$STEL
Stellar Bancorp Inc Stock $stel

$stel Overview Financials Valuation SEC Filings Company Website

2023 Q1 Form 10-K Financial Statement

#000147384423000013 Filed on March 15, 2023

Income Statement

Concept	2023 Q1	2022 Q4	2022
Revenue	$140.4M		$323.0M
YoY Change	312.8%		144.52%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$8.700M	$11.80M	$5.000M
YoY Change	935.71%	1023.81%	42.86%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$24.59M		$34.04M
YoY Change	1675.31%		474.35%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$47.06M	$1.800M	$62.52M
YoY Change	265.61%	39.53%	37.36%
Income Tax	$9.900M	-$200.0K	$11.09M
% Of Pretax Income	21.04%	-11.11%	17.74%
Net Earnings	$37.15M	$2.100M	$51.43M
YoY Change	250.62%	-481.82%	44.48%
Net Earnings / Revenue	26.46%		15.92%
Basic Earnings Per Share	$0.70		$1.48
Diluted Earnings Per Share	$0.70	$0.04	$1.47
COMMON SHARES
Basic Shares Outstanding	52.97M shares	52.30M	34.74M shares
Diluted Shares Outstanding	53.14M shares		35.01M shares

Balance Sheet

Concept	2023 Q1	2022 Q4	2022
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$263.3M	$371.7M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$124.7M	$126.8M	$127.0M
YoY Change	120.11%	117.07%	82.47%
Goodwill	$497.3M	$497.3M
YoY Change	513.9%	513.9%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$10.60B	$10.90B	$10.90B
YoY Change	138.52%	142.99%	142.98%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$4.000M	$2.000M	$2.000M
YoY Change
Accrued Expenses	$22.00M	$23.00M	$23.00M
YoY Change	59.42%	63.12%	63.12%
Deferred Revenue
YoY Change
Short-Term Debt
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$26.00M	$25.00M	$25.00M
YoY Change	85.71%	78.57%	78.57%
LONG-TERM LIABILITIES
Long-Term Debt	$348.0M	$173.0M	$173.0M
YoY Change
Other Long-Term Liabilities	$45.00M	$51.00M	$51.00M
YoY Change	111.27%	78.95%	78.95%
Total Long-Term Liabilities	$393.0M	$224.0M	$224.0M
YoY Change	1745.07%	685.96%	685.96%
TOTAL LIABILITIES
Total Short-Term Liabilities	$26.00M	$25.00M	$25.00M
Total Long-Term Liabilities	$393.0M	$224.0M	$224.0M
Total Liabilities	$9.159B	$9.517B	$9.517B
YoY Change	134.46%	142.55%	142.54%
SHAREHOLDERS EQUITY
Retained Earnings	$333.4M	$303.1M
YoY Change	36.25%	27.82%
Common Stock	$533.0K	$530.0K
YoY Change	110.67%	109.49%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$1.446B	$1.383B	$1.383B
YoY Change
Total Liabilities & Shareholders Equity	$10.60B	$10.90B	$10.90B
YoY Change	138.52%	142.99%	142.98%

Cashflow Statement

Concept	2023 Q1	2022 Q4	2022
OPERATING ACTIVITIES
Net Income	$37.15M	$2.100M	$51.43M
YoY Change	250.62%	-481.82%	44.48%
Depreciation, Depletion And Amortization	$8.700M	$11.80M	$5.000M
YoY Change	935.71%	1023.81%	42.86%
Cash From Operating Activities	$49.02M	$69.40M	$109.1M
YoY Change	653.64%	-444.08%	213.31%
INVESTING ACTIVITIES
Capital Expenditures	$1.238M	$2.900M	$3.811M
YoY Change	-615.83%	-5900.0%	-601.45%
Acquisitions
YoY Change
Other Investing Activities	$204.3M	$514.1M	$77.60M
YoY Change	-218.75%	-258.38%	-158.26%
Cash From Investing Activities	$203.0M	$511.1M	$73.76M
YoY Change	-217.85%	-257.44%	-155.06%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net			$23.61M
YoY Change			305.24%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-$360.4M	-386.5M	-$568.6M
YoY Change	2594.29%	-230.5%	-211.22%
NET CHANGE
Cash From Operating Activities	$49.02M	69.40M	$109.1M
Cash From Investing Activities	$203.0M	511.1M	$73.76M
Cash From Financing Activities	-$360.4M	-386.5M	-$568.6M
Net Change In Cash	-$108.4M	194.0M	-$385.8M
YoY Change	-39.51%	-498.85%	-193.61%
FREE CASH FLOW
Cash From Operating Activities	$49.02M	$69.40M	$109.1M
Capital Expenditures	$1.238M	$2.900M	$3.811M
Free Cash Flow	$47.78M	$66.50M	$105.3M
YoY Change	608.47%	-430.52%	195.9%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2021	us-gaap	Other Revenue Expense From Real Estate Operations OtherRevenueExpenseFromRealEstateOperations	-548000	usd
CY2020	us-gaap	Other Revenue Expense From Real Estate Operations OtherRevenueExpenseFromRealEstateOperations	-5162000	usd
CY2022	us-gaap	Business Combination Integration Related Costs BusinessCombinationIntegrationRelatedCosts	24138000	usd
CY2021	us-gaap	Business Combination Integration Related Costs BusinessCombinationIntegrationRelatedCosts	2011000	usd
CY2022	us-gaap	Other Noninterest Expense OtherNoninterestExpense	15332000	usd
CY2021	us-gaap	Other Noninterest Expense OtherNoninterestExpense	11732000	usd
CY2022	us-gaap	Noninterest Expense NoninterestExpense	196076000	usd
CY2021	us-gaap	Noninterest Expense NoninterestExpense	139554000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	62524000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	99894000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	11092000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	18341000	usd
CY2022	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	51432000	usd
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	81553000	usd
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.48
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.85
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.47
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.82
CY2022	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.43
CY2021	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.34
CY2022	us-gaap	Net Income Loss NetIncomeLoss	51432000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	81553000	usd
CY2022	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-203214000	usd
CY2021	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-21696000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	1218000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	49000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTaxParent	0	usd
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTaxParent	1477000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Reclassification For Discontinuance Before Tax OtherComprehensiveIncomeLossCashFlowHedgeReclassificationForDiscontinuanceBeforeTax	0	usd
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Reclassification For Discontinuance Before Tax OtherComprehensiveIncomeLossCashFlowHedgeReclassificationForDiscontinuanceBeforeTax	225000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	-204432000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	-20493000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	-42929000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	-4304000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-161503000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-16189000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-110071000	usd
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	65364000	usd
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	709865000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	45534000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	29531000	usd
CY2020	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.28
CY2020	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	8165000	usd
CY2020	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	2569000	usd
CY2020	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	18582000	usd
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	3425000	usd
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	758669000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	81553000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-16189000	usd
CY2021	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.34
CY2021	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	9697000	usd
CY2021	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	3812000	usd
CY2021	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	5659000	usd
CY2021	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	3979000	usd
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	816468000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	51432000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-161503000	usd
CY2022	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.43
CY2022	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	15378000	usd
CY2022	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	77000	usd
CY2022	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	23605000	usd
CY2022	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	9042000	usd
CY2022	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	706643000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	1383176000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	81553000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	45534000	usd
CY2022	us-gaap	Depreciation And Amortization DepreciationAndAmortization	14254000	usd
CY2021	us-gaap	Depreciation And Amortization DepreciationAndAmortization	7550000	usd
CY2020	us-gaap	Depreciation And Amortization DepreciationAndAmortization	7638000	usd
CY2022	stel	Financing Receivable Credit Loss Expense Reversal And Off Balance Sheet Credit Loss Liability Credit Loss Expense Reversal FinancingReceivableCreditLossExpenseReversalAndOffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal	50712000	usd
CY2021	stel	Financing Receivable Credit Loss Expense Reversal And Off Balance Sheet Credit Loss Liability Credit Loss Expense Reversal FinancingReceivableCreditLossExpenseReversalAndOffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal	-2322000	usd
CY2020	stel	Financing Receivable Credit Loss Expense Reversal And Off Balance Sheet Credit Loss Liability Credit Loss Expense Reversal FinancingReceivableCreditLossExpenseReversalAndOffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal	27374000	usd
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	1931000	usd
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	2783000	usd
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-7059000	usd
CY2022	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-5729000	usd
CY2021	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-7764000	usd
CY2020	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-3731000	usd
CY2022	stel	Excess Tax Benefit From Stock Based Compensation ExcessTaxBenefitFromStockBasedCompensation	396000	usd
CY2021	stel	Excess Tax Benefit From Stock Based Compensation ExcessTaxBenefitFromStockBasedCompensation	620000	usd
CY2020	stel	Excess Tax Benefit From Stock Based Compensation ExcessTaxBenefitFromStockBasedCompensation	149000	usd
CY2022	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	1125000	usd
CY2021	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	554000	usd
CY2020	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	582000	usd
CY2022	stel	Accretion Amortization Of Discounts And Premiums Loans AccretionAmortizationOfDiscountsAndPremiumsLoans	8313000	usd
CY2021	stel	Accretion Amortization Of Discounts And Premiums Loans AccretionAmortizationOfDiscountsAndPremiumsLoans	458000	usd
CY2020	stel	Accretion Amortization Of Discounts And Premiums Loans AccretionAmortizationOfDiscountsAndPremiumsLoans	2508000	usd
CY2022	stel	Accretion Amortization Of Discounts And Premiums Subordinated Debt AccretionAmortizationOfDiscountsAndPremiumsSubordinatedDebt	-116000	usd
CY2021	stel	Accretion Amortization Of Discounts And Premiums Subordinated Debt AccretionAmortizationOfDiscountsAndPremiumsSubordinatedDebt	-114000	usd
CY2020	stel	Accretion Amortization Of Discounts And Premiums Subordinated Debt AccretionAmortizationOfDiscountsAndPremiumsSubordinatedDebt	-113000	usd
CY2022	stel	Accretion Amortization Of Discounts And Premiums Certificates Of Deposit AccretionAmortizationOfDiscountsAndPremiumsCertificatesOfDeposit	57000	usd
CY2021	stel	Accretion Amortization Of Discounts And Premiums Certificates Of Deposit AccretionAmortizationOfDiscountsAndPremiumsCertificatesOfDeposit	142000	usd
CY2020	stel	Accretion Amortization Of Discounts And Premiums Certificates Of Deposit AccretionAmortizationOfDiscountsAndPremiumsCertificatesOfDeposit	356000	usd
CY2022	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	952000	usd
CY2021	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	1317000	usd
CY2020	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	4065000	usd
CY2022	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	4050000	usd
CY2021	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	-272000	usd
CY2020	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	287000	usd
CY2022	stel	Federal Home Loan Bank Stock Dividends FederalHomeLoanBankStockDividends	141000	usd
CY2021	stel	Federal Home Loan Bank Stock Dividends FederalHomeLoanBankStockDividends	68000	usd
CY2020	stel	Federal Home Loan Bank Stock Dividends FederalHomeLoanBankStockDividends	192000	usd
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	9042000	usd
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	3979000	usd
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	3425000	usd
CY2022	stel	Increase Decrease In Operating Leases IncreaseDecreaseInOperatingLeases	2816000	usd
CY2021	stel	Increase Decrease In Operating Leases IncreaseDecreaseInOperatingLeases	2859000	usd
CY2020	stel	Increase Decrease In Operating Leases IncreaseDecreaseInOperatingLeases	2627000	usd
CY2022	stel	Increase Decrease In Accrued Interest Receivable And Other Assets IncreaseDecreaseInAccruedInterestReceivableAndOtherAssets	-2623000	usd
CY2021	stel	Increase Decrease In Accrued Interest Receivable And Other Assets IncreaseDecreaseInAccruedInterestReceivableAndOtherAssets	1317000	usd
CY2020	stel	Increase Decrease In Accrued Interest Receivable And Other Assets IncreaseDecreaseInAccruedInterestReceivableAndOtherAssets	24706000	usd
CY2022	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	-16459000	usd
CY2021	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	4671000	usd
CY2020	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	2395000	usd
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	109066000	usd
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	107381000	usd
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	61063000	usd
CY2022	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	2351865000	usd
CY2021	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	3281513000	usd
CY2020	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	3959259000	usd
CY2022	stel	Proceeds From Sales And Calls Of Available For Sale Securities ProceedsFromSalesAndCallsOfAvailableForSaleSecurities	365217000	usd
CY2021	stel	Proceeds From Sales And Calls Of Available For Sale Securities ProceedsFromSalesAndCallsOfAvailableForSaleSecurities	4898000	usd
CY2020	stel	Proceeds From Sales And Calls Of Available For Sale Securities ProceedsFromSalesAndCallsOfAvailableForSaleSecurities	38106000	usd
CY2022	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	2445525000	usd
CY2021	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	4315947000	usd
CY2020	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	4362521000	usd
CY2022	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	561197000	usd
CY2021	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	-277440000	usd
CY2020	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	591471000	usd
CY2022	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	3811000	usd
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2932000	usd
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	7182000	usd
CY2022	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	2322000	usd
CY2021	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	1738000	usd
CY2020	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	4027000	usd
CY2022	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	5559000	usd
CY2021	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	1534000	usd
CY2020	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	1322000	usd
CY2022	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	370448000	usd
CY2021	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	0	usd
CY2020	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	0	usd
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	73760000	usd
CY2020	us-gaap	Net Change Noninterest Bearing Deposits Domestic NetChangeNoninterestBearingDepositsDomestic	452335000	usd
CY2021	us-gaap	Net Change Interest Bearing Deposits Domestic NetChangeInterestBearingDepositsDomestic	520781000	usd
CY2020	us-gaap	Net Change Interest Bearing Deposits Domestic NetChangeInterestBearingDepositsDomestic	468402000	usd
CY2022	us-gaap	Proceeds From Repayments Of Other Debt ProceedsFromRepaymentsOfOtherDebt	-26000000	usd
CY2021	us-gaap	Proceeds From Repayments Of Other Debt ProceedsFromRepaymentsOfOtherDebt	-50000000	usd
CY2020	us-gaap	Proceeds From Repayments Of Other Debt ProceedsFromRepaymentsOfOtherDebt	65000000	usd
CY2022	us-gaap	Proceeds From Repayments Of Lines Of Credit ProceedsFromRepaymentsOfLinesOfCredit	0	usd
CY2021	us-gaap	Proceeds From Repayments Of Lines Of Credit ProceedsFromRepaymentsOfLinesOfCredit	-15569000	usd
CY2020	us-gaap	Proceeds From Repayments Of Lines Of Credit ProceedsFromRepaymentsOfLinesOfCredit	15000000	usd
CY2022	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	15378000	usd
CY2021	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	9697000	usd
CY2020	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	8165000	usd
CY2022	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	77000	usd
CY2021	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	3812000	usd
CY2020	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	2569000	usd
CY2022	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	23605000	usd
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	5659000	usd
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	18582000	usd
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-568630000	usd
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	982186000	usd
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	976559000	usd
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-385804000	usd
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	334743000	usd
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	76518000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	757509000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	422766000	usd
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	346248000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	371705000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	757509000	usd
CY2022	us-gaap	Income Taxes Paid IncomeTaxesPaid	15050000	usd
CY2021	us-gaap	Income Taxes Paid IncomeTaxesPaid	19250000	usd
CY2020	us-gaap	Income Taxes Paid IncomeTaxesPaid	15100000	usd
CY2022	us-gaap	Interest Paid Net InterestPaidNet	33691000	usd
CY2021	us-gaap	Interest Paid Net InterestPaidNet	25568000	usd
CY2022	us-gaap	Operating Lease Payments OperatingLeasePayments	4872000	usd
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	3056000	usd
CY2022	stel	Loans Transferred To Other Real Estate LoansTransferredToOtherRealEstate	0	usd
CY2021	stel	Loans Transferred To Other Real Estate LoansTransferredToOtherRealEstate	821000	usd
CY2020	stel	Loans Transferred To Other Real Estate LoansTransferredToOtherRealEstate	9209000	usd
CY2022	stel	Other Real Estate Transferred To Loans OtherRealEstateTransferredToLoans	2115000	usd
CY2021	stel	Other Real Estate Transferred To Loans OtherRealEstateTransferredToLoans	8125000	usd
CY2020	stel	Other Real Estate Transferred To Loans OtherRealEstateTransferredToLoans	2379000	usd
CY2022	stel	Branch Assets Transferred To Held For Sale BranchAssetsTransferredToHeldForSale	6013000	usd
CY2021	stel	Branch Assets Transferred To Held For Sale BranchAssetsTransferredToHeldForSale	2925000	usd
CY2020	stel	Branch Assets Transferred To Held For Sale BranchAssetsTransferredToHeldForSale	0	usd
CY2022	us-gaap	Noncash Or Part Noncash Acquisition Net Nonmonetary Assets Acquired Liabilities Assumed1 NoncashOrPartNoncashAcquisitionNetNonmonetaryAssetsAcquiredLiabilitiesAssumed1	0	usd
CY2021	us-gaap	Noncash Or Part Noncash Acquisition Net Nonmonetary Assets Acquired Liabilities Assumed1 NoncashOrPartNoncashAcquisitionNetNonmonetaryAssetsAcquiredLiabilitiesAssumed1	0	usd
CY2020	us-gaap	Noncash Or Part Noncash Acquisition Net Nonmonetary Assets Acquired Liabilities Assumed1 NoncashOrPartNoncashAcquisitionNetNonmonetaryAssetsAcquiredLiabilitiesAssumed1	0	usd
CY2022Q4	stel	Number Of Offices In Which Entity Operates NumberOfOfficesInWhichEntityOperates	60	office
CY2022Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1.00
CY2022Q4	stel	Merger Shares Consideration Received Ratio MergerSharesConsiderationReceivedRatio	1.4184	shares
CY2022	us-gaap	Use Of Estimates UseOfEstimates	<span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Use of Estimates—</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions based on available information. These estimates and assumptions affect the reporting of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.</span>
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	142461000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	1579825000	usd
CY2022Q4	us-gaap	Financing Receivable Accrued Interest After Allowance For Credit Loss FinancingReceivableAccruedInterestAfterAllowanceForCreditLoss	34100000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Accrued Interest After Allowance For Credit Loss DebtSecuritiesAvailableForSaleAccruedInterestAfterAllowanceForCreditLoss	10600000	usd
CY2022Q4	us-gaap	Other Real Estate OtherRealEstate	0	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	186103000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	996300000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	13302000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	45882000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	1516000	usd
CY2022	stel	Percentage Of Tax Benefit Realized Upon Ultimate Settlement With Taxing Authority PercentageOfTaxBenefitRealizedUponUltimateSettlementWithTaxingAuthority	0.50
CY2022	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	segment
CY2022	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Reclassifications</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">—Some items in the prior year financial statements were reclassified to conform to the current presentation. Reclassifications had no effect on prior year net income or shareholders’ equity.</span>
CY2021Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	1042182000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	14818000	usd
CY2022Q4	stel	Debt Securities Available For Sale Increase Due To Merger DebtSecuritiesAvailableForSaleIncreaseDueToMerger	513200000	usd
CY2022	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	353900000	usd
CY2022	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	1200000	usd
CY2022Q4	stel	Merger Shares Consideration Received Ratio MergerSharesConsiderationReceivedRatio	1.4184	shares
CY2022Q4	us-gaap	Financing Receivable Purchased With Credit Deterioration Allowance For Credit Loss At Acquisition Date FinancingReceivablePurchasedWithCreditDeteriorationAllowanceForCreditLossAtAcquisitionDate	7600000	usd
CY2022Q4	us-gaap	Financing Receivable Purchased With Credit Deterioration Amount At Par Value FinancingReceivablePurchasedWithCreditDeteriorationAmountAtParValue	71232000	usd
CY2022Q4	us-gaap	Financing Receivable Purchased With Credit Deterioration Discount Premium FinancingReceivablePurchasedWithCreditDeteriorationDiscountPremium	9290000	usd
CY2022Q4	stel	Financing Receivable Purchased With Credit Deterioration Amount At Par Value Net FinancingReceivablePurchasedWithCreditDeteriorationAmountAtParValueNet	61942000	usd
CY2022Q4	us-gaap	Financing Receivable Purchased With Credit Deterioration Allowance For Credit Loss At Acquisition Date FinancingReceivablePurchasedWithCreditDeteriorationAllowanceForCreditLossAtAcquisitionDate	7558000	usd
CY2022Q4	us-gaap	Financing Receivable Purchased With Credit Deterioration Amount At Purchase Price FinancingReceivablePurchasedWithCreditDeteriorationAmountAtPurchasePrice	54384000	usd
CY2022Q4	stel	Financing Receivable Acquired Fair Value FinancingReceivableAcquiredFairValue	2959572000	usd
CY2019Q4	us-gaap	Goodwill Goodwill	223642000	usd
CY2020Q4	us-gaap	Goodwill Goodwill	223642000	usd
CY2021Q4	us-gaap	Goodwill Goodwill	223642000	usd
CY2022	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	273618000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	497260000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	26813000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	24166000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	21528000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	18896000	usd
CY2022Q4	stel	Finite Lived Intangible Asset Expected Amortization After Year Four FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour	52122000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	143525000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss	1988916000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	4773000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	186103000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	1807586000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss	1750663000	usd
CY2021Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	37920000	usd
CY2021Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	14818000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	1773765000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	77489000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	74812000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	198574000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	185719000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	173570000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	163209000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	707052000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	660915000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis	1156685000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate	1084655000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost	832231000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue	722931000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss	1988916000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	1807586000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	613275000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	43642000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	966550000	usd
CY2022	stel	Proceeds From Maturities Calls Of Available For Sale Securities ProceedsFromMaturitiesCallsOfAvailableForSaleSecurities	2400000	usd
CY2021	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	4900000	usd
CY2021	stel	Proceeds From Maturities Calls Of Available For Sale Securities ProceedsFromMaturitiesCallsOfAvailableForSaleSecurities	965000	usd
CY2021	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	49000	usd
CY2022Q4	us-gaap	Financial Instruments Owned At Fair Value FinancialInstrumentsOwnedAtFairValue	978900000	usd
CY2021Q4	us-gaap	Financial Instruments Owned At Fair Value FinancialInstrumentsOwnedAtFairValue	258800000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	7754751000	usd
CY2021Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	4220486000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	93180000	usd
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	47940000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest After Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss	7661571000	usd
CY2021Q4	us-gaap	Financing Receivable Excluding Accrued Interest After Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss	4172546000	usd
CY2022	stel	Commercial Real Estate Loans Loans Secured By Owner Occupied Properties Percent CommercialRealEstateLoansLoansSecuredByOwnerOccupiedPropertiesPercent	0.453
CY2021Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	1253000	usd
CY2022	stel	Loans And Leases Receivable Related Partied Merger LoansAndLeasesReceivableRelatedPartiedMerger	83595000	usd
CY2022	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	3741000	usd
CY2022	us-gaap	Loans And Leases Receivable Related Parties Proceeds LoansAndLeasesReceivableRelatedPartiesProceeds	9724000	usd
CY2022Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	78865000	usd
CY2022Q4	us-gaap	Financing Receivable Accrued Interest After Allowance For Credit Loss FinancingReceivableAccruedInterestAfterAllowanceForCreditLoss	34100000	usd
CY2021Q4	us-gaap	Financing Receivable Accrued Interest After Allowance For Credit Loss FinancingReceivableAccruedInterestAfterAllowanceForCreditLoss	26000000	usd
CY2022Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	45048000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	7754751000	usd
CY2021Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	24127000	usd
CY2021Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	4220486000	usd
CY2022	stel	Financing Receivable Nonaccrual Interest Income Under Original Loan Terms FinancingReceivableNonaccrualInterestIncomeUnderOriginalLoanTerms	1700000	usd
CY2021	stel	Financing Receivable Nonaccrual Interest Income Under Original Loan Terms FinancingReceivableNonaccrualInterestIncomeUnderOriginalLoanTerms	948000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Year One Originated Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear	2810489000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Year Two Originated Fiscal Year Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear	1821100000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Year Three Originated Two Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear	806522000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Year Four Originated Three Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear	582289000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Year Five Originated Four Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear	422387000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Originated More Than Five Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear	488122000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Revolving FinancingReceivableExcludingAccruedInterestRevolving	774857000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Revolving Converted To Term Loan FinancingReceivableExcludingAccruedInterestRevolvingConvertedToTermLoan	48985000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	7754751000	usd
CY2021Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	4220486000	usd
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	47940000	usd
CY2022	stel	Financing Receivable Allowance For Credit Loss Increase To Purchased Credit Deteriorated Loans Acquired FinancingReceivableAllowanceForCreditLossIncreaseToPurchasedCreditDeterioratedLoansAcquired	7558000	usd
CY2022	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	44032000	usd
CY2022	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	8056000	usd
CY2022	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	1706000	usd
CY2022	stel	Financing Receivable Allowance For Credit Loss Net Write Off Recovery FinancingReceivableAllowanceForCreditLossNetWriteOffRecovery	-6350000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	93180000	usd
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	53173000	usd
CY2021	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	-2923000	usd
CY2021	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	2481000	usd
CY2021	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	171000	usd
CY2021	stel	Financing Receivable Allowance For Credit Loss Net Write Off Recovery FinancingReceivableAllowanceForCreditLossNetWriteOffRecovery	-2310000	usd
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	47940000	usd
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	29438000	usd
CY2020	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	26543000	usd
CY2020	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	8583000	usd
CY2020	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	550000	usd
CY2020	stel	Financing Receivable Allowance For Credit Loss Net Write Off Recovery FinancingReceivableAllowanceForCreditLossNetWriteOffRecovery	-8033000	usd
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	53173000	usd
CY2022Q4	stel	Financing Receivable Excluding Accrued Interest Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss Collateral Dependent FinancingReceivableExcludingAccruedInterestFinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossCollateralDependent	23531000	usd
CY2021Q4	stel	Financing Receivable Excluding Accrued Interest Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss Collateral Dependent FinancingReceivableExcludingAccruedInterestFinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossCollateralDependent	16568000	usd
CY2021	us-gaap	Financing Receivable Nonaccrual Interest Income FinancingReceivableNonaccrualInterestIncome	0	usd
CY2022	us-gaap	Financing Receivable Nonaccrual Interest Income FinancingReceivableNonaccrualInterestIncome	0	usd
CY2022Q4	us-gaap	Financing Receivable Nonaccrual No Allowance FinancingReceivableNonaccrualNoAllowance	16535000	usd
CY2022Q4	stel	Financing Receivable Nonaccrual With Related Allowance FinancingReceivableNonaccrualWithRelatedAllowance	28513000	usd
CY2022Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	45048000	usd
CY2021Q4	us-gaap	Financing Receivable Nonaccrual No Allowance FinancingReceivableNonaccrualNoAllowance	13387000	usd
CY2021Q4	stel	Financing Receivable Nonaccrual With Related Allowance FinancingReceivableNonaccrualWithRelatedAllowance	10740000	usd
CY2021Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	24127000	usd
CY2022Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	48400000	usd
CY2021Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	19200000	usd
CY2022Q4	stel	Financing Receivable Troubled Debt Restructuring Allowance For Credit Loss FinancingReceivableTroubledDebtRestructuringAllowanceForCreditLoss	5400000	usd
CY2021Q4	stel	Financing Receivable Troubled Debt Restructuring Allowance For Credit Loss FinancingReceivableTroubledDebtRestructuringAllowanceForCreditLoss	1900000	usd
CY2022	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	23	contract
CY2022	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	11885000	usd
CY2022	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	11896000	usd
CY2021	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	10	contract
CY2021	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	3436000	usd
CY2021	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	3436000	usd
CY2020	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	32	contract
CY2020	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	11804000	usd
CY2020	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	11804000	usd
CY2022	us-gaap	Financing Receivables Impaired Troubled Debt Restructuring Write Down FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown	891000	usd
CY2021	us-gaap	Financing Receivables Impaired Troubled Debt Restructuring Write Down FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown	620000	usd
CY2020	us-gaap	Financing Receivables Impaired Troubled Debt Restructuring Write Down FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown	3200000	usd
CY2022	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	1	contract
CY2022	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	136000	usd
CY2021	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	3	contract
CY2021	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	247000	usd
CY2022	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	11900000	usd
CY2021	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	3400000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	149676000	usd
CY2021Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	83650000	usd
CY2022Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	22873000	usd
CY2021Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	19942000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	126803000	usd
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	63708000	usd
CY2022	us-gaap	Depreciation Depreciation	5000000	usd
CY2021	us-gaap	Depreciation Depreciation	4300000	usd
CY2022	stel	Number Of Leased Branch Locations And Office Space Along With Equipment NumberOfLeasedBranchLocationsAndOfficeSpaceAlongWithEquipment	32	lease
CY2022	stel	Number Of Leases Obtained In Business Combination NumberOfLeasesObtainedInBusinessCombination	15	lease
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	23538000	usd
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	10196000	usd
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	23136000	usd
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	10370000	usd
CY2022Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P8Y2M4D
CY2021Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P4Y11M19D
CY2022Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0400
CY2021Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0262
CY2022	stel	Operating Lease Right Of Use Asset Increase During Period OperatingLeaseRightOfUseAssetIncreaseDuringPeriod	13600000	usd
CY2022	us-gaap	Increase Decrease In Operating Lease Liability IncreaseDecreaseInOperatingLeaseLiability	12800000	usd
CY2022	us-gaap	Operating Lease Cost OperatingLeaseCost	5014000	usd
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	3471000	usd
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	3270000	usd
CY2022	us-gaap	Short Term Lease Cost ShortTermLeaseCost	5000	usd
CY2021	us-gaap	Short Term Lease Cost ShortTermLeaseCost	34000	usd
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	78000	usd
CY2022	us-gaap	Sublease Income SubleaseIncome	0	usd
CY2021	us-gaap	Sublease Income SubleaseIncome	72000	usd
CY2020	us-gaap	Sublease Income SubleaseIncome	66000	usd
CY2022	us-gaap	Lease Cost LeaseCost	5019000	usd
CY2021	us-gaap	Lease Cost LeaseCost	3433000	usd
CY2020	us-gaap	Lease Cost LeaseCost	3282000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	4634000	usd
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	2951000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	104000	usd
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	2350000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	3684000	usd
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	1892000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	3132000	usd
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	1366000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	2918000	usd
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	894000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	9303000	usd
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	1594000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	23775000	usd
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	11047000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	639000	usd
CY2021Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	677000	usd
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	23136000	usd
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	10370000	usd
CY2022Q4	us-gaap	Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust	11341000	usd
CY2022Q4	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	432900000	usd
CY2021Q4	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	707500000	usd
CY2022Q4	us-gaap	Time Deposit Maturities Year One TimeDepositMaturitiesYearOne	705239000	usd
CY2022Q4	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	123160000	usd
CY2022Q4	stel	Time Deposit Maturities Over Three Years TimeDepositMaturitiesOverThreeYears	41313000	usd
CY2022Q4	us-gaap	Time Deposits TimeDeposits	869712000	usd
CY2022Q4	us-gaap	Interest Bearing Domestic Deposit Brokered InterestBearingDomesticDepositBrokered	72500000	usd
CY2021Q4	us-gaap	Interest Bearing Domestic Deposit Brokered InterestBearingDomesticDepositBrokered	306400000	usd
CY2022Q4	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	178800000	usd
CY2021Q4	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	16300000	usd
CY2022Q4	stel	Related Party Deposits Increase During Period RelatedPartyDepositsIncreaseDuringPeriod	162500000	usd
CY2022	stel	Number Of Interest Rate Swap Agreements Outstanding NumberOfInterestRateSwapAgreementsOutstanding	14	interest_rate_swap
CY2022	stel	Number Of Credit Risk Participation Agreements NumberOfCreditRiskParticipationAgreements	3	creditagreement
CY2022	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	9161000	usd
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	15558000	usd
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	17527000	usd
CY2022	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	1931000	usd
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	2783000	usd
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-7090000	usd
CY2022	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	11092000	usd
CY2021	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	18341000	usd
CY2020	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	10437000	usd
CY2022	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	13130000	usd
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	20978000	usd
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	11754000	usd
CY2022	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	-396000	usd
CY2021	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	-620000	usd
CY2020	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	136000	usd
CY2022	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	2554000	usd
CY2021	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	2190000	usd
CY2020	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	1475000	usd
CY2022	stel	Effective Income Tax Rate Reconciliation Merger Expense EffectiveIncomeTaxRateReconciliationMergerExpense	406000	usd
CY2021	stel	Effective Income Tax Rate Reconciliation Merger Expense EffectiveIncomeTaxRateReconciliationMergerExpense	227000	usd
CY2020	stel	Effective Income Tax Rate Reconciliation Merger Expense EffectiveIncomeTaxRateReconciliationMergerExpense	0	usd
CY2022	stel	Effective Income Tax Rate Reconciliation Nondeductible Expense Bank Owned Life Insurance Amount EffectiveIncomeTaxRateReconciliationNondeductibleExpenseBankOwnedLifeInsuranceAmount	-236000	usd
CY2021	stel	Effective Income Tax Rate Reconciliation Nondeductible Expense Bank Owned Life Insurance Amount EffectiveIncomeTaxRateReconciliationNondeductibleExpenseBankOwnedLifeInsuranceAmount	-54000	usd
CY2020	stel	Effective Income Tax Rate Reconciliation Nondeductible Expense Bank Owned Life Insurance Amount EffectiveIncomeTaxRateReconciliationNondeductibleExpenseBankOwnedLifeInsuranceAmount	22000	usd
CY2022	stel	Effective Income Tax Rate Reconciliation Salaries Deduction Limitation EffectiveIncomeTaxRateReconciliationSalariesDeductionLimitation	490000	usd
CY2021	stel	Effective Income Tax Rate Reconciliation Salaries Deduction Limitation EffectiveIncomeTaxRateReconciliationSalariesDeductionLimitation	0	usd
CY2020	stel	Effective Income Tax Rate Reconciliation Salaries Deduction Limitation EffectiveIncomeTaxRateReconciliationSalariesDeductionLimitation	0	usd
CY2022	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	252000	usd
CY2021	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	0	usd
CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	0	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	11092000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	18341000	usd
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	10437000	usd
CY2022Q4	us-gaap	Excess Capital To Risk Weighted Assets ExcessCapitalToRiskWeightedAssets	0.1050
CY2022Q4	stel	Common Equity Tier One Risk Based Capital CommonEquityTierOneRiskBasedCapital	885652000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	22685000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	11240000	usd
CY2022Q4	stel	Deferred Tax Assets Deferred Loan Fees DeferredTaxAssetsDeferredLoanFees	62000	usd
CY2021Q4	stel	Deferred Tax Assets Deferred Loan Fees DeferredTaxAssetsDeferredLoanFees	1077000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	2636000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	836000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Investments DeferredTaxAssetsInvestments	40239000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Investments DeferredTaxAssetsInvestments	0	usd
CY2022Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross	38080000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross	0	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Other DeferredTaxAssetsTaxDeferredExpenseOther	393000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Other DeferredTaxAssetsTaxDeferredExpenseOther	216000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	104095000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	13369000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	30591000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	3416000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	0	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	4853000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	4004000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	2551000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	34595000	usd
CY2021Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	10820000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	69500000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	2549000	usd
CY2020	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	0	usd
CY2022	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	0	usd
CY2021	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	0	usd
CY2022Q4	stel	Merger Shares Consideration Received Ratio MergerSharesConsiderationReceivedRatio	1.4184	shares
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	2000000	shares
CY2022	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	9000000	usd
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	4000000	usd
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	3400000	usd
CY2022Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested Number Of Shares SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares	166160	shares
CY2022Q4	stel	Common Equity Tier One Risk Based Capital To Risk Weighted Assets CommonEquityTierOneRiskBasedCapitalToRiskWeightedAssets	0.1004
CY2022Q4	stel	Common Equity Tier One Risk Based Capital Required For Capital Adequacy CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacy	396993000	usd
CY2022Q4	stel	Common Equity Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeighted	0.0450
CY2022Q4	stel	Excess Common Equity Tier One Risk Based Capital ExcessCommonEquityTierOneRiskBasedCapital	617545000	usd
CY2022Q4	stel	Excess Common Equity Tier One Risk Based Capitalto Risk Weighted Assets ExcessCommonEquityTierOneRiskBasedCapitaltoRiskWeightedAssets	0.0700
CY2022Q4	us-gaap	Tier One Risk Based Capital TierOneRiskBasedCapital	895520000	usd
CY2022Q4	us-gaap	Tier One Risk Based Capital To Risk Weighted Assets TierOneRiskBasedCapitalToRiskWeightedAssets	0.1015
CY2022Q4	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy TierOneRiskBasedCapitalRequiredForCapitalAdequacy	529324000	usd
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	665000	shares
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	14.86
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P3Y5M4D
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	6118000	usd
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0	shares
CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	0
CY2021	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	262000	shares
CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	12.94
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	2000	shares
CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	24.07
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	401000	shares
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	16.03
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P2Y10M24D
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	5508000	usd
CY2022	stel	Share Based Compensation Arrangement By Share Based Payment Award Options Options Obtained In Merger ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOptionsObtainedInMerger	166000	shares
CY2022	stel	Share Based Compensation Arrangement By Share Based Payment Award Options Obtained In Merger Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsObtainedInMergerWeightedAverageExercisePrice	18.48
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0	shares
CY2022	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	0
CY2022	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	173000	shares
CY2022	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	14.47
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	26000	shares
CY2022	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	15.79
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	368000	shares
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	17.89
CY2022	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P2Y8M19D
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	4256000	usd
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	368000	shares
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	17.89
CY2022	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P2Y8M19D
CY2022Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	4256000	usd
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	2112000	usd
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	3003000	usd
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	734000	usd
CY2022	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	2510000	usd
CY2021	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	3372000	usd
CY2020	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	2221000	usd
CY2022	stel	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Conversions Due To Merger ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsConversionsDueToMerger	93000	shares
CY2022	stel	Share Based Compensation Arrangement By Share Based Payment Award Options Conversions Due To Merger Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsConversionsDueToMergerWeightedAverageExercisePrice	27.86
CY2022Q4	stel	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Shares Converted To Common Shares ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsSharesConvertedToCommonShares	146568	shares
CY2017Q4	stel	Salary Continuation Agreement Annual Payment SalaryContinuationAgreementAnnualPayment	200000	usd
CY2017Q4	stel	Salary Continuation Arrangement Agreement Term SalaryContinuationArrangementAgreementTerm	P10Y
CY2017Q4	stel	Salary Continuation Arrangement Agreement Commencement Age SalaryContinuationArrangementAgreementCommencementAge	70	commencementage
CY2022Q4	stel	Salary Continuation Agreement Settlement Payment SalaryContinuationAgreementSettlementPayment	1500000	usd
CY2022Q4	stel	Offbalance Sheet Financial Instrument Fixed Rate Contractual Amount OffbalanceSheetFinancialInstrumentFixedRateContractualAmount	683408000	usd
CY2022Q4	stel	Offbalance Sheet Financial Instrument Variable Rate Contractual Amount OffbalanceSheetFinancialInstrumentVariableRateContractualAmount	1711817000	usd
CY2021Q4	stel	Offbalance Sheet Financial Instrument Fixed Rate Contractual Amount OffbalanceSheetFinancialInstrumentFixedRateContractualAmount	492977000	usd
CY2021Q4	stel	Offbalance Sheet Financial Instrument Variable Rate Contractual Amount OffbalanceSheetFinancialInstrumentVariableRateContractualAmount	619730000	usd
CY2022Q4	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	1080000000.00	usd
CY2021Q4	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	1360000000	usd
CY2022	stel	Commitments To Make Loans Period CommitmentsToMakeLoansPeriod	P120D
CY2022Q4	us-gaap	Capital Capital	1092618000	usd
CY2022Q4	us-gaap	Capital To Risk Weighted Assets CapitalToRiskWeightedAssets	0.1239
CY2022Q4	us-gaap	Capital Required For Capital Adequacy CapitalRequiredForCapitalAdequacy	705765000	usd
CY2022Q4	us-gaap	Capital Required For Capital Adequacy To Risk Weighted Assets CapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.0800
CY2022Q4	us-gaap	Excess Capital ExcessCapital	926317000	usd
CY2022Q4	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.0600
CY2022Q4	us-gaap	Excess Tier One Risk Based Capital ExcessTierOneRiskBasedCapital	749876000	usd
CY2022Q4	us-gaap	Excess Tier One Risk Based Capital To Risk Weighted Assets ExcessTierOneRiskBasedCapitalToRiskWeightedAssets	0.0850
CY2022Q4	us-gaap	Tier One Leverage Capital TierOneLeverageCapital	895520000	usd
CY2022Q4	us-gaap	Tier One Leverage Capital To Average Assets TierOneLeverageCapitalToAverageAssets	0.0855
CY2022Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy TierOneLeverageCapitalRequiredForCapitalAdequacy	418720000	usd
CY2022Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy To Average Assets TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets	0.0400
CY2022Q4	us-gaap	Excess Tier One Leverage Capital ExcessTierOneLeverageCapital	418720000	usd
CY2022Q4	us-gaap	Excess Tier One Leverage Capital To Average Assets ExcessTierOneLeverageCapitalToAverageAssets	0.0400
CY2021Q4	us-gaap	Capital Capital	722010000	usd
CY2021Q4	us-gaap	Capital To Risk Weighted Assets CapitalToRiskWeightedAssets	0.1608
CY2021Q4	us-gaap	Capital Required For Capital Adequacy CapitalRequiredForCapitalAdequacy	359214000	usd
CY2021Q4	us-gaap	Capital Required For Capital Adequacy To Risk Weighted Assets CapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.0800
CY2021Q4	us-gaap	Excess Capital ExcessCapital	471468000	usd
CY2021Q4	us-gaap	Excess Capital To Risk Weighted Assets ExcessCapitalToRiskWeightedAssets	0.1050
CY2021Q4	stel	Common Equity Tier One Risk Based Capital CommonEquityTierOneRiskBasedCapital	559926000	usd
CY2021Q4	stel	Common Equity Tier One Risk Based Capital To Risk Weighted Assets CommonEquityTierOneRiskBasedCapitalToRiskWeightedAssets	0.1247
CY2021Q4	stel	Common Equity Tier One Risk Based Capital Required For Capital Adequacy CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacy	202058000	usd
CY2021Q4	stel	Common Equity Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeighted	0.0450
CY2021Q4	stel	Excess Common Equity Tier One Risk Based Capital ExcessCommonEquityTierOneRiskBasedCapital	314312000	usd
CY2021Q4	stel	Excess Common Equity Tier One Risk Based Capitalto Risk Weighted Assets ExcessCommonEquityTierOneRiskBasedCapitaltoRiskWeightedAssets	0.0700
CY2021Q4	us-gaap	Tier One Risk Based Capital TierOneRiskBasedCapital	569678000	usd
CY2021Q4	us-gaap	Tier One Risk Based Capital To Risk Weighted Assets TierOneRiskBasedCapitalToRiskWeightedAssets	0.1269
CY2021Q4	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy TierOneRiskBasedCapitalRequiredForCapitalAdequacy	269410000	usd
CY2021Q4	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.0600
CY2021Q4	us-gaap	Excess Tier One Risk Based Capital ExcessTierOneRiskBasedCapital	381665000	usd
CY2021Q4	us-gaap	Excess Tier One Risk Based Capital To Risk Weighted Assets ExcessTierOneRiskBasedCapitalToRiskWeightedAssets	0.0850
CY2021Q4	us-gaap	Tier One Leverage Capital TierOneLeverageCapital	569678000	usd
CY2021Q4	us-gaap	Tier One Leverage Capital To Average Assets TierOneLeverageCapitalToAverageAssets	0.0853
CY2021Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy TierOneLeverageCapitalRequiredForCapitalAdequacy	267286000	usd
CY2021Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy To Average Assets TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets	0.0400
CY2021Q4	us-gaap	Excess Tier One Leverage Capital ExcessTierOneLeverageCapital	267286000	usd
CY2021Q4	us-gaap	Excess Tier One Leverage Capital To Average Assets ExcessTierOneLeverageCapitalToAverageAssets	0.0400
CY2022	us-gaap	Net Income Loss NetIncomeLoss	51432000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	81553000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	45534000	usd
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	34738000	shares
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.48
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	28660000	shares
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.85
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	28957000	shares
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.57
CY2022	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	269000	shares
CY2021	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	212000	shares
CY2020	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	185000	shares
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	35007000	shares
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.47
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	28872000	shares
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.82
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	29142000	shares
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.56

Files In Submission

Name	View Source	Status
stel-20221231_lab.xml	Edgar Link	unprocessable
0001473844-23-000013-index-headers.html	Edgar Link	pending
0001473844-23-000013-index.html	Edgar Link	pending
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stel-20221231_htm.xml	Edgar Link	completed
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stel-listofsubsidiaries202.htm	Edgar Link	pending
stel10-kconsentx2022xexx231.htm	Edgar Link	pending
stel-20221231_cal.xml	Edgar Link	unprocessable
stel-20221231_def.xml	Edgar Link	unprocessable
stel-20221231_pre.xml	Edgar Link	unprocessable

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$STEL
Stellar Bancorp Inc Stock $stel

2023 Q1 Form 10-K Financial Statement

#000147384423000013 Filed on March 15, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$STEL Stellar Bancorp Inc Stock $stel

2023 Q1 Form 10-K Financial Statement

#000147384423000013 Filed on March 15, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$STEL
Stellar Bancorp Inc Stock $stel