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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]      
Net revenues [1] $ 845,486 $ 761,653 $ 660,206
Cost of revenues 205,376 183,210 162,100
Gross profit 640,110 578,443 498,106
Operating expenses:      
Selling, general and administrative 390,239 332,068 292,798
Research and development 61,237 52,799 44,083
Impairment of goodwill 0 0 40,693
Impairment of long lived assets 0 0 26,320
Total operating expenses 451,476 384,867 403,894
Income from operations 188,634 193,576 94,212
Interest and other income (expense), net (2,533) (3,207) (1,073)
Net income before provision for income taxes 186,101 190,369 93,139
Provision for income taxes 42,081 44,537 28,844
Net income $ 144,020 $ 145,832 $ 64,295
Net income per share:      
Basic (usd per share) $ 1.80 $ 1.81 $ 0.80
Diluted (usd per share) $ 1.77 $ 1.77 $ 0.78
Shares used in computing net income per share:      
Basic (shares) 79,998 80,754 80,551
Diluted (shares) 81,521 82,283 82,589
[1] 2 Long-lived assets are attributed to countries based on entity that owns the assets.