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Note 8 - Leases (Details) - Summary of Rental Expense (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Note 8 - Leases (Details) - Summary of Rental Expense [Line Items] |  |  |
Rental expense | $ 27,397 | $ 24,139 | $ 19,442
Revenue Equipment [Member] |  |  |
Note 8 - Leases (Details) - Summary of Rental Expense [Line Items] |  |  |
Rental expense | 22,991 | 19,746 | 15,364
Land and Building [Member] |  |  |
Note 8 - Leases (Details) - Summary of Rental Expense [Line Items] |  |  |
Rental expense | 4,044 | 3,714 | 3,266
Other Machinery and Equipment [Member] |  |  |
Note 8 - Leases (Details) - Summary of Rental Expense [Line Items] |  |  |
Rental expense | $ 362 | $ 679 | $ 812

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- Details
Name: | cvti_Note8LeasesDetailsSummaryofRentalExpenseLineItems
Namespace Prefix: | cvti_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References No definition available. + Details
Name: | us-gaap_LeaseAndRentalExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration