XML 108 R101.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Concentrations Of Risk (Narrative) (Details) | 6 Months Ended
--- | ---
Jun. 30, 2013 customer
Risks and Uncertainties [Abstract] |
Number Of Customers | 370

X
- Definition Number Of Customers + References No definition available. + Details
Name: | mtz_NumberOfCustomers1
Namespace Prefix: | mtz_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RisksAndUncertaintiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration