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Consolidated Statements of Income - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2014
Income Statement [Abstract] |  |  |
Revenue | $ 3,718,229 | $ 3,643,538 | $ 3,563,637
Operating expenses: |  |  |
Cost of revenue | 2,408,040 | 2,349,488 | 2,306,892
Research and development | 252,292 | 254,944 | 257,896
Selling, general and administrative | 464,883 | 440,085 | 445,134
Amortization of purchased intangible assets and other | 109,873 | 70,073 | 58,067
Restructuring charges |  | 13,000 |
Total operating expenses | 3,235,088 | 3,127,590 | 3,067,989
Operating income | 483,141 | 515,948 | 495,648
Interest and other income (expense), net | 1,557 | (2,544) | (6,098)
Income before income taxes | 484,698 | 513,404 | 489,550
Income taxes | 75,367 | 67,241 | 67,428
Net income | $ 409,331 | $ 446,163 | $ 422,122
Basic earnings per share | $ 2.74 | $ 2.89 | $ 2.65
Diluted earnings per share | $ 2.71 | $ 2.85 | $ 2.62

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