Stock-Based Compensation - Summary of Stock Option Plans (Detail) - Stock Options - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Number of Shares
Outstanding at beginning of period	258,000	830,000
Granted	0	0	0
Exercised	(207,000)	(524,000)
Cancelled	0	(48,000)
Outstanding at end of period	51,000	258,000	830,000
Vested and expected to vest at end of period	51,000
Exercisable at end of period	51,000
Weighted Average Exercise Price (in dollars per share)
Outstanding at beginning of period	$ 13.34	$ 13.43
Granted	0.00	0.00
Exercised	13.29	13.12
Cancelled	0.00	17.25
Outstanding at end of period	13.53	$ 13.34	$ 13.43
Vested and expected to vest at end of period	13.53
Exercisable at end of period	$ 13.53
Weighted Average Remaining Contractual Term (Years)
Outstanding at end of period	7 months 6 days	1 year 22 days	1 year 7 months 28 days
Vested and expected to vest at end of period	7 months 6 days
Exercisable at end of period	7 months 6 days
Aggregate Intrinsic Value
Outstanding at end of period	$ 1,442
Vested and expected to vest at end of period	1,442
Exercisable at end of period	$ 1,442