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Share-Based Compensation (Tables)
12 Months Ended
Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Fair Value of Option Grants

The fair value of option grants are estimated on the grant date using the Black-Scholes option-pricing model with the following weighted-average assumptions for option grants during the periods indicated below.

 

     Year Ended December 31,  
     2016     2015     2014  

Expected volatility

     46.04     47.15     42.68

Expected dividends

     0.00     0.00     0.00

Expected term (in years)

     5.80        6.15        6.21   

Risk-free rate

     1.32     1.62     1.94
Summary of Company's Stock Option Plan Activity

The following table summarizes the stock option activity for the year ended December 31, 2016:

 

In thousands, except per share amounts   Number of
Shares
    Weighted-Average
Exercise Price
Per Share
    Weighted-Average
Remaining
Contractual

Life (Years)
    Aggregate
Intrinsic
Value
 

Options outstanding at January 1, 2016

    1,044      $ 13.36       

Granted

    329        17.49       

Exercised

    (203     12.52       

Forfeited

    (4     15.66       

Expired

    —          —         
 

 

 

   

 

 

     

Options outstanding at December 31, 2016

    1,166      $ 14.66        6.3      $ 13,754   
 

 

 

   

 

 

   

 

 

   

 

 

 

Options exercisable at December 31, 2016

    683      $ 13.09        4.9      $ 9,127   
 

 

 

   

 

 

   

 

 

   

 

 

 

Available for grant at December 31, 2016

    161         
 

 

 

       
Summary of Additional Stock Option Information

The following table provides additional stock option information for the periods indicated:

 

     Year Ended December 31,  
In thousands, except per share amounts    2016      2015      2014  

Weighted-average grant date fair value per share

   $ 7.74       $ 7.13       $ 7.83   

Intrinsic value of options exercised

   $ 1,397       $ 1,524       $ 584   

Fair value of stock options that vested

   $ 2,131       $ 1,207       $ 1,484   
Summary of Restricted Stock Unit Activity

The following table summarizes restricted stock unit activity during the year ended December 31, 2016:

 

In thousands, except per unit amounts    Units      Weighted-Average
Grant Date
Fair Value Per Unit
 

Non-vested units, beginning of the year

     124       $ 15.55   

Granted

     73         17.02   

Vested

     —           —     

Forfeited

     (33      16.22   
  

 

 

    

 

 

 

Non-vested units, at December 31, 2016

     164       $ 16.07   
  

 

 

    

 

 

 
Summary of Additional Restricted Stock Unit Information

The following table provides additional restricted stock unit information for the periods indicated:

 

     Year Ended December 31,  
     2016      2015      2014  

Weighted-average grant date fair value per unit

   $ 17.02       $ 14.89       $ 17.76   
Summary of Cash-Settled Performance Units Activity

The following table summarizes cash-settled performance unit activity during the year ended December 31, 2016:

 

In thousands, except per unit amounts    Units      Weighted-Average
Grant Date
Fair Value Per Unit
 

Non-vested units, beginning of the year

     1,923       $ 1.00   

Granted

     1,252         1.00   

Vested

     —           —     

Forfeited

     (534      1.00   
  

 

 

    

 

 

 

Non-vested units, at December 31, 2016

     2,641       $ 1.00   
  

 

 

    

 

 

 
Summary of Restricted Stock Activity

The following table summarizes restricted stock activity during the year ended December 31, 2016:

 

In thousands, except per share amounts    Shares      Weighted-Average
Grant Date
Fair Value Per Share
 

Non-vested shares, beginning of the year

     23       $ 16.74   

Granted

     37         16.37   

Vested

     (21      16.62   

Forfeited

     —           —     
  

 

 

    

 

 

 

Non-vested shares, at December 31, 2016

     39       $ 16.46   
  

 

 

    

 

 

 
Summary of Additional Restricted Stock Information

The following table provides additional restricted stock information.

 

     Year Ended December 31,  
In thousands, except per share amounts    2016      2015      2014  

Weighted-average grant date fair value per share

   $ 16.37       $ 15.36       $ 16.23   

Fair value of restricted stock awards that vested

   $ 347       $ 2,198       $ 224