XML 100 R102.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Fair Value Measurements - Foreclosed Assets Remeasured and Reported at Fair Value (Detail) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2014 | Mar. 31, 2013
--- | --- | ---
Foreclosed Assets Remeasured at Initial Recognition [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Carrying value of foreclosed assets prior to remeasurement | $ 2,198 | $ 415
Charge-offs recognized in the allowance for loan losses | (204) | (141)
Fair value | 1,994 | 274
Foreclosed Assets Remeasured Subsequent to Initial Recognition [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Carrying value of foreclosed assets prior to remeasurement | 499 | 3,600
Write-downs included in other non-interest expense | (244) | (565)
Fair value | $ 255 | $ 3,035

X
- Definition Carrying Value Of Foreclosed Assets Prior To Remeasurement + References No definition available. + Details
Name: | cfr_CarryingValueOfForeclosedAssetsPriorToRemeasurement
Namespace Prefix: | cfr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Charge Offs Recognized In Allowance For Loan Losses + References No definition available. + Details
Name: | cfr_ChargeOffsRecognizedInAllowanceForLoanLosses
Namespace Prefix: | cfr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Write-downs included in other non-interest expense + References No definition available. + Details
Name: | cfr_WriteDownsIncludedInOtherNonInterestExpense
Namespace Prefix: | cfr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Carrying amount as of the balance sheet date of all assets obtained in full or partial satisfaction of a debt arrangement through foreclosure proceedings or defeasance; includes real and personal property; equity interests in corporations, partnerships, and joint ventures; and beneficial interests in trusts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4437-111522 + Details
Name: | us-gaap_ForeclosedAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant