XML 96 R64.htm IDEA: XBRL DOCUMENT
v3.3.0.814

Debt (4.875% Senior Notes) (Narrative) (Details) - 4.875% Senior Notes [Member] - Senior Notes [Member] - USD ($) | 3 Months Ended |
--- | --- | ---
Jun. 30, 2015 | Sep. 30, 2015
Debt Instrument [Line Items] |  |
Debt instrument, aggregate principal amount (in dollars) |  | $ 400,000,000
Debt instrument, interest rate (percentage) |  | 4.875%
Debt instrument, cure period (in days) | 60 days |
Debt instrument, consent fee, percentage of principal amount, note holders | 0.25% |
Debt instrument, payments for consent fee, note holders (in dollars) | $ 900,000 |
Debt instrument, consent fee, percentage of principal amount, solicitation agent | 0.20% |
Interest Expense [Member] |  |
Debt Instrument [Line Items] |  |
Debt instrument, payments for consent fee, solicitation agent (in dollars) | $ 800,000 |

X
- Definition The amount, expressed in terms of basis points, or percentage points, paid to debt holders to obtain a consent pertaining to a debt instrument. + References No definition available. + Details
Name: | mtz_ConsentFeePercentageOfPrincipalAmountNoteHolders
Namespace Prefix: | mtz_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount, expressed in terms of basis points, or percentage points, paid to a solicitation agent to obtain a consent pertaining to a financial instrument. + References No definition available. + Details
Name: | mtz_ConsentFeePercentageOfPrincipalAmountSolicitationAgent
Namespace Prefix: | mtz_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The maximum period of time within which the cause of a potential event of default on a debt instrument can be cured by the debt holder, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | mtz_DebtInstrumentCurePeriod
Namespace Prefix: | mtz_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount paid to debt holders to obtain a consent pertaining to a debt instrument. + References No definition available. + Details
Name: | mtz_PaymentsForConsentFeeNoteHolders
Namespace Prefix: | mtz_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount paid to a solicitation agent to obtain a consent pertaining to a financial instrument. + References No definition available. + Details
Name: | mtz_PaymentsforConsentFeeSolicitationAgent
Namespace Prefix: | mtz_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 + Details
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + 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 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DebtInstrumentAxis=mtz_FourPointEightSevenFivePercentSeniorNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_InterestExpenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |