XML 52 R41.htm IDEA: XBRL DOCUMENT
v3.21.2

Loans and Allowance for Credit Losses - Summary of Amortized Cost Balance of Financial Assets (Detail) - USD ($) $ in Thousands | Sep. 30, 2021 | Jun. 30, 2021 | Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Dec. 31, 2019
--- | --- | --- | --- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets | $ 16,469,463 |  | $ 16,103,651 |  |  |
Related Allowance for Credit Losses | 196,272 | $ 203,399 | 218,583 | $ 214,494 | $ 203,605 | $ 101,788
Collateral Dependent Assets [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets | 96,309 |  | 87,731 |  |  |
Related Allowance for Credit Losses | 3,613 |  | 10,127 |  |  |
Amortized Cost of Collateral Dependent Assets with no related Allowance | 91,624 |  | 41,609 |  |  |
Commercial and Industrial Portfolio [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets | 6,856,243 |  | 7,062,074 |  |  |
Related Allowance for Credit Losses | 105,135 | 118,121 | 122,700 | 119,859 | 114,610 | 63,313
Commercial and Industrial Portfolio [Member] | Collateral Dependent Assets [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets | 83,445 |  | 33,770 |  |  |
Related Allowance for Credit Losses | 3,474 |  | 4,828 |  |  |
Amortized Cost of Collateral Dependent Assets with no related Allowance | 79,971 |  | 9,916 |  |  |
Commercial and Industrial Portfolio [Member] | Equipment/Accounts Receivable/Inventory [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets | 6,710,089 |  | 6,884,168 |  |  |
Commercial and Industrial Portfolio [Member] | Equipment/Accounts Receivable/Inventory [Member] | Collateral Dependent Assets [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets | 83,445 |  | 29,684 |  |  |
Related Allowance for Credit Losses | 3,474 |  | 4,828 |  |  |
Amortized Cost of Collateral Dependent Assets with no related Allowance | 79,971 |  | 5,830 |  |  |
Commercial and Industrial Portfolio [Member] | Agriculture [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets | 141,138 |  | 161,581 |  |  |
Commercial and Industrial Portfolio [Member] | Agriculture [Member] | Collateral Dependent Assets [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets |  |  | 4,086 |  |  |
Amortized Cost of Collateral Dependent Assets with no related Allowance |  |  | 4,086 |  |  |
Specialty Lending Portfolio [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets | 508,431 |  | 511,300 |  |  |
Related Allowance for Credit Losses | 6,720 | 5,901 | 5,219 | 3,583 | 929 | 2,545
Specialty Lending Portfolio [Member] | Collateral Dependent Assets [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets | 1,211 |  | 19,436 |  |  |
Related Allowance for Credit Losses | 139 |  | 4,663 |  |  |
Amortized Cost of Collateral Dependent Assets with no related Allowance |  |  | 242 |  |  |
Specialty Lending Portfolio [Member] | Asset-based Lending [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets | 393,736 |  | 355,349 |  |  |
Specialty Lending Portfolio [Member] | Asset-based Lending [Member] | Collateral Dependent Assets [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets |  |  | 17,875 |  |  |
Related Allowance for Credit Losses |  |  | 4,490 |  |  |
Amortized Cost of Collateral Dependent Assets with no related Allowance |  |  | 242 |  |  |
Specialty Lending Portfolio [Member] | Factoring [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets | 114,695 |  | 155,951 |  |  |
Specialty Lending Portfolio [Member] | Factoring [Member] | Collateral Dependent Assets [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets | 1,211 |  | 1,561 |  |  |
Related Allowance for Credit Losses | 139 |  | 173 |  |  |
Commercial Real Estate Portfolio [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets | 6,155,508 |  | 5,908,934 |  |  |
Related Allowance for Credit Losses | 67,533 | 56,734 | 61,931 | 59,034 | 55,834 | 15,951
Commercial Real Estate Portfolio [Member] | Collateral Dependent Assets [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets | 6,879 |  | 28,587 |  |  |
Related Allowance for Credit Losses |  |  | 582 |  |  |
Amortized Cost of Collateral Dependent Assets with no related Allowance | 6,879 |  | 25,934 |  |  |
Commercial Real Estate Portfolio [Member] | Owner-occupied [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets | 1,830,355 |  | 1,685,185 |  |  |
Commercial Real Estate Portfolio [Member] | Owner-occupied [Member] | Collateral Dependent Assets [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets | 4,669 |  | 16,539 |  |  |
Amortized Cost of Collateral Dependent Assets with no related Allowance | 4,669 |  | 16,539 |  |  |
Commercial Real Estate Portfolio [Member] | Non-owner-occupied [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets | 2,761,902 |  | 2,472,535 |  |  |
Commercial Real Estate Portfolio [Member] | Farmland [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets | 483,781 |  | 502,463 |  |  |
Commercial Real Estate Portfolio [Member] | Farmland [Member] | Collateral Dependent Assets [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets | 510 |  | 8,625 |  |  |
Amortized Cost of Collateral Dependent Assets with no related Allowance | 510 |  | 8,625 |  |  |
Commercial Real Estate Portfolio [Member] | 5+ Multi-family [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets | 245,057 |  | 449,855 |  |  |
Commercial Real Estate Portfolio [Member] | 1-4 Family Construction [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets | 63,610 |  | 30,275 |  |  |
Commercial Real Estate Portfolio [Member] | General Construction [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets | 770,803 |  | 768,621 |  |  |
Commercial Real Estate Portfolio [Member] | General Construction [Member] | Collateral Dependent Assets [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets | 1,700 |  | 3,423 |  |  |
Related Allowance for Credit Losses |  |  | 582 |  |  |
Amortized Cost of Collateral Dependent Assets with no related Allowance | 1,700 |  | 770 |  |  |
Consumer Real Estate Portfolio [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets | 2,245,699 |  | 1,945,494 |  |  |
Related Allowance for Credit Losses | 6,183 | 5,807 | 6,586 | 7,605 | 5,952 | 2,623
Consumer Real Estate Portfolio [Member] | Collateral Dependent Assets [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets | 4,712 |  | 5,850 |  |  |
Related Allowance for Credit Losses |  |  | 54 |  |  |
Amortized Cost of Collateral Dependent Assets with no related Allowance | 4,712 |  | 5,429 |  |  |
Consumer Real Estate Portfolio [Member] | HELOC [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets | 343,848 |  | 395,169 |  |  |
Consumer Real Estate Portfolio [Member] | HELOC [Member] | Collateral Dependent Assets [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets | 2,710 |  | 3,170 |  |  |
Amortized Cost of Collateral Dependent Assets with no related Allowance | 2,710 |  | 3,170 |  |  |
Consumer Real Estate Portfolio [Member] | First Lien: 1-4 Family [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets | 1,881,704 |  | 1,528,494 |  |  |
Consumer Real Estate Portfolio [Member] | First Lien: 1-4 Family [Member] | Collateral Dependent Assets [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets | 1,842 |  | 2,468 |  |  |
Related Allowance for Credit Losses |  |  | 54 |  |  |
Amortized Cost of Collateral Dependent Assets with no related Allowance | 1,842 |  | 2,047 |  |  |
Consumer Real Estate Portfolio [Member] | Junior Lien: 1-4 Family [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets | 20,147 |  | 21,831 |  |  |
Consumer Real Estate Portfolio [Member] | Junior Lien: 1-4 Family [Member] | Collateral Dependent Assets [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets | 160 |  | 212 |  |  |
Amortized Cost of Collateral Dependent Assets with no related Allowance | 160 |  | 212 |  |  |
Consumer Portfolio [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets | 115,505 |  | 117,986 |  |  |
Related Allowance for Credit Losses | 1,014 | 857 | 1,480 | 2,412 | 1,606 | 543
Consumer Portfolio [Member] | Collateral Dependent Assets [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets | 62 |  | 88 |  |  |
Amortized Cost of Collateral Dependent Assets with no related Allowance | 62 |  | 88 |  |  |
Consumer Portfolio [Member] | Revolving Line [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets | 70,753 |  | 65,215 |  |  |
Consumer Portfolio [Member] | Auto [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets | 27,150 |  | 27,949 |  |  |
Consumer Portfolio [Member] | Auto [Member] | Collateral Dependent Assets [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets | 42 |  | 69 |  |  |
Amortized Cost of Collateral Dependent Assets with no related Allowance | 42 |  | 69 |  |  |
Consumer Portfolio [Member] | Other [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets | 17,602 |  | 24,822 |  |  |
Consumer Portfolio [Member] | Other [Member] | Collateral Dependent Assets [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets | 20 |  | 19 |  |  |
Amortized Cost of Collateral Dependent Assets with no related Allowance | 20 |  | 19 |  |  |
Leases and Other Portfolio [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets | 194,984 |  | 190,895 |  |  |
Related Allowance for Credit Losses | 1,249 | $ 1,400 | 2,271 | $ 1,878 | $ 1,784 | $ 1,074
Leases and Other Portfolio [Member] | Leases [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets | 2,195 |  | 2,413 |  |  |
Leases and Other Portfolio [Member] | Other [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amortized Cost of Collateral Dependent Assets | $ 192,789 |  | $ 188,482 |  |  |

X
- Definition Financing receivable with no related allowance for credit losses. + References No definition available. + Details
Name: | umbf_FinancingReceivableWithNoRelatedAllowanceForCreditLosses
Namespace Prefix: | umbf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_AccountsNotesAndLoansReceivableLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(7)(2)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (3) Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (c) Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (1) + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLosses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount, before allowance for credit loss, of financing receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953401-111524 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=124267575&loc=SL82922352-210448 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919253-210447 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919230-210447 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 80 -URI http://asc.fasb.org/extlink&oid=124267575&loc=SL82922355-210448 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (1) Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (2) Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1404 -Paragraph (a) + Details
Name: | us-gaap_NotesReceivableGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_CollateralAxis=us-gaap_CollateralPledgedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=umbf_CommercialAndIndustrialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=umbf_EquipmentAccountsReceivableInventoryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=umbf_AgricultureLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=umbf_SpecialityLendingPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=umbf_AssetBasedLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=umbf_FactoringLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=umbf_CommercialRealEstateOwnerOccupiedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=umbf_CommercialRealEstateNonOwnerOccupiedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=umbf_CommercialRealEstateFarmlandMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=umbf_CommercialRealEstateFivePlusMultiFamilyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=umbf_CommercialRealEstateOneToFourMultiFamilyConstructionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=umbf_CommercialRealEstateGeneralConstructionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=umbf_ConsumerRealEstatePortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=umbf_RealEstateHelocMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=umbf_RealEstateFirstLienOneToFourFamilyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=umbf_RealEstateJuniorLienOneToFourFamilyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=umbf_ConsumerOtherRevolvingLineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=umbf_ConsumerOtherAutoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=umbf_ConsumerOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=umbf_LeasesAndOtherPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=umbf_OtherFinancingLeasesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=umbf_OtherFinancingReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |