ServisFirst Bancshares, Inc. Quarterly report [Sections 13 or 15(d)]

Quarterly report [Sections 13 or 15(d)]

Note 12 - Fair Value Measurement - Financial Assets and Liabilities Carried at Fair Value on Recurring Basis or Nonrecurring Basis (Details)

Note 12 - Fair Value Measurement - Financial Assets and Liabilities Carried at Fair Value on Recurring Basis or Nonrecurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Dec. 31, 2025
Cash and due from banks	$ 122,417	$ 95,127
Interest-bearing balances due from depository institutions	11,177,097	11,534,762
Federal funds sold	25,101	6,052
Held to maturity debt securities	594,596	660,076
Mortgage loans held for sale	15,273	11,744
Restricted equity securities	12,475	12,203
Federal funds purchased	1,965,000	1,471,628
US Treasury Securities [Member]
Held to maturity debt securities	224,785	249,621
Reported Value Measurement [Member]
Cash and due from banks	122,417	95,127
Interest-bearing balances due from depository institutions	738,547	1,026,607
Securities purchased with agreement to resell	298,950	498,910
Federal funds sold	25,101	6,052
Held to maturity debt securities	369,811	410,455
Mortgage loans held for sale	15,273	11,744
Restricted equity securities	12,475	12,203
Loans, net	14,548,293	13,525,229
Deposits	14,087,378	14,219,034
Federal funds purchased	1,965,000	1,471,628
Other borrowings	34,750	34,750
Reported Value Measurement [Member] \| US Treasury Securities [Member]
Held to maturity debt securities	224,785	249,621
Estimate of Fair Value Measurement [Member]
Cash and due from banks	122,417	95,127
Interest-bearing balances due from depository institutions	738,547	1,026,607
Securities purchased with agreement to resell	298,950	498,910
Federal funds sold	25,101	6,052
Held to maturity debt securities	317,668	376,503
Mortgage loans held for sale	15,273	11,744
Restricted equity securities	12,475	12,203
Loans, net	14,433,136	13,267,169
Deposits	14,081,830	14,217,711
Federal funds purchased	1,965,000	1,471,628
Other borrowings	31,734	31,258
Estimate of Fair Value Measurement [Member] \| US Treasury Securities [Member]
Held to maturity debt securities	215,437	240,032
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 1 [Member]
Cash and due from banks	122,417	95,127
Interest-bearing balances due from depository institutions	738,547	1,026,607
Securities purchased with agreement to resell	298,950	498,910
Federal funds sold	0	0
Mortgage loans held for sale	0	0
Restricted equity securities	0	0
Loans, net	0	0
Deposits	0	0
Federal funds purchased	0	0
Other borrowings	0	0
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 1 [Member] \| US Treasury Securities [Member]
Held to maturity debt securities	215,437	240,032
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 2 [Member]
Cash and due from banks	0	0
Interest-bearing balances due from depository institutions	0	0
Securities purchased with agreement to resell	0	0
Federal funds sold	25,101	6,052
Held to maturity debt securities	316,168	376,003
Mortgage loans held for sale	15,273	11,744
Restricted equity securities	12,475	12,203
Loans, net	0	0
Deposits	14,081,830	14,217,711
Federal funds purchased	1,965,000	1,471,628
Other borrowings	31,734	31,258
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 3 [Member]
Cash and due from banks	0	0
Interest-bearing balances due from depository institutions	0	0
Securities purchased with agreement to resell	0	0
Federal funds sold	0	0
Held to maturity debt securities	1,500	500
Mortgage loans held for sale	0	0
Restricted equity securities	0	0
Loans, net	14,433,136	13,267,169
Deposits	0	0
Federal funds purchased	0	0
Other borrowings	$ 0	$ 0