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Share-Based Compensation - Weighted-average assumptions using Black-Scholes model (Details) (USD $)
12 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2011
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]      
Average fair value of options $ 5.69 $ 4.42 $ 7.05
Forfeiture rate 6.50% 6.50% 6.50%
Risk-free interest rate 0.90% 1.10% 2.70%
Dividend yield 0.00% 0.00% 1.30%
Average expected life 6 years 6 years 6 years
Expected stock price volatility 49.50% 52.50% 54.70%