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Basis of Presentation - Accounting for Stock-Based Compensation (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Stock-based compensation activity, including both continuing and discontinued operations      
Stock-based compensation expense recognized in operating expenses $ 7,586 $ 2,480  
Less: Tax benefit of stock-based compensation expense in provision for income taxes 2,791 895  
Stock-based compensation expense, net of tax 4,795 1,585  
Fair value of shares vested 7,650 2,350  
Proceeds to the Company from the exercise of stock-based compensation 314 1,012  
Tax effect from the exercise of stock-based compensation, including shortfall tax benefits 1,104 24 $ 227
Fair value of financial instruments      
United States Treasury securities and money market funds $ 3,545 $ 71,442 $ 2,832
Income Taxes      
Effective tax rate (as a percent) 24.90% 38.10%  
Provision for income taxes $ 7,680 $ 10,063  
Stock Compensation Plan [Member]      
Stock-based compensation activity, including both continuing and discontinued operations      
Stock-based compensation cost capitalized in inventory $ 521 $ 253  
1994 Plan      
Stock-Based Compensation      
Requisite service period 4 years    
Expiration period 7 years    
2011 Plan      
Stock-Based Compensation      
Maximum common stock shares that may be issued under plan (in shares) 150,000    
2011 Plan | Stock Options      
Stock-Based Compensation      
Maximum common stock shares that may be issued under plan (in shares) 16,300,000    
2011 Plan | Restricted Stock Units      
Stock-Based Compensation      
Maximum common stock shares that may be issued under plan (in shares) 100,000