Stock-Based Compensation - Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Stock Options
Stock options activity
Outstanding, beginning of period (in shares)	1,369,442
Granted (in shares)	282,798
Exercised (in shares)	(252,975)
Cancelled / Forfeited (in shares)	(95,248)
Outstanding, end of period (in shares)	1,304,017	1,369,442
Vested and exercisable, end of period (in shares)	842,746
Vested and expected to vest, end of period (in shares)	1,249,802
Weighted Average Exercise Price
Outstanding, beginning of period (in dollars per share)	$ 45.93
Granted (in dollars per share)	113.88	$ 64.30	$ 46.31
Exercised (in dollars per share)	39.24
Cancelled / Forfeited (in dollars per share)	68.25
Outstanding, end of period (in dollars per share)	60.33	$ 45.93
Vested and exercisable, end of period (in dollars per share)	48.81
Vested and expected to vest, end of period (in dollars per share)	$ 59.52
Weighted Average Remaining Contractual Term
Outstanding, end of period	6 years 11 months 8 days	7 years 2 months 23 days
Vested and exercisable, end of period	6 years 1 month 9 days
Vested and expected to vest, end of period	6 years 10 months 13 days
Aggregate Intrinsic Value
Outstanding, beginning of period	$ 64,103
Outstanding, end of period	83,388	$ 64,103
Vested and exercisable, end of period	63,598
Vested and expected to vest, end of period	$ 80,935
Restricted Stock Units
Restricted stock units activity
Outstanding, beginning of period (in shares)	621,700
Granted (in shares)	645,146
Settled (in shares)	(392,364)
Cancelled / Forfeited (in shares)	(80,764)
Outstanding, end of period (in shares)	793,718	621,700
Vested and expected to vest (in shares)	748,240
Weighted Average Grant Date Fair Value
Outstanding, beginning of period (in dollars per share)	$ 53.64
Granted (in dollars per share)	114.72	$ 64.32	$ 46.59
Settled (RSUs) (in dollars per share)	60.51
Cancelled / Forfeited (in dollars per share)	68.58
Outstanding, end of period (in dollars per share)	$ 98.38	$ 53.64
Vested and expected to vest, end of period (in dollars per share)	99.36

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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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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For presentations that combine terminations, 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 or that expired.

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Weighted average price of options that were either forfeited or expired.

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

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Number of fully vested and expected to vest options outstanding that can be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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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 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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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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

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