XML 69 R58.htm IDEA: XBRL DOCUMENT
v3.24.2

Loans - Non-Accrual Loans, Segregated by Class of Loans (Detail) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Non Accrual Loans Segregated By Class Of Loans [Line Items] |  |
Non-accrual loans | $ 74,987 | $ 60,907
Non-accrual with no credit loss allowance | 32,376 | 22,932
Commercial Portfolio Segment [Member] |  |
Non Accrual Loans Segregated By Class Of Loans [Line Items] |  |
Non-accrual loans | 26,329 | 19,545
Non-accrual with no credit loss allowance | 8,044 | 5,391
Commercial and Industrial Total Energy Loans [Member] |  |
Non Accrual Loans Segregated By Class Of Loans [Line Items] |  |
Non-accrual loans | 9,147 | 11,500
Non-accrual with no credit loss allowance | 6,045 | 7,398
Commercial Real Estate Buildings Land And Other Loans [Member] |  |
Non Accrual Loans Segregated By Class Of Loans [Line Items] |  |
Non-accrual loans | 33,092 | 22,420
Non-accrual with no credit loss allowance | 14,099 | 4,983
Construction Loans [Member] |  |
Non Accrual Loans Segregated By Class Of Loans [Line Items] |  |
Non-accrual loans | 0 | 0
Non-accrual with no credit loss allowance | 0 | 0
Total consumer real estate loans [Member] |  |
Non Accrual Loans Segregated By Class Of Loans [Line Items] |  |
Non-accrual loans | 6,419 | 7,442
Non-accrual with no credit loss allowance | 4,188 | 5,160
Consumer Loan [Member] |  |
Non Accrual Loans Segregated By Class Of Loans [Line Items] |  |
Non-accrual loans | 0 | 0
Non-accrual with no credit loss allowance | $ 0 | $ 0

X
- Definition Non Accrual Loans Segregated By Class Of Loans [Line Items] + References No definition available. + Details
Name: | cfr_NonAccrualLoansSegregatedByClassOfLoansLineItems
Namespace Prefix: | cfr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amortized cost of financing receivable on nonaccrual status with no allowance for credit loss. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 16 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-16 + Details
Name: | us-gaap_FinancingReceivableNonaccrualNoAllowance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Reflects the carrying amount of loans deemed to be questionable as to collection on which no interest is continuing to be recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-7 + Details
Name: | us-gaap_LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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

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

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

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

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