XML 81 R70.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Deposits - Schedule of Deposits (Detail) - USD ($) $ in Thousands | Sep. 30, 2016 | Dec. 31, 2015
--- | --- | ---
Deposit [Line Items] |  |
Total non-interest-bearing demand deposits | $ 10,280,060 | $ 10,270,233
Total interest-bearing deposits | 14,827,488 | 14,073,362
Total deposits | $ 25,107,548 | $ 24,343,595
Total non-interest-bearing demand deposits, Percentage of Total | 40.90% | 42.20%
Total interest-bearing deposits, Percentage of Total | 59.10% | 57.80%
Total deposits, Percentage of Total | 100.00% | 100.00%
Commercial and Individual [Member] |  |
Deposit [Line Items] |  |
Total non-interest-bearing demand deposits | $ 9,422,496 | $ 9,251,463
Total non-interest-bearing demand deposits, Percentage of Total | 37.50% | 38.00%
Correspondent Banks [Member] |  |
Deposit [Line Items] |  |
Total non-interest-bearing demand deposits | $ 316,037 | $ 378,930
Total non-interest-bearing demand deposits, Percentage of Total | 1.30% | 1.60%
Private Accounts [Member] |  |
Deposit [Line Items] |  |
Savings and interest checking | $ 6,094,960 | $ 5,149,905
Money market accounts | 7,510,102 | 7,536,998
Time accounts of $100,000 or More | 457,229 | 463,740
Time accounts under $100,000 | 343,593 | 362,683
Total private accounts | $ 14,405,884 | $ 13,513,326
Savings and interest checking, Percentage of Total | 24.30% | 21.10%
Money market accounts, Percentage of Total | 29.90% | 31.00%
Time accounts of $100,000 or more, Percentage of Total | 1.80% | 1.90%
Time accounts under $100,000, Percentage of Total | 1.40% | 1.50%
Total private accounts, Percentage of Total | 57.40% | 55.50%
Public Funds [Member] |  |
Deposit [Line Items] |  |
Total non-interest-bearing demand deposits | $ 541,527 | $ 639,840
Savings and interest checking | 314,998 | 420,324
Money market accounts | 88,553 | 93,969
Time accounts of $100,000 or More | 17,379 | 44,941
Time accounts under $100,000 | 674 | 802
Total public funds | $ 421,604 | $ 560,036
Total non-interest-bearing demand deposits, Percentage of Total | 2.10% | 2.60%
Savings and interest checking, Percentage of Total | 1.30% | 1.70%
Money market accounts, Percentage of Total | 0.30% | 0.40%
Time accounts of $100,000 or more, Percentage of Total | 0.10% | 0.20%
Time accounts under $100,000, Percentage of Total | 0.00% | 0.00%
Total public funds, Percentage of Total | 1.70% | 2.30%

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

X
- Definition Deposits Percentage + References No definition available. + Details
Name: | cfr_DepositsPercentage
Namespace Prefix: | cfr_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Interest Bearing Deposits Public Funds + References No definition available. + Details
Name: | cfr_InterestBearingDepositsPublicFunds
Namespace Prefix: | cfr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Interest Bearing Private Accounts Deposits + References No definition available. + Details
Name: | cfr_InterestBearingPrivateAccountsDeposits
Namespace Prefix: | cfr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Percentage Of Non Interest Bearing Demand Deposits To Deposit + References No definition available. + Details
Name: | cfr_PercentageOfNonInterestBearingDemandDepositsToDeposit
Namespace Prefix: | cfr_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage Of Non Interest Bearing Demand Deposits To Deposits + References No definition available. + Details
Name: | cfr_PercentageOfNonInterestBearingDemandDepositsToDeposits
Namespace Prefix: | cfr_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage Of Public Funds To Deposits + References No definition available. + Details
Name: | cfr_PercentageOfPublicFundsToDeposits
Namespace Prefix: | cfr_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage Of Time Accounts Of 100000 Or More To Deposits + References No definition available. + Details
Name: | cfr_PercentageOfTimeAccountsOf100000OrMoreToDeposits
Namespace Prefix: | cfr_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage Of Time Accounts Under 100000 To Deposits + References No definition available. + Details
Name: | cfr_PercentageOfTimeAccountsUnder100000ToDeposits
Namespace Prefix: | cfr_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.12) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_Deposits
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of deposits in accounts that offer many of the same services as checking accounts although transactions may be somewhat more limited, share some of the characteristics of a money market fund and are insured by the Federal government, also known as money market accounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.12) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_DepositsMoneyMarketDeposits
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of interest bearing deposits with no stated maturity, which may include passbook and statement savings accounts and money-market deposit accounts (MMDAs). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.12) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_DepositsSavingsDeposits
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The aggregate of all domestic and foreign interest-bearing deposit liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.12) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_InterestBearingDepositLiabilities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The aggregate amount of all domestic and foreign noninterest-bearing deposits liabilities held by the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.12) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_NoninterestBearingDepositLiabilities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Percentage of interest-bearing domestic deposit liabilities to total deposit liabilities. + References No definition available. + Details
Name: | us-gaap_PercentageOfInterestBearingDomesticDepositsToDeposits
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage of interest-bearing domestic money market demand account deposit liabilities to total deposit liabilities. + References No definition available. + Details
Name: | us-gaap_PercentageOfInterestBearingDomesticDepositsToDepositsMoneyMarket
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage of interest-bearing domestic savings deposit liabilities to total deposit liabilities. + References No definition available. + Details
Name: | us-gaap_PercentageOfInterestBearingDomesticDepositsToDepositsSavings
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of time deposit liabilities, including certificates of deposit, in denominations of $100,000 or more. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Industry Guide -Number 3 -Section V -Paragraph D-E + Details
Name: | us-gaap_TimeDeposits100000OrMore
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of time deposit liabilities, including certificates of deposit, in denominations of less than $100,000. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Industry Guide -Number 3 -Section V -Paragraph D-E + Details
Name: | us-gaap_TimeDepositsLessThan100000
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=cfr_CommercialAndIndividualMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=cfr_CorrespondentBanksMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=cfr_PrivateAccountsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=cfr_PublicFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |