Quarterly report pursuant to Section 13 or 15(d)

Equity-Based Compensation - Performance Units to be Settled in Common Stock (Details)

v3.19.1
Equity-Based Compensation - Performance Units to be Settled in Common Stock (Details) - USD ($)
$ / shares in Units, $ in Thousands, shares in Millions
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Non-cash stock compensation expense $ 13,012 $ 14,687
Performance Units    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Required performance period 3 years  
Performance units granted (in shares) 0.3 0.3
Weighted average grant date fair value (in dollars per share) $ 15.49 $ 12.24
Non-cash stock compensation expense $ 1,700 $ 3,500
Performance units vested (in shares) 0.2 0.1
Number of common shares issued in connection with performance units (in shares) 0.4 0.1
Performance Units | Minimum    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Performance units performance percentage 0.00%  
Performance Units | Maximum    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Performance units performance percentage 200.00%