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Selected Unaudited Quarterly Information - Schedule of Quarterly Financial Information (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Selected Quarterly Financial Information [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenues (in US dollars) | $ 1,949,964 | $ 1,923,174 | $ 1,933,416 | $ 1,744,970 | $ 1,777,826 | $ 1,699,128 | $ 1,652,585 | $ 1,589,187 | $ 7,551,524 | $ 6,718,726 | $ 6,424,965
Gross profit (in US dollars) | 271,969 | 268,044 | 274,741 | 223,108 | 252,621 | 235,402 | 239,527 | 216,929 | 1,037,862 | 944,479 | 907,246
Impairment loss on identifiable intangible assets | 2,428 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2,428 | 0 | 1,471
Net income attributable to EMCOR Group, Inc. (in US dollars) | $ 40,676 | $ 51,531 | $ 55,380 | $ 34,348 | $ 51,066 | $ 41,522 | $ 46,849 | $ 32,849 | $ 181,935 | $ 172,286 | $ 168,664
Basic earnings (loss) per common share: |  |  |  |  |  |  |  |  |  |  |
Basic EPS from continuing operations (in US dollars per share) | $ 0.70 | $ 0.85 | $ 0.93 | $ 0.57 | $ 0.81 | $ 0.66 | $ 0.75 | $ 0.53 | $ 3.05 | $ 2.74 | $ 2.61
Basic EPS from discontinued operation (in US dollars per share) | (0.03) | (0.01) | (0.02) | 0.00 | 0.01 | 0.00 | 0.00 | (0.01) | (0.05) | 0.00 | (0.07)
Net income attributable to EMCOR Group, Inc. common stockholders (in US dollars per share) | 0.67 | 0.84 | 0.91 | 0.57 | 0.82 | 0.66 | 0.75 | 0.52 | 3.00 | 2.74 | 2.54
Diluted earnings (loss) per common share: |  |  |  |  |  |  |  |  |  |  |
Diluted EPS from continuing operations (in US dollars per share) | 0.69 | 0.85 | 0.92 | 0.56 | 0.80 | 0.66 | 0.74 | 0.52 | 3.02 | 2.72 | 2.59
Diluted EPS from discontinued operation (in US dollars per share) | (0.03) | (0.01) | (0.02) | 0.00 | 0.01 | 0.00 | 0.00 | 0.00 | (0.05) | 0.00 | (0.07)
Net income attributable to EMCOR Group, Inc. common stockholders (in US dollars per share) | $ 0.66 | $ 0.84 | $ 0.90 | $ 0.56 | $ 0.81 | $ 0.66 | $ 0.74 | $ 0.52 | $ 2.97 | $ 2.72 | $ 2.52

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