Annual report pursuant to Section 13 and 15(d)

REGULATORY MATTERS (The Company's And Bank's Actual Capital Amounts And Ratios) (Details)

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REGULATORY MATTERS (The Company's And Bank's Actual Capital Amounts And Ratios) (Details) - USD ($)
Dec. 31, 2015
Dec. 31, 2014
Servisfirst Bank [Member]    
CET I Capital to Risk Weighted Assets, Amount $ 439,279  
CET I Capital to Risk Weighted Assets, Ratio 9.89%  
CET I Capital to Risk Weighted Assets, For Capital Adequacy Purposes, Amount $ 199,806  
CET I Capital to Risk Weighted Assets, For Capital Adequacy Purposes, Ratio 4.50%  
CET I Capital to Risk Weighted Assets, To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount $ 288,608  
CET I Capital to Risk Weighted Assets, To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio 6.50%  
Tier I Capital to Risk Weighted Assets, Actual Amount $ 439,656 $ 362,119
Tier I Capital to Risk Weighted Assets, Actual Ratio 9.90% 10.58%
Tier I Capital to Risk Weighted Assets, For Capital Adequacy Purposes, Amount $ 266,407 $ 136,970
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets 6.00% 4.00%
Tier I Capital to Risk Weighted Assets, To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount $ 355,210 $ 205,454
Tier I Capital to Risk Weighted Assets, To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio 8.00% 6.00%
Total Capital to Risk Weighted Assets, Actual Amount $ 483,575 $ 397,748
Total Capital to Risk Weighted Assets, Actual Ratio 10.89% 11.62%
Total Capital to Risk Weighted Assets, For Capital Adequacy Purposes, Amount $ 355,210 $ 273,939
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 $ 444,012 $ 342,424
Total Capital to Risk Weighted Assets, To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio 10.00% 10.00%
Tier I Capital to Average Assets, Actual Amount $ 439,656 $ 362,119
Tier I Capital to Average Assets, Actual Ratio 8.71% 8.92%
Tier I Capital to Average Assets, For Capital Adequacy Purposes, Amount $ 202,023 $ 162,375
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 $ 252,529 $ 202,969
Tier I Capital to Average Assets, To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio 5.00% 5.00%
Consolidated Entities [Member]    
CET I Capital to Risk Weighted Assets, Amount $ 431,642  
CET I Capital to Risk Weighted Assets, Ratio 9.72%  
CET I Capital to Risk Weighted Assets, For Capital Adequacy Purposes, Amount $ 199,836  
CET I Capital to Risk Weighted Assets, For Capital Adequacy Purposes, Ratio 4.50%  
Tier I Capital to Risk Weighted Assets, Actual Amount $ 432,019 $ 402,471
Tier I Capital to Risk Weighted Assets, Actual Ratio 9.73% 11.75%
Tier I Capital to Risk Weighted Assets, For Capital Adequacy Purposes, Amount $ 266,448 $ 136,972
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets 6.00% 4.00%
Total Capital to Risk Weighted Assets, Actual Amount $ 530,688 $ 458,073
Total Capital to Risk Weighted Assets, Actual Ratio 11.95% 13.38%
Total Capital to Risk Weighted Assets, For Capital Adequacy Purposes, Amount $ 355,264 $ 273,943
Total Capital to Risk Weighted Assets, For Capital Adequacy Purposes, Ratio 8.00% 8.00%
Tier I Capital to Average Assets, Actual Amount $ 432,019 $ 402,471
Tier I Capital to Average Assets, Actual Ratio 8.55% 9.91%
Tier I Capital to Average Assets, For Capital Adequacy Purposes, Amount $ 202,043 $ 162,377
Tier I Capital to Average Assets, For Capital Adequacy Purposes, Ratio 4.00% 4.00%