| Cover | Feb. 07, 2023 |
| Document Information [Line Items] | |
| Document Type | 8-K |
| Document Period End Date | Feb. 07, 2023 |
| Current Fiscal Year End Date | --12-31 |
| Entity Registrant Name | NEWTEKONE, INC. |
| Entity Incorporation, State or Country Code | MD |
| Securities Act File Number | 001-36742 |
| 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Amendment Flag | false |
| Entity Central Index Key | 0001587987 |
| 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 |
| 5.75% Notes due 2024 | |
| Document Information [Line Items] | |
| Title of 12(b) Security | 5.75% Notes due 2024 |
| Trading Symbol | NEWTL |
| Security Exchange Name | NASDAQ |
| 5.50% Notes due 2026 | |
| Document Information [Line Items] | |
| Title of 12(b) Security | 5.50% Notes due 2026 |
| Trading Symbol | NEWTZ |
| Security Exchange Name | NASDAQ |
