Quarterly report pursuant to Section 13 or 15(d)

Acquisitions - Unaudited Supplemental Pro Forma Results of Operations (Detail)

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Acquisitions - Unaudited Supplemental Pro Forma Results of Operations (Detail) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Business Acquisition [Line Items]        
Revenues $ 2,200,374 $ 1,792,430 $ 4,378,544 $ 3,506,167
Gross profit 302,165 200,217 568,353 403,530
Selling, general and administrative expenses 185,880 156,607 370,432 315,131
Amortization of intangible assets 6,494 8,141 13,056 15,636
Net income 64,360 16,729 112,800 37,588
Net income attributable to common stock $ 63,837 $ 16,562 $ 112,104 $ 37,058
Earnings per share attributable to common stock - basic and diluted (in usd per share) $ 0.41 $ 0.11 $ 0.72 $ 0.23
Pro Forma | Acquisitions        
Business Acquisition [Line Items]        
Revenues $ 2,203,724 $ 1,806,214 $ 4,386,919 $ 3,541,361
Gross profit 303,222 203,354 570,996 410,576
Selling, general and administrative expenses 186,512 158,603 372,012 319,799
Amortization of intangible assets 6,729 8,683 13,644 16,866
Net income 64,472 17,080 113,074 38,298
Net income attributable to common stock $ 63,949 $ 16,913 $ 112,378 $ 37,768
Earnings per share attributable to common stock - basic and diluted (in usd per share) $ 0.41 $ 0.11 $ 0.72 $ 0.24