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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
--- | ---
Mar. 31, 2013 | Mar. 31, 2012
Condensed Financial Statements, Captions [Line Items] |  |
Revenue | $ 918,648 | $ 738,257
Costs of revenue, excluding depreciation and amortization | 791,499 | 652,247
Depreciation and amortization | 31,753 | 20,954
General and administrative expenses | 48,885 | 37,304
Interest expense (income), net | 10,045 | 8,951
Loss on extinguishment of debt | 5,624 | 0
Other (income) expense, net | (826) | (461)
Income (loss) from continuing operations before provision for income taxes | 31,668 | 19,499
(Provision for) benefit from income taxes | (12,348) | (7,804)
Income (loss) from continuing operations before non-controlling interests | 19,320 | 11,695
(Loss) income from discontinued operations, net of tax | (947) | 2,475
Equity in income from subsidiaries, net of tax | 0 | 0
Net income (loss) | 18,373 | 14,170
Net income (loss) attributable to non-controlling interests | 3 | (2)
Net income attributable to MasTec, Inc. | 18,370 | 14,172
Comprehensive income (loss) | 17,770 | 15,539
Segment, Continuing Operations [Member] |  |
Condensed Financial Statements, Captions [Line Items] |  |
Revenue | 918,600 | 738,300
Depreciation and amortization | 31,753 | 20,717
Interest expense (income), net | 10,000 | 9,000
MasTec, Inc. [Member] |  |
Condensed Financial Statements, Captions [Line Items] |  |
Revenue | 0 | 0
Costs of revenue, excluding depreciation and amortization | 0 | 0
General and administrative expenses | 331 | 108
Interest expense (income), net | 0 | 0
Loss on extinguishment of debt | 0 |
Other (income) expense, net | 0 | 0
Income (loss) from continuing operations before provision for income taxes | (331) | (108)
(Provision for) benefit from income taxes | (132) | 44
Income (loss) from continuing operations before non-controlling interests | (463) | (64)
(Loss) income from discontinued operations, net of tax | 0 | 0
Equity in income from subsidiaries, net of tax | 18,837 | 14,234
Net income (loss) | 18,374 | 14,170
Net income (loss) attributable to non-controlling interests | 0 | 0
Net income attributable to MasTec, Inc. | 18,374 | 14,170
Comprehensive income (loss) | 18,374 | 14,170
MasTec, Inc. [Member] | Segment, Continuing Operations [Member] |  |
Condensed Financial Statements, Captions [Line Items] |  |
Depreciation and amortization | 0 | 0
Guarantor Subsidiaries [Member] |  |
Condensed Financial Statements, Captions [Line Items] |  |
Revenue | 854,524 | 670,557
Costs of revenue, excluding depreciation and amortization | 735,801 | 593,750
General and administrative expenses | 46,060 | 34,833
Interest expense (income), net | 10,047 | 8,954
Loss on extinguishment of debt | 5,624 |
Other (income) expense, net | (836) | (465)
Income (loss) from continuing operations before provision for income taxes | 26,698 | 13,335
(Provision for) benefit from income taxes | (10,113) | (6,170)
Income (loss) from continuing operations before non-controlling interests | 16,585 | 7,165
(Loss) income from discontinued operations, net of tax | (730) | 3,245
Equity in income from subsidiaries, net of tax | 0 | 0
Net income (loss) | 15,855 | 10,410
Net income (loss) attributable to non-controlling interests | 3 | 0
Net income attributable to MasTec, Inc. | 15,852 | 10,410
Comprehensive income (loss) | 16,076 | 10,656
Guarantor Subsidiaries [Member] | Segment, Continuing Operations [Member] |  |
Condensed Financial Statements, Captions [Line Items] |  |
Depreciation and amortization | 31,130 | 20,150
Non-Guarantor Subsidiaries [Member] |  |
Condensed Financial Statements, Captions [Line Items] |  |
Revenue | 64,124 | 67,700
Costs of revenue, excluding depreciation and amortization | 55,698 | 58,497
General and administrative expenses | 2,494 | 2,363
Interest expense (income), net | (2) | (3)
Loss on extinguishment of debt | 0 |
Other (income) expense, net | 10 | 4
Income (loss) from continuing operations before provision for income taxes | 5,301 | 6,272
(Provision for) benefit from income taxes | (2,103) | (1,678)
Income (loss) from continuing operations before non-controlling interests | 3,198 | 4,594
(Loss) income from discontinued operations, net of tax | (217) | (770)
Equity in income from subsidiaries, net of tax | 0 | 0
Net income (loss) | 2,981 | 3,824
Net income (loss) attributable to non-controlling interests | 0 | (2)
Net income attributable to MasTec, Inc. | 2,981 | 3,826
Comprehensive income (loss) | 2,157 | 4,947
Non-Guarantor Subsidiaries [Member] | Segment, Continuing Operations [Member] |  |
Condensed Financial Statements, Captions [Line Items] |  |
Depreciation and amortization | 623 | 567
Consolidation, Eliminations [Member] |  |
Condensed Financial Statements, Captions [Line Items] |  |
Revenue | 0 | 0
Costs of revenue, excluding depreciation and amortization | 0 | 0
General and administrative expenses | 0 | 0
Interest expense (income), net | 0 | 0
Loss on extinguishment of debt | 0 |
Other (income) expense, net | 0 | 0
Income (loss) from continuing operations before provision for income taxes | 0 | 0
(Provision for) benefit from income taxes | 0 | 0
Income (loss) from continuing operations before non-controlling interests | 0 | 0
(Loss) income from discontinued operations, net of tax | 0 | 0
Equity in income from subsidiaries, net of tax | (18,837) | (14,234)
Net income (loss) | (18,837) | (14,234)
Net income (loss) attributable to non-controlling interests | 0 | 0
Net income attributable to MasTec, Inc. | (18,837) | (14,234)
Comprehensive income (loss) | (18,837) | (14,234)
Consolidation, Eliminations [Member] | Segment, Continuing Operations [Member] |  |
Condensed Financial Statements, Captions [Line Items] |  |
Depreciation and amortization | $ 0 | $ 0

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