Stock Incentive Plans - Long term incentive plans (Details) - LTIP - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
LTIP three-year plan	. 18, 2016	. 17, 2015	. 16, 2014
Number of shares issued	293,136	308,278	227,707
Share value on date of issuance (in USD per share)	$ 183.00	$ 176.39	$ 157.07
Total value	$ 53,644	$ 54,377	$ 35,766

Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued, Average Price

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Stock Incentive Plans, Plan Name

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Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards.

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Aggregate value of stock related to Restricted Stock Awards issued during the period.

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