XML 56 R43.htm IDEA: XBRL DOCUMENT v3.19.2

Note 10 - Goodwill and Other Assets (Details Textual)	6 Months Ended
	Jun. 30, 2019	Jul. 03, 2018
Finite-Lived Intangible Asset, Useful Life	12 years 30 days
Landair Holdings Inc [Member]
Business Acquisition, Percentage of Voting Interests Acquired		100.00%

X

- Definition

Percentage of voting equity interests acquired at the acquisition date in the business combination.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_BusinessAcquisitionAxis=cvti_LandairHoldingsIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: