Goodwill and Intangible Assets (Summary of Goodwill) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Goodwill [Roll Forward]
Balance at beginning of period	$ 80,216	$ 70,877
Additions due to acquisitions	58,866	9,339
Balance at end of period	$ 139,082	$ 80,216