XML 68 R57.htm IDEA: XBRL DOCUMENT v3.19.1
Equity - Schedule of Shares Issued (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2016
Performance Shares [Member]      
Class of Stock [Line Items]      
Shares granted (in shares)     808,929
Shares vested measurement period 3 years    
Vested in period (in shares) 713,044    
Performance Shares [Member] | Index Performance Shares - 1Q [Member]      
Class of Stock [Line Items]      
Shares granted (in shares) 276,063 331,025  
Grant date fair value per share (in dollars per share) $ 5.05 $ 5.81  
Performance Shares [Member] | Peer Performance Shares - 1Q [Member]      
Class of Stock [Line Items]      
Shares granted (in shares) 276,058 331,019  
Grant date fair value per share (in dollars per share) $ 4.67 $ 5.37  
Restricted Stock [Member]      
Class of Stock [Line Items]      
Shares granted (in shares) 277,460 237,570  
Grant date fair value $ 2,270 $ 2,190  
Award requisite service period 3 years