Annual report pursuant to Section 13 and 15(d)

Share-Based Awards and Cash-Based Awards - Schedule of Restricted Stock Awards Outstanding (Details)

v3.10.0.1
Share-Based Awards and Cash-Based Awards - Schedule of Restricted Stock Awards Outstanding (Details) - Restricted Shares - shares
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Awards expected to vest by period 181,832 246,528 161,296 78,230
2019        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Awards expected to vest by period 105,012      
2020        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Awards expected to vest by period 62,972      
2021        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Awards expected to vest by period 13,848