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Summary of Significant Accounting Policies - Topic 606 (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Mar. 31, 2018
Apr. 01, 2017
Dec. 30, 2017
Balance Sheet Related Disclosures [Abstract]      
Accounts receivable $ (101,093)   $ (118,532)
Inventories (91,062)   (92,259)
Other current assets 34,663   33,601
Deferred costs and other contract assets 114,958   109,256
Deferred tax assets     (19,981)
Other non-current assets (4,093)   (4,668)
Accrued and other liabilities (30,824)   (24,254)
Deferred revenue and other contract-related liabilities, current (34,509)   (32,105)
Retained earnings 783,159   737,955
Income Statement [Abstract]      
Total product revenue 204,389 $ 182,466  
Royalty and other revenue 8,564 14,177  
Cost of goods sold 69,292 64,229  
Selling, general and administrative 71,175 66,087  
Provision for income taxes 9,902 1,492  
Net income $ 45,630 $ 51,533  
Net income per basic share $ 0.88 $ 1.02  
Net income per diluted share $ 0.82 $ 0.93  
Statement of Cash Flows [Abstract]      
Decrease in inventories $ 1,139 $ (7,381)  
Increase (decrease) in other current assets (204) (3,125)  
Decrease in deferred costs and other contract assets (5,706) (7,643)  
Increase (decrease) in other non-current assets 644 878  
Increase (decrease) in accrued liabilities 2,193 (94)  
Decrease in income taxes payable 6,318 (4,845)  
Increase (decrease) in deferred revenue and other contract-related liabilities $ 2,381 (4,043)  
Increase in other non-current liabilities   1,094  
As Previously Reported      
Balance Sheet Related Disclosures [Abstract]      
Accounts receivable     (121,309)
Inventories     (95,944)
Other current assets     31,563
Deferred costs and other contract assets     99,600
Deferred tax assets     (23,898)
Other non-current assets     (10,782)
Accrued and other liabilities     (42,344)
Deferred revenue and other contract-related liabilities, current     (35,929)
Retained earnings     720,842
Income Statement [Abstract]      
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  
Net income per basic share   $ 0.90  
Net income per diluted share   $ 0.82  
Statement of Cash Flows [Abstract]      
Decrease in inventories   $ (7,655)  
Increase (decrease) in other current assets   (3,106)  
Decrease in deferred costs and other contract assets   (8,158)  
Increase (decrease) in other non-current assets   (188)  
Increase (decrease) in accrued liabilities   (1,960)  
Decrease in income taxes payable   0  
Increase (decrease) in deferred revenue and other contract-related liabilities   2,563  
Increase in other non-current liabilities   1,094  
Adjustments      
Balance Sheet Related Disclosures [Abstract]      
Accounts receivable     (2,777)
Inventories     (3,685)
Other current assets     2,038
Deferred costs and other contract assets     9,656
Deferred tax assets     (3,917)
Other non-current assets     (6,114)
Accrued and other liabilities     (18,090)
Deferred revenue and other contract-related liabilities, current     (3,824)
Retained earnings     $ 17,113
Income Statement [Abstract]      
Total product revenue   4,369  
Royalty and other revenue   5,972  
Cost of goods sold   2,061  
Selling, general and administrative   515  
Provision for income taxes   2,757  
Net income   $ 6,199  
Net income per basic share   $ 0  
Net income per diluted share   $ 0  
Statement of Cash Flows [Abstract]      
Decrease in inventories   $ 274  
Increase (decrease) in other current assets   (19)  
Decrease in deferred costs and other contract assets   515  
Increase (decrease) in other non-current assets   1,066  
Increase (decrease) in accrued liabilities   1,866  
Decrease in income taxes payable   (4,845)  
Increase (decrease) in deferred revenue and other contract-related liabilities   (6,606)  
Increase in other non-current liabilities   $ 0