Share-Based Compensation - Schedule of Fair Value of Each Option Award Estimated on Date of Grant Using Black-Scholes Option Valuation Model (Detail) (USD $)	6 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility minimum	32.70%	43.00%
Expected volatility maximum	55.40%	59.30%
Weighted-average volatility	45.90%	50.10%
Expected annual dividend	$ 1.20	$ 0.60
Risk-free rate minimum	0.30%	0.20%
Risk-free rate maximum	1.80%	0.60%
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (in years)	2 years 4 months 28 days	2 years 3 months 26 days
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (in years)	4 years 7 months 28 days	4 years 5 months 19 days