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v3.7.0.1

Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Income Statement [Abstract] |  |  |  |
Revenues | $ 2,200,374 | $ 1,792,430 | $ 4,378,544 | $ 3,506,167
Cost of services (including depreciation) | 1,898,209 | 1,592,213 | 3,810,191 | 3,102,637
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
Operating income | 109,791 | 35,469 | 184,865 | 72,763
Interest expense | (4,271) | (3,583) | (8,236) | (7,172)
Interest income | 164 | 641 | 451 | 1,157
Other income (expense), net | (1,079) | (1,103) | (1,443) | (1,022)
Income before income taxes | 104,605 | 31,424 | 175,637 | 65,726
Provision for income taxes | 40,245 | 14,695 | 62,837 | 28,138
Net income | 64,360 | 16,729 | 112,800 | 37,588
Less: Net income attributable to non-controlling interests | 523 | 167 | 696 | 530
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
Shares used in computing earnings per share attributable to common stock: |  |  |  |
Weighted average basic shares outstanding (in shares) | 155,090 | 156,128 | 154,859 | 159,577
Weighted average diluted shares outstanding (in shares) | 156,165 | 156,130 | 155,745 | 159,579

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