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Parent Company Only Financial Statements Parent Company Only Financial Statements, Condensed Income Statements (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Condensed Income Statements, Captions [Line Items] |  |  |
Interest expense | $ 180,722 | $ 61,896 | $ 160,556
Other operating expense | 1,164,480 | 1,177,708 | 1,164,308
Other gains (losses), net | 123 | 63,742 | 6,046
Federal and state income taxes | 139,864 | 179,775 | 128,793
Net income attributable to BOK Financial Corp. shareholders | 520,273 | 618,121 | 435,030
Parent Company [Member] |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |
Total revenue | 273,142 | 492,665 | 205,097
Interest expense | 6,490 | 10,535 | 13,944
Other operating expense | 3,005 | 2,914 | 2,697
Total expense | 9,495 | 13,449 | 16,641
Net income before taxes, other losses, net, and equity in undistributed income of subsidiaries | 263,647 | 479,216 | 188,456
Other gains (losses), net | (4,279) | (3,415) | 1,465
Net income before taxes and equity in undistributed income of subsidiaries | 259,368 | 475,801 | 189,921
Federal and state income taxes | (1,776) | (4,202) | (4,502)
Net income before equity in undistributed income of subsidiaries | 261,144 | 480,003 | 194,423
Equity in undistributed income of bank subsidiaries | 300,330 | 126,380 | 276,217
Equity in undistributed income of non-bank subsidiaries | (41,201) | 11,738 | (35,610)
Net income attributable to BOK Financial Corp. shareholders | 520,273 | 618,121 | 435,030
Parent Company [Member] | Dividends, interest and fees received from bank susidiaries [Member] |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |
Total revenue | 228,689 | 483,868 | 179,140
Parent Company [Member] | Dividends, interest and fees received from non-bank subsidiaries [Member] |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |
Total revenue | 43,281 | 8,030 | 25,050
Parent Company [Member] | Other revenue [Member] |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |
Total revenue | $ 1,172 | $ 767 | $ 907

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