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CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Income Statement [Abstract] |  |
Professional service revenues | $ 129 | $ 120
Insurance service revenues | 732 | 688
Total revenues | 861 | 808
Costs and operating expenses: |  |
Insurance costs | 641 | 609
Cost of providing services (exclusive of depreciation and amortization of intangible assets) | 57 | 57
Sales and marketing | 39 | 49
General and administrative | 31 | 25
Systems development and programming costs | 13 | 11
Depreciation | 8 | 6
Amortization of intangible assets | 1 | 1
Total costs and operating expenses | 790 | 758
Operating income | 71 | 50
Other income (expense): |  |
Interest expense, bank fees and other, net | (4) | (5)
Income before provision for income taxes | 67 | 45
Income tax expense | 13 | 16
Net income | 54 | 29
Comprehensive income | $ 54 | $ 29
Net income per share: |  |
Basic (in dollars per share) | $ 0.77 | $ 0.42
Diluted (in dollars per share) | $ 0.75 | $ 0.41
Weighted average shares: |  |
Basic (in shares) | 70,047,752 | 68,509,328
Diluted (in shares) | 72,274,821 | 70,913,970

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