| Cover | Dec. 14, 2023 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Dec. 14, 2023 |
| Entity Registrant Name | Sterling Check Corp. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-40829 |
| Entity Tax Identification Number | 37-1784336 |
| Entity Address, Address Line One | 6150 Oak Tree Boulevard, Suite 490 |
| Entity Address, City or Town | Independence |
| Entity Address, State or Province | OH |
| Entity Address, Postal Zip Code | 44131 |
| City Area Code | 800 |
| Local Phone Number | 853-3228 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common stock, par value $0.01 per share |
| Trading Symbol | STER |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Entity Central Index Key | 0001645070 |
| Amendment Flag | false |
