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Share-based Compensation (Tables)
 3 Months Ended
Sep. 30, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Assumptions for Fair Value Measurement of Stock Options
For the three months ended September 30, 2012, the fair value of stock option awards was estimated using the Black-Scholes option-pricing model with the following assumptions and weighted-average fair values:
 
Three Months Ended
September 30,
 
2013
 
2012
Risk-free interest rate
N/A
 
0.82% and 0.88%

Dividend yield
N/A
 
—
%
Expected life in years
N/A
 
4.0 - 6.0

Expected volatility
N/A
 
126
%