XML 57 R43.htm IDEA: XBRL DOCUMENT
v3.22.4

Shareholders' Equity (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2022
Stockholders' Equity Note [Abstract] |
Summary of Regulatory Capital Levels [Table Text Block] | A summary of regulatory capital minimum requirements and levels follows (dollars in thousands):
|  | Minimum Capital Requirement |  | Capital Conservation Buffer |  | Minimum Capital Requirement Including Capital Conservation Buffer |  | Well Capitalized Bank Requirement |  | December 31, 2022 |  | December 31, 2021
Common Equity Tier 1 Capital (to Risk Weighted Assets): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated |  | 4.50% |  | 2.50% |  | 7.00% |  | N/A |  | $ | 4,460,054 |  |  | 11.69 | % |  | $ | 4,230,626 |  |  | 12.24 | %
BOKF, NA |  | 4.50% |  | N/A |  | 4.50% |  | 6.50% |  | 4,176,978 |  |  | 11.05 | % |  | 3,869,454 |  |  | 11.27 | %
Tier I Capital (to Risk Weighted Assets): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated |  | 6.00% |  | 2.50% |  | 8.50% |  | N/A |  | $ | 4,464,763 |  |  | 11.71 | % |  | $ | 4,235,265 |  |  | 12.25 | %
BOKF, NA |  | 6.00% |  | N/A |  | 6.00% |  | 8.00% |  | 4,178,531 |  |  | 11.06 | % |  | 3,871,457 |  |  | 11.28 | %
Total Capital (to Risk Weighted Assets): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated |  | 8.00% |  | 2.50% |  | 10.50% |  | N/A |  | $ | 4,830,826 |  |  | 12.67 | % |  | $ | 4,594,787 |  |  | 13.29 | %
BOKF, NA |  | 8.00% |  | N/A |  | 8.00% |  | 10.00% |  | 4,478,559 |  |  | 11.85 | % |  | 4,164,940 |  |  | 12.13 | %
Leverage (Tier I Capital to Average Assets): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated |  | 4.00% |  | N/A |  | 4.00% |  | N/A |  | $ | 4,464,763 |  |  | 9.91 | % |  | $ | 4,235,265 |  |  | 8.55 | %
BOKF, NA |  | 4.00% |  | N/A |  | 4.00% |  | 5.00% |  | 4,178,531 |  |  | 9.31 | % |  | 3,871,457 |  |  | 7.84 | %
Accumulated Other Comprehensive Income (Loss) [Table Text Block] | A rollforward of the components of accumulated other comprehensive income (loss) is included as follows (in thousands):
| Unrealized Gain (Loss) on |  |  |  |
| Available for Sale Securities |  | Investment Securities Transferred from AFS |  | Employee Benefit Plans |  |  |  | Total
Balance, December 31, 2019 | $ | 104,996 |  |  | $ | — |  |  | $ | (73) |  |  |  |  | $ | 104,923 |
Net change in unrealized gain (loss) | 312,576 |  |  | — |  |  | 1,220 |  |  |  |  | 313,796 |
Reclassification adjustments included in earnings: |  |  |  |  |  |  |  |  |
Gain on available for sale securities, net | (9,910) |  |  | — |  |  | — |  |  |  |  | (9,910) |
Other comprehensive income (loss), before income taxes | 302,666 |  |  | — |  |  | 1,220 |  |  |  |  | 303,886 |
Federal and state income tax | 72,630 |  |  | — |  |  | 311 |  |  |  |  | 72,941 |
Other comprehensive income (loss), net of income taxes | 230,036 |  |  | — |  |  | 909 |  |  |  |  | 230,945 |
Balance, December 31, 2020 | 335,032 |  |  | — |  |  | 836 |  |  |  |  | 335,868 |
Net change in unrealized gain (loss) | (343,730) |  |  | — |  |  | 2,361 |  |  |  |  | (341,369) |
Reclassification adjustments included in earnings: |  |  |  |  |  |  |  |  |
Gain on available for sale securities, net | (3,704) |  |  | — |  |  | — |  |  |  |  | (3,704) |
Other comprehensive income (loss), before income taxes | (347,434) |  |  | — |  |  | 2,361 |  |  |  |  | (345,073) |
Federal and state income tax | (82,177) |  |  | — |  |  | 601 |  |  |  |  | (81,576) |
Other comprehensive income (loss), net of income taxes | (265,257) |  |  | — |  |  | 1,760 |  |  |  |  | (263,497) |
Balance, December 31, 2021 | 69,775 |  |  | — |  |  | 2,596 |  |  |  |  | 72,371 |
Net change in unrealized gain (loss) | (1,227,414) |  |  | — |  |  | — |  |  |  |  | (1,227,414) |
Transfer of net unrealized loss from AFS to investment securities | 267,509 |  |  | (267,509) |  |  | — |  |  |  |  | — |
Reclassification adjustments included in earnings: |  |  |  |  |  |  |  |  |
Interest revenue, Investment securities | — |  |  | 42,514 |  |  | — |  |  |  |  | 42,514 |
Operating expense, Personnel | — |  |  | — |  |  | (3,483) |  |  |  |  | (3,483) |
Loss on available for sale securities, net | 971 |  |  | — |  |  | — |  |  |  |  | 971 |
Other comprehensive income (loss), before income taxes | (958,934) |  |  | (224,995) |  |  | (3,483) |  |  |  |  | (1,187,412) |
Federal and state income tax | (224,541) |  |  | (52,658) |  |  | (887) |  |  |  |  | (278,086) |
Other comprehensive income (loss), net of income taxes | (734,393) |  |  | (172,337) |  |  | (2,596) |  |  |  |  | (909,326) |
Balance, December 31, 2022 | $ | (664,618) |  |  | $ | (172,337) |  |  | $ | — |  |  |  |  | $ | (836,955) |

X
- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI https://asc.fasb.org/extlink&oid=126968391&loc=SL7669686-108580 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 20 -URI https://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900 + Details
Name: | us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the capital amounts and ratios as of the balance sheet date, indicating whether the entity or entities are in compliance with regulatory capital requirements, by entity. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958570-112826 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_StockholdersEquityNoteAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration