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Deposits - Additional Information About Corporation's Deposits (Detail) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2014 | Dec. 31, 2013
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Banking and Thrift [Abstract] |  |
Deposits from the Certificate of Deposit Account Registry Service (CDARS) | $ 38,503 | $ 200
Promontory Interfinancial Network Insured Cash Sweep Service | 121,229 | 0
Deposits from foreign sources (primarily Mexico) | $ 763,847 | $ 769,970

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- Definition This element represents Certificate Of Deposit Account Registry Service (CDARS) deposits held + References No definition available. + Details
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Namespace Prefix: | cfr_
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Balance Type: | credit
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- Definition Promontory Interfinancial Network Insured Cash Sweep Service + References No definition available. + Details
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Balance Type: | credit
Period Type: | instant

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- Details
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- Definition The aggregate of all foreign interest-bearing and noninterest-bearing deposit liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 235 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-05(a)) -URI http://asc.fasb.org/extlink&oid=6882215&loc=d3e537907-122884 Reference 2: 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(a)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Subparagraph a -Article 9 + Details
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