XML 149 R108.htm IDEA: XBRL DOCUMENT v3.8.0.1
Share-based Compensation - Stock Option Activity Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Jun. 13, 2013
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Jun. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Weighted-average estimated fair value of stock options granted (in dollars per share)   $ 7.84 $ 12.03 $ 13.80  
Stock compensation expense not yet recognized, options   $ 8,914      
Employee Time Options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting period   1 year 4 months 24 days      
Employee Stock Time Options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock compensation expense not yet recognized, options   $ 7,149      
Performance Shares          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock compensation expense not yet recognized, options   $ 1,765      
Restricted Stock Units (RSUs)          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting period   1 year 3 months 18 days      
Stock compensation costs not yet recognized, awards other than options   $ 17,249      
Time Based Restricted Stock Units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock compensation costs not yet recognized, awards other than options   6,505      
Performance Based Restricted Stock Units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock compensation costs not yet recognized, awards other than options   9,701      
Market Based Restricted Stock Units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock compensation costs not yet recognized, awards other than options   $ 1,043      
2013 Long-Term Incentive Plan | Employee Time Options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock compensation expense not yet recognized, options         $ 5,000
2013 Long-Term Incentive Plan | Performance Shares          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award catch up period 8 years        
2013 Long-Term Incentive Plan | Restricted Stock Units (RSUs)          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award catch up period 8 years        
2013 Long-Term Incentive Plan | Minimum | Employee Time Options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting period 3 years        
2013 Long-Term Incentive Plan | Minimum | Restricted Stock Units (RSUs)          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting period 3 years        
2013 Long-Term Incentive Plan | Maximum | Employee Time Options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting period 5 years        
2013 Long-Term Incentive Plan | Maximum | Restricted Stock Units (RSUs)          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting period 5 years