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Stock-based Compensation and Benefits - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023	Dec. 31, 2022
NBH Holdings Corp. 2023 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized	978,738		978,738
Share-based Compensation Arrangement by Share-based Payment Award, Reduction in Number of Shares for Every One Option or Stock Appreciation Right Granted			1
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual term (in years)			10 years
Stock based compensation expense	$ 100,000	$ 100,000	$ 300,000	$ 800,000
Unrecognized compensation expense	200,000		$ 200,000
Unrecognized compensation cost, weighted-average period, years			1 year 4 months 24 days
Employee Stock Option | NBH Holdings Corp. 2023 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award Vesting Rights, Percentage			33.30%
Restricted stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted (in shares)			183,723
Restricted stock awards | NBH Holdings Corp. 2023 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	1,400,000	1,200,000	$ 3,800,000	3,200,000
Unrecognized compensation expense	6,500,000		$ 6,500,000
Unrecognized compensation cost, weighted-average period, years			2 years 1 month 6 days
Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted (in shares)			79,254
Performance stock units | NBH Holdings Corp. 2023 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	600,000	$ 400,000	$ 1,600,000	$ 1,300,000
Unrecognized compensation expense	$ 3,900,000		$ 3,900,000
Unrecognized compensation cost, weighted-average period, years			2 years
Performance period			3 years
Performance stock units | NBH Holdings Corp. 2023 Omnibus Incentive Plan | EPS target
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of awards based on performance type			33.00%		60.00%	60.00%
Performance stock units | NBH Holdings Corp. 2023 Omnibus Incentive Plan | TSR target
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of awards based on performance type			33.00%		40.00%	40.00%
Performance stock units | NBH Holdings Corp. 2023 Omnibus Incentive Plan | ROTA target
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of awards based on performance type			33.00%
Employee stock | 2014 Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum stock purchases by employees, value			$ 25,000
Maximum stock purchases by employees (in shares)			2,000
Discount on purchase of common stock (as a percent)			90.00%
Offering period for employee stock purchases			6 months
Number of shares authorized	400,000		400,000
Shares available for issuance	214,530		214,530
Employees purchased shares (in shares)			21,389	26,563
Minimum | Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			1 year
Minimum | Restricted stock awards | NBH Holdings Corp. 2023 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			1 year
Minimum | Performance stock units | NBH Holdings Corp. 2023 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of initial target awards			0.00%
Maximum | Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			3 years
Maximum | Restricted stock awards | NBH Holdings Corp. 2023 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			3 years
Maximum | Performance stock units | NBH Holdings Corp. 2023 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of initial target awards			150.00%
2Unifi LLC | Class B Units | Share-based payment arrangement | 2023 Equity Unit Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted in period			122,000		112,000
Vesting period			5 years
Unrecognized compensation expense	$ 100,000		$ 100,000
2Unifi LLC | Class B Units | Share-based payment arrangement | 2023 Equity Unit Incentive Plan | EPS target
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award Vesting Rights, Percentage			50.00%
2Unifi LLC | Class B Units | Share-based payment arrangement | 2023 Equity Unit Incentive Plan | TSR target
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award Vesting Rights, Percentage			25.00%
2Unifi LLC | Class B Units | Maximum | Share-based payment arrangement | 2023 Equity Unit Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized					200,000

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-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1

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