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Capital and Regulatory Matters (Tables) | 3 Months Ended
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Mar. 31, 2014
Banking and Thrift [Abstract] |
Actual and Required Capital Ratios | Actual and required capital ratios for Cullen/Frost and Frost Bank were as follows:
| Actual |  | Minimum Required for Capital Adequacy Purposes |  | Required to be Considered Well Capitalized
| Capital Amount |  | Ratio |  | Capital Amount |  | Ratio |  | Capital Amount |  | Ratio
March 31, 2014 |  |  |  |  |  |  |  |  |  |  |
Total Capital to Risk-Weighted Assets |  |  |  |  |  |  |  |  |  |  |
Cullen/Frost | $ | 2,143,633 |  |  | 15.38 | % |  | $ | 1,114,668 |  |  | 8.00 | % |  | $ | 1,393,334 |  |  | 10.00 | %
Frost Bank | 1,812,731 |  |  | 13.04 |  |  | 1,112,278 |  |  | 8.00 |  |  | 1,390,347 |  |  | 10.00 |
Tier 1 Capital to Risk-Weighted Assets |  |  |  |  |  |  |  |  |  |  |
Cullen/Frost | 2,008,477 |  |  | 14.41 |  |  | 557,334 |  |  | 4.00 |  |  | 836,001 |  |  | 6.00 |
Frost Bank | 1,738,154 |  |  | 12.50 |  |  | 556,139 |  |  | 4.00 |  |  | 834,208 |  |  | 6.00 |
Leverage Ratio |  |  |  |  |  |  |  |  |  |  |
Cullen/Frost | 2,008,477 |  |  | 8.59 |  |  | 935,707 |  |  | 4.00 |  |  | 1,169,634 |  |  | 5.00 |
Frost Bank | 1,738,154 |  |  | 7.45 |  |  | 933,117 |  |  | 4.00 |  |  | 1,166,397 |  |  | 5.00 |
December 31, 2013 |  |  |  |  |  |  |  |  |  |  |
Total Capital to Risk-Weighted Assets |  |  |  |  |  |  |  |  |  |  |
Cullen/Frost | $ | 2,110,774 |  |  | 15.52 | % |  | $ | 1,088,349 |  |  | 8.00 | % |  | $ | 1,360,437 |  |  | 10.00 | %
Frost Bank | 1,780,313 |  |  | 13.12 |  |  | 1,085,447 |  |  | 8.00 |  |  | 1,356,809 |  |  | 10.00 |
Tier 1 Capital to Risk-Weighted Assets |  |  |  |  |  |  |  |  |  |  |
Cullen/Frost | 1,958,336 |  |  | 14.39 |  |  | 544,175 |  |  | 4.00 |  |  | 816,262 |  |  | 6.00 |
Frost Bank | 1,707,307 |  |  | 12.58 |  |  | 542,724 |  |  | 4.00 |  |  | 814,085 |  |  | 6.00 |
Leverage Ratio |  |  |  |  |  |  |  |  |  |  |
Cullen/Frost | 1,958,336 |  |  | 8.49 |  |  | 922,728 |  |  | 4.00 |  |  | 1,153,410 |  |  | 5.00 |
Frost Bank | 1,707,307 |  |  | 7.42 |  |  | 920,107 |  |  | 4.00 |  |  | 1,150,134 |  |  | 5.00 |

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- Definition Tabular disclosure of the capital amounts and ratios as of the balance sheet date, indicating whether the entity or entities are in compliance with regulatory capital requirements, by entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=7881181&loc=d3e65071-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7881181&loc=SL5958568-112826 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=7881181&loc=SL5958570-112826 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1G -URI http://asc.fasb.org/extlink&oid=7881181&loc=SL5958577-112826 + Details
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