SECURITIES (Amortized Cost And Fair Value Of Contractual Securities) (Details 1) (USD $)
In Thousands, unless otherwise specified |
Mar. 31, 2015
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Dec. 31, 2014
|
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Debt securities available for sale | ||
Amortized Cost | $ 299,354us-gaap_AvailableForSaleSecuritiesAmortizedCost | $ 291,403us-gaap_AvailableForSaleSecuritiesAmortizedCost |
Fair Value | 307,379us-gaap_AvailableForSaleSecurities | 298,310us-gaap_AvailableForSaleSecurities |
Debt securities held to maturity | ||
Amortized Cost | 29,126us-gaap_HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment | 29,355us-gaap_HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment |
Fair Value | 29,886us-gaap_HeldToMaturitySecuritiesFairValue | 29,974us-gaap_HeldToMaturitySecuritiesFairValue |
Due within one year [Member] | ||
Debt securities available for sale | ||
Amortized Cost |
17,111us-gaap_AvailableForSaleSecuritiesAmortizedCost / us-gaap_StatementScenarioAxis = sfbs_DueWithinOneYearMember |
16,944us-gaap_AvailableForSaleSecuritiesAmortizedCost / us-gaap_StatementScenarioAxis = sfbs_DueWithinOneYearMember |
Fair Value |
17,232us-gaap_AvailableForSaleSecurities / us-gaap_StatementScenarioAxis = sfbs_DueWithinOneYearMember |
17,246us-gaap_AvailableForSaleSecurities / us-gaap_StatementScenarioAxis = sfbs_DueWithinOneYearMember |
Due from one to five years [Member] | ||
Debt securities available for sale | ||
Amortized Cost |
126,487us-gaap_AvailableForSaleSecuritiesAmortizedCost / us-gaap_StatementScenarioAxis = sfbs_DueFromOneToFiveYearsMember |
121,591us-gaap_AvailableForSaleSecuritiesAmortizedCost / us-gaap_StatementScenarioAxis = sfbs_DueFromOneToFiveYearsMember |
Fair Value |
129,405us-gaap_AvailableForSaleSecurities / us-gaap_StatementScenarioAxis = sfbs_DueFromOneToFiveYearsMember |
123,962us-gaap_AvailableForSaleSecurities / us-gaap_StatementScenarioAxis = sfbs_DueFromOneToFiveYearsMember |
Due from five to ten years [Member] | ||
Debt securities available for sale | ||
Amortized Cost |
62,526us-gaap_AvailableForSaleSecuritiesAmortizedCost / us-gaap_StatementScenarioAxis = sfbs_FiveYearsToTenYearsMember |
60,079us-gaap_AvailableForSaleSecuritiesAmortizedCost / us-gaap_StatementScenarioAxis = sfbs_FiveYearsToTenYearsMember |
Fair Value |
64,095us-gaap_AvailableForSaleSecurities / us-gaap_StatementScenarioAxis = sfbs_FiveYearsToTenYearsMember |
61,221us-gaap_AvailableForSaleSecurities / us-gaap_StatementScenarioAxis = sfbs_FiveYearsToTenYearsMember |
Debt securities held to maturity | ||
Amortized Cost |
298us-gaap_HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment / us-gaap_StatementScenarioAxis = sfbs_FiveYearsToTenYearsMember |
298us-gaap_HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment / us-gaap_StatementScenarioAxis = sfbs_FiveYearsToTenYearsMember |
Fair Value |
322us-gaap_HeldToMaturitySecuritiesFairValue / us-gaap_StatementScenarioAxis = sfbs_FiveYearsToTenYearsMember |
325us-gaap_HeldToMaturitySecuritiesFairValue / us-gaap_StatementScenarioAxis = sfbs_FiveYearsToTenYearsMember |
Due after ten years [Member] | ||
Debt securities available for sale | ||
Amortized Cost |
350us-gaap_AvailableForSaleSecuritiesAmortizedCost / us-gaap_StatementScenarioAxis = sfbs_MoreThanTenYearsMember |
350us-gaap_AvailableForSaleSecuritiesAmortizedCost / us-gaap_StatementScenarioAxis = sfbs_MoreThanTenYearsMember |
Fair Value |
383us-gaap_AvailableForSaleSecurities / us-gaap_StatementScenarioAxis = sfbs_MoreThanTenYearsMember |
358us-gaap_AvailableForSaleSecurities / us-gaap_StatementScenarioAxis = sfbs_MoreThanTenYearsMember |
Debt securities held to maturity | ||
Amortized Cost |
5,254us-gaap_HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment / us-gaap_StatementScenarioAxis = sfbs_MoreThanTenYearsMember |
5,253us-gaap_HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment / us-gaap_StatementScenarioAxis = sfbs_MoreThanTenYearsMember |
Fair Value |
5,720us-gaap_HeldToMaturitySecuritiesFairValue / us-gaap_StatementScenarioAxis = sfbs_MoreThanTenYearsMember |
5,716us-gaap_HeldToMaturitySecuritiesFairValue / us-gaap_StatementScenarioAxis = sfbs_MoreThanTenYearsMember |
Mortgage-backed securities [Member] | ||
Debt securities available for sale | ||
Amortized Cost |
92,880us-gaap_AvailableForSaleSecuritiesAmortizedCost / us-gaap_StatementScenarioAxis = us-gaap_MortgageBackedSecuritiesMember |
92,439us-gaap_AvailableForSaleSecuritiesAmortizedCost / us-gaap_StatementScenarioAxis = us-gaap_MortgageBackedSecuritiesMember |
Fair Value |
96,264us-gaap_AvailableForSaleSecurities / us-gaap_StatementScenarioAxis = us-gaap_MortgageBackedSecuritiesMember |
95,523us-gaap_AvailableForSaleSecurities / us-gaap_StatementScenarioAxis = us-gaap_MortgageBackedSecuritiesMember |
Debt securities held to maturity | ||
Amortized Cost |
23,574us-gaap_HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment / us-gaap_StatementScenarioAxis = us-gaap_MortgageBackedSecuritiesMember |
23,804us-gaap_HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment / us-gaap_StatementScenarioAxis = us-gaap_MortgageBackedSecuritiesMember |
Fair Value |
$ 23,844us-gaap_HeldToMaturitySecuritiesFairValue / us-gaap_StatementScenarioAxis = us-gaap_MortgageBackedSecuritiesMember |
$ 23,933us-gaap_HeldToMaturitySecuritiesFairValue / us-gaap_StatementScenarioAxis = us-gaap_MortgageBackedSecuritiesMember |
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- Definition
Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before other than temporary impairment (OTTI) accretion, of investments in debt securities classified as held-to-maturity. No definition available.
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- Definition
Fair value of investments in debt securities classified as held-to-maturity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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