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Unaudited Quarterly Financial Data (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Unaudited Quarterly Financial Data |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 1,099,291 | $ 1,030,388 | $ 1,053,065 | $ 992,928 | $ 1,114,198 | $ 1,099,393 | $ 985,346 | $ 912,534 | $ 4,175,672 | $ 4,111,471 | $ 3,716,317
Gross profit | 139,735 | 120,857 | 105,955 | 100,357 | 126,449 | 115,463 | 87,061 | 86,159 | 466,904 | 415,132 | 395,341
Income (loss) from construction operations | 70,175 | 58,094 | 39,474 | 36,079 | 60,724 | 54,676 | (354,174) | 16,963 | 203,822 | (221,811) | 168,376
Income (loss) before income taxes | 53,507 | 37,035 | 25,157 | 23,916 | 48,098 | 44,182 | (363,695) | 3,573 | 139,615 | (267,842) | 137,047
Net (loss) income | 33,259 | 23,759 | 15,478 | 14,800 | 41,635 | 42,591 | (348,423) | (1,203) | 87,296 | (265,400) | 86,148
Goodwill and intangible asset impairment |  |  |  |  |  |  | $ 376,600 |  |  | $ 376,574 |
(Loss) earnings per share: |  |  |  |  |  |  |  |  |  |  |
Basic (in dollars per share) | $ 0.69 | $ 0.50 | $ 0.32 | $ 0.31 | $ 0.88 | $ 0.90 | $ (7.35) | $ (0.03) | $ 1.82 | $ (5.59) | $ 1.82
Diluted (in dollars per share) | $ 0.68 | $ 0.49 | $ 0.32 | $ 0.31 | $ 0.86 | $ 0.88 | $ (7.35) | $ (0.03) | $ 1.80 | $ (5.59) | $ 1.80

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