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Consolidated Statements of Earnings (Unaudited) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Interest revenue [Abstract] |  |
Loans | $ 243,218 | $ 279,872
Residential mortgage loans held for sale | 1,123 | 1,663
Trading securities | 11,760 | 18,695
Investment securities | 3,121 | 4,034
Available for sale securities | 69,720 | 56,831
Fair value option securities | 11,708 | 5,237
Restricted equity securities | 5,894 | 6,345
Interest-bearing cash and cash equivalents | 2,393 | 3,397
Total interest revenue | 348,937 | 376,074
Interest expense [Abstract] |  |
Deposits | 46,159 | 37,417
Borrowed funds | 37,785 | 56,810
Subordinated debentures | 3,633 | 3,745
Total interest expense | 87,577 | 97,972
Net interest revenue | 261,360 | 278,102
Provision for credit losses | 93,771 | 8,000
Net interest revenue after provision for credit losses | 167,589 | 270,102
Total fees and commissions | 192,724 | 160,552
Other gains (losses), net | (10,741) | 2,976
Gain on derivatives, net | 18,420 | 4,667
Gain on fair value option securities, net | 68,393 | 9,665
Change in fair value of mortgage servicing rights | (88,480) | (20,666)
Gain on available for sale securities, net | 3 | 76
Total other operating revenue | 180,319 | 157,270
Other operating expense [Abstract] |  |
Personnel | 156,181 | 169,228
Business promotion | 6,215 | 7,874
Professional fees and services | 12,948 | 16,139
Net occupancy and equipment | 26,061 | 29,521
Insurance | 4,980 | 4,839
Data processing and communications | 32,743 | 31,449
Printing, postage and supplies | 4,272 | 4,885
Net losses and operating expenses of repossessed assets | 1,531 | 1,996
Amortization of intangible assets | 5,094 | 5,191
Mortgage banking costs | 10,545 | 9,906
Other expense | 8,054 | 6,129
Total other operating expense | 268,624 | 287,157
Net income before taxes | 79,284 | 140,215
Federal and state income taxes | 17,300 | 29,950
Net income | 61,984 | 110,265
Net income (loss) attributable to non-controlling interests | (95) | (347)
Net income attributable to BOK Financial Corporation shareholders | $ 62,079 | $ 110,612
Earnings per share: [Abstract] |  |
Basic | $ 0.88 | $ 1.54
Diluted | $ 0.88 | $ 1.54
Average shares used in computation: [Abstract] |  |
Basic | 70,123,685 | 71,387,070
Diluted | 70,130,166 | 71,404,388
Dividends declared per share | $ 0.51 | $ 0.50
Brokerage and trading revenue [Member] |  |
Total fees and commissions | $ 50,779 | $ 31,617
Transaction card revenue [Member] |  |
Total fees and commissions | 21,881 | 20,738
Fiduciary and asset management revenue [Member] |  |
Total fees and commissions | 44,458 | 43,358
Deposit service charges and fees [Member] |  |
Total fees and commissions | 26,130 | 28,243
Mortgage banking revenue [Member] |  |
Total fees and commissions | 37,167 | 23,834
Other revenue [Member] |  |
Total fees and commissions | $ 12,309 | $ 12,762

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