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REGULATORY MATTERS (Tables)
12 Months Ended
Dec. 31, 2013
Banking And Thrift [Abstract]  
Schedule of Company and Bank Capital Ratios

The following is a summary of the Company’s and the Bank’s capital ratios at December 31, 2013 and 2012:

 

      Actual     For Capital
Adequacy Purposes
    To Be Categorized As
Well Capitalized Under
Prompt Corrective
Action Provisions
 
     Amount      Ratio     Amount      Ratio     Amount      Ratio  
     (Dollars in thousands)  

CONSOLIDATED:

               

As of December 31, 2013

               

Total Capital
(to Risk Weighted Assets)

   $ 1,259,768         14.02   $ 719,005         8.00     N/A         N/A   

Tier I Capital
(to Risk Weighted Assets)

     1,192,486         13.27     359,502         4.00     N/A         N/A   

Tier I Capital
(to Average Tangible Assets)

     1,192,486         7.42     481,892         3.00     N/A         N/A   

As of December 31, 2012

               

Total Capital
(to Risk Weighted Assets)

   $ 974,702         15.22   $ 512,171         8.00     N/A         N/A   

Tier I Capital
(to Risk Weighted Assets)

     922,138         14.40     256,086         4.00     N/A         N/A   

Tier I Capital
(to Average Tangible Assets)

     922,138         7.10     389,831         3.00     N/A         N/A   

PROSPERITY BANK® ONLY:

               

As of December 31, 2013

               

Total Capital
(to Risk Weighted Assets)

   $ 1,229,752         13.70   $ 718,334         8.00   $ 897,917         10.00

Tier I Capital
(to Risk Weighted Assets)

     1,162,470         12.95     359,167         4.00     538,750         6.00

Tier I Capital
(to Average Tangible Assets)

     1,162,470         7.24     481,640         3.00     802,733         5.00

As of December 31, 2012

               

Total Capital
(to Risk Weighted Assets)

   $ 959,907         15.01   $ 511,612         8.00   $ 639,516         10.00

Tier I Capital
(to Risk Weighted Assets)

     907,343         14.19     255,806         4.00     383,709         6.00

Tier I Capital
(to Average Tangible Assets)

     907,343         6.99     389,622         3.00     649,370         5.00