Other Borrowed Funds (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Other Borrowed Funds [Line Items]
Balance		$ 4,454,179	$ 8,955,450	$ 7,138,490
Average Balance		$ 7,635,810	$ 8,763,904	$ 3,025,223
Rate		5.24%	5.06%	1.95%
Other borrowed funds, Maturities [Abstract]
2025		$ 4,214,262
2026		103,288
2027		1,807
2028		0
2029		0
Thereafter		134,822
Funds purchased [Member]
Other Borrowed Funds [Line Items]
Balance		$ 615,809	$ 515,747	$ 99,843
Rate		4.21%	5.17%	0.05%
Average Balance		$ 613,294	$ 847,676	$ 266,344
Rate		4.66%	4.83%	1.12%
Maximum Outstanding At Any Month End		$ 899,447	$ 1,711,580	$ 444,069
Repurchase agreements [Member]
Other Borrowed Funds [Line Items]
Balance		$ 677,047	$ 607,001	$ 2,170,534
Rate		1.45%	1.70%	4.42%
Average Balance		$ 682,699	$ 1,805,978	$ 998,701
Rate		3.49%	4.32%	1.02%
Maximum Outstanding At Any Month End		$ 1,627,169	$ 4,433,480	$ 3,034,312
Other Borrowings [Member]
Other Borrowed Funds [Line Items]
Balance		3,030,123	7,701,552	4,736,908
Average Balance		$ 6,208,654	$ 5,979,095	$ 1,628,972
Rate		5.45%	5.28%	2.41%
Federal Home Loan Bank advances [Member]
Other Borrowed Funds [Line Items]
Balance		$ 3,000,000	$ 7,675,000	$ 4,700,000
Rate		4.58%	5.51%	4.48%
Average Balance		$ 6,181,011	$ 5,948,863	$ 1,593,699
Rate		5.45%	5.28%	2.37%
Maximum Outstanding At Any Month End		$ 6,700,000	$ 7,875,000	$ 4,700,000
GNMA repurchase liability [Member]
Other Borrowed Funds [Line Items]
Balance		$ 17,628	$ 11,660	$ 10,608
Rate		3.83%	4.13%	4.06%
Average Balance		$ 13,914	$ 11,224	$ 6,692
Rate		4.17%	4.04%	4.38%
Maximum Outstanding At Any Month End		$ 17,628	$ 12,414	$ 11,011
Other [Member]
Other Borrowed Funds [Line Items]
Balance		$ 12,495	$ 14,892	$ 26,300
Rate		4.78%	5.50%	3.20%
Average Balance		$ 13,729	$ 19,008	$ 28,581
Rate		6.04%	3.91%	3.12%
Maximum Outstanding At Any Month End		$ 14,800	$ 26,311	$ 30,382
Subordinated debentures [Member]
Other Borrowed Funds [Line Items]
Balance	[1]	$ 131,200	$ 131,150	$ 131,205
Rate	[1]	6.43%	6.93%	6.34%
Average Balance	[1]	$ 131,163	$ 131,155	$ 131,206
Rate	[1]	7.03%	6.83%	4.95%
Maximum Outstanding At Any Month End	[1]	$ 131,200	$ 131,164	$ 131,230
Subordinated debentures [Member] | Subordinated debentures-acquired, 2015 Issuance [Member]
Other borrowed funds, Other Disclosures [Abstract]
Amount of debt issuance		$ 60,000
Maturity date		Jun. 25, 2030
Stated interest rate		5.625%
Interest rate description		three-month SOFR plus 0.26% tenor spread adjustment plus 3.17%
Debt Instrument, Call Date, Earliest		Jun. 25, 2025
Subordinated debentures [Member] | Junior subordinated debentures-acquired, 2003 issuance [Member]
Other borrowed funds, Other Disclosures [Abstract]
Amount of debt issuance		$ 21,000
Maturity date		Sep. 17, 2033
Interest rate description		three-month SOFR plus 0.26% tenor spread adjustment plus 2.95%
Subordinated debentures [Member] | Junior subordinated debentures-acquired, 2004 issuance [Member]
Other borrowed funds, Other Disclosures [Abstract]
Amount of debt issuance		$ 31,000
Maturity date		Jul. 23, 2034
Interest rate description		three-month SOFR plus 0.26% tenor spread adjustment plus 2.60%
Subordinated debentures [Member] | Junior subordinated debentures-acquired, 2005 issuance [Member]
Other borrowed funds, Other Disclosures [Abstract]
Amount of debt issuance		$ 20,000
Maturity date		Sep. 30, 2035
Interest rate description		three-month SOFR plus 0.26% tenor spread adjustment plus 1.45%
Subsidiaries [Member] | Funds purchased [Member]
Other borrowed funds, Other Disclosures [Abstract]
Number of days to maturity, minimum		1 day
Number of days to maturity, maximum		90 days
Subsidiaries [Member] | Repurchase agreements [Member]
Other borrowed funds, Other Disclosures [Abstract]
Number of days to maturity, maximum		90 days
Subsidiaries [Member] | Federal Home Loan Bank advances [Member]
Other borrowed funds, Other Disclosures [Abstract]
Federal Home Loan Banks, Letters of credit issued to secure public funds		$ 604,000
Unused credit available pursuant to the FHLB's collateral policies		4,300,000
Subsidiaries [Member] | BOK Financial Securities, Inc. [Member] | Other [Member]
Other Borrowed Funds [Line Items]
Balance		$ 0	$ 0

[1] Parent Company only.