XML 99 R83.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Premises and Equipment (Lease Commitments, Components of Lease Expense) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Property, Plant and Equipment [Line Items] |  |
Amortization of lease right-of-use assets | $ 32,811 | $ 32,772
Short-term lease expense | 1,595 | 1,799
Non-lease components (including taxes, insurance, common maintenance, etc.) | 11,203 | 11,396
Total operating lease expense, excluding rent | $ 45,609 | $ 45,967

X
- Definition Operating lease non-lease components. Including items such as taxes, insurance, and common area maintenance costs. + References No definition available. + Details
Name: | cfr_OperatingLeaseNonLeaseComponents
Namespace Prefix: | cfr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Short term operating lease rent expense + References No definition available. + Details
Name: | cfr_Shorttermoperatingleaserentexpense
Namespace Prefix: | cfr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Total operating lease expense, excluding rent + References No definition available. + Details
Name: | cfr_Totaloperatingleaseexpenseexcludingrent
Namespace Prefix: | cfr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of amortization expense for right-of-use asset from operating lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 + Details
Name: | us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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_PropertyPlantAndEquipmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration