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Consolidated Statements of Operations and Comprehensive Income - USD ($)
shares in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Net Revenues:      
Products $ 1,723,433 $ 1,134,013 $ 697,104
Services 192,544 161,329 116,420
Total net revenues 1,915,977 1,295,342 813,524
Cost of revenues:      
Cost of products 901,546 627,850 373,764
Cost of service 122,980 101,873 76,888
Total cost of revenues (exclusive of amortization shown separately below) 1,024,526 729,723 450,652
Gross profit 891,451 565,619 362,872
Research and development 132,555 110,579 68,305
Selling, general and administrative 290,548 229,171 129,087
Acquisition and integration costs 5,332 27,279 30
Restructuring 3,920 642 2,074
Asset impairment 6,719 5,000  
Amortization of intangible assets 45,743 35,681 6,764
Income from operations 406,634 157,267 156,612
Interest income 3,021 2,560 2,999
Interest expense 30,990 30,611 143
Gain on sale of business 74,856    
Other expense, net 5,896 1,239  
Income before income taxes 447,625 127,977 159,468
Provision for income taxes 108,493 23,168 37,171
Net income 339,132 104,809 122,297
Other comprehensive income:      
Changes in value of financial instruments designated as cash flow hedges, net of tax (benefit) expense(1) [1] (4,568) 3,380 (469)
Foreign currency translation adjustments, net of tax of $0 for 2017, 2016 and 2015 37,172 (22,713) (8,301)
Unrecognized pension gain (loss), net of tax benefit(2) [2] 323 (266)  
Unrealized gain (loss) on investments, net of tax (benefit) expense(3) [3] 1,072 223 (317)
Total comprehensive income $ 373,131 $ 85,433 $ 113,210
Net income per share:      
Basic $ 6.26 $ 1.96 $ 2.30
Diluted 6.16 1.94 2.28
Cash dividends paid per common share $ 0.71 $ 0.68 $ 0.68
Weighted average common shares outstanding:      
Basic 54,137 53,472 53,282
Diluted 55,074 54,051 53,560
[1] Tax (benefit) expense was $(1,468), $2,535 and $(85) for the years ended December 31, 2017, 2016 and 2015, respectively.
[2] Tax benefit was $(88) and $(199) for the years ended December 31, 2017 and 2016, respectively, and $0 for 2015.
[3] Tax (benefit) expense was $(769), $167, and $(58) for the years ended December 31, 2017, 2016 and 2015, respectively.