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CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (Unaudited) - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2017 | Mar. 31, 2016
Income Statement [Abstract] |  |
Revenues | $ 324,651 | $ 264,482
Operating expenses: |  |
Cost of revenues (exclusive of depreciation and amortization) | 207,730 | 167,381
Selling, general and administrative expenses | 78,453 | 61,494
Depreciation and amortization expense | 6,672 | 5,102
Other operating expenses, net | 830 | 174
Income from operations | 30,966 | 30,331
Interest and other income, net | 584 | 1,211
Foreign exchange loss | (2,955) | (1,290)
Income before provision for income taxes | 28,595 | 30,252
Provision for income taxes | 4,954 | 6,353
Net income | 23,641 | 23,899
Foreign currency translation adjustments | 6,386 | 4,699
Comprehensive income | $ 30,027 | $ 28,598
Net income per share: |  |
Basic (in dollars per share) | $ 0.46 | $ 0.48
Diluted (in dollars per share) | $ 0.44 | $ 0.45
Shares used in calculation of net income per share: |  |
Basic (in shares) | 50,958 | 49,714
Diluted (in shares) | 53,889 | 52,883

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