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Stock-Based Compensation (Details 2) - Stock Options
shares in Thousands
12 Months Ended
Dec. 31, 2015
$ / shares
shares
$6.38 - $7.94  
Stock-Based Compensation  
Exercise price, low end of range (in dollars per share) $ 7.95
Exercise price, high end of range (in dollars per share) $ 12.94
Options Outstanding  
Number of Shares | shares 202
Weighted Average Remaining Contractual Life 4 years 11 months 23 days
Weighted Average Exercise Price (in dollars per share) $ 11.56
Options Exercisable  
Number of Shares | shares 202
Weighted Average Exercise Price (in dollars per share) $ 11.56
$10.73 - $12.90  
Stock-Based Compensation  
Exercise price, low end of range (in dollars per share) 12.95
Exercise price, high end of range (in dollars per share) $ 17.94
Options Outstanding  
Number of Shares | shares 390
Weighted Average Remaining Contractual Life 6 years 7 months 10 days
Weighted Average Exercise Price (in dollars per share) $ 14.63
Options Exercisable  
Number of Shares | shares 235
Weighted Average Exercise Price (in dollars per share) $ 14.13
13.15 - 16.15  
Stock-Based Compensation  
Exercise price, low end of range (in dollars per share) 17.95
Exercise price, high end of range (in dollars per share) $ 19.67
Options Outstanding  
Number of Shares | shares 132
Weighted Average Remaining Contractual Life 9 years 2 months 27 days
Weighted Average Exercise Price (in dollars per share) $ 19.67
6.38 - 16.15  
Stock-Based Compensation  
Exercise price, low end of range (in dollars per share) 7.95
Exercise price, high end of range (in dollars per share) $ 19.67
Options Outstanding  
Number of Shares | shares 724
Weighted Average Remaining Contractual Life 6 years 7 months 17 days
Weighted Average Exercise Price (in dollars per share) $ 14.69
Options Exercisable  
Number of Shares | shares 437
Weighted Average Exercise Price (in dollars per share) $ 12.94