Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Share-based compensation (Narrative) (Details)

v3.19.3.a.u2
Share-based compensation (Narrative) (Details)
$ in Thousands
1 Months Ended 12 Months Ended
Dec. 31, 2015
Dec. 31, 2019
USD ($)
shares
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
May 14, 2014
shares
Mar. 31, 2012
shares
Share-Based Compensation [Line Items]            
Share based compensation expense | $   $ 69,410 $ 95,176 $ 107,719    
Equity Incentive Plan 2012            
Share-Based Compensation [Line Items]            
Equity awards available for grants (in shares)           8,064,081
Equity Incentive Plan 2014            
Share-Based Compensation [Line Items]            
Equity awards available for grants (in shares)         4,500,000  
NV Equity Plan            
Share-Based Compensation [Line Items]            
Restricted stock units convertible to common shares, conversion ratio 1          
NV Equity Plan | Minimum            
Share-Based Compensation [Line Items]            
Equity award vesting period   3 years        
NV Equity Plan | Maximum            
Share-Based Compensation [Line Items]            
Equity award vesting period   5 years        
Restricted Stock Units | NV Equity Plan            
Share-Based Compensation [Line Items]            
Restricted stock units converted to restricted stock (in shares)   435,000        
Restricted Stock | NV Equity Plan            
Share-Based Compensation [Line Items]            
Restricted stock units converted to restricted stock (in shares)   435,000        
Shares withheld to pay taxes (in shares)   208,704        
Shares withheld to pay taxes, treated as converted (in shares)   57,786        
Share based compensation expense | $   $ 4,700        
Converted Restricted Stock | NV Equity Plan            
Share-Based Compensation [Line Items]            
Shares withheld to pay taxes (in shares)   162,806        
Share based compensation expense | $   $ 3,000