| Document and Entity Information | Jan. 24, 2022 |
| Document and Entity Information [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Jan. 24, 2022 |
| Entity File Number | 000-51446 |
| Entity Registrant Name | CONSOLIDATED COMMUNICATIONS HOLDINGS, INC. |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 02-0636095 |
| Entity Address, Address Line One | 2116 South 17th Street |
| Entity Address, City or Town | Mattoon |
| Entity Address, State or Province | IL |
| Entity Address, Postal Zip Code | 61938 |
| City Area Code | 217 |
| Local Phone Number | 235-3311 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock – $0.01 par value |
| Trading Symbol | CNSL |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001304421 |
| Amendment Flag | false |
