| Document and Entity Information Document | Dec. 31, 2020 |
| Document Information [Line Items] | |
| Document Type | 8-K |
| Document Period End Date | Dec. 31, 2020 |
| Entity Registrant Name | The Hillman Companies, Inc. |
| Entity Central Index Key | 0001029831 |
| Amendment Flag | false |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-13293 |
| Entity Tax Identification Number | 23-2874736 |
| Entity Address, Address Line One | 10590 Hamilton Avenue |
| Entity Address, City or Town | Cincinnati |
| Entity Address, State or Province | OH |
| Entity Address, Postal Zip Code | 45231 |
| City Area Code | 513 |
| Local Phone Number | 851-4900 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
