Fair Value Measurements (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Jun. 30, 2017
Assets
Total Assets	$ 23,973	$ 27,091
Equity securities
Assets
Total Assets	23,973	27,091
Level 1
Assets
Total Assets	23,973	27,091
Level 1 | Equity securities
Assets
Total Assets	$ 23,973	$ 27,091