XML 40 R29.htm IDEA: XBRL DOCUMENT
v3.25.2

Commitments and Contingencies (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2025
Commitments and Contingencies Disclosure [Abstract] |
Financial Instruments with Off-Balance-Sheet Risk | Financial instruments with off-balance-sheet risk were as follows:
| June 30, 2025 |  | December 31, 2024
Commitments to extend credit | $ | 11,804,295 |  |  | $ | 12,046,520 |
Standby letters of credit | 399,767 |  |  | 449,176 |
Deferred standby letter of credit fees | 2,601 |  |  | 3,071 |
Commitments, Off-Balance-Sheet, Allowance for Credit Losses [Table Text Block] | The following table details activity in the allowance for credit losses on off-balance-sheet credit exposures.
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2025 |  | 2024 |  | 2025 |  | 2024
Beginning balance | $ | 49,946 |  |  | $ | 53,751 |  |  | $ | 51,904 |  |  | $ | 51,751 |
Credit loss expense (benefit) | (337) |  |  | 51 |  |  | (2,295) |  |  | 2,051 |
Ending balance | $ | 49,609 |  |  | $ | 53,802 |  |  | $ | 49,609 |  |  | $ | 53,802 |
Lease Commitments, Components of Lease Expense [Table Text Block] | We lease certain office facilities and office equipment under operating leases. The components of total lease expense were as follows:
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2025 |  | 2024 |  | 2025 |  | 2024
Amortization of lease right-of-use assets | $ | 9,085 |  |  | $ | 8,829 |  |  | $ | 18,126 |  |  | $ | 17,619 |
Short-term lease expense | 239 |  |  | 394 |  |  | 573 |  |  | 719 |
Non-lease components (including taxes, insurance, common maintenance, etc.) | 3,882 |  |  | 3,466 |  |  | 7,636 |  |  | 7,015 |
Total | $ | 13,206 |  |  | $ | 12,689 |  |  | $ | 26,335 |  |  | $ | 25,353 |

X
- Definition [Table Text Block] for Commitments, Off-Balance-Sheet, Allowance for Credit Losses [Table] + References No definition available. + Details
Name: | cfr_CommitmentsOffBalanceSheetAllowanceforCreditLossesTableTextBlock
Namespace Prefix: | cfr_
Data Type: | dtr-types1:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition [Table Text Block] for Lease Commitments, Components of Lease Expense [Table] + References No definition available. + Details
Name: | cfr_LeaseCommitmentsComponentsofLeaseExpenseTableTextBlock
Namespace Prefix: | cfr_
Data Type: | dtr-types1:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined) which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-10 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 + Details
Name: | us-gaap_ScheduleOfFairValueOffBalanceSheetRisksTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration