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Supplemental Guarantor Financial Information (Condensed Unaudited Consolidating Statements of Operations and Comprehensive Income) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014
Condensed Unaudited Consolidating Statements of Operations and Comprehensive Income [Line Items] |  |  |  |
Revenue | $ 1,111,010 | $ 1,315,488 | $ 3,180,906 | $ 3,380,538
Costs of revenue, excluding depreciation and amortization | 972,711 | 1,122,861 | 2,805,072 | 2,914,901
Depreciation and amortization | 42,196 | 41,747 | 128,048 | 111,996
General and administrative expenses | 63,798 | 59,889 | 207,077 | 167,454
Interest expense (income), net | 11,964 | 12,643 | 35,845 | 37,595
Other expense (income), net | 6,702 | (1,416) | 4,342 | (5,424)
Income from continuing operations before income taxes | 13,639 | 79,764 | 522 | 154,016
Benefit from (provision for) income taxes | (6,197) | (30,319) | (3,288) | (58,569)
Net income (loss) from continuing operations | 7,442 | 49,445 | (2,766) | 95,447
Net loss from discontinued operations | 0 | (320) | 0 | (592)
Equity in income (loss) from subsidiaries, net of tax | 0 | 0 | 0 | 0
Net income (loss) | 7,442 | 49,125 | (2,766) | 94,855
Net (loss) income attributable to non-controlling interests | (176) | 139 | (420) | 48
Net income (loss) attributable to MasTec, Inc. | 7,618 | 48,986 | (2,346) | 94,807
Comprehensive (loss) income | (5,888) | 36,174 | (34,816) | 84,244
Reportable Legal Entities [Member] | MasTec, Inc. [Member] |  |  |  |
Condensed Unaudited Consolidating Statements of Operations and Comprehensive Income [Line Items] |  |  |  |
Revenue | 0 | 0 | 0 | 0
Costs of revenue, excluding depreciation and amortization | 0 | 0 | 0 | 0
Depreciation and amortization | 0 | 0 | 0 | 0
General and administrative expenses | 700 | 600 | 1,900 | 1,800
Interest expense (income), net | 0 | 0 | 0 | 0
Other expense (income), net | 0 | 0 | 0 | 0
Income from continuing operations before income taxes | (700) | (600) | (1,900) | (1,800)
Benefit from (provision for) income taxes | 300 | 200 | 800 | 700
Net income (loss) from continuing operations | (400) | (400) | (1,100) | (1,100)
Net loss from discontinued operations |  | 0 |  | 0
Equity in income (loss) from subsidiaries, net of tax | 8,000 | 49,300 | (1,300) | 95,900
Net income (loss) | 7,600 | 48,900 | (2,400) | 94,800
Net (loss) income attributable to non-controlling interests | 0 | 0 | 0 | 0
Net income (loss) attributable to MasTec, Inc. | 7,600 | 48,900 | (2,400) | 94,800
Comprehensive (loss) income | (5,700) | 36,000 | (34,400) | 84,200
Reportable Legal Entities [Member] | Guarantor Subsidiaries [Member] |  |  |  |
Condensed Unaudited Consolidating Statements of Operations and Comprehensive Income [Line Items] |  |  |  |
Revenue | 963,700 | 1,050,500 | 2,657,900 | 2,802,300
Costs of revenue, excluding depreciation and amortization | 841,900 | 893,000 | 2,309,400 | 2,402,600
Depreciation and amortization | 33,200 | 30,800 | 98,100 | 88,400
General and administrative expenses | 57,000 | 50,800 | 184,900 | 146,700
Interest expense (income), net | 27,700 | 11,500 | 82,900 | 35,600
Other expense (income), net | 6,000 | (1,700) | 400 | (5,900)
Income from continuing operations before income taxes | (2,100) | 66,100 | (17,800) | 134,900
Benefit from (provision for) income taxes | 1,300 | (24,200) | 7,900 | (52,000)
Net income (loss) from continuing operations | (800) | 41,900 | (9,900) | 82,900
Net loss from discontinued operations |  | 0 |  | 0
Equity in income (loss) from subsidiaries, net of tax | 0 | 0 | 0 | 0
Net income (loss) | (800) | 41,900 | (9,900) | 82,900
Net (loss) income attributable to non-controlling interests | 0 | 0 | 0 | 0
Net income (loss) attributable to MasTec, Inc. | (800) | 41,900 | (9,900) | 82,900
Comprehensive (loss) income | (800) | 41,900 | (9,900) | 83,000
Reportable Legal Entities [Member] | Non-Guarantor Subsidiaries [Member] |  |  |  |
Condensed Unaudited Consolidating Statements of Operations and Comprehensive Income [Line Items] |  |  |  |
Revenue | 149,900 | 267,000 | 530,200 | 580,300
Costs of revenue, excluding depreciation and amortization | 133,400 | 231,900 | 502,900 | 514,400
Depreciation and amortization | 9,000 | 10,900 | 29,900 | 23,600
General and administrative expenses | 6,100 | 8,500 | 20,300 | 19,000
Interest expense (income), net | (15,700) | 1,100 | (47,100) | 2,000
Other expense (income), net | 700 | 300 | 4,000 | 400
Income from continuing operations before income taxes | 16,400 | 14,300 | 20,200 | 20,900
Benefit from (provision for) income taxes | (7,800) | (6,400) | (12,000) | (7,300)
Net income (loss) from continuing operations | 8,600 | 7,900 | 8,200 | 13,600
Net loss from discontinued operations |  | (300) |  | (500)
Equity in income (loss) from subsidiaries, net of tax | 0 | 0 | 0 | 0
Net income (loss) | 8,600 | 7,600 | 8,200 | 13,100
Net (loss) income attributable to non-controlling interests | (200) | 100 | (500) | (100)
Net income (loss) attributable to MasTec, Inc. | 8,800 | 7,500 | 8,700 | 13,200
Comprehensive (loss) income | (4,800) | (5,300) | (23,700) | 2,400
Eliminations [Member] |  |  |  |
Condensed Unaudited Consolidating Statements of Operations and Comprehensive Income [Line Items] |  |  |  |
Revenue | (2,600) | (2,000) | (7,200) | (2,100)
Costs of revenue, excluding depreciation and amortization | (2,600) | (2,000) | (7,200) | (2,100)
Depreciation and amortization | 0 | 0 | 0 | 0
General and administrative expenses | 0 | 0 | 0 | 0
Interest expense (income), net | 0 | 0 | 0 | 0
Other expense (income), net | 0 | 0 | 0 | 0
Income from continuing operations before income taxes | 0 | 0 | 0 | 0
Benefit from (provision for) income taxes | 0 | 0 | 0 | 0
Net income (loss) from continuing operations | 0 | 0 | 0 | 0
Net loss from discontinued operations |  | 0 |  | 0
Equity in income (loss) from subsidiaries, net of tax | (8,000) | (49,300) | 1,300 | (95,900)
Net income (loss) | (8,000) | (49,300) | 1,300 | (95,900)
Net (loss) income attributable to non-controlling interests | 0 | 0 | 0 | 0
Net income (loss) attributable to MasTec, Inc. | (8,000) | (49,300) | 1,300 | (95,900)
Comprehensive (loss) income | $ 5,400 | $ (36,400) | $ 33,300 | $ (85,300)

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