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v3.3.1.900

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Income Statement [Abstract] |  |  |
Revenues | $ 7,572,436 | $ 7,747,229 | $ 6,411,577
Cost of services (including depreciation) | 6,648,771 | 6,578,435 | 5,424,644
Gross profit | 923,665 | 1,168,794 | 986,933
Selling, general and administrative expenses | 592,863 | 705,477 | 485,069
Amortization of intangible assets | 34,848 | 34,257 | 25,865
Asset impairment charges | 58,451 |  |
Operating income | 237,503 | 429,060 | 475,999
Interest expense | (8,024) | (4,765) | (2,668)
Interest income | 1,493 | 3,736 | 3,378
Equity in earnings (losses) of unconsolidated affiliates, including gain on sale of investment | (466) | (332) | 112,744
Other income (expense), net | (1,831) | (1,100) | (1,133)
Income from continuing operations before income taxes | 228,675 | 426,599 | 588,320
Provision for income taxes | 97,472 | 139,007 | 196,875
Net income from continuing operations | 131,203 | 287,592 | 391,445
Net income from discontinued operations | 190,621 | 27,490 | 29,864
Net income | 321,824 | 315,082 | 421,309
Less: Net income attributable to non-controlling interests | 10,917 | 18,368 | 19,388
Net income attributable to common stock | 310,907 | 296,714 | 401,921
Amounts attributable to common stock: |  |  |
Net income from continuing operations | 120,286 | 269,224 | 372,057
Net income from discontinued operations | 190,621 | 27,490 | 29,864
Net income attributable to common stock | $ 310,907 | $ 296,714 | $ 401,921
Earnings per share attributable to common stock- basic and diluted: |  |  |
Continuing operations | $ 0.62 | $ 1.22 | $ 1.73
Discontinued operations | 0.97 | 0.13 | 0.14
Net income attributable to common stock | $ 1.59 | $ 1.35 | $ 1.87
Shares used in computing earnings per share: |  |  |
Weighted average basic shares outstanding | 195,113 | 219,668 | 214,929
Weighted average diluted shares outstanding | 195,120 | 219,690 | 214,978

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