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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Revenue: |  |
Revenue, net (includes $1.5 million with related parties for the three months ended March 31, 2018) | $ 163,077 | $ 0
Service revenue, net (includes $4.0 million with related parties for the three months ended March 31, 2017) | 0 | 93,781
Reimbursed out-of-pocket revenue (includes $0.7 million with related parties for the three months ended March 31, 2017) | 0 | 12,830
Total revenue | 163,077 | 106,611
Operating expenses: |  |
Direct service costs, excluding depreciation and amortization | 60,341 | 51,105
Reimbursed out-of-pocket expenses | 56,913 | 12,830
Total direct costs | 117,254 | 63,935
Selling, general and administrative | 15,999 | 15,154
Depreciation | 2,314 | 2,130
Amortization | 7,391 | 9,448
Total operating expenses | 142,958 | 90,667
Income from operations | 20,119 | 15,944
Other expense, net: |  |
Miscellaneous expense, net | (153) | (372)
Interest expense, net | (2,309) | (1,794)
Total other expense, net | (2,462) | (2,166)
Income before income taxes | 17,657 | 13,778
Income tax provision | 3,106 | 5,331
Net income | $ 14,551 | $ 8,447
Net income per share attributable to common shareholders: |  |
Basic | $ 0.41 | $ 0.21
Diluted | $ 0.40 | $ 0.20
Weighted average common shares outstanding: |  |
Basic | 35,486 | 40,669
Diluted | 36,449 | 41,508

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