Share - Based Compensation (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Compensation costs charged to expense under award programs
Total compensation costs under award programs	$ 6,954	$ 6,913	$ 6,627
Stock Options and Stock Appreciation Rights [ Member]
Compensation costs charged to expense under award programs
Total compensation costs under award programs	2,954	2,440	1,961
Performance Shares [Member]
Compensation costs charged to expense under award programs
Total compensation costs under award programs	854	2,082	2,006
Restricted stock and Restricted Stock units [Member]
Compensation costs charged to expense under award programs
Total compensation costs under award programs	$ 3,146	$ 2,391	$ 2,660