XML 61 R49.htm IDEA: XBRL DOCUMENT v3.10.0.1
Equity (Performance Stock Narrative) (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Intrinsic value vested $ 0.2 $ 1.4  
Performance Stock Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unamortized stock-based compensation expense $ 1.2    
Weighted average remaining service period (in years) 1 year 8 months 19 days    
Unvested stock units (in shares) 234,324   397,777
Intrinsic value of non-vested and expected to vest PSUs $ 1.0    
Average remaining contractual term (in years) 1 year 8 months 19 days    
Weighted average fair value (in usd per share) $ 0.00   $ 7.62
Granted (in shares) 0    
Amount considered issued and outstanding (as percentage of target number of shares) 200.00%    
Vested (in shares) 30,874    
Performance Stock Awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unamortized stock-based compensation expense $ 0.2    
Weighted average remaining service period (in years) 9 months 15 days    
Unvested stock units (in shares) 33,333   33,333
Weighted average fair value (in usd per share) $ 0.00    
Granted (in shares) 0    
Vested (in shares) 0