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Quarterly Results of Operations (Unaudited) (Details) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Quarterly Results of Operations (Unaudited) |  |  |  |  |  |  |  |  |  |  |
Revenue | $ 315,870,000 | $ 335,241,000 | $ 353,172,000 | $ 326,902,000 | $ 313,851,000 | $ 322,002,000 | $ 306,417,000 | $ 274,384,000 | $ 1,331,185,000 | $ 1,216,654,000 | $ 1,063,520,000
Gross profit | 55,073,000 | 55,521,000 | 54,096,000 | 42,931,000 | 50,465,000 | 49,006,000 | 47,895,000 | 34,164,000 | 207,621,000 | 181,530,000 | 189,931,000
Operating income (loss) | 8,098,000 | 9,767,000 | 7,441,000 | (3,003,000) | 4,745,000 | (46,731,000) | 6,815,000 | (7,470,000) | 22,303,000 | (42,641,000) | 31,442,000
Income (loss) from continuing operations | 4,553,000 | 5,423,000 | 3,949,000 | (2,431,000) | 4,617,000 | (36,614,000) | 4,172,000 | (4,649,000) | 11,494,000 | (32,474,000) | 20,564,000
Income (loss) from discontinued operations, net of tax | 592,000 | (98,000) | 98,000 | (237,000) | (2,532,000) | 45,000 | (1,010,000) | (521,000) | 355,000 | (4,018,000) | (6,547,000)
NET INCOME (LOSS) INCLUDING NONCONTROLLING INTERESTS | 5,145,000 | 5,325,000 | 4,047,000 | (2,668,000) | 2,085,000 | (36,569,000) | 3,162,000 | (5,170,000) | 11,849,000 | (36,492,000) | 14,740,000
Less: Net income (loss) attributable to noncontrolling interests | 794,000 | (348,000) | (421,000) | (1,639,000) | 338,000 |  |  |  | (1,614,000) | 338,000 |
Net income (loss) attributable to Comfort Systems USA, Inc. | 4,351,000 | 5,673,000 | 4,468,000 | (1,029,000) | 1,747,000 | (36,569,000) | 3,162,000 | (5,170,000) | 13,463,000 | (36,830,000) | 14,740,000
Basic- |  |  |  |  |  |  |  |  |  |  |
Income (loss) from continuing operations (in dollars per share) | $ 0.10 | $ 0.15 | $ 0.12 | $ (0.02) | $ 0.12 | $ (0.98) | $ 0.11 | $ (0.13) | $ 0.35 | $ (0.88) | $ 0.54
Income (loss) from discontinued operations (in dollars per share) | $ 0.02 |  |  | $ (0.01) | $ (0.07) |  | $ (0.03) | $ (0.01) | $ 0.01 | $ (0.11) | $ (0.17)
Net income (loss) (in dollars per share) | $ 0.12 | $ 0.15 | $ 0.12 | $ (0.03) | $ 0.05 | $ (0.98) | $ 0.08 | $ (0.14) | $ 0.36 | $ (0.99) | $ 0.39
Diluted- |  |  |  |  |  |  |  |  |  |  |
Income (loss) from continuing operations (in dollars per share) | $ 0.10 | $ 0.15 | $ 0.12 | $ (0.02) | $ 0.12 | $ (0.98) | $ 0.11 | $ (0.13) | $ 0.35 | $ (0.88) | $ 0.54
Income (loss) from discontinued operations (in dollars per share) | $ 0.02 |  |  | $ (0.01) | $ (0.07) |  | $ (0.03) | $ (0.01) | $ 0.01 | $ (0.11) | $ (0.17)
Net income (loss) (in dollars per share) | $ 0.12 | $ 0.15 | $ 0.12 | $ (0.03) | $ 0.05 | $ (0.98) | $ 0.08 | $ (0.14) | $ 0.36 | $ (0.99) | $ 0.39
Net cash provided by (used in) operating activities | 27,078,000 | 16,455,000 | 6,793,000 | (19,816,000) | 51,645,000 | 1,478,000 | (4,377,000) | (19,066,000) | 30,510,000 | 29,680,000 | 32,149,000
Goodwill and other intangible asset impairment charges |  |  |  |  | $ 2,200,000 | $ 55,100,000 |  |  |  |  |

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