Represents the number cellular partnerships the entity accounts for under the equity method of accounting

No definition available.

Name:	cnsl_EquityMethodInvestmentsNumberOfEntitysInvestments
Namespace Prefix:	cnsl_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Effect of the change in the value of the entity's partnership interests due to an accounting change made my the entity's partnerships.

+ References

No definition available.

+ Details

Name:	cnsl_NewAccountingPronouncementOrChangeInAccountingForPartnershipInterestsEquityIncreaseDecrease
Namespace Prefix:	cnsl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_InvestmentHoldingsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of distribution received from equity method investee for return of investment, classified as investing activities. Excludes distribution for return on investment, classified as operating activities.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 21D
-URI http://asc.fasb.org/extlink&oid=118932676&loc=SL94080555-108585

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585

+ Details

Name:	us-gaap_ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_AdjustmentsForNewAccountingPronouncementsAxis=us-gaap_AccountingStandardsUpdate201613Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

INVESTMENTS - Equity Method (Details) $ in Millions	3 Months Ended		6 Months Ended
INVESTMENTS - Equity Method (Details) $ in Millions	Jun. 30, 2020 USD ($) item	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) item	Jun. 30, 2019 USD ($)	Dec. 31, 2019 item
Investments
Number of entity's investments which is accounted for using equity method \| item	3		3		3
Cash distributions received from partnerships treated as equity method investees	$ 5.7	$ 5.6	$ 10.5	$ 9.6
ASU 2016-13
Investments
Adjustment of partnership interests	$ 0.2		$ 0.2