Annual report pursuant to Section 13 and 15(d)

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

v3.6.0.2
Stockholders' Equity (Summary of Nonvested Restricted Stock Award Activity) (Details) - Stock Option Plan [Member] - Restricted Stock - $ / shares
shares in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Shares      
Nonvested, Beginning 1,495    
Granted 790    
Vested (817)    
Forfeited (3)    
Nonvested, Ending 1,465 1,495  
Weighted Average Grant Date Fair Value      
Nonvested, Beginning (USD per share) $ 11.08    
Granted (USD per share) 17.87 $ 15.06 $ 10.04
Vested (USD per share) 11.65    
Forfeited (USD per share) 16.09    
Nonvested, Ending (USD per share) $ 14.41 $ 11.08