Annual report pursuant to Section 13 and 15(d)

The Company's And Bank's Actual Capital Amounts And Ratios (Detail)

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The Company's And Bank's Actual Capital Amounts And Ratios (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Servisfirst Bank [Member]
    
Total Capital to Risk Weighted Assets, Actual Amount $ 284,141 $ 243,279
Total Capital to Risk Weighted Assets, Actual Ratio 11.66% 12.63%
Total Capital to Risk Weighted Assets, For Capital Adequacy Purposes, Amount 194,942 154,070
Total Capital to Risk Weighted Assets, For Capital Adequacy Purposes, Ratio 8.00% 8.00%
Total Capital to Risk Weighted Assets, To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount 243,678 192,588
Total Capital to Risk Weighted Assets, To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio 10.00% 10.00%
Tier I Capital to Risk Weighted Assets, Actual Amount 257,883 216,295
Tier I Capital to Risk Weighted Assets, Actual Ratio 10.58% 11.23%
Tier I Capital to Risk Weighted Assets, For Capital Adequacy Purposes, Amount 97,471 77,035
Tier I Capital to Risk Weighted Assets, For Capital Adequacy Purposes, Ratio 4.00% 4.00%
Tier I Capital to Risk Weighted Assets, To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount 146,207 115,553
Tier I Capital to Risk Weighted Assets, To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio 6.00% 6.00%
Tier I Capital to Average Assets, Actual Amount 257,883 216,295
Tier I Capital to Average Assets, Actual Ratio 9.03% 9.06%
Tier I Capital to Average Assets, For Capital Adequacy Purposes, Amount 114,227 95,481
Tier I Capital to Average Assets, For Capital Adequacy Purposes, Ratio 4.00% 4.00%
Tier I Capital to Average Assets, To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount 142,784 119,352
Tier I Capital to Average Assets, To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio 5.00% 5.00%
Consolidated Entities [Member]
    
Total Capital to Risk Weighted Assets, Actual Amount 287,136 246,334
Total Capital to Risk Weighted Assets, Actual Ratio 11.78% 12.79%
Total Capital to Risk Weighted Assets, For Capital Adequacy Purposes, Amount 194,943 154,094
Total Capital to Risk Weighted Assets, For Capital Adequacy Purposes, Ratio 8.00% 8.00%
Total Capital to Risk Weighted Assets, To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount 0 0
Total Capital to Risk Weighted Assets, To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio 0.00% 0.00%
Tier I Capital to Risk Weighted Assets, Actual Amount 240,961 219,350
Tier I Capital to Risk Weighted Assets, Actual Ratio 9.89% 11.39%
Tier I Capital to Risk Weighted Assets, For Capital Adequacy Purposes, Amount 97,472 77,047
Tier I Capital to Risk Weighted Assets, For Capital Adequacy Purposes, Ratio 4.00% 4.00%
Tier I Capital to Risk Weighted Assets, To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount 0 0
Tier I Capital to Risk Weighted Assets, To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio 0.00% 0.00%
Tier I Capital to Average Assets, Actual Amount 240,961 219,350
Tier I Capital to Average Assets, Actual Ratio 8.43% 9.17%
Tier I Capital to Average Assets, For Capital Adequacy Purposes, Amount 114,323 95,642
Tier I Capital to Average Assets, For Capital Adequacy Purposes, Ratio 4.00% 4.00%
Tier I Capital to Average Assets, To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount $ 0 $ 0
Tier I Capital to Average Assets, To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio 0.00% 0.00%