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Premises and Equipment and Leases | 12 Months Ended
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Dec. 31, 2023
Property, Plant and Equipment [Abstract] |
Premises and Equipment Disclosure [Text Block] | Premises and Equipment and Leases Premises and equipment at December 31 are summarized as follows (in thousands):
|  | December 31,
|  | 2023 |  | 2022
Land |  | $ | 69,121 |  |  | $ | 69,944 |
Buildings and improvements |  | 525,941 |  |  | 469,001 |
Software and related integration |  | 219,646 |  |  | 198,057 |
Furniture and equipment |  | 211,082 |  |  | 201,830 |
Construction in progress |  | 68,412 |  |  | 35,736 |
Premises and equipment |  | 1,094,202 |  |  | 974,568 |
Less: Accumulated depreciation |  | 471,979 |  |  | 409,393 |
Premises and equipment, net of accumulated depreciation |  | $ | 622,223 |  |  | $ | 565,175 |
Depreciation expense of premises and equipment was $68.7 million, $68.4 million and $63.4 million for the years ended December 31, 2023, 2022 and 2021, respectively. Premises and equipment include right-of-use assets for leased office space and facilities. Leases are at market rates at inception and may contain escalations based on consumer price index or similar benchmarks and options to renew at then market rates. Right-of-use assets of $221 million at December 31, 2023 and $177 million at December 31, 2022 are included in buildings and improvements, and related right-of-use liabilities are included in other liabilities. At December 31, 2023, the weighted-average remaining lease term was 9.4 years and the weighted average discount rate on operating leases was 3.1%. At December 31, 2023, undiscounted operating lease liabilities are scheduled to mature as follows (in thousands):
2024 |  | $ | 34,000 |
2025 |  | 33,351 |
2026 |  | 32,844 |
2027 |  | 30,416 |
2028 |  | 28,930 |
Thereafter |  | 182,273 |
Total undiscounted lease payments |  | 341,814 |
Less: Interest |  | 85,512 |
Lease liabilities |  | $ | 256,302 |
Total lease expense for BOK Financial was $42.2 million in 2023, $41.7 million in 2022 and $35.8 million in 2021. Rent expense and right-of-use asset amortization recognized as occupancy and equipment expense was $25.3 million in 2023, $24.5 million in 2022 and $23.4 million in 2021. Operating cash flows from operating leases were $26.8 million, $23.3 million and $25.3 million for the years ended December 31, 2023, 2022 and 2021, respectively. Operating expenses related to leased assets and short-term lease costs totaled $15.6 million, $13.0 million and $11.5 million for the years ended December 31, 2023, 2022 and 2021, respectively. BOKF, NA is obligated under a long-term lease for its bank premises in downtown Tulsa. The original lease dated November 1, 1976 was renegotiated on July 1, 2019. The new lease will terminate on December 31, 2034. The Company has the option to renew for an additional 10 years. Premises leases may include options to renew at then current market rates and may include escalation provisions based upon changes in consumer price index or similar benchmarks. The Company may lease owned properties or sublease unoccupied leased facilities. Income on these leases is immaterial.

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- Definition The entire disclosure for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 360 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//360/tableOfContent Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 6 -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480321/958-360-50-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480321/958-360-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 7 -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480321/958-360-50-7 + Details
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