Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020
Operating Leases:
ROU assets associated with operating leases	$ 32,407	$ 32,948
Finance Lease:
Property, plant and equipment, gross	108,387	104,374
Accumulated depreciation	(90,251)	(86,540)
Property, plant and equipment, net	$ 18,136	$ 17,834
Weighted average remaining lease term (in years)
Operating leases	9 years 5 months 15 days	9 years 6 months 25 days
Finance lease	2 years 5 months 19 days	2 years 8 months 19 days
Weighted average discount rate
Operating leases	4.83%	4.45%
Finance lease	5.46%	5.46%