Document And Entity Information
ecd_TrdArrIndTitle
Trading Arrangement, Individual Title
Statistical Measurement [Axis]
ecd_TrdArrIndName
Trading Arrangement, Individual Name
Note To Financial Statement Details Textual
ecd_TrdArrExpirationDate
Trading Arrangement Expiration Date
Note 2 - Basis of Presentation
ecd_TrdArrAdoptionDate
Trading Arrangement Adoption Date
Note 4 - Share Based Compensation
Provision for income taxes
ecd_NonRule10b51ArrTrmntdFlag
Non-Rule 10b5-1 Arrangement Terminated [Flag]
Note 5 - Earnings per Share
ecd_NonRule10b51ArrAdoptedFlag
Non-Rule 10b5-1 Arrangement Adopted [Flag]
Note 7 - Commitments and Contingent Liabilities
Trading Arrangements, by Individual [Table]
Note 8 - Fair Value Disclosures and Reporting and Fair Value Measurements
Debit Card [Member]
Material Terms of Trading Arrangement [Text Block]
Note 9 - Investments
Note 10 - Loans and Allowance for Credit Losses
Financial Instrument [Axis]
Note 12 - Borrowings and Other Arrangements
Investment in Debt and Equity Securities and Other Trading Assets [Text Block]
Note 13 - Revenue Recognition
us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss
Held-to-maturity, gross unrealized losses
Note 2 - Basis of Presentation - Revision of Previously Reported Financial Statements (Details)
Held-to-maturity, gross unrealized gains
Minimum [Member]
Note 4 - Share Based Compensation - Restricted Stock Award Activity (Details)
us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
Available-for-sale, gross unrealized losses
Note 4 - Share Based Compensation - Option Activity (Details)
Available-for-sale, gross unrealized gains
Statistical Measurement [Domain]
Note 5 - Earnings per Share - Schedule of Earnings per Share (Details)
Maximum [Member]
ecd_TrdArrSecuritiesAggAvailAmt
Trading Arrangement, Securities Aggregate Available Amount
Note 7 - Commitments and Contingent Liabilities - Schedule of Off-Balance-Sheet Instruments (Details)
Note 8 - Fair Value Disclosures and Reporting and Fair Value Measurements - Fair Value of Financial Instruments (Details)
Note 8 - Fair Value Disclosures and Reporting and Fair Value Measurements - Recurring Fair Value Measurements (Details)
Note 8 - Fair Value Disclosures and Reporting and Fair Value Measurements - Level 3 Quantitative Information (Details)
Note 8 - Fair Value Disclosures and Reporting and Fair Value Measurements - Level 3 Reconciliation (Details)
Note 8 - Fair Value Disclosures and Reporting and Fair Value Measurements - Nonrecurring Fair Value Measurements (Details)
Note 9 - Investments - Schedule of Amortized Cost and Fair Value (Details)
Note 9 - Investments - Held-to-Maturity by Credit Rating (Details)
Note 9 - Investments - Unrealized Losses (Details)
Note 9 - Investments - Realized Gains/(Losses) (Details)
Note 9 - Investments - Investments by Contractual Maturity (Details)
Note 10 - Loans and Allowance for Credit Losses - Loan Distribution (Details)
Note 10 - Loans and Allowance for Credit Losses - Nonaccrual Loans (Details)
Note 10 - Loans and Allowance for Credit Losses - Collateral Dependent Loans (Details)
Business Description and Basis of Presentation [Text Block]
Note 10 - Loans and Allowance for Credit Losses - Past Due Loans (Details)
Note 10 - Loans and Allowance for Credit Losses - Modified Loans (Details)
Note 10 - Loans and Allowance for Credit Losses - Credit Quality by Vintage (Details)
Note 10 - Loans and Allowance for Credit Losses - Allowance for Credit Losses (Details)
Note 12 - Borrowings and Other Arrangements - Other Borrowings (Details)
Note 13 - Revenue Recognition - Schedule of Revenue Recognition (Details)
Notes To Financial Statements
Notes To Financial Statements [Abstract]
Debt Securities, Available-for-Sale [Table]
Exercised, weighted average exercise price (in dollars per share)
Short-term FHLB advance, percentage
Salaries and benefits
us-gaap_DividendsCash
Cash dividends
Financial Instruments [Domain]
Extended Maturity and Payment Deferral [Member]
Relating to extended maturity and payment deferral.
Dividends per share (in dollars per share)
us-gaap_SharesOutstanding
Balance (in shares)
Balance (in shares)
Twelve months or more, fair value
Less than twelve months, fair value
Award Type [Axis]
Adjustments to reconcile net income to net cash provided by operating activities:
Credit Rating, Moody's [Axis]
Plan Name [Axis]
us-gaap_Liabilities
Total liabilities
Plan Name [Domain]
us-gaap_AllocatedShareBasedCompensationExpense
Share-Based Payment Arrangement, Expense
us-gaap_LiabilitiesAndStockholdersEquity
Total liabilities and shareholders' equity
Stock based compensation expense
Share-Based Payment Arrangement [Text Block]
Decrease (increase) in short-term Federal Home Loan Bank advances
Portion at Fair Value Measurement [Member]
Reported Value Measurement [Member]
Fair Value, by Balance Sheet Grouping [Table]
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
Increase (decrease) in cash and cash equivalents
Cash and cash equivalents
Estimate of Fair Value Measurement [Member]
Schedule of Fair Value, off-Balance-Sheet Risks [Table Text Block]
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations
Beginning of period
End of period
US Government Agencies Debt Securities [Member]
Statement [Table]
Fair Value, off-Balance-Sheet Risk [Table]
us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss
Unrealized losses
Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block]
Loans held for investment, net
Total collateral dependent loans
us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Debt Instrument, Basis Spread on Variable Rate
Right-of-use assets obtained in exchange for new lease liabilities
Fair value
us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Line of Credit Facility, Maximum Borrowing Capacity
us-gaap_FinancingReceivableAllowanceForCreditLossPurchasedSeasonedLoan
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan
Number of securities
Financing Receivable, Allowance for Credit Loss [Table Text Block]
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
Unvested shares (in shares)
Unvested shares (in shares)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
Unvested shares, weighted average grant date fair value (in dollars per share)
Unvested shares, weighted average grant date fair value (in dollars per share)
Granted shares (in shares)
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)
Financing Receivable, Past Due [Table Text Block]
Granted, weighted average grant date fair value (in dollars per share)
us-gaap_SecuritiesLoanedOrSoldUnderAgreementsToRepurchaseFairValueDisclosure
Repurchase agreements
Long-Term Debt, Type [Axis]
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
Forfeited shares (in shares)
Financing Receivable Credit Quality Indicators [Table Text Block]
us-gaap_EquitySecuritiesFvNiGainLoss
Increase in value of restricted bank equity securities
Error Correction [Table]
Financing Receivable, Modified [Table Text Block]
Product and Service [Domain]
Product and Service [Axis]
us-gaap_LineOfCredit
Long-Term Line of Credit
Vested, weighted average grant date fair value (in dollars per share)
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount
Unrealized gain recognized on equity investments
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
Vested shares (in shares)
Collateralized Mortgage Obligations [Member]
Revision of Prior Period [Domain]
Revision of Prior Period [Axis]
Asset Class [Axis]
Exercised, aggregate intrinsic value
Loans, including fees
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)
Commitments to Extend Credit [Member]
Exercisable (in shares)
us-gaap_LoansAndLeasesReceivableImpairedCommitmentToLend
Financing Receivable, Modified, Commitment to Lend
Exercisable, weighted average exercise price (in dollars per share)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number (in shares)
Outstanding (in shares)
Outstanding (in shares)
Measurement Frequency [Axis]
Commitments and Contingencies Disclosure [Text Block]
Proceeds from sales, calls and maturities of securities available for sale
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
Outstanding, weighted average exercise price (in dollars per share)
Outstanding, weighted average exercise price (in dollars per share)
Statement [Line Items]
Liability Class [Axis]
Outstanding, aggregate intrinsic value
Fair Value Hierarchy and NAV [Axis]
Common stock, shares issued (in shares)
Common stock, shares outstanding (in shares)
Award Type [Domain]
Common stock, shares authorized (in shares)
Earnings on separate account life insurance
Represents the amount of earnings on separate account life insurance.
Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table]
Common stock, no par value; 24,000,000 shares authorized; 12,966,397 and 13,273,788 shares issued and outstanding at September 30, 2026 and December 31, 2025, respectively
us-gaap_AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization
Investment Program, Proportional Amortization Method, Applied, Amortization Expense
us-gaap_AmortizationMethodQualifiedAffordableHousingProjectInvestments
Investment, Proportional Amortization Method, Elected, Amount
Proceeds from BOLI death benefit
us-gaap_MortgageLoansInProcessOfForeclosureAmount
Mortgage Loans in Process of Foreclosure, Amount
Short-Term Debt, Type [Domain]
us-gaap_QualifiedAffordableHousingProjectInvestmentsCommitment
Investment Program, Proportional Amortization Method, Elected, Commitment
us-gaap_PolicyTextBlockAbstract
Accounting Policies
us-gaap_AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount
Investment Program, Proportional Amortization Method, Elected, Income Tax Credit and Other Income Tax Benefit, before Amortization Expense
us-gaap_DisclosureTextBlockAbstract
Notes to Financial Statements
us-gaap_AffordableHousingProjectInvestmentWriteDownAmount
Investment Program, Proportional Amortization Method, Elected, Impairment Loss
us-gaap_TableTextBlock
Notes Tables
Comprehensive Income (Loss) Note [Text Block]
Short-Term Debt, Type [Axis]
Liquidation of bank-owned life insurance
us-gaap_ComprehensiveIncomeNetOfTax
Comprehensive (loss) income
Federal reserve discount window, percentage
Overnight Fed funds purchased
Federal Funds Purchased
Federal reserve discount window
us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresMaximumAmountAvailable
Federal Home Loan Bank, Advances, General Debt Obligations, Maximum Amount Available
Long-term FHLB advance
Maturities and calls of debt securities available-for-sale
Maturities and calls of debt securities held-to-maturity
Outstanding, weighted average remaining contractual term (Year)
Fair Value, Assets Measured on Recurring Basis [Table Text Block]
us-gaap_DepositsFairValueDisclosure
Deposits
Net amortization of variable interest entities
Represents the amount of amortization of variable interest entities during the period.
bsrr_IncreaseDecreaseInInterestReceivableAndOtherOperatingAssets
(Increase) decrease in interest receivable and other assets
Amount of increase (decrease) in interest receivable and other operating assets.
Exercisable, weighted average remaining contractual term (Year)
bsrr_AccretionAmortizationOfDiscountsAndPremiumsAcquiredLoans
Net accretion of premiums/discounts for loans acquired
The sum of the periodic adjustments of the differences between securities' face values and purchase prices that are charged against earnings for loans acquired.
us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue
Balance of recurring Level 3 assets at January 1,
Balance of recurring Level 3 assets at September 30,
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
Principal paydowns on debt securities held-to-maturity
The cash inflow from paydown of debt securities classified as held to maturity.
Short-term FHLB advance
Goodwill [Text Block]
bsrr_PaymentToAcquireSplitDollarLifeInsurancePolicyInvestingActivities
Purchase of split dollar life insurance policies
Amount of cash outflow for payment of premium on corporate-owned split dollar life insurance policy, classified as investing activities.
Federal Home Loan Bank Advances [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table]
Principal paydowns on debt securities available-for-sale
Amount of cash inflow from paydowns on debt securities classified as available for sale.
us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations
Subordinated debentures
The 2007 Plan [Member]
Relating to the 2007 plan.
The 2023 Plan [Member]
Relating to the 2023 plan.
The 2017 Plan [Member]
Relating to the 2017 plan.
Proceeds from sale of premises and equipment
Federal Home Loan Bank, Advance, Branch of FHLBank [Table]
bsrr_NumberOfBranches
Number of Branches
Represents the number of branches operated.
Standby Letters of Credit [Member]
Proceeds from sales of foreclosed assets
Payment Deferral [Member]
Other comprehensive (loss) income, net of tax:
Statement of Stockholders' Equity [Abstract]
Extended Maturity [Member]
Principal Forgiveness [Member]
Statement of Comprehensive Income [Abstract]
Loan Restructuring Modification [Axis]
us-gaap_OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent
Tax effect
Loan Restructuring Modification [Domain]
Statement of Cash Flows [Abstract]
Financing Receivable Portfolio Segment [Axis]
Other comprehensive income, net of tax
Other comprehensive (loss) income, net of tax
Long-Term Debt, Type [Domain]
Shareholders' equity
Equity Components [Axis]
Real Estate Loan [Member]
Financing Receivable Portfolio Segment [Domain]
Stock options exercised
Equity Component [Domain]
Fair Value Measurements, Nonrecurring [Table Text Block]
Fair Value, Inputs, Level 2 [Member]
Fair Value, Inputs, Level 3 [Member]
Fair Value, Inputs, Level 1 [Member]
AOCI Attributable to Parent [Member]
Additional Paid-in Capital [Member]
Corporate Debt Securities [Member]
Retained Earnings [Member]
Subordinated Debt [Member]
Financial Asset, Aging [Axis]
Long-term debt
Subordinated Debt
Premises and equipment, net
Financing Receivable, Nonaccrual [Table Text Block]
us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss
Loans, amortized cost basis
Loans
Financial Asset, Aging [Domain]
Held-to-maturity, amortized cost
us-gaap_DebtSecuritiesHeldToMaturityExcludingAccruedInterestBeforeAllowanceForCreditLoss
Total
Financial Asset, 30 to 59 Days Past Due [Member]
Available-for-sale, amortized cost
Total
Held-to-maturity, allowance for credit losses
Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Excluding Accrued Interest
Held-to-maturity, allowance for credit losses
us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest
Allowance for credit losses on loans
Balance
Balance
Financial Asset, 60 to 89 Days Past Due [Member]
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Available-for-sale, allowance for credit losses
Available-for-sale, allowance for credit losses
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest
Share-Based Payment Arrangement, Option, Activity [Table Text Block]
Originated four years prior
Originated years prior
Originated two years prior
Originated three years prior
Fair Value Disclosures [Text Block]
Originated current year
Fair Value, by Balance Sheet Grouping [Table Text Block]
Originated prior year
Supplemental disclosure of cash flow information:
Revolving
Revolving converted to term
us-gaap_DebtInstrumentVariableInterestRateTypeExtensibleEnumeration
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]
us-gaap_ExciseTaxesCollected
Excise tax on stock repurchases
us-gaap_LettersOfCreditOutstandingAmount
Letters of Credit Outstanding, Amount
Secured Overnight Financing Rate (SOFR) [Member]
us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments
Net accretion on securities premiums and discounts
us-gaap_LongTermDebtFairValue
Long-term debt, net
Collateral Held [Domain]
Forfeited/Expired (in shares)
Collateral Held [Axis]
Subordinated debentures
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust
Other Commitments [Table]
Net gain (loss) on sale of fixed assets
(Gain) loss on disposal of fixed assets
us-gaap_PaymentsToAcquireLifeInsurancePolicies
Purchase of bank-owned life insurance
Stock based compensation - restricted stock
Common stock, no par value (in dollars per share)
Accumulated other comprehensive loss, net
Stock based compensation - stock options
us-gaap_PaymentsToAcquireInterestInSubsidiariesAndAffiliates
Capital contributions to partnership investments
Forfeited/Expired, weighted average exercise price (in dollars per share)
Stock options exercised, net of shares surrendered for cashless exercises
Basis of Accounting [Text Block]
us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Income before taxes
Additional paid-in capital
Debt Disclosure [Text Block]
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)
Restricted stock vested in period
us-gaap_Capital
Banking Regulation, Total Capital, Actual
us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Purchases of premises and equipment
Collateral Pledged [Member]
Collateralized Mortgage-Backed Securities [Member]
us-gaap_DebtInstrumentFairValue
Other borrowings
Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table]
us-gaap_StockRepurchasedAndRetiredDuringPeriodValue
Stock repurchase
us-gaap_NoninterestExpense
Total noninterest expense
Noninterest expense
us-gaap_FinancingReceivableTroubledDebtRestructuringIncreaseDecreaseFromModification
Principal forgiveness
Total other borrowings
Schedule of Debt [Table Text Block]
Financial Asset, Not Past Due [Member]
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Table Text Block]
Fair Value, Recurring and Nonrecurring [Table]
us-gaap_InvestmentTaxCredit
Investment Tax Credit
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Table]
Goodwill [Table]
Allowance for credit losses on unfunded loan commitments
Debt Instrument, Name [Domain]
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]
Stock options exercised, net of shares surrendered for cashless exercises (in shares)
Exercised (in shares)
us-gaap_DebtInstrumentInterestRateStatedPercentage
Debt Instrument, Interest Rate, Stated Percentage
Fair Value Measurement Inputs and Valuation Techniques [Table]
us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited
Restricted stock forfeited / cancelled (in shares)
Restricted stock granted (in shares)
us-gaap_StockRepurchasedAndRetiredDuringPeriodShares
Stock repurchase (in shares)
us-gaap_UnusedCommitmentsToExtendCredit
Unused Commitments to Extend Credit
Schedule of Long-Term Debt Instruments [Table]
Other Service Charges on Deposits [Member]
Relating to other service charges on deposits.
Debt Instrument [Axis]
Percentage of noninterest income not within scope of ASC 606.
Represents the percentage of revenue not within ASC 606.
Returned Item and Overdraft Fees [Member]
Relating to returned item and overdraft fees.
Cash flows from operating activities:
Cash flows from investing activities:
us-gaap_NetCashProvidedByUsedInOperatingActivities
Net cash provided by operating activities
Cash flows from financing activities:
us-gaap_NetCashProvidedByUsedInInvestingActivities
Net cash provided by (used in) investing activities
us-gaap_NetCashProvidedByUsedInFinancingActivities
Net cash (used in) provided by financing activities
us-gaap_AdvancesFromFederalHomeLoanBanks
Advance from Federal Home Loan Bank
us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt
Purchases of debt securities available-for-sale
Realized Gain (Loss) on Investments [Table Text Block]
us-gaap_AssetsFairValueDisclosure
Total assets measured on a nonrecurring basis
us-gaap_IncreaseDecreaseInFederalFundsPurchased
(Decrease) increase in Fed funds purchased
us-gaap_GoodwillImpairmentLoss
Goodwill, Impairment Loss
Increase in deposits
Accounting Policies [Abstract]
Accounting Standards Update and Change in Accounting Principle [Text Block]
US States and Political Subdivisions Debt Securities [Member]
us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss
Net loans
Credit loss benefit - debt securities held-to-maturity
Measurement Input, Appraised Value [Member]
bsrr_ForeclosedAssetsMeasurementInput
Foreclosed Assets, Measurement Input
Value of input used to measure foreclosed assets.
Measurement Input, Market Trends and Selling and Commission Costs [Member]
Measurement input using market trends and selling and commission costs.
Measurement Input Type [Axis]
us-gaap_PaymentsForProceedsFromLoansAndLeases
Loan (originations) and payments, net
Income Statement [Abstract]
Real estate acquired through foreclosure
Value of the real estate acquired through foreclosure classified as noncash investing and financing activities.
bsrr_IncomeTaxExpenseBenefitInvestments
Income Tax Expense (Benefit), Investments
Amount of income tax expense (benefit) for investments.
bsrr_OtherTaxBenefitsInvestments
Other Tax Benefits, Investments
Amount of other tax benefits for investments.
Credit loss expense (benefit) - unfunded commitments
bsrr_InvestmentAmortizationExpense
Investment Amortization Expense
Amount of amortization on investments.
Available-for-sale, net of zero allowance for credit losses
Total available-for-sale securities
Total
us-gaap_NumberOfReportableSegments
Number of Reportable Segments
Held-to-maturity, net of allowance for credit losses of $14 and $15
Debt Securities, Held-to-Maturity, Excluding Accrued Interest, after Allowance for Credit Loss
Deferred income tax provision
Federal Reserve Discount Window [Member]
Represents the federal reserve discount window.
(Decrease) increase in customer repurchase agreements
Non Seasoned Loans [Member]
Represents the non seasoned loans.
Seasoned Loans [Member]
Relating to the seasoned loans.
bsrr_ShareRepurchaseProgramExciseTaxAfterImpactFromCompensationPlans
Excise tax on stock repurchased
The amount of excise tax on the stock repurchase program after impact from compensation plans.
Net income
Net income
Financial Asset, Past Due [Member]
Kevin McPhaill [Member]
Related to Kevin McPhaill.
Amortization of debt issuance costs
Foreclosed assets
Foreclosed assets
Amortization of core deposit intangible
Measurement Input Type [Domain]
us-gaap_InterestIncomeExpenseNet
Net interest income
us-gaap_ShareRepurchaseProgramExciseTax
Excise tax on stock repurchase
Accumulated Other Comprehensive Income (Loss) [Table]
Restricted Stock [Member]
us-gaap_FinancingReceivableNonaccrualInterestIncome
Financing Receivable, Nonaccrual, Interest Income
Accounting Standards Update and Change in Accounting Principle [Table]
Subordinated debentures
us-gaap_InterestExpenseJuniorSubordinatedDebentures
Occupancy and equipment
Other
us-gaap_FinancingReceivablePurchasedWithCreditDeteriorationAmountAtParValue
Financing Receivable, Purchased with Credit Deterioration, Amount at Par Value
us-gaap_LifeInsuranceCorporateOrBankOwnedChangeInValue
Increase in cash surrender value of life insurance policies
Increase in cash surrender value of life insurance
us-gaap_NoninterestIncome
Total noninterest income
Noninterest income
Measurement Basis [Axis]
Other income
Fair Value Hierarchy and NAV [Domain]
us-gaap_NoninterestIncomeOther
Other(1)
Measurement Frequency [Domain]
us-gaap_RepaymentsOfLongTermDebt
Repayments on Federal Home Loan Bank advances and other debt
Statement of Financial Position [Abstract]
Provision for credit losses on loans
Credit loss (benefit) expense - loans
Included in other comprehensive income
Income taxes paid
Recoveries
Other assets
us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff
Charge-offs
Current period gross charge-offs
Fair Value, Nonrecurring [Member]
Fair Value, Recurring [Member]
us-gaap_PaymentsForProceedsFromFederalHomeLoanBankStock
Net purchases of FHLB stock
us-gaap_PaymentsForRepurchaseOfCommonStock
Repurchase of common stock, net
Document Type
Maturing after five years through ten years, amortized cost, held-to-maturity
Farmland [Member]
Relating to farmland.
Other Commercial [Member]
Relating to other commercial.
Maturing after ten years, amortized cost, held-to-maturity
Document Information [Line Items]
Document Quarterly Report
Maturing within one year, amortized cost, held-to-maturity
bsrr_CollateralDependentLoansMeasurementInput
Collateral Dependent Loans, Measurement Input
Value of input used to measure collateral dependent loans.
Maturing after one year through five years, amortized cost, held-to-maturity
Document Information [Table]
Anti dilutive equity awards (in shares)
Not Rated [Member]
Relating to investments not rated.
Diluted Earnings Per Share
Effect of dilutive equity awards (in shares)
Entity Interactive Data Current
US States and Political Subdivisions Debt Securities, Excluding Prerefunded and Escrowed to Maturity [Member]
Bonds or similar securities issued by state, city, or local US governments or the agencies operated by state, city, or local governments. Debt securities issued by state governments may include bond issuances of US state authorities including, for example, but not limited to, housing authorities, dormitory authorities, and general obligations while debt securities issued by political subdivisions of US states would include, for example, debt issuances by county, borough, city, or municipal governments.
Bank-owned life insurance
Document Transition Report
us-gaap_IncreaseDecreaseInFinanceReceivables
Increase (Decrease) in Finance Receivables
Average shares outstanding, diluted (in shares)
bsrr_DebtSecuritiesHeldtomaturityAmortizedCostUnrealizedLossesTransfersInAmount
Debt Securities, Held-to-Maturity, Amortized Cost, Unrealized Losses, Transfers In, Amount
Amount of unrealized losses transferred from investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) and net income (trading) to investment in debt security measured at amortized cost (held-to-maturity) at period end.
Low-Income Housing Tax Credit (“LIHTC”) Fund Investments [Member]
Relating to Low-Income Housing Tax Credit (“LIHTC”) Fund Investments.
Basic Earnings Per Share
Without single maturity date, amortized cost, held-to-maturity
Correspondent Bank Lines of Credit [Member]
Relating to correspondent bank lines of credit.
PER SHARE DATA
Federal Reserve Line of Credit [Member]
Relating to the federal reserve line of credit.
Average shares outstanding, basic (in shares)
Earnings per share basic (in dollars per share)
Nonaccrual, 90 days accruing
Earnings Per Share, Basic, by Common Class, Including Two-Class Method [Table]
No allowance
Long-term FHLB advance, percentage
Weighted average interest rate on advances made and reported by Federal Home Loan Bank (FHLBank) maturing after fiscal year end.
Nonaccrual
Overnight Fed funds purchased, percentage
Weighted average interest rate on overnight federal funds purchased.
Interest-bearing
us-gaap_Deposits
Deposits
Total deposits
Deposits:
Initial allowance on purchased seasoned loans
bsrr_FinancingReceivableNonaccrualReversalOfAccruedInterest
Financing Receivable, Nonaccrual, Reversal of Accrued Interest
Amount of accrued interest reversed due to loans entering nonaccrual status during the period.
bsrr_FinancingReceivableLoantovalueRatio
Financing Receivable, Loan-to-Value Ratio
Represents the loan-to-value ratio on financing receivables.
Other intangible assets, net
bsrr_FinancingReceivableNonaccrualInterestIncomeIfAccruing
Financing Receivable, Nonaccrual, Interest Income if Accruing
Amount of interest income that would be received if not nonaccrual on financing receivable on nonaccrual status.
Loans provided for sales of real estate owned
us-gaap_GoodwillAcquiredDuringPeriod
Goodwill, Acquired During Period
Noninterest-bearing
Revision of Prior Period, Adjustment [Member]
Document Fiscal Period Focus
With allowance
Amortized cost excluding accrued interest, of financing receivable on nonaccrual status with allowance for credit loss. Excludes net investment in lease.
Document Fiscal Year Focus
Investment, Name [Domain]
Schedule of Collateral Dependent Loans [Table Text Block]
The tabular disclosure of collateral dependent loans.
Other Construction/Land [Member]
Relating to other construction/land.
Mortgage Warehouse Facilities [Member]
Relating to mortgage warehouse facilities.
Amendment Flag
bsrr_PeerGroupAssetSize
Peer Group, Asset Size
Represents the asset size of the peer group.
Financing Receivables [Text Block]
Common Stock [Member]
Financing Receivable, Past Due [Table]
Net deferred loan (fees)
Deferred loan costs, net
Goodwill
Goodwill
Gross gains on sales, calls and maturities of securities available for sale
Commercial & Industrial [Member]
Relating to commercial & industrial.
Increase (decrease) in other liabilities
Farmland & Agriculture Production [Member]
Relating to farmland & agriculture production.
Document Period End Date
Investment [Table Text Block]
Interest and dividend income
bsrr_DebtSecuritiesExcludingAccruedInterest
Total investment securities
Amount, after allowance for credit loss, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), investment in debt security measured at amortized cost (held-to-maturity), and investment in debt security measured at fair value with change in fair value recognized in net income (trading).
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)
Residential Portfolio Segment [Member]
Legal Entity [Axis]
Unrealized holding (loss) gain arising during period, tax
us-gaap_InterestAndDividendIncomeOperating
Total interest income
Securities held-to-maturity, net
Fair value of investment in debt security measured at amortized cost (held-to-maturity).
Consumer Portfolio Segment [Member]
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Table]
Individual evaluated, amortized cost
Entity File Number
Entity Tax Identification Number
Supplemental schedule of noncash investing and financing activities:
Disaggregation of Revenue [Table Text Block]
us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
Less than twelve months, unrealized losses
Disaggregation of Revenue [Table]
us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
Twelve months or more, unrealized losses
Entity [Domain]
Entity Central Index Key
Entity Registrant Name
Unrealized holding (loss) gain arising during period
Entity Current Reporting Status
Gross losses on sales, calls and maturities of securities available for sale
Special Mention [Member]
us-gaap_DebtSecuritiesAvailableForSaleRealizedGainLoss
Available-for-sale, realized gain (loss)
Substandard [Member]
Entity Incorporation, State or Country Code
Pass [Member]
Current Fiscal Year End Date
us-gaap_FinancingReceivableSignificantPurchases
Financing Receivable, Purchase
Entity Filer Category
Entity Shell Company
Entity Emerging Growth Company
Net gain on sale of securities available-for-sale
Gain on sales of securities
Net gain (loss) on sale of securities available for sale
Entity Small Business
Financing Receivable, Modified [Table]
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Interest-bearing deposits in banks
Deposits
Entity Address, State or Province
Investment securities
Entity Address, City or Town
Marketable Securities [Table]
us-gaap_InterestExpenseOperating
Total interest expense
Retained earnings
Entity Address, Address Line One
City Area Code
Maturing after one year through five years, amortized cost, available-for-sale
Maturing after five years through ten years, amortized cost, available-for-sale
Interest expense
Local Phone Number
Maturing within one year, amortized cost, available-for-sale
Revenue from Contract with Customer [Text Block]
Entity Address, Postal Zip Code
Other borrowings
Total other borrowings
Without single maturity date, fair value, available-for-sale
Title of 12(b) Security
Security Exchange Name
Maturing after five years through ten years, fair value, available-for-sale
Trading Symbol
Maturing after ten years, fair value, available-for-sale
Maturing within one year, fair value, available-for-sale
Maturing after one year through five years, fair value, available-for-sale
Maturing after ten years, amortized cost, available-for-sale
Without single maturity date, amortized cost, available-for-sale
Class of Stock [Axis]
Federal Home Loan Bank advances
Class of Financing Receivable [Axis]
Class of Financing Receivable [Domain]
Variable Rate [Domain]
Federal funds purchased and repurchase agreements
Entity Common Stock, Shares Outstanding
Earnings Per Share [Text Block]
Financing Receivable, Credit Quality Indicator [Table]
Subtotal
Gross loans
Internal Credit Assessment [Axis]
off-Balance-Sheet Risks, Amount, Liability
Federal funds sold and other
us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss
Net interest income after credit loss expense
Held-to-maturity, fair value
us-gaap_HeldToMaturitySecuritiesFairValue
Total, fair value, held-to-maturity
Long-term debt
us-gaap_InterestExpenseSubordinatedNotesAndDebentures
Purchases
Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]
Investments Classified by Contractual Maturity Date [Table Text Block]
Exercisable, aggregate intrinsic value
Internal Credit Assessment [Domain]
Maturing after five years through ten years, fair value, held-to-maturity
Investment, Name [Axis]
Maturing after ten years, fair value, held-to-maturity
Taxable securities
Maturing within one year, fair value, held-to-maturity
Maturing after one year through five years, fair value, held-to-maturity
Other liabilities
Individual evaluated, reserves
Tax-exempt securities
Previously Reported [Member]
us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3
Transfers out of Level 3
Without single maturity date, fair value, held-to-maturity
Reclassification adjustment for gains included in net income, tax
Cash and due from banks
us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax
Less: reclassification adjustment for gains included in net income
us-gaap_Assets
Assets
Total assets
us-gaap_CashAndCashEquivalentsAtCarryingValue
Total cash & cash equivalents
Financing Receivable, Nonaccrual [Table]
Modified
Modified, percentage
Earnings per share diluted (in dollars per share)
us-gaap_FinancingReceivableExcludingAccruedInterestModifiedSubsequentDefault
Financing Receivable, Excluding Accrued Interest, Modified, Subsequent Default
Weighted average interest rate reduction
Other Borrowings [Member]
Relating to other borrowings.
External Credit Rating, Moody's [Domain]
Depreciation and amortization
Asset Class [Domain]
us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation
Restricted shares withheld for taxes
Weighted average term extension (Year)
Accounts and Financing Receivables [Table]
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
Fair Value by Liability Class [Domain]
Dividends on equity investments
Interest paid
Extended Maturity and Principal Forgiveness [Member]
Individual [Axis]
Originated years prior, charge-offs
Revolving, charge-offs
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number (in shares)
Originated three years prior, charge-offs
Originated four years prior, charge-offs
Originated prior year, charge-offs
All Individuals [Member]
Originated two years prior, charge-offs
Extended Maturity and Interest Rate Reduction [Member]
Originated current year, charge-offs
Repurchase agreements
Securities Sold under Agreements to Repurchase
Schedule of Error Corrections and Prior Period Adjustments [Table Text Block]
Revolving converted to term, gross charge-offs
us-gaap_DebtSecuritiesHeldToMaturityAccruedInterestAfterAllowanceForCreditLoss
Debt Securities, Held-to-Maturity, Accrued Interest, after Allowance for Credit Loss
us-gaap_StockholdersEquity
Total shareholders' equity
Balance
Balance
Forfeited, weighted average grant date fair value (in dollars per share)
Moody's, A2 Rating [Member]
us-gaap_FinancingReceivableAccruedInterestAfterAllowanceForCreditLoss
Financing Receivable, Accrued Interest, after Allowance for Credit Loss
Moody's, Aaa Rating [Member]
Moody's, Aa1 Rating [Member]
Loans, net:
us-gaap_PaymentsOfDividends
Cash dividends paid
Consolidation, Less-than-Wholly-Owned Subsidiary, Parent Ownership Interest, Effect of Change [Table]
Financial Service [Member]
us-gaap_DebtSecuritiesAvailableForSaleAccruedInterestAfterAllowanceForCreditLoss
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss
Insider Trading Arrangements [Table]
ecd_Rule10b51ArrTrmntdFlag
Rule 10b5-1 Arrangement Terminated [Flag]
Noninterest income
Service charges and fees on deposit accounts
ecd_Rule10b51ArrAdoptedFlag
Rule 10b5-1 Arrangement Adopted [Flag]
Commitments and contingent liabilities (Note 7)