Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The cash outflow to reacquire common stock during the period.

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Number of treasury shares (units) reissued during the period, excluding reissuance of shares (units) held in treasury used to satisfy equity-based compensation obligations exercised by the holders of such rights. Upon reissuance of shares (units) from treasury, either the common or preferred stock (unit) reissued is outstanding.

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Share Capital, Option Plans and Share-Based Payments - Long-Term Incentive Plans (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Mar. 31, 2019	Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of treasury stock (in shares)	61,794			20,000			609,691	407,443
Purchase of treasury stock	$ 2,000						$ 26,499	$ 0
Long Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term of plan							3 years
Compensation cost related to unvested awards not yet recognized	$ 16,400						$ 16,400
Unvested stock awards compensation cost, weighted average recognition period							1 year 10 months 24 days
Fiscal 2018 LTIP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of treasury stock (in shares)		539,103
Purchase of treasury stock		$ 13,800
Treasury Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of treasury stock (in shares)	62,000	545,000	3,000	20,000	379,000	9,000