XML 57 R40.htm IDEA: XBRL DOCUMENT v3.10.0.1
Stock-Based Compensation - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Grants in period (in shares)     223,570    
Share-based compensation expense $ 2,700 $ 200 $ 6,600 $ 6,600  
Accrued employee compensation and benefits 12,136   12,136   $ 13,547
Restricted Stock Units (RSUs)          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Total compensation cost not yet recognized $ 22,600   $ 22,600    
Total compensation cost not yet recognized, period for recognition (in years)     1 year 11 months 1 day    
Restricted stock, granted (in shares)     52,711    
Vested in period (in shares)     15,737    
Restricted stock, forfeited (in shares)     71    
Cash-settled restricted stock units, outstanding (in shares) 340,251   340,251   303,348
Stock Options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Total compensation cost not yet recognized $ 4,700   $ 4,700    
Total compensation cost not yet recognized, period for recognition (in years)     1 year 10 months 2 days    
Performance Shares          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Grants in period (in shares) 25,330        
Performance Based Restricted Stock Units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Restricted stock, granted (in shares) 26,670        
Cash-settled Restricted Stock Units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares issued in period (in shares)     58,747    
Vested in period (in shares)     59    
Restricted stock, forfeited (in shares)     1,746    
Cash-settled restricted stock units, outstanding (in shares) 56,942   56,942    
Share-based compensation expense $ 200   $ 300    
LTIP          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting period (in years)     3 years    
Share-based compensation expense 200 $ (1,300) $ 600 $ (1,100)  
Accrued employee compensation and benefits $ 700   $ 700   $ 200
LTIP | Minimum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Multiplier for target award based on total shareholder return on common stock (percent)     0.00%    
LTIP | Maximum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Multiplier for target award based on total shareholder return on common stock (percent)     200.00%