| Document and Entity Information | Dec. 04, 2020 |
| Cover [Abstract] | |
| Entity Registrant Name | Addus HomeCare Corp |
| Amendment Flag | false |
| Entity Central Index Key | 0001468328 |
| Document Type | 8-K |
| Document Period End Date | Dec. 4, 2020 |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-34504 |
| Entity Tax Identification Number | 20-5340172 |
| Entity Address, Address Line One | 6303 Cowboys Way |
| Entity Address, Address Line Two | Suite 600 |
| Entity Address, City or Town | Frisco |
| Entity Address, State or Province | TX |
| Entity Address, Postal Zip Code | 75034 |
| City Area Code | (469) |
| Local Phone Number | 535-8200 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, $0.001 par value per share |
| Trading Symbol | ADUS |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
