XML 102 R80.htm IDEA: XBRL DOCUMENT
v3.25.4

DERIVATIVE INSTRUMENTS - Schedule of Weighted-average Rates Paid And Received for Interest Rate Swaps (Details) - Interest rate swaps - Not Designated as Hedging Instrument | Dec. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Financial institution counterparties |  |
Derivatives Fair Value [Line Items] |  |
Interest Rate Received | 6.01% | 6.79%
Interest Rate Paid | 5.04% | 4.36%
Customer counterparties |  |
Derivatives Fair Value [Line Items] |  |
Interest Rate Received | 5.04% | 4.36%
Interest Rate Paid | 6.01% | 6.79%

X
- Definition Derivative Instrument, Weighted Average Interest Rate Paid + References No definition available. + Details
Name: | stel_DerivativeInstrumentWeightedAverageInterestRatePaid
Namespace Prefix: | stel_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Derivative Instrument, Weighted Average Interest Rate Received + References No definition available. + Details
Name: | stel_DerivativeInstrumentWeightedAverageInterestRateReceived
Namespace Prefix: | stel_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 182 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480401/815-10-55-182 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4B -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4B Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4B -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4B Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4B -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4B Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4B Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A + Details
Name: | us-gaap_DerivativesFairValueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_CounterpartyNameAxis=stel_CounterpartyFinancialInstitutionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateSwapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_HedgingDesignationAxis=us-gaap_NondesignatedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CounterpartyNameAxis=stel_CounterpartyCustomerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |