XML 77 R67.htm IDEA: XBRL DOCUMENT v3.19.1
Net Income per Share - Additional Information (Details) - shares
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Effect of dilutive securities - Convertible Notes (in shares) 30,093,312  
RSU [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Unvested RSUs (in shares) 1,849,564 1,659,576