XML 42 R53.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Note 14 - Commitments and Contingencies (Details) (USD $) | Dec. 31, 2014
--- | ---
Note 14 - Commitments and Contingencies (Details) [Line Items] |
Operating Leases, Future Minimum Payments Due | $ 866,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDue
Revenue Equipment Expenditure [Member] |
Note 14 - Commitments and Contingencies (Details) [Line Items] |
Contractual Obligation, Due in Next Twelve Months | 80,400,000 us-gaap_ContractualObligationDueInNextTwelveMonths / us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis = mrtn_RevenueEquipmentExpenditureMember
Building Construction and Acquisition Expenditures [Member] |
Note 14 - Commitments and Contingencies (Details) [Line Items] |
Contractual Obligation, Due in Next Twelve Months | $ 6,500,000 us-gaap_ContractualObligationDueInNextTwelveMonths / us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis = mrtn_BuildingConstructionAndAcquisitionExpendituresMember

X
- Details
Name: | mrtn_Note14CommitmentsandContingenciesDetailsLineItems
Namespace Prefix: | mrtn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of contractual obligation maturing in the next fiscal year following the latest fiscal year. + References No definition available. + Details
Name: | us-gaap_ContractualObligationDueInNextTwelveMonths
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 + Details
Name: | us-gaap_OperatingLeasesFutureMinimumPaymentsDue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis=mrtn_BuildingConstructionAndAcquisitionExpendituresMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis=mrtn_RevenueEquipmentExpenditureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |