Debt, Secured with a Cross Default Feature

No definition available.

Name:	cvti_DebtSecuredWithACrossDefaultFeature
Namespace Prefix:	cvti_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The availability of line of credit facility as percentage of the revolver commitment.

+ References

No definition available.

+ Details

Name:	cvti_LineOfCreditFacilityAvailabilityAsPercentageOfRevolverCommitment
Namespace Prefix:	cvti_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The line of credit facility's availability block which was eliminated when the 8th amendment was entered.

+ References

No definition available.

+ Details

Name:	cvti_LineOfCreditFacilityAvailabilityBlockRemoved
Namespace Prefix:	cvti_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line of credit facility's maximum increase in borrowing capacity as long as no event of default exists.

+ References

No definition available.

+ Details

Name:	cvti_LineOfCreditFacilityMaximumIncreaseInBorrowingCapacity
Namespace Prefix:	cvti_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The revolver commitment amount

+ References

No definition available.

+ Details

Name:	cvti_LineOfCreditFacilityRevolverCommitmentAmount
Namespace Prefix:	cvti_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The maximum stock repurchase aggregate amount allowed pursuant to the credit facility agreement.

+ References

No definition available.

+ Details

Name:	cvti_MaximumStockRepurchaseAggregateAmountAllowedPursuantToCreditFacilityAgreement
Namespace Prefix:	cvti_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	cvti_Note7DebtDetailsLineItems
Namespace Prefix:	cvti_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The percent of the lenders' aggregate commitments under the credit facility.

+ References

No definition available.

+ Details

Name:	cvti_PercentOfAggregateCommitmentsUnderCreditFacility
Namespace Prefix:	cvti_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percent of appraised fair market value of eligible real estate used in the calculation of borrowing base.

+ References

No definition available.

+ Details

Name:	cvti_PercentOfAppraisedFairMarketValueOfEligibleRealEstate
Namespace Prefix:	cvti_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The percent of appraised net orderly liquidation value of eligible revenue equipment used in the calculation of borrowing base.

+ References

No definition available.

+ Details

Name:	cvti_PercentOfAppraisedNetOrderlyLiquidationValueOfEligibleRevenueEquipment
Namespace Prefix:	cvti_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percent of the eligible accounts receivable used in the calculation of borrowing base.

+ References

No definition available.

+ Details

Name:	cvti_PercentOfEligibleAccountsReceivable
Namespace Prefix:	cvti_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percent of net book value of eligible revenue equipment used in the calculation of borrowing base.

+ References

No definition available.

+ Details

Name:	cvti_PercentOfNetBookValueOfEligibleRevenueEquipment
Namespace Prefix:	cvti_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Carrying amount as of the balance sheet date of the asset arising from commodity contracts such as futures contracts tied to the movement of a particular commodity, which are expected to be converted into cash or otherwise disposed of within a year or the normal operating cycle, if longer.

+ References

+ Details

Name:	us-gaap_CommodityContractAssetCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of the fee that accompanies borrowing money under the debt instrument.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentFeeAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

+ Details

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

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

Name:	us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20, 22

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

Name:	us-gaap_LineOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The effective interest rate at the end of the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

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

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Note 7 - Debt (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended	9 Months Ended							9 Months Ended					9 Months Ended				1 Months Ended				9 Months Ended
	Jan. 29, 2013	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2008	Sep. 30, 2014 Fuel [Member]	Jan. 29, 2013 Transport Enterprise Leasing, LLC [Member] Eighth Amendment [Member] Maximum [Member]	May 31, 2011 Transport Enterprise Leasing, LLC [Member]	Jan. 29, 2013 Eighth Amendment [Member]	Sep. 30, 2014 Base Rate Loans [Member] Federal Funds Rate [Member]	Sep. 30, 2014 Base Rate Loans [Member] London Interbank Offered Rate (LIBOR) [Member]	Sep. 30, 2014 Base Rate Loans [Member] Applicable Margin [Member] Maximum [Member]	Sep. 30, 2014 Base Rate Loans [Member] Applicable Margin [Member] Minimum [Member]	Sep. 30, 2014 Base Rate Loans [Member]	Sep. 30, 2014 LIBOR [Member] Applicable Margin [Member] Maximum [Member]	Sep. 30, 2014 LIBOR [Member] Applicable Margin [Member] Minimum [Member]	Sep. 30, 2014 Letter of Credit [Member]	Sep. 30, 2014 Swing Line Sub Facility [Member]	Jan. 29, 2013 When Availability Is Less Than $50 Million [Member]	Jan. 29, 2013 When Availability Is At Least $50 Million [Member]	Jan. 29, 2013 Testing of Fixed Charge Coverage Ratio Covenant [Member]	Jan. 29, 2013 Cash Dominion Applies [Member]	Sep. 30, 2014 Maximum [Member]	Sep. 30, 2014 Minimum [Member]
Note 7 - Debt (Details) [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity (in Dollars)				$ 85.0				$ 95.0								$ 85.0	$ 10.0
Line Of Credit Facility, Maximum Increase In Borrowing Capacity (in Dollars)		50.0
Percent of Aggregate Commitments Under Credit Facility		10.00%
Line of Credit Facility, Availability Block Removed (in Dollars)	15.0
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage																		0.375%	0.50%	12.50%		2.25%	1.50%
Line Of Credit Facility, Revolver Commitment Amount (in Dollars)		25.0																		11.9	14.3
Line Of Credit Facility, Availability As Percentage Of Revolver Commitment		35.00%																			15.00%
Maximum Stock Repurchase Aggregate Amount Allowed Pursuant To Credit Facility Agreement (in Dollars)	5.0
Equity Method Investment, Ownership Percentage						51.00%	49.00%
Debt Instrument, Fee Amount (in Dollars)			0.3
Debt Instrument, Basis Spread on Variable Rate									0.50%	1.00%	1.25%	0.50%		0.50%	0.375%
Percent Of Eligible Accounts Receivable		85.00%
Percent of Appraised Net Orderly Liquidation Value of Eligible Revenue Equipment		85.00%
Percent of Net Book Value of Eligible Revenue Equipment		95.00%
Percent Of Appraised Fair Market Value Of Eligible Real Estate		65.00%
Long-term Line of Credit (in Dollars)																						0.1
Letters of Credit Outstanding, Amount (in Dollars)		34.8	39.0
Line of Credit Facility, Remaining Borrowing Capacity (in Dollars)		52.6
Line of Credit Facility, Interest Rate at Period End													4.25%
Debt, Secured with a Cross Default Feature (in Dollars)		185.7
Commodity Contract Asset, Current (in Dollars)					$ 1.4