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

Note 3 - Loans - Loans Modified During Period (Details)

Note 3 - Loans - Loans Modified During Period (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2025	Dec. 31, 2025	Dec. 31, 2024
Modified Amortized Cost		$ 30,406	$ 22,436
Modified Amortized Cost, percent		0.22%	0.17%
Extended Maturity [Member]
Modified Amortized Cost		$ 150	$ 3,985
Payment Deferral [Member]
Modified Amortized Cost		29,762	18,355
Payment Deferral and Extended Maturity [Member]
Modified Amortized Cost		494	0
New Loan [Member]
Modified Amortized Cost		0	96
Commercial Real Estate Portfolio Segment [Member] \| Commercial, Financial, and Agricultural Loans [Member]
Modified Amortized Cost		10,807	$ 12,602
Total Payment Deferral	$ 1,403	$ 903
Modified Amortized Cost, percent		0.08%	0.10%
Commercial Real Estate Portfolio Segment [Member] \| Commercial, Financial, and Agricultural Loans [Member] \| Minimum [Member]
Financing Receivable, Modified, Term Extension (Month)		3 months	4 months
Term Extensions (Month)		3 months	4 months
Commercial Real Estate Portfolio Segment [Member] \| Commercial, Financial, and Agricultural Loans [Member] \| Maximum [Member]
Financing Receivable, Modified, Term Extension (Month)		58 months	95 months
Term Extensions (Month)		58 months	95 months
Commercial Real Estate Portfolio Segment [Member] \| Extended Maturity [Member] \| Commercial, Financial, and Agricultural Loans [Member]
Modified Amortized Cost		$ 150	$ 248
Commercial Real Estate Portfolio Segment [Member] \| Payment Deferral [Member] \| Commercial, Financial, and Agricultural Loans [Member]
Modified Amortized Cost		10,163	12,354
Commercial Real Estate Portfolio Segment [Member] \| Payment Deferral and Extended Maturity [Member] \| Commercial, Financial, and Agricultural Loans [Member]
Modified Amortized Cost		494	0
Commercial Real Estate Portfolio Segment [Member] \| New Loan [Member] \| Commercial, Financial, and Agricultural Loans [Member]
Modified Amortized Cost		0	0
Real Estate Portfolio Segment[Member] \| Construction Loans [Member]
Modified Amortized Cost		5,945
Total Payment Deferral	0	$ 339
Modified Amortized Cost, percent		0.04%
Real Estate Portfolio Segment[Member] \| Construction Loans [Member] \| Minimum [Member]
Financing Receivable, Modified, Term Extension (Month)		4 months
Term Extensions (Month)		4 months
Real Estate Portfolio Segment[Member] \| Construction Loans [Member] \| Maximum [Member]
Financing Receivable, Modified, Term Extension (Month)		5 months
Term Extensions (Month)		5 months
Real Estate Portfolio Segment[Member] \| Owner Occupied Commercial [Member]
Modified Amortized Cost		$ 13,252	$ 9,389
Total Payment Deferral	16	$ 232
Modified Amortized Cost, percent		0.10%	0.07%
Real Estate Portfolio Segment[Member] \| Owner Occupied Commercial [Member] \| Minimum [Member]
Financing Receivable, Modified, Term Extension (Month)		4 months	5 months
Term Extensions (Month)		4 months	5 months
Real Estate Portfolio Segment[Member] \| Owner Occupied Commercial [Member] \| Maximum [Member]
Financing Receivable, Modified, Term Extension (Month)		8 months	60 months
Term Extensions (Month)		8 months	60 months
Real Estate Portfolio Segment[Member] \| One to Four Family [Member]
Modified Amortized Cost		$ 402	$ 445
Financing Receivable, Modified, Term Extension (Month)		4 months
Total Payment Deferral	9	$ 17
Modified Amortized Cost, percent		0.00%	0.00%
Term Extensions (Month)		4 months
Real Estate Portfolio Segment[Member] \| One to Four Family [Member] \| Minimum [Member]
Financing Receivable, Modified, Term Extension (Month)			3 months
Term Extensions (Month)			3 months
Real Estate Portfolio Segment[Member] \| One to Four Family [Member] \| Maximum [Member]
Financing Receivable, Modified, Term Extension (Month)			121 months
Term Extensions (Month)			121 months
Real Estate Portfolio Segment[Member] \| Non-owner Occupied Commercial [Member]
Total Payment Deferral	$ 0	$ 0
Real Estate Portfolio Segment[Member] \| Extended Maturity [Member] \| Construction Loans [Member]
Modified Amortized Cost		0
Real Estate Portfolio Segment[Member] \| Extended Maturity [Member] \| Owner Occupied Commercial [Member]
Modified Amortized Cost		0	$ 3,562
Real Estate Portfolio Segment[Member] \| Extended Maturity [Member] \| One to Four Family [Member]
Modified Amortized Cost		0	175
Real Estate Portfolio Segment[Member] \| Payment Deferral [Member] \| Owner Occupied Commercial [Member] \| Maximum [Member]
Modified Amortized Cost		13,252	5,827
Real Estate Portfolio Segment[Member] \| Payment Deferral [Member] \| One to Four Family [Member]
Modified Amortized Cost		402	174
Real Estate Portfolio Segment[Member] \| Payment Deferral and Extended Maturity [Member] \| Owner Occupied Commercial [Member]
Modified Amortized Cost		0	0
Real Estate Portfolio Segment[Member] \| Payment Deferral and Extended Maturity [Member] \| One to Four Family [Member]
Modified Amortized Cost		0	0
Real Estate Portfolio Segment[Member] \| New Loan [Member] \| Construction Loans [Member]
Modified Amortized Cost		0
Real Estate Portfolio Segment[Member] \| New Loan [Member] \| Owner Occupied Commercial [Member]
Modified Amortized Cost		0	0
Real Estate Portfolio Segment[Member] \| New Loan [Member] \| One to Four Family [Member]
Modified Amortized Cost		$ 0	$ 96