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Supplemental Guarantor Financial Information (Condensed Unaudited Consolidating Statements Of Operations And Comprehensive Income) (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Revenue | $ 977,624 | $ 988,874 | $ 1,896,272 | $ 1,727,131
Costs of revenue, excluding depreciation and amortization | 822,655 | 868,504 | 1,614,154 | 1,520,752
Depreciation and amortization |  |  | 65,355 | 42,946
General and administrative expenses | 51,900 | 38,374 | 100,785 | 75,678
Interest expense (income), net | 11,838 | 9,487 | 21,883 | 18,438
Loss on extinguishment of debt | 0 | 0 | 5,624 | 0
Other expense (income) , net | 322 | (366) | (504) | (827)
Income from continuing operations before provision for income taxes | 57,307 | 51,112 | 88,975 | 70,610
Provision for (benefit from ) income taxes | (21,776) | (19,948) | (34,124) | (27,751)
Income from continuing operations before non-controlling interests | 35,531 | 31,164 | 54,851 | 42,859
(Loss) income from discontinued operations, net of tax | (484) | (1,075) | (1,431) | 1,399
Equity in income from subsidiaries, net of tax | 0 | 0 | 0 | 0
Net income | 35,047 | 30,089 | 53,420 | 44,258
Net income (loss) attributable to non-controlling interests | 106 | (3) | 109 | (6)
Net income attributable to MasTec, Inc. | 34,941 | 30,092 | 53,311 | 44,264
Comprehensive income (loss) | 28,408 | 28,799 | 46,179 | 44,338
Segment, Continuing Operations [Member] |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Revenue | 977,600 | 988,900 | 1,896,300 | 1,727,100
Depreciation and amortization | 33,602 | 21,763 | 65,355 | 42,480
Interest expense (income), net | 11,800 | 9,500 | 21,900 | 18,400
MasTec, Inc. [Member] |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Revenue | 0 | 0 | 0 | 0
Costs of revenue, excluding depreciation and amortization | 0 | 0 |  | 0
General and administrative expenses | 655 | 641 | 986 | 749
Interest expense (income), net | 0 | 0 | 0 | 0
Loss on extinguishment of debt |  |  | 0 |
Other expense (income) , net | 0 | 0 | 0 | 0
Income from continuing operations before provision for income taxes | (656) | (641) | (987) | (750)
Provision for (benefit from ) income taxes | 530 | 265 | 398 | 309
Income from continuing operations before non-controlling interests | (126) | (376) | (589) | (441)
(Loss) income from discontinued operations, net of tax | 0 | 0 | 0 | 0
Equity in income from subsidiaries, net of tax | 35,173 | 30,465 | 54,009 | 44,699
Net income | 35,047 | 30,089 | 53,420 | 44,258
Net income (loss) attributable to non-controlling interests | 0 | 0 | 0 | 0
Net income attributable to MasTec, Inc. | 35,047 | 30,089 | 53,420 | 44,258
Comprehensive income (loss) | 35,047 | 30,089 | 53,420 | 44,258
MasTec, Inc. [Member] | Segment, Continuing Operations [Member] |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Depreciation and amortization | 1 | 0 | 1 | 1
Guarantor Subsidiaries [Member] |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Revenue | 881,780 | 944,529 | 1,736,304 | 1,615,087
Costs of revenue, excluding depreciation and amortization | 746,253 | 831,595 | 1,482,054 | 1,425,346
General and administrative expenses | 44,300 | 35,283 | 90,360 | 70,115
Interest expense (income), net | 11,612 | 9,492 | 21,659 | 18,446
Loss on extinguishment of debt |  |  | 5,624 |
Other expense (income) , net | 621 | (578) | (215) | (1,042)
Income from continuing operations before provision for income taxes | 48,604 | 47,549 | 75,302 | 60,884
Provision for (benefit from ) income taxes | (17,829) | (19,032) | (27,942) | (25,202)
Income from continuing operations before non-controlling interests | 30,775 | 28,517 | 47,360 | 35,682
(Loss) income from discontinued operations, net of tax | 118 | (492) | (612) | 2,752
Equity in income from subsidiaries, net of tax | 0 | 0 | 0 | 0
Net income | 30,893 | 28,025 | 46,748 | 38,434
Net income (loss) attributable to non-controlling interests | 106 | 0 | 109 | 0
Net income attributable to MasTec, Inc. | 30,787 | 28,025 | 46,639 | 38,434
Comprehensive income (loss) | 30,205 | 27,730 | 46,282 | 38,385
Guarantor Subsidiaries [Member] | Segment, Continuing Operations [Member] |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Depreciation and amortization | 30,390 | 21,188 | 61,520 | 41,338
Non-Guarantor Subsidiaries [Member] |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Revenue | 95,844 | 44,345 | 159,968 | 112,044
Costs of revenue, excluding depreciation and amortization | 76,402 | 36,909 | 132,100 | 95,406
General and administrative expenses | 6,945 | 2,450 | 9,439 | 4,814
Interest expense (income), net | 226 | (5) | 224 | (8)
Loss on extinguishment of debt |  |  | 0 |
Other expense (income) , net | (299) | 212 | (289) | 215
Income from continuing operations before provision for income taxes | 9,359 | 4,204 | 14,660 | 10,476
Provision for (benefit from ) income taxes | (4,477) | (1,181) | (6,580) | (2,858)
Income from continuing operations before non-controlling interests | 4,882 | 3,023 | 8,080 | 7,618
(Loss) income from discontinued operations, net of tax | (602) | (583) | (819) | (1,353)
Equity in income from subsidiaries, net of tax | 0 | 0 | 0 | 0
Net income | 4,280 | 2,440 | 7,261 | 6,265
Net income (loss) attributable to non-controlling interests | 0 | (3) | 0 | (6)
Net income attributable to MasTec, Inc. | 4,280 | 2,443 | 7,261 | 6,271
Comprehensive income (loss) | (1,671) | 1,445 | 486 | 6,394
Non-Guarantor Subsidiaries [Member] | Segment, Continuing Operations [Member] |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Depreciation and amortization | 3,211 | 575 | 3,834 | 1,141
Consolidation, Eliminations [Member] |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Revenue | 0 | 0 | 0 | 0
Costs of revenue, excluding depreciation and amortization | 0 | 0 | 0 | 0
General and administrative expenses | 0 | 0 | 0 | 0
Interest expense (income), net | 0 | 0 | 0 | 0
Loss on extinguishment of debt |  |  | 0 |
Other expense (income) , net | 0 | 0 | 0 | 0
Income from continuing operations before provision for income taxes | 0 | 0 | 0 | 0
Provision for (benefit from ) income taxes | 0 | 0 | 0 | 0
Income from continuing operations before non-controlling interests | 0 | 0 | 0 | 0
(Loss) income from discontinued operations, net of tax | 0 | 0 | 0 | 0
Equity in income from subsidiaries, net of tax | (35,173) | (30,465) | (54,009) | (44,699)
Net income | (35,173) | (30,465) | (54,009) | (44,699)
Net income (loss) attributable to non-controlling interests | 0 | 0 | 0 | 0
Net income attributable to MasTec, Inc. | (35,173) | (30,465) | (54,009) | (44,699)
Comprehensive income (loss) | (35,173) | (30,465) | (54,009) | (44,699)
Consolidation, Eliminations [Member] | Segment, Continuing Operations [Member] |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Depreciation and amortization | $ 0 | $ 0 | $ 0 |

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