Share-Based Compensation - Summary of Director Stock Units Activity (Details) - Non-employee Board of Director's Plan - $ / shares	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Number of Units
Balance at the beginning of the period (in shares)	323,159	324,555	329,746
Granted (in shares)	62,144	23,002	21,158
Distributed (in shares)	(40,901)	(32,779)	(32,352)
Dividend equivalents (in shares)	8,963	8,381	6,003
Balance at the end of the period (in shares)	353,365	323,159	324,555
Weighted Average Grant Date Fair Value
Balance at the beginning of the period (in dollars per share)	$ 36.25	$ 35.25	$ 33.05
Granted (in dollars per share)	18.55	48.72	56.00
Distributed (in dollars per share)	38.63	33.03	39.01
Dividend equivalents (in dollars per share)	0	0	0
Balance at the end of the period (in dollars per share)	$ 35.54	$ 36.25	$ 35.25