Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Summary of Nonvested Restricted Stock Award Activity) (Details)

v3.8.0.1
Stockholders' Equity (Summary of Nonvested Restricted Stock Award Activity) (Details) - Stock Option Plan - Restricted Stock - $ / shares
shares in Thousands
9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Shares    
Nonvested beginning balance (shares) 1,465  
Granted (shares) 597  
Vested (shares) (388)  
Forfeited (shares) (3)  
Nonvested ending balance (shares) 1,671  
Weighted Average Grant Date Fair Value    
Nonvested beginning balance (USD per share) $ 14.41  
Granted (USD per share) 22.94 $ 17.68
Vested (USD per share) 17.48  
Forfeited (USD per share) 17.84  
Nonvested ending balance (USD per share) $ 16.74