Disclosures About Fair Value of Assets and Liabilities - Schedule of Unobservable Inputs Used in Recurring and Nonrecurring Level 3 Fair Value Measurements (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Collateral-dependent individually evaluated loans [Member]
Schedule of Unobservable Inputs Used in Recurring and Nonrecurring Level 3 Fair Value Measurements [Line Items]
Fair value	$ 955
Valuation technique	Market comparable properties
Unobservable inputs	Comparability adjustments (%)
Range (weighted- average)	1 - 19% (12%)
IRLCs [Member]
Schedule of Unobservable Inputs Used in Recurring and Nonrecurring Level 3 Fair Value Measurements [Line Items]
Fair value	$ 15	$ (21)
Valuation technique	Discounted cash flow	Discounted cash flow
Unobservable inputs	Loan closing rates	Loan closing rates
Range (weighted- average)
Collateral-dependent impaired loans [Member]
Schedule of Unobservable Inputs Used in Recurring and Nonrecurring Level 3 Fair Value Measurements [Line Items]
Fair value		$ 1,167
Valuation technique		Market comparable properties
Unobservable inputs		Comparability adjustments (%)
Range (weighted- average)		24 - 404% (84%)
Minimum [Member] \| Collateral-dependent individually evaluated loans [Member]
Schedule of Unobservable Inputs Used in Recurring and Nonrecurring Level 3 Fair Value Measurements [Line Items]
Range (weighted- average)
Minimum [Member] \| IRLCs [Member]
Schedule of Unobservable Inputs Used in Recurring and Nonrecurring Level 3 Fair Value Measurements [Line Items]
Range (weighted- average)	43%	64%
Minimum [Member] \| Collateral-dependent impaired loans [Member]
Schedule of Unobservable Inputs Used in Recurring and Nonrecurring Level 3 Fair Value Measurements [Line Items]
Range (weighted- average)
Maximum [Member] \| Collateral-dependent individually evaluated loans [Member]
Schedule of Unobservable Inputs Used in Recurring and Nonrecurring Level 3 Fair Value Measurements [Line Items]
Range (weighted- average)
Maximum [Member] \| IRLCs [Member]
Schedule of Unobservable Inputs Used in Recurring and Nonrecurring Level 3 Fair Value Measurements [Line Items]
Range (weighted- average)	99%	99%
Maximum [Member] \| Collateral-dependent impaired loans [Member]
Schedule of Unobservable Inputs Used in Recurring and Nonrecurring Level 3 Fair Value Measurements [Line Items]
Range (weighted- average)
Discount Rate [Member] \| Mortgage servicing rights [Member]
Schedule of Unobservable Inputs Used in Recurring and Nonrecurring Level 3 Fair Value Measurements [Line Items]
Fair value	$ 5,813	$ 1,814
Valuation technique	Discounted cash flow	Discounted cash flow
Unobservable inputs	Discount rate	Discount rate
Range (weighted- average)	10.38%	11.13%
Discount Rate [Member] \| Minimum [Member] \| Mortgage servicing rights [Member]
Schedule of Unobservable Inputs Used in Recurring and Nonrecurring Level 3 Fair Value Measurements [Line Items]
Range (weighted- average)
Discount Rate [Member] \| Maximum [Member] \| Mortgage servicing rights [Member]
Schedule of Unobservable Inputs Used in Recurring and Nonrecurring Level 3 Fair Value Measurements [Line Items]
Range (weighted- average)
Constant prepayment rate [Member] \| Mortgage servicing rights [Member]
Schedule of Unobservable Inputs Used in Recurring and Nonrecurring Level 3 Fair Value Measurements [Line Items]
Unobservable inputs	Constant prepayment rate	Constant prepayment rate
Range (weighted- average)	7.34%	7.30%
Constant prepayment rate [Member] \| Minimum [Member] \| Mortgage servicing rights [Member]
Schedule of Unobservable Inputs Used in Recurring and Nonrecurring Level 3 Fair Value Measurements [Line Items]
Range (weighted- average)
Constant prepayment rate [Member] \| Maximum [Member] \| Mortgage servicing rights [Member]
Schedule of Unobservable Inputs Used in Recurring and Nonrecurring Level 3 Fair Value Measurements [Line Items]
Range (weighted- average)
P&I earnings credit [Member] \| Mortgage servicing rights [Member]
Schedule of Unobservable Inputs Used in Recurring and Nonrecurring Level 3 Fair Value Measurements [Line Items]
Unobservable inputs	P&I earnings credit	P&I earnings credit
Range (weighted- average)	3.73%	4.44%
P&I earnings credit [Member] \| Minimum [Member] \| Mortgage servicing rights [Member]
Schedule of Unobservable Inputs Used in Recurring and Nonrecurring Level 3 Fair Value Measurements [Line Items]
Range (weighted- average)
P&I earnings credit [Member] \| Maximum [Member] \| Mortgage servicing rights [Member]
Schedule of Unobservable Inputs Used in Recurring and Nonrecurring Level 3 Fair Value Measurements [Line Items]
Range (weighted- average)
T&I earnings credit [Member] \| Mortgage servicing rights [Member]
Schedule of Unobservable Inputs Used in Recurring and Nonrecurring Level 3 Fair Value Measurements [Line Items]
Unobservable inputs	T&I earnings credit	T&I earnings credit
Range (weighted- average)	3.93%	4.49%
T&I earnings credit [Member] \| Minimum [Member] \| Mortgage servicing rights [Member]
Schedule of Unobservable Inputs Used in Recurring and Nonrecurring Level 3 Fair Value Measurements [Line Items]
Range (weighted- average)
T&I earnings credit [Member] \| Maximum [Member] \| Mortgage servicing rights [Member]
Schedule of Unobservable Inputs Used in Recurring and Nonrecurring Level 3 Fair Value Measurements [Line Items]
Range (weighted- average)
Inflation for cost of servicing [Member] \| Mortgage servicing rights [Member]
Schedule of Unobservable Inputs Used in Recurring and Nonrecurring Level 3 Fair Value Measurements [Line Items]
Unobservable inputs	Inflation for cost of servicing	Inflation for cost of servicing
Range (weighted- average)	3.50%	3.50%
Inflation for cost of servicing [Member] \| Minimum [Member] \| Mortgage servicing rights [Member]
Schedule of Unobservable Inputs Used in Recurring and Nonrecurring Level 3 Fair Value Measurements [Line Items]
Range (weighted- average)
Inflation for cost of servicing [Member] \| Maximum [Member] \| Mortgage servicing rights [Member]
Schedule of Unobservable Inputs Used in Recurring and Nonrecurring Level 3 Fair Value Measurements [Line Items]
Range (weighted- average)

SB FINANCIAL GROUP, INC. 10-K