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Stock-Based Compensation - Stock Options Activity (Details) - Stock Options - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2017
Dec. 31, 2016
Stock Options    
Options outstanding at the beginning of the period (in shares) 747  
Granted (in shares) 0  
Exercised (shares) (76)  
Canceled (in shares) (40)  
Options outstanding at the end of the period (in shares) 631 747
Options exercisable at the end of the period (in shares) 631  
Weighted Average Exercise Price Per Share    
Options outstanding at the beginning of the period (in dollars per share) $ 16.88  
Granted (in dollars per share) 0.00  
Exercised (in dollars per share) 12.34  
Canceled (in dollars per share) 14.48  
Options outstanding at end of period, (in dollars per share) 17.57 $ 16.88
Options exercisable at the end of period (in dollars per share) $ 17.57  
Weighted Average Remaining Life    
Outstanding at the end of the period 2 years
Exercisable at the end of the period 2 years  
Aggregate Intrinsic Value    
Outstanding at the end of the period (in dollars) $ 1,481
Exercisable at the end of the period (in dollars) $ 1,481