XML 77 R63.htm IDEA: XBRL DOCUMENT
v3.3.1.900

Note 18 - Deferred Income Taxes Reclassification (Details Textual) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2014 USD ($)
Reclassification of Deferred Income Tax Asset Current to Noncurrent [Member] | Year Ended December 31 2014 [Member] |
Prior Period Reclassification Adjustment | $ 3.2

X
- Definition The amount of a reclassification adjustment made to prior period financial statement amounts. + References No definition available. + Details
Name: | us-gaap_PriorPeriodReclassificationAdjustment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_NewAccountingPronouncementEarlyAdoptionAxis=mrtn_ReclassificationOfDeferredIncomeTaxAssetCurrentToNoncurrentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreationDateAxis=mrtn_November302015Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |