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Common Stock and Stockholders' Equity - Performance Stock Units (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Other disclosures    
Stock-based compensation $ 18,315 $ 13,523
PSUs    
Shares    
Outstanding at beginning of period (in shares) 512,482  
Granted (in shares) 111,199  
Vested and issued (in shares) (186,455)  
Outstanding at end of period (in shares) 437,226  
Vested and unissued (in shares) 0  
Nonvested (in shares) 437,226  
Weighted-Average Grant Date Fair Value Per Share    
Outstanding at beginning of period (in dollars per share) $ 62.51  
Granted (in dollars per share) 117.81  
Vested and issued (in dollars per share) 62.02  
Outstanding at end of period (in dollars per share) 76.78  
Vested and unissued (in dollars per share) 0  
Non-vested (in dollars per share) $ 76.78  
Other disclosures    
Grant date fair value of PSUs granted $ 13,100 28,400
Stock-based compensation 4,600 $ 2,600
Unrecognized compensation cost related to non vested $ 25,400  
Period over which unrecognized compensation cost is expected to be recognized 1 year 9 months 18 days  
PSUs | Minimum    
Common Stock and Stockholders' Equity    
Vesting period 1 year  
Actual performance compared to performance conditions percentage 50.00%  
PSUs | Maximum    
Common Stock and Stockholders' Equity    
Vesting period 3 years  
Actual performance compared to performance conditions percentage 200.00%