XML 93 R82.htm IDEA: XBRL DOCUMENT
v3.24.3

Derivative Financial Instruments - Schedule of Notional Amounts and Estimated Fair Values of Commodity Derivative Positions (Detail) bbl in Thousands, MMBTU in Thousands, $ in Thousands | Sep. 30, 2024 USD ($) MMBTU bbl | Dec. 31, 2023 USD ($) MMBTU bbl
--- | --- | ---
Financial Institution Counterparties [Member] | Oil Commodity Derivative [Member] |  |
Derivative Instruments [Line Items] |  |
Oil/Natural Gas Derivative Assets, Notional Amount | bbl | 6,771 | 5,601
Oil/Natural Gas Derivative Liabilities, Notional Amount | bbl | 4,713 | 4,581
Oil/Natural Gas Derivative Assets, Estimated Fair Value | $ 41,766 | $ 37,667
Oil/Natural Gas Derivative Liabilities, Estimated Fair Value | $ (11,447) | $ (18,500)
Financial Institution Counterparties [Member] | Natural Gas Commodity Derivative [Member] |  |
Derivative Instruments [Line Items] |  |
Oil/Natural Gas Derivative Assets, Notional Amount | MMBTU | 22,467 | 17,363
Oil/Natural Gas Derivative Liabilities, Notional Amount | MMBTU | 8,572 | 6,462
Oil/Natural Gas Derivative Assets, Estimated Fair Value | $ 8,237 | $ 11,822
Oil/Natural Gas Derivative Liabilities, Estimated Fair Value | $ (2,575) | $ (2,499)
Customer Counterparties [Member] | Oil Commodity Derivative [Member] |  |
Derivative Instruments [Line Items] |  |
Oil/Natural Gas Derivative Assets, Notional Amount | bbl | 4,854 | 4,618
Oil/Natural Gas Derivative Liabilities, Notional Amount | bbl | 6,629 | 5,564
Oil/Natural Gas Derivative Assets, Estimated Fair Value | $ 11,485 | $ 18,722
Oil/Natural Gas Derivative Liabilities, Estimated Fair Value | $ (40,915) | $ (36,877)
Customer Counterparties [Member] | Natural Gas Commodity Derivative [Member] |  |
Derivative Instruments [Line Items] |  |
Oil/Natural Gas Derivative Assets, Notional Amount | MMBTU | 8,572 | 6,462
Oil/Natural Gas Derivative Liabilities, Notional Amount | MMBTU | 22,467 | 17,363
Oil/Natural Gas Derivative Assets, Estimated Fair Value | $ 2,594 | $ 2,499
Oil/Natural Gas Derivative Liabilities, Estimated Fair Value | $ (7,861) | $ (11,571)

X
- Definition Derivative, Assets Nonmonetary Notional Amount + References No definition available. + Details
Name: | cfr_DerivativeAssetsNonmonetaryNotionalAmount
Namespace Prefix: | cfr_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition Derivative Instruments [Line Items] + References No definition available. + Details
Name: | cfr_DerivativeInstrumentsLineItems
Namespace Prefix: | cfr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Derivative, Liabilities Nonmonetary Notional Amount + References No definition available. + Details
Name: | cfr_DerivativeLiabilitiesNonmonetaryNotionalAmount
Namespace Prefix: | cfr_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition Fair value as of the balance sheet date of derivative instrument not designated as hedging instrument and classified as an asset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-4B + Details
Name: | us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value as of the balance sheet date of derivative instrument not designated as hedging instrument and classified as a liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-4B + Details
Name: | us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | srt_CounterpartyNameAxis=cfr_FinancialInstitutionCounterpartiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=cfr_OilCommodityDerivativeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=cfr_NaturalGasCommodityDerivativeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CounterpartyNameAxis=cfr_CustomerCounterpartiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |