3 Months Ended
	Mar. 31, 2022
Stockholders' Equity Note [Abstract]
Shareholders' Equity [Text Block]	Shareholders' Equity On May 3, 2022, the Company declared a quarterly cash dividend of $0.53 per common share payable on or about May 25, 2022 to shareholders of record as of May 10, 2022. Dividends declared were $0.53 per share during the three months ended March 31, 2022 and $0.52 per share during the three months ended March 31, 2021. Accumulated Other Comprehensive Income (Loss) AOCI includes unrealized gains and losses on available for sale ("AFS") securities and non-credit related unrealized losses on AFS securities for which an other-than-temporary impairment has been recorded in earnings. Unrealized losses on employee benefit plans will be reclassified into income as pension plan costs are recognized over the remaining service period of plan participants. 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 Employee Benefit Plans Total Balance, Dec. 31, 2020 $ 335,032 $ 836 $ 335,868 Net change in unrealized gain (loss) (150,131) — (150,131) Reclassification adjustments included in earnings: Gain on available for sale securities, net (467) — (467) Other comprehensive income, before income taxes (150,598) — (150,598) Federal and state income taxes (36,139) — (36,139) Other comprehensive income, net of income taxes (114,459) — (114,459) Balance, March 31, 2021 $ 220,573 $ 836 $ 221,409 Balance, Dec. 31, 2021 $ 69,775 $ 2,596 $ 72,371 Net change in unrealized gain (loss) (639,041) — (639,041) Reclassification adjustments included in earnings: Gain on available for sale securities, net (937) — (937) Other comprehensive income, before income taxes (639,978) — (639,978) Federal and state income taxes (149,781) — (149,781) Other comprehensive income (loss), net of income taxes (490,197) — (490,197) Balance, March 31, 2022 $ (420,422) $ 2,596 $ (417,826)

Earnings Per Share

Earnings Per Share	3 Months Ended
	Mar. 31, 2022
Earnings Per Share [Abstract]
Earnings Per Share [Text Block]	Earnings Per Share (In thousands, except share and per share amounts) Three Months Ended March 31, 2022 2021 Numerator: Net income attributable to BOK Financial Corp. shareholders $ 62,488 $ 146,060 Less: Earnings allocated to participating securities 451 937 Numerator for basic earnings per share – income available to common shareholders 62,037 145,123 Effect of reallocating undistributed earnings of participating securities — — Numerator for diluted earnings per share – income available to common shareholders $ 62,037 $ 145,123 Denominator: Weighted average shares outstanding 68,306,107 69,583,788 Less: Participating securities included in weighted average shares outstanding 493,707 446,413 Denominator for basic earnings per common share 67,812,400 69,137,375 Dilutive effect of employee stock compensation plans 1,451 4,335 Denominator for diluted earnings per common share 67,813,851 69,141,710 Basic earnings per share $ 0.91 $ 2.10 Diluted earnings per share $ 0.91 $ 2.10

Reportable Segments

Reportable Segments	3 Months Ended
	Mar. 31, 2022
Segment Reporting [Abstract]
Reportable Segments [Text Block]	Reportable Segments Reportable segments reconciliation to the Consolidated Financial Statements for the three months ended March 31, 2022 is as follows (in thousands): Commercial Consumer Wealth Funds Management and Other BOK Net interest revenue from external sources $ 147,590 $ 16,915 $ 56,231 $ 47,675 $ 268,411 Net interest revenue (expense) from internal sources (10,579) 10,292 (465) 752 — Net interest revenue 137,011 27,207 55,766 48,427 268,411 Net loans charged off and provision for credit losses 5,343 1,112 (71) (6,384) — Net interest revenue after provision for credit losses 131,668 26,095 55,837 54,811 268,411 Other operating revenue 57,427 33,961 25,018 (28,550) 87,856 Other operating expense 65,114 48,789 74,495 89,220 277,618 Net direct contribution 123,981 11,267 6,360 (62,959) 78,649 Gain (loss) on financial instruments, net (204) (57,895) — 58,099 — Change in fair value of mortgage servicing rights — 49,110 — (49,110) — Gain (loss) on repossessed assets, net 1,793 45 — (1,838) — Corporate expense allocations 16,246 12,080 12,062 (40,388) — Net income before taxes 109,324 (9,553) (5,702) (15,420) 78,649 Federal and state income taxes 26,980 (2,236) (1,283) (7,264) 16,197 Net income (loss) 82,344 (7,317) (4,419) (8,156) 62,452 Net income (loss) attributable to non-controlling interests — — — (36) (36) Net income (loss) attributable to BOK Financial Corp. shareholders $ 82,344 $ (7,317) $ (4,419) $ (8,120) $ 62,488 Average assets $ 29,823,905 $ 10,273,890 $ 21,323,795 $ (10,860,516) $ 50,561,074 Reportable segments reconciliation to the Consolidated Financial Statements for the three months ended March 31, 2021 is as follows (in thousands): Commercial Consumer Wealth Funds Management and Other BOK Net interest revenue from external sources $ 155,799 $ 16,686 $ 48,554 $ 59,381 $ 280,420 Net interest revenue (expense) from internal sources (25,794) 4,288 (200) 21,706 — Net interest revenue 130,005 20,974 48,354 81,087 280,420 Net loans charged off and provision for credit losses 13,985 1,136 (29) (40,092) (25,000) Net interest revenue after provision for credit losses 116,020 19,838 48,383 121,179 305,420 Other operating revenue 46,579 52,282 66,123 12,070 177,054 Other operating expense 66,979 55,622 78,565 94,618 295,784 Net direct contribution 95,620 16,498 35,941 38,631 186,690 Gain (loss) on financial instruments, net 33 (29,616) — 29,583 — Change in fair value of mortgage servicing rights — 33,874 — (33,874) — Gain (loss) on repossessed assets, net 12,737 41 — (12,778) — Corporate expense allocations 12,734 11,475 9,887 (34,096) — Net income before taxes 95,656 9,322 26,054 55,658 186,690 Federal and state income taxes 25,983 2,374 6,672 7,353 42,382 Net income 69,673 6,948 19,382 48,305 144,308 Net income (loss) attributable to non-controlling interests — — — (1,752) (1,752) Net income attributable to BOK Financial Corp. shareholders $ 69,673 $ 6,948 $ 19,382 $ 50,057 $ 146,060 Average assets $ 28,047,052 $ 9,755,539 $ 18,645,865 $ (6,137,823) $ 50,310,633

Fees and Commissions Revenue Fe

Fees and Commissions Revenue Fees and Commissions Revenue	3 Months Ended
	Mar. 31, 2022
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 March 31, 2022. Commercial Consumer Wealth Management Funds Management & Other Consolidated Out of Scope 1 In Scope 2 Trading revenue $ — $ — $ (54,048) $ — $ (54,048) $ (54,048) $ — Customer hedging revenue 12,979 — 817 (2,858) 10,938 10,938 — Retail brokerage revenue — — 4,610 — 4,610 — 4,610 Insurance brokerage revenue — — 3,738 — 3,738 — 3,738 Investment banking revenue 3,358 — 4,325 — 7,683 3,099 4,584 Brokerage and trading revenue 16,337 — (40,558) (2,858) (27,079) (40,011) 12,932 TransFund EFT network revenue 18,153 886 (17) 1 19,023 — 19,023 Merchant services revenue 3,641 10 — — 3,651 — 3,651 Corporate card revenue 1,376 — 76 90 1,542 — 1,542 Transaction card revenue 23,170 896 59 91 24,216 — 24,216 Personal trust revenue — — 24,797 — 24,797 — 24,797 Corporate trust revenue — — 3,958 — 3,958 — 3,958 Institutional trust & retirement plan services revenue — — 12,567 — 12,567 — 12,567 Investment management services and other revenue — — 5,121 (44) 5,077 — 5,077 Fiduciary and asset management revenue — — 46,443 (44) 46,399 — 46,399 Commercial account service charge revenue 13,131 450 513 — 14,094 — 14,094 Overdraft fee revenue 31 6,193 23 — 6,247 — 6,247 Check card revenue — 5,545 — — 5,545 — 5,545 Automated service charge and other deposit fee revenue 23 1,107 (14) 2 1,118 — 1,118 Deposit service charges and fees 13,185 13,295 522 2 27,004 — 27,004 Mortgage production revenue — 5,055 — — 5,055 5,055 — Mortgage servicing revenue — 12,076 — (481) 11,595 11,595 — Mortgage banking revenue — 17,131 — (481) 16,650 16,650 — Other revenue 4,272 2,655 18,557 (15,039) 10,445 7,275 3,170 Total fees and commissions revenue $ 56,964 $ 33,977 $ 25,023 $ (18,329) $ 97,635 $ (16,086) $ 113,721 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 March 31, 2021. Commercial Consumer Wealth Management Funds Management & Other Consolidated Out of Scope 1 In Scope 2 Trading revenue $ — $ — $ 3,716 $ — $ 3,716 $ 3,716 $ — Customer hedging revenue 4,207 — 91 (1,706) 2,592 2,592 — Retail brokerage revenue — — 4,741 — 4,741 — 4,741 Insurance brokerage revenue — — 2,916 — 2,916 — 2,916 Investment banking revenue 2,258 — 4,768 (209) 6,817 2,049 4,768 Brokerage and trading revenue 6,465 — 16,232 (1,915) 20,782 8,357 12,425 TransFund EFT network revenue 18,443 834 (13) 2 19,266 — 19,266 Merchant services revenue 2,266 16 — (1) 2,281 — 2,281 Corporate card revenue 804 — 28 51 883 — 883 Transaction card revenue 21,513 850 15 52 22,430 — 22,430 Personal trust revenue — — 21,977 — 21,977 — 21,977 Corporate trust revenue — — 3,789 — 3,789 — 3,789 Institutional trust & retirement plan services revenue — — 12,610 — 12,610 — 12,610 Investment management services and other revenue — — 2,903 43 2,946 — 2,946 Fiduciary and asset management revenue — — 41,279 43 41,322 — 41,322 Commercial account service charge revenue 11,988 434 581 1 13,004 — 13,004 Overdraft fee revenue 26 4,635 19 — 4,680 — 4,680 Check card revenue — 5,327 — — 5,327 — 5,327 Automated service charge and other deposit fee revenue 26 1,150 23 (1) 1,198 — 1,198 Deposit service charges and fees 12,040 11,546 623 — 24,209 — 24,209 Mortgage production revenue — 25,287 — — 25,287 25,287 — Mortgage servicing revenue — 12,277 — (451) 11,826 11,826 — Mortgage banking revenue — 37,564 — (451) 37,113 37,113 — Other revenue 9,829 2,340 7,535 (3,408) 16,296 13,143 3,153 Total fees and commissions revenue $ 49,847 $ 52,300 $ 65,684 $ (5,679) $ 162,152 $ 58,613 $ 103,539 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	3 Months Ended
	Mar. 31, 2022
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 months ended March 31, 2022 and 2021, respectively. Transfers between significant other observable inputs and significant unobservable inputs during the three months ended March 31, 2022 and 2021 are included in the summary of changes in recurring fair values measured using unobservable inputs. 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 March 31, 2022 or December 31, 2021. 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 March 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 $ 13,513 $ 4,978 $ 8,535 $ — Residential agency mortgage-backed securities 4,827,504 — 4,827,504 — Municipal securities 24,539 — 24,539 — Other trading securities 25,540 — 25,540 — Total trading securities 4,891,096 4,978 4,886,118 — Available for sale securities: U.S. Treasury 947 947 — — Municipal securities 526,322 — 526,322 — Residential agency mortgage-backed securities 7,612,021 — 7,612,021 — Residential non-agency mortgage-backed securities 347,187 — 347,187 — Commercial agency mortgage-backed securities 4,407,585 — 4,407,585 — Other debt securities 472 — — 472 Total available for sale securities 12,894,534 947 12,893,115 472 Fair value option securities – Residential agency mortgage-backed securities 185,003 — 185,003 — Residential mortgage loans held for sale 1 169,474 — 160,507 8,967 Mortgage servicing rights 2 209,563 — — 209,563 Derivative contracts, net of cash collateral 2,680,207 — 2,680,207 — Liabilities: Derivative contracts, net of cash collateral 557,834 — 557,834 — 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 95.07% 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. The fair value of financial assets and liabilities measured on a recurring basis was as follows as of December 31, 2021 (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 $ 23,610 $ 4,999 $ 18,611 $ — Residential agency mortgage-backed securities 9,068,900 — 9,068,900 — Municipal securities 25,783 — 25,783 — Other trading securities 18,520 — 18,520 — Total trading securities 9,136,813 4,999 9,131,814 — Available for sale securities: U.S. Treasury 1,000 1,000 — — Municipal securities 508,365 — 508,365 — Residential agency mortgage-backed securities 8,006,616 — 8,006,616 — Residential non-agency mortgage-backed securities 24,339 — 24,339 — Commercial agency mortgage-backed securities 4,617,025 — 4,617,025 — Other debt securities 472 — — 472 Total available for sale securities 13,157,817 1,000 13,156,345 472 Fair value option securities — Residential agency mortgage-backed securities 43,770 — 43,770 — Residential mortgage loans held for sale 1 192,295 — 185,969 6,326 Mortgage servicing rights 2 163,198 — — 163,198 Derivative contracts, net of cash collateral 1,097,297 8,331 1,088,966 — Liabilities: Derivative contracts, net of cash collateral 275,625 — 275,625 — 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 95.07% 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. 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 March 31, 2022 for which the fair value was adjusted during the three months ended March 31, 2022: Fair Value Adjustments for the Carrying Value at March 31, 2022 Three Months Ended Quoted Prices Significant Significant Gross charge-offs against allowance for loan losses Other gains (losses), net Nonaccruing loans $ — $ 4,168 $ 244 $ 818 $ — Real estate and other repossessed assets — 1,412 400 — 106 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 March 31, 2021 for which the fair value was adjusted during the three months ended March 31, 2021: Fair Value Adjustments for the Carrying Value at March 31, 2021 Three Months Ended Quoted Prices Significant Significant Gross charge-offs against allowance for loan losses Other gains (losses), net Nonaccruing loans $ — $ 259 $ 34,046 $ 15,049 $ — Real estate and other repossessed assets — 1,706 300 — (2,200) 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 March 31, 2022 follows (in thousands): Fair Value Valuation Technique(s) Unobservable Input Range Nonaccruing loans $ 244 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 3% - 25% (5%) 1 Real estate and other repossessed assets 400 Discounted cash flows Marketability adjustments off appraised value. 2 75% - 75% (75%) 1 Represents fair value as a percentage of the unpaid principal balance. 2 Marketability adjustments include consideration of estimated costs to sell which is approximately 10% of the fair value. A summary of quantitative information about Non-recurring Fair Value Measurements based on Significant Unobservable Inputs (Level 3) as of March 31, 2021 follows (in thousands): Fair Value Valuation Technique(s) Unobservable Input Range Nonaccruing loans $ 34,046 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 10% - 91% (47%) 1 Real estate and other repossessed assets 300 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 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 non-recurring basis as of March 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 $ 767,805 $ 767,805 $ 767,805 $ — $ — Interest-bearing cash and cash equivalents 599,976 599,976 599,976 — — Trading securities: U.S. government securities 13,513 13,513 4,978 8,535 — Residential agency mortgage-backed securities 4,827,504 4,827,504 — 4,827,504 — Municipal securities 24,539 24,539 — 24,539 — Other trading securities 25,540 25,540 — 25,540 — Total trading securities 4,891,096 4,891,096 4,978 4,886,118 — Investment securities: Municipal securities 177,683 184,214 — 41,920 142,294 Residential agency mortgage-backed securities 6,486 6,741 — 6,741 — Other debt securities 288 280 — 280 — Total investment securities 184,457 191,235 — 48,941 142,294 Allowance for credit losses (633) — — — — Investment securities, net of allowance 183,824 191,235 — 48,941 142,294 Available for sale securities: U.S. Treasury 947 947 947 — — Municipal securities 526,322 526,322 — 526,322 — Residential agency mortgage-backed securities 7,612,021 7,612,021 — 7,612,021 — Residential non-agency mortgage-backed securities 347,187 347,187 — 347,187 — Commercial agency mortgage-backed securities 4,407,585 4,407,585 — 4,407,585 — Other debt securities 472 472 — — 472 Total available for sale securities 12,894,534 12,894,534 947 12,893,115 472 Fair value option securities – Residential agency mortgage-backed securities 185,003 185,003 — 185,003 — Residential mortgage loans held for sale 169,474 169,474 — 160,507 8,967 Loans: Commercial 12,883,189 12,639,182 — — 12,639,182 Commercial real estate 4,100,956 3,985,876 — — 3,985,876 Paycheck protection program 137,365 134,313 — — 134,313 Loans to individuals 3,552,919 3,470,751 — — 3,470,751 Total loans 20,674,429 20,230,122 — — 20,230,122 Allowance for loan losses (246,473) — — — — Loans, net of allowance 20,427,956 20,230,122 — — 20,230,122 Mortgage servicing rights 209,563 209,563 — — 209,563 Derivative instruments with positive fair value, net of cash collateral 2,680,207 2,680,207 — 2,680,207 — Deposits with no stated maturity 37,911,535 37,911,535 — — 37,911,535 Time deposits 1,514,416 1,498,269 — — 1,498,269 Other borrowed funds 1,104,575 1,102,079 — — 1,102,079 Subordinated debentures 131,209 138,623 — 138,623 — Derivative instruments with negative fair value, net of cash collateral 557,834 557,834 — 557,834 — 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 non-recurring basis as of December 31, 2021 (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 $ 712,067 $ 712,067 $ 712,067 $ — $ — Interest-bearing cash and cash equivalents 2,125,343 2,125,343 2,125,343 — — Trading securities: U.S. government securities 23,610 23,610 4,999 18,611 — Residential agency mortgage-backed securities 9,068,900 9,068,900 — 9,068,900 — Municipal securities 25,783 25,783 — 25,783 — Other trading securities 18,520 18,520 — 18,520 — Total trading securities 9,136,813 9,136,813 4,999 9,131,814 — Investment securities: Municipal securities 203,772 223,609 — 57,698 165,911 Residential agency mortgage-backed securities 6,939 7,500 — 7,500 — Other debt securities 288 286 — 286 — Total investment securities 210,999 231,395 — 65,484 165,911 Allowance for credit losses (555) — — — — Investment securities, net of allowance 210,444 231,395 — 65,484 165,911 Available for sale securities: U.S. Treasury 1,000 1,000 1,000 — — Municipal securities 508,365 508,365 — 508,365 — Residential agency mortgage-backed securities 8,006,616 8,006,616 — 8,006,616 — Residential non-agency mortgage-backed securities 24,339 24,339 — 24,339 — Commercial agency mortgage-backed securities 4,617,025 4,617,025 — 4,617,025 — Other debt securities 472 472 — — 472 Total available for sale securities 13,157,817 13,157,817 1,000 13,156,345 472 Fair value option securities — Residential agency mortgage-backed securities 43,770 43,770 — 43,770 — Residential mortgage loans held for sale 192,295 192,295 — 185,969 6,326 Loans: Commercial 12,506,465 12,395,664 — — 12,395,664 Commercial real estate 3,831,325 3,786,767 — — 3,786,767 Paycheck protection program 276,341 269,912 — — 269,912 Loans to individuals 3,591,549 3,586,878 — — 3,586,878 Total loans 20,205,680 20,039,221 — — 20,039,221 Allowance for loan losses (256,421) — — — — Loans, net of allowance 19,949,259 20,039,221 — — 20,039,221 Mortgage servicing rights 163,198 163,198 — — 163,198 Derivative instruments with positive fair value, net of cash collateral 1,097,297 1,097,297 8,331 1,088,966 — Deposits with no stated maturity 39,537,731 39,537,731 — — 39,537,731 Time deposits 1,704,328 1,703,886 — — 1,703,886 Other borrowed funds 2,363,202 2,360,746 — — 2,360,746 Subordinated debentures 131,226 141,761 — 141,761 — Derivative instruments with negative fair value, net of cash collateral 275,625 275,625 — 275,625 — 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	3 Months Ended
	Mar. 31, 2022
Subsequent Events [Abstract]
Subsequent Events [Text Block]	Subsequent Events The Company evaluated events from the date of the consolidated financial statements on March 31, 2022 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.

Significant Accounting Polici_2

Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2022
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. 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting ("ASU 2020-04") On March 12, 2020, the FASB issued ASU 2020-04 which provides optional expedients and exceptions for applying U.S. GAAP to contract modifications and hedging relationships that reference LIBOR or another reference rate expected to be discontinued, subject to meeting certain criteria. Under the new guidance, an entity can elect by accounting topic or industry subtopic to account for the modification of a contract affected by reference rate reform as a continuation of the existing contract, if certain conditions are met. In addition, the new guidance allows an entity to elect on a hedge-by-hedge basis to continue to apply hedge accounting for hedging relationships in which the critical terms change due to reference rate reform, if certain conditions are met. A one-time election to sell and/or transfer held-to-maturity debt securities that reference a rate affected by reference rate reform is also allowed. ASU 2020-04 became effective for all entities as of March 12, 2020 and will apply to all LIBOR reference rate modifications through December 31, 2022. Adoption of ASU 2020-04 did not have a material impact on the Company's financial statements. FASB Accounting Standards Update No. 2021-01, Reference Rate Reform (Topic 848): Scope ("ASU 2021-01") On January 7, 2021, the FASB issued ASU 2021-01 which clarifies that certain optional expedients and exceptions in Topic 848 for contract modifications and hedge accounting apply to derivatives that are affected by the discounting transition. The amendments in this update are elective and apply to all entities that have derivative instruments that use an interest rate for margining, discounting, or contract price alignment that is modified as a result of reference rate reform. The amendments also optionally apply to all entities that designate receive-variable rate, pay-variable-rate cross-currency interest rate swaps as hedging instruments in net investment hedges that are modified as a result of reference rate reform. ASU 2021-01 is effective immediately for all entities and amendments may be applied on a full retrospective basis as of any date from the beginning of an interim period that includes or is subsequent to March 12, 2020. Adoption of ASU 2021-01 did not have a material impact on the Company's financial statements. 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 is effective for fiscal years beginning after December 15, 2022 and amendments related to TDR recognition and measurement may be applied using either a prospective or modified retrospective transition method, while amendments on TDR and vintage disclosures are to be adopted prospectively. Management is currently evaluating the impact of ASU 2022-02 on the Company's financial statements.
Derivatives, Policy [Policy Text Block]	Derivative instruments may be used by the Company as part of its internal risk management programs or may be offered to customers. All derivative instruments are carried at fair value and changes in fair value are reported in earnings as they occur. Credit risk is also considered in determining fair value. Deterioration in the credit rating of customer or other counterparties reduced 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. Loans to borrowers experiencing financial difficulties may be modified in troubled debt restructurings ("TDRs"). Primarily all TDRs are classified as nonaccruing, excluding loans guaranteed by U.S. government agencies. Modifications generally consist of extension of payment terms or interest rate concessions and may result 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. 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 TDR. The charge-off amount is determined through a quarterly evaluation of available cash resources and collateral value. 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.
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, 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 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)	3 Months Ended
	Mar. 31, 2022
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 reduced 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)	3 Months Ended
	Mar. 31, 2022
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): March 31, 2022 December 31, 2021 Fair Value Net Unrealized Gain (Loss) Fair Value Net Unrealized Gain (Loss) U.S. government securities $ 13,513 $ (10) $ 23,610 $ 40 Residential agency mortgage-backed securities 4,827,504 (135,438) 9,068,900 (9,338) Municipal securities 24,539 (478) 25,783 34 Other trading securities 25,540 (148) 18,520 (26) Total trading securities $ 4,891,096 $ (136,074) $ 9,136,813 $ (9,290)
Investment Securities (Held-to-Maturity) [Table Text Block]	The amortized cost and fair values of investment securities are as follows (in thousands): March 31, 2022 Amortized Fair Gross Unrealized Cost Value Gain Loss Municipal securities $ 177,683 $ 184,214 $ 7,155 $ (624) Residential agency mortgage-backed securities 6,486 6,741 283 (28) Other debt securities 288 280 — (8) Total investment securities 184,457 191,235 7,438 (660) Allowance for credit losses (633) Investment securities, net of allowance $ 183,824 $ 191,235 $ 7,438 $ (660) December 31, 2021 Amortized Fair Gross Unrealized Cost Value Gain Loss Municipal securities $ 203,772 $ 223,609 $ 19,851 $ (14) Residential agency mortgage-backed securities 6,939 7,500 561 — Other debt securities 288 286 — (2) Total investment securities 210,999 231,395 20,412 (16) Allowance for credit losses (555) Investment securities, net of allowance $ 210,444 $ 231,395 $ 20,412 $ (16) The amortized cost and fair values of investment securities at March 31, 2022, 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 $ 14,901 $ 104,681 $ 52,359 $ 6,030 $ 177,971 4.55 Fair value 15,080 110,636 52,834 5,944 184,494 Residential mortgage-backed securities: Amortized cost $ 6,486 2 Fair value 6,741 Total investment securities: Amortized cost $ 184,457 Fair value 191,235 1 Expected maturities may differ from contractual maturities, because borrowers may have the right to call or prepay obligations with or without penalty. 2 The average expected lives of residential mortgage-backed securities were 4.4 years based upon current prepayment assumptions. Temporarily Impaired Investment Securities (in thousands): March 31, 2022 Number of Securities Less Than 12 Months 12 Months or Longer Total Fair Unrealized Fair Unrealized Fair Unrealized Investment: Municipal securities 35 $ 22,394 $ 566 $ 544 $ 58 $ 22,938 $ 624 Residential agency mortgage-backed securities 1 1,534 28 — — 1,534 28 Other debt securities 2 243 7 24 1 267 8 Total investment securities 38 $ 24,171 $ 601 $ 568 $ 59 $ 24,739 $ 660 December 31, 2021 Number of Securities Less Than 12 Months 12 Months or Longer Total Fair Unrealized Fair Unrealized Fair Unrealized Investment: Municipal securities 1 $ — $ — $ 587 $ 14 $ 587 $ 14 Other debt securities 2 273 2 — — 273 2 Total investment securities 3 $ 273 $ 2 $ 587 $ 14 $ 860 $ 16
Available For Sale Securities [Table Text Block]	The amortized cost and fair value of available for sale securities are as follows (in thousands): March 31, 2022 Amortized Fair Gross Unrealized Cost Value Gain Loss U.S. Treasury $ 1,000 $ 947 $ — $ (53) Municipal securities 562,065 526,322 144 (35,887) Mortgage-backed securities: Residential agency 7,913,760 7,612,021 14,727 (316,466) Residential non-agency 339,904 347,187 13,279 (5,996) Commercial agency 4,623,902 4,407,585 2,809 (219,126) Other debt securities 500 472 — (28) Total available for sale securities $ 13,441,131 $ 12,894,534 $ 30,959 $ (577,556) December 31, 2021 Amortized Fair Gross Unrealized Cost Value Gain Loss U.S. Treasury $ 1,001 $ 1,000 $ — $ (1) Municipal securities 515,551 508,365 1,302 (8,488) Mortgage-backed securities: Residential agency 7,908,587 8,006,616 155,477 (57,448) Residential non-agency 10,625 24,339 13,714 — Commercial agency 4,628,172 4,617,025 36,868 (48,015) Other debt securities 500 472 — (28) Total available for sale securities $ 13,064,436 $ 13,157,817 $ 207,361 $ (113,980) The amortized cost and fair values of available for sale securities at March 31, 2022, 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 $ 48,510 $ 1,968,389 $ 2,683,456 $ 487,112 $ 5,187,467 6.59 Fair value 48,612 1,911,239 2,507,611 467,864 4,935,326 Residential mortgage-backed securities: Amortized cost $ 8,253,664 2 Fair value 7,959,208 Total available for sale securities: Amortized cost $ 13,441,131 Fair value 12,894,534 1 Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without penalty. 2 The average expected lives of residential mortgage-backed securities were 4.3 years based upon current prepayment assumptions. Sales of available for sale securities resulted in gains and losses as follows (in thousands): Three Months Ended 2022 2021 Proceeds $ 55,185 $ 56,037 Gross realized gains 1,933 473 Gross realized losses (996) (6) Related federal and state income tax expense 219 119
Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value [Table Text Block]	March 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 $ 947 $ 53 $ — $ — $ 947 $ 53 Municipal securities 202 $ 400,690 $ 26,297 $ 111,502 $ 9,590 $ 512,192 $ 35,887 Mortgage-backed securities: Residential agency 508 5,127,508 191,126 1,412,323 125,340 6,539,831 316,466 Residential non-agency 15 304,149 5,996 — — 304,149 5,996 Commercial agency 238 2,988,497 177,409 773,363 41,717 3,761,860 219,126 Other debt securities 1 — — 472 28 472 28 Total available for sale securities 965 $ 8,821,791 $ 400,881 $ 2,297,660 $ 176,675 $ 11,119,451 $ 577,556 December 31, 2021 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 $ 1,000 $ 1 $ — $ — $ 1,000 $ 1 Municipal securities 175 $ 423,575 $ 7,762 $ 22,476 $ 726 $ 446,051 $ 8,488 Mortgage-backed securities: Residential agency 120 2,382,094 37,121 750,044 20,327 3,132,138 57,448 Commercial agency 165 2,104,689 35,488 703,216 12,527 2,807,905 48,015 Other debt securities 1 — — 472 28 472 28 Total available for sale securities 462 $ 4,911,358 $ 80,372 $ 1,476,208 $ 33,608 $ 6,387,566 $ 113,980
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): March 31, 2022 December 31, 2021 Fair Value Net Unrealized Gain (Loss) Fair Value Net Unrealized Gain (Loss) Residential agency mortgage-backed securities $ 185,003 $ (4,017) $ 43,770 $ 1,591

Derivatives (Tables)

Derivatives (Tables)	3 Months Ended
	Mar. 31, 2022
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 March 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 $ 2,901,463 $ 69,287 $ (6,285) $ 63,002 $ (24,595) $ 38,407 Energy contracts 8,010,126 2,683,519 (541,826) 2,141,693 (12,281) 2,129,412 Agricultural contracts — — — — — — Foreign exchange contracts 180,648 179,024 — 179,024 (715) 178,309 Equity option contracts 39,984 896 — 896 (300) 596 Total customer risk management programs 11,132,221 2,932,726 (548,111) 2,384,615 (37,891) 2,346,724 Trading 29,002,117 550,075 (218,429) 331,646 (96) 331,550 Internal risk management programs 200,000 1,933 — 1,933 — 1,933 Total derivative contracts $ 40,334,338 $ 3,484,734 $ (766,540) $ 2,718,194 $ (37,987) $ 2,680,207 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 $ 2,901,463 $ 69,334 $ (6,285) $ 63,049 $ (61) $ 62,988 Energy contracts 8,069,893 2,712,617 (541,826) 2,170,791 (2,159,402) 11,389 Agricultural contracts — — — — — — Foreign exchange contracts 179,447 177,609 — 177,609 — 177,609 Equity option contracts 39,984 896 — 896 — 896 Total customer risk management programs 11,190,787 2,960,456 (548,111) 2,412,345 (2,159,463) 252,882 Trading 26,298,226 525,699 (218,429) 307,270 (15,474) 291,796 Internal risk management programs 394,216 13,156 — 13,156 — 13,156 Total derivative contracts $ 37,883,229 $ 3,499,311 $ (766,540) $ 2,732,771 $ (2,174,937) $ 557,834 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, 2021 (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 $ 2,614,162 $ 53,881 $ (10,101) $ 43,780 $ — $ 43,780 Energy contracts 6,360,095 1,168,363 (375,624) 792,739 — 792,739 Agricultural contracts — — — — — — Foreign exchange contracts 216,272 215,148 — 215,148 — 215,148 Equity option contracts 42,136 755 — 755 (242) 513 Total customer risk management programs 9,232,665 1,438,147 (385,725) 1,052,422 (242) 1,052,180 Trading 35,592,751 139,694 (104,326) 35,368 (721) 34,647 Internal risk management programs 869,506 10,687 (217) 10,470 — 10,470 Total derivative contracts $ 45,694,922 $ 1,588,528 $ (490,268) $ 1,098,260 $ (963) $ 1,097,297 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 $ 2,614,162 $ 54,062 $ (10,101) $ 43,961 $ (33,870) $ 10,091 Energy contracts 6,480,840 1,210,946 (375,624) 835,322 (803,102) 32,220 Agricultural contracts — — — — — — Foreign exchange contracts 208,381 207,119 — 207,119 (447) 206,672 Equity option contracts 42,136 755 — 755 — 755 Total customer risk management programs 9,345,519 1,472,882 (385,725) 1,087,157 (837,419) 249,738 Trading 41,285,649 152,947 (104,326) 48,621 (24,074) 24,547 Internal risk management programs 298,832 1,557 (217) 1,340 — 1,340 Total derivative contracts $ 50,930,000 $ 1,627,386 $ (490,268) $ 1,137,118 $ (861,493) $ 275,625 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 March 31, 2022 March 31, 2021 Brokerage Gain (Loss) on Derivatives, Net Brokerage Gain (Loss) on Derivatives, Net Customer risk management programs: Interest rate contracts $ 6,342 $ — $ 1,388 $ — Energy contracts 4,449 — 1,020 — Agricultural contracts — — 18 — Foreign exchange contracts 148 — 166 — Equity option contracts — — — — Total customer risk management programs 10,939 — 2,592 — Trading 1 31,074 — (71,259) — Internal risk management programs — (46,981) — (27,650) Total derivative contracts $ 42,013 $ (46,981) $ (68,667) $ (27,650) 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)	3 Months Ended
	Mar. 31, 2022
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): March 31, 2022 December 31, 2021 Fixed Variable Non-accrual Total Fixed Variable Non-accrual Total Commercial $ 3,343,185 $ 9,479,667 $ 60,337 $ 12,883,189 $ 3,360,117 $ 9,072,244 $ 74,104 $ 12,506,465 Commercial real estate 924,332 3,160,635 15,989 4,100,956 929,015 2,888,048 14,262 3,831,325 Paycheck protection program 137,365 — — 137,365 276,341 — — 276,341 Loans to individuals 2,006,029 1,498,970 47,920 3,552,919 2,037,792 1,508,064 45,693 3,591,549 Total $ 6,410,911 $ 14,139,272 $ 124,246 $ 20,674,429 $ 6,603,265 $ 13,468,356 $ 134,059 $ 20,205,680
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 March 31, 2022 Commercial Commercial Real Estate Paycheck Protection Program Loans to Individuals Total Allowance for loan losses: Beginning balance $ 162,056 $ 58,553 $ — $ 35,812 $ 256,421 Provision for loan losses (5,118) 468 — 683 (3,967) Loans charged off (6,081) (191) — (1,533) (7,805) Recoveries of loans previously charged off 591 144 — 1,089 1,824 Ending Balance $ 151,448 $ 58,974 $ — $ 36,051 $ 246,473 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 154 3,023 — 91 3,268 Ending Balance $ 13,966 $ 20,465 $ — $ 1,814 $ 36,245 Three Months Ended March 31, 2021 Commercial Commercial Real Estate Paycheck Protection Program Loans to Individuals Total Allowance for loan losses: Beginning balance $ 254,934 $ 86,558 $ — $ 47,148 $ 388,640 Provision for loan losses (9,893) (4,579) — (7,298) (21,770) Loans charged off (15,345) (263) — (1,297) (16,905) Recoveries of loans previously charged off 1,676 30 — 731 2,437 Ending Balance $ 231,372 $ 81,746 $ — $ 39,284 $ 352,402 Allowance for off-balance sheet credit risk from unfunded loan commitments: Beginning balance $ 14,422 $ 20,571 $ — $ 1,928 $ 36,921 Provision for off-balance sheet credit risk (1,686) (2,273) — (85) (4,044) Ending Balance $ 12,736 $ 18,298 $ — $ 1,843 $ 32,877 Changes in our reasonable and supportable forecasts of macroeconomic variables resulted in a $7.3 million negative provision for credit losses related to lending activities during the first quarter of 2022. Continued strength in commodity prices was partially offset by changes in our economic outlook. Changes in the loan portfolio characteristics, including specific impairment and losses, loan balances, risk grading and changes in payment profile resulted in a $6.6 million provision for credit losses related to lending activities. The allowance for loan losses and recorded investment of the related loans by portfolio segment for each measurement method at March 31, 2022 is as follows (in thousands): Collectively Measured Individually Measured Total Recorded Investment Related Allowance Recorded Investment Related Allowance Recorded Investment Related Commercial $ 12,822,852 $ 149,095 $ 60,337 $ 2,353 $ 12,883,189 $ 151,448 Commercial real estate 4,084,967 58,039 15,989 935 4,100,956 58,974 Paycheck protection program 137,365 — — — 137,365 — Loans to individuals 3,504,999 36,051 47,920 — 3,552,919 36,051 Total $ 20,550,183 $ 243,185 $ 124,246 $ 3,288 $ 20,674,429 $ 246,473 The allowance for loan losses and recorded investment of the related loans by portfolio segment for each measurement method at December 31, 2021 is as follows (in thousands): Collectively Measured Individually Measured Total Recorded Investment Related Allowance Recorded Investment Related Allowance Recorded Investment Related Commercial $ 12,432,361 $ 158,063 $ 74,104 $ 3,993 $ 12,506,465 $ 162,056 Commercial real estate 3,817,063 56,204 14,262 2,349 3,831,325 58,553 Paycheck protection program 276,341 — — — 276,341 — Loans to individuals 3,545,856 35,812 45,693 — 3,591,549 35,812 Total $ 20,071,621 $ 250,079 $ 134,059 $ 6,342 $ 20,205,680 $ 256,421
Schedule of Credit Quality Indicators [Table Text Block]	The following table summarizes the Company’s loan portfolio at March 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 $ 102,694 $ 156,167 $ 48,775 $ 15,678 $ 11,925 $ 8,450 $ 2,753,419 $ — $ 3,097,108 Special Mention — 551 642 — — — 1,090 — 2,283 Accruing Substandard — — — 1,139 693 705 60,863 9,900 73,300 Nonaccrual — — 19,404 — — 602 4,970 — 24,976 Total energy 102,694 156,718 68,821 16,817 12,618 9,757 2,820,342 9,900 3,197,667 Healthcare Pass 140,071 574,892 549,379 514,779 483,909 933,344 168,255 24 3,364,653 Special Mention — 6,787 — 15,417 — 5,712 5 — 27,921 Accruing Substandard — — — 26,973 — 7,109 — — 34,082 Nonaccrual — — — — 6,542 8,534 — — 15,076 Total healthcare 140,071 581,679 549,379 557,169 490,451 954,699 168,260 24 3,441,732 Services Pass 54,992 634,506 361,724 266,054 246,336 933,399 779,824 567 3,277,402 Special Mention — 415 6,326 1,989 1,006 95 22,419 182 32,432 Accruing Substandard — 10 499 4,002 10,579 2,990 7,046 — 25,126 Nonaccrual — — — — — 16,145 390 — 16,535 Total services 54,992 634,931 368,549 272,045 257,921 952,629 809,679 749 3,351,495 General business Pass 209,407 547,777 220,861 250,546 167,570 356,548 1,102,054 1,981 2,856,744 Special Mention — — 137 — 1,374 2,975 8,100 — 12,586 Accruing Substandard — 215 957 1,139 5,673 9,231 2,000 — 19,215 Nonaccrual — — 1,111 799 1,004 24 800 12 3,750 Total general business 209,407 547,992 223,066 252,484 175,621 368,778 1,112,954 1,993 2,892,295 Total commercial 507,164 1,921,320 1,209,815 1,098,515 936,611 2,285,863 4,911,235 12,666 12,883,189 Commercial real estate: Pass 279,254 921,473 695,399 826,150 398,633 820,481 107,780 25 4,049,195 Special Mention — — — — — 18,942 — — 18,942 Accruing Substandard — — — — 13,501 3,329 — — 16,830 Nonaccrual — — — 7,908 — 8,081 — — 15,989 Total commercial real estate 279,254 921,473 695,399 834,058 412,134 850,833 107,780 25 4,100,956 Origination Year 2022 2021 2020 2019 2018 Prior Revolving Loans Revolving Loans Converted to Term Loans Total Paycheck protection program: Pass — 113,697 23,668 — — — — — 137,365 Total paycheck protection program — 113,697 23,668 — — — — — 137,365 Loans to individuals: Residential mortgage Pass 77,813 393,077 427,965 70,900 48,809 330,626 320,350 21,887 1,691,427 Special Mention — 35 — 17 145 284 552 210 1,243 Accruing Substandard — — — — — 53 26 — 79 Nonaccrual 35 1,517 2,571 356 2,057 21,653 1,903 665 30,757 Total residential mortgage 77,848 394,629 430,536 71,273 51,011 352,616 322,831 22,762 1,723,506 Residential mortgage guaranteed by U.S. government agencies Pass — 1,080 11,379 15,778 23,480 253,872 — — 305,589 Nonaccrual — — — 2,081 1,746 13,165 — — 16,992 Total residential mortgage guaranteed by U.S. government agencies — 1,080 11,379 17,859 25,226 267,037 — — 322,581 Personal: Pass 40,789 219,748 171,964 174,523 70,349 214,736 613,114 598 1,505,821 Special Mention — 49 23 — 15 42 15 — 144 Accruing Substandard — 524 — 165 — — 7 — 696 Nonaccrual — 14 19 10 22 42 64 — 171 Total personal 40,789 220,335 172,006 174,698 70,386 214,820 613,200 598 1,506,832 Total loans to individuals 118,637 616,044 613,921 263,830 146,623 834,473 936,031 23,360 3,552,919 Total loans $ 905,055 $ 3,572,534 $ 2,542,803 $ 2,196,403 $ 1,495,368 $ 3,971,169 $ 5,955,046 $ 36,051 $ 20,674,429 The following table summarizes the Company’s loan portfolio at December 31, 2021 by the risk grade categories and vintage (in thousands): Origination Year 2021 2020 2019 2018 2017 Prior Revolving Loans Revolving Loans Converted to Term Loans Total Commercial: Energy Pass $ 252,133 $ 29,556 $ 15,914 $ 13,548 $ 4,741 $ 6,765 $ 2,540,525 $ — $ 2,863,182 Special Mention 558 771 — — — — 750 — 2,079 Accruing Substandard 10,650 22,611 1,185 814 — 716 74,556 — 110,532 Nonaccrual — 20,487 — — — 714 9,890 — 31,091 Total energy 263,341 73,425 17,099 14,362 4,741 8,195 2,625,721 — 3,006,884 Healthcare Pass 563,800 589,193 516,558 498,998 319,096 688,136 160,154 26 3,335,961 Special Mention 6,835 — 15,583 — 11,135 — 5 — 33,558 Accruing Substandard — — 27,135 543 — 1,981 — — 29,659 Nonaccrual — — — 6,542 — 8,711 509 — 15,762 Total healthcare 570,635 589,193 559,276 506,083 330,231 698,828 160,668 26 3,414,940 Services Pass 696,149 405,057 289,375 275,010 225,404 795,029 607,958 375 3,294,357 Special Mention 434 405 1,830 1,047 3,290 47 17,210 192 24,455 Accruing Substandard 43 530 4,166 10,714 1,785 2,366 11,607 — 31,211 Nonaccrual — — — 230 13,918 2,519 503 — 17,170 Total services 696,626 405,992 295,371 287,001 244,397 799,961 637,278 567 3,367,193 General business Pass 584,438 211,892 264,462 177,384 168,977 215,014 1,047,420 2,284 2,671,871 Special Mention 218 223 60 1,435 3,842 — 5,875 — 11,653 Accruing Substandard 265 1,066 1,634 7,697 8,336 3,024 1,821 — 23,843 Nonaccrual — 2,444 4,562 1,046 762 518 730 19 10,081 Total general business 584,921 215,625 270,718 187,562 181,917 218,556 1,055,846 2,303 2,717,448 Total commercial 2,115,523 1,284,235 1,142,464 995,008 761,286 1,725,540 4,479,513 2,896 12,506,465 Commercial real estate: Pass 717,400 711,231 871,283 403,115 279,058 664,684 117,847 31 3,764,649 Special Mention — — — 6,660 10,898 9,244 — — 26,802 Accruing Substandard — — — 13,352 4,480 7,780 — — 25,612 Nonaccrual — — 8,076 — — 6,186 — — 14,262 Total commercial real estate 717,400 711,231 879,359 423,127 294,436 687,894 117,847 31 3,831,325 Origination Year 2021 2020 2019 2018 2017 Prior Revolving Loans Revolving Loans Converted to Term Loans Total Paycheck protection program: Pass 237,357 38,984 — — — — — — 276,341 Total paycheck protection program 237,357 38,984 — — — — — — 276,341 Loans to individuals: Residential mortgage Pass 386,092 452,537 84,001 60,390 68,150 295,632 320,638 21,463 1,688,903 Special Mention — — 156 — 19 411 282 159 1,027 Accruing Substandard 98 — — — 127 41 400 — 666 Nonaccrual 1,516 1,809 383 1,968 629 22,289 2,177 803 31,574 Total residential mortgage 387,706 454,346 84,540 62,358 68,925 318,373 323,497 22,425 1,722,170 Residential mortgage guaranteed by U.S. government agencies Pass 699 11,380 20,650 27,970 32,742 246,871 — — 340,312 Nonaccrual — — 1,259 821 635 11,146 — — 13,861 Total residential mortgage guaranteed by U.S. government agencies 699 11,380 21,909 28,791 33,377 258,017 — — 354,173 Personal: Pass 218,960 180,577 177,389 70,249 92,592 135,041 638,713 728 1,514,249 Special Mention — 9 34 3 — 47 — — 93 Accruing Substandard 435 5 165 — — 1 — — 606 Nonaccrual 110 14 10 24 35 40 25 — 258 Total personal 219,505 180,605 177,598 70,276 92,627 135,129 638,738 728 1,515,206 Total loans to individuals 607,910 646,331 284,047 161,425 194,929 711,519 962,235 23,153 3,591,549 Total loans $ 3,678,190 $ 2,680,781 $ 2,305,870 $ 1,579,560 $ 1,250,651 $ 3,124,953 $ 5,559,595 $ 26,080 $ 20,205,680
Financing Receivable, Nonaccrual [Table Text Block]	A summary of nonaccruing loans at March 31, 2022 follows (in thousands): As of March 31, 2022 Total With No With Allowance Related Allowance Commercial: Energy $ 24,976 $ 24,976 $ — $ — Healthcare 15,076 8,534 6,542 946 Services 16,535 13,290 3,245 1,407 General business 3,750 3,750 — — Total commercial 60,337 50,550 9,787 2,353 Commercial real estate 15,989 8,081 7,908 935 Loans to individuals: Residential mortgage 30,757 30,757 — — Residential mortgage guaranteed by U.S. government agencies 16,992 16,992 — — Personal 171 171 — — Total loans to individuals 47,920 47,920 — — Total $ 124,246 $ 106,551 $ 17,695 $ 3,288 A summary of nonaccruing loans at December 31, 2021 follows (in thousands): As of December 31, 2021 Total With No With Allowance Related Allowance Commercial: Energy $ 31,091 $ 31,091 $ — $ — Healthcare 15,762 9,679 6,083 53 Services 17,170 13,686 3,484 2,584 General business 10,081 7,690 2,391 1,357 Total commercial 74,104 62,146 11,958 3,994 Commercial real estate 14,262 6,186 8,076 2,349 Loans to individuals: Residential mortgage 31,574 31,574 — — Residential mortgage guaranteed by U.S. government agencies 13,861 13,861 — — Personal 258 258 — — Total loans to individuals 45,693 45,693 — — Total $ 134,059 $ 114,025 $ 20,034 $ 6,343
Summary of Loans by Aging Status [Table Text Block]	A summary of loans currently performing and past due as of March 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 $ 3,197,667 $ — $ — $ — $ 3,197,667 $ — Healthcare 3,433,749 1,300 141 6,542 3,441,732 — Services 3,340,989 743 1,377 8,386 3,351,495 — General business 2,891,472 691 — 132 2,892,295 — Total commercial 12,863,877 2,734 1,518 15,060 12,883,189 — Commercial real estate 4,089,135 4,473 4,270 3,078 4,100,956 — Paycheck protection program 137,052 — 6 307 137,365 307 Loans to individuals: Residential mortgage 1,707,772 9,334 364 6,036 1,723,506 — Residential mortgage guaranteed by U.S. government agencies 147,883 51,165 — 123,533 322,581 109,283 Personal 1,506,538 114 107 73 1,506,832 — Total loans to individuals 3,362,193 60,613 471 129,642 3,552,919 109,283 Total $ 20,452,257 $ 67,820 $ 6,265 $ 148,087 $ 20,674,429 $ 109,590 A summary of loans currently performing and past due as of December 31, 2021 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 $ 3,002,623 $ 545 $ 3,716 $ — $ 3,006,884 $ — Healthcare 3,412,072 2,359 — 509 3,414,940 — Services 3,352,639 920 4,620 9,014 3,367,193 — General business 2,705,596 6,080 997 4,775 2,717,448 199 Total commercial 12,472,930 9,904 9,333 14,298 12,506,465 199 Commercial real estate 3,827,962 — 206 3,157 3,831,325 — Paycheck protection program 276,341 — — — 276,341 74 Loans to individuals: Residential mortgage 1,707,654 6,263 1,556 6,697 1,722,170 — Residential mortgage guaranteed by U.S. government agencies 181,022 26,869 16,751 129,531 354,173 118,819 Personal 1,514,938 66 24 178 1,515,206 40 Total loans to individuals 3,403,614 33,198 18,331 136,406 3,591,549 118,859 Total $ 19,980,847 $ 43,102 $ 27,870 $ 153,861 $ 20,205,680 $ 119,132

Mortgage Banking Activities (Ta

Mortgage Banking Activities (Tables)	3 Months Ended
	Mar. 31, 2022
Mortgage Banking [Abstract]
Components of Residential Mortgage Loans Held For Sale [Table Text Block]	March 31, 2022 December 31, 2021 Unpaid Principal Balance/ Fair Value Unpaid Principal Balance/ Fair Value Residential mortgage loans held for sale $ 161,717 $ 159,355 $ 182,710 $ 186,175 Residential mortgage loan commitments 160,260 2,869 171,412 6,167 Forward sales contracts 310,237 7,250 328,433 (47) $ 169,474 $ 192,295
Mortgage Banking Revenue [Table Text Block]	Mortgage banking revenue was as follows (in thousands): Three Months Ended 2022 2021 Production revenue: Net realized gains on sale of mortgage loans $ 6,883 $ 26,000 Net change in unrealized gain (loss) on mortgage loans held for sale (5,827) (6,955) Net change in the fair value of mortgage loan commitments (3,298) (8,980) Net change in the fair value of forward sales contracts 7,297 15,222 Total production revenue 5,055 25,287 Servicing revenue 11,595 11,826 Total mortgage banking revenue $ 16,650 $ 37,113
Summary of Mortgage Servicing Rights [Table Text Block]	The following represents a summary of mortgage servicing rights (dollars in thousands): March 31, 2022 December 31, 2021 Number of residential mortgage loans serviced for others 99,409 102,008 Outstanding principal balance of residential mortgage loans serviced for others $ 16,024,663 $ 16,442,446 Weighted average interest rate 3.57 % 3.58 % Remaining term (in months) 281 281 The following represents activity in capitalized mortgage servicing rights (in thousands):
Activity in Capitalized Mortgage Servicing Rights [Table Text Block]	Three Months Ended March 31, 2022 2021 Beginning Balance $ 163,198 $ 101,172 Additions 5,215 9,830 Change in fair value due to principal payments (7,960) (11,961) Change in fair value due to market assumption changes 49,110 33,874 Ending Balance $ 209,563 $ 132,915
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: March 31, 2022 December 31, 2021 Discount rate – risk-free rate plus a market premium 8.53% 8.39% Prepayment rate - based upon loan interest rate, original term and loan type 8.48% 12.11% 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 $1,000 - $4,000 $1,000 - $4,000 Escrow earnings rate – indexed to rates paid on deposit accounts with comparable average life 2.47% 1.32% Primary/secondary mortgage rate spread 105 bps 105 bps Delinquency rate 2.28% 2.05%

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	3 Months Ended
	Mar. 31, 2022
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 Employee Benefit Plans Total Balance, Dec. 31, 2020 $ 335,032 $ 836 $ 335,868 Net change in unrealized gain (loss) (150,131) — (150,131) Reclassification adjustments included in earnings: Gain on available for sale securities, net (467) — (467) Other comprehensive income, before income taxes (150,598) — (150,598) Federal and state income taxes (36,139) — (36,139) Other comprehensive income, net of income taxes (114,459) — (114,459) Balance, March 31, 2021 $ 220,573 $ 836 $ 221,409 Balance, Dec. 31, 2021 $ 69,775 $ 2,596 $ 72,371 Net change in unrealized gain (loss) (639,041) — (639,041) Reclassification adjustments included in earnings: Gain on available for sale securities, net (937) — (937) Other comprehensive income, before income taxes (639,978) — (639,978) Federal and state income taxes (149,781) — (149,781) Other comprehensive income (loss), net of income taxes (490,197) — (490,197) Balance, March 31, 2022 $ (420,422) $ 2,596 $ (417,826)

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2022
Earnings Per Share [Abstract]
Earnings Per Share [Table Text Block]	(In thousands, except share and per share amounts) Three Months Ended March 31, 2022 2021 Numerator: Net income attributable to BOK Financial Corp. shareholders $ 62,488 $ 146,060 Less: Earnings allocated to participating securities 451 937 Numerator for basic earnings per share – income available to common shareholders 62,037 145,123 Effect of reallocating undistributed earnings of participating securities — — Numerator for diluted earnings per share – income available to common shareholders $ 62,037 $ 145,123 Denominator: Weighted average shares outstanding 68,306,107 69,583,788 Less: Participating securities included in weighted average shares outstanding 493,707 446,413 Denominator for basic earnings per common share 67,812,400 69,137,375 Dilutive effect of employee stock compensation plans 1,451 4,335 Denominator for diluted earnings per common share 67,813,851 69,141,710 Basic earnings per share $ 0.91 $ 2.10 Diluted earnings per share $ 0.91 $ 2.10

Reportable Segments (Tables)

Reportable Segments (Tables)	3 Months Ended
	Mar. 31, 2022
Segment Reporting [Abstract]
Reportable Segments [Table Text Block]	Reportable segments reconciliation to the Consolidated Financial Statements for the three months ended March 31, 2022 is as follows (in thousands): Commercial Consumer Wealth Funds Management and Other BOK Net interest revenue from external sources $ 147,590 $ 16,915 $ 56,231 $ 47,675 $ 268,411 Net interest revenue (expense) from internal sources (10,579) 10,292 (465) 752 — Net interest revenue 137,011 27,207 55,766 48,427 268,411 Net loans charged off and provision for credit losses 5,343 1,112 (71) (6,384) — Net interest revenue after provision for credit losses 131,668 26,095 55,837 54,811 268,411 Other operating revenue 57,427 33,961 25,018 (28,550) 87,856 Other operating expense 65,114 48,789 74,495 89,220 277,618 Net direct contribution 123,981 11,267 6,360 (62,959) 78,649 Gain (loss) on financial instruments, net (204) (57,895) — 58,099 — Change in fair value of mortgage servicing rights — 49,110 — (49,110) — Gain (loss) on repossessed assets, net 1,793 45 — (1,838) — Corporate expense allocations 16,246 12,080 12,062 (40,388) — Net income before taxes 109,324 (9,553) (5,702) (15,420) 78,649 Federal and state income taxes 26,980 (2,236) (1,283) (7,264) 16,197 Net income (loss) 82,344 (7,317) (4,419) (8,156) 62,452 Net income (loss) attributable to non-controlling interests — — — (36) (36) Net income (loss) attributable to BOK Financial Corp. shareholders $ 82,344 $ (7,317) $ (4,419) $ (8,120) $ 62,488 Average assets $ 29,823,905 $ 10,273,890 $ 21,323,795 $ (10,860,516) $ 50,561,074 Reportable segments reconciliation to the Consolidated Financial Statements for the three months ended March 31, 2021 is as follows (in thousands): Commercial Consumer Wealth Funds Management and Other BOK Net interest revenue from external sources $ 155,799 $ 16,686 $ 48,554 $ 59,381 $ 280,420 Net interest revenue (expense) from internal sources (25,794) 4,288 (200) 21,706 — Net interest revenue 130,005 20,974 48,354 81,087 280,420 Net loans charged off and provision for credit losses 13,985 1,136 (29) (40,092) (25,000) Net interest revenue after provision for credit losses 116,020 19,838 48,383 121,179 305,420 Other operating revenue 46,579 52,282 66,123 12,070 177,054 Other operating expense 66,979 55,622 78,565 94,618 295,784 Net direct contribution 95,620 16,498 35,941 38,631 186,690 Gain (loss) on financial instruments, net 33 (29,616) — 29,583 — Change in fair value of mortgage servicing rights — 33,874 — (33,874) — Gain (loss) on repossessed assets, net 12,737 41 — (12,778) — Corporate expense allocations 12,734 11,475 9,887 (34,096) — Net income before taxes 95,656 9,322 26,054 55,658 186,690 Federal and state income taxes 25,983 2,374 6,672 7,353 42,382 Net income 69,673 6,948 19,382 48,305 144,308 Net income (loss) attributable to non-controlling interests — — — (1,752) (1,752) Net income attributable to BOK Financial Corp. shareholders $ 69,673 $ 6,948 $ 19,382 $ 50,057 $ 146,060 Average assets $ 28,047,052 $ 9,755,539 $ 18,645,865 $ (6,137,823) $ 50,310,633

Fees and Commissions Revenue _2

Fees and Commissions Revenue Fees and Commissions Rvenue (Tables)	3 Months Ended
	Mar. 31, 2022
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 March 31, 2022. Commercial Consumer Wealth Management Funds Management & Other Consolidated Out of Scope 1 In Scope 2 Trading revenue $ — $ — $ (54,048) $ — $ (54,048) $ (54,048) $ — Customer hedging revenue 12,979 — 817 (2,858) 10,938 10,938 — Retail brokerage revenue — — 4,610 — 4,610 — 4,610 Insurance brokerage revenue — — 3,738 — 3,738 — 3,738 Investment banking revenue 3,358 — 4,325 — 7,683 3,099 4,584 Brokerage and trading revenue 16,337 — (40,558) (2,858) (27,079) (40,011) 12,932 TransFund EFT network revenue 18,153 886 (17) 1 19,023 — 19,023 Merchant services revenue 3,641 10 — — 3,651 — 3,651 Corporate card revenue 1,376 — 76 90 1,542 — 1,542 Transaction card revenue 23,170 896 59 91 24,216 — 24,216 Personal trust revenue — — 24,797 — 24,797 — 24,797 Corporate trust revenue — — 3,958 — 3,958 — 3,958 Institutional trust & retirement plan services revenue — — 12,567 — 12,567 — 12,567 Investment management services and other revenue — — 5,121 (44) 5,077 — 5,077 Fiduciary and asset management revenue — — 46,443 (44) 46,399 — 46,399 Commercial account service charge revenue 13,131 450 513 — 14,094 — 14,094 Overdraft fee revenue 31 6,193 23 — 6,247 — 6,247 Check card revenue — 5,545 — — 5,545 — 5,545 Automated service charge and other deposit fee revenue 23 1,107 (14) 2 1,118 — 1,118 Deposit service charges and fees 13,185 13,295 522 2 27,004 — 27,004 Mortgage production revenue — 5,055 — — 5,055 5,055 — Mortgage servicing revenue — 12,076 — (481) 11,595 11,595 — Mortgage banking revenue — 17,131 — (481) 16,650 16,650 — Other revenue 4,272 2,655 18,557 (15,039) 10,445 7,275 3,170 Total fees and commissions revenue $ 56,964 $ 33,977 $ 25,023 $ (18,329) $ 97,635 $ (16,086) $ 113,721 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 March 31, 2021. Commercial Consumer Wealth Management Funds Management & Other Consolidated Out of Scope 1 In Scope 2 Trading revenue $ — $ — $ 3,716 $ — $ 3,716 $ 3,716 $ — Customer hedging revenue 4,207 — 91 (1,706) 2,592 2,592 — Retail brokerage revenue — — 4,741 — 4,741 — 4,741 Insurance brokerage revenue — — 2,916 — 2,916 — 2,916 Investment banking revenue 2,258 — 4,768 (209) 6,817 2,049 4,768 Brokerage and trading revenue 6,465 — 16,232 (1,915) 20,782 8,357 12,425 TransFund EFT network revenue 18,443 834 (13) 2 19,266 — 19,266 Merchant services revenue 2,266 16 — (1) 2,281 — 2,281 Corporate card revenue 804 — 28 51 883 — 883 Transaction card revenue 21,513 850 15 52 22,430 — 22,430 Personal trust revenue — — 21,977 — 21,977 — 21,977 Corporate trust revenue — — 3,789 — 3,789 — 3,789 Institutional trust & retirement plan services revenue — — 12,610 — 12,610 — 12,610 Investment management services and other revenue — — 2,903 43 2,946 — 2,946 Fiduciary and asset management revenue — — 41,279 43 41,322 — 41,322 Commercial account service charge revenue 11,988 434 581 1 13,004 — 13,004 Overdraft fee revenue 26 4,635 19 — 4,680 — 4,680 Check card revenue — 5,327 — — 5,327 — 5,327 Automated service charge and other deposit fee revenue 26 1,150 23 (1) 1,198 — 1,198 Deposit service charges and fees 12,040 11,546 623 — 24,209 — 24,209 Mortgage production revenue — 25,287 — — 25,287 25,287 — Mortgage servicing revenue — 12,277 — (451) 11,826 11,826 — Mortgage banking revenue — 37,564 — (451) 37,113 37,113 — Other revenue 9,829 2,340 7,535 (3,408) 16,296 13,143 3,153 Total fees and commissions revenue $ 49,847 $ 52,300 $ 65,684 $ (5,679) $ 162,152 $ 58,613 $ 103,539 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)	3 Months Ended
	Mar. 31, 2022
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 March 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 $ 13,513 $ 4,978 $ 8,535 $ — Residential agency mortgage-backed securities 4,827,504 — 4,827,504 — Municipal securities 24,539 — 24,539 — Other trading securities 25,540 — 25,540 — Total trading securities 4,891,096 4,978 4,886,118 — Available for sale securities: U.S. Treasury 947 947 — — Municipal securities 526,322 — 526,322 — Residential agency mortgage-backed securities 7,612,021 — 7,612,021 — Residential non-agency mortgage-backed securities 347,187 — 347,187 — Commercial agency mortgage-backed securities 4,407,585 — 4,407,585 — Other debt securities 472 — — 472 Total available for sale securities 12,894,534 947 12,893,115 472 Fair value option securities – Residential agency mortgage-backed securities 185,003 — 185,003 — Residential mortgage loans held for sale 1 169,474 — 160,507 8,967 Mortgage servicing rights 2 209,563 — — 209,563 Derivative contracts, net of cash collateral 2,680,207 — 2,680,207 — Liabilities: Derivative contracts, net of cash collateral 557,834 — 557,834 — 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 95.07% 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. The fair value of financial assets and liabilities measured on a recurring basis was as follows as of December 31, 2021 (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 $ 23,610 $ 4,999 $ 18,611 $ — Residential agency mortgage-backed securities 9,068,900 — 9,068,900 — Municipal securities 25,783 — 25,783 — Other trading securities 18,520 — 18,520 — Total trading securities 9,136,813 4,999 9,131,814 — Available for sale securities: U.S. Treasury 1,000 1,000 — — Municipal securities 508,365 — 508,365 — Residential agency mortgage-backed securities 8,006,616 — 8,006,616 — Residential non-agency mortgage-backed securities 24,339 — 24,339 — Commercial agency mortgage-backed securities 4,617,025 — 4,617,025 — Other debt securities 472 — — 472 Total available for sale securities 13,157,817 1,000 13,156,345 472 Fair value option securities — Residential agency mortgage-backed securities 43,770 — 43,770 — Residential mortgage loans held for sale 1 192,295 — 185,969 6,326 Mortgage servicing rights 2 163,198 — — 163,198 Derivative contracts, net of cash collateral 1,097,297 8,331 1,088,966 — Liabilities: Derivative contracts, net of cash collateral 275,625 — 275,625 — 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 95.07% 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.
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 March 31, 2022 for which the fair value was adjusted during the three months ended March 31, 2022: Fair Value Adjustments for the Carrying Value at March 31, 2022 Three Months Ended Quoted Prices Significant Significant Gross charge-offs against allowance for loan losses Other gains (losses), net Nonaccruing loans $ — $ 4,168 $ 244 $ 818 $ — Real estate and other repossessed assets — 1,412 400 — 106 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 March 31, 2021 for which the fair value was adjusted during the three months ended March 31, 2021: Fair Value Adjustments for the Carrying Value at March 31, 2021 Three Months Ended Quoted Prices Significant Significant Gross charge-offs against allowance for loan losses Other gains (losses), net Nonaccruing loans $ — $ 259 $ 34,046 $ 15,049 $ — Real estate and other repossessed assets — 1,706 300 — (2,200)
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 March 31, 2022 follows (in thousands): Fair Value Valuation Technique(s) Unobservable Input Range Nonaccruing loans $ 244 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 3% - 25% (5%) 1 Real estate and other repossessed assets 400 Discounted cash flows Marketability adjustments off appraised value. 2 75% - 75% (75%) 1 Represents fair value as a percentage of the unpaid principal balance. 2 Marketability adjustments include consideration of estimated costs to sell which is approximately 10% of the fair value. A summary of quantitative information about Non-recurring Fair Value Measurements based on Significant Unobservable Inputs (Level 3) as of March 31, 2021 follows (in thousands): Fair Value Valuation Technique(s) Unobservable Input Range Nonaccruing loans $ 34,046 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 10% - 91% (47%) 1 Real estate and other repossessed assets 300 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 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 non-recurring basis as of March 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 $ 767,805 $ 767,805 $ 767,805 $ — $ — Interest-bearing cash and cash equivalents 599,976 599,976 599,976 — — Trading securities: U.S. government securities 13,513 13,513 4,978 8,535 — Residential agency mortgage-backed securities 4,827,504 4,827,504 — 4,827,504 — Municipal securities 24,539 24,539 — 24,539 — Other trading securities 25,540 25,540 — 25,540 — Total trading securities 4,891,096 4,891,096 4,978 4,886,118 — Investment securities: Municipal securities 177,683 184,214 — 41,920 142,294 Residential agency mortgage-backed securities 6,486 6,741 — 6,741 — Other debt securities 288 280 — 280 — Total investment securities 184,457 191,235 — 48,941 142,294 Allowance for credit losses (633) — — — — Investment securities, net of allowance 183,824 191,235 — 48,941 142,294 Available for sale securities: U.S. Treasury 947 947 947 — — Municipal securities 526,322 526,322 — 526,322 — Residential agency mortgage-backed securities 7,612,021 7,612,021 — 7,612,021 — Residential non-agency mortgage-backed securities 347,187 347,187 — 347,187 — Commercial agency mortgage-backed securities 4,407,585 4,407,585 — 4,407,585 — Other debt securities 472 472 — — 472 Total available for sale securities 12,894,534 12,894,534 947 12,893,115 472 Fair value option securities – Residential agency mortgage-backed securities 185,003 185,003 — 185,003 — Residential mortgage loans held for sale 169,474 169,474 — 160,507 8,967 Loans: Commercial 12,883,189 12,639,182 — — 12,639,182 Commercial real estate 4,100,956 3,985,876 — — 3,985,876 Paycheck protection program 137,365 134,313 — — 134,313 Loans to individuals 3,552,919 3,470,751 — — 3,470,751 Total loans 20,674,429 20,230,122 — — 20,230,122 Allowance for loan losses (246,473) — — — — Loans, net of allowance 20,427,956 20,230,122 — — 20,230,122 Mortgage servicing rights 209,563 209,563 — — 209,563 Derivative instruments with positive fair value, net of cash collateral 2,680,207 2,680,207 — 2,680,207 — Deposits with no stated maturity 37,911,535 37,911,535 — — 37,911,535 Time deposits 1,514,416 1,498,269 — — 1,498,269 Other borrowed funds 1,104,575 1,102,079 — — 1,102,079 Subordinated debentures 131,209 138,623 — 138,623 — Derivative instruments with negative fair value, net of cash collateral 557,834 557,834 — 557,834 — 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 non-recurring basis as of December 31, 2021 (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 $ 712,067 $ 712,067 $ 712,067 $ — $ — Interest-bearing cash and cash equivalents 2,125,343 2,125,343 2,125,343 — — Trading securities: U.S. government securities 23,610 23,610 4,999 18,611 — Residential agency mortgage-backed securities 9,068,900 9,068,900 — 9,068,900 — Municipal securities 25,783 25,783 — 25,783 — Other trading securities 18,520 18,520 — 18,520 — Total trading securities 9,136,813 9,136,813 4,999 9,131,814 — Investment securities: Municipal securities 203,772 223,609 — 57,698 165,911 Residential agency mortgage-backed securities 6,939 7,500 — 7,500 — Other debt securities 288 286 — 286 — Total investment securities 210,999 231,395 — 65,484 165,911 Allowance for credit losses (555) — — — — Investment securities, net of allowance 210,444 231,395 — 65,484 165,911 Available for sale securities: U.S. Treasury 1,000 1,000 1,000 — — Municipal securities 508,365 508,365 — 508,365 — Residential agency mortgage-backed securities 8,006,616 8,006,616 — 8,006,616 — Residential non-agency mortgage-backed securities 24,339 24,339 — 24,339 — Commercial agency mortgage-backed securities 4,617,025 4,617,025 — 4,617,025 — Other debt securities 472 472 — — 472 Total available for sale securities 13,157,817 13,157,817 1,000 13,156,345 472 Fair value option securities — Residential agency mortgage-backed securities 43,770 43,770 — 43,770 — Residential mortgage loans held for sale 192,295 192,295 — 185,969 6,326 Loans: Commercial 12,506,465 12,395,664 — — 12,395,664 Commercial real estate 3,831,325 3,786,767 — — 3,786,767 Paycheck protection program 276,341 269,912 — — 269,912 Loans to individuals 3,591,549 3,586,878 — — 3,586,878 Total loans 20,205,680 20,039,221 — — 20,039,221 Allowance for loan losses (256,421) — — — — Loans, net of allowance 19,949,259 20,039,221 — — 20,039,221 Mortgage servicing rights 163,198 163,198 — — 163,198 Derivative instruments with positive fair value, net of cash collateral 1,097,297 1,097,297 8,331 1,088,966 — Deposits with no stated maturity 39,537,731 39,537,731 — — 39,537,731 Time deposits 1,704,328 1,703,886 — — 1,703,886 Other borrowed funds 2,363,202 2,360,746 — — 2,360,746 Subordinated debentures 131,226 141,761 — 141,761 — Derivative instruments with negative fair value, net of cash collateral 275,625 275,625 — 275,625 —

Significant Accounting Polici_3

Significant Accounting Policies Loans and Allowance for Credit Losses (Details)	3 Months Ended
	Mar. 31, 2022
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	Mar. 31, 2022	Dec. 31, 2021
Schedule of Trading Securities [Line Items]
Trading securities	$ 4,891,096	$ 9,136,813
Trading Securities, Net Unrealized Gain (Loss)	(136,074)	(9,290)
U.S. government securities [Member]
Schedule of Trading Securities [Line Items]
Trading securities	13,513	23,610
Trading Securities, Net Unrealized Gain (Loss)	(10)	40
Residential agency mortgage-backed securities [Member]
Schedule of Trading Securities [Line Items]
Trading securities	4,827,504	9,068,900
Trading Securities, Net Unrealized Gain (Loss)	(135,438)	(9,338)
Municipal securities [Member]
Schedule of Trading Securities [Line Items]
Trading securities	24,539	25,783
Trading Securities, Net Unrealized Gain (Loss)	(478)	34
Other trading securities [Member]
Schedule of Trading Securities [Line Items]
Trading securities	25,540	18,520
Trading Securities, Net Unrealized Gain (Loss)	$ (148)	$ (26)

Investment (Held-to-Maturity) S

Investment (Held-to-Maturity) Securities (Details) $ in Thousands		3 Months Ended
		Mar. 31, 2022USD ($)	Dec. 31, 2021USD ($)
Schedule of Investment (Held-to-Maturity) Securities [Line Items]
Investment Securities, Gross Amortized Cost		$ 184,457	$ 210,999
Investment securities, Allowance for Credit Loss		(633)	(555)
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss		183,824	210,444
Investment Securities, Fair Value		191,235	231,395
Investment Securities, Gross Unrealized Gain		7,438	20,412
Investment Securities, Gross Unrealized Loss		$ (660)	$ (16)
Investment Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]
Investment Securities, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		38	3
Investment Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Investment Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 24,171	$ 273
Investment Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		568	587
Investment Securities, Continuous Unrealized Loss Position, Fair Value		24,739	860
Investment Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]
Investment Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		601	2
Investment Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		59	14
Investment Securities, Continuous Unrealized Loss Position, Accumulated Loss		660	16
Fixed Maturity Securities [Member]
Investment Securities, Debt Maturities, Net Carrying Value [Abstract]
Investment Securities, Debt Maturities, Less than One Year, Net Carrying Value		14,901
Investment Securities, Debt Maturities, One to Five Years, Net Carrying Value		104,681
Investment Securities, Debt Maturities, Six to Ten Years, Net Carrying Value		52,359
Investment Securities, Debt Maturities, Over Ten Years, Net Carrying Value		6,030
Investment Securities, Debt Maturities, Single Maturity Date, Net Carrying Value		177,971
Investment Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]
Investment Securities, Debt Maturities, Less Than One Year, Fair Value		15,080
Investment Securities, Debt Maturities, One to Five Years, Fair Value		110,636
Investment Securities, Debt Maturities, Six to Ten Years, Fair Value		52,834
Investment Securities, Debt Maturities, Over Ten Years, Fair Value		5,944
Investment Securities, Debt Maturities, Single Maturity Date, Fair Value		$ 184,494
Investment Securities, Debt Maturities, Weighted Average Maturity	[1]	4.55
Municipal securities [Member]
Schedule of Investment (Held-to-Maturity) Securities [Line Items]
Investment Securities, Gross Amortized Cost		$ 177,683	203,772
Investment Securities, Fair Value		184,214	223,609
Investment Securities, Gross Unrealized Gain		7,155	19,851
Investment Securities, Gross Unrealized Loss		$ (624)	$ (14)
Investment Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]
Investment Securities, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		35	1
Investment Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Investment Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 22,394	$ 0
Investment Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		544	587
Investment Securities, Continuous Unrealized Loss Position, Fair Value		22,938	587
Investment Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]
Investment Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		566	0
Investment Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		58	14
Investment Securities, Continuous Unrealized Loss Position, Accumulated Loss		624	14
Residential agency mortgage-backed securities [Member]
Schedule of Investment (Held-to-Maturity) Securities [Line Items]
Investment Securities, Gross Amortized Cost		6,486	6,939
Investment Securities, Fair Value		6,741	7,500
Investment Securities, Gross Unrealized Gain		283	561
Investment Securities, Gross Unrealized Loss		(28)	0
Investment Securities, Debt Maturities, Net Carrying Value [Abstract]
Investment Securities, Debt Maturities, without Single Maturity Date, Net Carrying Value	[2]	6,486
Investment Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]
Investment Securities, Debt Maturities, without Single Maturity Date, Fair Value		$ 6,741
Investment Securities, Debt Maturities, Average Expected Life of Mortgage-backed Securities		4 years 4 months 24 days
Investment Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]
Investment Securities, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		1
Investment Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Investment Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 1,534
Investment Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		0
Investment Securities, Continuous Unrealized Loss Position, Fair Value		1,534
Investment Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]
Investment Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		28
Investment Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		0
Investment Securities, Continuous Unrealized Loss Position, Accumulated Loss		28
Other debt securities [Member]
Schedule of Investment (Held-to-Maturity) Securities [Line Items]
Investment Securities, Gross Amortized Cost		288	288
Investment Securities, Fair Value		280	286
Investment Securities, Gross Unrealized Gain		0	0
Investment Securities, Gross Unrealized Loss		$ (8)	$ (2)
Investment Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]
Investment Securities, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		2	2
Investment Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Investment Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 243	$ 273
Investment Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		24	0
Investment Securities, Continuous Unrealized Loss Position, Fair Value		267	273
Investment Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]
Investment Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		7	2
Investment Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		1	0
Investment Securities, Continuous Unrealized Loss Position, Accumulated Loss		$ 8	$ 2
[1]	Expected maturities may differ from contractual maturities, because borrowers may have the right to call or prepay obligations with or without penalty.
[2]	The average expected lives of residential mortgage-backed securities were 4.4 years based upon current prepayment assumptions.

Available for Sale Securities (

Available for Sale Securities (Details) $ in Thousands		3 Months Ended
		Mar. 31, 2022USD ($)	Mar. 31, 2021USD ($)	Dec. 31, 2021USD ($)
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost		$ 13,441,131		$ 13,064,436
Available-for-sale Securities, Fair Value		12,894,534		13,157,817
Available-for-sale Securities, Gross Unrealized Gain		30,959		207,361
Available-for-sale Securities, Gross Unrealized Loss		(577,556)		$ (113,980)
Debt Securities, Available-for-sale, Realized Gain (Loss) [Abstract]
Available-for-sale Securities, Proceeds		55,185	$ 56,037
Available-for-sale Securities, Gross realized gains		1,933	473
Available-for-sale Securities, Gross realized losses		(996)	(6)
Available-for-sale Securities, Related federal and state income tax expense (benefit)		$ 219	$ 119
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		965		462
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 8,821,791		$ 4,911,358
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		400,881		80,372
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		2,297,660		1,476,208
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		176,675		33,608
Debt Securities, Available-for-sale, Unrealized Loss Position		11,119,451		6,387,566
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss		577,556		113,980
Asset Pledged as Collateral with Right
Debt Securities, Available-for-sale, Realized Gain (Loss) [Abstract]
Debt Securities		10,000,000		10,200,000
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		48,510
Available-for-sale Securities, Debt Maturities, One to Five Years, Amortized Cost Basis		1,968,389
Available-for-sale Securities, Debt Maturities, Six To Ten Years, Amortized Cost Basis		2,683,456
Available-for-sale Securities, Debt Maturities, Over Ten Years, Amortized Cost Basis		487,112
Available-for-sale Securities, Debt Maturities, Allocated and Single Maturity Date, Amortized Cost		5,187,467
Debt Securities, Available-for-sale, Maturity, Fair Value, Rolling Maturity [Abstract]
Available-for-sale Securities, Debt Maturities, Less than One Year, Fair Value		48,612
Available-for-sale Securities, Debt Maturities, One to Five Years, Fair Value		1,911,239
Available-for-sale Securities, Debt Maturities, Six to Ten Years, Fair Value		2,507,611
Available-for-sale Securities, Debt Maturities, Over Ten Years, Fair Value		467,864
Available-for-sale Securities, Debt Maturities, Allocated and Single Maturity Date, Fair Value		$ 4,935,326
Available-for-sale Securities, Debt Maturities, Weighted Average Maturity	[1]	6.59
U.S. Treasury [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost		$ 1,000		1,001
Available-for-sale Securities, Fair Value		947		1,000
Available-for-sale Securities, Gross Unrealized Gain		0		0
Available-for-sale Securities, Gross Unrealized Loss		$ (53)		$ (1)
Debt Securities, Available-for-sale, Realized Gain (Loss) [Abstract]
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		$ 947		$ 1,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		53		1
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		0		0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		0		0
Debt Securities, Available-for-sale, Unrealized Loss Position		947		1,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss		53		1
Municipal securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost		562,065		515,551
Available-for-sale Securities, Fair Value		526,322		508,365
Available-for-sale Securities, Gross Unrealized Gain		144		1,302
Available-for-sale Securities, Gross Unrealized Loss		$ (35,887)		$ (8,488)
Debt Securities, Available-for-sale, Realized Gain (Loss) [Abstract]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		202		175
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 400,690		$ 423,575
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		26,297		7,762
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		111,502		22,476
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		9,590		726
Debt Securities, Available-for-sale, Unrealized Loss Position		512,192		446,051
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss		35,887		8,488
Commercial agency mortgage-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost		4,623,902		4,628,172
Available-for-sale Securities, Fair Value		4,407,585		4,617,025
Available-for-sale Securities, Gross Unrealized Gain		2,809		36,868
Available-for-sale Securities, Gross Unrealized Loss		$ (219,126)		$ (48,015)
Debt Securities, Available-for-sale, Realized Gain (Loss) [Abstract]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		238		165
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 2,988,497		$ 2,104,689
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		177,409		35,488
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		773,363		703,216
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		41,717		12,527
Debt Securities, Available-for-sale, Unrealized Loss Position		3,761,860		2,807,905
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss		219,126		48,015
Other debt securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost		500		500
Available-for-sale Securities, Fair Value		472		472
Available-for-sale Securities, Gross Unrealized Gain		0		0
Available-for-sale Securities, Gross Unrealized Loss		$ (28)		$ (28)
Debt Securities, Available-for-sale, Realized Gain (Loss) [Abstract]
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, Less than 12 Months, Accumulated Loss		0		0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		472		472
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		28		28
Debt Securities, Available-for-sale, Unrealized Loss Position		472		472
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss		28		28
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]	8,253,664
Debt Securities, Available-for-sale, Maturity, Fair Value, Rolling Maturity [Abstract]
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value		$ 7,959,208
Available-for-sale Securities, Debt Maturities, Average Expected Life of Mortgage-backed Securities		4 years 3 months 18 days
Residential agency mortgage-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost		$ 7,913,760		7,908,587
Available-for-sale Securities, Fair Value		7,612,021		8,006,616
Available-for-sale Securities, Gross Unrealized Gain		14,727		155,477
Available-for-sale Securities, Gross Unrealized Loss		$ (316,466)		$ (57,448)
Debt Securities, Available-for-sale, Realized Gain (Loss) [Abstract]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		508		120
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 5,127,508		$ 2,382,094
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		191,126		37,121
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		1,412,323		750,044
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		125,340		20,327
Debt Securities, Available-for-sale, Unrealized Loss Position		6,539,831		3,132,138
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss		316,466		57,448
Residential non-agency mortgage-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost		339,904		10,625
Available-for-sale Securities, Fair Value		347,187		24,339
Available-for-sale Securities, Gross Unrealized Gain		13,279		13,714
Available-for-sale Securities, Gross Unrealized Loss		$ (5,996)		$ 0
Debt Securities, Available-for-sale, Realized Gain (Loss) [Abstract]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		15
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 304,149
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		5,996
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		0
Debt Securities, Available-for-sale, Unrealized Loss Position		304,149
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss		$ 5,996
[1]	Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without penalty.
[2]	The average expected lives of residential mortgage-backed securities were 4.3 years based upon current prepayment assumptions.

Securities Debt Securities, Ava

Securities Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value (Details) $ in Thousands	Mar. 31, 2022USD ($)	Dec. 31, 2021USD ($)
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	965	462
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 8,821,791	$ 4,911,358
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	2,297,660	1,476,208
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	11,119,451	6,387,566
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	400,881	80,372
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	176,675	33,608
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 577,556	$ 113,980
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	$ 947	$ 1,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	947	1,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	53	1
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 53	$ 1
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	202	175
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 400,690	$ 423,575
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	111,502	22,476
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	512,192	446,051
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	26,297	7,762
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	9,590	726
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 35,887	$ 8,488
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	508	120
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 5,127,508	$ 2,382,094
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	1,412,323	750,044
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	6,539,831	3,132,138
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	191,126	37,121
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	125,340	20,327
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 316,466	$ 57,448
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	15
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 304,149
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	304,149
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	5,996
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 5,996
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	238	165
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 2,988,497	$ 2,104,689
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	773,363	703,216
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	3,761,860	2,807,905
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	177,409	35,488
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	41,717	12,527
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 219,126	$ 48,015
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	472	472
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	472	472
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	28	28
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 28	$ 28

Securities Fair Value Option Se

Securities Fair Value Option Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Fair Value Option Securities [Line Items]
Fair value option securities, Fair Value	$ 185,003	$ 43,770
Residential agency mortgage-backed securities [Member]
Fair Value Option Securities [Line Items]
Fair value option securities, Fair Value	185,003	43,770
Fair value option securities, Net Unrealized Gain (Loss)	$ (4,017)	$ 1,591

Derivatives, Fair Value of Deri

Derivatives, Fair Value of Derivatives Contracts (Details) - USD ($) $ in Thousands	Mar. 31, 2022		Dec. 31, 2021
Derivative Assets, Fair Value, Net [Abstract]
Derviative contracts, net of cash collateral, Assets, Fair value	$ 2,680,207		$ 1,097,297
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Fair Value, Net of Cash Collateral	557,834		275,625
Not Designated as Hedging Instrument [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional	40,334,338	[1]	45,694,922	[2]
Derivative Liabilities, Notional	37,883,229	[1]	50,930,000	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value	3,484,734		1,588,528
Derivative Assets, Netting Adjustments	(766,540)		(490,268)
Derivative Assets, Net Fair Value Before Cash Collateral	2,718,194		1,098,260
Derivative Assets, Cash Collateral	(37,987)		(963)
Derviative contracts, net of cash collateral, Assets, Fair value	2,680,207		1,097,297
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value	3,499,311		1,627,386
Derivative Liabilities, Netting Adjustments	(766,540)		(490,268)
Derivative Liabilities, Net Fair Value Before Cash Collateral	2,732,771		1,137,118
Derivative Liabilities, Cash Collateral	(2,174,937)		(861,493)
Derivative Liabilities, Fair Value, Net of Cash Collateral	557,834		275,625
Not Designated as Hedging Instrument [Member] | Total customer risk management programs
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional	11,132,221	[1]	9,232,665	[2]
Derivative Liabilities, Notional	11,190,787	[1]	9,345,519	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value	2,932,726		1,438,147
Derivative Assets, Netting Adjustments	(548,111)		(385,725)
Derivative Assets, Net Fair Value Before Cash Collateral	2,384,615		1,052,422
Derivative Assets, Cash Collateral	(37,891)		(242)
Derviative contracts, net of cash collateral, Assets, Fair value	2,346,724		1,052,180
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value	2,960,456		1,472,882
Derivative Liabilities, Netting Adjustments	(548,111)		(385,725)
Derivative Liabilities, Net Fair Value Before Cash Collateral	2,412,345		1,087,157
Derivative Liabilities, Cash Collateral	(2,159,463)		(837,419)
Derivative Liabilities, Fair Value, Net of Cash Collateral	252,882		249,738
Not Designated as Hedging Instrument [Member] | Interest rate contracts [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional	2,901,463	[1]	2,614,162	[2]
Derivative Liabilities, Notional	2,901,463	[1]	2,614,162	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value	69,287		53,881
Derivative Assets, Netting Adjustments	(6,285)		(10,101)
Derivative Assets, Net Fair Value Before Cash Collateral	63,002		43,780
Derivative Assets, Cash Collateral	(24,595)		0
Derviative contracts, net of cash collateral, Assets, Fair value	38,407		43,780
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value	69,334		54,062
Derivative Liabilities, Netting Adjustments	(6,285)		(10,101)
Derivative Liabilities, Net Fair Value Before Cash Collateral	63,049		43,961
Derivative Liabilities, Cash Collateral	(61)		(33,870)
Derivative Liabilities, Fair Value, Net of Cash Collateral	62,988		10,091
Not Designated as Hedging Instrument [Member] | Energy contracts [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional	8,010,126	[1]	6,360,095	[2]
Derivative Liabilities, Notional	8,069,893	[1]	6,480,840	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value	2,683,519		1,168,363
Derivative Assets, Netting Adjustments	(541,826)		(375,624)
Derivative Assets, Net Fair Value Before Cash Collateral	2,141,693		792,739
Derivative Assets, Cash Collateral	(12,281)		0
Derviative contracts, net of cash collateral, Assets, Fair value	2,129,412		792,739
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value	2,712,617		1,210,946
Derivative Liabilities, Netting Adjustments	(541,826)		(375,624)
Derivative Liabilities, Net Fair Value Before Cash Collateral	2,170,791		835,322
Derivative Liabilities, Cash Collateral	(2,159,402)		(803,102)
Derivative Liabilities, Fair Value, Net of Cash Collateral	11,389		32,220
Not Designated as Hedging Instrument [Member] | Agricultural contracts [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional	0	[1]	0	[2]
Derivative Liabilities, Notional	0	[1]	0	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value	0		0
Derivative Assets, Netting Adjustments	0		0
Derivative Assets, Net Fair Value Before Cash Collateral	0		0
Derivative Assets, Cash Collateral	0		0
Derviative contracts, net of cash collateral, Assets, Fair value	0		0
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value	0		0
Derivative Liabilities, Netting Adjustments	0		0
Derivative Liabilities, Net Fair Value Before Cash Collateral	0		0
Derivative Liabilities, Cash Collateral	0		0
Derivative Liabilities, Fair Value, Net of Cash Collateral	0		0
Not Designated as Hedging Instrument [Member] | Foreign exchange contracts [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional	180,648	[1]	216,272	[2]
Derivative Liabilities, Notional	179,447	[1]	208,381	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value	179,024		215,148
Derivative Assets, Netting Adjustments	0		0
Derivative Assets, Net Fair Value Before Cash Collateral	179,024		215,148
Derivative Assets, Cash Collateral	(715)		0
Derviative contracts, net of cash collateral, Assets, Fair value	178,309		215,148
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value	177,609		207,119
Derivative Liabilities, Netting Adjustments	0		0
Derivative Liabilities, Net Fair Value Before Cash Collateral	177,609		207,119
Derivative Liabilities, Cash Collateral	0		(447)
Derivative Liabilities, Fair Value, Net of Cash Collateral	177,609		206,672
Not Designated as Hedging Instrument [Member] | Equity option contracts [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional	39,984	[1]	42,136	[2]
Derivative Liabilities, Notional	39,984	[1]	42,136	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value	896		755
Derivative Assets, Netting Adjustments	0		0
Derivative Assets, Net Fair Value Before Cash Collateral	896		755
Derivative Assets, Cash Collateral	(300)		(242)
Derviative contracts, net of cash collateral, Assets, Fair value	596		513
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value	896		755
Derivative Liabilities, Netting Adjustments	0		0
Derivative Liabilities, Net Fair Value Before Cash Collateral	896		755
Derivative Liabilities, Cash Collateral	0		0
Derivative Liabilities, Fair Value, Net of Cash Collateral	896		755
Not Designated as Hedging Instrument [Member] | Trading [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional	29,002,117	[1]	35,592,751	[2]
Derivative Liabilities, Notional	26,298,226	[1]	41,285,649	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value	550,075		139,694
Derivative Assets, Netting Adjustments	(218,429)		(104,326)
Derivative Assets, Net Fair Value Before Cash Collateral	331,646		35,368
Derivative Assets, Cash Collateral	(96)		(721)
Derviative contracts, net of cash collateral, Assets, Fair value	331,550		34,647
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value	525,699		152,947
Derivative Liabilities, Netting Adjustments	(218,429)		(104,326)
Derivative Liabilities, Net Fair Value Before Cash Collateral	307,270		48,621
Derivative Liabilities, Cash Collateral	(15,474)		(24,074)
Derivative Liabilities, Fair Value, Net of Cash Collateral	291,796		24,547
Not Designated as Hedging Instrument [Member] | Internal risk management programs [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional	200,000	[1]	869,506	[2]
Derivative Liabilities, Notional	394,216	[1]	298,832	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value	1,933		10,687
Derivative Assets, Netting Adjustments	0		(217)
Derivative Assets, Net Fair Value Before Cash Collateral	1,933		10,470
Derivative Assets, Cash Collateral	0		0
Derviative contracts, net of cash collateral, Assets, Fair value	1,933		10,470
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value	13,156		1,557
Derivative Liabilities, Netting Adjustments	0		(217)
Derivative Liabilities, Net Fair Value Before Cash Collateral	13,156		1,340
Derivative Liabilities, Cash Collateral	0		0
Derivative Liabilities, Fair Value, Net of Cash Collateral	$ 13,156		$ 1,340
[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
		Mar. 31, 2022	Mar. 31, 2021
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract]
Brokergage and Trading Revenue		$ 42,013	$ (68,667)
Gain (Loss) on Derivatives, Net		(46,981)	(27,650)
Total customer risk management programs
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract]
Brokergage and Trading Revenue		10,939	2,592
Gain (Loss) on Derivatives, Net		0	0
Interest rate contracts [Member]
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract]
Brokergage and Trading Revenue		6,342	1,388
Gain (Loss) on Derivatives, Net		0	0
Energy contracts [Member]
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract]
Brokergage and Trading Revenue		4,449	1,020
Gain (Loss) on Derivatives, Net		0	0
Agricultural contracts [Member]
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract]
Brokergage and Trading Revenue		0	18
Gain (Loss) on Derivatives, Net		0	0
Foreign exchange contracts [Member]
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract]
Brokergage and Trading Revenue		148	166
Gain (Loss) on Derivatives, Net		0	0
Equity option contracts [Member]
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract]
Brokergage and Trading Revenue		0	0
Gain (Loss) on Derivatives, Net		0	0
Trading [Member]
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract]
Brokergage and Trading Revenue	[1]	31,074	(71,259)
Gain (Loss) on Derivatives, Net	[1]	0	0
Internal risk management programs [Member]
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract]
Brokergage and Trading Revenue		0	0
Gain (Loss) on Derivatives, Net		$ (46,981)	$ (27,650)
[1]	Represents changes in fair value of to-be-announced securities and other derivative instruments held to mitigate market risk of trading securities portfolio, which is offset by changes in fair value of trading securities also included in Brokerage and Trading Revenue in the Consolidated Statements of Earnings.

Loans and Allowance for Credit

Loans and Allowance for Credit Losses, Loans by Portfolio Type (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Loan receivables disclosure [Abstract]
Loans, fixed rate of interest	$ 6,410,911	$ 6,603,265
Loans, variable rate of interest	14,139,272	13,468,356
Loans, non-accrual	124,246	134,059
Total	20,674,429	20,205,680
Credit Commitments [Abstract]
Outstanding commitments to extend credit	12,500,000
Outstanding standby letters of credit	654,000
Commercial [Member]
Loan receivables disclosure [Abstract]
Loans, fixed rate of interest	3,343,185	3,360,117
Loans, variable rate of interest	9,479,667	9,072,244
Loans, non-accrual	60,337	74,104
Total	12,883,189	12,506,465
Commercial real estate [Member]
Loan receivables disclosure [Abstract]
Loans, fixed rate of interest	924,332	929,015
Loans, variable rate of interest	3,160,635	2,888,048
Loans, non-accrual	15,989	14,262
Total	4,100,956	3,831,325
Paycheck Protection Program [Member]
Loan receivables disclosure [Abstract]
Loans, fixed rate of interest	137,365	276,341
Loans, variable rate of interest	0	0
Loans, non-accrual	0	0
Total	137,365	276,341
Loans to individuals [Member]
Loan receivables disclosure [Abstract]
Loans, fixed rate of interest	2,006,029	2,037,792
Loans, variable rate of interest	1,498,970	1,508,064
Loans, non-accrual	47,920	45,693
Total	$ 3,552,919	$ 3,591,549

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
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 256,421	$ 388,640
Provision for loan losses	(3,967)	(21,770)
Loans charged off	(7,805)	(16,905)
Recoveries of loans previously charged off	1,824	2,437
Ending balance	246,473	352,402
Provision Details [Abstract]
Change in provision primarily due to continued strength in commodity prices partially offset by changes in our economic outlook	(7,300)
Other changes to provision	6,600
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	32,977	36,921
Provision for off-balance sheet credit risk	3,268	(4,044)
Ending balance	36,245	32,877
Recorded investment [Abstract]
Collectively measured for impairment, recorded investment	20,550,183		$ 20,071,621
Individually measured for impairment, recorded investment	124,246		134,059
Total	20,674,429		20,205,680
Related allowance [Abstract]
Collectively measured for impairment, related allowance	243,185		250,079
Individually measured for impairment, related allowance	3,288		6,342
Total	246,473		256,421
Commercial [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	162,056	254,934
Provision for loan losses	(5,118)	(9,893)
Loans charged off	(6,081)	(15,345)
Recoveries of loans previously charged off	591	1,676
Ending balance	151,448	231,372
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	13,812	14,422
Provision for off-balance sheet credit risk	154	(1,686)
Ending balance	13,966	12,736
Recorded investment [Abstract]
Collectively measured for impairment, recorded investment	12,822,852		12,432,361
Individually measured for impairment, recorded investment	60,337		74,104
Total	12,883,189		12,506,465
Related allowance [Abstract]
Collectively measured for impairment, related allowance	149,095		158,063
Individually measured for impairment, related allowance	2,353		3,993
Total	151,448		162,056
Commercial real estate [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	58,553	86,558
Provision for loan losses	468	(4,579)
Loans charged off	(191)	(263)
Recoveries of loans previously charged off	144	30
Ending balance	58,974	81,746
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	17,442	20,571
Provision for off-balance sheet credit risk	3,023	(2,273)
Ending balance	20,465	18,298
Recorded investment [Abstract]
Collectively measured for impairment, recorded investment	4,084,967		3,817,063
Individually measured for impairment, recorded investment	15,989		14,262
Total	4,100,956		3,831,325
Related allowance [Abstract]
Collectively measured for impairment, related allowance	58,039		56,204
Individually measured for impairment, related allowance	935		2,349
Total	58,974		58,553
Paycheck Protection Program [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	0	0
Provision for loan losses	0	0
Loans charged off	0	0
Recoveries of loans previously charged off	0	0
Ending balance	0	0
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	0	0
Provision for off-balance sheet credit risk	0	0
Ending balance	0	0
Recorded investment [Abstract]
Collectively measured for impairment, recorded investment	137,365		276,341
Individually measured for impairment, recorded investment	0		0
Total	137,365		276,341
Related allowance [Abstract]
Collectively measured for impairment, related allowance	0		0
Individually measured for impairment, related allowance	0		0
Total	0		0
Loans to individuals [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	35,812	47,148
Provision for loan losses	683	(7,298)
Loans charged off	(1,533)	(1,297)
Recoveries of loans previously charged off	1,089	731
Ending balance	36,051	39,284
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	1,723	1,928
Provision for off-balance sheet credit risk	91	(85)
Ending balance	1,814	$ 1,843
Recorded investment [Abstract]
Collectively measured for impairment, recorded investment	3,504,999		3,545,856
Individually measured for impairment, recorded investment	47,920		45,693
Total	3,552,919		3,591,549
Related allowance [Abstract]
Collectively measured for impairment, related allowance	36,051		35,812
Individually measured for impairment, related allowance	0		0
Total	$ 36,051		$ 35,812

Loans and Allowances for Cred_4

Loans and Allowances for Credit Losses, Credit Quality Indicators (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	$ 905,055	$ 3,678,190
Financing Receivable, Originated, Year Two	3,572,534	2,680,781
Financing Receivable, Originated, Year Three	2,542,803	2,305,870
Financing Receivable, Originated, Year Four	2,196,403	1,579,560
Financing Receivable, Originated, Year Five	1,495,368	1,250,651
Financing Receivable, Originated, More Than Five Years	3,971,169	3,124,953
Financing Receivable, Revolving	5,955,046	5,559,595
Financing Receivable, Revolving, Converted to Term Loan	36,051	26,080
Total	20,674,429	20,205,680
Commercial [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	507,164	2,115,523
Financing Receivable, Originated, Year Two	1,921,320	1,284,235
Financing Receivable, Originated, Year Three	1,209,815	1,142,464
Financing Receivable, Originated, Year Four	1,098,515	995,008
Financing Receivable, Originated, Year Five	936,611	761,286
Financing Receivable, Originated, More Than Five Years	2,285,863	1,725,540
Financing Receivable, Revolving	4,911,235	4,479,513
Financing Receivable, Revolving, Converted to Term Loan	12,666	2,896
Total	12,883,189	12,506,465
Commercial [Member] | Energy [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	102,694	263,341
Financing Receivable, Originated, Year Two	156,718	73,425
Financing Receivable, Originated, Year Three	68,821	17,099
Financing Receivable, Originated, Year Four	16,817	14,362
Financing Receivable, Originated, Year Five	12,618	4,741
Financing Receivable, Originated, More Than Five Years	9,757	8,195
Financing Receivable, Revolving	2,820,342	2,625,721
Financing Receivable, Revolving, Converted to Term Loan	9,900	0
Total	3,197,667	3,006,884
Commercial [Member] | Healthcare [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	140,071	570,635
Financing Receivable, Originated, Year Two	581,679	589,193
Financing Receivable, Originated, Year Three	549,379	559,276
Financing Receivable, Originated, Year Four	557,169	506,083
Financing Receivable, Originated, Year Five	490,451	330,231
Financing Receivable, Originated, More Than Five Years	954,699	698,828
Financing Receivable, Revolving	168,260	160,668
Financing Receivable, Revolving, Converted to Term Loan	24	26
Total	3,441,732	3,414,940
Commercial [Member] | Services [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	54,992	696,626
Financing Receivable, Originated, Year Two	634,931	405,992
Financing Receivable, Originated, Year Three	368,549	295,371
Financing Receivable, Originated, Year Four	272,045	287,001
Financing Receivable, Originated, Year Five	257,921	244,397
Financing Receivable, Originated, More Than Five Years	952,629	799,961
Financing Receivable, Revolving	809,679	637,278
Financing Receivable, Revolving, Converted to Term Loan	749	567
Total	3,351,495	3,367,193
Commercial [Member] | General business [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	209,407	584,921
Financing Receivable, Originated, Year Two	547,992	215,625
Financing Receivable, Originated, Year Three	223,066	270,718
Financing Receivable, Originated, Year Four	252,484	187,562
Financing Receivable, Originated, Year Five	175,621	181,917
Financing Receivable, Originated, More Than Five Years	368,778	218,556
Financing Receivable, Revolving	1,112,954	1,055,846
Financing Receivable, Revolving, Converted to Term Loan	1,993	2,303
Total	2,892,295	2,717,448
Commercial real estate [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	279,254	717,400
Financing Receivable, Originated, Year Two	921,473	711,231
Financing Receivable, Originated, Year Three	695,399	879,359
Financing Receivable, Originated, Year Four	834,058	423,127
Financing Receivable, Originated, Year Five	412,134	294,436
Financing Receivable, Originated, More Than Five Years	850,833	687,894
Financing Receivable, Revolving	107,780	117,847
Financing Receivable, Revolving, Converted to Term Loan	25	31
Total	4,100,956	3,831,325
Paycheck Protection Program [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0	237,357
Financing Receivable, Originated, Year Two	113,697	38,984
Financing Receivable, Originated, Year Three	23,668	0
Financing Receivable, Originated, Year Four	0	0
Financing Receivable, Originated, Year Five	0	0
Financing Receivable, Originated, More Than Five Years	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Revolving, Converted to Term Loan	0	0
Total	137,365	276,341
Loans to individuals [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	118,637	607,910
Financing Receivable, Originated, Year Two	616,044	646,331
Financing Receivable, Originated, Year Three	613,921	284,047
Financing Receivable, Originated, Year Four	263,830	161,425
Financing Receivable, Originated, Year Five	146,623	194,929
Financing Receivable, Originated, More Than Five Years	834,473	711,519
Financing Receivable, Revolving	936,031	962,235
Financing Receivable, Revolving, Converted to Term Loan	23,360	23,153
Total	3,552,919	3,591,549
Loans to individuals [Member] | Residential mortgage [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	77,848	387,706
Financing Receivable, Originated, Year Two	394,629	454,346
Financing Receivable, Originated, Year Three	430,536	84,540
Financing Receivable, Originated, Year Four	71,273	62,358
Financing Receivable, Originated, Year Five	51,011	68,925
Financing Receivable, Originated, More Than Five Years	352,616	318,373
Financing Receivable, Revolving	322,831	323,497
Financing Receivable, Revolving, Converted to Term Loan	22,762	22,425
Total	1,723,506	1,722,170
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	699
Financing Receivable, Originated, Year Two	1,080	11,380
Financing Receivable, Originated, Year Three	11,379	21,909
Financing Receivable, Originated, Year Four	17,859	28,791
Financing Receivable, Originated, Year Five	25,226	33,377
Financing Receivable, Originated, More Than Five Years	267,037	258,017
Financing Receivable, Revolving	0	0
Financing Receivable, Revolving, Converted to Term Loan	0	0
Total	322,581	354,173
Loans to individuals [Member] | Personal [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	40,789	219,505
Financing Receivable, Originated, Year Two	220,335	180,605
Financing Receivable, Originated, Year Three	172,006	177,598
Financing Receivable, Originated, Year Four	174,698	70,276
Financing Receivable, Originated, Year Five	70,386	92,627
Financing Receivable, Originated, More Than Five Years	214,820	135,129
Financing Receivable, Revolving	613,200	638,738
Financing Receivable, Revolving, Converted to Term Loan	598	728
Total	1,506,832	1,515,206
Performing [Member] | Commercial [Member] | Energy [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	102,694	252,133
Financing Receivable, Originated, Year Two	156,167	29,556
Financing Receivable, Originated, Year Three	48,775	15,914
Financing Receivable, Originated, Year Four	15,678	13,548
Financing Receivable, Originated, Year Five	11,925	4,741
Financing Receivable, Originated, More Than Five Years	8,450	6,765
Financing Receivable, Revolving	2,753,419	2,540,525
Financing Receivable, Revolving, Converted to Term Loan	0	0
Total	3,097,108	2,863,182
Performing [Member] | Commercial [Member] | Energy [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0	558
Financing Receivable, Originated, Year Two	551	771
Financing Receivable, Originated, Year Three	642	0
Financing Receivable, Originated, Year Four	0	0
Financing Receivable, Originated, Year Five	0	0
Financing Receivable, Originated, More Than Five Years	0	0
Financing Receivable, Revolving	1,090	750
Financing Receivable, Revolving, Converted to Term Loan	0	0
Total	2,283	2,079
Performing [Member] | Commercial [Member] | Energy [Member] | Accruing Substandard [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0	10,650
Financing Receivable, Originated, Year Two	0	22,611
Financing Receivable, Originated, Year Three	0	1,185
Financing Receivable, Originated, Year Four	1,139	814
Financing Receivable, Originated, Year Five	693	0
Financing Receivable, Originated, More Than Five Years	705	716
Financing Receivable, Revolving	60,863	74,556
Financing Receivable, Revolving, Converted to Term Loan	9,900	0
Total	73,300	110,532
Performing [Member] | Commercial [Member] | Healthcare [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	140,071	563,800
Financing Receivable, Originated, Year Two	574,892	589,193
Financing Receivable, Originated, Year Three	549,379	516,558
Financing Receivable, Originated, Year Four	514,779	498,998
Financing Receivable, Originated, Year Five	483,909	319,096
Financing Receivable, Originated, More Than Five Years	933,344	688,136
Financing Receivable, Revolving	168,255	160,154
Financing Receivable, Revolving, Converted to Term Loan	24	26
Total	3,364,653	3,335,961
Performing [Member] | Commercial [Member] | Healthcare [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0	6,835
Financing Receivable, Originated, Year Two	6,787	0
Financing Receivable, Originated, Year Three	0	15,583
Financing Receivable, Originated, Year Four	15,417	0
Financing Receivable, Originated, Year Five	0	11,135
Financing Receivable, Originated, More Than Five Years	5,712	0
Financing Receivable, Revolving	5	5
Financing Receivable, Revolving, Converted to Term Loan	0	0
Total	27,921	33,558
Performing [Member] | Commercial [Member] | Healthcare [Member] | Accruing Substandard [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	27,135
Financing Receivable, Originated, Year Four	26,973	543
Financing Receivable, Originated, Year Five	0	0
Financing Receivable, Originated, More Than Five Years	7,109	1,981
Financing Receivable, Revolving	0	0
Financing Receivable, Revolving, Converted to Term Loan	0	0
Total	34,082	29,659
Performing [Member] | Commercial [Member] | Services [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	54,992	696,149
Financing Receivable, Originated, Year Two	634,506	405,057
Financing Receivable, Originated, Year Three	361,724	289,375
Financing Receivable, Originated, Year Four	266,054	275,010
Financing Receivable, Originated, Year Five	246,336	225,404
Financing Receivable, Originated, More Than Five Years	933,399	795,029
Financing Receivable, Revolving	779,824	607,958
Financing Receivable, Revolving, Converted to Term Loan	567	375
Total	3,277,402	3,294,357
Performing [Member] | Commercial [Member] | Services [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0	434
Financing Receivable, Originated, Year Two	415	405
Financing Receivable, Originated, Year Three	6,326	1,830
Financing Receivable, Originated, Year Four	1,989	1,047
Financing Receivable, Originated, Year Five	1,006	3,290
Financing Receivable, Originated, More Than Five Years	95	47
Financing Receivable, Revolving	22,419	17,210
Financing Receivable, Revolving, Converted to Term Loan	182	192
Total	32,432	24,455
Performing [Member] | Commercial [Member] | Services [Member] | Accruing Substandard [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0	43
Financing Receivable, Originated, Year Two	10	530
Financing Receivable, Originated, Year Three	499	4,166
Financing Receivable, Originated, Year Four	4,002	10,714
Financing Receivable, Originated, Year Five	10,579	1,785
Financing Receivable, Originated, More Than Five Years	2,990	2,366
Financing Receivable, Revolving	7,046	11,607
Financing Receivable, Revolving, Converted to Term Loan	0	0
Total	25,126	31,211
Performing [Member] | Commercial [Member] | General business [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	209,407	584,438
Financing Receivable, Originated, Year Two	547,777	211,892
Financing Receivable, Originated, Year Three	220,861	264,462
Financing Receivable, Originated, Year Four	250,546	177,384
Financing Receivable, Originated, Year Five	167,570	168,977
Financing Receivable, Originated, More Than Five Years	356,548	215,014
Financing Receivable, Revolving	1,102,054	1,047,420
Financing Receivable, Revolving, Converted to Term Loan	1,981	2,284
Total	2,856,744	2,671,871
Performing [Member] | Commercial [Member] | General business [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0	218
Financing Receivable, Originated, Year Two	0	223
Financing Receivable, Originated, Year Three	137	60
Financing Receivable, Originated, Year Four	0	1,435
Financing Receivable, Originated, Year Five	1,374	3,842
Financing Receivable, Originated, More Than Five Years	2,975	0
Financing Receivable, Revolving	8,100	5,875
Financing Receivable, Revolving, Converted to Term Loan	0	0
Total	12,586	11,653
Performing [Member] | Commercial [Member] | General business [Member] | Accruing Substandard [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0	265
Financing Receivable, Originated, Year Two	215	1,066
Financing Receivable, Originated, Year Three	957	1,634
Financing Receivable, Originated, Year Four	1,139	7,697
Financing Receivable, Originated, Year Five	5,673	8,336
Financing Receivable, Originated, More Than Five Years	9,231	3,024
Financing Receivable, Revolving	2,000	1,821
Financing Receivable, Revolving, Converted to Term Loan	0	0
Total	19,215	23,843
Performing [Member] | Commercial real estate [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	279,254	717,400
Financing Receivable, Originated, Year Two	921,473	711,231
Financing Receivable, Originated, Year Three	695,399	871,283
Financing Receivable, Originated, Year Four	826,150	403,115
Financing Receivable, Originated, Year Five	398,633	279,058
Financing Receivable, Originated, More Than Five Years	820,481	664,684
Financing Receivable, Revolving	107,780	117,847
Financing Receivable, Revolving, Converted to Term Loan	25	31
Total	4,049,195	3,764,649
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	6,660
Financing Receivable, Originated, Year Five	0	10,898
Financing Receivable, Originated, More Than Five Years	18,942	9,244
Financing Receivable, Revolving	0	0
Financing Receivable, Revolving, Converted to Term Loan	0	0
Total	18,942	26,802
Performing [Member] | Commercial real estate [Member] | Accruing Substandard [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	13,352
Financing Receivable, Originated, Year Five	13,501	4,480
Financing Receivable, Originated, More Than Five Years	3,329	7,780
Financing Receivable, Revolving	0	0
Financing Receivable, Revolving, Converted to Term Loan	0	0
Total	16,830	25,612
Performing [Member] | Paycheck Protection Program [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0	237,357
Financing Receivable, Originated, Year Two	113,697	38,984
Financing Receivable, Originated, Year Three	23,668	0
Financing Receivable, Originated, Year Four	0	0
Financing Receivable, Originated, Year Five	0	0
Financing Receivable, Originated, More Than Five Years	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Revolving, Converted to Term Loan	0	0
Total	137,365	276,341
Performing [Member] | Loans to individuals [Member] | Residential mortgage [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	77,813	386,092
Financing Receivable, Originated, Year Two	393,077	452,537
Financing Receivable, Originated, Year Three	427,965	84,001
Financing Receivable, Originated, Year Four	70,900	60,390
Financing Receivable, Originated, Year Five	48,809	68,150
Financing Receivable, Originated, More Than Five Years	330,626	295,632
Financing Receivable, Revolving	320,350	320,638
Financing Receivable, Revolving, Converted to Term Loan	21,887	21,463
Total	1,691,427	1,688,903
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
Financing Receivable, Originated, Year Two	35	0
Financing Receivable, Originated, Year Three	0	156
Financing Receivable, Originated, Year Four	17	0
Financing Receivable, Originated, Year Five	145	19
Financing Receivable, Originated, More Than Five Years	284	411
Financing Receivable, Revolving	552	282
Financing Receivable, Revolving, Converted to Term Loan	210	159
Total	1,243	1,027
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	98
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	127
Financing Receivable, Originated, More Than Five Years	53	41
Financing Receivable, Revolving	26	400
Financing Receivable, Revolving, Converted to Term Loan	0	0
Total	79	666
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	699
Financing Receivable, Originated, Year Two	1,080	11,380
Financing Receivable, Originated, Year Three	11,379	20,650
Financing Receivable, Originated, Year Four	15,778	27,970
Financing Receivable, Originated, Year Five	23,480	32,742
Financing Receivable, Originated, More Than Five Years	253,872	246,871
Financing Receivable, Revolving	0	0
Financing Receivable, Revolving, Converted to Term Loan	0	0
Total	305,589	340,312
Performing [Member] | Loans to individuals [Member] | Personal [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	40,789	218,960
Financing Receivable, Originated, Year Two	219,748	180,577
Financing Receivable, Originated, Year Three	171,964	177,389
Financing Receivable, Originated, Year Four	174,523	70,249
Financing Receivable, Originated, Year Five	70,349	92,592
Financing Receivable, Originated, More Than Five Years	214,736	135,041
Financing Receivable, Revolving	613,114	638,713
Financing Receivable, Revolving, Converted to Term Loan	598	728
Total	1,505,821	1,514,249
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
Financing Receivable, Originated, Year Two	49	9
Financing Receivable, Originated, Year Three	23	34
Financing Receivable, Originated, Year Four	0	3
Financing Receivable, Originated, Year Five	15	0
Financing Receivable, Originated, More Than Five Years	42	47
Financing Receivable, Revolving	15	0
Financing Receivable, Revolving, Converted to Term Loan	0	0
Total	144	93
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	435
Financing Receivable, Originated, Year Two	524	5
Financing Receivable, Originated, Year Three	0	165
Financing Receivable, Originated, Year Four	165	0
Financing Receivable, Originated, Year Five	0	0
Financing Receivable, Originated, More Than Five Years	0	1
Financing Receivable, Revolving	7	0
Financing Receivable, Revolving, Converted to Term Loan	0	0
Total	696	606
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
Financing Receivable, Originated, Year Two	0	20,487
Financing Receivable, Originated, Year Three	19,404	0
Financing Receivable, Originated, Year Four	0	0
Financing Receivable, Originated, Year Five	0	0
Financing Receivable, Originated, More Than Five Years	602	714
Financing Receivable, Revolving	4,970	9,890
Financing Receivable, Revolving, Converted to Term Loan	0	0
Total	24,976	31,091
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
Financing Receivable, Originated, Year Two	0	0
Financing Receivable, Originated, Year Three	0	0
Financing Receivable, Originated, Year Four	0	6,542
Financing Receivable, Originated, Year Five	6,542	0
Financing Receivable, Originated, More Than Five Years	8,534	8,711
Financing Receivable, Revolving	0	509
Financing Receivable, Revolving, Converted to Term Loan	0	0
Total	15,076	15,762
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
Financing Receivable, Originated, Year Two	0	0
Financing Receivable, Originated, Year Three	0	0
Financing Receivable, Originated, Year Four	0	230
Financing Receivable, Originated, Year Five	0	13,918
Financing Receivable, Originated, More Than Five Years	16,145	2,519
Financing Receivable, Revolving	390	503
Financing Receivable, Revolving, Converted to Term Loan	0	0
Total	16,535	17,170
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
Financing Receivable, Originated, Year Two	0	2,444
Financing Receivable, Originated, Year Three	1,111	4,562
Financing Receivable, Originated, Year Four	799	1,046
Financing Receivable, Originated, Year Five	1,004	762
Financing Receivable, Originated, More Than Five Years	24	518
Financing Receivable, Revolving	800	730
Financing Receivable, Revolving, Converted to Term Loan	12	19
Total	3,750	10,081
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
Financing Receivable, Originated, Year Two	0	0
Financing Receivable, Originated, Year Three	0	8,076
Financing Receivable, Originated, Year Four	7,908	0
Financing Receivable, Originated, Year Five	0	0
Financing Receivable, Originated, More Than Five Years	8,081	6,186
Financing Receivable, Revolving	0	0
Financing Receivable, Revolving, Converted to Term Loan	0	0
Total	15,989	14,262
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	35	1,516
Financing Receivable, Originated, Year Two	1,517	1,809
Financing Receivable, Originated, Year Three	2,571	383
Financing Receivable, Originated, Year Four	356	1,968
Financing Receivable, Originated, Year Five	2,057	629
Financing Receivable, Originated, More Than Five Years	21,653	22,289
Financing Receivable, Revolving	1,903	2,177
Financing Receivable, Revolving, Converted to Term Loan	665	803
Total	30,757	31,574
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
Financing Receivable, Originated, Year Two	0	0
Financing Receivable, Originated, Year Three	0	1,259
Financing Receivable, Originated, Year Four	2,081	821
Financing Receivable, Originated, Year Five	1,746	635
Financing Receivable, Originated, More Than Five Years	13,165	11,146
Financing Receivable, Revolving	0	0
Financing Receivable, Revolving, Converted to Term Loan	0	0
Total	16,992	13,861
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	110
Financing Receivable, Originated, Year Two	14	14
Financing Receivable, Originated, Year Three	19	10
Financing Receivable, Originated, Year Four	10	24
Financing Receivable, Originated, Year Five	22	35
Financing Receivable, Originated, More Than Five Years	42	40
Financing Receivable, Revolving	64	25
Financing Receivable, Revolving, Converted to Term Loan	0	0
Total	$ 171	$ 258

Loans and Allowances for Cred_5

Loans and Allowances for Credit Losses Loans and Allowances for Credit Losses, Nonaccrual (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	$ 124,246	$ 134,059
Financing Receivable, Nonaccrual, No Allowance	106,551	114,025
Financing Receivable, Nonaccrual, With Allowance	17,695	20,034
Financing Receivable, Nonaccrual, Related Allowance	3,288	6,343
Commercial [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	60,337	74,104
Financing Receivable, Nonaccrual, No Allowance	50,550	62,146
Financing Receivable, Nonaccrual, With Allowance	9,787	11,958
Financing Receivable, Nonaccrual, Related Allowance	2,353	3,994
Commercial [Member] | Energy [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	24,976	31,091
Financing Receivable, Nonaccrual, No Allowance	24,976	31,091
Financing Receivable, Nonaccrual, With Allowance	0	0
Financing Receivable, Nonaccrual, Related Allowance	0	0
Commercial [Member] | Healthcare [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	15,076	15,762
Financing Receivable, Nonaccrual, No Allowance	8,534	9,679
Financing Receivable, Nonaccrual, With Allowance	6,542	6,083
Financing Receivable, Nonaccrual, Related Allowance	946	53
Commercial [Member] | Services [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	16,535	17,170
Financing Receivable, Nonaccrual, No Allowance	13,290	13,686
Financing Receivable, Nonaccrual, With Allowance	3,245	3,484
Financing Receivable, Nonaccrual, Related Allowance	1,407	2,584
Commercial [Member] | General business [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	3,750	10,081
Financing Receivable, Nonaccrual, No Allowance	3,750	7,690
Financing Receivable, Nonaccrual, With Allowance	0	2,391
Financing Receivable, Nonaccrual, Related Allowance	0	1,357
Commercial real estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	15,989	14,262
Financing Receivable, Nonaccrual, No Allowance	8,081	6,186
Financing Receivable, Nonaccrual, With Allowance	7,908	8,076
Financing Receivable, Nonaccrual, Related Allowance	935	2,349
Loans to individuals [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	47,920	45,693
Financing Receivable, Nonaccrual, No Allowance	47,920	45,693
Financing Receivable, Nonaccrual, With Allowance	0	0
Financing Receivable, Nonaccrual, Related Allowance	0	0
Loans to individuals [Member] | Residential mortgage [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	30,757	31,574
Financing Receivable, Nonaccrual, No Allowance	30,757	31,574
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	171	258
Financing Receivable, Nonaccrual, No Allowance	171	258
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	16,992	13,861
Financing Receivable, Nonaccrual, No Allowance	16,992	13,861
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, Troubled Debt Restructurings (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled Debt Restructuring, Recorded Investment	$ 260,000,000		$ 273,000,000
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	124,000,000		141,000,000
Troubled Debt Restructuring, Recorded Balance Modified During the Period	18,000,000	$ 13,000,000
Troubled Debt Restructuring, Charge-offs	3,000	$ 306,000
Commercial real estate [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled Debt Restructuring, Specific Allowance	935,000
Nonperforming Financial Instruments [Member] | Commercial real estate [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled Debt Restructuring, Recorded Investment	12,000,000
Residential mortgage [Member] | Loans to individuals [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled Debt Restructuring, Specific Allowance	0
Residential mortgage [Member] | Nonperforming Financial Instruments [Member] | Loans to individuals [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled Debt Restructuring, Recorded Investment	20,000,000
US Government Agency Insured Loans [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	92,000,000		97,000,000
US Government Agency Insured Loans [Member] | Residential mortgage [Member] | Performing [Member] | Loans to individuals [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled Debt Restructuring, Recorded Investment	$ 204,000,000		$ 211,000,000

Loans and Allowances for Cred_7

Loans and Allowances for Credit Losses, By Aging Category (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	$ 109,590	$ 119,132
Current and Past Due Performing Loans	20,674,429	20,205,680
30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	67,820	43,102
60 to 89 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	6,265	27,870
90 Days or More [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	148,087	153,861
Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	20,452,257	19,980,847
Commercial [Member]
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	0	199
Current and Past Due Performing Loans	12,883,189	12,506,465
Commercial [Member] | 30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	2,734	9,904
Commercial [Member] | 60 to 89 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	1,518	9,333
Commercial [Member] | 90 Days or More [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	15,060	14,298
Commercial [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	12,863,877	12,472,930
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	3,197,667	3,006,884
Commercial [Member] | Energy [Member] | 30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	0	545
Commercial [Member] | Energy [Member] | 60 to 89 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	0	3,716
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	3,197,667	3,002,623
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	3,441,732	3,414,940
Commercial [Member] | Healthcare [Member] | 30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	1,300	2,359
Commercial [Member] | Healthcare [Member] | 60 to 89 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	141	0
Commercial [Member] | Healthcare [Member] | 90 Days or More [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	6,542	509
Commercial [Member] | Healthcare [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	3,433,749	3,412,072
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	3,351,495	3,367,193
Commercial [Member] | Services [Member] | 30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	743	920
Commercial [Member] | Services [Member] | 60 to 89 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	1,377	4,620
Commercial [Member] | Services [Member] | 90 Days or More [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	8,386	9,014
Commercial [Member] | Services [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	3,340,989	3,352,639
Commercial [Member] | General business [Member]
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	0	199
Current and Past Due Performing Loans	2,892,295	2,717,448
Commercial [Member] | General business [Member] | 30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	691	6,080
Commercial [Member] | General business [Member] | 60 to 89 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	0	997
Commercial [Member] | General business [Member] | 90 Days or More [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	132	4,775
Commercial [Member] | General business [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	2,891,472	2,705,596
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	4,100,956	3,831,325
Commercial real estate [Member] | 30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	4,473	0
Commercial real estate [Member] | 60 to 89 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	4,270	206
Commercial real estate [Member] | 90 Days or More [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	3,078	3,157
Commercial real estate [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	4,089,135	3,827,962
Paycheck Protection Program [Member]
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	307	74
Current and Past Due Performing Loans	137,365	276,341
Paycheck Protection Program [Member] | 30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	0	0
Paycheck Protection Program [Member] | 60 to 89 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	6	0
Paycheck Protection Program [Member] | 90 Days or More [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	307	0
Paycheck Protection Program [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	137,052	276,341
Loans to individuals [Member]
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	109,283	118,859
Current and Past Due Performing Loans	3,552,919	3,591,549
Loans to individuals [Member] | 30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	60,613	33,198
Loans to individuals [Member] | 60 to 89 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	471	18,331
Loans to individuals [Member] | 90 Days or More [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	129,642	136,406
Loans to individuals [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	3,362,193	3,403,614
Loans to individuals [Member] | Residential mortgage [Member]
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	0	0
Current and Past Due Performing Loans	1,723,506	1,722,170
Loans to individuals [Member] | Residential mortgage [Member] | 30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	9,334	6,263
Loans to individuals [Member] | Residential mortgage [Member] | 60 to 89 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	364	1,556
Loans to individuals [Member] | Residential mortgage [Member] | 90 Days or More [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	6,036	6,697
Loans to individuals [Member] | Residential mortgage [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	1,707,772	1,707,654
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	109,283	118,819
Current and Past Due Performing Loans	322,581	354,173
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	51,165	26,869
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	0	16,751
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	123,533	129,531
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	147,883	181,022
Loans to individuals [Member] | Personal [Member]
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	0	40
Current and Past Due Performing Loans	1,506,832	1,515,206
Loans to individuals [Member] | Personal [Member] | 30 to 59 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	114	66
Loans to individuals [Member] | Personal [Member] | 60 to 89 Days [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	107	24
Loans to individuals [Member] | Personal [Member] | 90 Days or More [Member]
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	73	178
Loans to individuals [Member] | Personal [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Current and Past Due Performing Loans	$ 1,506,538	$ 1,514,938

Mortgage Banking Activities, Co

Mortgage Banking Activities, Components of Loans Held For Sale (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Schedule of Residential Mortgage Loans Held For Sale [Line Items]
Number of days for past due for loan to be considered nonperforming (in days)	90 days		90 days
Residential mortgage loans held for sale, nonperforming	$ 0		$ 0
Credit losses recognized on residential mortgage loans held for sale	0	$ 0
Components of Residential Mortgage Loans Held for Sale [Abstract]
Unpaid principal balance	161,717		182,710
Residential mortgage loans held for sale, Fair value	159,355		186,175
Residential mortgage loans held for sale	$ 169,474		$ 192,295
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	$ 160,260		$ 171,412
Derivative, Net fair value	$ 2,869		$ 6,167
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	$ 310,237		$ 328,433
Derivative, Net fair value	$ 7,250		$ (47)

Mortgage Banking Activities Mor

Mortgage Banking Activities Mortgage Banking Activities, Mortgage Banking Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Mortgage Banking Revenue [Abstract]
Net realized gains on sale of mortgage loans	$ 6,883	$ 26,000
Net change in unrealized gain (loss) on mortgage loans held for sale	(5,827)	(6,955)
Net change in the fair value of mortgage loan commitments	(3,298)	(8,980)
Net change in the fair value of forward sales contracts	7,297	15,222
Total production revenue	5,055	25,287
Servicing revenue	11,595	11,826
Total mortgage banking revenue	$ 16,650	$ 37,113

Mortgage Banking Activities, Mo

Mortgage Banking Activities, Mortgage Servicing Rights (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2022USD ($)	Mar. 31, 2021USD ($)	Dec. 31, 2021USD ($)
Summary of Mortgage Servicing Rights [Abstract]
Number of residential mortgage loans serviced for others	99,409		102,008
Outstanding principal balance of residential mortgage loans serviced for others	$ 16,024,663,000		$ 16,442,446,000
Weighted average interest rate	3.57%		3.58%
Remaining term (in months)	281 months		281 months
Servicing Asset at Fair Value, Amount [Roll Forward]
Beginning balance	$ 163,198,000	$ 101,172,000	$ 101,172,000
Additions	5,215,000	9,830,000
Changes due to principal payments	(7,960,000)	(11,961,000)
Change in fair value due to market assumption changes	49,110,000	33,874,000
Ending balance	$ 209,563,000	$ 132,915,000	$ 163,198,000
Servicing Assets at Fair Value, Assumptions Used to Estimate Fair Value [Abstract]
Discount rate - risk-free rate plus a market premium (in hundredths)	8.53%		8.39%
Prepayment rate - based upon loan interest rate, original term and loan type	8.48%		12.11%
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)	1,000		1,000
Loan servicing costs - annually per loan based upon loan type, foreclosure, maximum (in dollars per loan)	$ 4,000		$ 4,000
Escrow earnings rate - indexed to rates paid on deposit accounts with comparable average life (in hundredths)	2.47%		1.32%
Primary secondary mortgage rate spread	105		105
Delinquency rate	2.28%		2.05%

Commitments and Contingent Li_2

Commitments and Contingent Liabilities (Details)	3 Months Ended
	Mar. 31, 2022USD ($)
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	$ 20,000,000
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
Pending Litigation [Member] | Inclusion of Proprietary Investment Products as Investment Options in 401k Plan Whose Fees Were Too High and Performance Too Low [Member]
Litigation Settlement [Abstract]
Loss Contingency, Number of Plaintiffs	3
Pending Litigation [Member] | Bank breached various fiduciary duties acting in its capacity as trustee of a trust that was a co-general partner of the partnership
Litigation Settlement [Abstract]
Loss Contingency, Damages Sought, Value	$ 60,000,000

Commitments and Contingent Li_3

Commitments and Contingent Liabilities Variable Interest Entities (Details) $ in Millions	Mar. 31, 2022USD ($)
Other Assets [Member]
Variable Interest Entity [Line Items]
Amortization Method Qualified Affordable Housing Project Investments	$ 360
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	May 03, 2022	Mar. 31, 2022	Mar. 31, 2021
Dividends declared (in dollars per share)		$ 0.53	$ 0.52
Schedule of Accumulated Other Income (Loss) [Abstract]
Balance, Beginning of Period		$ 72,371	$ 335,868
Net change in unrealized gain (loss)		(639,041)	(150,131)
Reclassification Adjustments Included in Earnings [Abstract]
Gain on available for sale securities, net		(937)	(467)
Other comprehensive income, before income taxes		(639,978)	(150,598)
Federal and state income taxes		(149,781)	(36,139)
Other comprehensive income, net of income taxes		(490,197)	(114,459)
Balance, End of Period		(417,826)	221,409
Accumulated Net Unrealized Gain (Loss) on Available for Sale Securities [Member]
Schedule of Accumulated Other Income (Loss) [Abstract]
Balance, Beginning of Period		69,775	335,032
Net change in unrealized gain (loss)		(639,041)	(150,131)
Reclassification Adjustments Included in Earnings [Abstract]
Gain on available for sale securities, net		(937)	(467)
Other comprehensive income, before income taxes		(639,978)	(150,598)
Federal and state income taxes		(149,781)	(36,139)
Other comprehensive income, net of income taxes		(490,197)	(114,459)
Balance, End of Period		(420,422)	220,573
Accumulated Unrealized Gain (Loss) on Employee Benefit Plans [Member]
Schedule of Accumulated Other Income (Loss) [Abstract]
Balance, Beginning of Period		2,596	836
Net change in unrealized gain (loss)		0	0
Reclassification Adjustments Included in Earnings [Abstract]
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		$ 2,596	$ 836
Subsequent Event [Member]
Dividends Payable, Date Declared	May 3, 2022
Dividends declared (in dollars per share)	$ 0.53
Dividends Payable, Date to be Paid	May 25, 2022
Dividends Payable, Date of Record	May 10, 2022

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Numerator: [Abstract]
Net income attributable to BOK Financial Corp. shareholders	$ 62,488	$ 146,060
Less: Earnings allocated to participating securities	451	937
Numerator for basic earnings per share – income available to common shareholders	62,037	145,123
Effect of reallocating undistributed earnings of participating securities	0	0
Numerator for diluted earnings per share – income available to common shareholders	$ 62,037	$ 145,123
Denominator: [Abstract]
Weighted average shares outstanding (in shares)	68,306,107	69,583,788
Less: Participating securities included in weighted average shares (in shares)	493,707	446,413
Denominator for basic earnings per common share (in shares)	67,812,400	69,137,375
Dilutive effect of employee stock compensation plans (in shares)	1,451	4,335
Denominator for diluted earnings per common share (in shares)	67,813,851	69,141,710
Basic earnings per share	$ 0.91	$ 2.10
Diluted earnings per share	$ 0.91	$ 2.10

Reportable Segments (Details)

Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Segment Reporting Information [Line Items]
Net interest revenue from external sources	$ 268,411	$ 280,420
Net interest revenue (expense) from internal sources	0	0
Net interest revenue	268,411	280,420
Provision for credit losses	0	(25,000)
Net interest revenue after provision for credit losses	268,411	305,420
Other operating revenue	87,856	177,054
Other operating expense	277,618	295,784
Net direct contribution	78,649	186,690
Gain (loss) on financial instruments, net	0	0
Change in fair value of mortgage servicing rights	0	0
Gain (loss) on repossessed assets, net	0	0
Corporate expense allocations	0	0
Net income before taxes	78,649	186,690
Federal and state income taxes	16,197	42,382
Net income	62,452	144,308
Net income (loss) attributable to non-controlling interests	(36)	(1,752)
Net income attributable to BOK Financial Corp. shareholders	62,488	146,060
Average assets	50,561,074	50,310,633
Operating Segments [Member] | Commercial [Member]
Segment Reporting Information [Line Items]
Net interest revenue from external sources	147,590	155,799
Net interest revenue (expense) from internal sources	(10,579)	(25,794)
Net interest revenue	137,011	130,005
Provision for credit losses	5,343	13,985
Net interest revenue after provision for credit losses	131,668	116,020
Other operating revenue	57,427	46,579
Other operating expense	65,114	66,979
Net direct contribution	123,981	95,620
Gain (loss) on financial instruments, net	(204)	33
Change in fair value of mortgage servicing rights	0	0
Gain (loss) on repossessed assets, net	1,793	12,737
Corporate expense allocations	16,246	12,734
Net income before taxes	109,324	95,656
Federal and state income taxes	26,980	25,983
Net income	82,344	69,673
Net income (loss) attributable to non-controlling interests	0	0
Net income attributable to BOK Financial Corp. shareholders	82,344	69,673
Average assets	29,823,905	28,047,052
Operating Segments [Member] | Consumer [Member]
Segment Reporting Information [Line Items]
Net interest revenue from external sources	16,915	16,686
Net interest revenue (expense) from internal sources	10,292	4,288
Net interest revenue	27,207	20,974
Provision for credit losses	1,112	1,136
Net interest revenue after provision for credit losses	26,095	19,838
Other operating revenue	33,961	52,282
Other operating expense	48,789	55,622
Net direct contribution	11,267	16,498
Gain (loss) on financial instruments, net	(57,895)	(29,616)
Change in fair value of mortgage servicing rights	49,110	33,874
Gain (loss) on repossessed assets, net	45	41
Corporate expense allocations	12,080	11,475
Net income before taxes	(9,553)	9,322
Federal and state income taxes	(2,236)	2,374
Net income	(7,317)	6,948
Net income (loss) attributable to non-controlling interests	0	0
Net income attributable to BOK Financial Corp. shareholders	(7,317)	6,948
Average assets	10,273,890	9,755,539
Operating Segments [Member] | Wealth Management [Member]
Segment Reporting Information [Line Items]
Net interest revenue from external sources	56,231	48,554
Net interest revenue (expense) from internal sources	(465)	(200)
Net interest revenue	55,766	48,354
Provision for credit losses	(71)	(29)
Net interest revenue after provision for credit losses	55,837	48,383
Other operating revenue	25,018	66,123
Other operating expense	74,495	78,565
Net direct contribution	6,360	35,941
Gain (loss) on financial instruments, net	0	0
Change in fair value of mortgage servicing rights	0	0
Gain (loss) on repossessed assets, net	0	0
Corporate expense allocations	12,062	9,887
Net income before taxes	(5,702)	26,054
Federal and state income taxes	(1,283)	6,672
Net income	(4,419)	19,382
Net income (loss) attributable to non-controlling interests	0	0
Net income attributable to BOK Financial Corp. shareholders	(4,419)	19,382
Average assets	21,323,795	18,645,865
Funds Management and Other [Member]
Segment Reporting Information [Line Items]
Net interest revenue from external sources	47,675	59,381
Net interest revenue (expense) from internal sources	752	21,706
Net interest revenue	48,427	81,087
Provision for credit losses	(6,384)	(40,092)
Net interest revenue after provision for credit losses	54,811	121,179
Other operating revenue	(28,550)	12,070
Other operating expense	89,220	94,618
Net direct contribution	(62,959)	38,631
Gain (loss) on financial instruments, net	58,099	29,583
Change in fair value of mortgage servicing rights	(49,110)	(33,874)
Gain (loss) on repossessed assets, net	(1,838)	(12,778)
Corporate expense allocations	(40,388)	(34,096)
Net income before taxes	(15,420)	55,658
Federal and state income taxes	(7,264)	7,353
Net income	(8,156)	48,305
Net income (loss) attributable to non-controlling interests	(36)	(1,752)
Net income attributable to BOK Financial Corp. shareholders	(8,120)	50,057
Average assets	$ (10,860,516)	$ (6,137,823)

Fees and Commissions Revenue _3

Fees and Commissions Revenue Fees and Commissions (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022		Mar. 31, 2021
Disaggregation of Revenue [Line Items]
Total fees and commissions	$ 97,635		$ 162,152
Fees and commissions revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	97,635		162,152
Fees and commission revenue not from contracts with customers	(16,086)	[1]	58,613	[2]
Fees and commissions revenue from contracts with customers	113,721	[3]	103,539	[4]
Brokerage and trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	(27,079)		20,782
Fees and commission revenue not from contracts with customers	(40,011)	[1]	8,357	[2]
Fees and commissions revenue from contracts with customers	12,932	[3]	12,425	[4]
Trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	(54,048)		3,716
Fees and commission revenue not from contracts with customers	(54,048)	[1]	3,716	[2]
Fees and commissions revenue from contracts with customers	0	[3]	0	[4]
Customer hedging revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	10,938		2,592
Fees and commission revenue not from contracts with customers	10,938	[1]	2,592	[2]
Fees and commissions revenue from contracts with customers	0	[3]	0	[4]
Retail brokerage revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	4,610		4,741
Fees and commission revenue not from contracts with customers	0	[1]	0	[2]
Fees and commissions revenue from contracts with customers	4,610	[3]	4,741	[4]
Insurance brokerage revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	3,738		2,916
Fees and commission revenue not from contracts with customers	0	[1]	0	[2]
Fees and commissions revenue from contracts with customers	3,738	[3]	2,916	[4]
Investment banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	7,683		6,817
Fees and commission revenue not from contracts with customers	3,099	[1]	2,049	[2]
Fees and commissions revenue from contracts with customers	4,584	[3]	4,768	[4]
Transaction card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	24,216		22,430
Fees and commission revenue not from contracts with customers	0	[1]	0	[2]
Fees and commissions revenue from contracts with customers	24,216	[3]	22,430	[4]
TransFund EFT network revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	19,023		19,266
Fees and commission revenue not from contracts with customers	0	[1]	0	[2]
Fees and commissions revenue from contracts with customers	19,023	[3]	19,266	[4]
Merchant services revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	3,651		2,281
Fees and commission revenue not from contracts with customers	0	[1]	0	[2]
Fees and commissions revenue from contracts with customers	3,651	[3]	2,281	[4]
Corporate card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	1,542		883
Fees and commission revenue not from contracts with customers	0	[1]	0	[2]
Fees and commissions revenue from contracts with customers	1,542	[3]	883	[4]
Fiduciary and asset management revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	46,399		41,322
Fees and commission revenue not from contracts with customers	0	[1]	0	[2]
Fees and commissions revenue from contracts with customers	46,399	[3]	41,322	[4]
Personal trust revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	24,797		21,977
Fees and commission revenue not from contracts with customers	0	[1]	0	[2]
Fees and commissions revenue from contracts with customers	24,797	[3]	21,977	[4]
Corporate trust revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	3,958		3,789
Fees and commission revenue not from contracts with customers	0	[1]	0	[2]
Fees and commissions revenue from contracts with customers	3,958	[3]	3,789	[4]
Institutional trust & retirement plan services revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	12,567		12,610
Fees and commission revenue not from contracts with customers	0	[1]	0	[2]
Fees and commissions revenue from contracts with customers	12,567	[3]	12,610	[4]
Investment management services and other revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	5,077		2,946
Fees and commission revenue not from contracts with customers	0	[1]	0	[2]
Fees and commissions revenue from contracts with customers	5,077	[3]	2,946	[4]
Deposit service charges and fees [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	27,004		24,209
Fees and commission revenue not from contracts with customers	0	[1]	0	[2]
Fees and commissions revenue from contracts with customers	27,004	[3]	24,209	[4]
Commercial account service charge revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	14,094		13,004
Fees and commission revenue not from contracts with customers	0	[1]	0	[2]
Fees and commissions revenue from contracts with customers	14,094	[3]	13,004	[4]
Overdraft fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	6,247		4,680
Fees and commission revenue not from contracts with customers	0	[1]	0	[2]
Fees and commissions revenue from contracts with customers	6,247	[3]	4,680	[4]
Check card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	5,545		5,327
Fees and commission revenue not from contracts with customers	0	[1]	0	[2]
Fees and commissions revenue from contracts with customers	5,545	[3]	5,327	[4]
Automated service charge and other deposit fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	1,118		1,198
Fees and commission revenue not from contracts with customers	0	[1]	0	[2]
Fees and commissions revenue from contracts with customers	1,118	[3]	1,198	[4]
Mortgage banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	16,650		37,113
Fees and commission revenue not from contracts with customers	16,650	[1]	37,113	[2]
Fees and commissions revenue from contracts with customers	0	[3]	0	[4]
Mortgage production revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	5,055		25,287
Fees and commission revenue not from contracts with customers	5,055	[1]	25,287	[2]
Fees and commissions revenue from contracts with customers	0	[3]	0	[4]
Mortgage servicing revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	11,595		11,826
Fees and commission revenue not from contracts with customers	11,595	[1]	11,826	[2]
Fees and commissions revenue from contracts with customers	0	[3]	0	[4]
Other revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	10,445		16,296
Fees and commission revenue not from contracts with customers	7,275	[1]	13,143	[2]
Fees and commissions revenue from contracts with customers	3,170	[3]	3,153	[4]
Operating Segments [Member] | Commercial [Member] | Fees and commissions revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	56,964		49,847
Operating Segments [Member] | Commercial [Member] | Brokerage and trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	16,337		6,465
Operating Segments [Member] | Commercial [Member] | Trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0
Operating Segments [Member] | Commercial [Member] | Customer hedging revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	12,979		4,207
Operating Segments [Member] | Commercial [Member] | Retail brokerage revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0
Operating Segments [Member] | Commercial [Member] | Insurance brokerage revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0
Operating Segments [Member] | Commercial [Member] | Investment banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	3,358		2,258
Operating Segments [Member] | Commercial [Member] | Transaction card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	23,170		21,513
Operating Segments [Member] | Commercial [Member] | TransFund EFT network revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	18,153		18,443
Operating Segments [Member] | Commercial [Member] | Merchant services revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	3,641		2,266
Operating Segments [Member] | Commercial [Member] | Corporate card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	1,376		804
Operating Segments [Member] | Commercial [Member] | Fiduciary and asset management revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0
Operating Segments [Member] | Commercial [Member] | Personal trust revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0
Operating Segments [Member] | Commercial [Member] | Corporate trust revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	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
Operating Segments [Member] | Commercial [Member] | Investment management services and other revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0
Operating Segments [Member] | Commercial [Member] | Deposit service charges and fees [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	13,185		12,040
Operating Segments [Member] | Commercial [Member] | Commercial account service charge revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	13,131		11,988
Operating Segments [Member] | Commercial [Member] | Overdraft fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	31		26
Operating Segments [Member] | Commercial [Member] | Check card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	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	23		26
Operating Segments [Member] | Commercial [Member] | Mortgage banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0
Operating Segments [Member] | Commercial [Member] | Mortgage production revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0
Operating Segments [Member] | Commercial [Member] | Mortgage servicing revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0
Operating Segments [Member] | Commercial [Member] | Other revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	4,272		9,829
Operating Segments [Member] | Consumer [Member] | Fees and commissions revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	33,977		52,300
Operating Segments [Member] | Consumer [Member] | Brokerage and trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0
Operating Segments [Member] | Consumer [Member] | Trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0
Operating Segments [Member] | Consumer [Member] | Customer hedging revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0
Operating Segments [Member] | Consumer [Member] | Retail brokerage revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0
Operating Segments [Member] | Consumer [Member] | Insurance brokerage revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0
Operating Segments [Member] | Consumer [Member] | Investment banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0
Operating Segments [Member] | Consumer [Member] | Transaction card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	896		850
Operating Segments [Member] | Consumer [Member] | TransFund EFT network revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	886		834
Operating Segments [Member] | Consumer [Member] | Merchant services revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	10		16
Operating Segments [Member] | Consumer [Member] | Corporate card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0
Operating Segments [Member] | Consumer [Member] | Fiduciary and asset management revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0
Operating Segments [Member] | Consumer [Member] | Personal trust revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0
Operating Segments [Member] | Consumer [Member] | Corporate trust revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	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
Operating Segments [Member] | Consumer [Member] | Investment management services and other revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0
Operating Segments [Member] | Consumer [Member] | Deposit service charges and fees [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	13,295		11,546
Operating Segments [Member] | Consumer [Member] | Commercial account service charge revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	450		434
Operating Segments [Member] | Consumer [Member] | Overdraft fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	6,193		4,635
Operating Segments [Member] | Consumer [Member] | Check card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	5,545		5,327
Operating Segments [Member] | Consumer [Member] | Automated service charge and other deposit fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	1,107		1,150
Operating Segments [Member] | Consumer [Member] | Mortgage banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	17,131		37,564
Operating Segments [Member] | Consumer [Member] | Mortgage production revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	5,055		25,287
Operating Segments [Member] | Consumer [Member] | Mortgage servicing revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	12,076		12,277
Operating Segments [Member] | Consumer [Member] | Other revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	2,655		2,340
Operating Segments [Member] | Wealth Management [Member] | Fees and commissions revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	25,023		65,684
Operating Segments [Member] | Wealth Management [Member] | Brokerage and trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	(40,558)		16,232
Operating Segments [Member] | Wealth Management [Member] | Trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	(54,048)		3,716
Operating Segments [Member] | Wealth Management [Member] | Customer hedging revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	817		91
Operating Segments [Member] | Wealth Management [Member] | Retail brokerage revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	4,610		4,741
Operating Segments [Member] | Wealth Management [Member] | Insurance brokerage revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	3,738		2,916
Operating Segments [Member] | Wealth Management [Member] | Investment banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	4,325		4,768
Operating Segments [Member] | Wealth Management [Member] | Transaction card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	59		15
Operating Segments [Member] | Wealth Management [Member] | TransFund EFT network revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	(17)		(13)
Operating Segments [Member] | Wealth Management [Member] | Merchant services revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0
Operating Segments [Member] | Wealth Management [Member] | Corporate card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	76		28
Operating Segments [Member] | Wealth Management [Member] | Fiduciary and asset management revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	46,443		41,279
Operating Segments [Member] | Wealth Management [Member] | Personal trust revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	24,797		21,977
Operating Segments [Member] | Wealth Management [Member] | Corporate trust revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	3,958		3,789
Operating Segments [Member] | Wealth Management [Member] | Institutional trust & retirement plan services revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	12,567		12,610
Operating Segments [Member] | Wealth Management [Member] | Investment management services and other revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	5,121		2,903
Operating Segments [Member] | Wealth Management [Member] | Deposit service charges and fees [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	522		623
Operating Segments [Member] | Wealth Management [Member] | Commercial account service charge revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	513		581
Operating Segments [Member] | Wealth Management [Member] | Overdraft fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	23		19
Operating Segments [Member] | Wealth Management [Member] | Check card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	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	(14)		23
Operating Segments [Member] | Wealth Management [Member] | Mortgage banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0
Operating Segments [Member] | Wealth Management [Member] | Mortgage production revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0
Operating Segments [Member] | Wealth Management [Member] | Mortgage servicing revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0
Operating Segments [Member] | Wealth Management [Member] | Other revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	18,557		7,535
Funds Management and Other [Member] | Fees and commissions revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	(18,329)		(5,679)
Funds Management and Other [Member] | Brokerage and trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	(2,858)		(1,915)
Funds Management and Other [Member] | Trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0
Funds Management and Other [Member] | Customer hedging revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	(2,858)		(1,706)
Funds Management and Other [Member] | Retail brokerage revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0
Funds Management and Other [Member] | Insurance brokerage revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0
Funds Management and Other [Member] | Investment banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		(209)
Funds Management and Other [Member] | Transaction card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	91		52
Funds Management and Other [Member] | TransFund EFT network revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	1		2
Funds Management and Other [Member] | Merchant services revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		(1)
Funds Management and Other [Member] | Corporate card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	90		51
Funds Management and Other [Member] | Fiduciary and asset management revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	(44)		43
Funds Management and Other [Member] | Personal trust revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0
Funds Management and Other [Member] | Corporate trust revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	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
Funds Management and Other [Member] | Investment management services and other revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	(44)		43
Funds Management and Other [Member] | Deposit service charges and fees [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	2		0
Funds Management and Other [Member] | Commercial account service charge revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		1
Funds Management and Other [Member] | Overdraft fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0
Funds Management and Other [Member] | Check card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0
Funds Management and Other [Member] | Automated service charge and other deposit fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	2		(1)
Funds Management and Other [Member] | Mortgage banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	(481)		(451)
Funds Management and Other [Member] | Mortgage production revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	0		0
Funds Management and Other [Member] | Mortgage servicing revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	(481)		(451)
Funds Management and Other [Member] | Other revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions	$ (15,039)		$ (3,408)
[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]	In scope revenue represents revenue subject to FASB ASC Topic 606, Revenue from Contracts with Customers.
[4]	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	Mar. 31, 2022		Dec. 31, 2021		Mar. 31, 2021	Dec. 31, 2020
Assets: [Abstract]
Trading securities	$ 4,891,096		$ 9,136,813
Available for sale securities	12,894,534		13,157,817
Fair value option securities	185,003		43,770
Mortgage servicing rights	209,563		163,198		$ 132,915	$ 101,172
Derviative contracts, net of cash collateral, Assets, Fair value	2,680,207		1,097,297
Liabilities: [Abstract]
Derivative contracts, net of cash collateral, Liabilities, Fair Value	557,834		275,625
U.S. government securities [Member]
Assets: [Abstract]
Trading securities	13,513		23,610
Residential agency mortgage-backed securities [Member]
Assets: [Abstract]
Trading securities	4,827,504		9,068,900
Available for sale securities	7,612,021		8,006,616
Fair value option securities	185,003		43,770
Municipal securities [Member]
Assets: [Abstract]
Trading securities	24,539		25,783
Available for sale securities	526,322		508,365
U.S. Treasury [Member]
Assets: [Abstract]
Available for sale securities	947		1,000
Residential non-agency mortgage-backed securities [Member]
Assets: [Abstract]
Available for sale securities	347,187		24,339
Commercial agency mortgage-backed securities [Member]
Assets: [Abstract]
Available for sale securities	4,407,585		4,617,025
Other debt securities [Member]
Assets: [Abstract]
Trading securities	25,540		18,520
Available for sale securities	472		472
Fair Value, Recurring [Member]
Assets: [Abstract]
Trading securities	4,891,096		9,136,813
Available for sale securities	12,894,534		13,157,817
Residential mortgage loans held for sale	169,474	[1]	192,295	[2]
Mortgage servicing rights	209,563	[3]	163,198	[4]
Derviative contracts, net of cash collateral, Assets, Fair value	2,680,207		1,097,297
Liabilities: [Abstract]
Derivative contracts, net of cash collateral, Liabilities, Fair Value	557,834		275,625
Fair Value, Recurring [Member] | U.S. government securities [Member]
Assets: [Abstract]
Trading securities	13,513		23,610
Fair Value, Recurring [Member] | Residential agency mortgage-backed securities [Member]
Assets: [Abstract]
Trading securities	4,827,504		9,068,900
Available for sale securities	7,612,021		8,006,616
Fair value option securities	185,003		43,770
Fair Value, Recurring [Member] | Municipal securities [Member]
Assets: [Abstract]
Trading securities	24,539		25,783
Available for sale securities	526,322		508,365
Fair Value, Recurring [Member] | U.S. Treasury [Member]
Assets: [Abstract]
Available for sale securities	947		1,000
Fair Value, Recurring [Member] | Residential non-agency mortgage-backed securities [Member]
Assets: [Abstract]
Available for sale securities	347,187		24,339
Fair Value, Recurring [Member] | Commercial agency mortgage-backed securities [Member]
Assets: [Abstract]
Available for sale securities	4,407,585		4,617,025
Fair Value, Recurring [Member] | Other debt securities [Member]
Assets: [Abstract]
Available for sale securities	472		472
Fair Value, Recurring [Member] | Other trading securities
Assets: [Abstract]
Trading securities	25,540		18,520
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets: [Abstract]
Trading securities	4,978		4,999
Available for sale securities	947		1,000
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	0		8,331
Liabilities: [Abstract]
Derivative contracts, net of cash collateral, Liabilities, Fair Value	0		0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | U.S. government securities [Member]
Assets: [Abstract]
Trading securities	4,978		4,999
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] | U.S. Treasury [Member]
Assets: [Abstract]
Available for sale securities	947		1,000
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 1 [Member] | Other trading securities
Assets: [Abstract]
Trading securities	0		0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets: [Abstract]
Trading securities	4,886,118		9,131,814
Available for sale securities	12,893,115		13,156,345
Residential mortgage loans held for sale	160,507	[1]	185,969	[2]
Mortgage servicing rights	0	[3]	0	[4]
Derviative contracts, net of cash collateral, Assets, Fair value	2,680,207		1,088,966
Liabilities: [Abstract]
Derivative contracts, net of cash collateral, Liabilities, Fair Value	557,834		275,625
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | U.S. government securities [Member]
Assets: [Abstract]
Trading securities	8,535		18,611
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Residential agency mortgage-backed securities [Member]
Assets: [Abstract]
Trading securities	4,827,504		9,068,900
Available for sale securities	7,612,021		8,006,616
Fair value option securities	185,003		43,770
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Municipal securities [Member]
Assets: [Abstract]
Trading securities	24,539		25,783
Available for sale securities	526,322		508,365
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	347,187		24,339
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Commercial agency mortgage-backed securities [Member]
Assets: [Abstract]
Available for sale securities	4,407,585		4,617,025
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 2 [Member] | Other trading securities
Assets: [Abstract]
Trading securities	25,540		18,520
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets: [Abstract]
Trading securities	0		0
Available for sale securities	472		472
Residential mortgage loans held for sale	8,967	[1]	6,326	[2]
Mortgage servicing rights	209,563	[3]	163,198	[4]
Derviative contracts, net of cash collateral, Assets, Fair value	$ 0		$ 0
Liquidity Discount on Mortgage Loans Qualifying for Sale to US Govt Agencies	95.07%		95.07%
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] | 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	472		472
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Other trading securities
Assets: [Abstract]
Trading securities	$ 0		$ 0
[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 95.07% 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 95.07% 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.
[4]	A reconciliation of the beginning and ending fair value of mortgage servicing rights and disclosures of significant assumptions used to determine fair value are presented in Note 5, Mortgage Banking Activities.

Fair Value Measurements, Fair_2

Fair Value Measurements, Fair Value Measured On a Nonrecurring Basis (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other gains (losses), net	$ (1,644)	$ 10,121
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	818	15,049
Other gains (losses), net	0	0
Fair Value, Nonrecurring [Member] | Real estate and other repossessed assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross charge-offs against allowance for loan losses	0	0
Other gains (losses), net	106	(2,200)
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
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | Real estate and other repossessed assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	0	0
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] | Nonaccruing Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	4,168	259
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	$ 1,412	$ 1,706

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	Mar. 31, 2022	Mar. 31, 2021
Discounted Cash Flow [Member] | Nonaccruing Loans [Member] | Management knowledge of Industry [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure	$ 244	$ 34,046
Discounted Cash Flow [Member] | Real estate and other repossessed assets [Member] | Management knowledge of Industry [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure		$ 300
Discounted Cash Flow [Member] | Real estate and other repossessed assets [Member] | Marketability adjustments off appraised value
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure	$ 400
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	3.00%	10.00%	[1]
Minimum [Member] | Real estate and other repossessed assets [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value Measurement, Marketability adjustments off appraised value	75.00%
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	25.00%	91.00%	[1]
Maximum [Member] | Real estate and other repossessed assets [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value Measurement, Marketability adjustments off appraised value	75.00%
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	5.00%	47.00%	[1]
Weighted Average [Member] | Real estate and other repossessed assets [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value Measurement, Marketability adjustments off appraised value	75.00%
[1]	Represents fair value as a percentage of the unpaid principal balance.

Fair Value Measurements, Financ

Fair Value Measurements, Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	$ 4,891,096	$ 9,136,813
Investment Securities, Gross Amortized Cost	184,457	210,999
Investment securities, Allowance for Credit Loss	(633)	(555)
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss	183,824	210,444
Available for sale securities	12,894,534	13,157,817
Fair value option securities	185,003	43,770
Residential mortgage loans held for sale	169,474	192,295
Loans and Leases Receivable, Gross	20,674,429	20,205,680
Allowance for loan losses	(246,473)	(256,421)
Loans, net of allowance	20,427,956	19,949,259
Mortgage servicing rights	209,563	163,198	$ 132,915	$ 101,172
Derviative contracts, net of cash collateral, Assets, Fair value	2,680,207	1,097,297
Time deposits	1,514,416	1,704,328
Subordinated debentures	131,209	131,226
Derivative contracts, net of cash collateral, Liabilities, Fair Value	557,834	275,625
Commercial [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and Leases Receivable, Gross	12,883,189	12,506,465
Allowance for loan losses	(151,448)	(162,056)
Commercial real estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and Leases Receivable, Gross	4,100,956	3,831,325
Allowance for loan losses	(58,974)	(58,553)
Paycheck Protection Program [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and Leases Receivable, Gross	137,365	276,341
Allowance for loan losses	0	0
Loans to individuals [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and Leases Receivable, Gross	3,552,919	3,591,549
Allowance for loan losses	(36,051)	(35,812)
U.S. government securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	13,513	23,610
Residential agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	4,827,504	9,068,900
Investment Securities, Gross Amortized Cost	6,486	6,939
Available for sale securities	7,612,021	8,006,616
Fair value option securities	185,003	43,770
Municipal securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	24,539	25,783
Investment Securities, Gross Amortized Cost	177,683	203,772
Available for sale securities	526,322	508,365
U.S. Treasury [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	947	1,000
Residential non-agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	347,187	24,339
Commercial agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	4,407,585	4,617,025
Other debt securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	25,540	18,520
Investment Securities, Gross Amortized Cost	288	288
Available for sale securities	472	472
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	767,805	712,067
Interest-bearing cash and cash equivalents	599,976	2,125,343
Trading securities	4,891,096	9,136,813
Investment Securities, Gross Amortized Cost	184,457	210,999
Investment securities, Allowance for Credit Loss	(633)	(555)
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss	183,824	210,444
Available for sale securities	12,894,534	13,157,817
Residential mortgage loans held for sale	169,474	192,295
Loans and Leases Receivable, Gross	20,674,429	20,205,680
Allowance for loan losses	(246,473)	(256,421)
Loans, net of allowance	20,427,956	19,949,259
Mortgage servicing rights	209,563	163,198
Derviative contracts, net of cash collateral, Assets, Fair value	2,680,207	1,097,297
Deposits with no stated maturity	37,911,535	39,537,731
Time deposits	1,514,416	1,704,328
Other borrowed funds	1,104,575	2,363,202
Subordinated debentures	131,209	131,226
Derivative contracts, net of cash collateral, Liabilities, Fair Value	557,834	275,625
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Commercial [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and Leases Receivable, Gross	12,883,189	12,506,465
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Commercial real estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and Leases Receivable, Gross	4,100,956	3,831,325
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Paycheck Protection Program [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and Leases Receivable, Gross	137,365	276,341
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Loans to individuals [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and Leases Receivable, Gross	3,552,919	3,591,549
Carrying (Reported) Amount, Fair Value Disclosure [Member] | U.S. government securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	13,513	23,610
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Residential agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	4,827,504	9,068,900
Investment Securities, Gross Amortized Cost	6,486	6,939
Available for sale securities	7,612,021	8,006,616
Fair value option securities	185,003	43,770
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Municipal securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	24,539	25,783
Investment Securities, Gross Amortized Cost	177,683	203,772
Available for sale securities	526,322	508,365
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Other trading securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	25,540	18,520
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	947	1,000
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	347,187	24,339
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Commercial agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	4,407,585	4,617,025
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Other debt securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment Securities, Gross Amortized Cost	288	288
Available for sale securities	472	472
Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	767,805	712,067
Interest-bearing cash and cash equivalents	599,976	2,125,343
Trading securities	4,891,096	9,136,813
Investment Securities, Gross Amortized Cost	191,235	231,395
Investment securities, Allowance for Credit Loss	0	0
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss	191,235	231,395
Available for sale securities	12,894,534	13,157,817
Residential mortgage loans held for sale	169,474	192,295
Loans and Leases Receivable, Gross	20,230,122	20,039,221
Allowance for loan losses	0	0
Loans, net of allowance	20,230,122	20,039,221
Mortgage servicing rights	209,563	163,198
Derviative contracts, net of cash collateral, Assets, Fair value	2,680,207	1,097,297
Deposits with no stated maturity	37,911,535	39,537,731
Time deposits	1,498,269	1,703,886
Other borrowed funds	1,102,079	2,360,746
Subordinated debentures	138,623	141,761
Derivative contracts, net of cash collateral, Liabilities, Fair Value	557,834	275,625
Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and Leases Receivable, Gross	12,639,182	12,395,664
Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial real estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and Leases Receivable, Gross	3,985,876	3,786,767
Estimate of Fair Value, Fair Value Disclosure [Member] | Paycheck Protection Program [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and Leases Receivable, Gross	134,313	269,912
Estimate of Fair Value, Fair Value Disclosure [Member] | Loans to individuals [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and Leases Receivable, Gross	3,470,751	3,586,878
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	13,513	23,610
Estimate of Fair Value, Fair Value Disclosure [Member] | Residential agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	4,827,504	9,068,900
Investment Securities, Gross Amortized Cost	6,741	7,500
Available for sale securities	7,612,021	8,006,616
Fair value option securities	185,003	43,770
Estimate of Fair Value, Fair Value Disclosure [Member] | Municipal securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	24,539	25,783
Investment Securities, Gross Amortized Cost	184,214	223,609
Available for sale securities	526,322	508,365
Estimate of Fair Value, Fair Value Disclosure [Member] | Other trading securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	25,540	18,520
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	947	1,000
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	347,187	24,339
Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	4,407,585	4,617,025
Estimate of Fair Value, Fair Value Disclosure [Member] | Other debt securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment Securities, Gross Amortized Cost	280	286
Available for sale securities	472	472
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	767,805	712,067
Interest-bearing cash and cash equivalents	599,976	2,125,343
Trading securities	4,978	4,999
Investment Securities, Gross Amortized Cost	0	0
Investment securities, Allowance for Credit Loss	0	0
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss	0	0
Available for sale securities	947	1,000
Residential mortgage loans held for sale	0	0
Loans and Leases Receivable, Gross	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	0	8,331
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	0	0
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 and Leases Receivable, Gross	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 and Leases Receivable, Gross	0	0
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Paycheck Protection Program [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and Leases Receivable, Gross	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 and Leases Receivable, Gross	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	4,978	4,999
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
Investment Securities, Gross Amortized Cost	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
Investment Securities, Gross Amortized Cost	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	947	1,000
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]
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]
Investment Securities, Gross Amortized Cost	0	0
Available for sale securities	0	0
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	0	0
Interest-bearing cash and cash equivalents	0	0
Trading securities	4,886,118	9,131,814
Investment Securities, Gross Amortized Cost	48,941	65,484
Investment securities, Allowance for Credit Loss	0	0
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss	48,941	65,484
Available for sale securities	12,893,115	13,156,345
Residential mortgage loans held for sale	160,507	185,969
Loans and Leases Receivable, Gross	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	2,680,207	1,088,966
Deposits with no stated maturity	0	0
Time deposits	0	0
Other borrowed funds	0	0
Subordinated debentures	138,623	141,761
Derivative contracts, net of cash collateral, Liabilities, Fair Value	557,834	275,625
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 and Leases Receivable, Gross	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 and Leases Receivable, Gross	0	0
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Paycheck Protection Program [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and Leases Receivable, Gross	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 and Leases Receivable, Gross	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	8,535	18,611
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Residential agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	4,827,504	9,068,900
Investment Securities, Gross Amortized Cost	6,741	7,500
Available for sale securities	7,612,021	8,006,616
Fair value option securities	185,003	43,770
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	24,539	25,783
Investment Securities, Gross Amortized Cost	41,920	57,698
Available for sale securities	526,322	508,365
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	25,540	18,520
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	347,187	24,339
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]
Available for sale securities	4,407,585	4,617,025
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]
Investment Securities, Gross Amortized Cost	280	286
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
Investment Securities, Gross Amortized Cost	142,294	165,911
Investment securities, Allowance for Credit Loss	0	0
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss	142,294	165,911
Available for sale securities	472	472
Residential mortgage loans held for sale	8,967	6,326
Loans and Leases Receivable, Gross	20,230,122	20,039,221
Allowance for loan losses	0	0
Loans, net of allowance	20,230,122	20,039,221
Mortgage servicing rights	209,563	163,198
Derviative contracts, net of cash collateral, Assets, Fair value	0	0
Deposits with no stated maturity	37,911,535	39,537,731
Time deposits	1,498,269	1,703,886
Other borrowed funds	1,102,079	2,360,746
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 and Leases Receivable, Gross	12,639,182	12,395,664
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 and Leases Receivable, Gross	3,985,876	3,786,767
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Paycheck Protection Program [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and Leases Receivable, Gross	134,313	269,912
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 and Leases Receivable, Gross	3,470,751	3,586,878
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
Investment Securities, Gross Amortized Cost	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
Investment Securities, Gross Amortized Cost	142,294	165,911
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]
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]
Investment Securities, Gross Amortized Cost	0	0
Available for sale securities	$ 472	$ 472