Annual report [Section 13 and 15(d), not S-K Item 405]

Note 13 - Regulatory Matters - The Company's and Bank's Actual Capital Amounts and Ratios (Details)

v3.25.4
Note 13 - Regulatory Matters - The Company's and Bank's Actual Capital Amounts and Ratios (Details)
$ in Thousands
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
CET 1 Capital to risk weighted assets, amount $ 1,838,024 $ 1,634,837
CET 1 Capital to risk weighted assets, ratio 0.1165 0.1142
CET 1 Capital to risk weighted assets, for capital adequacy purposes, amount $ 709,755 $ 644,441
CET 1 capital to risk weighted assets, for capital adequacy purposes, ratio 4.50% 4.50%
Tier 1 capital to risk weighted assets, amount $ 1,838,524 $ 1,635,337
Tier 1 capital to risk weighted assets, ratio 0.1166 0.1142
Tier 1 capital to risk weighted assets, for capital adequacy purposes, amount $ 946,340 $ 859,255
Tier 1 capital to risk weighted assets, for capital adequacy purposes, ratio 0.06 0.06
Total capital to risk weighted assets, amount $ 2,038,579 $ 1,847,146
Total capital to risk weighted assets, ratio 0.1293 0.129
Total capital to risk weighted assets, for capital adequacy purposes, amount $ 1,261,787 $ 1,145,673
Total capital to risk weighted assets, for capital adequacy purposes, ratio 0.08 0.08
Tier 1 capital to average assets, amount $ 1,838,524 $ 1,635,337
Tier 1 capital to average assets, ratio 0.1026 0.0959
Tier 1 capital to average assets, for capital adequacy purposes, amount $ 717,027 $ 682,238
Tier 1 capital to average assets, for capital adequacy purposes, ratio 0.04 0.04
Servisfirst Bank [Member]    
CET 1 Capital to risk weighted assets, amount $ 1,866,335 $ 1,694,412
CET 1 Capital to risk weighted assets, ratio 0.1183 0.1183
CET 1 Capital to risk weighted assets, for capital adequacy purposes, amount $ 709,698 $ 644,402
CET 1 capital to risk weighted assets, for capital adequacy purposes, ratio 4.50% 4.50%
CET 1 capital to risk weighted assets, to be well capitalized under prompt corrective action provisions, amount $ 1,025,119 $ 930,803
CET 1 capital to risk weighted assets, to be well capitalized under prompt corrective action provisions, ratio 6.50% 6.50%
Tier 1 capital to risk weighted assets, amount $ 1,866,835 $ 1,694,912
Tier 1 capital to risk weighted assets, ratio 0.1184 0.1184
Tier 1 capital to risk weighted assets, for capital adequacy purposes, amount $ 946,264 $ 859,203
Tier 1 capital to risk weighted assets, for capital adequacy purposes, ratio 0.06 0.06
Tier 1 capital to risk weighted assets, to be well capitalized under prompt corrective action provisions, amount $ 1,261,685 $ 1,145,604
Tier 1 capital to risk weighted assets, to be well capitalized under prompt corrective action provisions, ratio 0.08 0.08
Total capital to risk weighted assets, amount $ 2,039,090 $ 1,859,978
Total capital to risk weighted assets, ratio 0.1293 0.1299
Total capital to risk weighted assets, for capital adequacy purposes, amount $ 1,261,685 $ 1,145,604
Total capital to risk weighted assets, for capital adequacy purposes, ratio 0.08 0.08
Total capital to risk weighted assets, to be well capitalized under prompt corrective action provisions, amount $ 1,577,107 $ 1,432,005
Total capital to risk weighted assets, to be well capitalized under prompt corrective action provisions, ratio 0.10 0.10
Tier 1 capital to average assets, amount $ 1,866,835 $ 1,694,912
Tier 1 capital to average assets, ratio 0.1041 0.0994
Tier 1 capital to average assets, for capital adequacy purposes, amount $ 716,995 $ 682,223
Tier 1 capital to average assets, for capital adequacy purposes, ratio 0.04 0.04
Tier 1 capital to average assets, to be well capitalized under prompt corrective action provisions, amount $ 896,244 $ 852,779
Tier 1 capital to average assets, to be well capitalized under prompt corrective action provisions, ratio 0.05 0.05