Cover - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Mar. 09, 2026	Jun. 30, 2025
Document Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2025
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Securities Act File Number	814-01035
Entity Registrant Name	NEWTEKONE, INC.
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	46-3755188
Entity Address, Address Line One	4800 T Rex Avenue
Entity Address, Address Line Two	Suite 120
Entity Address, City or Town	Boca Raton
Entity Address, State or Province	FL
Entity Address, Postal Zip Code	33431
City Area Code	212
Local Phone Number	356-9500
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Document Financial Statement Error Correction [Flag]	false
Entity Public Float			$ 276.5
Entity Common Stock, Shares Outstanding (in shares)		28,831,491
Entity Central Index Key	0001587987
Amendment Flag	false
Document Fiscal Year Focus	2025
Document Fiscal Period Focus	FY
Common Stock, par value $0.02 per share
Document Information [Line Items]
Title of 12(b) Security	Common Stock, par value $0.02 per share
Trading Symbol	NEWT
Security Exchange Name	NASDAQ
8.00% Notes due 2028
Document Information [Line Items]
Title of 12(b) Security	8.00% Notes due 2028
Trading Symbol	NEWTI
Security Exchange Name	NASDAQ
2029 8.50% Notes
Document Information [Line Items]
Title of 12(b) Security	8.50% Notes due 2029
Trading Symbol	NEWTG
Security Exchange Name	NASDAQ
2029 8.625% Notes
Document Information [Line Items]
Title of 12(b) Security	8.625% Notes due 2029
Trading Symbol	NEWTH
Security Exchange Name	NASDAQ
2031 8.50% Notes
Document Information [Line Items]
Title of 12(b) Security	8.50% Notes due 2031
Trading Symbol	NEWTO
Security Exchange Name	NASDAQ
Series B Preferred Stock, Depositary Shares
Document Information [Line Items]
Title of 12(b) Security	Depositary Shares, each representing a 1/40th interest in a share of 8.500% Fixed-Rate Reset Non-Cumulative Perpetual Preferred Stock, Series B
Trading Symbol	NEWTP
Security Exchange Name	NASDAQ