Annual report pursuant to Section 13 and 15(d)

Quarterly Financial Data (Unaudited) (Tables)

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Quarterly Financial Data (Unaudited) (Tables)
12 Months Ended
Dec. 31, 2011
Quarterly Financial Information [Abstract]  
Unaudited consolidated operating results by quarter
                                 
    For the Three Months Ended  
    March 31,     June 30,     September 30,     December 31,  

2011:

                               

Revenues

  $ 848,959     $ 1,010,914     $ 1,250,819     $ 1,513,137  

Gross profit

    70,891       154,090       194,690       200,928  

Net income (loss)

    (16,305     34,313       55,600       70,808  

Net income (loss) attributable to common stock

    (17,594     31,801       51,994       66,314  

Basic earnings (loss) per share attributable to common stock

  $ (0.08   $ 0.15     $ 0.25     $ 0.32  

Diluted earnings (loss) per share attributable to common stock

  $ (0.08   $ 0.15     $ 0.25     $ 0.32  

2010:

                               

Revenues

  $ 748,283     $ 870,502     $ 1,206,007     $ 1,106,426  

Gross profit

    129,142       156,037       189,994       159,250  

Net income

    24,100       33,323       63,700       34,434  

Net income attributable to common stock

    23,744       32,986       62,780       33,666  

Basic earnings per share attributable to common stock

  $ 0.11     $ 0.16     $ 0.30     $ 0.16  

Diluted earnings per share attributable to common stock

  $ 0.11     $ 0.16     $ 0.30     $ 0.16