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	$ 24,813us-gaap_LeaseAndRentalExpense	$ 27,397us-gaap_LeaseAndRentalExpense	$ 24,139us-gaap_LeaseAndRentalExpense
Revenue Equipment [Member]
Note 8 - Leases (Details) - Summary of Rental Expense [Line Items]
Rental expense	20,935us-gaap_LeaseAndRentalExpense / us-gaap_PropertyPlantAndEquipmentByTypeAxis = cvti_RevenueEquipmentMember	22,991us-gaap_LeaseAndRentalExpense / us-gaap_PropertyPlantAndEquipmentByTypeAxis = cvti_RevenueEquipmentMember	19,746us-gaap_LeaseAndRentalExpense / us-gaap_PropertyPlantAndEquipmentByTypeAxis = cvti_RevenueEquipmentMember
Land and Building [Member]
Note 8 - Leases (Details) - Summary of Rental Expense [Line Items]
Rental expense	3,561us-gaap_LeaseAndRentalExpense / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_LandAndBuildingMember	4,044us-gaap_LeaseAndRentalExpense / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_LandAndBuildingMember	3,714us-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	$ 317us-gaap_LeaseAndRentalExpense / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_OtherMachineryAndEquipmentMember	$ 362us-gaap_LeaseAndRentalExpense / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_OtherMachineryAndEquipmentMember	$ 679us-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: