XML 77 R103.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Pending Acquisitions - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified | 9 Months Ended
--- | ---
Sep. 30, 2013
Business Acquisition [Line Items] |
Common stock number of shares issued for consideration | 2,000,000
Amount of cash consideration | $ 220
Period used to determine volume weighted average price of shares issued in the merger | 10 days
Targeted Shareholders' Equity At Closing | $ 87
Jack Wood [Member] |
Business Acquisition [Line Items] |
Holding period of common stock received in merger | 1 year
Donald Wood [Member] |
Business Acquisition [Line Items] |
Holding period of common stock received in merger | 6 months

X
- Definition Holding Period of Common Stock Received in Merger + References No definition available. + Details
Name: | cfr_HoldingPeriodofCommonStockReceivedinMerger
Namespace Prefix: | cfr_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period used to determine volume weighted average price of shares issued in the merger + References No definition available. + Details
Name: | cfr_Periodusedtodeterminevolumeweightedaveragepriceofsharesissuedinthemerger
Namespace Prefix: | cfr_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Targeted Shareholders' Equity At Closing + References No definition available. + Details
Name: | cfr_TargetedShareholdersEquityAtClosing
Namespace Prefix: | cfr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Number of shares of equity interests issued or issuable to acquire entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(4) -URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e6927-128479 + Details
Name: | us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
Name: | us-gaap_PaymentsToAcquireBusinessesGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration