Consolidated Statements of Earnings (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Interest revenue [Abstract]
Loans	$ 438,677	$ 367,870
Residential mortgage loans held for sale	923	979
Trading securities	68,237	34,009
Investment securities	7,829	8,928
Available for sale securities	113,488	88,736
Fair value option securities	195	3,893
Restricted equity securities	8,858	5,808
Interest-bearing cash and cash equivalents	7,005	6,506
Total interest revenue	645,212	516,729
Interest expense [Abstract]
Deposits	242,124	95,274
Borrowed funds	107,204	67,038
Subordinated debentures	2,312	2,069
Total interest expense	351,640	164,381
Net interest revenue	293,572	352,348
Provision for credit losses	8,000	16,000
Net interest revenue after provision for credit losses	285,572	336,348
Total fees and commissions	200,564	185,979
Other gains, net	4,269	2,251
Loss on derivatives, net	(8,633)	(1,344)
Loss on fair value option securities, net	(305)	(2,962)
Change in fair value of mortgage servicing rights	10,977	(6,059)
Loss on available for sale securities, net	(45,171)	0
Total other operating revenue	161,701	177,865
Noninterest Expense [Abstract]
Personnel	202,653	182,145
Business promotion	7,978	8,569
Professional fees and services	12,010	13,048
Net occupancy and equipment	30,293	28,459
FDIC and other insurance	8,740	7,315
FDIC special assessment	6,454	0
Data processing and communications	45,564	44,802
Printing, postage and supplies	3,997	3,893
Amortization of intangible assets	3,003	3,391
Mortgage banking costs	6,355	5,782
Other expense	13,337	8,408
Total other operating expense	340,384	305,812
Net income before taxes	106,889	208,401
Federal and state income taxes	23,195	45,905
Net income	83,694	162,496
Net income (loss) attributable to non-controlling interests	(9)	128
Net income attributable to BOK Financial Corporation shareholders	$ 83,703	$ 162,368
Earnings Per Share [Abstract]
Basic	$ 1.29	$ 2.43
Diluted	$ 1.29	$ 2.43
Average shares used in computation: [Abstract]
Basic	64,290,105	66,331,775
Diluted	64,290,105	66,331,775
Dividends declared per share	$ 0.55	$ 0.54
Brokerage and trading revenue [Member]
Total fees and commissions	$ 59,179	$ 52,396
Transaction card revenue [Member]
Total fees and commissions	25,493	25,621
Fiduciary and asset management revenue [Member]
Total fees and commissions	55,305	50,657
Deposit service charges and fees [Member]
Total fees and commissions	28,685	25,968
Mortgage banking revenue [Member]
Total fees and commissions	18,967	14,367
Other revenue [Member]
Total fees and commissions	$ 12,935	$ 16,970