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Stock-Based Compensation - Changes in Stock Options (Details)	6 Months Ended
	Dec. 31, 2017 USD ($) $ / shares shares
Changes in stock options
Options outstanding, June 30, 2017 | shares	1,726,791
Options, Granted | shares	0
Options, Exercised | shares	(521,259)
Options, Lapsed or Forfeited | shares	(62,763)
Options outstanding, December 31, 2017 | shares	1,142,769
Options vested and expected to vest, December 31, 2017 | shares	1,136,169
Options exercisable, December 31, 2017 | shares	888,358
Weighted Average Exercise Price, Options outstanding, June 30, 2017 | $ / shares	$ 34.08
Weighted Average Exercise Price, Granted | $ / shares	0.00
Weighted Average Exercise Price, Exercised | $ / shares	36.63
Weighted Average Exercise Price, Lapsed or Forfeited | $ / shares	39.46
Weighted Average Exercise Price, Options outstanding, December 31, 2017 | $ / shares	32.62
Weighted Average Exercise Price, Option vested and expected to vest, December 31, 2017 | $ / shares	32.64
Weighted Average Exercise Price, Options exercisable, December 31, 2017 | $ / shares	$ 34.36
Weighted Average Remaining Life, Options outstanding, December 31, 2017	5 years 5 months
Weighted Average Remaining Life, Options vested and expected to vest, December 31, 2017	5 years 5 months
Weighted Average Remaining Life, Options exercisable, December 31, 2017	4 years 8 months
Aggregate Intrinsic value, Options outstanding, December 31, 2017 | $	$ 18,049,000
Aggregate Intrinsic Value, Options vested and expected to vest, December 31, 2017 | $	17,916,000
Aggregate Intrinsic Value, Options exercisable, December 31, 2017 | $	$ 12,485,000

X

- Definition

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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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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Amount by which current fair value of underlying stock exceeds exercise price of 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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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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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for fully vested and expected to vest options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. 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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Number of share options (or share units) exercised during the current period.

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