Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Statements of Operations

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Condensed Consolidated Statements of Operations - USD ($)
shares in Thousands, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Income Statement [Abstract]        
Revenues $ 2,656,348 $ 2,200,374 $ 5,073,924 $ 4,378,544
Cost of services (including depreciation) 2,322,977 1,898,209 4,439,505 3,810,191
Gross profit 333,371 302,165 634,419 568,353
Selling, general and administrative expenses 206,104 185,880 421,526 370,432
Amortization of intangible assets 10,507 6,494 20,912 13,056
Change in fair value of contingent consideration liabilities (6,279) 0 (6,279) 0
Operating income 123,039 109,791 198,260 184,865
Interest expense (9,178) (4,271) (15,956) (8,236)
Interest income 660 164 806 451
Other income (expense), net (10,426) (1,079) (22,401) (1,443)
Income before income taxes 104,095 104,605 160,709 175,637
Provision for income taxes 29,389 40,245 47,392 62,837
Net income 74,706 64,360 113,317 112,800
Less: Net income attributable to non-controlling interests 341 523 1,338 696
Net income attributable to common stock $ 74,365 $ 63,837 $ 111,979 $ 112,104
Earnings per share attributable to common stock, basic (in usd per share) $ 0.49 $ 0.41 $ 0.72 $ 0.72
Earnings per share attributable to common stock, diluted (in usd per share) $ 0.48 $ 0.41 $ 0.72 $ 0.72
Weighted average basic shares outstanding (in shares) 153,325 155,090 154,906 154,859
Weighted average diluted shares outstanding (in shares) 154,595 156,165 156,112 155,745