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Stock-Based Compensation Introduction Narrative (Details)
1 Months Ended 6 Months Ended
Aug. 31, 2016
$ / shares
May 31, 2016
shares
Jun. 30, 2017
Performance_metrics
shares
May 04, 2016
shares
Number of Additional Shares Authorized   9,800,000    
Deduction from share reserve       2.22
Number of Shares Available for Grant     3,000,000  
Common stock dividends declared, per share | $ / shares $ 0.09      
Performance Share Units        
The first performance metric | Performance_metrics     1  
Restricted Stock Units (RSUs)        
Award Vesting Period     3 years  
Annual Vesting Percentage     33.33%  
Options        
Award Vesting Period     4 years  
Annual Vesting Percentage     25.00%  
Contractual Term     10 years  
Maximum        
Number of Shares Authorized     19,400,000  
2017 | Performance Share Units        
Award Vesting Period     3 years  
Number of Performance Metrics | Performance_metrics     2  
2017 | RTSR | Minimum | Performance Share Units        
Award Vesting Rights Percentage     0.00%  
2017 | RTSR | Maximum | Performance Share Units        
Award Vesting Rights Percentage     175.00%  
2017 | Cumulative Free Cash Flow | Minimum | Performance Share Units        
Award Vesting Rights Percentage     0.00%  
2017 | Cumulative Free Cash Flow | Maximum | Performance Share Units        
Award Vesting Rights Percentage     200.00%