Stock Based Compensation Plans (Schedule of Shares of Common Stock under Options for All Plans) (Detail) - Common stock under option - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Shares subject to option
Shares subject to option, Beginning balance	260	302	397
Shares subject to option, Granted	0	28	0
Shares subject to option, Exercised	(96)	(70)	(95)
Shares subject to option, Forfeited (including cancelled options)	(35)	0	0
Shares subject to option, Ending balance	129	260	302
Options exercisable at June 30, 2018	129
Weighted average exercise price per share
Weighted average exercise price per share, beginning balance	$ 8.36	$ 7.19	$ 7.28
Weighted average exercise price per share, granted	0.00	20.03	0.00
Weighted average exercise price per share, exercised	6.29	7.90	7.56
Weighted average exercise price per share, forfeited (including canceled options)	17.61	0.00	0.00
Weighted average exercise price per share, ending balance	7.44	$ 8.36	$ 7.19
Weighted average exercise price per share, options exercisable at June 30, 2018	$ 7.44
Aggregate Intrinsic Value, Balance at June 30, 2018	$ 0	$ 0
Aggregate Intrinsic Value, Options exercisable at June 30, 2018	$ 0

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Gross number of share options (or share units) granted during the period.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Number of share options (or share units) exercised during the current period.

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