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Share-Based Compensation (Tables)
 3 Months Ended
Mar. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Option Grant Fair Value Assumptions

The fair value of option grants is 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:

 

     Three Months Ended
March 31,		  
     2019     2018  

Expected volatility

      41.14 %      41.63 % 

Expected dividends

      0.00 %      0.00 % 

Expected term (in years)

      5.99       5.99  

Risk-free rate

      2.55 %      2.66 % 
Summary of Company's Stock Option Plan Activity

The following table summarizes the stock option activity for the three months ended March 31, 2019:

 

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, 2019

      981      $ 18.69        

Granted

      100        27.89        

Exercised

      —          —          

Forfeited

      —          —          

Expired

      —          —          
  

 

 

     

 

 

        

Options outstanding at March 31, 2019

      1,081      $ 19.55        6.7      $ 6,294  
  

 

 

     

 

 

     

 

 

     

 

 

  

Options exercisable at March 31, 2019

      871      $ 17.83        6.1      $ 6,140  
  

 

 

     

 

 

     

 

 

     

 

 

  
Summary of Additional Stock Option Information

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

 

     Three Months Ended
March 31,		  
In thousands, except per share amounts    2019      2018  

Weighted-average grant date fair value per share

    $ 12.07      $ 12.39  

Intrinsic value of options exercised

    $ —        $ 1,030  

Fair value of stock options that vested

    $ —        $ 199  

 
Summary of RSU Activity

The following table summarizes RSU activity during the three months ended March 31, 2019:

 

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

Non-vested units at January 1, 2019

      182      $ 21.89  

Granted (target)

      39        27.89  

Achieved performance adjustment (1)

      8        16.98  

Vested

      (54 )       16.98  

Forfeited

      —          —    
  

 

 

     

 

 

  

Non-vested units at March 31, 2019

      175      $ 24.55  
  

 

 

     

 

 

  

 

  (1)

The 2016 LTIP RSUs were earned and vested at 116.5% of target, as described in greater detail in the Company’s definitive proxy statement filed with the SEC on March 27, 2019.
Summary of Additional RSU Information

The following table provides additional RSU information for the periods indicated:

 

In thousands, except per unit amounts    Three Months Ended
March 31,		  
   2019      2018  

Weighted-average grant date fair value per unit

    $ 27.89      $ 28.25  

Fair value of RSUs that vested

    $ 916      $ —    

Summary of RSA Activity

The following table summarizes RSA activity during the three months ended March 31, 2019:

 

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

Non-vested shares at January 1, 2019

      71      $ 26.95  

Granted

      107        27.58  

Vested

      (4 )       24.19  

Forfeited

      —          —    
  

 

 

     

 

 

  

Non-vested shares at March 31, 2019

      174      $ 27.41  
  

 

 

     

 

 

  
Summary of Additional RSA Information

The following table provides additional RSA information for the periods indicated:

 

     Three Months Ended
March 31,		  
In thousands, except per share amounts    2019      2018  

Weighted-average grant date fair value per share

    $ 27.58    $ 20.56

Fair value of RSAs that vested

    $ 108      $ 60