Summary of Stock Appreciation Rights Activity (Detail) (Stock Appreciation Rights (SARs) [Member], USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Jun. 30, 2013
Stock Appreciation Rights (SARs) [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Options, Outstanding at beginning of period	0
Stock Appreciation Rights Outstanding, Rights Granted	117,015
Stock Appreciation Rights Outstanding, Rights Exercised	0
Stock Appreciation Rights Outstanding, Rights Canceled	0
Options, Outstanding at end of period	117,015
Stock Appreciation Rights Outstanding, Exercisable at end of period	67,614
Weighted Average Exercise Price at beginning of period	$ 0
Weighted Average Outstanding Price, Rights Granted	$ 42.87
Weighted Average Outstanding Price, Rights Exercised	$ 0
Weighted Average Outstanding Price, Rights Cancelled	$ 0
Weighted Average Exercise Price at end of period	$ 42.87
Weighted Average Exercise Price, Exercisable at end of period	$ 47.32
Weighted Average Remaining Contractual Life, Outstanding at end of period	6 years 8 months 12 days
Weighted Average Remaining Contractual Life, Exercisable at end of period	5 years 8 months 12 days
Aggregate Intrinsic Value, Outstanding at end of period	$ 8
Aggregate Intrinsic Value, Exercisable at end of period	$ 0