Shareholders' Equity and Share-Based Compensation - Schedule of Fair Value of Each Option Award Estimated on Date of Grant Using Black-Scholes Option Valuation Model (Detail) (USD $)	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility minimum	32.70%	41.80%	48.80%
Expected volatility maximum	55.40%	60.30%	66.20%
Weighted-average volatility	45.80%	50.00%	59.10%
Expected annual dividend	$ 1.2	$ 0.6	$ 0.3
Risk-free rate minimum	0.30%	0.20%	0.20%
Risk-free rate maximum	1.80%	1.00%	1.00%
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (in years)	2 years 18 days	2 years 3 months 26 days	1 year 8 months 12 days
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (in years)	4 years 7 months 28 days	6 years 3 months	5 years 6 months 15 days