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Condensed Consolidated Statement of Income Statement - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended
Mar. 31, 2018
Apr. 01, 2017
Total product revenue $ 204,389 $ 182,466
Royalty and other revenue 8,564 14,177
Total revenue 212,953 196,643
Cost of goods sold 69,292 64,229
Gross profit 143,661 132,414
Selling, general and administrative 71,175 66,087
Research and development 18,601 14,176
Total operating expenses 89,776 80,263
Operating income 53,885 52,151
Non-operating income 1,647 874
Income before provision for income taxes 55,532 53,025
Provision for income taxes 9,902 1,492
Net income including noncontrolling interest 45,630 51,533
Net income 45,630 51,533
Foreign currency translation adjustments (270) 566
Comprehensive Income (Loss), Net of Tax, Attributable to Parent $ 45,360 $ 52,099
Basic $ 0.88 $ 1.02
Diluted $ 0.82 $ 0.93
Basic 51,709 50,652
Diluted 55,496 55,529
As Previously Reported    
Total product revenue   $ 178,097
Royalty and other revenue   8,205
Cost of goods sold   62,168
Selling, general and administrative   65,572
Provision for income taxes   (1,265)
Net income   $ 45,334
Basic   $ 0.90
Diluted   $ 0.82