XML 62 R59.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Note 8 - Leases (Details) - Summary of Rental Expense (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Note 8 - Leases (Details) - Summary of Rental Expense [Line Items] |  |  |
Rental expense | $ 24,813 us-gaap_LeaseAndRentalExpense | $ 27,397 us-gaap_LeaseAndRentalExpense | $ 24,139 us-gaap_LeaseAndRentalExpense
Revenue Equipment [Member] |  |  |
Note 8 - Leases (Details) - Summary of Rental Expense [Line Items] |  |  |
Rental expense | 20,935 us-gaap_LeaseAndRentalExpense / us-gaap_PropertyPlantAndEquipmentByTypeAxis = cvti_RevenueEquipmentMember | 22,991 us-gaap_LeaseAndRentalExpense / us-gaap_PropertyPlantAndEquipmentByTypeAxis = cvti_RevenueEquipmentMember | 19,746 us-gaap_LeaseAndRentalExpense / us-gaap_PropertyPlantAndEquipmentByTypeAxis = cvti_RevenueEquipmentMember
Land and Building [Member] |  |  |
Note 8 - Leases (Details) - Summary of Rental Expense [Line Items] |  |  |
Rental expense | 3,561 us-gaap_LeaseAndRentalExpense / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_LandAndBuildingMember | 4,044 us-gaap_LeaseAndRentalExpense / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_LandAndBuildingMember | 3,714 us-gaap_LeaseAndRentalExpense / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_LandAndBuildingMember
Other Machinery and Equipment [Member] |  |  |
Note 8 - Leases (Details) - Summary of Rental Expense [Line Items] |  |  |
Rental expense | $ 317 us-gaap_LeaseAndRentalExpense / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_OtherMachineryAndEquipmentMember | $ 362 us-gaap_LeaseAndRentalExpense / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_OtherMachineryAndEquipmentMember | $ 679 us-gaap_LeaseAndRentalExpense / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_OtherMachineryAndEquipmentMember

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

X
- 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

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=cvti_RevenueEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_LandAndBuildingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_OtherMachineryAndEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |