Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2021	Feb. 28, 2022	Jun. 30, 2021
Document and Entity Information
Document Type	10-K
Document Annual Report	true
Document Transition Report	false
Document Period End Date	Dec. 31, 2021
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 Central Index Key	0001304421
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
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Title of 12(b) Security	Common Stock - $0.01 par value
Trading Symbol	CNSL
Security Exchange Name	NASDAQ
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Amendment Flag	false
Entity Public Float			$ 639,629,085
Entity Common Stock, Shares Outstanding		113,612,846
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Auditor Name	Ernst & Young LLP
Auditor Firm ID	42
Auditor Location	St. Louis, Missouri