Capital and Regulatory Matters (Tables)

6 Months Ended

Jun. 30, 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
June 30, 2014
Total Capital to Risk-Weighted Assets
Cullen/Frost	$	2,222,110	14.76	%	$	1,204,711	8.00	%	$	1,505,889	10.00	%
Frost Bank	1,974,337		13.14		1,202,231		8.00		1,502,789		10.00
Tier 1 Capital to Risk-Weighted Assets
Cullen/Frost	2,083,824		13.84		602,356		4.00		903,534		6.00
Frost Bank	1,882,678		12.53		601,115		4.00		901,673		6.00
Leverage Ratio
Cullen/Frost	2,083,824		8.66		962,662		4.00		1,203,327		5.00
Frost Bank	1,882,678		7.97		944,472		4.00		1,180,590		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