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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, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Condensed Income Statements, Captions [Line Items] |  |  |
Interest expense | $ 1,070,284 | $ 180,722 | $ 61,896
Other operating expense | 1,332,881 | 1,164,480 | 1,177,708
Other gains (losses), net | 56,795 | 123 | 63,742
Federal and state income taxes | 152,115 | 139,864 | 179,775
Net income attributable to BOK Financial Corp. shareholders | 530,746 | 520,273 | 618,121
Parent Company [Member] |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |
Total revenue | 338,591 | 273,142 | 492,665
Interest expense | 8,952 | 6,490 | 10,535
Other operating expense | 5,674 | 3,005 | 2,914
Total expense | 14,626 | 9,495 | 13,449
Net income before taxes, other losses, net, and equity in undistributed income of subsidiaries | 323,965 | 263,647 | 479,216
Other gains (losses), net | 32,656 | (4,279) | (3,415)
Net income before taxes and equity in undistributed income of subsidiaries | 356,621 | 259,368 | 475,801
Federal and state income taxes | 5,410 | (1,776) | (4,202)
Net income before equity in undistributed income of subsidiaries | 351,211 | 261,144 | 480,003
Equity in undistributed income of bank subsidiaries | 181,487 | 300,330 | 126,380
Equity in undistributed income of non-bank subsidiaries | (1,952) | (41,201) | 11,738
Net income attributable to BOK Financial Corp. shareholders | 530,746 | 520,273 | 618,121
Parent Company [Member] | Dividends, interest and fees received from bank susidiaries [Member] |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |
Total revenue | 329,429 | 228,689 | 483,868
Parent Company [Member] | Dividends, interest and fees received from non-bank subsidiaries [Member] |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |
Total revenue | 8,000 | 43,281 | 8,030
Parent Company [Member] | Other revenue [Member] |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |
Total revenue | $ 1,162 | $ 1,172 | $ 767

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