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Share-Based Compensation (Tables)
 3 Months Ended
Sep. 30, 2013
Share-Based Compensation [Abstract]  
Summary of changes in options outstanding
During the three months ended September 30, 2013, share-based compensation awards consisted of the issuance of 241,711 nonqualified stock options and 6,615 restricted stock grants. A summary of the changes in options outstanding under the Stock Plan during the three months ended September 30, 2013 is presented below:


                     
Weighted-
     
                     
Average
     
                 
Weighted-
 
Remaining
   
Aggregate
           
Number of
   
Average
 
Contractual
   
Intrinsic
           
Options
   
Exercise Price
 
Term in Years
   
Value
Outstanding as of June 30, 2013
 
3,795,252  
 
$
8.74  
 
1.79  
 
$
17,452  
Granted
   
241,711  
   
12.42  
         
Exercised
   
(3,334)
   
8.40  
         
Forfeited and expired
 
—  
   
—  
         
Outstanding as of September 30, 2013
 
4,033,629  
 
$
8.96  
 
1.74  
 
$
30,244  
                             
Exercisable as of September 30, 2013
 
3,271,407  
 
$
7.21  
 
1.30  
 
$
29,478  
Assumptions used to estimate fair value of stock option awards using the Black-Scholes model
The Company estimates the fair value of grants using the Black-Scholes option pricing model. The following assumptions were used to estimate the fair value of stock option awards for the three months ended and as of September 30, 2013:


               
2013
Risk-free interest rate
 
0.04 to 1.39%
Expected dividend yield
 
1.62 to 2.21%
Expected volatility
 
26.05 to 59.09%
Expected term (years)
 
0.58 to 5.05