| Document and Entity Information | Sep. 28, 2021 |
| Document and Entity Information [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Sep. 28, 2021 |
| Entity File Number | 1-11588 |
| Entity Registrant Name | SAGA COMMUNICATIONS, INC |
| Entity Central Index Key | 0000886136 |
| Entity Tax Identification Number | 38-3042953 |
| Entity Incorporation, State or Country Code | FL |
| Entity Address, Address Line One | 73 Kercheval Avenue |
| Entity Address, City or Town | Grosse Pointe Farms |
| Entity Address State Or Province | MI |
| Entity Address, Postal Zip Code | 48236 |
| City Area Code | 313 |
| Local Phone Number | 886-7070 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Class A Common Stock, par value $0.01 per share |
| Trading Symbol | SGA |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
