XML 77 R67.htm IDEA: XBRL DOCUMENT
v3.23.2

Loans Loans - Allowance for Credit Loss By Loan Class Calculated in Accordance With CECL Methodology (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Mar. 31, 2023 | Dec. 31, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | --- | --- | --- | --- | ---
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss | $ 233,619 |  | $ 227,621 |  |  |
Commercial Portfolio Segment [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss | 75,166 | $ 78,465 | 104,237 | $ 87,270 | $ 87,026 | $ 72,091
Commercial and Industrial Total Energy Loans [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss | 14,929 | 19,191 | 18,062 | 16,267 | 15,422 | 17,217
Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss | 120,926 | 115,693 | 90,301 | 117,106 | 128,954 | 144,936
Total consumer real estate loans [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss | 13,035 | 9,708 | 8,004 | 6,854 | 6,359 | 6,585
Consumer Loan [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss | 9,563 | 8,457 | 7,017 | 12,135 | 9,074 | 7,837
Loans Receivable [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss | 233,619 | $ 231,514 | 227,621 | $ 239,632 | $ 246,835 | $ 248,666
Modeled Expected Credit Losses [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss | 85,769 |  | 110,292 |  |  |
Modeled Expected Credit Losses [Member] | Commercial Portfolio Segment [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss | 46,435 |  | 61,918 |  |  |
Modeled Expected Credit Losses [Member] | Commercial and Industrial Total Energy Loans [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss | 5,733 |  | 8,531 |  |  |
Modeled Expected Credit Losses [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss | 15,496 |  | 27,013 |  |  |
Modeled Expected Credit Losses [Member] | Total consumer real estate loans [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss | 12,594 |  | 7,847 |  |  |
Modeled Expected Credit Losses [Member] | Consumer Loan [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss | 5,511 |  | 4,983 |  |  |
Q-factor adjustments [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss | 141,389 |  | 105,148 |  |  |
Q-factor adjustments [Member] | Commercial Portfolio Segment [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss | 26,270 |  | 36,237 |  |  |
Q-factor adjustments [Member] | Commercial and Industrial Total Energy Loans [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss | 6,496 |  | 5,148 |  |  |
Q-factor adjustments [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss | 104,130 |  | 61,572 |  |  |
Q-factor adjustments [Member] | Total consumer real estate loans [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss | 441 |  | 157 |  |  |
Q-factor adjustments [Member] | Consumer Loan [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss | 4,052 |  | 2,034 |  |  |
Specific Valuation Allowances [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss | 6,461 |  | 12,181 |  |  |
Specific Valuation Allowances [Member] | Commercial Portfolio Segment [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss | 2,461 |  | 6,082 |  |  |
Specific Valuation Allowances [Member] | Commercial and Industrial Total Energy Loans [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss | 2,700 |  | 4,383 |  |  |
Specific Valuation Allowances [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss | 1,300 |  | 1,716 |  |  |
Specific Valuation Allowances [Member] | Total consumer real estate loans [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss | 0 |  | 0 |  |  |
Specific Valuation Allowances [Member] | Consumer Loan [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss | $ 0 |  | $ 0 |  |  |

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://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(4)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (1) -Publisher SEC Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (3) -Publisher SEC Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (c) -Publisher SEC Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479344/326-20-45-1 Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(7)(2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 11B -Subparagraph (c)(1) -SubTopic 10 -Topic 310 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-11B Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-13 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-13 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLosses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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 Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-13 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph c -Publisher SEC + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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=us-gaap_CommercialRealEstatePortfolioSegmentMember
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: |

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

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=cfr_ModeledExpectedCreditLossesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=cfr_QfactoradjustmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=cfr_SpecificValuationAllowancesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |